rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P37/1:b..l
(detected by 1, t=10502 jiffies, g=27449, q=581 ncpus=2)
task:kworker/u4:2 state:R running task stack:22368 pid:37 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6561
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6873
irqentry_exit+0x53/0x80 kernel/entry/common.c:439
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:lock_acquire+0x26f/0x5a0 kernel/locking/lockdep.c:5666
Code: 2b 00 74 08 4c 89 f7 e8 cf b2 77 00 f6 44 24 61 02 0f 85 84 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc90000ae7a80 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff9200015cf5c RCX: 1ffff9200015cefc
RDX: dffffc0000000000 RSI: ffffffff8aec13c0 RDI: ffffffff8b3d48a0
RBP: ffffc90000ae7be0 R08: dffffc0000000000 R09: fffffbfff2093845
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200015cf58
R13: dffffc0000000000 R14: ffffc90000ae7ae0 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
rcu_read_lock include/linux/rcupdate.h:791 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0xe8/0x610 net/batman-adv/network-coding.c:719
process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: rcu_preempt kthread starved for 10521 jiffies! g27449 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:25816 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6561
schedule+0xbf/0x180 kernel/sched/core.c:6637
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1965
rcu_gp_fqs_loop+0x2d2/0x1150 kernel/rcu/tree.c:1706
rcu_gp_kthread+0xa3/0x3b0 kernel/rcu/tree.c:1905
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 7016 Comm: syz.4.1048 Not tainted 6.1.100-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:unwind_next_frame+0xb3/0x2220 arch/x86/kernel/unwind_orc.c:433
Code: c1 10 00 00 89 84 24 9c 00 00 00 48 89 8c 24 a0 00 00 00 4c 89 bc 24 80 00 00 00 48 89 6c 24 28 bf 01 00 00 00 e8 2d bd 21 00 <48> 89 1c 24 48 83 c3 50 48 89 d8 48 c1 e8 03 48 89 44 24 40 42 80
RSP: 0018:ffffc900001e04a0 EFLAGS: 00000206
RAX: 0000000000000104 RBX: ffffc900001e0580 RCX: ffffffff91c94103
RDX: dffffc0000000000 RSI: ffffffff817ee933 RDI: 0000000000000001
RBP: 1ffff9200003c0b0 R08: 0000000000000014 R09: ffffc900001e0670
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88801fcf0000
R13: ffffffff81785510 R14: dffffc0000000000 R15: ffffffff817ee933
FS: 00007f67dc38d6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f67dc38cfa8 CR3: 000000005e5d2000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x10d/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516
____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1724 [inline]
slab_free_freelist_hook mm/slub.c:1750 [inline]
slab_free mm/slub.c:3661 [inline]
kmem_cache_free+0x292/0x510 mm/slub.c:3683
tcp_write_queue_purge+0x132/0x2f0 net/ipv4/tcp.c:3098
tcp_write_err net/ipv4/tcp_timer.c:73 [inline]
tcp_write_timeout net/ipv4/tcp_timer.c:277 [inline]
tcp_retransmit_timer+0x133a/0x28a0 net/ipv4/tcp_timer.c:551
tcp_write_timer+0x12e/0x280 net/ipv4/tcp_timer.c:680
call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504
expire_timers kernel/time/timer.c:1549 [inline]
__run_timers+0x67c/0x890 kernel/time/timer.c:1820
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571
__do_softirq kernel/softirq.c:605 [inline]
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x157/0x240 kernel/softirq.c:654
irq_exit_rcu+0x5/0x20 kernel/softirq.c:666
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:strlen+0x2d/0x60 lib/string.c:495
Code: 56 41 54 53 49 89 fe 48 c7 c0 ff ff ff ff 49 bf 00 00 00 00 00 fc ff df 48 89 fb 49 89 c4 48 89 d8 48 c1 e8 03 42 0f b6 04 38 <84> c0 75 12 48 ff c3 49 8d 44 24 01 43 80 7c 26 01 00 75 dd eb 13
RSP: 0018:ffffc9000aa1f858 EFLAGS: 00000a06
RAX: 0000000000000000 RBX: ffffffff8aee476b RCX: 000000000aa1f903
RDX: ffffffff817ed93c RSI: ffffc90000a11620 RDI: ffffffff8aee4760
RBP: ffffc9000aa1f990 R08: dffffc0000000000 R09: fffffbfff1ce7086
R10: 0000000000000000 R11: dffffc0000000001 R12: 000000000000000a
R13: ffffffff817ed93c R14: ffffffff8aee4760 R15: dffffc0000000000
trace_event_get_offsets_lock include/trace/events/lock.h:50 [inline]
perf_trace_lock+0x10c/0x440 include/trace/events/lock.h:50
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0x995/0xa20 kernel/locking/lockdep.c:5673
__raw_spin_unlock include/linux/spinlock_api_smp.h:141 [inline]
_raw_spin_unlock+0x12/0x40 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
futex_queue kernel/futex/futex.h:174 [inline]
futex_wait_queue+0x9c/0x1d0 kernel/futex/waitwake.c:338
futex_wait+0x203/0x5c0 kernel/futex/waitwake.c:656
do_futex+0x3b5/0x490 kernel/futex/syscalls.c:106
__do_sys_futex kernel/futex/syscalls.c:183 [inline]
__se_sys_futex+0x3d7/0x460 kernel/futex/syscalls.c:164
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f67db575b59
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f67dc38d0f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f67db706040 RCX: 00007f67db575b59
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f67db706040
RBP: 00007f67db706038 R08: 00007f67dc38d6c0 R09: 00007f67dc38d6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f67db706044
R13: 000000000000006e R14: 00007ffcae408d00 R15: 00007ffcae408de8