rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 GPs behind) idle=571/1/0x4000000000000000 softirq=38787/38788 fqs=993
(detected by 0, t=10503 jiffies, g=53605, q=1818)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 9717 Comm: syz-executor.5 Not tainted 5.15.138-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
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 18 73 63 0c 48 89 de 5b e9 67 de 48 00 cc cc cc cc cc cc cc 48 8b 04 24 <65> 48 8b 0d 64 4d 82 7e 65 8b 15 65 4d 82 7e f7 c2 00 01 ff 00 74
RSP: 0018:ffffc90000dd0d58 EFLAGS: 00000046
RAX: ffffffff816f3545 RBX: 0000000000000000 RCX: ffff88801b37bb80
RDX: ffff88801b37bb80 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000dd0eb0 R08: ffffffff816f352c R09: fffffbfff1bc7266
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880b9b2a200
R13: ffffffff886a8ac0 R14: ffff888075b88b40 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555556eba788 CR3: 0000000025fc1000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__run_hrtimer kernel/time/hrtimer.c:1683 [inline]
__hrtimer_run_queues+0x565/0xcf0 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
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:unmap_single_vma+0xc3/0x2d0 mm/memory.c:1585
Code: 00 48 89 e8 48 c1 e8 03 48 bb 00 00 00 00 00 fc ff df 48 89 44 24 08 80 3c 18 00 74 08 48 89 ef e8 f2 a8 11 00 48 83 7d 00 00 <74> 23 e8 66 f3 c7 ff 4c 89 ff 4c 89 ee 4c 89 f2 e8 e8 de ed ff eb
RSP: 0018:ffffc9000428f5f8 EFLAGS: 00000286
RAX: 1ffff110091416da RBX: dffffc0000000000 RCX: ffff88801b37bb80
RDX: 0000000000000000 RSI: 00007faae0ff2000 RDI: 00007faae11f2000
RBP: ffff888048a0b6d0 R08: ffffffff81b82eae R09: ffffed1009a4c0a9
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888048a0b638
R13: 00007faae0ff2000 R14: 00007faae11f2000 R15: ffff888048a0b630
unmap_vmas+0x1f8/0x390 mm/memory.c:1642
exit_mmap+0x3b6/0x670 mm/mmap.c:3186
__mmput+0x112/0x3b0 kernel/fork.c:1126
exit_mm+0x688/0x7f0 kernel/exit.c:548
do_exit+0x626/0x2480 kernel/exit.c:859
do_group_exit+0x144/0x310 kernel/exit.c:994
get_signal+0xc66/0x14e0 kernel/signal.c:2889
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:867
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
__syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7faae1a6eae9
Code: Unable to access opcode bytes at RIP 0x7faae1a6eabf.
RSP: 002b:00007faadfff0178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007faae1b8df88 RCX: 00007faae1a6eae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007faae1b8df88
RBP: 00007faae1b8df80 R08: 00007faadfff06c0 R09: 00007faadfff06c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007faae1b8df8c
R13: 000000000000000b R14: 00007ffdbb41a100 R15: 00007ffdbb41a1e8
rcu: rcu_preempt kthread starved for 5535 jiffies! g53605 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:26744 pid: 15 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1884
rcu_gp_fqs_loop+0x2af/0xf70 kernel/rcu/tree.c:1959
rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2132
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0
CPU: 0 PID: 3839 Comm: syz-executor.1 Not tainted 5.15.138-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
Call Trace:
__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:481
print_other_cpu_stall+0x137a/0x14d0 kernel/rcu/tree_stall.h:586
check_cpu_stall kernel/rcu/tree_stall.h:729 [inline]
rcu_pending kernel/rcu/tree.c:3911 [inline]
rcu_sched_clock_irq+0x94f/0x1770 kernel/rcu/tree.c:2606
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
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 3c c6 0b 00 41 83 e7 01 75 07 e8 d1 c2 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:ffffc9000395f680 EFLAGS: 00000293
RAX: ffffffff81745fa4 RBX: 1ffff11017367f31 RCX: ffff888017f73b80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000395f7c0 R08: ffffffff81745f74 R09: fffffbfff1f79c2c
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001
R13: ffff8880b9b3f988 R14: ffff8880b9a3a780 R15: 0000000000000001
on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1135
kill_bdev block/bdev.c:76 [inline]
blkdev_flush_mapping+0x178/0x340 block/bdev.c:659
blkdev_put_whole block/bdev.c:690 [inline]
blkdev_put+0x4f1/0x790 block/bdev.c:954
deactivate_locked_super+0xa0/0x110 fs/super.c:335
cleanup_mnt+0x44e/0x500 fs/namespace.c:1143
task_work_run+0x129/0x1a0 kernel/task_work.c:164
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0x6a3/0x2480 kernel/exit.c:872
do_group_exit+0x144/0x310 kernel/exit.c:994
get_signal+0xc66/0x14e0 kernel/signal.c:2889
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:867
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
__syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f1a82532ef5
Code: Unable to access opcode bytes at RIP 0x7f1a82532ecb.
RSP: 002b:00007f1a80a89010 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007f1a82626f80 RCX: 00007f1a82532ef5
RDX: 00007f1a80a89050 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f1a8255347a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 000000000000000b R14: 00007f1a82626f80 R15: 00007ffd710946b8