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Date: Thu, 12 Mar 2009 17:53:11 -0700
From: Kaleb Pederson <kaleb.pederson@...il.com>
To: linux-kernel@...r.kernel.org
Subject: kernel lockup - copy_user_generic_string+45 -> oops?
I'm experiencing random but frequent lockups on a newly built system.
I installed a crashkernel and was able to produce a crash dump which
follows:
crash> bt -a
PID: 11672 TASK: ffff88012960d260 CPU: 0 COMMAND: "strings"
#0 [ffffffff807e8cd0] machine_kexec at ffffffff8021ef5b
#1 [ffffffff807e8db0] crash_kexec at ffffffff8026326e
#2 [ffffffff807e8e80] oops_end at ffffffff80554115
#3 [ffffffff807e8eb0] die_nmi at ffffffff805542ba
#4 [ffffffff807e8ee0] nmi_watchdog_tick at ffffffff8055461a
#5 [ffffffff807e8f20] do_nmi at ffffffff80553bc7
#6 [ffffffff807e8f50] nmi at ffffffff8055398a
[exception RIP: copy_user_generic_string+45]
RIP: ffffffff803ca68d RSP: ffff88012dcb5c60 RFLAGS: 00000246
RAX: ffff880000000000 RBX: ffff88012dcb5d08 RCX: 00000000000000af
RDX: 0000000000000000 RSI: ffff8801190d1a88 RDI: 00007f5e594f6a98
RBP: ffff88012dcb5c98 R8: 0000000000010287 R9: ffffe20003d7adc0
R10: 0000000000000002 R11: 0000000000000001 R12: 0000000000001000
R13: 0000000000096000 R14: ffffe20003d7adb8 R15: 0000000000000000
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
--- <exception stack> ---
#7 [ffff88012dcb5c60] copy_user_generic_string at ffffffff803ca68d
#8 [ffff88012dcb5c60] file_read_actor at ffffffff802851f1
#9 [ffff88012dcb5ca0] generic_file_aio_read at ffffffff80284ee5
#10 [ffff88012dcb5d70] xfs_read at ffffffff803926d4
#11 [ffff88012dcb5dd0] xfs_file_aio_read at ffffffff8038f11b
#12 [ffff88012dcb5de0] do_sync_read at ffffffff802ab19d
#13 [ffff88012dcb5f10] vfs_read at ffffffff802ab960
#14 [ffff88012dcb5f40] sys_read at ffffffff802abd1c
#15 [ffff88012dcb5f80] system_call_fastpath at ffffffff8020bf5b
RIP: 00007f5e59647860 RSP: 00007fff61ffcd80 RFLAGS: 00010202
RAX: 0000000000000000 RBX: ffffffff8020bf5b RCX: 00007f5e596507da
RDX: 0000000000359000 RSI: 00007f5e59233010 RDI: 000000000000000a
RBP: 0000000000609200 R8: 00007f5e59fd46f0 R9: 00007f5e59233010
R10: 0000000000200000 R11: 0000000000000246 R12: 00000000003599af
R13: 00007f5e59233010 R14: 00000000003599af R15: 0000000000000000
ORIG_RAX: 0000000000000000 CS: 0033 SS: 002b
PID: 0 TASK: ffff88012f26b410 CPU: 1 COMMAND: "swapper"
#0 [ffff88012f274e80] crash_nmi_callback at ffffffff8021b588
#1 [ffff88012f274e90] notifier_call_chain at ffffffff80555ac6
#2 [ffff88012f274ed0] __atomic_notifier_call_chain at ffffffff80555b05
#3 [ffff88012f274ee0] atomic_notifier_call_chain at ffffffff80555b16
#4 [ffff88012f274ef0] notify_die at ffffffff8024f776
#5 [ffff88012f274f20] do_nmi at ffffffff80553bb1
#6 [ffff88012f274f50] nmi at ffffffff8055398a
[exception RIP: default_idle+43]
RIP: ffffffff80211d9d RSP: ffff88012f26ded8 RFLAGS: 00000246
RAX: ffff88012f26dfd8 RBX: ffffffff8076bbb8 RCX: 00000000c0010055
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff806b4d90
RBP: ffff88012f26ded8 R8: 0000000000000000 R9: 0000000000000001
R10: 0000000000000022 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
--- <exception stack> ---
#7 [ffff88012f26ded8] default_idle at ffffffff80211d9d
#8 [ffff88012f26dee0] c1e_idle at ffffffff80211fc5
#9 [ffff88012f26df10] cpu_idle at ffffffff8020aca0
PID: 0 TASK: ffff88012f2a1450 CPU: 2 COMMAND: "swapper"
#0 [ffff88012f2a9e80] crash_nmi_callback at ffffffff8021b588
#1 [ffff88012f2a9e90] notifier_call_chain at ffffffff80555ac6
#2 [ffff88012f2a9ed0] __atomic_notifier_call_chain at ffffffff80555b05
#3 [ffff88012f2a9ee0] atomic_notifier_call_chain at ffffffff80555b16
#4 [ffff88012f2a9ef0] notify_die at ffffffff8024f776
#5 [ffff88012f2a9f20] do_nmi at ffffffff80553bb1
#6 [ffff88012f2a9f50] nmi at ffffffff8055398a
[exception RIP: default_idle+43]
RIP: ffffffff80211d9d RSP: ffff88012f2a3ed8 RFLAGS: 00000246
RAX: ffff88012f2a3fd8 RBX: ffffffff8076bbb8 RCX: 00000000c0010055
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff806b4d90
RBP: ffff88012f2a3ed8 R8: 0000000000000000 R9: 0000000000000002
R10: 0000000000000003 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
--- <exception stack> ---
#7 [ffff88012f2a3ed8] default_idle at ffffffff80211d9d
#8 [ffff88012f2a3ee0] c1e_idle at ffffffff80211fc5
#9 [ffff88012f2a3f10] cpu_idle at ffffffff8020aca0
PID: 0 TASK: ffff88012f2d5490 CPU: 3 COMMAND: "swapper"
#0 [ffff88012f2e0e80] crash_nmi_callback at ffffffff8021b588
#1 [ffff88012f2e0e90] notifier_call_chain at ffffffff80555ac6
#2 [ffff88012f2e0ed0] __atomic_notifier_call_chain at ffffffff80555b05
#3 [ffff88012f2e0ee0] atomic_notifier_call_chain at ffffffff80555b16
#4 [ffff88012f2e0ef0] notify_die at ffffffff8024f776
#5 [ffff88012f2e0f20] do_nmi at ffffffff80553bb1
#6 [ffff88012f2e0f50] nmi at ffffffff8055398a
[exception RIP: default_idle+43]
RIP: ffffffff80211d9d RSP: ffff88012f2d7ed8 RFLAGS: 00000246
RAX: ffff88012f2d7fd8 RBX: ffffffff8076bbb8 RCX: 00000000c0010055
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff806b4d90
RBP: ffff88012f2d7ed8 R8: 0000000000000000 R9: 0000000000000003
R10: 0000000000000003 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
--- <exception stack> ---
#7 [ffff88012f2d7ed8] default_idle at ffffffff80211d9d
#8 [ffff88012f2d7ee0] c1e_idle at ffffffff80211fc5
#9 [ffff88012f2d7f10] cpu_idle at ffffffff8020aca0
I'm interested in helping arrive at a solution and any workarounds.
Please let me know if there's anything else useful that I can provide.
Thanks.
--Kaleb
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