[v6.1] INFO: rcu detected stall in kauditd_thread
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syzbot
May 25, 2023, 1:18:03 AM5/25/23
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: a343b0dd87b4 Linux 6.1.30
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=163c9d75280000
kernel config: https://syzkaller.appspot.com/x/.config?x=5265a3c898f3cbbb
dashboard link: https://syzkaller.appspot.com/bug?extid=ee9778136c8aa7225a14
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/195d974b1f1c/disk-a343b0dd.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ea41850547fb/vmlinux-a343b0dd.xz
kernel image: https://storage.googleapis.com/syzbot-assets/13ec9e70ad28/bzImage-a343b0dd.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ee9778...@syzkaller.appspotmail.com
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 ticks this GP) idle=94bc/1/0x4000000000000000 softirq=61086/61086 fqs=0
(detected by 0, t=10502 jiffies, g=91909, q=339 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: kauditd Not tainted 6.1.30-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/16/2023
RIP: 0010:validate_chain+0x27/0x58e0 kernel/locking/lockdep.c:3788
Code: 00 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec 80 02 00 00 49 89 ce 89 54 24 60 48 89 bc 24 80 00 00 00 <65> 48 8b 04 25 28 00 00 00 48 89 84 24 60 02 00 00 49 bc 00 00 00
RSP: 0018:ffffc900001e07a0 EFLAGS: 00000086
RAX: 1ffffffff1ff001c RBX: ffffffff8ff800e0 RCX: 3bee7565ff41f5c5
RDX: 0000000000000001 RSI: ffff888012766448 RDI: ffff888012765940
RBP: ffffc900001e0a50 R08: dffffc0000000000 R09: fffffbfff2051045
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888012766418
R13: ffff888012765940 R14: 3bee7565ff41f5c5 R15: 1ffff110024ecc8d
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555557330848 CR3: 00000000329bd000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
__lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5056
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:306
rcu_read_lock include/linux/rcupdate.h:747 [inline]
advance_sched+0x6ce/0x940 net/sched/sch_taprio.c:753
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x5e5/0xe50 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:649
RIP: 0010:console_emit_next_record+0xb70/0xda0 kernel/printk/printk.c:2740
Code: 00 48 8b 5c 24 68 44 0f b6 74 24 1f 4d 85 e4 75 07 e8 84 05 1c 00 eb 06 e8 7d 05 1c 00 fb 48 c7 84 24 a0 00 00 00 0e 36 e0 45 <41> c7 44 1d 00 00 00 00 00 49 c7 44 1d 0a 00 00 00 00 49 c7 44 1d
RSP: 0018:ffffc90000a3f820 EFLAGS: 00000293
RAX: ffffffff816dbff3 RBX: 1ffff92000147f18 RCX: ffff888012765940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000a3fad0 R08: ffffffff816dbfc9 R09: fffffbfff2051045
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000200
R13: dffffc0000000000 R14: 0000000000000001 R15: ffffc90000a3fb40
console_unlock+0x278/0x6e0 kernel/printk/printk.c:2860
vprintk_emit+0xd1/0x1f0 kernel/printk/printk.c:2268
_printk+0xd1/0x111 kernel/printk/printk.c:2289
kauditd_printk_skb kernel/audit.c:536 [inline]
kauditd_hold_skb+0x1b8/0x200 kernel/audit.c:571
kauditd_send_queue+0x2a3/0x2f0 kernel/audit.c:756
kauditd_thread+0x722/0x960 kernel/audit.c:880
kthread+0x26e/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g91909 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=71874
rcu: rcu_preempt kthread starved for 10502 jiffies! g91909 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:26712 pid:16 ppid:2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x132c/0x4330 kernel/sched/core.c:6554
schedule+0xbf/0x180 kernel/sched/core.c:6630
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1935
rcu_gp_fqs_loop+0x2c2/0x1010 kernel/rcu/tree.c:1661
rcu_gp_kthread+0xa3/0x3a0 kernel/rcu/tree.c:1860
kthread+0x26e/0x300 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:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: kauditd Not tainted 6.1.30-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/16/2023
RIP: 0010:match_held_lock+0x0/0xb0 kernel/locking/lockdep.c:5114
Code: ed 7d d0 03 00 75 cf 48 c7 c7 40 cf eb 8a 48 c7 c6 80 cf eb 8a e8 20 6e cf f6 0f 0b eb b6 e8 e7 fa ff ff 0f 1f 80 00 00 00 00 <55> 53 bd 01 00 00 00 48 39 77 10 74 67 48 89 fb 81 7f 20 00 00 10
RSP: 0018:ffffc900001e0c70 EFLAGS: 00000083
RAX: 0000000000000002 RBX: 0000000000000001 RCX: ffff888012765940
RDX: ffff888012765940 RSI: ffff88803ed4a300 RDI: ffff888012766448
RBP: ffff888012766448 R08: ffffffff88b510fe R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 0000000000000046
R13: ffff888012765940 R14: 00000000ffffffff R15: ffff88803ed4a300
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555557330848 CR3: 00000000329bd000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
__lock_is_held kernel/locking/lockdep.c:5410 [inline]
lock_is_held_type+0xa4/0x180 kernel/locking/lockdep.c:5712
lock_is_held include/linux/lockdep.h:283 [inline]
advance_sched+0xd0/0x940 net/sched/sch_taprio.c:703
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x5e5/0xe50 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:649
RIP: 0010:console_emit_next_record+0xb70/0xda0 kernel/printk/printk.c:2740
Code: 00 48 8b 5c 24 68 44 0f b6 74 24 1f 4d 85 e4 75 07 e8 84 05 1c 00 eb 06 e8 7d 05 1c 00 fb 48 c7 84 24 a0 00 00 00 0e 36 e0 45 <41> c7 44 1d 00 00 00 00 00 49 c7 44 1d 0a 00 00 00 00 49 c7 44 1d
RSP: 0018:ffffc90000a3f820 EFLAGS: 00000293
RAX: ffffffff816dbff3 RBX: 1ffff92000147f18 RCX: ffff888012765940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000a3fad0 R08: ffffffff816dbfc9 R09: fffffbfff2051045
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000200
R13: dffffc0000000000 R14: 0000000000000001 R15: ffffc90000a3fb40
console_unlock+0x278/0x6e0 kernel/printk/printk.c:2860
vprintk_emit+0xd1/0x1f0 kernel/printk/printk.c:2268
_printk+0xd1/0x111 kernel/printk/printk.c:2289
kauditd_printk_skb kernel/audit.c:536 [inline]
kauditd_hold_skb+0x1b8/0x200 kernel/audit.c:571
kauditd_send_queue+0x2a3/0x2f0 kernel/audit.c:756
kauditd_thread+0x722/0x960 kernel/audit.c:880
kthread+0x26e/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
watchdog: BUG: soft lockup - CPU#0 stuck for 246s! [syz-executor.1:14707]
Modules linked in:
irq event stamp: 2191706
hardirqs last enabled at (2191705): [<ffffffff8aa00cc6>] asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
hardirqs last disabled at (2191706): [<ffffffff8a82baea>] sysvec_apic_timer_interrupt+0xa/0xb0 arch/x86/kernel/apic/apic.c:1106
softirqs last enabled at (2141812): [<ffffffff8153c6d5>] invoke_softirq kernel/softirq.c:445 [inline]
softirqs last enabled at (2141812): [<ffffffff8153c6d5>] __irq_exit_rcu+0x155/0x240 kernel/softirq.c:650
softirqs last disabled at (2141743): [<ffffffff8153c6d5>] invoke_softirq kernel/softirq.c:445 [inline]
softirqs last disabled at (2141743): [<ffffffff8153c6d5>] __irq_exit_rcu+0x155/0x240 kernel/softirq.c:650
CPU: 0 PID: 14707 Comm: syz-executor.1 Not tainted 6.1.30-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/16/2023
RIP: 0010:smp_call_function_many_cond+0x1f7d/0x33d0 kernel/smp.c:987
Code: df 75 0a e8 e5 08 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 e8 c3 08 0b 00 <eb> e1 44 89 f9 80 e1 07 80 c1 03 38 c1 7c df 4c 89 ff e8 dc 4f 61
RSP: 0000:ffffc900052af3a0 EFLAGS: 00000293
RAX: ffffffff817ebcad RBX: 1ffff11017328021 RCX: ffff88803f5f9dc0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900052af780 R08: ffffffff817ebc76 R09: fffffbfff205104b
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000800000000
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff8880b9940108
FS: 0000555557327400(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3f3e6e7bc3 CR3: 00000000329bd000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1155
__flush_tlb_multi arch/x86/include/asm/paravirt.h:87 [inline]
flush_tlb_multi arch/x86/mm/tlb.c:924 [inline]
flush_tlb_mm_range+0x353/0x590 arch/x86/mm/tlb.c:1010
dup_mmap kernel/fork.c:711 [inline]
dup_mm+0x1106/0x1610 kernel/fork.c:1532
copy_mm+0xca/0x160 kernel/fork.c:1581
copy_process+0x19a2/0x4020 kernel/fork.c:2259
kernel_clone+0x222/0x920 kernel/fork.c:2679
__do_sys_clone kernel/fork.c:2820 [inline]
__se_sys_clone kernel/fork.c:2804 [inline]
__x64_sys_clone+0x231/0x280 kernel/fork.c:2804
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f416ba89e9b
Code: ed 0f 85 60 01 00 00 64 4c 8b 0c 25 10 00 00 00 45 31 c0 4d 8d 91 d0 02 00 00 31 d2 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 89 00 00 00 41 89 c5 85 c0 0f 85 90 00 00
RSP: 002b:00007ffd1ba34a60 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f416ba89e9b
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000555557327400
R10: 00005555573276d0 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffd1ba34b40
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: kauditd Not tainted 6.1.30-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/16/2023
RIP: 0010:cpu_max_bits_warn include/linux/cpumask.h:110 [inline]
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_expire_entry include/trace/events/timer.h:235 [inline]
RIP: 0010:__run_hrtimer kernel/time/hrtimer.c:1682 [inline]
RIP: 0010:__hrtimer_run_queues+0x4ed/0xe50 kernel/time/hrtimer.c:1749
Code: 8b 44 24 30 42 0f b6 04 38 84 c0 0f 85 74 04 00 00 8b 1d ce ea d9 0c 89 df 44 89 ee e8 9c 99 10 00 44 39 eb 0f 86 fc 02 00 00 <e8> 2e 98 10 00 45 89 ef 4c 89 f8 48 c1 e8 06 48 8d 3c c5 e8 15 53
RSP: 0018:ffffc900001e0d60 EFLAGS: 00000002
RAX: 0000000000010001 RBX: 0000000000000002 RCX: ffff888012765940
RDX: ffff888012765940 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffc900001e0eb0 R08: ffffffff81792d34 R09: ffffed1017325499
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff88b51040
R13: 0000000000000001 R14: ffff8880b992a4c0 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555557330848 CR3: 00000000329bd000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
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:649
RIP: 0010:console_emit_next_record+0xb70/0xda0 kernel/printk/printk.c:2740
Code: 00 48 8b 5c 24 68 44 0f b6 74 24 1f 4d 85 e4 75 07 e8 84 05 1c 00 eb 06 e8 7d 05 1c 00 fb 48 c7 84 24 a0 00 00 00 0e 36 e0 45 <41> c7 44 1d 00 00 00 00 00 49 c7 44 1d 0a 00 00 00 00 49 c7 44 1d
RSP: 0018:ffffc90000a3f820 EFLAGS: 00000293
RAX: ffffffff816dbff3 RBX: 1ffff92000147f18 RCX: ffff888012765940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000a3fad0 R08: ffffffff816dbfc9 R09: fffffbfff2051045
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000200
R13: dffffc0000000000 R14: 0000000000000001 R15: ffffc90000a3fb40
console_unlock+0x278/0x6e0 kernel/printk/printk.c:2860
vprintk_emit+0xd1/0x1f0 kernel/printk/printk.c:2268
_printk+0xd1/0x111 kernel/printk/printk.c:2289
kauditd_printk_skb kernel/audit.c:536 [inline]
kauditd_hold_skb+0x1b8/0x200 kernel/audit.c:571
kauditd_send_queue+0x2a3/0x2f0 kernel/audit.c:756
kauditd_thread+0x722/0x960 kernel/audit.c:880
kthread+0x26e/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
---
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If the bug is already fixed, let syzbot know by replying with:
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If the bug is a duplicate of another bug, reply with:
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If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: a343b0dd87b4 Linux 6.1.30
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=163c9d75280000
kernel config: https://syzkaller.appspot.com/x/.config?x=5265a3c898f3cbbb
dashboard link: https://syzkaller.appspot.com/bug?extid=ee9778136c8aa7225a14
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/195d974b1f1c/disk-a343b0dd.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ea41850547fb/vmlinux-a343b0dd.xz
kernel image: https://storage.googleapis.com/syzbot-assets/13ec9e70ad28/bzImage-a343b0dd.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ee9778...@syzkaller.appspotmail.com
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 ticks this GP) idle=94bc/1/0x4000000000000000 softirq=61086/61086 fqs=0
(detected by 0, t=10502 jiffies, g=91909, q=339 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: kauditd Not tainted 6.1.30-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/16/2023
RIP: 0010:validate_chain+0x27/0x58e0 kernel/locking/lockdep.c:3788
Code: 00 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec 80 02 00 00 49 89 ce 89 54 24 60 48 89 bc 24 80 00 00 00 <65> 48 8b 04 25 28 00 00 00 48 89 84 24 60 02 00 00 49 bc 00 00 00
RSP: 0018:ffffc900001e07a0 EFLAGS: 00000086
RAX: 1ffffffff1ff001c RBX: ffffffff8ff800e0 RCX: 3bee7565ff41f5c5
RDX: 0000000000000001 RSI: ffff888012766448 RDI: ffff888012765940
RBP: ffffc900001e0a50 R08: dffffc0000000000 R09: fffffbfff2051045
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888012766418
R13: ffff888012765940 R14: 3bee7565ff41f5c5 R15: 1ffff110024ecc8d
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555557330848 CR3: 00000000329bd000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
__lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5056
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:306
rcu_read_lock include/linux/rcupdate.h:747 [inline]
advance_sched+0x6ce/0x940 net/sched/sch_taprio.c:753
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x5e5/0xe50 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:649
RIP: 0010:console_emit_next_record+0xb70/0xda0 kernel/printk/printk.c:2740
Code: 00 48 8b 5c 24 68 44 0f b6 74 24 1f 4d 85 e4 75 07 e8 84 05 1c 00 eb 06 e8 7d 05 1c 00 fb 48 c7 84 24 a0 00 00 00 0e 36 e0 45 <41> c7 44 1d 00 00 00 00 00 49 c7 44 1d 0a 00 00 00 00 49 c7 44 1d
RSP: 0018:ffffc90000a3f820 EFLAGS: 00000293
RAX: ffffffff816dbff3 RBX: 1ffff92000147f18 RCX: ffff888012765940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000a3fad0 R08: ffffffff816dbfc9 R09: fffffbfff2051045
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000200
R13: dffffc0000000000 R14: 0000000000000001 R15: ffffc90000a3fb40
console_unlock+0x278/0x6e0 kernel/printk/printk.c:2860
vprintk_emit+0xd1/0x1f0 kernel/printk/printk.c:2268
_printk+0xd1/0x111 kernel/printk/printk.c:2289
kauditd_printk_skb kernel/audit.c:536 [inline]
kauditd_hold_skb+0x1b8/0x200 kernel/audit.c:571
kauditd_send_queue+0x2a3/0x2f0 kernel/audit.c:756
kauditd_thread+0x722/0x960 kernel/audit.c:880
kthread+0x26e/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g91909 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=71874
rcu: rcu_preempt kthread starved for 10502 jiffies! g91909 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:26712 pid:16 ppid:2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x132c/0x4330 kernel/sched/core.c:6554
schedule+0xbf/0x180 kernel/sched/core.c:6630
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1935
rcu_gp_fqs_loop+0x2c2/0x1010 kernel/rcu/tree.c:1661
rcu_gp_kthread+0xa3/0x3a0 kernel/rcu/tree.c:1860
kthread+0x26e/0x300 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:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: kauditd Not tainted 6.1.30-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/16/2023
RIP: 0010:match_held_lock+0x0/0xb0 kernel/locking/lockdep.c:5114
Code: ed 7d d0 03 00 75 cf 48 c7 c7 40 cf eb 8a 48 c7 c6 80 cf eb 8a e8 20 6e cf f6 0f 0b eb b6 e8 e7 fa ff ff 0f 1f 80 00 00 00 00 <55> 53 bd 01 00 00 00 48 39 77 10 74 67 48 89 fb 81 7f 20 00 00 10
RSP: 0018:ffffc900001e0c70 EFLAGS: 00000083
RAX: 0000000000000002 RBX: 0000000000000001 RCX: ffff888012765940
RDX: ffff888012765940 RSI: ffff88803ed4a300 RDI: ffff888012766448
RBP: ffff888012766448 R08: ffffffff88b510fe R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 0000000000000046
R13: ffff888012765940 R14: 00000000ffffffff R15: ffff88803ed4a300
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555557330848 CR3: 00000000329bd000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
__lock_is_held kernel/locking/lockdep.c:5410 [inline]
lock_is_held_type+0xa4/0x180 kernel/locking/lockdep.c:5712
lock_is_held include/linux/lockdep.h:283 [inline]
advance_sched+0xd0/0x940 net/sched/sch_taprio.c:703
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x5e5/0xe50 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:649
RIP: 0010:console_emit_next_record+0xb70/0xda0 kernel/printk/printk.c:2740
Code: 00 48 8b 5c 24 68 44 0f b6 74 24 1f 4d 85 e4 75 07 e8 84 05 1c 00 eb 06 e8 7d 05 1c 00 fb 48 c7 84 24 a0 00 00 00 0e 36 e0 45 <41> c7 44 1d 00 00 00 00 00 49 c7 44 1d 0a 00 00 00 00 49 c7 44 1d
RSP: 0018:ffffc90000a3f820 EFLAGS: 00000293
RAX: ffffffff816dbff3 RBX: 1ffff92000147f18 RCX: ffff888012765940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000a3fad0 R08: ffffffff816dbfc9 R09: fffffbfff2051045
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000200
R13: dffffc0000000000 R14: 0000000000000001 R15: ffffc90000a3fb40
console_unlock+0x278/0x6e0 kernel/printk/printk.c:2860
vprintk_emit+0xd1/0x1f0 kernel/printk/printk.c:2268
_printk+0xd1/0x111 kernel/printk/printk.c:2289
kauditd_printk_skb kernel/audit.c:536 [inline]
kauditd_hold_skb+0x1b8/0x200 kernel/audit.c:571
kauditd_send_queue+0x2a3/0x2f0 kernel/audit.c:756
kauditd_thread+0x722/0x960 kernel/audit.c:880
kthread+0x26e/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
watchdog: BUG: soft lockup - CPU#0 stuck for 246s! [syz-executor.1:14707]
Modules linked in:
irq event stamp: 2191706
hardirqs last enabled at (2191705): [<ffffffff8aa00cc6>] asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
hardirqs last disabled at (2191706): [<ffffffff8a82baea>] sysvec_apic_timer_interrupt+0xa/0xb0 arch/x86/kernel/apic/apic.c:1106
softirqs last enabled at (2141812): [<ffffffff8153c6d5>] invoke_softirq kernel/softirq.c:445 [inline]
softirqs last enabled at (2141812): [<ffffffff8153c6d5>] __irq_exit_rcu+0x155/0x240 kernel/softirq.c:650
softirqs last disabled at (2141743): [<ffffffff8153c6d5>] invoke_softirq kernel/softirq.c:445 [inline]
softirqs last disabled at (2141743): [<ffffffff8153c6d5>] __irq_exit_rcu+0x155/0x240 kernel/softirq.c:650
CPU: 0 PID: 14707 Comm: syz-executor.1 Not tainted 6.1.30-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/16/2023
RIP: 0010:smp_call_function_many_cond+0x1f7d/0x33d0 kernel/smp.c:987
Code: df 75 0a e8 e5 08 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 e8 c3 08 0b 00 <eb> e1 44 89 f9 80 e1 07 80 c1 03 38 c1 7c df 4c 89 ff e8 dc 4f 61
RSP: 0000:ffffc900052af3a0 EFLAGS: 00000293
RAX: ffffffff817ebcad RBX: 1ffff11017328021 RCX: ffff88803f5f9dc0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900052af780 R08: ffffffff817ebc76 R09: fffffbfff205104b
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000800000000
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff8880b9940108
FS: 0000555557327400(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3f3e6e7bc3 CR3: 00000000329bd000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1155
__flush_tlb_multi arch/x86/include/asm/paravirt.h:87 [inline]
flush_tlb_multi arch/x86/mm/tlb.c:924 [inline]
flush_tlb_mm_range+0x353/0x590 arch/x86/mm/tlb.c:1010
dup_mmap kernel/fork.c:711 [inline]
dup_mm+0x1106/0x1610 kernel/fork.c:1532
copy_mm+0xca/0x160 kernel/fork.c:1581
copy_process+0x19a2/0x4020 kernel/fork.c:2259
kernel_clone+0x222/0x920 kernel/fork.c:2679
__do_sys_clone kernel/fork.c:2820 [inline]
__se_sys_clone kernel/fork.c:2804 [inline]
__x64_sys_clone+0x231/0x280 kernel/fork.c:2804
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f416ba89e9b
Code: ed 0f 85 60 01 00 00 64 4c 8b 0c 25 10 00 00 00 45 31 c0 4d 8d 91 d0 02 00 00 31 d2 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 89 00 00 00 41 89 c5 85 c0 0f 85 90 00 00
RSP: 002b:00007ffd1ba34a60 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f416ba89e9b
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000555557327400
R10: 00005555573276d0 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffd1ba34b40
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: kauditd Not tainted 6.1.30-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/16/2023
RIP: 0010:cpu_max_bits_warn include/linux/cpumask.h:110 [inline]
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_expire_entry include/trace/events/timer.h:235 [inline]
RIP: 0010:__run_hrtimer kernel/time/hrtimer.c:1682 [inline]
RIP: 0010:__hrtimer_run_queues+0x4ed/0xe50 kernel/time/hrtimer.c:1749
Code: 8b 44 24 30 42 0f b6 04 38 84 c0 0f 85 74 04 00 00 8b 1d ce ea d9 0c 89 df 44 89 ee e8 9c 99 10 00 44 39 eb 0f 86 fc 02 00 00 <e8> 2e 98 10 00 45 89 ef 4c 89 f8 48 c1 e8 06 48 8d 3c c5 e8 15 53
RSP: 0018:ffffc900001e0d60 EFLAGS: 00000002
RAX: 0000000000010001 RBX: 0000000000000002 RCX: ffff888012765940
RDX: ffff888012765940 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffc900001e0eb0 R08: ffffffff81792d34 R09: ffffed1017325499
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff88b51040
R13: 0000000000000001 R14: ffff8880b992a4c0 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555557330848 CR3: 00000000329bd000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
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:649
RIP: 0010:console_emit_next_record+0xb70/0xda0 kernel/printk/printk.c:2740
Code: 00 48 8b 5c 24 68 44 0f b6 74 24 1f 4d 85 e4 75 07 e8 84 05 1c 00 eb 06 e8 7d 05 1c 00 fb 48 c7 84 24 a0 00 00 00 0e 36 e0 45 <41> c7 44 1d 00 00 00 00 00 49 c7 44 1d 0a 00 00 00 00 49 c7 44 1d
RSP: 0018:ffffc90000a3f820 EFLAGS: 00000293
RAX: ffffffff816dbff3 RBX: 1ffff92000147f18 RCX: ffff888012765940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000a3fad0 R08: ffffffff816dbfc9 R09: fffffbfff2051045
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000200
R13: dffffc0000000000 R14: 0000000000000001 R15: ffffc90000a3fb40
console_unlock+0x278/0x6e0 kernel/printk/printk.c:2860
vprintk_emit+0xd1/0x1f0 kernel/printk/printk.c:2268
_printk+0xd1/0x111 kernel/printk/printk.c:2289
kauditd_printk_skb kernel/audit.c:536 [inline]
kauditd_hold_skb+0x1b8/0x200 kernel/audit.c:571
kauditd_send_queue+0x2a3/0x2f0 kernel/audit.c:756
kauditd_thread+0x722/0x960 kernel/audit.c:880
kthread+0x26e/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</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:
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If the bug is already fixed, let syzbot know by replying with:
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If you want to change bug's subsystems, reply with:
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If the bug is a duplicate of another bug, reply with:
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If you want to undo deduplication, reply with:
#syz undup
syzbot
Nov 27, 2023, 1:59:17 AM11/27/23
to syzkaller...@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.
syzbot
Dec 5, 2023, 6:06:23 PM12/5/23
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 9b91d36ba301 Linux 5.15.141
syzbot found the following issue on:
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=167afe30e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=31f4c22724493853
dashboard link: https://syzkaller.appspot.com/bug?extid=504eda4f4e0136ffbfde
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:
vmlinux: https://storage.googleapis.com/syzbot-assets/191387cf41a2/vmlinux-9b91d36b.xz
kernel image: https://storage.googleapis.com/syzbot-assets/8d074d8a66a4/bzImage-9b91d36b.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 0, t=10504 jiffies, g=36689, q=154)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 25 Comm: kauditd Not tainted 5.15.141-syzkaller #0
NMI backtrace for cpu 1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:kasan_check_range+0x1b0/0x290 mm/kasan/generic.c:189
Code: 8d 5d 07 48 85 ed 48 0f 49 dd 48 83 e3 f8 48 29 dd 74 12 41 80 39 00 0f 85 a2 00 00 00 49 ff c1 48 ff cd 75 ee 5b 41 5e 41 5f <5d> c3 45 84 f6 75 61 41 f7 c6 00 ff 00 00 75 5d 41 f7 c6 00 00 ff
RSP: 0018:ffffc90000dd0a50 EFLAGS: 00000056
RAX: 0000000000000001 RBX: 00000000000009df RCX: ffffffff816296a9
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8fbce1f8
RBP: 0000000000000001 R08: dffffc0000000000 R09: fffffbfff1f79c40
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001
R13: ffff8880167fa8a8 R14: ffff8880167f9dc0 R15: ffff8880167fa8f8
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020404030 CR3: 00000000234f3000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
</NMI>
<IRQ>
instrument_atomic_read include/linux/instrumented.h:71 [inline]
test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
hlock_class kernel/locking/lockdep.c:197 [inline]
__lock_acquire+0x1209/0x1ff0 kernel/locking/lockdep.c:5009
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:363 [inline]
advance_sched+0x47/0x940 net/sched/sch_taprio.c:716
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x598/0xcf0 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
__sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
sysvec_apic_timer_interrupt+0x8c/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:console_unlock+0xe53/0x12b0 kernel/printk/printk.c:2743
Code: 00 48 83 7c 24 18 00 75 19 e8 39 f7 19 00 eb 18 e8 32 f7 19 00 e8 3d aa b5 08 48 83 7c 24 18 00 74 e7 e8 20 f7 19 00 fb 31 ff <44> 89 f6 e8 75 fa 19 00 31 db 45 85 f6 0f 95 c0 89 c1 0a 4c 24 17
RSP: 0018:ffffc90000e0f920 EFLAGS: 00000246
RAX: ffffffff81662e70 RBX: 0000000000000000 RCX: ffff8880167f9dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000e0fbb0 R08: ffffffff81662e3b R09: fffffbfff1f79c19
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffffffff1a4986e
R13: ffffffff8d24c3a8 R14: 0000000000000000 R15: dffffc0000000000
vprintk_emit+0xbf/0x150 kernel/printk/printk.c:2268
_printk+0xd1/0x111 kernel/printk/printk.c:2293
kauditd_printk_skb kernel/audit.c:538 [inline]
kauditd_hold_skb+0x1b5/0x200 kernel/audit.c:573
kauditd_send_queue+0x2a3/0x2f0 kernel/audit.c:758
kauditd_thread+0x6fb/0xae0 kernel/audit.c:882
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
rcu: rcu_preempt kthread starved for 10501 jiffies! g36689 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R running task stack:26200 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:
NMI backtrace for cpu 0
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 3592 Comm: kworker/0:8 Not tainted 5.15.141-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Workqueue: events bpf_prog_free_deferred
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
rcu_check_gp_kthread_starvation+0x1d2/0x240 kernel/rcu/tree_stall.h:487
print_other_cpu_stall+0x137a/0x14d0 kernel/rcu/tree_stall.h:592
check_cpu_stall kernel/rcu/tree_stall.h:745 [inline]
rcu_pending kernel/rcu/tree.c:3932 [inline]
rcu_sched_clock_irq+0xa38/0x1150 kernel/rcu/tree.c:2619
update_process_times+0x196/0x200 kernel/time/timer.c:1788
tick_sched_handle kernel/time/tick-sched.c:254 [inline]
tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1473
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
__sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
sysvec_apic_timer_interrupt+0x8c/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:csd_lock_wait kernel/smp.c:440 [inline]
RIP: 0010:smp_call_function_many_cond+0xa93/0xd90 kernel/smp.c:969
Code: 04 03 84 c0 0f 85 84 00 00 00 45 8b 7d 00 44 89 fe 83 e6 01 31 ff e8 7c c6 0b 00 41 83 e7 01 75 07 e8 11 c3 0b 00 eb 41 f3 90 <48> b8 00 00 00 00 00 fc ff df 0f b6 04 03 84 c0 75 11 41 f7 45 00
RSP: 0018:ffffc900031c78a0 EFLAGS: 00000293
RAX: ffffffff817462a4 RBX: 1ffff11017367f31 RCX: ffff888017123b80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900031c79e0 R08: ffffffff81746274 R09: fffffbfff1f79c1a
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001
R13: ffff8880b9b3f988 R14: ffff8880b9a3a780 R15: 0000000000000001
on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1135
__purge_vmap_area_lazy+0x294/0x1740 mm/vmalloc.c:1683
_vm_unmap_aliases+0x453/0x4e0 mm/vmalloc.c:2107
vm_remove_mappings mm/vmalloc.c:2584 [inline]
__vunmap+0x72e/0xa20 mm/vmalloc.c:2611
bpf_jit_binary_free kernel/bpf/core.c:914 [inline]
bpf_jit_free+0x92/0x180 kernel/bpf/core.c:927
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
---
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This report is generated by a bot. It may contain errors.
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https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
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Mar 31, 2024, 6:45:17 PMMar 31
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