INFO: rcu detected stall in do_signal
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syzbot
Oct 11, 2018, 8:55:03 PM10/11/18
to syzkaller-upst...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: ef4ab8447aa2 selftests: bpf: install script with_addr.sh
git tree: bpf-next
console output: https://syzkaller.appspot.com/x/log.txt?x=14ad477e400000
kernel config: https://syzkaller.appspot.com/x/.config?x=7e7e2279c0020d5f
dashboard link: https://syzkaller.appspot.com/bug?extid=0848473981aa3d07d97f
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
CC: [ac...@kernel.org alexander...@linux.intel.com
jo...@redhat.com linux-...@vger.kernel.org mi...@redhat.com
namh...@kernel.org pet...@infradead.org]
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+084847...@syzkaller.appspotmail.com
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (1 GPs behind) idle=892/1/0x4000000000000002
softirq=14707/14708 fqs=5250
rcu: (t=10502 jiffies g=19149 q=1225)
NMI backtrace for cpu 0
CPU: 0 PID: 10982 Comm: syz-executor2 Not tainted 4.19.0-rc6+ #118
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113
nmi_cpu_backtrace.cold.3+0x63/0xa2 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1b3/0x1ed lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_single_cpu_backtrace include/linux/nmi.h:162 [inline]
rcu_dump_cpu_stacks+0x175/0x1c2 kernel/rcu/tree.c:1340
print_cpu_stall.cold.78+0x2d3/0x524 kernel/rcu/tree.c:1478
check_cpu_stall kernel/rcu/tree.c:1550 [inline]
__rcu_pending kernel/rcu/tree.c:3276 [inline]
rcu_pending kernel/rcu/tree.c:3319 [inline]
rcu_check_callbacks+0xfd9/0x1990 kernel/rcu/tree.c:2665
update_process_times+0x2d/0x70 kernel/time/timer.c:1636
tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:164
tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1274
__run_hrtimer kernel/time/hrtimer.c:1398 [inline]
__hrtimer_run_queues+0x41c/0x10d0 kernel/time/hrtimer.c:1460
hrtimer_interrupt+0x313/0x780 kernel/time/hrtimer.c:1518
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1029 [inline]
smp_apic_timer_interrupt+0x1a1/0x760 arch/x86/kernel/apic/apic.c:1054
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:864
</IRQ>
RIP: 0010:__pmu_filter_match kernel/events/core.c:1953 [inline]
RIP: 0010:pmu_filter_match kernel/events/core.c:1971 [inline]
RIP: 0010:event_filter_match kernel/events/core.c:1982 [inline]
RIP: 0010:perf_iterate_sb_cpu kernel/events/core.c:6620 [inline]
RIP: 0010:perf_iterate_sb+0x979/0xc60 kernel/events/core.c:6652
Code: 00 49 8b 44 24 10 4c 8d 68 f0 4d 39 e5 0f 84 58 fe ff ff e8 59 82 e7
ff 49 8d bd 98 00 00 00 48 89 f8 48 c1 e8 03 80 3c 18 00 <0f> 85 db 01 00
00 4d 8b b5 98 00 00 00 49 8d be f8 00 00 00 48 89
RSP: 0018:ffff88019a136d18 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 1ffff100397dfee3 RBX: dffffc0000000000 RCX: ffffffff838d79fa
RDX: 0000000000000000 RSI: ffffffff81975337 RDI: ffff8801cbeff718
RBP: ffff88019a136ea8 R08: ffff88019c44e5c0 R09: 0000000000000000
R10: fffffbfff13e851f R11: 0000000000000000 R12: ffff8801b9921600
R13: ffff8801cbeff680 R14: 0000000000000000 R15: ffffed0033426dc0
perf_event_task+0x29b/0x440 kernel/events/core.c:6890
perf_event_exit_task+0xc28/0x1070 kernel/events/core.c:11136
do_exit+0xf91/0x2610 kernel/exit.c:876
do_group_exit+0x177/0x440 kernel/exit.c:970
get_signal+0x8b0/0x1980 kernel/signal.c:2513
do_signal+0x9c/0x21e0 arch/x86/kernel/signal.c:816
exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162
prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457519
Code: Bad RIP value.
RSP: 002b:00007f4523c8fcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000072c0e8 RCX: 0000000000457519
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000072c0e8
RBP: 000000000072c0e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000072c0ec
R13: 00007ffcdf0fbb3f R14: 00007f4523c909c0 R15: 0000000000000003
rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
rcu: 0-....: (1 GPs behind) idle=892/1/0x4000000000000000
softirq=14707/14708 fqs=5243
rcu: (detected by 1, t=10582 jiffies, g=2257, q=2)
Sending NMI from CPU 1 to CPUs 0:
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.349
msecs
NMI backtrace for cpu 0
CPU: 0 PID: 10982 Comm: syz-executor2 Not tainted 4.19.0-rc6+ #118
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:__read_once_size include/linux/compiler.h:188 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:69 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x26/0x50 kernel/kcov.c:101
Code: 5d c3 66 90 55 48 89 e5 65 48 8b 04 25 40 ee 01 00 65 8b 15 2c 18 83
7e 81 e2 00 01 1f 00 48 8b 75 08 75 2b 8b 90 d0 12 00 00 <83> fa 02 75 20
48 8b 88 d8 12 00 00 8b 80 d4 12 00 00 48 8b 11 48
RSP: 0018:ffff88019a136d08 EFLAGS: 00000246
RAX: ffff88019c44e5c0 RBX: dffffc0000000000 RCX: ffffffff838d79fa
RDX: 0000000000000000 RSI: ffffffff81975337 RDI: ffff8801cbeff690
RBP: ffff88019a136d08 R08: ffff88019c44e5c0 R09: 0000000000000000
R10: fffffbfff13e851f R11: 0000000000000000 R12: ffff8801b9921600
R13: ffff8801cbeff680 R14: 0000000000000000 R15: ffffed0033426dc0
FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004574ef CR3: 000000000926a000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
__pmu_filter_match kernel/events/core.c:1953 [inline]
pmu_filter_match kernel/events/core.c:1971 [inline]
event_filter_match kernel/events/core.c:1982 [inline]
perf_iterate_sb_cpu kernel/events/core.c:6620 [inline]
perf_iterate_sb+0x967/0xc60 kernel/events/core.c:6652
perf_event_task+0x29b/0x440 kernel/events/core.c:6890
perf_event_exit_task+0xc28/0x1070 kernel/events/core.c:11136
do_exit+0xf91/0x2610 kernel/exit.c:876
do_group_exit+0x177/0x440 kernel/exit.c:970
get_signal+0x8b0/0x1980 kernel/signal.c:2513
do_signal+0x9c/0x21e0 arch/x86/kernel/signal.c:816
exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162
prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457519
Code: Bad RIP value.
RSP: 002b:00007f4523c8fcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000072c0e8 RCX: 0000000000457519
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000072c0e8
RBP: 000000000072c0e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000072c0ec
R13: 00007ffcdf0fbb3f R14: 00007f4523c909c0 R15: 0000000000000003
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with
syzbot.
syzbot found the following crash on:
HEAD commit: ef4ab8447aa2 selftests: bpf: install script with_addr.sh
git tree: bpf-next
console output: https://syzkaller.appspot.com/x/log.txt?x=14ad477e400000
kernel config: https://syzkaller.appspot.com/x/.config?x=7e7e2279c0020d5f
dashboard link: https://syzkaller.appspot.com/bug?extid=0848473981aa3d07d97f
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
CC: [ac...@kernel.org alexander...@linux.intel.com
jo...@redhat.com linux-...@vger.kernel.org mi...@redhat.com
namh...@kernel.org pet...@infradead.org]
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+084847...@syzkaller.appspotmail.com
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (1 GPs behind) idle=892/1/0x4000000000000002
softirq=14707/14708 fqs=5250
rcu: (t=10502 jiffies g=19149 q=1225)
NMI backtrace for cpu 0
CPU: 0 PID: 10982 Comm: syz-executor2 Not tainted 4.19.0-rc6+ #118
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113
nmi_cpu_backtrace.cold.3+0x63/0xa2 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1b3/0x1ed lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_single_cpu_backtrace include/linux/nmi.h:162 [inline]
rcu_dump_cpu_stacks+0x175/0x1c2 kernel/rcu/tree.c:1340
print_cpu_stall.cold.78+0x2d3/0x524 kernel/rcu/tree.c:1478
check_cpu_stall kernel/rcu/tree.c:1550 [inline]
__rcu_pending kernel/rcu/tree.c:3276 [inline]
rcu_pending kernel/rcu/tree.c:3319 [inline]
rcu_check_callbacks+0xfd9/0x1990 kernel/rcu/tree.c:2665
update_process_times+0x2d/0x70 kernel/time/timer.c:1636
tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:164
tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1274
__run_hrtimer kernel/time/hrtimer.c:1398 [inline]
__hrtimer_run_queues+0x41c/0x10d0 kernel/time/hrtimer.c:1460
hrtimer_interrupt+0x313/0x780 kernel/time/hrtimer.c:1518
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1029 [inline]
smp_apic_timer_interrupt+0x1a1/0x760 arch/x86/kernel/apic/apic.c:1054
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:864
</IRQ>
RIP: 0010:__pmu_filter_match kernel/events/core.c:1953 [inline]
RIP: 0010:pmu_filter_match kernel/events/core.c:1971 [inline]
RIP: 0010:event_filter_match kernel/events/core.c:1982 [inline]
RIP: 0010:perf_iterate_sb_cpu kernel/events/core.c:6620 [inline]
RIP: 0010:perf_iterate_sb+0x979/0xc60 kernel/events/core.c:6652
Code: 00 49 8b 44 24 10 4c 8d 68 f0 4d 39 e5 0f 84 58 fe ff ff e8 59 82 e7
ff 49 8d bd 98 00 00 00 48 89 f8 48 c1 e8 03 80 3c 18 00 <0f> 85 db 01 00
00 4d 8b b5 98 00 00 00 49 8d be f8 00 00 00 48 89
RSP: 0018:ffff88019a136d18 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 1ffff100397dfee3 RBX: dffffc0000000000 RCX: ffffffff838d79fa
RDX: 0000000000000000 RSI: ffffffff81975337 RDI: ffff8801cbeff718
RBP: ffff88019a136ea8 R08: ffff88019c44e5c0 R09: 0000000000000000
R10: fffffbfff13e851f R11: 0000000000000000 R12: ffff8801b9921600
R13: ffff8801cbeff680 R14: 0000000000000000 R15: ffffed0033426dc0
perf_event_task+0x29b/0x440 kernel/events/core.c:6890
perf_event_exit_task+0xc28/0x1070 kernel/events/core.c:11136
do_exit+0xf91/0x2610 kernel/exit.c:876
do_group_exit+0x177/0x440 kernel/exit.c:970
get_signal+0x8b0/0x1980 kernel/signal.c:2513
do_signal+0x9c/0x21e0 arch/x86/kernel/signal.c:816
exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162
prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457519
Code: Bad RIP value.
RSP: 002b:00007f4523c8fcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000072c0e8 RCX: 0000000000457519
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000072c0e8
RBP: 000000000072c0e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000072c0ec
R13: 00007ffcdf0fbb3f R14: 00007f4523c909c0 R15: 0000000000000003
rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
rcu: 0-....: (1 GPs behind) idle=892/1/0x4000000000000000
softirq=14707/14708 fqs=5243
rcu: (detected by 1, t=10582 jiffies, g=2257, q=2)
Sending NMI from CPU 1 to CPUs 0:
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.349
msecs
NMI backtrace for cpu 0
CPU: 0 PID: 10982 Comm: syz-executor2 Not tainted 4.19.0-rc6+ #118
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:__read_once_size include/linux/compiler.h:188 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:69 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x26/0x50 kernel/kcov.c:101
Code: 5d c3 66 90 55 48 89 e5 65 48 8b 04 25 40 ee 01 00 65 8b 15 2c 18 83
7e 81 e2 00 01 1f 00 48 8b 75 08 75 2b 8b 90 d0 12 00 00 <83> fa 02 75 20
48 8b 88 d8 12 00 00 8b 80 d4 12 00 00 48 8b 11 48
RSP: 0018:ffff88019a136d08 EFLAGS: 00000246
RAX: ffff88019c44e5c0 RBX: dffffc0000000000 RCX: ffffffff838d79fa
RDX: 0000000000000000 RSI: ffffffff81975337 RDI: ffff8801cbeff690
RBP: ffff88019a136d08 R08: ffff88019c44e5c0 R09: 0000000000000000
R10: fffffbfff13e851f R11: 0000000000000000 R12: ffff8801b9921600
R13: ffff8801cbeff680 R14: 0000000000000000 R15: ffffed0033426dc0
FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004574ef CR3: 000000000926a000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
__pmu_filter_match kernel/events/core.c:1953 [inline]
pmu_filter_match kernel/events/core.c:1971 [inline]
event_filter_match kernel/events/core.c:1982 [inline]
perf_iterate_sb_cpu kernel/events/core.c:6620 [inline]
perf_iterate_sb+0x967/0xc60 kernel/events/core.c:6652
perf_event_task+0x29b/0x440 kernel/events/core.c:6890
perf_event_exit_task+0xc28/0x1070 kernel/events/core.c:11136
do_exit+0xf91/0x2610 kernel/exit.c:876
do_group_exit+0x177/0x440 kernel/exit.c:970
get_signal+0x8b0/0x1980 kernel/signal.c:2513
do_signal+0x9c/0x21e0 arch/x86/kernel/signal.c:816
exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162
prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457519
Code: Bad RIP value.
RSP: 002b:00007f4523c8fcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000072c0e8 RCX: 0000000000457519
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000072c0e8
RBP: 000000000072c0e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000072c0ec
R13: 00007ffcdf0fbb3f R14: 00007f4523c909c0 R15: 0000000000000003
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with
syzbot.
syzbot
Apr 28, 2019, 11:41:04 AM4/28/19
to syzkaller-upst...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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