Hi Emmanuel,
The kernel compiled from commit b35032f ("iwlwifi: don't configure a
txq that is being disabled") in
git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi.git master
triggers a kernel oops below.
That particular commit may well not be the root cause. I'm just hoping
you may have better idea which recent change may be relevant.
[ 48.050140] iwldvm: Intel(R) Wireless WiFi Link AGN driver for Linux, in-tree:
[ 48.195291] iwldvm: Copyright(c) 2003-2012 Intel Corporation
[ 48.269132] ------------[ cut here ]------------
[ 48.272840] WARNING: at /c/kernel-tests/usb/kernel/mutex.c:198 __mutex_lock_common+0xf6/0x387()
[ 48.272840] Hardware name: Bochs
[ 48.272840] Modules linked in:
[ 48.272840] Pid: 1, comm: swapper/0 Not tainted 3.5.0-rc1+ #1
[ 48.272840] Call Trace:
[ 48.272840] [<ffffffff81090271>] warn_slowpath_common+0x83/0x9c
[ 48.272840] [<ffffffff820b2afb>] ? iwl_opmode_register+0x23/0xbb
[ 48.272840] [<ffffffff810902a4>] warn_slowpath_null+0x1a/0x1c
[ 48.272840] [<ffffffff82e93011>] __mutex_lock_common+0xf6/0x387
[ 48.272840] [<ffffffff820b2afb>] ? iwl_opmode_register+0x23/0xbb
[ 48.272840] [<ffffffff82e93615>] ? __mutex_unlock_slowpath+0x116/0x126
[ 48.272840] [<ffffffff810ddb01>] ? trace_hardirqs_on_caller+0x123/0x17f
[ 48.272840] [<ffffffff82e933b1>] mutex_lock_nested+0x40/0x45
[ 48.272840] [<ffffffff820b2afb>] iwl_opmode_register+0x23/0xbb
[ 48.272840] [<ffffffff84660e4f>] ? mwl8k_driver_init+0x1b/0x1b
[ 48.272840] [<ffffffff84660ea1>] iwl_init+0x52/0x73
[ 48.272840] [<ffffffff81002099>] do_one_initcall+0x7f/0x13a
[ 48.272840] [<ffffffff84603d39>] kernel_init+0x170/0x1f8
[ 48.272840] [<ffffffff84603590>] ? do_early_param+0x8c/0x8c
[ 48.272840] [<ffffffff82e9db74>] kernel_thread_helper+0x4/0x10
[ 48.272840] [<ffffffff82e95db0>] ? retint_restore_args+0x13/0x13
[ 48.272840] [<ffffffff84603bc9>] ? start_kernel+0x3e7/0x3e7
[ 48.272840] [<ffffffff82e9db70>] ? gs_change+0x13/0x13
[ 48.272840] ---[ end trace 695977a38adc57f4 ]---
[ 48.272840] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 48.272840] IP: [<ffffffff816c0d70>] __list_add+0x3d/0xad
[ 48.272840] PGD 0
[ 48.272840] Oops: 0000 [#1] SMP DEBUG_PAGEALLOC
[ 48.272840] CPU 0
[ 48.272840] Modules linked in:
[ 48.272840]
[ 48.272840] Pid: 1, comm: swapper/0 Tainted: G W 3.5.0-rc1+ #1 Bochs Bochs
[ 48.272840] RIP: 0010:[<ffffffff816c0d70>] [<ffffffff816c0d70>] __list_add+0x3d/0xad
[ 48.272840] RSP: 0018:ffff880017365db0 EFLAGS: 00010046
[ 48.272840] RAX: ffffffff853e7100 RBX: 0000000000000000 RCX: 0000000000000000
[ 48.272840] RDX: ffffffff853e7100 RSI: 0000000000000000 RDI: ffff880017365e10
[ 48.272840] RBP: ffff880017365dd0 R08: 0000000000000000 R09: ffffffff85139e70
[ 48.272840] R10: 00000000ffffffff R11: 00000000ffffffff R12: ffffffff853e7100
[ 48.272840] R13: ffff880017365e10 R14: ffff880017360040 R15: ffffffff820b2afb
[ 48.272840] FS: 0000000000000000(0000) GS:ffff880017400000(0000) knlGS:0000000000000000
[ 48.272840] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 48.272840] CR2: 0000000000000000 CR3: 0000000004014000 CR4: 00000000000006f0
[ 48.272840] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 48.272840] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 48.272840] Process swapper/0 (pid: 1, threadinfo ffff880017364000, task ffff880017360040)
[ 48.272840] Stack:
[ 48.272840] 00000000ffffffff ffffffff853e70b0 0000000000000246 ffffffff853e70b8
[ 48.272840] ffff880017365e60 ffffffff82e93045 ffffffff820b2afb ffff880017360040
[ 48.272840] ffffffff82e93615 ffffffff853e7100 0000000000000002 ffffffff853e7128
[ 48.272840] Call Trace:
[ 48.272840] [<ffffffff82e93045>] __mutex_lock_common+0x12a/0x387
[ 48.272840] [<ffffffff820b2afb>] ? iwl_opmode_register+0x23/0xbb
[ 48.272840] [<ffffffff82e93615>] ? __mutex_unlock_slowpath+0x116/0x126
[ 48.272840] [<ffffffff82e933b1>] mutex_lock_nested+0x40/0x45
[ 48.272840] [<ffffffff820b2afb>] iwl_opmode_register+0x23/0xbb
[ 48.272840] [<ffffffff84660e4f>] ? mwl8k_driver_init+0x1b/0x1b
[ 48.272840] [<ffffffff84660ea1>] iwl_init+0x52/0x73
[ 48.272840] [<ffffffff81002099>] do_one_initcall+0x7f/0x13a
[ 48.272840] [<ffffffff84603d39>] kernel_init+0x170/0x1f8
[ 48.272840] [<ffffffff84603590>] ? do_early_param+0x8c/0x8c
[ 48.272840] [<ffffffff82e9db74>] kernel_thread_helper+0x4/0x10
[ 48.272840] [<ffffffff82e95db0>] ? retint_restore_args+0x13/0x13
[ 48.272840] [<ffffffff84603bc9>] ? start_kernel+0x3e7/0x3e7
[ 48.272840] [<ffffffff82e9db70>] ? gs_change+0x13/0x13
[ 48.272840] Code: 41 53 4c 8b 42 08 49 39 f0 74 20 49 89 d1 48 89 f1 48 c7 c2 88 d8 a9 83 be 1d 00 00 00 48 c7 c7 36 d7 a9 83 31 c0 e8 77 f5 9c ff <4c> 8b 03 4d 39 e0 74 20 49 89 d9 4c 89 e1 48 c7 c2 d5 d8 a9 83
[ 48.272840] RIP [<ffffffff816c0d70>] __list_add+0x3d/0xad
[ 48.272840] RSP <ffff880017365db0>
[ 48.272840] CR2: 0000000000000000
[ 48.272840] ---[ end trace 695977a38adc57f5 ]---
[ 48.272840] note: swapper/0[1] exited with preempt_count 1
[ 53.626234] swapper/0 (1) used greatest stack depth: 3736 bytes left
[ 53.691089] BUG: scheduling while atomic: swapper/0/1/0x10000002
[ 53.757370] INFO: lockdep is turned off.
[ 53.822948] Modules linked in:
[ 53.884699] Pid: 1, comm: swapper/0 Tainted: G D W 3.5.0-rc1+ #1
[ 53.947786] Call Trace:
[ 54.009694] [<ffffffff82e45fc1>] __schedule_bug+0x66/0x75
[ 54.074043] [<ffffffff82e93ca9>] __schedule+0x95/0x5ff
[ 54.138611] [<ffffffff810bcc33>] __cond_resched+0x27/0x32
[ 54.201513] [<ffffffff82e9426f>] _cond_resched+0x19/0x22
[ 54.263749] [<ffffffff82e9339b>] mutex_lock_nested+0x2a/0x45
[ 54.328471] [<ffffffff81134392>] perf_event_exit_task+0x2d/0x1cc
[ 54.390278] [<ffffffff81094c39>] do_exit+0x321/0x81f
[ 54.454589] [<ffffffff810929ca>] ? kmsg_dump+0x87/0x145
[ 54.520481] [<ffffffff82e96b15>] oops_end+0xb0/0xb8
[ 54.587708] [<ffffffff82e4522e>] no_context+0x250/0x27b
[ 54.655396] [<ffffffff82e45421>] __bad_area_nosemaphore+0x1c8/0x1e8
[ 54.723800] [<ffffffff8111e7c8>] ? irq_trace+0x14/0x21
[ 54.793704] [<ffffffff82e45454>] bad_area_nosemaphore+0x13/0x15
[ 54.863119] [<ffffffff82e98fba>] do_page_fault+0x1b3/0x3d6
[ 54.932158] [<ffffffff810d9e8c>] ? trace_hardirqs_off+0xd/0xf
[ 55.003047] [<ffffffff810d9e8c>] ? trace_hardirqs_off+0xd/0xf
[ 55.067450] [<ffffffff82e95997>] ? _raw_spin_unlock_irqrestore+0x3e/0x61
[ 55.131685] [<ffffffff8111e7c8>] ? irq_trace+0x14/0x21
[ 55.193687] [<ffffffff8111eee0>] ? time_hardirqs_off+0x26/0x2a
[ 55.256207] [<ffffffff82e962a6>] ? error_sti+0x5/0x6
[ 55.318594] [<ffffffff816aff3d>] ? trace_hardirqs_off_thunk+0x3a/0x3c
[ 55.382552] [<ffffffff810d9e00>] ? trace_hardirqs_off_caller+0x1f/0x9e
[ 55.446638] [<ffffffff816aff3d>] ? trace_hardirqs_off_thunk+0x3a/0x3c
[ 55.509327] [<ffffffff820b2afb>] ? iwl_opmode_register+0x23/0xbb
[ 55.570097] [<ffffffff82e96055>] page_fault+0x25/0x30
[ 55.630741] [<ffffffff820b2afb>] ? iwl_opmode_register+0x23/0xbb
[ 55.690780] [<ffffffff816c0d70>] ? __list_add+0x3d/0xad
[ 55.750381] [<ffffffff82e93045>] __mutex_lock_common+0x12a/0x387
[ 55.808248] [<ffffffff820b2afb>] ? iwl_opmode_register+0x23/0xbb
[ 55.865275] [<ffffffff82e93615>] ? __mutex_unlock_slowpath+0x116/0x126
[ 55.922696] [<ffffffff82e933b1>] mutex_lock_nested+0x40/0x45
[ 55.981706] [<ffffffff820b2afb>] iwl_opmode_register+0x23/0xbb
[ 56.040514] [<ffffffff84660e4f>] ? mwl8k_driver_init+0x1b/0x1b
[ 56.098181] [<ffffffff84660ea1>] iwl_init+0x52/0x73
[ 56.155184] [<ffffffff81002099>] do_one_initcall+0x7f/0x13a
[ 56.216123] [<ffffffff84603d39>] kernel_init+0x170/0x1f8
[ 56.274993] [<ffffffff84603590>] ? do_early_param+0x8c/0x8c
[ 56.335556] [<ffffffff82e9db74>] kernel_thread_helper+0x4/0x10
[ 56.394430] [<ffffffff82e95db0>] ? retint_restore_args+0x13/0x13
[ 56.454955] [<ffffffff84603bc9>] ? start_kernel+0x3e7/0x3e7
[ 56.514499] [<ffffffff82e9db70>] ? gs_change+0x13/0x13
[ 56.574506] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009
[ 56.574506]
[ 56.578138] [sched_delayed] sched: RT throttling activated
Thanks,
Fengguang
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