rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (1 GPs behind) idle=1b9/1/0x4000000000000000 softirq=8801/8804 fqs=0
(t=10500 jiffies g=10253 q=232)
rcu: rcu_preempt kthread starved for 10500 jiffies! g10253 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:26712 pid: 15 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5027 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
schedule+0x11b/0x1f0 kernel/sched/core.c:6456
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1914
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:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
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: 4775 Comm: syz-executor.3 Not tainted 5.15.178-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:207 [inline]
RIP: 0010:test_bit include/asm-generic/bitops/instrumented-non-atomic.h:135 [inline]
RIP: 0010:test_ti_thread_flag include/linux/thread_info.h:118 [inline]
RIP: 0010:test_tsk_thread_flag include/linux/sched.h:1996 [inline]
RIP: 0010:task_sigpending include/linux/sched/signal.h:364 [inline]
RIP: 0010:__set_task_blocked kernel/signal.c:3052 [inline]
RIP: 0010:__set_current_blocked+0x13d/0x2f0 kernel/signal.c:3087
Code: 09 00 00 e8 75 68 f8 08 4c 89 ef be 08 00 00 00 e8 88 ec 79 00 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 08 4c 89 ef e8 d9 ea 79 00 49 8b 5d 00 48 89 de 48 83 e6 04 31
RSP: 0018:ffffc9000307fa60 EFLAGS: 00000046
RAX: 1ffff110045a0770 RBX: ffff888022d044a8 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888022d03b80
RBP: ffffc9000307fb30 R08: dffffc0000000000 R09: ffffed10045a0771
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff110045a0896
R13: ffff888022d03b80 R14: 1ffff9200060ff70 R15: 1ffff110045a0895
FS: 00007f1d195e26c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1d195e1d80 CR3: 0000000065330000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
set_current_blocked kernel/signal.c:3072 [inline]
signal_delivered kernel/signal.c:2936 [inline]
signal_setup_done+0x397/0x5f0 kernel/signal.c:2947
handle_signal arch/x86/kernel/signal.c:842 [inline]
arch_do_signal_or_restart+0x14a1/0x1890 arch/x86/kernel/signal.c:869
handle_signal_work kernel/entry/common.c:154 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:178
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f1d1a2895f0
Code: 83 c0 16 83 e0 f7 74 12 50 48 8d 3d 3a 9a 04 00 e8 45 78 fa ff 0f 1f 44 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <83> ff 21 74 0b c3 66 2e 0f 1f 84 00 00 00 00 00 55 53 48 89 f3 48
RSP: 002b:00007f1d195e1bb8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007f1d1a38ff88 RCX: 00007f1d1a261e69
RDX: 00007f1d195e1bc0 RSI: 00007f1d195e1cf0 RDI: 0000000000000021
RBP: 00007f1d1a38ff80 R08: 00007f1d195e26c0 R09: 00007f1d195e26c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1d1a38ff8c
R13: 000000000000000b R14: 00007ffcf8a30800 R15: 00007ffcf8a308e8
NMI backtrace for cpu 1
sched: RT throttling activated
CPU: 1 PID: 4767 Comm: syz-executor.4 Not tainted 5.15.178-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 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_dump_cpu_stacks+0x223/0x390 kernel/rcu/tree_stall.h:349
print_cpu_stall+0x320/0x600 kernel/rcu/tree_stall.h:633
check_cpu_stall kernel/rcu/tree_stall.h:727 [inline]
rcu_pending kernel/rcu/tree.c:3932 [inline]
rcu_sched_clock_irq+0x8d9/0x1150 kernel/rcu/tree.c:2619
update_process_times+0x196/0x200 kernel/time/timer.c:1818
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:1688 [inline]
__hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1752
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1814
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
__sysvec_apic_timer_interrupt+0x13b/0x4b0 arch/x86/kernel/apic/apic.c:1114
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: 31 61 f6 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 0e 05 1a f7 48 89 df e8 66 59 1b f7 e8 b1 15 3e f7 fb bf 01 00 00 00 66 9e 0e f7 65 8b 05 77 81 b9 75 85 c0 74 02 5b c3 e8 44 9e b7
RSP: 0018:ffffc90002eefbc0 EFLAGS: 00000282
RAX: 293b7e8c666ad800 RBX: ffff888067e3c0c0 RCX: ffffffff96a92f03
RDX: dffffc0000000000 RSI: ffffffff8aab2b80 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff81870420 R09: ffffed100cfc7819
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000021
R13: dffffc0000000000 R14: ffff888067e3c558 R15: ffff888067e3c0c0
spin_unlock_irq include/linux/spinlock.h:413 [inline]
get_signal+0x13ee/0x14e0 kernel/signal.c:2903
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:867
handle_signal_work kernel/entry/common.c:154 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:178
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f3119234e67
Code: 14 25 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 <0f> 05 48 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89
RSP: 002b:00007f31185b5178 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007f3119362f88 RCX: 00007f3119234e69
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f3119362f88
RBP: 00007f3119362f80 R08: 00007f31185b56c0 R09: 00007f31185b56c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3119362f8c
R13: 000000000000000b R14: 00007ffcc4ab0270 R15: 00007ffcc4ab0358