rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (10501 ticks this GP) idle=9fb/1/0x4000000000000000 softirq=13964/13964 fqs=0
(t=10502 jiffies g=18617 q=494)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10502 jiffies! g18617 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=6597
rcu: rcu_preempt kthread starved for 10505 jiffies! g18617 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:26576 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6253
schedule+0x12b/0x1f0 kernel/sched/core.c:6326
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x1fd/0x770 kernel/rcu/tree.c:1955
rcu_gp_kthread+0xa5/0x350 kernel/rcu/tree.c:2128
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 1
CPU: 1 PID: 5690 Comm: syz-executor.1 Not tainted 5.16.0-rc6-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_check_gp_kthread_starvation+0x1ff/0x270 kernel/rcu/tree_stall.h:481
print_cpu_stall kernel/rcu/tree_stall.h:625 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
rcu_pending kernel/rcu/tree.c:3878 [inline]
rcu_sched_clock_irq+0x1e2e/0x2bc0 kernel/rcu/tree.c:2597
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:vfs_iter_write+0x0/0xa0 fs/read_write.c:889
Code: 89 e7 e8 c3 97 f4 ff e9 11 fe ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 40 fe ff ff 4c 89 ef e8 b5 97 f4 ff e9 33 fe ff ff <55> 41 57 41 56 41 55 41 54 53 41 89 ce 49 89 d7 49 89 f4 48 89 fb
RSP: 0018:ffffc90004adf818 EFLAGS: 00000246
RAX: 1fc590c5e9241d00 RBX: ffffc90004adf938 RCX: 0000000000000000
RDX: ffffc90004adf938 RSI: ffffc90004adf980 RDI: ffff88807c76f400
RBP: ffffc90004adfa30 R08: dffffc0000000000 R09: fffff5200095bf31
R10: fffff5200095bf31 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88807e44a578 R14: ffffc90004adf980 R15: dffffc0000000000
iter_file_splice_write+0x7eb/0xfa0 fs/splice.c:689
do_splice_from fs/splice.c:767 [inline]
direct_splice_actor+0xe6/0x1c0 fs/splice.c:936
splice_direct_to_actor+0x529/0xd00 fs/splice.c:891
do_splice_direct+0x291/0x3e0 fs/splice.c:979
do_sendfile+0x6fe/0x1040 fs/read_write.c:1245
__do_sys_sendfile64 fs/read_write.c:1310 [inline]
__se_sys_sendfile64+0x171/0x1d0 fs/read_write.c:1296
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: 0033:0x7f6ce24dce99
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:00007f6ce0e52168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f6ce25eff60 RCX: 00007f6ce24dce99
RDX: 0000000000000000 RSI: 000000000000000b RDI: 0000000000000005
RBP: 00007f6ce2536ff1 R08: 0000000000000000 R09: 0000000000000000
R10: 00008400fffffffa R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff1f03dbef R14: 00007f6ce0e52300 R15: 0000000000022000
NMI backtrace for cpu 1
CPU: 1 PID: 5690 Comm: syz-executor.1 Not tainted 5.16.0-rc6-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:627 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
rcu_pending kernel/rcu/tree.c:3878 [inline]
rcu_sched_clock_irq+0x1e33/0x2bc0 kernel/rcu/tree.c:2597
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:vfs_iter_write+0x0/0xa0 fs/read_write.c:889
Code: 89 e7 e8 c3 97 f4 ff e9 11 fe ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 40 fe ff ff 4c 89 ef e8 b5 97 f4 ff e9 33 fe ff ff <55> 41 57 41 56 41 55 41 54 53 41 89 ce 49 89 d7 49 89 f4 48 89 fb
RSP: 0018:ffffc90004adf818 EFLAGS: 00000246
RAX: 1fc590c5e9241d00 RBX: ffffc90004adf938 RCX: 0000000000000000
RDX: ffffc90004adf938 RSI: ffffc90004adf980 RDI: ffff88807c76f400
RBP: ffffc90004adfa30 R08: dffffc0000000000 R09: fffff5200095bf31
R10: fffff5200095bf31 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88807e44a578 R14: ffffc90004adf980 R15: dffffc0000000000
iter_file_splice_write+0x7eb/0xfa0 fs/splice.c:689
do_splice_from fs/splice.c:767 [inline]
direct_splice_actor+0xe6/0x1c0 fs/splice.c:936
splice_direct_to_actor+0x529/0xd00 fs/splice.c:891
do_splice_direct+0x291/0x3e0 fs/splice.c:979
do_sendfile+0x6fe/0x1040 fs/read_write.c:1245
__do_sys_sendfile64 fs/read_write.c:1310 [inline]
__se_sys_sendfile64+0x171/0x1d0 fs/read_write.c:1296
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: 0033:0x7f6ce24dce99
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:00007f6ce0e52168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f6ce25eff60 RCX: 00007f6ce24dce99
RDX: 0000000000000000 RSI: 000000000000000b RDI: 0000000000000005
RBP: 00007f6ce2536ff1 R08: 0000000000000000 R09: 0000000000000000
R10: 00008400fffffffa R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff1f03dbef R14: 00007f6ce0e52300 R15: 0000000000022000
sched: RT throttling activated
----------------
Code disassembly (best guess):
0: 89 e7 mov %esp,%edi
2: e8 c3 97 f4 ff callq 0xfff497ca
7: e9 11 fe ff ff jmpq 0xfffffe1d
c: 44 89 e9 mov %r13d,%ecx
f: 80 e1 07 and $0x7,%cl
12: 80 c1 03 add $0x3,%cl
15: 38 c1 cmp %al,%cl
17: 0f 8c 40 fe ff ff jl 0xfffffe5d
1d: 4c 89 ef mov %r13,%rdi
20: e8 b5 97 f4 ff callq 0xfff497da
25: e9 33 fe ff ff jmpq 0xfffffe5d
* 2a: 55 push %rbp <-- trapping instruction
2b: 41 57 push %r15
2d: 41 56 push %r14
2f: 41 55 push %r13
31: 41 54 push %r12
33: 53 push %rbx
34: 41 89 ce mov %ecx,%r14d
37: 49 89 d7 mov %rdx,%r15
3a: 49 89 f4 mov %rsi,%r12
3d: 48 89 fb mov %rdi,%rbx