rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
(detected by 1, t=10502 jiffies, g=172193, q=1647)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4295065201-4295054699), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g172193 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:28696 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4953 [inline]
__schedule+0x940/0x26f0 kernel/sched/core.c:6234
schedule+0xd2/0x260 kernel/sched/core.c:6307
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1966
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2139
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: 6493 Comm: syz-executor.0 Not tainted 5.15.0-rc4-next-20211007-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:perf_trace_lock+0x2c/0x4d0 include/trace/events/lock.h:39
Code: 00 00 00 00 00 fc ff df 55 48 89 e5 41 57 48 8d 85 58 ff ff ff 41 56 49 89 f6 41 55 4c 8d 7d d8 48 c1 e8 03 49 89 fd 41 54 53 <48> 81 ec b0 00 00 00 48 89 85 50 ff ff ff 48 01 d0 48 c7 85 58 ff
RSP: 0018:ffffc90000007d80 EFLAGS: 00000806
RAX: 1ffff92000000fa0 RBX: ffff888070dba710 RCX: ffffffff815bba47
RDX: dffffc0000000000 RSI: ffffffff8bba0748 RDI: ffffffff8ba7e700
RBP: ffffc90000007da8 R08: 0000000000000000 R09: ffffffff8d8f9ad7
R10: fffffbfff1b1f35a R11: 0000000000000000 R12: ffffffff8bba0748
R13: ffffffff8ba7e700 R14: ffffffff8bba0748 R15: ffffc90000007d80
FS: 00007faacd83c700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e22b000 CR3: 00000000903ec000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 000000000000d0eb
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
trace_lock_release include/trace/events/lock.h:58 [inline]
lock_release+0x4a8/0x720 kernel/locking/lockdep.c:5648
seqcount_lockdep_reader_access include/linux/seqlock.h:104 [inline]
ktime_get+0x8d/0x470 kernel/time/timekeeping.c:827
clockevents_program_event+0x141/0x370 kernel/time/clockevents.c:326
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:on_stack arch/x86/include/asm/stacktrace.h:55 [inline]
RIP: 0010:unwind_next_frame+0x145b/0x1ca0 arch/x86/kernel/unwind_orc.c:617
Code: 0f bf 00 48 01 44 24 60 e9 1a f2 ff ff 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 ee 03 00 00 <49> 8d 7e 08 49 8b 6e 48 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48
RSP: 0018:ffffc9000305f470 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 1ffff9200060be96 RCX: 1ffff9200060beb3
RDX: 1ffff9200060beb2 RSI: ffffc9000305fe58 RDI: ffffc9000305fe58
RBP: 0000000000000001 R08: ffffffff8e16abec R09: 0000000000000001
R10: fffff5200060beb6 R11: 0000000000088089 R12: ffffc9000305fe88
R13: ffffc9000305f589 R14: ffffc9000305f548 R15: ffffc9000305f588
arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc mm/kasan/common.c:513 [inline]
____kasan_kmalloc mm/kasan/common.c:472 [inline]
__kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:522
kmalloc include/linux/slab.h:589 [inline]
tty_alloc_file drivers/tty/tty_io.c:187 [inline]
tty_open+0x140/0x1000 drivers/tty/tty_io.c:2140
chrdev_open+0x266/0x770 fs/char_dev.c:414
do_dentry_open+0x4c8/0x11d0 fs/open.c:822
do_open fs/namei.c:3428 [inline]
path_openat+0x1c9a/0x2740 fs/namei.c:3561
do_filp_open+0x1aa/0x400 fs/namei.c:3588
do_sys_openat2+0x16d/0x4d0 fs/open.c:1200
do_sys_open fs/open.c:1216 [inline]
__do_sys_openat fs/open.c:1232 [inline]
__se_sys_openat fs/open.c:1227 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1227
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: 0033:0x7faad02c58d9
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:00007faacd83c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007faad03c9f60 RCX: 00007faad02c58d9
RDX: 0000000000000802 RSI: 0000000020000840 RDI: ffffffffffffff9c
RBP: 00007faad031fcb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe885f0fcf R14: 00007faacd83c300 R15: 0000000000022000
----------------
Code disassembly (best guess), 7 bytes skipped:
0: df 55 48 fists 0x48(%rbp)
3: 89 e5 mov %esp,%ebp
5: 41 57 push %r15
7: 48 8d 85 58 ff ff ff lea -0xa8(%rbp),%rax
e: 41 56 push %r14
10: 49 89 f6 mov %rsi,%r14
13: 41 55 push %r13
15: 4c 8d 7d d8 lea -0x28(%rbp),%r15
19: 48 c1 e8 03 shr $0x3,%rax
1d: 49 89 fd mov %rdi,%r13
20: 41 54 push %r12
22: 53 push %rbx
* 23: 48 81 ec b0 00 00 00 sub $0xb0,%rsp <-- trapping instruction
2a: 48 89 85 50 ff ff ff mov %rax,-0xb0(%rbp)
31: 48 01 d0 add %rdx,%rax
34: 48 rex.W
35: c7 .byte 0xc7
36: 85 58 ff test %ebx,-0x1(%rax)