Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
======================================================= [ INFO: possible circular locking dependency detected ] 3.0.0-rc3+ raspberrypi#26 ------------------------------------------------------- ip/1104 is trying to acquire lock: (local_softirq_lock){+.+...}, at: [<ffffffff81056d12>] __local_lock+0x25/0x68 but task is already holding lock: (sk_lock-AF_INET){+.+...}, at: [<ffffffff81433308>] lock_sock+0x10/0x12 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (sk_lock-AF_INET){+.+...}: [<ffffffff810836e5>] lock_acquire+0x103/0x12e [<ffffffff813e2781>] lock_sock_nested+0x82/0x92 [<ffffffff81433308>] lock_sock+0x10/0x12 [<ffffffff81433afa>] tcp_close+0x1b/0x355 [<ffffffff81453c99>] inet_release+0xc3/0xcd [<ffffffff813dff3f>] sock_release+0x1f/0x74 [<ffffffff813dffbb>] sock_close+0x27/0x2b [<ffffffff81129c63>] fput+0x11d/0x1e3 [<ffffffff81126577>] filp_close+0x70/0x7b [<ffffffff8112667a>] sys_close+0xf8/0x13d [<ffffffff814ae882>] system_call_fastpath+0x16/0x1b -> #0 (local_softirq_lock){+.+...}: [<ffffffff81082ecc>] __lock_acquire+0xacc/0xdc8 [<ffffffff810836e5>] lock_acquire+0x103/0x12e [<ffffffff814a7e40>] _raw_spin_lock+0x3b/0x4a [<ffffffff81056d12>] __local_lock+0x25/0x68 [<ffffffff81056d8b>] local_bh_disable+0x36/0x3b [<ffffffff814a7fc4>] _raw_write_lock_bh+0x16/0x4f [<ffffffff81433c38>] tcp_close+0x159/0x355 [<ffffffff81453c99>] inet_release+0xc3/0xcd [<ffffffff813dff3f>] sock_release+0x1f/0x74 [<ffffffff813dffbb>] sock_close+0x27/0x2b [<ffffffff81129c63>] fput+0x11d/0x1e3 [<ffffffff81126577>] filp_close+0x70/0x7b [<ffffffff8112667a>] sys_close+0xf8/0x13d [<ffffffff814ae882>] system_call_fastpath+0x16/0x1b other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sk_lock-AF_INET); lock(local_softirq_lock); lock(sk_lock-AF_INET); lock(local_softirq_lock); *** DEADLOCK *** 1 lock held by ip/1104: #0: (sk_lock-AF_INET){+.+...}, at: [<ffffffff81433308>] lock_sock+0x10/0x12 stack backtrace: Pid: 1104, comm: ip Not tainted 3.0.0-rc3+ raspberrypi#26 Call Trace: [<ffffffff81081649>] print_circular_bug+0x1f8/0x209 [<ffffffff81082ecc>] __lock_acquire+0xacc/0xdc8 [<ffffffff81056d12>] ? __local_lock+0x25/0x68 [<ffffffff810836e5>] lock_acquire+0x103/0x12e [<ffffffff81056d12>] ? __local_lock+0x25/0x68 [<ffffffff81046c75>] ? get_parent_ip+0x11/0x41 [<ffffffff814a7e40>] _raw_spin_lock+0x3b/0x4a [<ffffffff81056d12>] ? __local_lock+0x25/0x68 [<ffffffff81046c8c>] ? get_parent_ip+0x28/0x41 [<ffffffff81056d12>] __local_lock+0x25/0x68 [<ffffffff81056d8b>] local_bh_disable+0x36/0x3b [<ffffffff81433308>] ? lock_sock+0x10/0x12 [<ffffffff814a7fc4>] _raw_write_lock_bh+0x16/0x4f [<ffffffff81433c38>] tcp_close+0x159/0x355 [<ffffffff81453c99>] inet_release+0xc3/0xcd [<ffffffff813dff3f>] sock_release+0x1f/0x74 [<ffffffff813dffbb>] sock_close+0x27/0x2b [<ffffffff81129c63>] fput+0x11d/0x1e3 [<ffffffff81126577>] filp_close+0x70/0x7b [<ffffffff8112667a>] sys_close+0xf8/0x13d [<ffffffff814ae882>] system_call_fastpath+0x16/0x1b Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
- Loading branch information