rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P981/1:b..l
(detected by 1, t=10502 jiffies, g=410469, q=106)
task:kworker/u4:4 state:R running task stack:24872 pid: 981 ppid: 2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:6668
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:rcu_preempt_read_exit kernel/rcu/tree_plugin.h:382 [inline]
RIP: 0010:__rcu_read_unlock+0x6e/0x570 kernel/rcu/tree_plugin.h:419
Code: 8b 24 25 40 70 02 00 49 8d bc 24 3c 04 00 00 8b 9d 3c 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 eb 01 83 c0 03 38 d0 7c 08 84 d2 0f 85 cc 01
RSP: 0018:ffffc90004e4fc60 EFLAGS: 00000217
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff88e04fce RDI: ffff88801bae213c
RBP: ffff88801bae1d00 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff88e04fc1 R11: 0000000000000000 R12: ffff88801bae1d00
R13: 0000000000000000 R14: dffffc0000000000 R15: 00000000000002ee
rcu_read_unlock include/linux/rcupdate.h:720 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:416 [inline]
batadv_nc_worker+0x853/0xfa0 net/batman-adv/network-coding.c:723
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g410469 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=149808
rcu: rcu_preempt kthread starved for 10502 jiffies! g410469 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:28656 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 18575 Comm: syz-executor.4 Not tainted 5.16.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:29 [inline]
RIP: 0010:rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:330 [inline]
RIP: 0010:rcu_is_watching+0x58/0xb0 kernel/rcu/tree.c:1121
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 75 51 48 03 1c ed a0 28 56 8b 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 0f b6 14 02 <48> 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 19 8b 03 83 e0 01
RSP: 0018:ffffc90000007ca8 EFLAGS: 00000012
RAX: dffffc0000000000 RBX: ffff8880b9c3aa50 RCX: ffffffff815cc618
RDX: 0000000000000000 RSI: 0000000000010004 RDI: ffffffff8b5628a0
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8d912997
R10: fffffbfff1b22532 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: ffff888037d97b00 R15: 0000000000000000
FS: 00005555563e0400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000040 CR3: 00000000738f8000 CR4: 0000000000350ef0
Call Trace:
rcu_read_lock_held_common kernel/rcu/update.c:108 [inline]
rcu_read_lock_sched_held+0x1c/0x70 kernel/rcu/update.c:123
trace_lock_acquire include/trace/events/lock.h:13 [inline]
lock_acquire+0x442/0x510 kernel/locking/lockdep.c:5608
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:349 [inline]
advance_sched+0x53/0x9a0 net/sched/sch_taprio.c:714
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x609/0xe50 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:finish_task_switch.isra.0+0x323/0xb80 kernel/sched/core.c:4852
Code: 33 78 f3 07 85 c0 75 02 0f 0b 48 85 db 0f 85 25 01 00 00 4c 89 f7 e8 fc f7 ff ff e8 c7 46 2d 00 fb 65 48 8b 1c 25 40 70 02 00 <48> 8d bb 80 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc90006057a18 EFLAGS: 00000206
RAX: 000000000000270f RBX: ffff88803f231d00 RCX: 1ffffffff1b21fc1
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90006057a60 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817def48 R11: 0000000000000001 R12: ffff8880b9c3a7d8
R13: ffff88803d34ba00 R14: ffff8880b9c39a80 R15: ffff8880b9c3a4b8
context_switch kernel/sched/core.c:4975 [inline]
__schedule+0xaa2/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
freezable_schedule include/linux/freezer.h:172 [inline]
futex_wait_queue+0x144/0x3b0 kernel/futex/waitwake.c:355
futex_wait+0x2c9/0x670 kernel/futex/waitwake.c:656
do_futex+0x205/0x390 kernel/futex/syscalls.c:122
__do_sys_futex kernel/futex/syscalls.c:199 [inline]
__se_sys_futex kernel/futex/syscalls.c:180 [inline]
__x64_sys_futex+0x1b0/0x4a0 kernel/futex/syscalls.c:180
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: 0033:0x7f76e1843ae9
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:00007ffe11dfd7d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 0000000000000032 RCX: 00007f76e1843ae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f76e1956f6c
RBP: 00007f76e1956f6c R08: 00007ffe11f6d080 R09: 0000000000000000
R10: 00007ffe11dfd8b0 R11: 0000000000000246 R12: 0000000000240b4b
R13: 00000000000003e8 R14: 00007f76e1956f60 R15: 0000000000240b37
----------------
Code disassembly (best guess):
0: 8b 24 25 40 70 02 00 mov 0x27040,%esp
7: 49 8d bc 24 3c 04 00 lea 0x43c(%r12),%rdi
e: 00
f: 8b 9d 3c 04 00 00 mov 0x43c(%rbp),%ebx
15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
1c: fc ff df
1f: 48 89 fa mov %rdi,%rdx
22: 48 c1 ea 03 shr $0x3,%rdx
26: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx
* 2a: 48 89 f8 mov %rdi,%rax <-- trapping instruction
2d: 83 e0 07 and $0x7,%eax
30: 83 eb 01 sub $0x1,%ebx
33: 83 c0 03 add $0x3,%eax
36: 38 d0 cmp %dl,%al
38: 7c 08 jl 0x42
3a: 84 d2 test %dl,%dl
3c: 0f .byte 0xf
3d: 85 cc test %ecx,%esp
3f: 01 .byte 0x1