rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (1 GPs behind) idle=fdd/1/0x4000000000000000 softirq=327880/327881 fqs=927
(t=10500 jiffies g=533289 q=26445)
rcu: rcu_preempt kthread starved for 7849 jiffies! g533289 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:28696 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6250
schedule+0xd2/0x260 kernel/sched/core.c:6323
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1955
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2128
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
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: 1003 Comm: syz-executor.0 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__perf_event_overflow+0x18d/0x3d0 kernel/events/core.c:9209
Code: 00 00 48 85 ed 48 0f 44 eb e8 3f 3c e1 ff 48 b8 00 00 00 00 00 fc ff df 48 8d bd 20 04 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 05 02 00 00 48 83 bd 20 04 00 00 00 74 42 e8 0e 3c e1 ff 4c
RSP: 0018:ffffc90000dc0bf8 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffff88802c8c5820 RCX: 0000000000000000
RDX: 1ffff11005918b88 RSI: ffffffff81968871 RDI: ffff88802c8c5c40
RBP: ffff88802c8c5820 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88802c8c5c4c
R13: ffffc90000dc0c80 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f91fca9d700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3062e000 CR3: 00000000b0762000 CR4: 0000000000350ee0
Call Trace:
perf_swevent_hrtimer+0x37c/0x3f0 kernel/events/core.c:10597
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:rcu_lockdep_current_cpu_online+0xde/0x150 kernel/rcu/tree.c:1175
Code: 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 66 48 8b 45 70 48 85 c3 74 11 b8 01 00 00 00 65 ff 0d b4 25 9f 7e 74 2a <5b> 5d c3 48 8d 7d 78 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc900066278a0 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000002 RCX: ffffffff815cd891
RDX: 1ffffffff17318fe RSI: 0000000000000002 RDI: ffffffff8b98c7f0
RBP: ffffffff8b98c780 R08: 0000000000000000 R09: ffffffff8d6fc1d7
R10: fffffbfff1adf83a R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000400cc0 R14: 0000000000000020 R15: ffffffff81e32407
rcu_read_lock_held_common kernel/rcu/update.c:112 [inline]
rcu_read_lock_held_common kernel/rcu/update.c:102 [inline]
rcu_read_lock_sched_held+0x25/0x70 kernel/rcu/update.c:123
trace_lock_release include/trace/events/lock.h:58 [inline]
lock_release+0x522/0x720 kernel/locking/lockdep.c:5651
might_alloc include/linux/sched/mm.h:228 [inline]
slab_pre_alloc_hook mm/slab.h:492 [inline]
slab_alloc_node mm/slub.c:3148 [inline]
slab_alloc mm/slub.c:3242 [inline]
kmem_cache_alloc_trace+0x42/0x2c0 mm/slub.c:3259
kmalloc include/linux/slab.h:590 [inline]
io_add_buffers fs/io_uring.c:4405 [inline]
io_provide_buffers fs/io_uring.c:4439 [inline]
io_issue_sqe+0x2887/0x7010 fs/io_uring.c:6705
__io_queue_sqe fs/io_uring.c:6978 [inline]
io_queue_sqe fs/io_uring.c:7020 [inline]
io_submit_sqe fs/io_uring.c:7223 [inline]
io_submit_sqes+0x1bca/0x8a20 fs/io_uring.c:7329
__do_sys_io_uring_enter+0xf6e/0x1f50 fs/io_uring.c:10043
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f91ff527ae9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f91fca9d188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: ffffffffffffffda RBX: 00007f91ff63af60 RCX: 00007f91ff527ae9
RDX: 0000000000000000 RSI: 00000000000002ff RDI: 0000000000000006
RBP: 00007f91ff581f25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd59c6740f R14: 00007f91fca9d300 R15: 0000000000022000
NMI backtrace for cpu 0
CPU: 0 PID: 16892 Comm: kworker/u4:7 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound io_ring_exit_work
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343
print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
rcu_pending kernel/rcu/tree.c:3878 [inline]
rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2597
update_process_times+0x16d/0x200 kernel/time/timer.c:1785
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1421
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:unwind_next_frame+0xea9/0x1ce0 arch/x86/kernel/unwind_orc.c:616
Code: 7e 34 4c 89 f7 4c 01 e6 e8 24 f0 ff ff 84 c0 0f 84 10 f5 ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 0f b6 04 02 <84> c0 74 08 3c 03 0f 8e 90 0a 00 00 41 3b 2e 0f 84 b9 05 00 00 bf
RSP: 0018:ffffc900055ff638 EFLAGS: 00000216
RAX: 0000000000000000 RBX: 1ffff92000abfecf RCX: 0000000000000003
RDX: 1ffff92000abfee2 RSI: 0000000000000001 RDI: ffffc900055ff768
RBP: 0000000000000001 R08: ffffffff8dee9bc6 R09: 0000000000000001
R10: fffff52000abfeed R11: 0000000000086089 R12: ffffc900055ff838
R13: ffffc900055ff745 R14: ffffc900055ff710 R15: ffffffff8dee9bca
arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38
kasan_set_track+0x21/0x30 mm/kasan/common.c:46
kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
____kasan_slab_free mm/kasan/common.c:366 [inline]
____kasan_slab_free mm/kasan/common.c:328 [inline]
__kasan_slab_free+0xff/0x130 mm/kasan/common.c:374
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:1723 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1749
slab_free mm/slub.c:3513 [inline]
kfree+0xf6/0x560 mm/slub.c:4561
__io_remove_buffers.part.0+0x115/0x220 fs/io_uring.c:4327
__io_remove_buffers fs/io_uring.c:9263 [inline]
io_destroy_buffers fs/io_uring.c:9263 [inline]
io_ring_ctx_free fs/io_uring.c:9319 [inline]
io_ring_exit_work+0x74d/0xbe8 fs/io_uring.c:9495
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 48 85 ed test %rbp,%rbp
5: 48 0f 44 eb cmove %rbx,%rbp
9: e8 3f 3c e1 ff callq 0xffe13c4d
e: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
15: fc ff df
18: 48 8d bd 20 04 00 00 lea 0x420(%rbp),%rdi
1f: 48 89 fa mov %rdi,%rdx
22: 48 c1 ea 03 shr $0x3,%rdx
26: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
* 2a: 0f 85 05 02 00 00 jne 0x235 <-- trapping instruction
30: 48 83 bd 20 04 00 00 cmpq $0x0,0x420(%rbp)
37: 00
38: 74 42 je 0x7c
3a: e8 0e 3c e1 ff callq 0xffe13c4d
3f: 4c rex.WR