rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (1 GPs behind) idle=753/1/0x4000000000000000 softirq=11591/11592 fqs=0
(t=10501 jiffies g=13601 q=43)
rcu: rcu_preempt kthread starved for 10502 jiffies! g13601 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:28944 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
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: 4778 Comm: syz-executor.0 Not tainted 5.16.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:native_apic_mem_write+0x8/0x10 arch/x86/include/asm/apic.h:110
Code: c7 c0 78 16 8f e8 18 11 8a 00 eb b0 66 0f 1f 44 00 00 be 01 00 00 00 e9 e6 45 2d 00 cc cc cc cc cc cc 89 ff 89 b7 00 c0 5f ff 0f 1f 80 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 53 89 fb 48
RSP: 0018:ffffc90000fd8eb8 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffffffff8b55ba80 RCX: 0000000000000020
RDX: 1ffffffff16ab752 RSI: 0000000000000114 RDI: 0000000000000380
RBP: ffff8880b9d27300 R08: 000000000000003f R09: 0000000000000000
R10: ffffffff816968f7 R11: 0000000000000000 R12: 0000000000000114
R13: 0000000000000020 R14: 0000000000000000 R15: ffff8880b9d2a400
FS: 00007f76ad3c5700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d83a000 CR3: 0000000075db2000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
apic_write arch/x86/include/asm/apic.h:394 [inline]
lapic_next_event+0x4d/0x80 arch/x86/kernel/apic/apic.c:469
clockevents_program_event+0x254/0x370 kernel/time/clockevents.c:334
tick_program_event+0xac/0x140 kernel/time/tick-oneshot.c:44
hrtimer_interrupt+0x36e/0x790 kernel/time/hrtimer.c:1824
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:__sanitizer_cov_trace_pc+0x4c/0x60 kernel/kcov.c:205
Code: 0e 85 c9 74 35 8b 82 a4 15 00 00 85 c0 74 2b 8b 82 80 15 00 00 83 f8 02 75 20 48 8b 8a 88 15 00 00 8b 92 84 15 00 00 48 8b 01 <48> 83 c0 01 48 39 c2 76 07 48 89 34 c1 48 89 01 c3 0f 1f 00 41 55
RSP: 0018:ffffc90002e67330 EFLAGS: 00000246
RAX: 000000000003ffff RBX: 0000000000000000 RCX: ffffc90002eda000
RDX: 0000000000040000 RSI: ffffffff81a58e9b RDI: ffffea00015db4c0
RBP: ffffea00015db4c0 R08: 0000000000000000 R09: ffffea00015db4c7
R10: ffffffff81a58f53 R11: 0000000000000000 R12: ffffea00015db4c0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
folio_flags.constprop.0+0xb/0x70 include/linux/page-flags.h:261
folio_test_swapbacked include/linux/page-flags.h:446 [inline]
folio_test_swapcache include/linux/page-flags.h:487 [inline]
folio_mapping+0x69/0x220 mm/util.c:719
mark_buffer_dirty+0x482/0x650 fs/buffer.c:1106
ext4_block_write_begin+0xb3e/0x1140 fs/ext4/inode.c:1085
ext4_da_write_begin+0x3eb/0xad0 fs/ext4/inode.c:2966
generic_perform_write+0x205/0x510 mm/filemap.c:3754
ext4_buffered_write_iter+0x1ac/0x3b0 fs/ext4/file.c:269
ext4_file_write_iter+0x423/0x14e0 fs/ext4/file.c:681
call_write_iter include/linux/fs.h:2162 [inline]
do_iter_readv_writev+0x472/0x750 fs/read_write.c:725
do_iter_write+0x188/0x710 fs/read_write.c:851
vfs_iter_write+0x70/0xa0 fs/read_write.c:892
iter_file_splice_write+0x6fa/0xc10 fs/splice.c:689
do_splice_from fs/splice.c:767 [inline]
direct_splice_actor+0x110/0x180 fs/splice.c:936
splice_direct_to_actor+0x34b/0x8c0 fs/splice.c:891
do_splice_direct+0x1b3/0x280 fs/splice.c:979
do_sendfile+0xaf2/0x1250 fs/read_write.c:1245
__do_sys_sendfile64 fs/read_write.c:1310 [inline]
__se_sys_sendfile64 fs/read_write.c:1296 [inline]
__x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1296
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: 0033:0x7f76aea4fe99
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:00007f76ad3c5168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f76aeb62f60 RCX: 00007f76aea4fe99
RDX: 0000000000000000 RSI: 000000000000000c RDI: 0000000000000005
RBP: 00007f76aeaa9ff1 R08: 0000000000000000 R09: 0000000000000000
R10: 00008400fffffffa R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd0aab2caf R14: 00007f76ad3c5300 R15: 0000000000022000
NMI backtrace for cpu 0
CPU: 0 PID: 4782 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+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 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:1428
__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+0x83a/0x1ce0 arch/x86/kernel/unwind_orc.c:466
Code: 12 00 00 41 80 7e 34 00 0f 85 00 fc ff ff 80 3d 96 a4 48 0c 00 0f 85 f3 fb ff ff e9 aa a0 cd 07 48 b8 00 00 00 00 00 fc ff df <48> 8b 54 24 08 48 c1 ea 03 80 3c 02 00 0f 85 2a 0f 00 00 4c 89 c0
RSP: 0018:ffffc90002e96e08 EFLAGS: 00000297
RAX: dffffc0000000000 RBX: 1ffff920005d2dc9 RCX: ffffffff8e153c75
RDX: 0000000000000005 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffffffff8e153c70 R09: 0000000000000001
R10: fffff520005d2de7 R11: 000000000008808a R12: ffffc90002e96f28
R13: ffffc90002e96f15 R14: ffffc90002e96ee0 R15: ffffffff8e153c74
arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122
save_stack+0x151/0x1e0 mm/page_owner.c:119
__set_page_owner+0x45/0x2d0 mm/page_owner.c:181
prep_new_page mm/page_alloc.c:2418 [inline]
get_page_from_freelist+0xa72/0x2f50 mm/page_alloc.c:4149
__alloc_pages+0x1b2/0x500 mm/page_alloc.c:5369
alloc_pages+0x1a7/0x300 mm/mempolicy.c:2190
folio_alloc+0x1c/0x70 mm/mempolicy.c:2200
filemap_alloc_folio+0x8e/0xb0 mm/filemap.c:1036
__page_cache_alloc include/linux/pagemap.h:373 [inline]
page_cache_ra_unbounded+0x36a/0x940 mm/readahead.c:215
do_page_cache_ra mm/readahead.c:268 [inline]
ondemand_readahead+0x594/0x1090 mm/readahead.c:551
page_cache_async_ra mm/readahead.c:608 [inline]
page_cache_async_ra+0x2e1/0x3f0 mm/readahead.c:583
page_cache_async_readahead include/linux/pagemap.h:1051 [inline]
filemap_readahead mm/filemap.c:2531 [inline]
filemap_get_pages+0x6f1/0x1be0 mm/filemap.c:2572
filemap_read+0x315/0xeb0 mm/filemap.c:2642
generic_file_read_iter+0x3b6/0x5a0 mm/filemap.c:2792
ext4_file_read_iter+0x1d4/0x5d0 fs/ext4/file.c:130
call_read_iter include/linux/fs.h:2156 [inline]
generic_file_splice_read+0x453/0x6d0 fs/splice.c:311
do_splice_to+0x1bf/0x250 fs/splice.c:796
splice_direct_to_actor+0x2c2/0x8c0 fs/splice.c:870
do_splice_direct+0x1b3/0x280 fs/splice.c:979
do_sendfile+0xaf2/0x1250 fs/read_write.c:1245
__do_sys_sendfile64 fs/read_write.c:1310 [inline]
__se_sys_sendfile64 fs/read_write.c:1296 [inline]
__x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1296
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: 0033:0x7f47a7e03e99
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:00007f47a6779168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f47a7f16f60 RCX: 00007f47a7e03e99
RDX: 0000000000000000 RSI: 000000000000000c RDI: 0000000000000005
RBP: 00007f47a7e5dff1 R08: 0000000000000000 R09: 0000000000000000
R10: 00008400fffffffa R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd48109c9f R14: 00007f47a6779300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: c7 c0 78 16 8f e8 mov $0xe88f1678,%eax
6: 18 11 sbb %dl,(%rcx)
8: 8a 00 mov (%rax),%al
a: eb b0 jmp 0xffffffbc
c: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
12: be 01 00 00 00 mov $0x1,%esi
17: e9 e6 45 2d 00 jmpq 0x2d4602
1c: cc int3
1d: cc int3
1e: cc int3
1f: cc int3
20: cc int3
21: cc int3
22: 89 ff mov %edi,%edi
24: 89 b7 00 c0 5f ff mov %esi,-0xa04000(%rdi)
* 2a: c3 retq <-- trapping instruction
2b: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
32: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
39: fc ff df
3c: 53 push %rbx
3d: 89 fb mov %edi,%ebx
3f: 48 rex.W