rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
(detected by 1, t=10502 jiffies, g=30201, q=72)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294981999-4294971497), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g30201 f0x2 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:28720 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4d90 kernel/sched/core.c:6296
schedule+0xd2/0x260 kernel/sched/core.c:6369
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1971
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2144
kthread+0x405/0x4f0 kernel/kthread.c:345
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: 7755 Comm: syz-executor.1 Not tainted 5.16.0-rc5-next-20211220-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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 a6 25 71 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 69 59 8a 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:ffffc90000007be8 EFLAGS: 00000046
RAX: 0000000080010001 RBX: 000000000001574e RCX: 000000000001574e
RDX: 0000000000000000 RSI: ffff88801a9b57c0 RDI: 0000000000000003
RBP: 000000000001574e R08: 000000000001574e R09: 0000000000000000
R10: ffffffff81680f6d R11: 0000000000000000 R12: ffffffffffffffff
R13: dffffc0000000000 R14: 000000000001574e R15: 000000e873f64ff0
FS: 00007f9de33fc700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ea39000 CR3: 000000001df42000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
clocksource_delta kernel/time/timekeeping_internal.h:21 [inline]
timekeeping_get_delta kernel/time/timekeeping.c:259 [inline]
timekeeping_get_ns kernel/time/timekeeping.c:386 [inline]
ktime_get+0x23b/0x470 kernel/time/timekeeping.c:829
hrtimer_forward_now include/linux/hrtimer.h:506 [inline]
perf_swevent_hrtimer+0x246/0x3f0 kernel/events/core.c:10626
__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:deref_stack_reg+0xc/0x150 arch/x86/kernel/unwind_orc.c:351
Code: 8a 2c 8f 00 48 8b 14 24 e9 48 ff ff ff 48 89 0c 24 e8 78 2c 8f 00 48 8b 0c 24 eb 9d 66 90 48 b8 00 00 00 00 00 fc ff df 41 55 <41> 54 49 89 fc 55 48 89 f5 53 48 89 d3 48 89 fa 48 c1 ea 03 48 83
RSP: 0018:ffffc90005116df0 EFLAGS: 00000283
RAX: dffffc0000000000 RBX: 1ffff92000a22dc8 RCX: 0000000000000000
RDX: ffffc90005116f18 RSI: ffffc900051174d0 RDI: ffffc90005116ed8
RBP: 0000000000000001 R08: ffffffff8e1d0b1c R09: 0000000000000001
R10: fffff52000a22de6 R11: 0000000000088077 R12: ffffc90005117500
R13: ffffc90005116f0d R14: ffffc90005116ed8 R15: ffffc90005116f0c
unwind_next_frame+0x13f9/0x1ce0 arch/x86/kernel/unwind_orc.c:600
arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
kasan_set_track+0x21/0x30 mm/kasan/common.c:45
kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
____kasan_slab_free mm/kasan/common.c:366 [inline]
____kasan_slab_free+0x166/0x1a0 mm/kasan/common.c:328
kasan_slab_free include/linux/kasan.h:236 [inline]
slab_free_hook mm/slub.c:1728 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1754
slab_free mm/slub.c:3510 [inline]
kmem_cache_free+0xdd/0x580 mm/slub.c:3527
jbd2_free_handle include/linux/jbd2.h:1608 [inline]
jbd2_journal_stop+0x656/0xf10 fs/jbd2/transaction.c:1937
__ext4_journal_stop+0xde/0x1f0 fs/ext4/ext4_jbd2.c:127
ext4_dirty_inode+0xe8/0x110 fs/ext4/inode.c:5927
__mark_inode_dirty+0x45b/0xfe0 fs/fs-writeback.c:2409
mark_inode_dirty include/linux/fs.h:2372 [inline]
generic_write_end+0x3ea/0x6e0 fs/buffer.c:2239
ext4_da_write_end+0x1c2/0x990 fs/ext4/inode.c:3060
generic_perform_write+0x2c6/0x510 mm/filemap.c:3820
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:2079 [inline]
do_iter_readv_writev+0x47a/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+0x723/0xc70 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: 0033:0x7f9de4a86e99
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:00007f9de33fc168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f9de4b99f60 RCX: 00007f9de4a86e99
RDX: 0000000000000000 RSI: 0000000000000013 RDI: 0000000000000006
RBP: 00007f9de4ae0ff1 R08: 0000000000000000 R09: 0000000000000000
R10: 00008400fffffffb R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe3347412f R14: 00007f9de33fc300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: 4a 00 5d be rex.WX add %bl,-0x42(%rbp)
4: 03 00 add (%rax),%eax
6: 00 00 add %al,(%rax)
8: e9 a6 25 71 02 jmpq 0x27125b3
d: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
13: 48 8b be b0 01 00 00 mov 0x1b0(%rsi),%rdi
1a: e8 b4 ff ff ff callq 0xffffffd3
1f: 31 c0 xor %eax,%eax
21: c3 retq
22: 90 nop
23: 65 8b 05 69 59 8a 7e mov %gs:0x7e8a5969(%rip),%eax # 0x7e8a5993
* 2a: 89 c1 mov %eax,%ecx <-- trapping instruction
2c: 48 8b 34 24 mov (%rsp),%rsi
30: 81 e1 00 01 00 00 and $0x100,%ecx
36: 65 48 8b 14 25 00 70 mov %gs:0x27000,%rdx
3d: 02 00
3f: a9 .byte 0xa9