rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P2571/1:b..l P21678/1:b..l P4674/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=111393, q=231 ncpus=2)
task:udevd state:R running task stack:24176 pid:4674 tgid:4674 ppid:1 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0xe37/0x5490 kernel/sched/core.c:6529
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6708
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
wp_page_copy mm/memory.c:3453 [inline]
do_wp_page+0x15fd/0x3430 mm/memory.c:3744
handle_pte_fault mm/memory.c:5554 [inline]
__handle_mm_fault+0x2474/0x5650 mm/memory.c:5681
handle_mm_fault+0x498/0xa60 mm/memory.c:5849
do_user_addr_fault+0x60d/0x13f0 arch/x86/mm/fault.c:1338
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x562d15d50e9c
RSP: 002b:00007ffcdd4b55f8 EFLAGS: 00010246
RAX: 0000562d299f6138 RBX: 0000562d299f6130 RCX: 000000000000001f
RDX: 0000562d299d0e00 RSI: 0000562d299c2010 RDI: 0000562d299f6240
RBP: 0000562d299f6240 R08: 0000000000000000 R09: ae95a2961732cd02
R10: d00103b0a134fd1f R11: 0000000000000007 R12: 0000000000000000
R13: 0000000200000001 R14: 0000000000000000 R15: 0000000000000000
task:udevd state:R running task stack:28464 pid:21678 tgid:21678 ppid:4674 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0xe37/0x5490 kernel/sched/core.c:6529
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6708
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
wp_page_copy mm/memory.c:3453 [inline]
do_wp_page+0x15fd/0x3430 mm/memory.c:3744
handle_pte_fault mm/memory.c:5554 [inline]
__handle_mm_fault+0x2474/0x5650 mm/memory.c:5681
handle_mm_fault+0x498/0xa60 mm/memory.c:5849
do_user_addr_fault+0x60d/0x13f0 arch/x86/mm/fault.c:1338
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f9779cc72a4
RSP: 002b:00007ffcdd4b5380 EFLAGS: 00010206
RAX: 0000000000000003 RBX: 0000000000000003 RCX: 0000562d299eb0e0
RDX: 000056284b4c293c RSI: 0000000000000000 RDI: 0000562d299dccf0
RBP: 0000562d299dcce0 R08: 0000000000000007 R09: ae95a2961732cd02
R10: de738169618cfccf R11: 0000000000000007 R12: 0000000000000000
R13: 0000562d299dcd10 R14: 00007f9779df1aa0 R15: 0000562d299c22c0
task:kworker/u8:11 state:R running task stack:22256 pid:2571 tgid:2571 ppid:2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0xe37/0x5490 kernel/sched/core.c:6529
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:6851
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:115 [inline]
RIP: 0010:lock_release+0xee/0x6f0 kernel/locking/lockdep.c:5772
Code: 00 fc ff df 48 89 ea 48 c1 ea 03 0f b6 14 02 48 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 03 05 00 00 8b 3d 5a 02 b4 0e <85> ff 0f 84 e5 02 00 00 65 8b 05 3b c1 98 7e 85 c0 0f 85 d6 02 00
RSP: 0018:ffffc90008f17ac8 EFLAGS: 00000246
RAX: 0000000000000003 RBX: 1ffff920011e2f5b RCX: ffffffff8169c9f9
RDX: 0000000000000000 RSI: ffffffff8bb11820 RDI: 0000000000000001
RBP: ffffffff901dcc98 R08: 0000000000000000 R09: fffffbfff203b333
R10: ffffffff901d999f R11: 0000000000000000 R12: ffffffff8ddba6a0
R13: 000000000003d8cc R14: 000000000003d8cc R15: dffffc0000000000
rcu_lock_release include/linux/rcupdate.h:336 [inline]
rcu_read_unlock include/linux/rcupdate.h:869 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0x88c/0x1060 net/batman-adv/network-coding.c:719
process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3393
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: rcu_preempt kthread starved for 10568 jiffies! g111393 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:27680 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0xe37/0x5490 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6621
schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2034
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2236
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 21618 Comm: syz.4.1281 Not tainted 6.11.0-syzkaller-02574-ga430d95c5efa #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:hlock_class+0x56/0x130 kernel/locking/lockdep.c:227
Code: 20 66 81 e3 ff 1f 0f b7 db be 08 00 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 00 d7 9c 96 e8 12 ba 81 00 48 0f a3 1d 7a f4 33 15 <73> 13 48 69 c3 c8 00 00 00 5b 48 05 20 db 9c 96 c3 cc cc cc cc 48
RSP: 0018:ffffc9000471fa80 EFLAGS: 00000047
RAX: 0000000000000001 RBX: 00000000000000b5 RCX: ffffffff8168e27e
RDX: fffffbfff2d39ae3 RSI: 0000000000000008 RDI: ffffffff969cd710
RBP: ffffffff969cf4e8 R08: 0000000000000000 R09: fffffbfff2d39ae2
R10: ffffffff969cd717 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88803443a930 R14: 0000000000000002 R15: ffff888034439e00
FS: 00007f8028b156c0(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562d299dccf0 CR3: 00000000591b4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lookup_chain_cache_add kernel/locking/lockdep.c:3780 [inline]
validate_chain kernel/locking/lockdep.c:3836 [inline]
__lock_acquire+0x1620/0x3cb0 kernel/locking/lockdep.c:5142
lock_acquire kernel/locking/lockdep.c:5759 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
__lock_task_sighand+0xc2/0x340 kernel/signal.c:1412
lock_task_sighand include/linux/sched/signal.h:746 [inline]
do_send_sig_info kernel/signal.c:1300 [inline]
group_send_sig_info+0x290/0x300 kernel/signal.c:1451
bpf_send_signal_common+0x2e8/0x3a0 kernel/trace/bpf_trace.c:881
____bpf_send_signal kernel/trace/bpf_trace.c:886 [inline]
bpf_send_signal+0x19/0x30 kernel/trace/bpf_trace.c:884
bpf_prog_7ba5217f62dcd359+0x40/0x44
bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline]
__bpf_prog_run include/linux/filter.h:691 [inline]
bpf_prog_run include/linux/filter.h:698 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2406 [inline]
bpf_trace_run2+0x231/0x590 kernel/trace/bpf_trace.c:2447
trace_sys_enter include/trace/events/syscalls.h:18 [inline]
syscall_trace_enter+0x1b2/0x240 kernel/entry/common.c:61
syscall_enter_from_user_mode_work include/linux/entry-common.h:168 [inline]
syscall_enter_from_user_mode include/linux/entry-common.h:198 [inline]
do_syscall_64+0x1ee/0x250 arch/x86/entry/common.c:79
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8027d19879
Code: 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 90 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 c7 c0 0f 00 00 00 0f 05 <0f> 1f 80 00 00 00 00 48 81 ec 48 01 00 00 49 89 d0 64 48 8b 04 25
RSP: 002b:00007f8028b14b40 EFLAGS: 00000246 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 00007f8027f35f88 RCX: 00007f8027d19879
RDX: 00007f8028b14b40 RSI: 00007f8028b14c70 RDI: 0000000000000011
RBP: 00007f8027f35f80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8027f35f8c
R13: 0000000000000000 R14: 00007ffe11fd1730 R15: 00007ffe11fd1818