rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (1 GPs behind) idle=889/1/0x4000000000000000 softirq=14357/14358 fqs=2
(t=10502 jiffies g=19137 q=16)
rcu: rcu_preempt kthread starved for 10495 jiffies! g19137 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:28648 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4900 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 7111 Comm: syz-executor.1 Not tainted 5.16.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:166 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:200
Code: 48 89 ef 5d e9 d1 c0 45 00 5d be 03 00 00 00 e9 b6 35 64 02 66 0f 1f 44 00 00 48 8b be b0 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 <65> 8b 05 f9 a7 8b 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b
RSP: 0018:ffffc90000007a28 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffc90000007b20 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff88807d3be080 RDI: 0000000000000003
RBP: ffffc90000007c80 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff819869cc R11: 0000000000000000 R12: 0000000000000000
R13: ffff88807e4df3e0 R14: 0000000000000000 R15: ffffc90000007b20
FS: 00007f285acc0700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d837000 CR3: 00000000267fb000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
perf_prepare_sample+0x81a/0x1e30 kernel/events/core.c:7421
__perf_event_output kernel/events/core.c:7487 [inline]
perf_event_output_forward+0xda/0x280 kernel/events/core.c:7507
__perf_event_overflow+0x13c/0x3d0 kernel/events/core.c:9207
perf_swevent_hrtimer+0x37c/0x3f0 kernel/events/core.c:10600
__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:queued_read_lock_slowpath+0x124/0x2a0 kernel/locking/qrwlock.c:48
Code: 00 8b 03 84 c0 74 36 48 b8 00 00 00 00 00 fc ff df 49 89 de 48 89 dd 49 c1 ee 03 83 e5 07 49 01 c6 83 c5 03 f3 90 41 0f b6 06 <40> 38 c5 7c 08 84 c0 0f 85 13 01 00 00 8b 03 84 c0 75 e7 48 c7 c0
RSP: 0018:ffffc900058e71d0 EFLAGS: 00000286
RAX: 0000000000000000 RBX: ffff88814aea00c0 RCX: ffffffff815c5bba
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88814aea00c0
RBP: 0000000000000003 R08: 0000000000000001 R09: ffff88814aea00c3
R10: ffffed10295d4018 R11: 0000000000000001 R12: 1ffff92000b1ce3b
R13: ffff88814aea00c4 R14: ffffed10295d4018 R15: dffffc0000000000
start_this_handle+0x24b/0x1380 fs/jbd2/transaction.c:388
jbd2__journal_start+0x399/0x930 fs/jbd2/transaction.c:525
__ext4_journal_start_sb+0x227/0x4a0 fs/ext4/ext4_jbd2.c:105
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_dirty_inode+0x9d/0x110 fs/ext4/inode.c:5916
__mark_inode_dirty+0x45b/0xfe0 fs/fs-writeback.c:2399
mark_inode_dirty include/linux/fs.h:2451 [inline]
generic_write_end+0x31b/0x500 fs/buffer.c:2202
ext4_da_write_end+0x1c2/0x990 fs/ext4/inode.c:3059
generic_perform_write+0x2c6/0x510 mm/filemap.c:3765
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: 0033:0x7f285c34ae99
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:00007f285acc0168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f285c45df60 RCX: 00007f285c34ae99
RDX: 0000000000000000 RSI: 000000000000000b RDI: 0000000000000005
RBP: 00007f285c3a4ff1 R08: 0000000000000000 R09: 0000000000000000
R10: 00008400fffffffb R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe03073ebf R14: 00007f285acc0300 R15: 0000000000022000
NMI backtrace for cpu 1
CPU: 1 PID: 7110 Comm: syz-executor.3 Not tainted 5.16.0-rc7-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+0x5c/0x759 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:lock_release+0x3fc/0x720 kernel/locking/lockdep.c:5645
Code: 58 f6 c4 02 0f 85 78 01 00 00 48 f7 04 24 00 02 00 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df 48 01 c5 48 c7 45 00 00 00 00 00 45 08 00 00 00 00 48 8b 84 24 88 00 00 00 65 48 2b 04 25 28 00
RSP: 0018:ffffc9000599f230 EFLAGS: 00000286
RAX: dffffc0000000000 RBX: f2b5bd0bfa966b20 RCX: ffffc9000599f280
RDX: 1ffff11004eb9d82 RSI: 0000000000000001 RDI: 0000000000000000
RBP: fffff52000b33e48 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000003
R13: 0000000000000004 R14: ffff8880275cec18 R15: ffff8880275ce1c0
__raw_write_unlock include/linux/rwlock_api_smp.h:216 [inline]
_raw_write_unlock+0x12/0x40 kernel/locking/spinlock.c:332
jbd2_log_start_commit+0x35/0x40 fs/jbd2/journal.c:527
jbd2_journal_stop+0x502/0xf20 fs/jbd2/transaction.c:1913
__ext4_journal_stop+0xde/0x1f0 fs/ext4/ext4_jbd2.c:127
ext4_dirty_inode+0xe8/0x110 fs/ext4/inode.c:5920
__mark_inode_dirty+0x45b/0xfe0 fs/fs-writeback.c:2399
mark_inode_dirty include/linux/fs.h:2451 [inline]
generic_write_end+0x31b/0x500 fs/buffer.c:2202
ext4_da_write_end+0x1c2/0x990 fs/ext4/inode.c:3059
generic_perform_write+0x2c6/0x510 mm/filemap.c:3765
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: 0033:0x7f650a88be99
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:00007f6509201168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f650a99ef60 RCX: 00007f650a88be99
RDX: 0000000000000000 RSI: 000000000000000b RDI: 0000000000000005
RBP: 00007f650a8e5ff1 R08: 0000000000000000 R09: 0000000000000000
R10: 00008400fffffffb R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffed45d593f R14: 00007f6509201300 R15: 0000000000022000
sched: RT throttling activated
----------------
Code disassembly (best guess):
0: 48 89 ef mov %rbp,%rdi
3: 5d pop %rbp
4: e9 d1 c0 45 00 jmpq 0x45c0da
9: 5d pop %rbp
a: be 03 00 00 00 mov $0x3,%esi
f: e9 b6 35 64 02 jmpq 0x26435ca
14: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
1a: 48 8b be b0 01 00 00 mov 0x1b0(%rsi),%rdi
21: e8 b4 ff ff ff callq 0xffffffda
26: 31 c0 xor %eax,%eax
28: c3 retq
29: 90 nop
* 2a: 65 8b 05 f9 a7 8b 7e mov %gs:0x7e8ba7f9(%rip),%eax # 0x7e8ba82a <-- trapping instruction
31: 89 c1 mov %eax,%ecx
33: 48 8b 34 24 mov (%rsp),%rsi
37: 81 e1 00 01 00 00 and $0x100,%ecx
3d: 65 gs
3e: 48 rex.W
3f: 8b .byte 0x8b