rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (1 ticks this GP) idle=8c5/1/0x4000000000000000 softirq=78433/78433 fqs=0
(t=18505 jiffies g=92497 q=113)
rcu: rcu_preempt kthread timer wakeup didn't happen for 18504 jiffies! g92497 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=32717
rcu: rcu_preempt kthread starved for 18505 jiffies! g92497 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:28592 pid: 16 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5073 [inline]
__schedule+0xa9a/0x4cc0 kernel/sched/core.c:6388
schedule+0xd2/0x1f0 kernel/sched/core.c:6460
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1884
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1971
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2144
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
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: 28236 Comm: syz-executor.3 Not tainted 5.18.0-rc5-syzkaller-00115-gfe27d189e3f4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:queued_write_lock_slowpath+0x137/0x2b0 kernel/locking/qrwlock.c:78
Code: 00 00 00 00 fc ff df 49 01 c7 41 83 c6 03 41 0f b6 07 41 38 c6 7c 08 84 c0 0f 85 3c 01 00 00 8b 03 3d 00 01 00 00 74 19 f3 90 <41> 0f b6 07 41 38 c6 7c ec 84 c0 74 e8 48 89 df e8 b4 99 66 00 eb
RSP: 0018:ffffc9000d997cd8 EFLAGS: 00000006
RAX: 0000000000000300 RBX: ffffffff8ba0a080 RCX: ffffffff815e35ff
RDX: fffffbfff1741411 RSI: 0000000000000004 RDI: ffffffff8ba0a080
RBP: 1ffff92001b32f9c R08: 0000000000000001 R09: ffffffff8ba0a083
R10: fffffbfff1741410 R11: 0000000000000001 R12: ffffffff8ba0a084
R13: 00000000000000ff R14: 0000000000000003 R15: fffffbfff1741410
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa0c6ddd718 CR3: 000000004ab1b000 CR4: 0000000000350ee0
Call Trace:
queued_write_lock include/asm-generic/qrwlock.h:97 [inline]
do_raw_write_lock+0x1ce/0x280 kernel/locking/spinlock_debug.c:210
exit_notify kernel/exit.c:676 [inline]
do_exit+0xb44/0x2a00 kernel/exit.c:815
do_group_exit+0xd2/0x2f0 kernel/exit.c:925
__do_sys_exit_group kernel/exit.c:936 [inline]
__se_sys_exit_group kernel/exit.c:934 [inline]
__x64_sys_exit_group+0x3a/0x50 kernel/exit.c:934
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: 0033:0x7fa0c7e890e9
Code: Unable to access opcode bytes at RIP 0x7fa0c7e890bf.
RSP: 002b:00007ffc4b70bd98 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007fa0c7e890e9
RDX: 00007fa0c7e3bd2b RSI: ffffffffffffffb8 RDI: 0000000000000000
RBP: 0000000000000000 R08: 00007fa0c7fa06a0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc4b70be80
NMI backtrace for cpu 0
CPU: 0 PID: 3607 Comm: syz-executor.2 Not tainted 5.18.0-rc5-syzkaller-00115-gfe27d189e3f4 #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+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x262/0x3f0 kernel/rcu/tree_stall.h:343
print_cpu_stall kernel/rcu/tree_stall.h:639 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:723 [inline]
rcu_pending kernel/rcu/tree.c:3923 [inline]
rcu_sched_clock_irq.cold+0xa1/0x8d6 kernel/rcu/tree.c:2625
update_process_times+0x16d/0x200 kernel/time/timer.c:1788
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:243
tick_sched_timer+0xee/0x120 kernel/time/tick-sched.c:1473
__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:645
RIP: 0010:check_kcov_mode kernel/kcov.c:166 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x7/0x60 kernel/kcov.c:200
Code: 4a 00 5d be 03 00 00 00 e9 c6 3e 7e 02 66 0f 1f 44 00 00 48 8b be a8 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 65 8b 05 89 30 89 7e <89> c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 00 70 02 00 a9
RSP: 0018:ffffc9000305fb58 EFLAGS: 00000206
RAX: 0000000080000001 RBX: 0000000000000000 RCX: 0000000040000000
RDX: 0000000000000000 RSI: ffff888024013b00 RDI: 0000000000000003
RBP: ffffc9000305fd1c R08: 0000000000000000 R09: ffffffff8ba0a083
R10: ffffffff81470e3c R11: 0000000000000001 R12: 0000000000000000
R13: 0000000040000005 R14: 0000000040000000 R15: ffff888054e81d80
wait_consider_task+0x32a/0x3c50 kernel/exit.c:1302
do_wait_thread kernel/exit.c:1401 [inline]
do_wait+0x6ca/0xce0 kernel/exit.c:1518
kernel_wait4+0x14c/0x260 kernel/exit.c:1681
__do_sys_wait4+0x13f/0x150 kernel/exit.c:1709
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: 0033:0x7f2799687587
Code: 89 7c 24 10 48 89 4c 24 18 e8 35 50 02 00 4c 8b 54 24 18 8b 54 24 14 41 89 c0 48 8b 74 24 08 8b 7c 24 10 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 89 44 24 10 e8 65 50 02 00 8b 44
RSP: 002b:00007ffe0d066430 EFLAGS: 00000293 ORIG_RAX: 000000000000003d
RAX: ffffffffffffffda RBX: 0000000000000dcb RCX: 00007f2799687587
RDX: 0000000040000001 RSI: 00007ffe0d0664bc RDI: 00000000ffffffff
RBP: 00007ffe0d0664bc R08: 0000000000000000 R09: 00007ffe0d0c9080
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 00000000000bd3cf R14: 0000000000000011 R15: 00007ffe0d066520
----------------
Code disassembly (best guess), 6 bytes skipped:
0: df 49 01 fisttps 0x1(%rcx)
3: c7 41 83 c6 03 41 0f movl $0xf4103c6,-0x7d(%rcx)
a: b6 07 mov $0x7,%dh
c: 41 38 c6 cmp %al,%r14b
f: 7c 08 jl 0x19
11: 84 c0 test %al,%al
13: 0f 85 3c 01 00 00 jne 0x155
19: 8b 03 mov (%rbx),%eax
1b: 3d 00 01 00 00 cmp $0x100,%eax
20: 74 19 je 0x3b
22: f3 90 pause
* 24: 41 0f b6 07 movzbl (%r15),%eax <-- trapping instruction
28: 41 38 c6 cmp %al,%r14b
2b: 7c ec jl 0x19
2d: 84 c0 test %al,%al
2f: 74 e8 je 0x19
31: 48 89 df mov %rbx,%rdi
34: e8 b4 99 66 00 callq 0x6699ed
39: eb .byte 0xeb