lkl: add Ubuntu installation instructions #38
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Signed-off-by: Patrick Collins <pscollins@google.com>
tavip
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that referenced
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Jan 19, 2016
lkl: add Ubuntu installation instructions
|
Merged, thanks Patrick! |
thehajime
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to libos-nuse/lkl-linux
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Dec 13, 2016
When locking a GPIO line as IRQ, we go to lengths to double-check that the line is really set as input before marking it as used for IRQ. This is not good on GPIO chips that can sleep, because this function is called in IRQ-safe context. Just skip this if it can't be checked quickly. Currently this happens on sleeping expanders such as STMPE or TC3589x: BUG: scheduling while atomic: swapper/1/0x00000002 Modules linked in: CPU: 0 PID: 1 Comm: swapper Not tainted 4.9.0-rc1+ lkl#38 Hardware name: Nomadik STn8815 [<c000f2e0>] (unwind_backtrace) from [<c000d244>] (show_stack+0x10/0x14) [<c000d244>] (show_stack) from [<c0037b78>] (__schedule_bug+0x54/0x80) [<c0037b78>] (__schedule_bug) from [<c042df14>] (__schedule+0x3a0/0x460) [<c042df14>] (__schedule) from [<c042e028>] (schedule+0x54/0xb8) (...) This patch fixes that problem and relies on the direction read from the chip when it was added. Cc: stable@vger.kernel.org Fixes: 9c10280 ("gpio: flush direction status in gpiochip_lock_as_irq()") Cc: Patrice Chotard <patrice.chotard@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
tavip
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to tavip/linux
that referenced
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May 2, 2018
Documentation: teaching: lectures: smp: small improvements and fixes
retrage
pushed a commit
to retrage/linux
that referenced
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Dec 14, 2018
syzbot caught an infinite recursion in nsh_gso_segment().
Problem here is that we need to make sure the NSH header is of
reasonable length.
BUG: MAX_LOCK_DEPTH too low!
turning off the locking correctness validator.
depth: 48 max: 48!
48 locks held by syz-executor0/10189:
#0: (ptrval) (rcu_read_lock_bh){....}, at: __dev_queue_xmit+0x30f/0x34c0 net/core/dev.c:3517
#1: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
#1: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
#2: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
#2: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
#3: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
#3: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
#4: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
#4: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#5: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#5: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#6: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#6: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#7: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#7: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#8: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#8: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#9: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#9: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#10: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#10: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#11: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#11: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#12: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#12: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#13: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#13: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#14: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#14: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#15: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#15: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#16: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#16: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#17: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#17: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#18: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#18: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#19: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#19: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#20: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#20: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#21: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#21: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#22: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#22: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#23: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#23: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#24: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#24: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#25: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#25: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#26: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#26: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#27: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#27: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#28: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#28: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#29: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#29: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#30: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#30: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#31: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#31: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
dccp_close: ABORT with 65423 bytes unread
lkl#32: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#32: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#33: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#33: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#34: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#34: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#35: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#35: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#36: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#36: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#37: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#37: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#38: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#38: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#39: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#39: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#40: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#40: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#41: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#41: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#42: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#42: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#43: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#43: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#44: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#44: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#45: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#45: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#46: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#46: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
lkl#47: (ptrval) (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline]
lkl#47: (ptrval) (rcu_read_lock){....}, at: skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
INFO: lockdep is turned off.
CPU: 1 PID: 10189 Comm: syz-executor0 Not tainted 4.17.0-rc2+ lkl#26
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1b9/0x294 lib/dump_stack.c:113
__lock_acquire+0x1788/0x5140 kernel/locking/lockdep.c:3449
lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920
rcu_lock_acquire include/linux/rcupdate.h:246 [inline]
rcu_read_lock include/linux/rcupdate.h:632 [inline]
skb_mac_gso_segment+0x25b/0x720 net/core/dev.c:2789
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
nsh_gso_segment+0x405/0xb60 net/nsh/nsh.c:107
skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
__skb_gso_segment+0x3bb/0x870 net/core/dev.c:2865
skb_gso_segment include/linux/netdevice.h:4025 [inline]
validate_xmit_skb+0x54d/0xd90 net/core/dev.c:3118
validate_xmit_skb_list+0xbf/0x120 net/core/dev.c:3168
sch_direct_xmit+0x354/0x11e0 net/sched/sch_generic.c:312
qdisc_restart net/sched/sch_generic.c:399 [inline]
__qdisc_run+0x741/0x1af0 net/sched/sch_generic.c:410
__dev_xmit_skb net/core/dev.c:3243 [inline]
__dev_queue_xmit+0x28ea/0x34c0 net/core/dev.c:3551
dev_queue_xmit+0x17/0x20 net/core/dev.c:3616
packet_snd net/packet/af_packet.c:2951 [inline]
packet_sendmsg+0x40f8/0x6070 net/packet/af_packet.c:2976
sock_sendmsg_nosec net/socket.c:629 [inline]
sock_sendmsg+0xd5/0x120 net/socket.c:639
__sys_sendto+0x3d7/0x670 net/socket.c:1789
__do_sys_sendto net/socket.c:1801 [inline]
__se_sys_sendto net/socket.c:1797 [inline]
__x64_sys_sendto+0xe1/0x1a0 net/socket.c:1797
do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Fixes: c411ed8 ("nsh: add GSO support")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jiri Benc <jbenc@redhat.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Acked-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
thehajime
referenced
this pull request
in thehajime/linux
Aug 4, 2022
If GPU components have failed to bind, shutdown callback would fail with the following backtrace. Add safeguard check to stop that oops from happening and allow the board to reboot. [ 66.617046] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 [ 66.626066] Mem abort info: [ 66.628939] ESR = 0x96000006 [ 66.632088] EC = 0x25: DABT (current EL), IL = 32 bits [ 66.637542] SET = 0, FnV = 0 [ 66.640688] EA = 0, S1PTW = 0 [ 66.643924] Data abort info: [ 66.646889] ISV = 0, ISS = 0x00000006 [ 66.650832] CM = 0, WnR = 0 [ 66.653890] user pgtable: 4k pages, 48-bit VAs, pgdp=0000000107f81000 [ 66.660505] [0000000000000000] pgd=0000000100bb2003, p4d=0000000100bb2003, pud=0000000100897003, pmd=0000000000000000 [ 66.671398] Internal error: Oops: 96000006 [#1] PREEMPT SMP [ 66.677115] Modules linked in: [ 66.680261] CPU: 6 PID: 352 Comm: reboot Not tainted 5.11.0-rc2-00309-g79e3faa756b2 #38 [ 66.688473] Hardware name: Qualcomm Technologies, Inc. Robotics RB5 (DT) [ 66.695347] pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--) [ 66.701507] pc : msm_atomic_commit_tail+0x78/0x4e0 [ 66.706437] lr : commit_tail+0xa4/0x184 [ 66.710381] sp : ffff8000108f3af0 [ 66.713791] x29: ffff8000108f3af0 x28: ffff418c44337000 [ 66.719242] x27: 0000000000000000 x26: ffff418c40a24490 [ 66.724693] x25: ffffd3a842a4f1a0 x24: 0000000000000008 [ 66.730146] x23: ffffd3a84313f030 x22: ffff418c444ce000 [ 66.735598] x21: ffff418c408a4980 x20: 0000000000000000 [ 66.741049] x19: 0000000000000000 x18: ffff800010710fbc [ 66.746500] x17: 000000000000000c x16: 0000000000000001 [ 66.751954] x15: 0000000000010008 x14: 0000000000000068 [ 66.757405] x13: 0000000000000001 x12: 0000000000000000 [ 66.762855] x11: 0000000000000001 x10: 00000000000009b0 [ 66.768306] x9 : ffffd3a843192000 x8 : ffff418c44337000 [ 66.773757] x7 : 0000000000000000 x6 : 00000000a401b34e [ 66.779210] x5 : 00ffffffffffffff x4 : 0000000000000000 [ 66.784660] x3 : 0000000000000000 x2 : ffff418c444ce000 [ 66.790111] x1 : ffffd3a841dce530 x0 : ffff418c444cf000 [ 66.795563] Call trace: [ 66.798075] msm_atomic_commit_tail+0x78/0x4e0 [ 66.802633] commit_tail+0xa4/0x184 [ 66.806217] drm_atomic_helper_commit+0x160/0x390 [ 66.811051] drm_atomic_commit+0x4c/0x60 [ 66.815082] drm_atomic_helper_disable_all+0x1f4/0x210 [ 66.820355] drm_atomic_helper_shutdown+0x80/0x130 [ 66.825276] msm_pdev_shutdown+0x14/0x20 [ 66.829303] platform_shutdown+0x28/0x40 [ 66.833330] device_shutdown+0x158/0x330 [ 66.837357] kernel_restart+0x40/0xa0 [ 66.841122] __do_sys_reboot+0x228/0x250 [ 66.845148] __arm64_sys_reboot+0x28/0x34 [ 66.849264] el0_svc_common.constprop.0+0x74/0x190 [ 66.854187] do_el0_svc+0x24/0x90 [ 66.857595] el0_svc+0x14/0x20 [ 66.860739] el0_sync_handler+0x1a4/0x1b0 [ 66.864858] el0_sync+0x174/0x180 [ 66.868269] Code: 1ac020a0 2a000273 eb02007f 54ffff01 (f9400285) [ 66.874525] ---[ end trace 20dedb2a3229fec8 ]--- Fixes: 9d5cbf5 ("drm/msm: add shutdown support for display platform_driver") Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Fabio Estevam <festevam@gmail.com> Signed-off-by: Rob Clark <robdclark@chromium.org>
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This closes #37.
Signed-off-by: Patrick Collins pscollins@google.com