[v6.1] INFO: rcu detected stall in sys_clock_nanosleep (2)
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syzbot
Jan 10, 2024, 5:07:35 PMJan 10
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 7c58bfa711cb Linux 6.1.72
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=12d312b9e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=36d06871d6eebdd3
dashboard link: https://syzkaller.appspot.com/bug?extid=d81dae19476f63cd6030
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/b20a634d81c4/disk-7c58bfa7.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d6a58728d5fa/vmlinux-7c58bfa7.xz
kernel image: https://storage.googleapis.com/syzbot-assets/c418bf23bed2/bzImage-7c58bfa7.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d81dae...@syzkaller.appspotmail.com
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (0 ticks this GP) idle=56dc/1/0x4000000000000000 softirq=88598/88598 fqs=6
(detected by 1, t=10502 jiffies, g=125257, q=131 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 25446 Comm: syz-executor.5 Not tainted 6.1.72-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:cpumask_check include/linux/cpumask.h:117 [inline]
RIP: 0010:cpumask_test_cpu include/linux/cpumask.h:444 [inline]
RIP: 0010:cpu_online include/linux/cpumask.h:1030 [inline]
RIP: 0010:trace_hrtimer_start include/trace/events/timer.h:202 [inline]
RIP: 0010:debug_activate kernel/time/hrtimer.c:476 [inline]
RIP: 0010:enqueue_hrtimer+0x41/0x390 kernel/time/hrtimer.c:1084
Code: 00 00 fc ff df e8 3f a3 10 00 4c 89 f7 48 c7 c6 00 d0 ed 8a e8 00 6c c2 02 0f 1f 44 00 00 e8 26 a3 10 00 65 8b 2d ff 49 88 7e <48> c7 c0 f8 4f 73 8e 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 7f 01
RSP: 0018:ffffc90000007d28 EFLAGS: 00000046
RAX: ffffffff8179cf9a RBX: 0000000000000000 RCX: ffff88805cc98000
RDX: 0000000080010002 RSI: 0000000000000004 RDI: 0000000000000001
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff23f5691
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8880b982a5c0 R14: ffff88803c224340 R15: dffffc0000000000
FS: 0000555556838480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc5d813fb8 CR3: 000000003bae2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<IRQ>
__run_hrtimer kernel/time/hrtimer.c:1702 [inline]
__hrtimer_run_queues+0x728/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
__sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:finish_task_switch+0x1d3/0x810 kernel/sched/core.c:5124
Code: 37 0b 00 48 83 c4 08 4c 89 f7 e8 98 30 00 00 0f 1f 44 00 00 4c 89 f7 e8 eb b2 35 09 e8 a6 23 32 00 fb 49 8d bc 24 f8 15 00 00 <48> 89 f8 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df 42 0f b6 04 28
RSP: 0018:ffffc9000e557a08 EFLAGS: 00000286
RAX: daf5dc7ae8898600 RBX: ffff8880580c3bb4 RCX: ffffffff91c89103
RDX: dffffc0000000000 RSI: ffffffff8aebe640 RDI: ffff88805cc995f8
RBP: ffffc9000e557a50 R08: dffffc0000000000 R09: ffffed10173073c1
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88805cc98000
R13: 1ffff1101730756b R14: ffff8880b9839e00 R15: ffff8880b983ab58
context_switch kernel/sched/core.c:5248 [inline]
__schedule+0x1435/0x4550 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
do_nanosleep+0x192/0x5f0 kernel/time/hrtimer.c:2044
hrtimer_nanosleep+0x24d/0x490 kernel/time/hrtimer.c:2097
__do_sys_clock_nanosleep kernel/time/posix-timers.c:1308 [inline]
__se_sys_clock_nanosleep+0x323/0x3b0 kernel/time/posix-timers.c:1285
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f1ad26a8135
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 b9 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f ba ff ff 48 8b 04 24 48 83 c4 28 f7 d8
RSP: 002b:00007ffe4b0485f0 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 00007f1ad27abf80 RCX: 00007f1ad26a8135
RDX: 00007ffe4b048630 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f1ad27ad980 R08: 0000000000000000 R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000293 R12: 00000000001b0cf2
R13: ffffffffffffffff R14: 00007f1ad2200000 R15: 00000000001b09b1
</TASK>
rcu: rcu_preempt kthread starved for 10488 jiffies! g125257 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:25920 pid:16 ppid:2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x142d/0x4550 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1935
rcu_gp_fqs_loop+0x2d2/0x1120 kernel/rcu/tree.c:1674
rcu_gp_kthread+0xa3/0x3a0 kernel/rcu/tree.c:1873
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 25474 Comm: syz-executor.4 Not tainted 6.1.72-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:csd_lock_wait kernel/smp.c:424 [inline]
RIP: 0010:smp_call_function_many_cond+0x1fb0/0x3460 kernel/smp.c:998
Code: 2f 44 89 ee 83 e6 01 31 ff e8 0c 43 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 0a e8 97 3f 0b 00 e9 1b ff ff ff f3 90 <42> 0f b6 04 2b 84 c0 75 14 41 f7 07 01 00 00 00 0f 84 fe fe ff ff
RSP: 0018:ffffc9000e28f500 EFLAGS: 00000246
RAX: ffffffff817f334b RBX: 1ffff1101730841d RCX: 0000000000040000
RDX: ffffc90012387000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc9000e28f8c8 R08: ffffffff817f3314 R09: fffffbfff209226b
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000800000000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b98420e8
FS: 00007f2a0244a6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020082000 CR3: 000000003bbf1000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
</IRQ>
<TASK>
on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1166
kill_bdev block/bdev.c:75 [inline]
set_blocksize+0x2cd/0x350 block/bdev.c:152
sb_set_blocksize+0x45/0xe0 block/bdev.c:161
init_nilfs+0x625/0x790 fs/nilfs2/the_nilfs.c:719
nilfs_fill_super+0xe9/0x660 fs/nilfs2/super.c:1078
nilfs_mount+0x679/0x9a0 fs/nilfs2/super.c:1347
legacy_get_tree+0xeb/0x180 fs/fs_context.c:632
vfs_get_tree+0x88/0x270 fs/super.c:1562
do_new_mount+0x28b/0xae0 fs/namespace.c:3040
do_mount fs/namespace.c:3383 [inline]
__do_sys_mount fs/namespace.c:3591 [inline]
__se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3568
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f2a0167e42a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2a02449ee8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f2a02449f80 RCX: 00007f2a0167e42a
RDX: 0000000020000a00 RSI: 0000000020000a40 RDI: 00007f2a02449f40
RBP: 0000000020000a00 R08: 00007f2a02449f80 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000a40
R13: 00007f2a02449f40 R14: 00000000000009f4 R15: 0000000020000a80
</TASK>
---
This report 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 issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: 7c58bfa711cb Linux 6.1.72
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=12d312b9e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=36d06871d6eebdd3
dashboard link: https://syzkaller.appspot.com/bug?extid=d81dae19476f63cd6030
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/b20a634d81c4/disk-7c58bfa7.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d6a58728d5fa/vmlinux-7c58bfa7.xz
kernel image: https://storage.googleapis.com/syzbot-assets/c418bf23bed2/bzImage-7c58bfa7.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d81dae...@syzkaller.appspotmail.com
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (0 ticks this GP) idle=56dc/1/0x4000000000000000 softirq=88598/88598 fqs=6
(detected by 1, t=10502 jiffies, g=125257, q=131 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 25446 Comm: syz-executor.5 Not tainted 6.1.72-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:cpumask_check include/linux/cpumask.h:117 [inline]
RIP: 0010:cpumask_test_cpu include/linux/cpumask.h:444 [inline]
RIP: 0010:cpu_online include/linux/cpumask.h:1030 [inline]
RIP: 0010:trace_hrtimer_start include/trace/events/timer.h:202 [inline]
RIP: 0010:debug_activate kernel/time/hrtimer.c:476 [inline]
RIP: 0010:enqueue_hrtimer+0x41/0x390 kernel/time/hrtimer.c:1084
Code: 00 00 fc ff df e8 3f a3 10 00 4c 89 f7 48 c7 c6 00 d0 ed 8a e8 00 6c c2 02 0f 1f 44 00 00 e8 26 a3 10 00 65 8b 2d ff 49 88 7e <48> c7 c0 f8 4f 73 8e 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 7f 01
RSP: 0018:ffffc90000007d28 EFLAGS: 00000046
RAX: ffffffff8179cf9a RBX: 0000000000000000 RCX: ffff88805cc98000
RDX: 0000000080010002 RSI: 0000000000000004 RDI: 0000000000000001
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff23f5691
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8880b982a5c0 R14: ffff88803c224340 R15: dffffc0000000000
FS: 0000555556838480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc5d813fb8 CR3: 000000003bae2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<IRQ>
__run_hrtimer kernel/time/hrtimer.c:1702 [inline]
__hrtimer_run_queues+0x728/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
__sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:finish_task_switch+0x1d3/0x810 kernel/sched/core.c:5124
Code: 37 0b 00 48 83 c4 08 4c 89 f7 e8 98 30 00 00 0f 1f 44 00 00 4c 89 f7 e8 eb b2 35 09 e8 a6 23 32 00 fb 49 8d bc 24 f8 15 00 00 <48> 89 f8 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df 42 0f b6 04 28
RSP: 0018:ffffc9000e557a08 EFLAGS: 00000286
RAX: daf5dc7ae8898600 RBX: ffff8880580c3bb4 RCX: ffffffff91c89103
RDX: dffffc0000000000 RSI: ffffffff8aebe640 RDI: ffff88805cc995f8
RBP: ffffc9000e557a50 R08: dffffc0000000000 R09: ffffed10173073c1
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88805cc98000
R13: 1ffff1101730756b R14: ffff8880b9839e00 R15: ffff8880b983ab58
context_switch kernel/sched/core.c:5248 [inline]
__schedule+0x1435/0x4550 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
do_nanosleep+0x192/0x5f0 kernel/time/hrtimer.c:2044
hrtimer_nanosleep+0x24d/0x490 kernel/time/hrtimer.c:2097
__do_sys_clock_nanosleep kernel/time/posix-timers.c:1308 [inline]
__se_sys_clock_nanosleep+0x323/0x3b0 kernel/time/posix-timers.c:1285
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f1ad26a8135
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 b9 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f ba ff ff 48 8b 04 24 48 83 c4 28 f7 d8
RSP: 002b:00007ffe4b0485f0 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 00007f1ad27abf80 RCX: 00007f1ad26a8135
RDX: 00007ffe4b048630 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f1ad27ad980 R08: 0000000000000000 R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000293 R12: 00000000001b0cf2
R13: ffffffffffffffff R14: 00007f1ad2200000 R15: 00000000001b09b1
</TASK>
rcu: rcu_preempt kthread starved for 10488 jiffies! g125257 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:25920 pid:16 ppid:2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x142d/0x4550 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1935
rcu_gp_fqs_loop+0x2d2/0x1120 kernel/rcu/tree.c:1674
rcu_gp_kthread+0xa3/0x3a0 kernel/rcu/tree.c:1873
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 25474 Comm: syz-executor.4 Not tainted 6.1.72-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:csd_lock_wait kernel/smp.c:424 [inline]
RIP: 0010:smp_call_function_many_cond+0x1fb0/0x3460 kernel/smp.c:998
Code: 2f 44 89 ee 83 e6 01 31 ff e8 0c 43 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 0a e8 97 3f 0b 00 e9 1b ff ff ff f3 90 <42> 0f b6 04 2b 84 c0 75 14 41 f7 07 01 00 00 00 0f 84 fe fe ff ff
RSP: 0018:ffffc9000e28f500 EFLAGS: 00000246
RAX: ffffffff817f334b RBX: 1ffff1101730841d RCX: 0000000000040000
RDX: ffffc90012387000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc9000e28f8c8 R08: ffffffff817f3314 R09: fffffbfff209226b
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000800000000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b98420e8
FS: 00007f2a0244a6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020082000 CR3: 000000003bbf1000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
</IRQ>
<TASK>
on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1166
kill_bdev block/bdev.c:75 [inline]
set_blocksize+0x2cd/0x350 block/bdev.c:152
sb_set_blocksize+0x45/0xe0 block/bdev.c:161
init_nilfs+0x625/0x790 fs/nilfs2/the_nilfs.c:719
nilfs_fill_super+0xe9/0x660 fs/nilfs2/super.c:1078
nilfs_mount+0x679/0x9a0 fs/nilfs2/super.c:1347
legacy_get_tree+0xeb/0x180 fs/fs_context.c:632
vfs_get_tree+0x88/0x270 fs/super.c:1562
do_new_mount+0x28b/0xae0 fs/namespace.c:3040
do_mount fs/namespace.c:3383 [inline]
__do_sys_mount fs/namespace.c:3591 [inline]
__se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3568
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f2a0167e42a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2a02449ee8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f2a02449f80 RCX: 00007f2a0167e42a
RDX: 0000000020000a00 RSI: 0000000020000a40 RDI: 00007f2a02449f40
RBP: 0000000020000a00 R08: 00007f2a02449f80 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000a40
R13: 00007f2a02449f40 R14: 00000000000009f4 R15: 0000000020000a80
</TASK>
---
This report 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 issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot
Jan 13, 2024, 4:31:30 PMJan 13
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 26c690eff0a5 Linux 5.15.146
syzbot found the following issue on:
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=14068135e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=dc70d39e176dd118
dashboard link: https://syzkaller.appspot.com/bug?extid=0be56d4989ccfa20de51
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/e52ed2e53c97/disk-26c690ef.raw.xz
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
vmlinux: https://storage.googleapis.com/syzbot-assets/0baec14a2844/vmlinux-26c690ef.xz
kernel image: https://storage.googleapis.com/syzbot-assets/d33fddfbaf83/bzImage-26c690ef.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
(detected by 1, t=10506 jiffies, g=14529, q=1719)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3551 Comm: syz-executor.4 Not tainted 5.15.146-syzkaller #0
NMI backtrace for cpu 0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:196
Code: 00 00 00 0f 1f 00 53 48 89 fb e8 17 00 00 00 48 8b 3d 28 75 63 0c 48 89 de 5b e9 97 db 48 00 cc cc cc cc cc cc cc 48 8b 04 24 <65> 48 8b 0d 74 45 82 7e 65 8b 15 75 45 82 7e f7 c2 00 01 ff 00 74
RSP: 0000:ffffc90000007358 EFLAGS: 00000046
RAX: ffffffff81a1099d RBX: 0000000000000000 RCX: ffff88801e810000
RDX: 0000000000000102 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007450 R08: ffffffff81a1098d R09: fffffbfff1f79e19
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900000076c0
R13: ffffc90000007506 R14: ffffc90000007504 R15: dffffc0000000000
FS: 00005555570fc480(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c01cf28000 CR3: 000000004348d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<IRQ>
perf_prepare_sample+0xdfd/0x1ce0 kernel/events/core.c:7647
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<IRQ>
__perf_event_output kernel/events/core.c:7717 [inline]
perf_event_output_forward+0x199/0x310 kernel/events/core.c:7737
__perf_event_overflow+0x35d/0x530 kernel/events/core.c:9432
perf_swevent_overflow kernel/events/core.c:9508 [inline]
perf_swevent_event+0x4c5/0x550 kernel/events/core.c:9546
perf_tp_event+0x363/0xc40 kernel/events/core.c:9964
perf_trace_run_bpf_submit+0xf7/0x1d0 kernel/events/core.c:9938
perf_trace_preemptirq_template+0x31d/0x430 include/trace/events/preemptirq.h:14
trace_irq_enable_rcuidle+0x10e/0x190 include/trace/events/preemptirq.h:40
trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44
asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:664
RIP: 0010:rcu_read_unlock_special+0x84/0x520 kernel/rcu/tree_plugin.h:671
Code: f1 f1 f1 00 f2 f2 f2 49 89 04 17 66 41 c7 44 17 09 f3 f3 41 c6 44 17 0b f3 65 44 8b 25 bd d0 96 7e 41 f7 c4 00 00 f0 00 74 45 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 3a 00 00 00 00 66 42 c7 44 3a
RSP: 0000:ffffc90000007b00 EFLAGS: 00000206
RAX: 842b5e7665fcbe00 RBX: 1ffff92000000f68 RCX: ffffffff913c6f03
RDX: dffffc0000000000 RSI: ffffffff8a8b0f80 RDI: ffffffff8ad87e00
RBP: ffffc90000007bd8 R08: ffffffff8186a728 R09: ffffed10173474da
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff8c923200
R13: ffff88801e810458 R14: ffffc90000007b40 R15: 1ffff92000000f64
__rcu_read_unlock+0x92/0x100 kernel/rcu/tree_plugin.h:422
rcu_read_unlock include/linux/rcupdate.h:728 [inline]
ieee80211_rx_napi+0x1f2/0x380 net/mac80211/rx.c:5006
ieee80211_rx include/net/mac80211.h:4571 [inline]
ieee80211_tasklet_handler+0x109/0x1b0 net/mac80211/main.c:235
tasklet_action_common+0x3cb/0x4a0
__do_softirq+0x3b3/0x93a kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x155/0x240 kernel/softirq.c:637
irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd4/0x130 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 a2 d3 a3 f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> b7 2d 31 f7 65 8b 05 58 66 dc 75 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0000:ffffc90003037c40 EFLAGS: 00000206
RAX: 842b5e7665fcbe00 RBX: 1ffff92000606f8c RCX: ffffffff913c6f03
RDX: dffffc0000000000 RSI: ffffffff8a8b0f80 RDI: 0000000000000001
RBP: ffffc90003037cd0 R08: ffffffff8186a728 R09: ffffed10173474da
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff92000606f88 R14: ffffc90003037c60 R15: 0000000000000246
debug_object_free+0x280/0x460 lib/debugobjects.c:876
destroy_hrtimer_on_stack kernel/time/hrtimer.c:452 [inline]
hrtimer_nanosleep+0x3ab/0x490 kernel/time/hrtimer.c:2112
__do_sys_clock_nanosleep kernel/time/posix-timers.c:1308 [inline]
__se_sys_clock_nanosleep+0x323/0x3b0 kernel/time/posix-timers.c:1285
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
__se_sys_clock_nanosleep+0x323/0x3b0 kernel/time/posix-timers.c:1285
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fd3605961b5
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 b9 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f ba ff ff 48 8b 04 24 48 83 c4 28 f7 d8
RSP: 002b:00007ffe69188c10 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 0000000000000106 RCX: 00007fd3605961b5
RDX: 00007ffe69188c50 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffe69188cdc R08: 0000000000000000 R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 000000000002af53 R14: 000000000002ac33 R15: 000000000000001e
</TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10505 jiffies! g14529 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=8219
rcu: rcu_preempt kthread starved for 10506 jiffies! g14529 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:I stack:26720 pid: 15 ppid: 2 flags:0x00004000
rcu: RCU grace-period kthread stack dump:
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
schedule+0x11b/0x1f0 kernel/sched/core.c:6459
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1884
rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972
rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
rcu: Stack dump where RCU GP kthread last ran:
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3551 Comm: syz-executor.4 Not tainted 5.15.146-syzkaller #0
NMI backtrace for cpu 0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0xc/0x60 kernel/kcov.c:197
Code: 89 fb e8 17 00 00 00 48 8b 3d 28 75 63 0c 48 89 de 5b e9 97 db 48 00 cc cc cc cc cc cc cc 48 8b 04 24 65 48 8b 0d 74 45 82 7e <65> 8b 15 75 45 82 7e f7 c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74
RSP: 0000:ffffc900000075e0 EFLAGS: 00000046
RAX: ffffffff81a1c4a7 RBX: 0000000000000000 RCX: ffff88801e810000
RDX: ffff88801e810000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8880b9a34568 R08: ffffffff81a1c44d R09: fffffbfff1bc73a6
R10: 0000000000000000 R11: dffffc0000000001 R12: fffffffffffffffe
R13: 0000000000000000 R14: ffff88813fe7c2f0 R15: 0000000000000002
FS: 00005555570fc480(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c01cf28000 CR3: 000000004348d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<IRQ>
perf_swevent_overflow kernel/events/core.c:9508 [inline]
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<IRQ>
perf_swevent_event+0x537/0x550 kernel/events/core.c:9546
perf_tp_event+0x363/0xc40 kernel/events/core.c:9964
perf_trace_run_bpf_submit+0xf7/0x1d0 kernel/events/core.c:9938
perf_trace_preemptirq_template+0x31d/0x430 include/trace/events/preemptirq.h:14
trace_irq_enable_rcuidle+0x10e/0x190 include/trace/events/preemptirq.h:40
trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44
asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:664
RIP: 0010:rcu_read_unlock_special+0x84/0x520 kernel/rcu/tree_plugin.h:671
Code: f1 f1 f1 00 f2 f2 f2 49 89 04 17 66 41 c7 44 17 09 f3 f3 41 c6 44 17 0b f3 65 44 8b 25 bd d0 96 7e 41 f7 c4 00 00 f0 00 74 45 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 3a 00 00 00 00 66 42 c7 44 3a
RSP: 0000:ffffc90000007b00 EFLAGS: 00000206
RAX: 842b5e7665fcbe00 RBX: 1ffff92000000f68 RCX: ffffffff913c6f03
RDX: dffffc0000000000 RSI: ffffffff8a8b0f80 RDI: ffffffff8ad87e00
RBP: ffffc90000007bd8 R08: ffffffff8186a728 R09: ffffed10173474da
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff8c923200
R13: ffff88801e810458 R14: ffffc90000007b40 R15: 1ffff92000000f64
__rcu_read_unlock+0x92/0x100 kernel/rcu/tree_plugin.h:422
rcu_read_unlock include/linux/rcupdate.h:728 [inline]
ieee80211_rx_napi+0x1f2/0x380 net/mac80211/rx.c:5006
ieee80211_rx include/net/mac80211.h:4571 [inline]
ieee80211_tasklet_handler+0x109/0x1b0 net/mac80211/main.c:235
tasklet_action_common+0x3cb/0x4a0
__do_softirq+0x3b3/0x93a kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x155/0x240 kernel/softirq.c:637
irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd4/0x130 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 a2 d3 a3 f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> b7 2d 31 f7 65 8b 05 58 66 dc 75 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0000:ffffc90003037c40 EFLAGS: 00000206
RAX: 842b5e7665fcbe00 RBX: 1ffff92000606f8c RCX: ffffffff913c6f03
RDX: dffffc0000000000 RSI: ffffffff8a8b0f80 RDI: 0000000000000001
RBP: ffffc90003037cd0 R08: ffffffff8186a728 R09: ffffed10173474da
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff92000606f88 R14: ffffc90003037c60 R15: 0000000000000246
debug_object_free+0x280/0x460 lib/debugobjects.c:876
destroy_hrtimer_on_stack kernel/time/hrtimer.c:452 [inline]
hrtimer_nanosleep+0x3ab/0x490 kernel/time/hrtimer.c:2112
__do_sys_clock_nanosleep kernel/time/posix-timers.c:1308 [inline]
__se_sys_clock_nanosleep+0x323/0x3b0 kernel/time/posix-timers.c:1285
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
__se_sys_clock_nanosleep+0x323/0x3b0 kernel/time/posix-timers.c:1285
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fd3605961b5
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 b9 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f ba ff ff 48 8b 04 24 48 83 c4 28 f7 d8
RSP: 002b:00007ffe69188c10 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 0000000000000106 RCX: 00007fd3605961b5
RDX: 00007ffe69188c50 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffe69188cdc R08: 0000000000000000 R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 000000000002af53 R14: 000000000002ac33 R15: 000000000000001e
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