rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P27046/1:b..l P14333/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=317469, q=550 ncpus=2)
task:kworker/u4:1 state:R running task stack:26480 pid:14333 tgid:14333 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0xf12/0x5c60 kernel/sched/core.c:6727
preempt_schedule_irq+0x52/0x90 kernel/sched/core.c:7047
irqentry_exit+0x36/0x90 kernel/entry/common.c:348
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:lock_acquire+0x1ef/0x520 kernel/locking/lockdep.c:5722
Code: c1 05 fd c5 97 7e 83 f8 01 0f 85 b8 02 00 00 9c 58 f6 c4 02 0f 85 a3 02 00 00 48 85 ed 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:ffffc9000c61fac8 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff920018c3f5b RCX: 0000000072631b06
RDX: 0000000000000001 RSI: ffffffff8b0cb6a0 RDI: ffffffff8b6e9900
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff27a99f8
R10: ffffffff93d4cfc7 R11: 0000000000000002 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8d7ad220 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
rcu_read_lock include/linux/rcupdate.h:750 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0x16e/0x10f0 net/batman-adv/network-coding.c:719
process_one_work+0x889/0x15e0 kernel/workqueue.c:2633
process_scheduled_works kernel/workqueue.c:2706 [inline]
worker_thread+0x8b9/0x12a0 kernel/workqueue.c:2787
kthread+0x2c6/0x3b0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
task:udevd state:R running task stack:28032 pid:27046 tgid:27046 ppid:4513 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0xf12/0x5c60 kernel/sched/core.c:6727
preempt_schedule_common+0x45/0xd0 kernel/sched/core.c:6904
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0x61/0x80 kernel/locking/spinlock.c:194
sock_def_readable+0x156/0x750 net/core/sock.c:3342
unix_dgram_sendmsg+0x11b9/0x1d10 net/unix/af_unix.c:2099
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
sock_write_iter+0x50a/0x5c0 net/socket.c:1160
call_write_iter include/linux/fs.h:2087 [inline]
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0x6de/0x1110 fs/read_write.c:590
ksys_write+0x1f8/0x260 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fd46ab16bf2
RSP: 002b:00007ffc71967058 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd46ab16bf2
RDX: 0000000000000000 RSI: 00007ffc719670af RDI: 000000000000000a
RBP: 00007ffc719670af R08: 0000000000000001 R09: 0000000000000000
R10: 000000000000010f R11: 0000000000000246 R12: 000000000000000a
R13: 00007fd46af92ae0 R14: 0000000000000000 R15: 00005639a5cb62c0
rcu: rcu_preempt kthread starved for 10548 jiffies! g317469 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:28256 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0xf12/0x5c60 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0xe9/0x280 kernel/sched/core.c:6817
schedule_timeout+0x137/0x2a0 kernel/time/timer.c:2183
rcu_gp_fqs_loop+0x1ec/0xb20 kernel/rcu/tree.c:1663
rcu_gp_kthread+0x24b/0x380 kernel/rcu/tree.c:1862
kthread+0x2c6/0x3b0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 27064 Comm: syz-executor.0 Not tainted 6.8.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 8b 74 24 08 48 89 fb 48 83 c7 18 e8 8a c9 a2 f6 48 89 df e8 72 44 a3 f6 e8 7d 72 ca f6 fb bf 01 00 00 00 b2 90 94 f6 65 8b 05 53 d7 3b 75 85 c0 74 06 5b c3 cc cc cc cc
RSP: 0018:ffffc9000457fcf8 EFLAGS: 00000206
RAX: 000000000365b20f RBX: ffff888022425340 RCX: 1ffffffff1f3a639
RDX: 0000000000000000 RSI: ffffffff8b0cb3a0 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8f9d6457 R11: 0000000000000000 R12: ffff8880224257d8
R13: 0000000000000021 R14: ffff888022425740 R15: 1ffff920008affae
FS: 00007f5c0847f6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5c0847ef00 CR3: 000000009464c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
spin_unlock_irq include/linux/spinlock.h:401 [inline]
get_signal+0x189d/0x2790 kernel/signal.c:2896
arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
syscall_exit_to_user_mode+0x14d/0x2a0 kernel/entry/common.c:212
do_syscall_64+0xe5/0x270 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f5c0767dda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5c0847f0c8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007f5c077ac050 RCX: 00007f5c0767dda9
RDX: 000000002006b000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f5c076ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f5c077ac050 R15: 00007fffc169f7b8