rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 GPs behind) idle=86b/1/0x4000000000000000 softirq=46353/46354 fqs=0
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5785/1:b..l
(detected by 0, t=10502 jiffies, g=71189, q=15)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 12922 Comm: syz-executor.3 Not tainted 5.16.0-next-20220118-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_preemption_disabled+0x1b/0x170 lib/smp_processor_id.c:16
Code: 0f 1f 44 00 00 0f 0b e9 23 ff ff ff cc cc cc 41 56 41 55 49 89 f5 41 54 55 48 89 fd 53 0f 1f 44 00 00 65 44 8b 25 ad db a8 76 <65> 8b 1d 9e 31 a9 76 81 e3 ff ff ff 7f 31 ff 89 de 0f 1f 44 00 00
RSP: 0018:ffffc90000dc0dc0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff89ac2f40 RDI: ffffffff8a05ffe0
RBP: ffffffff8a05ffe0 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff8167ba08 R11: 0000000000000000 R12: 0000000000000001
R13: ffffffff89ac2f40 R14: 00000000ffffffff R15: ffff88801c2dc560
FS: 00007f57035f8700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e52e000 CR3: 00000000727ec000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_finish kernel/locking/lockdep.c:438 [inline]
lock_is_held_type+0xd7/0x140 kernel/locking/lockdep.c:5683
lock_is_held include/linux/lockdep.h:283 [inline]
rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:125
trace_hrtimer_cancel include/trace/events/timer.h:290 [inline]
debug_deactivate kernel/time/hrtimer.c:482 [inline]
__run_hrtimer kernel/time/hrtimer.c:1653 [inline]
__hrtimer_run_queues+0xaac/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:__read_once_word_nocheck+0x3/0x10 include/asm-generic/rwonce.h:68
Code: e9 97 fb ff ff 4c 89 f6 48 c7 c7 20 a1 9f 8b e8 93 48 d7 02 e9 60 fb ff ff e8 b9 04 8f 00 e9 cf fb ff ff cc cc cc cc 48 8b 07 66 66 2e 0f 1f 84 00 00 00 00 00 90 41 57 89 d0 41 56 41 55 41
RSP: 0018:ffffc9000679f288 EFLAGS: 00000287
RAX: ffffffff81d43bbe RBX: ffffc9000679f3e0 RCX: ffffc9000679f3e0
RDX: dffffc0000000000 RSI: ffffc9000679fac8 RDI: ffffc9000679fac8
RBP: ffffc9000679fac8 R08: ffffffff8e1d01d4 R09: 0000000000000001
R10: fffff52000cf3e7e R11: 0000000000088078 R12: ffffc9000679f398
R13: ffffc90006798000 R14: ffffc9000679f398 R15: ffffffff8e1d01d8
deref_stack_reg+0xee/0x150 arch/x86/kernel/unwind_orc.c:355
unwind_next_frame+0xcdc/0x1ce0 arch/x86/kernel/unwind_orc.c:534
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 mm/kasan/common.c:45 [inline]
set_alloc_info mm/kasan/common.c:436 [inline]
____kasan_kmalloc mm/kasan/common.c:515 [inline]
____kasan_kmalloc mm/kasan/common.c:474 [inline]
__kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:524
kmalloc_node include/linux/slab.h:599 [inline]
kzalloc_node include/linux/slab.h:726 [inline]
__get_vm_area_node.constprop.0+0xd3/0x380 mm/vmalloc.c:2429
__vmalloc_node_range+0x154/0x1040 mm/vmalloc.c:3095
__vmalloc_node mm/vmalloc.c:3160 [inline]
vzalloc+0x67/0x80 mm/vmalloc.c:3238
n_tty_open+0x16/0x170 drivers/tty/n_tty.c:1813
tty_ldisc_open+0x9b/0x110 drivers/tty/tty_ldisc.c:433
tty_ldisc_setup+0x43/0x100 drivers/tty/tty_ldisc.c:740
tty_init_dev.part.0+0x1f4/0x610 drivers/tty/tty_io.c:1443
tty_init_dev+0x5b/0x80 drivers/tty/tty_io.c:1409
ptmx_open drivers/tty/pty.c:834 [inline]
ptmx_open+0x112/0x360 drivers/tty/pty.c:800
chrdev_open+0x266/0x770 fs/char_dev.c:414
do_dentry_open+0x4b9/0x1240 fs/open.c:824
do_open fs/namei.c:3476 [inline]
path_openat+0x1c9e/0x2940 fs/namei.c:3609
do_filp_open+0x1aa/0x400 fs/namei.c:3636
do_sys_openat2+0x16d/0x4d0 fs/open.c:1214
do_sys_open fs/open.c:1230 [inline]
__do_sys_openat fs/open.c:1246 [inline]
__se_sys_openat fs/open.c:1241 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1241
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: 0033:0x7f5704c82fe9
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:00007f57035f8168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f5704d95f60 RCX: 00007f5704c82fe9
RDX: 0000000000000000 RSI: 0000000020000480 RDI: ffffffffffffff9c
RBP: 00007f5704cdd08d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff2fc8949f R14: 00007f57035f8300 R15: 0000000000022000
task:kworker/u4:13 state:R running task stack:26296 pid: 5785 ppid: 2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4e90 kernel/sched/core.c:6296
preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:6711
irqentry_exit+0x31/0x80 kernel/entry/common.c:425
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5607
Code: 35 a5 7e 83 f8 01 0f 85 b4 02 00 00 9c 58 f6 c4 02 0f 85 9f 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc90005b87b98 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000b70f75 RCX: b8d85598c902f024
RDX: 1ffff110035cc89c RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8ffd2947
R10: fffffbfff1ffa528 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000000 R14: ffffffff8bb83520 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:268 [inline]
rcu_read_lock include/linux/rcupdate.h:694 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0x12d/0xfa0 net/batman-adv/network-coding.c:719
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: rcu_preempt kthread starved for 10502 jiffies! g71189 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:28336 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4e90 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:1963
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2136
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0
CPU: 0 PID: 12923 Comm: syz-executor.4 Not tainted 5.16.0-next-20220118-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_check_gp_kthread_starvation.cold+0x1fb/0x200 kernel/rcu/tree_stall.h:458
print_other_cpu_stall kernel/rcu/tree_stall.h:563 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:706 [inline]
rcu_pending kernel/rcu/tree.c:3919 [inline]
rcu_sched_clock_irq+0x1f7c/0x2150 kernel/rcu/tree.c:2617
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:csd_lock_wait kernel/smp.c:440 [inline]
RIP: 0010:smp_call_function_many_cond+0x44c/0xc90 kernel/smp.c:969
Code: 4d 48 b8 00 00 00 00 00 fc ff df 4d 89 f4 4c 89 f5 49 c1 ec 03 83 e5 07 49 01 c4 83 c5 03 e8 3b 7d 0b 00 f3 90 41 0f b6 04 24 <40> 38 c5 7c 08 84 c0 0f 85 95 06 00 00 8b 43 08 31 ff 83 e0 01 41
RSP: 0018:ffffc90006a7f9e0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b9d3fea0 RCX: 0000000000000000
RDX: ffff888018dad7c0 RSI: ffffffff816ce0c5 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff816ce0eb R11: 0000000000000000 R12: ffffed10173a7fd5
R13: 0000000000000001 R14: ffff8880b9d3fea8 R15: 0000000000000001
on_each_cpu_cond_mask+0x56/0xa0 kernel/smp.c:1135
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:1112 [inline]
text_poke_bp_batch+0x1b1/0x510 arch/x86/kernel/alternative.c:1300
text_poke_flush arch/x86/kernel/alternative.c:1470 [inline]
text_poke_flush arch/x86/kernel/alternative.c:1467 [inline]
text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1477
arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
jump_label_update+0x1da/0x400 kernel/jump_label.c:830
static_key_disable_cpuslocked+0x152/0x1b0 kernel/jump_label.c:207
static_key_disable+0x16/0x20 kernel/jump_label.c:215
tracepoint_remove_func kernel/tracepoint.c:417 [inline]
tracepoint_probe_unregister+0x632/0xc30 kernel/tracepoint.c:551
trace_event_reg+0x181/0x350 kernel/trace/trace_events.c:517
perf_trace_event_unreg.isra.0+0xac/0x2b0 kernel/trace/trace_event_perf.c:162
perf_trace_destroy+0xb5/0xf0 kernel/trace/trace_event_perf.c:243
_free_event+0x2ee/0x1390 kernel/events/core.c:4986
put_event kernel/events/core.c:5080 [inline]
perf_event_release_kernel+0x6f2/0x940 kernel/events/core.c:5195
perf_release+0x33/0x40 kernel/events/core.c:5205
__fput+0x286/0x9f0 fs/file_table.c:311
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f0af54fdc2b
Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44
RSP: 002b:00007ffe9cab9550 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f0af54fdc2b
RDX: 00007f0af5662b00 RSI: ffffffffffffffff RDI: 0000000000000003
RBP: 00007f0af565f960 R08: 0000000000000000 R09: 00007f0af5662b08
R10: 00007ffe9cab9650 R11: 0000000000000293 R12: 00000000000a92fe
R13: 00007ffe9cab9650 R14: 00007f0af565df60 R15: 0000000000000032
----------------
Code disassembly (best guess):
0: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
5: 0f 0b ud2
7: e9 23 ff ff ff jmpq 0xffffff2f
c: cc int3
d: cc int3
e: cc int3
f: 41 56 push %r14
11: 41 55 push %r13
13: 49 89 f5 mov %rsi,%r13
16: 41 54 push %r12
18: 55 push %rbp
19: 48 89 fd mov %rdi,%rbp
1c: 53 push %rbx
1d: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
22: 65 44 8b 25 ad db a8 mov %gs:0x76a8dbad(%rip),%r12d # 0x76a8dbd7
29: 76
* 2a: 65 8b 1d 9e 31 a9 76 mov %gs:0x76a9319e(%rip),%ebx # 0x76a931cf <-- trapping instruction
31: 81 e3 ff ff ff 7f and $0x7fffffff,%ebx
37: 31 ff xor %edi,%edi
39: 89 de mov %ebx,%esi
3b: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)