Update acct.c #105

hosembafer · 2014-06-30T10:03:58Z

No description provided.

Turn it into (for example): [ 0.073380] x86: Booting SMP configuration: [ 0.074005] .... node #0, CPUs: #1 #2 #3 #4 #5 torvalds#6 torvalds#7 [ 0.603005] .... node #1, CPUs: torvalds#8 torvalds#9 torvalds#10 torvalds#11 torvalds#12 torvalds#13 torvalds#14 torvalds#15 [ 1.200005] .... node #2, CPUs: torvalds#16 torvalds#17 torvalds#18 torvalds#19 torvalds#20 torvalds#21 torvalds#22 torvalds#23 [ 1.796005] .... node #3, CPUs: torvalds#24 torvalds#25 torvalds#26 torvalds#27 torvalds#28 torvalds#29 torvalds#30 torvalds#31 [ 2.393005] .... node #4, CPUs: torvalds#32 torvalds#33 torvalds#34 torvalds#35 torvalds#36 torvalds#37 torvalds#38 torvalds#39 [ 2.996005] .... node #5, CPUs: torvalds#40 torvalds#41 torvalds#42 torvalds#43 torvalds#44 torvalds#45 torvalds#46 torvalds#47 [ 3.600005] .... node torvalds#6, CPUs: torvalds#48 torvalds#49 torvalds#50 torvalds#51 #52 #53 torvalds#54 torvalds#55 [ 4.202005] .... node torvalds#7, CPUs: torvalds#56 torvalds#57 #58 torvalds#59 torvalds#60 torvalds#61 torvalds#62 torvalds#63 [ 4.811005] .... node torvalds#8, CPUs: torvalds#64 torvalds#65 torvalds#66 torvalds#67 torvalds#68 torvalds#69 #70 torvalds#71 [ 5.421006] .... node torvalds#9, CPUs: torvalds#72 torvalds#73 torvalds#74 torvalds#75 torvalds#76 torvalds#77 torvalds#78 torvalds#79 [ 6.032005] .... node torvalds#10, CPUs: torvalds#80 torvalds#81 torvalds#82 torvalds#83 torvalds#84 torvalds#85 torvalds#86 torvalds#87 [ 6.648006] .... node torvalds#11, CPUs: torvalds#88 torvalds#89 torvalds#90 torvalds#91 torvalds#92 torvalds#93 torvalds#94 torvalds#95 [ 7.262005] .... node torvalds#12, CPUs: torvalds#96 torvalds#97 torvalds#98 torvalds#99 torvalds#100 torvalds#101 torvalds#102 torvalds#103 [ 7.865005] .... node torvalds#13, CPUs: torvalds#104 torvalds#105 torvalds#106 torvalds#107 torvalds#108 torvalds#109 torvalds#110 torvalds#111 [ 8.466005] .... node torvalds#14, CPUs: torvalds#112 torvalds#113 torvalds#114 torvalds#115 torvalds#116 torvalds#117 torvalds#118 torvalds#119 [ 9.073006] .... node torvalds#15, CPUs: torvalds#120 torvalds#121 torvalds#122 torvalds#123 torvalds#124 torvalds#125 torvalds#126 torvalds#127 [ 9.679901] x86: Booted up 16 nodes, 128 CPUs and drop useless elements. Change num_digits() to hpa's division-avoiding, cell-phone-typed version which he went at great lengths and pains to submit on a Saturday evening. Signed-off-by: Borislav Petkov <bp@suse.de> Cc: huawei.libin@huawei.com Cc: wangyijing@huawei.com Cc: fenghua.yu@intel.com Cc: guohanjun@huawei.com Cc: paul.gortmaker@windriver.com Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20130930095624.GB16383@pd.tnic Signed-off-by: Ingo Molnar <mingo@kernel.org>

…anges Sasha reported the following bug using trinity [ 886.745765] kernel BUG at mm/mprotect.c:149! [ 886.746831] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC [ 886.748511] Dumping ftrace buffer: [ 886.749998] (ftrace buffer empty) [ 886.750110] Modules linked in: [ 886.751396] CPU: 20 PID: 26219 Comm: trinity-c216 Tainted: G W 3.14.0-rc5-next-20140305-sasha-00011-ge06f5f3-dirty torvalds#105 [ 886.751396] task: ffff8800b6c80000 ti: ffff880228436000 task.ti: ffff880228436000 [ 886.751396] RIP: 0010:[<ffffffff812aab33>] [<ffffffff812aab33>] change_protection_range+0x3b3/0x500 [ 886.751396] RSP: 0000:ffff880228437da8 EFLAGS: 00010282 [ 886.751396] RAX: 8000000527c008e5 RBX: 00007f647916e000 RCX: 0000000000000000 [ 886.751396] RDX: ffff8802ef488e40 RSI: 00007f6479000000 RDI: 8000000527c008e5 [ 886.751396] RBP: ffff880228437e78 R08: 0000000000000000 R09: 0000000000000000 [ 886.751396] R10: 0000000000000001 R11: 0000000000000000 R12: ffff8802ef488e40 [ 886.751396] R13: 00007f6479000000 R14: 00007f647916e000 R15: 00007f646e34e000 [ 886.751396] FS: 00007f64b28d4700(0000) GS:ffff88052ba00000(0000) knlGS:0000000000000000 [ 886.751396] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 886.751396] CR2: 00007f64aed83af8 CR3: 0000000206e52000 CR4: 00000000000006a0 [ 886.751396] Stack: [ 886.751396] ffff880200000001 ffffffff8447f152 ffff880228437dd8 ffff880228af3000 [ 886.769142] 00007f646e34e000 00007f647916dfff 0000000000000000 00007f647916e000 [ 886.769142] ffff880206e527f0 00007f647916dfff 0000000000000000 0000000000000000 [ 886.769142] Call Trace: [ 886.769142] [<ffffffff8447f152>] ? preempt_count_sub+0xe2/0x120 [ 886.769142] [<ffffffff812aaca5>] change_protection+0x25/0x30 [ 886.769142] [<ffffffff812c3eeb>] change_prot_numa+0x1b/0x30 [ 886.769142] [<ffffffff8118df49>] task_numa_work+0x279/0x360 [ 886.769142] [<ffffffff8116c57e>] task_work_run+0xae/0xf0 [ 886.769142] [<ffffffff8106ffbe>] do_notify_resume+0x8e/0xe0 [ 886.769142] [<ffffffff8447a93b>] retint_signal+0x4d/0x92 [ 886.769142] Code: 49 8b 3c 24 48 83 3d fc 2e ba 04 00 75 12 0f 0b 0f 1f 84 00 00 00 00 00 eb fe 66 0f 1f 44 00 00 48 89 f8 66 66 66 90 84 c0 79 0d <0f> 0b 0f 1f 00 eb fe 66 0f 1f 44 00 00 8b 4d 9c 44 8b 4d 98 +89 [ 886.769142] RIP [<ffffffff812aab33>] change_protection_range+0x3b3/0x500 [ 886.769142] RSP <ffff880228437da8> The VM_BUG_ON was added by the patch "mm,numa: reorganize change_pmd_range". The race existed without the patch but was just harder to hit. The problem is that a transhuge check is made without holding the PTL. It's possible at the time of the check that a parallel fault clears the pmd and inserts a new one which then triggers the VM_BUG_ON check. This patch removes the VM_BUG_ON but fixes the race by rechecking transhuge under the PTL when marking page tables for NUMA hinting and bailing if a race occurred. It is not a problem for calls to mprotect() as they hold mmap_sem for write. Signed-off-by: Mel Gorman <mgorman@suse.de> Reported-by: Sasha Levin <sasha.levin@oracle.com> Reviewed-by: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

…anges Sasha reported the following bug using trinity kernel BUG at mm/mprotect.c:149! invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 20 PID: 26219 Comm: trinity-c216 Tainted: G W 3.14.0-rc5-next-20140305-sasha-00011-ge06f5f3-dirty torvalds#105 task: ffff8800b6c80000 ti: ffff880228436000 task.ti: ffff880228436000 RIP: change_protection_range+0x3b3/0x500 Call Trace: change_protection+0x25/0x30 change_prot_numa+0x1b/0x30 task_numa_work+0x279/0x360 task_work_run+0xae/0xf0 do_notify_resume+0x8e/0xe0 retint_signal+0x4d/0x92 The VM_BUG_ON was added in -mm by the patch "mm,numa: reorganize change_pmd_range". The race existed without the patch but was just harder to hit. The problem is that a transhuge check is made without holding the PTL. It's possible at the time of the check that a parallel fault clears the pmd and inserts a new one which then triggers the VM_BUG_ON check. This patch removes the VM_BUG_ON but fixes the race by rechecking transhuge under the PTL when marking page tables for NUMA hinting and bailing if a race occurred. It is not a problem for calls to mprotect() as they hold mmap_sem for write. Signed-off-by: Mel Gorman <mgorman@suse.de> Reported-by: Sasha Levin <sasha.levin@oracle.com> Reviewed-by: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The function hso_serial_common_free() is called either by the cleanup method of the tty or by the usb disconnect method. In the former case, the usb_disconnect() has been already called and the sysfs group associated to the device has been removed. By calling tty_unregister directly from the usb_disconnect() method, we avoid a warning due to the removal of the sysfs group of the usb device. Example of warning: ------------[ cut here ]------------ WARNING: CPU: 0 PID: 778 at fs/sysfs/group.c:225 sysfs_remove_group+0x50/0x94() sysfs group c0645a88 not found for kobject 'ttyHS5' Modules linked in: CPU: 0 PID: 778 Comm: kworker/0:3 Tainted: G W 3.18.0+ torvalds#105 Workqueue: events release_one_tty [<c000dfe4>] (unwind_backtrace) from [<c000c014>] (show_stack+0x14/0x1c) [<c000c014>] (show_stack) from [<c0016bac>] (warn_slowpath_common+0x5c/0x7c) [<c0016bac>] (warn_slowpath_common) from [<c0016c60>] (warn_slowpath_fmt+0x30/0x40) [<c0016c60>] (warn_slowpath_fmt) from [<c00ddd14>] (sysfs_remove_group+0x50/0x94) [<c00ddd14>] (sysfs_remove_group) from [<c0221e44>] (device_del+0x30/0x190) [<c0221e44>] (device_del) from [<c0221fb0>] (device_unregister+0xc/0x18) [<c0221fb0>] (device_unregister) from [<c0221fec>] (device_destroy+0x30/0x3c) [<c0221fec>] (device_destroy) from [<c01fe1dc>] (tty_unregister_device+0x2c/0x5c) [<c01fe1dc>] (tty_unregister_device) from [<c029a428>] (hso_serial_common_free+0x2c/0x88) [<c029a428>] (hso_serial_common_free) from [<c029a4c0>] (hso_serial_ref_free+0x3c/0xb8) [<c029a4c0>] (hso_serial_ref_free) from [<c01ff430>] (release_one_tty+0x30/0x84) [<c01ff430>] (release_one_tty) from [<c00271d4>] (process_one_work+0x21c/0x3c8) [<c00271d4>] (process_one_work) from [<c0027758>] (worker_thread+0x3d8/0x560) [<c0027758>] (worker_thread) from [<c002be4c>] (kthread+0xc0/0xcc) [<c002be4c>] (kthread) from [<c0009630>] (ret_from_fork+0x14/0x24) ---[ end trace cb88537fdc8fa208 ]--- Signed-off-by: Olivier Sobrie <olivier@sobrie.be> Signed-off-by: David S. Miller <davem@davemloft.net>

@offset

The following message can be observed on the Ubuntu v3.13.0-65 with KASan backported: ================================================================== BUG: KASan: use after free in task_numa_find_cpu+0x64c/0x890 at addr ffff880dd393ecd8 Read of size 8 by task qemu-system-x86/3998900 ============================================================================= BUG kmalloc-128 (Tainted: G B ): kasan: bad access detected ----------------------------------------------------------------------------- INFO: Allocated in task_numa_fault+0xc1b/0xed0 age=41980 cpu=18 pid=3998890 __slab_alloc+0x4f8/0x560 __kmalloc+0x1eb/0x280 task_numa_fault+0xc1b/0xed0 do_numa_page+0x192/0x200 handle_mm_fault+0x808/0x1160 __do_page_fault+0x218/0x750 do_page_fault+0x1a/0x70 page_fault+0x28/0x30 SyS_poll+0x66/0x1a0 system_call_fastpath+0x1a/0x1f INFO: Freed in task_numa_free+0x1d2/0x200 age=62 cpu=18 pid=0 __slab_free+0x2ab/0x3f0 kfree+0x161/0x170 task_numa_free+0x1d2/0x200 finish_task_switch+0x1d2/0x210 __schedule+0x5d4/0xc60 schedule_preempt_disabled+0x40/0xc0 cpu_startup_entry+0x2da/0x340 start_secondary+0x28f/0x360 INFO: Slab 0xffffea00374e4f00 objects=37 used=17 fp=0xffff880dd393ecb0 flags=0x6ffff0000004080 INFO: Object 0xffff880dd393ecb0 @offset=11440 fp=0xffff880dd393f700 Bytes b4 ffff880dd393eca0: 0c 00 00 00 18 00 00 00 af 63 3a 04 01 00 00 00 .........c:..... Object ffff880dd393ecb0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880dd393ecc0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880dd393ecd0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880dd393ece0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880dd393ecf0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880dd393ed00: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880dd393ed10: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff880dd393ed20: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 kkkkkkkkkkkkkkk. CPU: 61 PID: 3998900 Comm: qemu-system-x86 Tainted: G B 3.13.0-65-generic torvalds#105 Hardware name: Supermicro X8QB6/X8QB6, BIOS 2.0c 06/11/2 ffffea00374e4f00 ffff8816c572b420 ffffffff81a6ce35 ffff88045f00f500 ffff8816c572b450 ffffffff81244aed ffff88045f00f500 ffffea00374e4f00 ffff880dd393ecb0 0000000000000012 ffff8816c572b478 ffffffff8124ac36 Call Trace: [<ffffffff81a6ce35>] dump_stack+0x45/0x56 [<ffffffff81244aed>] print_trailer+0xfd/0x170 [<ffffffff8124ac36>] object_err+0x36/0x40 [<ffffffff8124cbf9>] kasan_report_error+0x1e9/0x3a0 [<ffffffff8124d260>] kasan_report+0x40/0x50 [<ffffffff810dda7c>] ? task_numa_find_cpu+0x64c/0x890 [<ffffffff8124bee9>] __asan_load8+0x69/0xa0 [<ffffffff814f5c38>] ? find_next_bit+0xd8/0x120 [<ffffffff810dda7c>] task_numa_find_cpu+0x64c/0x890 [<ffffffff810de16c>] task_numa_migrate+0x4ac/0x7b0 [<ffffffff810de523>] numa_migrate_preferred+0xb3/0xc0 [<ffffffff810e0b88>] task_numa_fault+0xb88/0xed0 [<ffffffff8120ef02>] do_numa_page+0x192/0x200 [<ffffffff81211038>] handle_mm_fault+0x808/0x1160 [<ffffffff810d7dbd>] ? sched_clock_cpu+0x10d/0x160 [<ffffffff81068c52>] ? native_load_tls+0x82/0xa0 [<ffffffff81a7bd68>] __do_page_fault+0x218/0x750 [<ffffffff810c2186>] ? hrtimer_try_to_cancel+0x76/0x160 [<ffffffff81a6f5e7>] ? schedule_hrtimeout_range_clock.part.24+0xf7/0x1c0 [<ffffffff81a7c2ba>] do_page_fault+0x1a/0x70 [<ffffffff81a772e8>] page_fault+0x28/0x30 [<ffffffff8128cbd4>] ? do_sys_poll+0x1c4/0x6d0 [<ffffffff810e64f6>] ? enqueue_task_fair+0x4b6/0xaa0 [<ffffffff810233c9>] ? sched_clock+0x9/0x10 [<ffffffff810cf70a>] ? resched_task+0x7a/0xc0 [<ffffffff810d0663>] ? check_preempt_curr+0xb3/0x130 [<ffffffff8128b5c0>] ? poll_select_copy_remaining+0x170/0x170 [<ffffffff810d3bc0>] ? wake_up_state+0x10/0x20 [<ffffffff8112a28f>] ? drop_futex_key_refs.isra.14+0x1f/0x90 [<ffffffff8112d40e>] ? futex_requeue+0x3de/0xba0 [<ffffffff8112e49e>] ? do_futex+0xbe/0x8f0 [<ffffffff81022c89>] ? read_tsc+0x9/0x20 [<ffffffff8111bd9d>] ? ktime_get_ts+0x12d/0x170 [<ffffffff8108f699>] ? timespec_add_safe+0x59/0xe0 [<ffffffff8128d1f6>] SyS_poll+0x66/0x1a0 [<ffffffff81a830dd>] system_call_fastpath+0x1a/0x1f Memory state around the buggy address: ffff880dd393eb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff880dd393ec00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff880dd393ec80: fc fc fc fc fc fc fb fb fb fb fb fb fb fb fb fb ^ ffff880dd393ed00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc ffff880dd393ed80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== As commit 1effd9f ("sched/numa: Fix unsafe get_task_struct() in task_numa_assign()") points out, the rcu_read_lock() cannot protect the task_struct from being freed in the finish_task_switch(). And the bug happens in the process of calculation of imp which requires the access of p->numa_faults being freed in the following path: do_exit() current->flags |= PF_EXITING; release_task() ~~delayed_put_task_struct()~~ schedule() ... ... rq->curr = next; context_switch() finish_task_switch() put_task_struct() __put_task_struct() task_numa_free() The fix here to get_task_struct() early before end of dst_rq->lock to protect the calculation process and also put_task_struct() in the corresponding point if finally the dst_rq->curr somehow cannot be assigned. BugLink: https://bugs.launchpad.net/bugs/1527643 Signed-off-by: Gavin Guo <gavin.guo@canonical.com> Signed-off-by: Liang Chen <liangchen.linux@gmail.com>

Modify spi_imx_clkdiv_2() to return the resulting bus clock frequency when the selected clock divider is applied. Set spi_imx->spi_bus_clk to this frequency. If spi_bus_clk is unset, spi_imx_calculate_timeout() causes a division by 0. [ 90.356106] Division by zero in kernel. [ 90.362631] CPU: 0 PID: 130 Comm: spidev_test Not tainted 4.8.0-rc3-next-20160825+ torvalds#105 [ 90.372461] Hardware name: Freescale i.MX25 (Device Tree Support) [ 90.378708] Backtrace: [...] [ 90.409251] [<c000dda0>] (__div0) from [<c0175b3c>] (Ldiv0+0x8/0x10) [ 90.415783] [<bf007c8c>] (spi_imx_calculate_timeout [spi_imx]) from [<bf007ee8>] (spi_imx_transfer+0x220/0x278 [spi_imx]) [ 90.426924] [<bf007cc8>] (spi_imx_transfer [spi_imx]) from [<c01f1560>] (spi_bitbang_transfer_one+0x60/0x8c) [ 90.436864] r8:d3ad52c8 r7:d3ad5800 r6:d3ad5000 r5:d3ae4f40 r4:00000000 [ 90.443737] [<c01f1500>] (spi_bitbang_transfer_one) from [<c01edcb0>] (spi_transfer_one_message+0x12c/0x37c) [ 90.453668] r8:c0a530e4 r7:d3ad5178 r6:d3ad5800 r5:d3ad5000 r4:d3b13e88 r3:00000000 [ 90.461633] [<c01edb84>] (spi_transfer_one_message) from [<c01ee428>] (__spi_pump_messages+0x528/0x568) Signed-off-by: Martin Kaiser <martin@kaiser.cx>

commit 3898da9 ("KVM: avoid using rcu_dereference_protected") can trigger the following lockdep/rcu splat if the VM_CREATE ioctl fails, for example if kvm_arch_init_vm fails: WARNING: suspicious RCU usage 4.13.0+ torvalds#105 Not tainted ----------------------------- ./include/linux/kvm_host.h:481 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 no locks held by qemu-system-s39/79. stack backtrace: CPU: 0 PID: 79 Comm: qemu-system-s39 Not tainted 4.13.0+ torvalds#105 Hardware name: IBM 2964 NC9 704 (KVM/Linux) Call Trace: ([<00000000001140b2>] show_stack+0xea/0xf0) [<00000000008a68a4>] dump_stack+0x94/0xd8 [<0000000000134c12>] kvm_dev_ioctl+0x372/0x7a0 [<000000000038f940>] do_vfs_ioctl+0xa8/0x6c8 [<0000000000390004>] SyS_ioctl+0xa4/0xb8 [<00000000008c7a8c>] system_call+0xc4/0x27c no locks held by qemu-system-s39/79. We have to reset the just created users_count back to 0 to tell the check to not trigger. Reported-by: Stefan Haberland <sth@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Fixes: 3898da9 ("KVM: avoid using rcu_dereference_protected") Cc: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>

Rebase 4.14-rc7 patches onto 4.14-rc8

ICSR RETTOBASE bit indicates whether there is any active exception other than the exception indicated by current value of IPSR. Existing code already makes use of it to find whether interrupt occurred during user(thread) mode. Add preemption support in the code path that executes upon finding an active exception other than the current interrupt. Having an active exception during interrupt exception indicates that the interrupt occurred during SVC or PendSV with current Linux exception setup. On PendSV, interrupts are disabled at exception entry (applicable to all) & enabled back just before returning from exception. Hence it has been assumed that active exception during interrupt is indicating SVC interruption. This would have to be revisited. With this change, there is some effect, but not enough to make it usable, this is being debugged. A simple character driver that does infinite while loop during read was used to test it as follows (/dev/mymisc corresponds to the node for the character driver), A. Before this change, A.1 ~ # cat /dev/mymisc [ 28.099225] mymisc_open [ 28.101625] mymisc_read: enter command prompt is not usable (expected), interrupts do happen during this time. A.2 ~ # cat /dev/mymisc & [1] 39 cat /dev/mymisc ~ # [ 11.699880] mymisc_open [ 11.702274] mymisc_read: enter command prompt is not usable (expected as preemption not supported). B. After this change, B.1 ~ # cat /dev/mymisc [ 27.374821] mymisc_open [ 27.377349] mymisc_read: enter though user will not get control back (as expected as it is fg process), entering on prompt causes new line, doesn't know what to make out of this behaviour, this doesn't happen in the A.1 case. Interrupts happen here as well. B.2 ~ # cat /dev/mymisc & [1] 41 cat /dev/mymisc ~ # [ 44.836417] mymisc_open [ 44.838814] mymisc_read: enter though prompt is available under the control of user, upon typing anything on the prompt (typed character doesn't get echoed), it crashes as follows, [ 44.838814] mymisc_read: enter [ 51.710314] [ 51.710314] Unhandled exception: IPSR = 00000006 LR = fffffffd [ 51.717576] CPU: 0 PID: 37 Comm: sh Not tainted 5.5.0-rc4-00004-g2328d01dbd85 torvalds#105 [ 51.725078] Hardware name: STM32 (Device Tree Support) [ 51.730206] PC is at 0x90195958 [ 51.733329] LR is at 0x901c4df3 [ 51.736471] pc : [<90195958>] lr : [<901c4df3>] psr: 21000000 [ 51.742713] sp : 901e5a58 ip : 00000000 fp : 901d89fc [ 51.747911] r10: 00000000 r9 : 00000000 r8 : 00000001 [ 51.753143] r7 : 000000a8 r6 : 901e5a58 r5 : 901e5b08 r4 : ffffffff [ 51.759643] r3 : 000000a8 r2 : ffffffff r1 : 00000001 r0 : 00000001 [ 51.766122] xPSR: 21000000 [ 51.768866] CPU: 0 PID: 37 Comm: sh Not tainted 5.5.0-rc4-00004-g2328d01dbd85 torvalds#105 [ 51.776369] Hardware name: STM32 (Device Tree Support) [ 51.781594] [<0800c0c9>] (unwind_backtrace) from [<0800b25b>] (show_stack+0xb/0xc) [ 51.789166] [<0800b25b>] (show_stack) from [<0800b9eb>] (__invalid_entry+0x4b/0x4c) It is a Usage Fault happening while in thread(user) mode. PC & LR in the dump is strange in the sense that they do not point to text section. The change here has been made based on how Cortex-A handles preemption. Since PAN is not applicable and since it seemed that saving & restoring thread_info::addr_limit does not make difference on the !MMU Cortex-M due to single address space being used, there was no additional save & restore of 'dacr' & 'addr_limit' as done in the case of interrupt during system call on Cortex-A. Also as DUT was UP Cortex-M4, it seemed that cache related would not affect in anyway w.r.t preemption, as currently cache is not enabled for M4 in Linux. As mentioned above, it was assumed that active exception during interrupt meant SVC was interrupted, though it could have been PendSV as well. To ensure that issue is not due to interrupt during PendSV, the PendSV handling of pending work was lifted & sticked onto __irq_entry and setting PendSV removed as well. Still the behaviour is same. Signed-off-by: afzal mohammed <afzal.mohd.ma@gmail.com>

statfs calculates Total/Used/Avail disk space in block unit, so we should translate soft/hard prjquota limit to block unit as well. Below testing result shows the block/inode numbers of Total/Used/Avail from df command are all correct afer applying this patch. [root@localhost quota-tools]\# ./repquota -P /dev/sdb1 *** Report for project quotas on device /dev/sdb1 Block grace time: 7days; Inode grace time: 7days Block limits File limits Project used soft hard grace used soft hard grace ----------------------------------------------------------- \#0 -- 4 0 0 1 0 0 \torvalds#101 -- 0 0 0 2 0 0 \torvalds#102 -- 0 10240 0 2 10 0 \torvalds#103 -- 0 0 20480 2 0 20 \torvalds#104 -- 0 10240 20480 2 10 20 \torvalds#105 -- 0 20480 10240 2 20 10 [root@localhost sdb1]\# lsattr -p t{1,2,3,4,5} 101 ----------------N-- t1/a1 102 ----------------N-- t2/a2 103 ----------------N-- t3/a3 104 ----------------N-- t4/a4 105 ----------------N-- t5/a5 [root@localhost sdb1]\# df -hi t{1,2,3,4,5} Filesystem Inodes IUsed IFree IUse% Mounted on /dev/sdb1 2.4M 21 2.4M 1% /mnt/sdb1 /dev/sdb1 10 2 8 20% /mnt/sdb1 /dev/sdb1 20 2 18 10% /mnt/sdb1 /dev/sdb1 10 2 8 20% /mnt/sdb1 /dev/sdb1 10 2 8 20% /mnt/sdb1 [root@localhost sdb1]\# df -h t{1,2,3,4,5} Filesystem Size Used Avail Use% Mounted on /dev/sdb1 10G 489M 9.6G 5% /mnt/sdb1 /dev/sdb1 10M 0 10M 0% /mnt/sdb1 /dev/sdb1 20M 0 20M 0% /mnt/sdb1 /dev/sdb1 10M 0 10M 0% /mnt/sdb1 /dev/sdb1 10M 0 10M 0% /mnt/sdb1 Fixes: 909110c ("f2fs: choose hardlimit when softlimit is larger than hardlimit in f2fs_statfs_project()") Signed-off-by: Chengguang Xu <cgxu519@mykernel.net>

statfs calculates Total/Used/Avail disk space in block unit, so we should translate soft/hard prjquota limit to block unit as well. Below testing result shows the block/inode numbers of Total/Used/Avail from df command are all correct afer applying this patch. [root@localhost quota-tools]\# ./repquota -P /dev/sdb1 *** Report for project quotas on device /dev/sdb1 Block grace time: 7days; Inode grace time: 7days Block limits File limits Project used soft hard grace used soft hard grace ----------------------------------------------------------- \#0 -- 4 0 0 1 0 0 \torvalds#101 -- 0 0 0 2 0 0 \torvalds#102 -- 0 10240 0 2 10 0 \torvalds#103 -- 0 0 20480 2 0 20 \torvalds#104 -- 0 10240 20480 2 10 20 \torvalds#105 -- 0 20480 10240 2 20 10 [root@localhost sdb1]\# lsattr -p t{1,2,3,4,5} 101 ----------------N-- t1/a1 102 ----------------N-- t2/a2 103 ----------------N-- t3/a3 104 ----------------N-- t4/a4 105 ----------------N-- t5/a5 [root@localhost sdb1]\# df -hi t{1,2,3,4,5} Filesystem Inodes IUsed IFree IUse% Mounted on /dev/sdb1 2.4M 21 2.4M 1% /mnt/sdb1 /dev/sdb1 10 2 8 20% /mnt/sdb1 /dev/sdb1 20 2 18 10% /mnt/sdb1 /dev/sdb1 10 2 8 20% /mnt/sdb1 /dev/sdb1 10 2 8 20% /mnt/sdb1 [root@localhost sdb1]\# df -h t{1,2,3,4,5} Filesystem Size Used Avail Use% Mounted on /dev/sdb1 10G 489M 9.6G 5% /mnt/sdb1 /dev/sdb1 10M 0 10M 0% /mnt/sdb1 /dev/sdb1 20M 0 20M 0% /mnt/sdb1 /dev/sdb1 10M 0 10M 0% /mnt/sdb1 /dev/sdb1 10M 0 10M 0% /mnt/sdb1 Fixes: 909110c ("f2fs: choose hardlimit when softlimit is larger than hardlimit in f2fs_statfs_project()") Signed-off-by: Chengguang Xu <cgxu519@mykernel.net> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

On a system configured to trigger a crash_kexec() reboot, when only one CPU is online and another CPU panics while starting-up, crash_smp_send_stop() will fail to send any STOP message to the other already online core, resulting in fail to freeze and registers not properly saved. Moreover even if the proper messages are sent (case CPUs > 2) it will similarly fail to account for the booting CPU when executing the final stop wait-loop, so potentially resulting in some CPU not been waited for shutdown before rebooting. A tangible effect of this behaviour can be observed when, after a panic with kexec enabled and loaded, on the following reboot triggered by kexec, the cpu that could not be successfully stopped fails to come back online: [ 362.291022] ------------[ cut here ]------------ [ 362.291525] kernel BUG at arch/arm64/kernel/cpufeature.c:886! [ 362.292023] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP [ 362.292400] Modules linked in: [ 362.292970] CPU: 3 PID: 0 Comm: swapper/3 Kdump: loaded Not tainted 5.6.0-rc4-00003-gc780b890948a torvalds#105 [ 362.293136] Hardware name: Foundation-v8A (DT) [ 362.293382] pstate: 200001c5 (nzCv dAIF -PAN -UAO) [ 362.294063] pc : has_cpuid_feature+0xf0/0x348 [ 362.294177] lr : verify_local_elf_hwcaps+0x84/0xe8 [ 362.294280] sp : ffff800011b1bf60 [ 362.294362] x29: ffff800011b1bf60 x28: 0000000000000000 [ 362.294534] x27: 0000000000000000 x26: 0000000000000000 [ 362.294631] x25: 0000000000000000 x24: ffff80001189a25c [ 362.294718] x23: 0000000000000000 x22: 0000000000000000 [ 362.294803] x21: ffff8000114aa018 x20: ffff800011156a00 [ 362.294897] x19: ffff800010c944a0 x18: 0000000000000004 [ 362.294987] x17: 0000000000000000 x16: 0000000000000000 [ 362.295073] x15: 00004e53b831ae3c x14: 00004e53b831ae3c [ 362.295165] x13: 0000000000000384 x12: 0000000000000000 [ 362.295251] x11: 0000000000000000 x10: 00400032b5503510 [ 362.295334] x9 : 0000000000000000 x8 : ffff800010c7e204 [ 362.295426] x7 : 00000000410fd0f0 x6 : 0000000000000001 [ 362.295508] x5 : 00000000410fd0f0 x4 : 0000000000000000 [ 362.295592] x3 : 0000000000000000 x2 : ffff8000100939d8 [ 362.295683] x1 : 0000000000180420 x0 : 0000000000180480 [ 362.296011] Call trace: [ 362.296257] has_cpuid_feature+0xf0/0x348 [ 362.296350] verify_local_elf_hwcaps+0x84/0xe8 [ 362.296424] check_local_cpu_capabilities+0x44/0x128 [ 362.296497] secondary_start_kernel+0xf4/0x188 [ 362.296998] Code: 52805001 72a00301 6b01001f 54000ec0 (d4210000) [ 362.298652] SMP: stopping secondary CPUs [ 362.300615] Starting crashdump kernel... [ 362.301168] Bye! [ 0.000000] Booting Linux on physical CPU 0x0000000003 [0x410fd0f0] [ 0.000000] Linux version 5.6.0-rc4-00003-gc780b890948a (crimar01@e120937-lin) (gcc version 8.3.0 (GNU Toolchain for the A-profile Architecture 8.3-2019.03 (arm-rel-8.36))) torvalds#105 SMP PREEMPT Fri Mar 6 17:00:42 GMT 2020 [ 0.000000] Machine model: Foundation-v8A [ 0.000000] earlycon: pl11 at MMIO 0x000000001c090000 (options '') [ 0.000000] printk: bootconsole [pl11] enabled ..... [ 0.138024] rcu: Hierarchical SRCU implementation. [ 0.153472] its@2f020000: unable to locate ITS domain [ 0.154078] its@2f020000: Unable to locate ITS domain [ 0.157541] EFI services will not be available. [ 0.175395] smp: Bringing up secondary CPUs ... [ 0.209182] psci: failed to boot CPU1 (-22) [ 0.209377] CPU1: failed to boot: -22 [ 0.274598] Detected PIPT I-cache on CPU2 [ 0.278707] GICv3: CPU2: found redistributor 1 region 0:0x000000002f120000 [ 0.285212] CPU2: Booted secondary processor 0x0000000001 [0x410fd0f0] [ 0.369053] Detected PIPT I-cache on CPU3 [ 0.372947] GICv3: CPU3: found redistributor 2 region 0:0x000000002f140000 [ 0.378664] CPU3: Booted secondary processor 0x0000000002 [0x410fd0f0] [ 0.401707] smp: Brought up 1 node, 3 CPUs [ 0.404057] SMP: Total of 3 processors activated. Make crash_smp_send_stop() account also for the online status of the calling CPU while evaluating how many CPUs are effectively online: this way the right number of STOPs is sent and all other stopped-cores's registers are properly saved. Fixes: 78fd584 ("arm64: kdump: implement machine_crash_shutdown()") Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Cristian Marussi <cristian.marussi@arm.com> Signed-off-by: Will Deacon <will@kernel.org>

commit f50b7da upstream. On a system configured to trigger a crash_kexec() reboot, when only one CPU is online and another CPU panics while starting-up, crash_smp_send_stop() will fail to send any STOP message to the other already online core, resulting in fail to freeze and registers not properly saved. Moreover even if the proper messages are sent (case CPUs > 2) it will similarly fail to account for the booting CPU when executing the final stop wait-loop, so potentially resulting in some CPU not been waited for shutdown before rebooting. A tangible effect of this behaviour can be observed when, after a panic with kexec enabled and loaded, on the following reboot triggered by kexec, the cpu that could not be successfully stopped fails to come back online: [ 362.291022] ------------[ cut here ]------------ [ 362.291525] kernel BUG at arch/arm64/kernel/cpufeature.c:886! [ 362.292023] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP [ 362.292400] Modules linked in: [ 362.292970] CPU: 3 PID: 0 Comm: swapper/3 Kdump: loaded Not tainted 5.6.0-rc4-00003-gc780b890948a torvalds#105 [ 362.293136] Hardware name: Foundation-v8A (DT) [ 362.293382] pstate: 200001c5 (nzCv dAIF -PAN -UAO) [ 362.294063] pc : has_cpuid_feature+0xf0/0x348 [ 362.294177] lr : verify_local_elf_hwcaps+0x84/0xe8 [ 362.294280] sp : ffff800011b1bf60 [ 362.294362] x29: ffff800011b1bf60 x28: 0000000000000000 [ 362.294534] x27: 0000000000000000 x26: 0000000000000000 [ 362.294631] x25: 0000000000000000 x24: ffff80001189a25c [ 362.294718] x23: 0000000000000000 x22: 0000000000000000 [ 362.294803] x21: ffff8000114aa018 x20: ffff800011156a00 [ 362.294897] x19: ffff800010c944a0 x18: 0000000000000004 [ 362.294987] x17: 0000000000000000 x16: 0000000000000000 [ 362.295073] x15: 00004e53b831ae3c x14: 00004e53b831ae3c [ 362.295165] x13: 0000000000000384 x12: 0000000000000000 [ 362.295251] x11: 0000000000000000 x10: 00400032b5503510 [ 362.295334] x9 : 0000000000000000 x8 : ffff800010c7e204 [ 362.295426] x7 : 00000000410fd0f0 x6 : 0000000000000001 [ 362.295508] x5 : 00000000410fd0f0 x4 : 0000000000000000 [ 362.295592] x3 : 0000000000000000 x2 : ffff8000100939d8 [ 362.295683] x1 : 0000000000180420 x0 : 0000000000180480 [ 362.296011] Call trace: [ 362.296257] has_cpuid_feature+0xf0/0x348 [ 362.296350] verify_local_elf_hwcaps+0x84/0xe8 [ 362.296424] check_local_cpu_capabilities+0x44/0x128 [ 362.296497] secondary_start_kernel+0xf4/0x188 [ 362.296998] Code: 52805001 72a00301 6b01001f 54000ec0 (d4210000) [ 362.298652] SMP: stopping secondary CPUs [ 362.300615] Starting crashdump kernel... [ 362.301168] Bye! [ 0.000000] Booting Linux on physical CPU 0x0000000003 [0x410fd0f0] [ 0.000000] Linux version 5.6.0-rc4-00003-gc780b890948a (crimar01@e120937-lin) (gcc version 8.3.0 (GNU Toolchain for the A-profile Architecture 8.3-2019.03 (arm-rel-8.36))) torvalds#105 SMP PREEMPT Fri Mar 6 17:00:42 GMT 2020 [ 0.000000] Machine model: Foundation-v8A [ 0.000000] earlycon: pl11 at MMIO 0x000000001c090000 (options '') [ 0.000000] printk: bootconsole [pl11] enabled ..... [ 0.138024] rcu: Hierarchical SRCU implementation. [ 0.153472] its@2f020000: unable to locate ITS domain [ 0.154078] its@2f020000: Unable to locate ITS domain [ 0.157541] EFI services will not be available. [ 0.175395] smp: Bringing up secondary CPUs ... [ 0.209182] psci: failed to boot CPU1 (-22) [ 0.209377] CPU1: failed to boot: -22 [ 0.274598] Detected PIPT I-cache on CPU2 [ 0.278707] GICv3: CPU2: found redistributor 1 region 0:0x000000002f120000 [ 0.285212] CPU2: Booted secondary processor 0x0000000001 [0x410fd0f0] [ 0.369053] Detected PIPT I-cache on CPU3 [ 0.372947] GICv3: CPU3: found redistributor 2 region 0:0x000000002f140000 [ 0.378664] CPU3: Booted secondary processor 0x0000000002 [0x410fd0f0] [ 0.401707] smp: Brought up 1 node, 3 CPUs [ 0.404057] SMP: Total of 3 processors activated. Make crash_smp_send_stop() account also for the online status of the calling CPU while evaluating how many CPUs are effectively online: this way the right number of STOPs is sent and all other stopped-cores's registers are properly saved. Fixes: 78fd584 ("arm64: kdump: implement machine_crash_shutdown()") Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Cristian Marussi <cristian.marussi@arm.com> Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

BugLink: https://bugs.launchpad.net/bugs/1869061 commit f50b7da upstream. On a system configured to trigger a crash_kexec() reboot, when only one CPU is online and another CPU panics while starting-up, crash_smp_send_stop() will fail to send any STOP message to the other already online core, resulting in fail to freeze and registers not properly saved. Moreover even if the proper messages are sent (case CPUs > 2) it will similarly fail to account for the booting CPU when executing the final stop wait-loop, so potentially resulting in some CPU not been waited for shutdown before rebooting. A tangible effect of this behaviour can be observed when, after a panic with kexec enabled and loaded, on the following reboot triggered by kexec, the cpu that could not be successfully stopped fails to come back online: [ 362.291022] ------------[ cut here ]------------ [ 362.291525] kernel BUG at arch/arm64/kernel/cpufeature.c:886! [ 362.292023] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP [ 362.292400] Modules linked in: [ 362.292970] CPU: 3 PID: 0 Comm: swapper/3 Kdump: loaded Not tainted 5.6.0-rc4-00003-gc780b890948a #105 [ 362.293136] Hardware name: Foundation-v8A (DT) [ 362.293382] pstate: 200001c5 (nzCv dAIF -PAN -UAO) [ 362.294063] pc : has_cpuid_feature+0xf0/0x348 [ 362.294177] lr : verify_local_elf_hwcaps+0x84/0xe8 [ 362.294280] sp : ffff800011b1bf60 [ 362.294362] x29: ffff800011b1bf60 x28: 0000000000000000 [ 362.294534] x27: 0000000000000000 x26: 0000000000000000 [ 362.294631] x25: 0000000000000000 x24: ffff80001189a25c [ 362.294718] x23: 0000000000000000 x22: 0000000000000000 [ 362.294803] x21: ffff8000114aa018 x20: ffff800011156a00 [ 362.294897] x19: ffff800010c944a0 x18: 0000000000000004 [ 362.294987] x17: 0000000000000000 x16: 0000000000000000 [ 362.295073] x15: 00004e53b831ae3c x14: 00004e53b831ae3c [ 362.295165] x13: 0000000000000384 x12: 0000000000000000 [ 362.295251] x11: 0000000000000000 x10: 00400032b5503510 [ 362.295334] x9 : 0000000000000000 x8 : ffff800010c7e204 [ 362.295426] x7 : 00000000410fd0f0 x6 : 0000000000000001 [ 362.295508] x5 : 00000000410fd0f0 x4 : 0000000000000000 [ 362.295592] x3 : 0000000000000000 x2 : ffff8000100939d8 [ 362.295683] x1 : 0000000000180420 x0 : 0000000000180480 [ 362.296011] Call trace: [ 362.296257] has_cpuid_feature+0xf0/0x348 [ 362.296350] verify_local_elf_hwcaps+0x84/0xe8 [ 362.296424] check_local_cpu_capabilities+0x44/0x128 [ 362.296497] secondary_start_kernel+0xf4/0x188 [ 362.296998] Code: 52805001 72a00301 6b01001f 54000ec0 (d4210000) [ 362.298652] SMP: stopping secondary CPUs [ 362.300615] Starting crashdump kernel... [ 362.301168] Bye! [ 0.000000] Booting Linux on physical CPU 0x0000000003 [0x410fd0f0] [ 0.000000] Linux version 5.6.0-rc4-00003-gc780b890948a (crimar01@e120937-lin) (gcc version 8.3.0 (GNU Toolchain for the A-profile Architecture 8.3-2019.03 (arm-rel-8.36))) #105 SMP PREEMPT Fri Mar 6 17:00:42 GMT 2020 [ 0.000000] Machine model: Foundation-v8A [ 0.000000] earlycon: pl11 at MMIO 0x000000001c090000 (options '') [ 0.000000] printk: bootconsole [pl11] enabled ..... [ 0.138024] rcu: Hierarchical SRCU implementation. [ 0.153472] its@2f020000: unable to locate ITS domain [ 0.154078] its@2f020000: Unable to locate ITS domain [ 0.157541] EFI services will not be available. [ 0.175395] smp: Bringing up secondary CPUs ... [ 0.209182] psci: failed to boot CPU1 (-22) [ 0.209377] CPU1: failed to boot: -22 [ 0.274598] Detected PIPT I-cache on CPU2 [ 0.278707] GICv3: CPU2: found redistributor 1 region 0:0x000000002f120000 [ 0.285212] CPU2: Booted secondary processor 0x0000000001 [0x410fd0f0] [ 0.369053] Detected PIPT I-cache on CPU3 [ 0.372947] GICv3: CPU3: found redistributor 2 region 0:0x000000002f140000 [ 0.378664] CPU3: Booted secondary processor 0x0000000002 [0x410fd0f0] [ 0.401707] smp: Brought up 1 node, 3 CPUs [ 0.404057] SMP: Total of 3 processors activated. Make crash_smp_send_stop() account also for the online status of the calling CPU while evaluating how many CPUs are effectively online: this way the right number of STOPs is sent and all other stopped-cores's registers are properly saved. Fixes: 78fd584 ("arm64: kdump: implement machine_crash_shutdown()") Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Cristian Marussi <cristian.marussi@arm.com> Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com>

…fully During system counter frequency change, the counter will stop, it takes several mS even up to 20mS to finish the frequency change, if system enters STOP mode before the frequency change done, system counter will NOT run during STOP mode, then it will case system time inaccurate and sometimes cause below RCU stall, so system can ONLY enter STOP mode after the system counter frequency change done by checking the ACK of frequency change. rtc_testapp_6 0 TINFO : Waiting 50 seconds for alarm....... fec 30be0000.ethernet eth0: Link is Down PM: suspend devices took 0.670 seconds Disabling non-boot CPUs ... Enabling non-boot CPUs ... rcu: INFO: rcu_sched self-detected stall on CPU rcu: 0-...!: (1 ticks this GP) idle=1f6/1/0x40000002 softirq=5240/5240 fqs=0 (t=4903 jiffies g=3737 q=4) rcu: rcu_sched kthread starved for 4903 jiffies! g3737 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->0 rcu: RCU grace-period kthread stack dump: rcu_sched I 0 10 2 0x00000000 [<c0d85a9c>] (__schedule) from [<c0d85e64>] (schedule+0x50/0xc4) [<c0d85e64>] (schedule) from [<c0d8b8fc>] (schedule_timeout+0x1b8/0x37c) [<c0d8b8fc>] (schedule_timeout) from [<c01b9f2c>] (rcu_gp_kthread+0x8cc/0x1678) [<c01b9f2c>] (rcu_gp_kthread) from [<c015f12c>] (kthread+0x114/0x14c) [<c015f12c>] (kthread) from [<c01010b4>] (ret_from_fork+0x14/0x20) Exception stack(0xd80fdfb0 to 0xd80fdff8) dfa0: 00000000 00000000 00000000 00000000 dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 NMI backtrace for cpu 0 CPU: 0 PID: 834 Comm: rtc_testapp_6 Not tainted 5.4.0-rc7-03214-g56a9ca3 Freescale#105 Hardware name: Freescale i.MX7 Dual (Device Tree) [<c01126e4>] (unwind_backtrace) from [<c010cf3c>] (show_stack+0x10/0x14) [<c010cf3c>] (show_stack) from [<c0d691dc>] (dump_stack+0xe4/0x118) [<c0d691dc>] (dump_stack) from [<c0d70678>] (nmi_cpu_backtrace+0xac/0xbc) [<c0d70678>] (nmi_cpu_backtrace) from [<c0d70768>] (nmi_trigger_cpumask_backtrace+0xe0/0x130) [<c0d70768>] (nmi_trigger_cpumask_backtrace) from [<c01be188>] (rcu_dump_cpu_stacks+0x9c/0xd8) [<c01be188>] (rcu_dump_cpu_stacks) from [<c01bd254>] (rcu_sched_clock_irq+0x940/0xbec) [<c01bd254>] (rcu_sched_clock_irq) from [<c01c5758>] (update_process_times+0x2c/0x54) [<c01c5758>] (update_process_times) from [<c01d9cf0>] (tick_sched_timer+0x5c/0xc0) [<c01d9cf0>] (tick_sched_timer) from [<c01c6bf8>] (__hrtimer_run_queues+0x140/0x548) [<c01c6bf8>] (__hrtimer_run_queues) from [<c01c792c>] (hrtimer_interrupt+0x134/0x2bc) [<c01c792c>] (hrtimer_interrupt) from [<c097eb00>] (arch_timer_handler_phys+0x2c/0x34) [<c097eb00>] (arch_timer_handler_phys) from [<c01a6b1c>] (handle_percpu_devid_irq+0xd4/0x384) [<c01a6b1c>] (handle_percpu_devid_irq) from [<c01a072c>] (generic_handle_irq+0x20/0x34) [<c01a072c>] (generic_handle_irq) from [<c01a0d34>] (__handle_domain_irq+0x64/0xe0) [<c01a0d34>] (__handle_domain_irq) from [<c0548510>] (gic_handle_irq+0x4c/0xa0) [<c0548510>] (gic_handle_irq) from [<c0101a70>] (__irq_svc+0x70/0x98) Exception stack(0xd8cedd00 to 0xd8cedd48) dd00: 00000001 d88a5d20 00000000 200a0013 00000000 00000000 c1b3f6f0 0000002a dd20: d8cec000 00000000 c1b3dbf8 c1b3d6f8 c16c82bc d8cedd50 c018fe50 c019dd68 dd40: 200a0013 ffffffff [<c0101a70>] (__irq_svc) from [<c019dd68>] (console_unlock+0x4e0/0x634) [<c019dd68>] (console_unlock) from [<c019f6c8>] (vprintk_emit+0xf4/0x2d0) [<c019f6c8>] (vprintk_emit) from [<c019f8c8>] (vprintk_default+0x24/0x2c) [<c019f8c8>] (vprintk_default) from [<c019fe9c>] (printk+0x2c/0x54) [<c019fe9c>] (printk) from [<c013b560>] (enable_nonboot_cpus+0x38/0x2cc) [<c013b560>] (enable_nonboot_cpus) from [<c019b4d0>] (suspend_devices_and_enter+0x374/0xa44) [<c019b4d0>] (suspend_devices_and_enter) from [<c019be8c>] (pm_suspend+0x2ec/0x3d0) [<c019be8c>] (pm_suspend) from [<c019a088>] (state_store+0x68/0xc8) [<c019a088>] (state_store) from [<c033305c>] (kernfs_fop_write+0xfc/0x1e0) [<c033305c>] (kernfs_fop_write) from [<c029d278>] (__vfs_write+0x2c/0x1d0) [<c029d278>] (__vfs_write) from [<c02a0184>] (vfs_write+0xa0/0x180) [<c02a0184>] (vfs_write) from [<c02a03e0>] (ksys_write+0x5c/0xd8) [<c02a03e0>] (ksys_write) from [<c0101000>] (ret_fast_syscall+0x0/0x28) Exception stack(0xd8cedfa8 to 0xd8cedff0) dfa0: 00036294 00021590 00000004 bef5cd29 00000007 00000000 dfc0: 00036294 00021590 b6fc0d20 00000004 00000000 00000000 b6fc2fa4 00000000 dfe0: 00000004 bef5c8e8 b6f35d4f b6ec1d16 CPU1 is up imx6q-pcie 33800000.pcie: Phy link never came up imx6q-pcie 33800000.pcie: pcie link is down after resume. mmc1: queuing unknown CIS tuple 0x80 (2 bytes) mmc1: queuing unknown CIS tuple 0x80 (7 bytes) mmc1: queuing unknown CIS tuple 0x80 (6 bytes) PM: resume devices took 0.220 seconds OOM killer enabled. Restarting tasks ... done. PM: suspend exit Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Reviewed-by: Jacky Bai <ping.bai@nxp.com>

Update 5.4-2.1.x-imx to v5.4.58 from stable + cherry-pick merge fix for 5.4.52

Add a definition of DAB/FM sound card: - SPI on ECSPI1, reset on GPIO05_I09 (torvalds#105) - DAI link on SAI6 - bit & ws clocks from ADC - SAI2 enabled to provide MCLK for ADC, but bit & ws clocks slave Based on: POC by Tony Gao <tony.gao@streamunlimited.com> For this to work reliably, only the ADC should provide I2S clocks, SAI1, SAI2 and SAI6 being slaves on RX side. All three, or at least two (depending on AUX/HDMI_SWITCH) are connected to ADC in StreamKit 1955. At the same time, SAI2 has to provide continuous master clock for ADC. Signed-off-by: Andriy Danylovskyy <andriy.danylovskyy@streamunlimited.com>

[ Upstream commit 25934fc ] On PREEMPT_RT kernel and KASAN is enabled. the kasan_record_aux_stack() may call alloc_pages(), and the rt-spinlock will be acquired, if currently in atomic context, will trigger warning: BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:46 in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 239, name: bootlogd Preemption disabled at: [<ffffffffbab1a531>] rt_mutex_slowunlock+0xa1/0x4e0 CPU: 3 PID: 239 Comm: bootlogd Tainted: G W 5.17.1-rt17-yocto-preempt-rt+ torvalds#105 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014 Call Trace: __might_resched.cold+0x13b/0x173 rt_spin_lock+0x5b/0xf0 get_page_from_freelist+0x20c/0x1610 __alloc_pages+0x25e/0x5e0 __stack_depot_save+0x3c0/0x4a0 kasan_save_stack+0x3a/0x50 __kasan_record_aux_stack+0xb6/0xc0 kasan_record_aux_stack+0xe/0x10 irq_work_queue_on+0x6a/0x1c0 pull_rt_task+0x631/0x6b0 do_balance_callbacks+0x56/0x80 __balance_callbacks+0x63/0x90 rt_mutex_setprio+0x349/0x880 rt_mutex_slowunlock+0x22a/0x4e0 rt_spin_unlock+0x49/0x80 uart_write+0x186/0x2b0 do_output_char+0x2e9/0x3a0 n_tty_write+0x306/0x800 file_tty_write.isra.0+0x2af/0x450 tty_write+0x22/0x30 new_sync_write+0x27c/0x3a0 vfs_write+0x3f7/0x5d0 ksys_write+0xd9/0x180 __x64_sys_write+0x43/0x50 do_syscall_64+0x44/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae Fix it by using kasan_record_aux_stack_noalloc() to avoid the call to alloc_pages(). Link: https://lkml.kernel.org/r/20220402142555.2699582-1-qiang1.zhang@intel.com Signed-off-by: Zqiang <qiang1.zhang@intel.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Konovalov <andreyknvl@gmail.com> Cc: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>

Reported by checkpatch: security/selinux/nlmsgtab.c --------------------------- ERROR: that open brace { should be on the previous line torvalds#29: FILE: security/selinux/nlmsgtab.c:29: +static const struct nlmsg_perm nlmsg_route_perms[] = +{ ERROR: that open brace { should be on the previous line torvalds#97: FILE: security/selinux/nlmsgtab.c:97: +static const struct nlmsg_perm nlmsg_tcpdiag_perms[] = +{ ERROR: that open brace { should be on the previous line torvalds#105: FILE: security/selinux/nlmsgtab.c:105: +static const struct nlmsg_perm nlmsg_xfrm_perms[] = +{ ERROR: that open brace { should be on the previous line torvalds#134: FILE: security/selinux/nlmsgtab.c:134: +static const struct nlmsg_perm nlmsg_audit_perms[] = +{ security/selinux/ss/policydb.c ------------------------------ ERROR: that open brace { should be on the previous line torvalds#318: FILE: security/selinux/ss/policydb.c:318: +static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) = +{ ERROR: that open brace { should be on the previous line torvalds#674: FILE: security/selinux/ss/policydb.c:674: +static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) = +{ ERROR: that open brace { should be on the previous line #1643: FILE: security/selinux/ss/policydb.c:1643: +static int (*read_f[SYM_NUM]) (struct policydb *p, struct symtab *s, void *fp) = +{ ERROR: that open brace { should be on the previous line #3246: FILE: security/selinux/ss/policydb.c:3246: + void *datap) = +{ Signed-off-by: Christian Göttsche <cgzones@googlemail.com>

Reported by checkpatch: security/selinux/nlmsgtab.c --------------------------- ERROR: that open brace { should be on the previous line torvalds#29: FILE: security/selinux/nlmsgtab.c:29: +static const struct nlmsg_perm nlmsg_route_perms[] = +{ ERROR: that open brace { should be on the previous line torvalds#97: FILE: security/selinux/nlmsgtab.c:97: +static const struct nlmsg_perm nlmsg_tcpdiag_perms[] = +{ ERROR: that open brace { should be on the previous line torvalds#105: FILE: security/selinux/nlmsgtab.c:105: +static const struct nlmsg_perm nlmsg_xfrm_perms[] = +{ ERROR: that open brace { should be on the previous line torvalds#134: FILE: security/selinux/nlmsgtab.c:134: +static const struct nlmsg_perm nlmsg_audit_perms[] = +{ security/selinux/ss/policydb.c ------------------------------ ERROR: that open brace { should be on the previous line torvalds#318: FILE: security/selinux/ss/policydb.c:318: +static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) = +{ ERROR: that open brace { should be on the previous line torvalds#674: FILE: security/selinux/ss/policydb.c:674: +static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) = +{ ERROR: that open brace { should be on the previous line #1643: FILE: security/selinux/ss/policydb.c:1643: +static int (*read_f[SYM_NUM]) (struct policydb *p, struct symtab *s, void *fp) = +{ ERROR: that open brace { should be on the previous line #3246: FILE: security/selinux/ss/policydb.c:3246: + void *datap) = +{ Signed-off-by: Christian Göttsche <cgzones@googlemail.com> Signed-off-by: Paul Moore <paul@paul-moore.com>

Broadcom 4377 controllers found in Apple x86 Macs with the T2 chip claim to support extended scanning when querying support states, < HCI Command: LE Read Supported St.. (0x08|0x001c) plen 0 #27 [hci0] 2.971839 > HCI Event: Command Complete (0x0e) plen 12 #28 [hci0] 2.972730 LE Read Supported States (0x08|0x001c) ncmd 1 Status: Success (0x00) States: 0x000003ffffffffff [...] LE Set Extended Scan Parameters (Octet 37 - Bit 5) LE Set Extended Scan Enable (Octet 37 - Bit 6) [...] , but then fail to actually implement the extended scanning: < HCI Command: LE Set Extended Sca.. (0x08|0x0041) plen 8 #105 [hci0] 5.460776 Own address type: Random (0x01) Filter policy: Accept all advertisement (0x00) PHYs: 0x01 Entry 0: LE 1M Type: Active (0x01) Interval: 11.250 msec (0x0012) Window: 11.250 msec (0x0012) > HCI Event: Command Complete (0x0e) plen 4 #106 [hci0] 5.461777 LE Set Extended Scan Parameters (0x08|0x0041) ncmd 1 Signed-off-by: Sven Peter <sven@svenpeter.dev>

Broadcom 4377 controllers found in Apple x86 Macs with the T2 chip claim to support extended scanning when querying supported states, < HCI Command: LE Read Supported St.. (0x08|0x001c) plen 0 #27 [hci0] 2.971839 > HCI Event: Command Complete (0x0e) plen 12 #28 [hci0] 2.972730 LE Read Supported States (0x08|0x001c) ncmd 1 Status: Success (0x00) States: 0x000003ffffffffff [...] LE Set Extended Scan Parameters (Octet 37 - Bit 5) LE Set Extended Scan Enable (Octet 37 - Bit 6) [...] , but then fail to actually implement the extended scanning: < HCI Command: LE Set Extended Sca.. (0x08|0x0041) plen 8 #105 [hci0] 5.460776 Own address type: Random (0x01) Filter policy: Accept all advertisement (0x00) PHYs: 0x01 Entry 0: LE 1M Type: Active (0x01) Interval: 11.250 msec (0x0012) Window: 11.250 msec (0x0012) > HCI Event: Command Complete (0x0e) plen 4 #106 [hci0] 5.461777 LE Set Extended Scan Parameters (0x08|0x0041) ncmd 1 Status: Unknown HCI Command (0x01) Signed-off-by: Sven Peter <sven@svenpeter.dev>

Broadcom 4377 controllers found in Apple x86 Macs with the T2 chip claim to support extended scanning when querying supported states, < HCI Command: LE Read Supported St.. (0x08|0x001c) plen 0 torvalds#27 [hci0] 2.971839 > HCI Event: Command Complete (0x0e) plen 12 torvalds#28 [hci0] 2.972730 LE Read Supported States (0x08|0x001c) ncmd 1 Status: Success (0x00) States: 0x000003ffffffffff [...] LE Set Extended Scan Parameters (Octet 37 - Bit 5) LE Set Extended Scan Enable (Octet 37 - Bit 6) [...] , but then fail to actually implement the extended scanning: < HCI Command: LE Set Extended Sca.. (0x08|0x0041) plen 8 torvalds#105 [hci0] 5.460776 Own address type: Random (0x01) Filter policy: Accept all advertisement (0x00) PHYs: 0x01 Entry 0: LE 1M Type: Active (0x01) Interval: 11.250 msec (0x0012) Window: 11.250 msec (0x0012) > HCI Event: Command Complete (0x0e) plen 4 torvalds#106 [hci0] 5.461777 LE Set Extended Scan Parameters (0x08|0x0041) ncmd 1 Status: Unknown HCI Command (0x01) Signed-off-by: Sven Peter <sven@svenpeter.dev>

Broadcom 4377 controllers found in Apple x86 Macs with the T2 chip claim to support extended scanning when querying supported states, < HCI Command: LE Read Supported St.. (0x08|0x001c) plen 0 #27 [hci0] 2.971839 > HCI Event: Command Complete (0x0e) plen 12 #28 [hci0] 2.972730 LE Read Supported States (0x08|0x001c) ncmd 1 Status: Success (0x00) States: 0x000003ffffffffff [...] LE Set Extended Scan Parameters (Octet 37 - Bit 5) LE Set Extended Scan Enable (Octet 37 - Bit 6) [...] , but then fail to actually implement the extended scanning: < HCI Command: LE Set Extended Sca.. (0x08|0x0041) plen 8 #105 [hci0] 5.460776 Own address type: Random (0x01) Filter policy: Accept all advertisement (0x00) PHYs: 0x01 Entry 0: LE 1M Type: Active (0x01) Interval: 11.250 msec (0x0012) Window: 11.250 msec (0x0012) > HCI Event: Command Complete (0x0e) plen 4 #106 [hci0] 5.461777 LE Set Extended Scan Parameters (0x08|0x0041) ncmd 1 Status: Unknown HCI Command (0x01) Signed-off-by: Sven Peter <sven@svenpeter.dev>

Broadcom 4377 controllers found in Apple x86 Macs with the T2 chip claim to support extended scanning when querying supported states, < HCI Command: LE Read Supported St.. (0x08|0x001c) plen 0 torvalds#27 [hci0] 2.971839 > HCI Event: Command Complete (0x0e) plen 12 torvalds#28 [hci0] 2.972730 LE Read Supported States (0x08|0x001c) ncmd 1 Status: Success (0x00) States: 0x000003ffffffffff [...] LE Set Extended Scan Parameters (Octet 37 - Bit 5) LE Set Extended Scan Enable (Octet 37 - Bit 6) [...] , but then fail to actually implement the extended scanning: < HCI Command: LE Set Extended Sca.. (0x08|0x0041) plen 8 torvalds#105 [hci0] 5.460776 Own address type: Random (0x01) Filter policy: Accept all advertisement (0x00) PHYs: 0x01 Entry 0: LE 1M Type: Active (0x01) Interval: 11.250 msec (0x0012) Window: 11.250 msec (0x0012) > HCI Event: Command Complete (0x0e) plen 4 torvalds#106 [hci0] 5.461777 LE Set Extended Scan Parameters (0x08|0x0041) ncmd 1 Status: Unknown HCI Command (0x01) Signed-off-by: Sven Peter <sven@svenpeter.dev>

…tack On PREEMPT_RT kernel and KASAN is enabled. the kasan_record_aux_stack() may call alloc_pages(), and the rt-spinlock will be acquired, if currently in atomic context, will trigger warning: BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:46 in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 239, name: bootlogd Preemption disabled at: [<ffffffffbab1a531>] rt_mutex_slowunlock+0xa1/0x4e0 CPU: 3 PID: 239 Comm: bootlogd Tainted: G W 5.17.1-rt17-yocto-preempt-rt+ torvalds#105 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014 Call Trace: __might_resched.cold+0x13b/0x173 rt_spin_lock+0x5b/0xf0 get_page_from_freelist+0x20c/0x1610 __alloc_pages+0x25e/0x5e0 __stack_depot_save+0x3c0/0x4a0 kasan_save_stack+0x3a/0x50 __kasan_record_aux_stack+0xb6/0xc0 kasan_record_aux_stack+0xe/0x10 irq_work_queue_on+0x6a/0x1c0 pull_rt_task+0x631/0x6b0 do_balance_callbacks+0x56/0x80 __balance_callbacks+0x63/0x90 rt_mutex_setprio+0x349/0x880 rt_mutex_slowunlock+0x22a/0x4e0 rt_spin_unlock+0x49/0x80 uart_write+0x186/0x2b0 do_output_char+0x2e9/0x3a0 n_tty_write+0x306/0x800 file_tty_write.isra.0+0x2af/0x450 tty_write+0x22/0x30 new_sync_write+0x27c/0x3a0 vfs_write+0x3f7/0x5d0 ksys_write+0xd9/0x180 __x64_sys_write+0x43/0x50 do_syscall_64+0x44/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae Fix it by using kasan_record_aux_stack_noalloc() to avoid the call to alloc_pages(). Link: https://lkml.kernel.org/r/20220402142555.2699582-1-qiang1.zhang@intel.com Signed-off-by: Zqiang <qiang1.zhang@intel.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Konovalov <andreyknvl@gmail.com> Cc: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Bug: 244106580 Change-Id: I8d3ae4ec15e5b36dd307d13a957d36aa15365a94 (cherry picked from commit 25934fc) Signed-off-by: Yee Lee<yee.lee@mediatek.com>

…ings to the I2C framework for slave device initialization.' (torvalds#105) from ast-540-i2c-slave_dev_init-cl634 into RISCV-Linux-6.1 Reviewed-on: https://gitea.andestech.com/RD-SW/linux/pulls/105 Reviewed-by: Dylan Dai-Rong Jhong <dylan@andestech.com> Reviewed-by: Tim Shih-Ting OuYang <tim609@andestech.com> Reviewed-by: Charles Ci-Jyun Wu <dminus@andestech.com>

Fix fallback

Update acct.c

f3dff45

hosembafer closed this Aug 7, 2014

iaguis pushed a commit to kinvolk/linux that referenced this pull request Feb 6, 2018

Merge pull request torvalds#105 from bgilbert/v4.14-rc8-coreos

43a6467

Rebase 4.14-rc7 patches onto 4.14-rc8

ricardosalveti pushed a commit to ricardosalveti/linux that referenced this pull request Aug 28, 2020

Merge pull request torvalds#105 from zandrey/5.4-2.1.x-imx

3655b58

Update 5.4-2.1.x-imx to v5.4.58 from stable + cherry-pick merge fix for 5.4.52

logic10492 pushed a commit to logic10492/linux-amd-zen2 that referenced this pull request Jan 18, 2024

Merge pull request torvalds#105 from sched-ext/fix_fallback

902d364

Fix fallback

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Update acct.c #105

Update acct.c #105

hosembafer commented Jun 30, 2014

Update acct.c #105

Update acct.c #105

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hosembafer commented Jun 30, 2014