rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (10499 ticks this GP) idle=ebf/1/0x4000000000000000 softirq=22024/22024 fqs=2
(t=10500 jiffies g=30517 q=17)
rcu: rcu_preempt kthread starved for 10496 jiffies! g30517 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:26576 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0x971/0x10e0 kernel/sched/core.c:6296
schedule+0x12b/0x1f0 kernel/sched/core.c:6369
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x1fd/0x770 kernel/rcu/tree.c:1963
rcu_gp_kthread+0xa5/0x350 kernel/rcu/tree.c:2136
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
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: 7559 Comm: syz-executor.5 Not tainted 5.16.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:check_preemption_disabled+0x7f/0x1c0 lib/smp_processor_id.c:19
Code: 25 28 00 00 00 48 3b 44 24 08 0f 85 52 01 00 00 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 c7 04 24 00 00 00 00 9c <8f> 04 24 4c 8b 24 24 bd 00 02 00 00 be 00 02 00 00 4c 21 e6 31 ff
RSP: 0018:ffffc90000dc0ef0 EFLAGS: 00000046
RAX: 2d38e760671fd900 RBX: 0000000000000001 RCX: 0000000000010000
RDX: 1ffffffff1eeda08 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8f76d040 R09: ffffffff8f76d048
R10: ffffffff8f76d05c R11: ffffffff8f76d050 R12: ffffc90000dc0f80
R13: 0000000000000000 R14: ffffffff8a6d5040 R15: ffffffff8ad5ee60
FS: 00007f91f91b0700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020e00010 CR3: 000000005ff4c000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
invoke_softirq+0x10/0xd0 kernel/softirq.c:422
__irq_exit_rcu+0xec/0x170 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:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:memset_erms+0xb/0x10
Code: 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 f3 aa <4c> 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01 01 01
RSP: 0018:ffffc90004617cb8 EFLAGS: 00000202
RAX: ffff88801a166000 RBX: ffffc90004617d80 RCX: 0000000000000000
RDX: 0000000000000018 RSI: 0000000000000000 RDI: ffffc90004617d80
RBP: ffffc90004617e50 R08: dffffc0000000000 R09: ffffc90004617d68
R10: fffff520008c2fb0 R11: 0000000000000000 R12: ffffc90004617d60
R13: 0000000000000000 R14: 1ffff920008c2fa4 R15: 0000000000000000
init_sync_kiocb include/linux/fs.h:2251 [inline]
new_sync_write fs/read_write.c:499 [inline]
vfs_write+0x9a2/0xe90 fs/read_write.c:590
ksys_pwrite64 fs/read_write.c:697 [inline]
__do_sys_pwrite64 fs/read_write.c:707 [inline]
__se_sys_pwrite64 fs/read_write.c:704 [inline]
__x64_sys_pwrite64+0x1b2/0x240 fs/read_write.c:704
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f91fa7edfb7
Code: 08 89 3c 24 48 89 4c 24 18 e8 e5 f8 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 48 8b 74 24 08 8b 3c 24 b8 12 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 04 24 e8 15 f9 ff ff 48 8b
RSP: 002b:00007f91f91aff00 EFLAGS: 00000293 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007f91fa8849c8 RCX: 00007f91fa7edfb7
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0aaaaaaaaaaaabe2 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000005
R13: 0000000000000005 R14: 0000000020edf2c0 R15: 000000000009ea08
NMI backtrace for cpu 0
CPU: 0 PID: 7551 Comm: syz-executor.2 Not tainted 5.16.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x22d/0x390 kernel/rcu/tree_stall.h:343
print_cpu_stall kernel/rcu/tree_stall.h:604 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:688 [inline]
rcu_pending kernel/rcu/tree.c:3919 [inline]
rcu_sched_clock_irq+0x1e33/0x2bc0 kernel/rcu/tree.c:2617
update_process_times+0x197/0x200 kernel/time/timer.c:1785
tick_sched_handle kernel/time/tick-sched.c:226 [inline]
tick_sched_timer+0x27d/0x420 kernel/time/tick-sched.c:1428
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x4cb/0xa60 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:lock_release+0x1/0x810 kernel/locking/lockdep.c:5647
Code: e1 07 80 c1 03 38 c1 0f 8c 50 f3 ff ff 48 c7 c7 68 98 00 8e e8 30 0c 6a 00 e9 3f f3 ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 55 <48> 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec 00 01 00
RSP: 0018:ffffc9000441fc88 EFLAGS: 00000246
RAX: 1ffff110033cd1b8 RBX: ffff888019e68dc0 RCX: 0000000000040000
RDX: ffff88801d3a9d00 RSI: ffffffff81db3410 RDI: ffff8880115cc460
RBP: 0000000000008000 R08: ffffffff81db2a5d R09: ffffed10033cd1d0
R10: ffffed10033cd1d0 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff11005189f80 R14: ffff8880115cc000 R15: dffffc0000000000
percpu_up_read include/linux/percpu-rwsem.h:99 [inline]
__sb_end_write include/linux/fs.h:1729 [inline]
file_end_write+0x97/0x230 include/linux/fs.h:2963
vfs_write+0x7e0/0xe90 fs/read_write.c:598
ksys_pwrite64 fs/read_write.c:697 [inline]
__do_sys_pwrite64 fs/read_write.c:707 [inline]
__se_sys_pwrite64 fs/read_write.c:704 [inline]
__x64_sys_pwrite64+0x1b2/0x240 fs/read_write.c:704
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fa4a8848fb7
Code: 08 89 3c 24 48 89 4c 24 18 e8 e5 f8 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 48 8b 74 24 08 8b 3c 24 b8 12 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 04 24 e8 15 f9 ff ff 48 8b
RSP: 002b:00007fa4a720af00 EFLAGS: 00000293 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007fa4a88df9c8 RCX: 00007fa4a8848fb7
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0aaaaaaaaaaaabe2 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000005
R13: 0000000000000005 R14: 0000000020b5e6e0 R15: 0000000000079434
sched: RT throttling activated
----------------
Code disassembly (best guess):
0: 25 28 00 00 00 and $0x28,%eax
5: 48 3b 44 24 08 cmp 0x8(%rsp),%rax
a: 0f 85 52 01 00 00 jne 0x162
10: 89 d8 mov %ebx,%eax
12: 48 83 c4 10 add $0x10,%rsp
16: 5b pop %rbx
17: 41 5c pop %r12
19: 41 5d pop %r13
1b: 41 5e pop %r14
1d: 41 5f pop %r15
1f: 5d pop %rbp
20: c3 retq
21: 48 c7 04 24 00 00 00 movq $0x0,(%rsp)
28: 00
29: 9c pushfq
* 2a: 8f 04 24 popq (%rsp) <-- trapping instruction
2d: 4c 8b 24 24 mov (%rsp),%r12
31: bd 00 02 00 00 mov $0x200,%ebp
36: be 00 02 00 00 mov $0x200,%esi
3b: 4c 21 e6 and %r12,%rsi
3e: 31 ff xor %edi,%edi