rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
(detected by 1, t=10502 jiffies, g=5077, q=32)
rcu: All QSes seen, last rcu_preempt kthread activity 3349 (4295002251-4294998902), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 3350 jiffies! g5077 f0x2 RCU_GP_CLEANUP(7) ->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:4972 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6253
preempt_schedule_common kernel/sched/core.c:6419 [inline]
preempt_schedule+0x14d/0x190 kernel/sched/core.c:6444
preempt_schedule_thunk+0x16/0x18
__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
_raw_spin_unlock_irq+0x3c/0x40 kernel/locking/spinlock.c:202
rcu_gp_cleanup+0x4f4/0xbc0 kernel/rcu/tree.c:2059
rcu_gp_kthread+0xb3/0x350 kernel/rcu/tree.c:2132
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: 3645 Comm: syz-executor587 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_other_cpu_stall kernel/rcu/tree_stall.h:586 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:729 [inline]
rcu_pending kernel/rcu/tree.c:3878 [inline]
rcu_sched_clock_irq+0x23d5/0x2bc0 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:unwind_next_frame+0xaa1/0x1fc0
Code: 42 8a 04 30 84 c0 48 8b 5c 24 78 48 8b 6c 24 20 0f 85 e1 11 00 00 c6 03 00 ba 10 00 00 00 48 8b 7c 24 28 31 f6 e8 af b0 95 00 66 04 00 00 48 89 5c 24 60 49 8d 7d 08 48 89 f8 48 c1 e8 03 42
RSP: 0018:ffffc900027de900 EFLAGS: 00000202
RAX: ffffc900027dea10 RBX: ffffc900027de9f5 RCX: 0000000000000000
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffc900027dea20
RBP: ffffffff8e814392 R08: dffffc0000000000 R09: ffffc900027dea10
R10: fffff520004fbd44 R11: 0000000000000000 R12: 1ffffffff1d02872
R13: ffffc900027de9c0 R14: dffffc0000000000 R15: ffffffff8e814396
arch_stack_walk+0x112/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x11b/0x1e0 kernel/stacktrace.c:122
save_stack+0xff/0x200 mm/page_owner.c:119
__set_page_owner+0x42/0x2f0 mm/page_owner.c:181
prep_new_page mm/page_alloc.c:2418 [inline]
get_page_from_freelist+0x729/0x9e0 mm/page_alloc.c:4149
__alloc_pages+0x255/0x580 mm/page_alloc.c:5369
alloc_slab_page mm/slub.c:1793 [inline]
allocate_slab+0xcc/0x4d0 mm/slub.c:1930
new_slab mm/slub.c:1993 [inline]
___slab_alloc+0x41e/0xc40 mm/slub.c:3022
__slab_alloc mm/slub.c:3109 [inline]
slab_alloc_node mm/slub.c:3200 [inline]
slab_alloc mm/slub.c:3242 [inline]
kmem_cache_alloc+0x276/0x310 mm/slub.c:3247
kmem_cache_zalloc include/linux/slab.h:714 [inline]
alloc_buffer_head+0x20/0xf0 fs/buffer.c:3309
alloc_page_buffers+0x309/0x5a0 fs/buffer.c:832
create_empty_buffers+0x36/0x640 fs/buffer.c:1560
ext4_block_write_begin+0x300/0x1840 fs/ext4/inode.c:1060
ext4_da_write_begin+0x58c/0x9b0 fs/ext4/inode.c:2966
generic_perform_write+0x2dd/0x600 mm/filemap.c:3754
ext4_buffered_write_iter+0x391/0x520 fs/ext4/file.c:269
ext4_file_write_iter+0x8f7/0x1bd0
do_iter_readv_writev+0x54f/0x740
do_iter_write+0x21e/0x7b0 fs/read_write.c:851
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: 0033:0x7f364932b0a9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd55ee2f98 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007f364932b0a9
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: 00008400fffffffa R11: 0000000000000246 R12: 00007f36492ee880
R13: 0000000000000000 R14: 00007ffd55ee2fc0 R15: 00007ffd55ee2fb0
sched: RT throttling activated
----------------
Code disassembly (best guess):
0: 42 8a 04 30 mov (%rax,%r14,1),%al
4: 84 c0 test %al,%al
6: 48 8b 5c 24 78 mov 0x78(%rsp),%rbx
b: 48 8b 6c 24 20 mov 0x20(%rsp),%rbp
10: 0f 85 e1 11 00 00 jne 0x11f7
16: c6 03 00 movb $0x0,(%rbx)
19: ba 10 00 00 00 mov $0x10,%edx
1e: 48 8b 7c 24 28 mov 0x28(%rsp),%rdi
23: 31 f6 xor %esi,%esi
25: e8 af b0 95 00 callq 0x95b0d9
* 2a: e9 66 04 00 00 jmpq 0x495 <-- trapping instruction
2f: 48 89 5c 24 60 mov %rbx,0x60(%rsp)
34: 49 8d 7d 08 lea 0x8(%r13),%rdi
38: 48 89 f8 mov %rdi,%rax
3b: 48 c1 e8 03 shr $0x3,%rax
3f: 42 rex.X