rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P11372/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=83997, q=373 ncpus=2)
task:udevd state:R running task stack:22656 pid:11372 tgid:11372 ppid:4540 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6924
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6948
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0x130/0x140 kernel/locking/spinlock.c:194
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
__wake_up_common_lock+0x18c/0x1e0 kernel/sched/wait.c:108
sock_def_readable+0x20f/0x5b0 net/core/sock.c:3353
unix_dgram_sendmsg+0x1490/0x1f80 net/unix/af_unix.c:2116
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0x223/0x270 net/socket.c:745
sock_write_iter+0x2dd/0x400 net/socket.c:1160
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa74/0xc90 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb3e7316bf2
RSP: 002b:00007ffd49d7ec58 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb3e7316bf2
RDX: 0000000000000000 RSI: 00007ffd49d7ecaf RDI: 000000000000000a
RBP: 00007ffd49d7ecaf R08: 0000000000000001 R09: 0000000000000000
R10: 000000000000010f R11: 0000000000000246 R12: 000000000000000a
R13: 00007fb3e76edae0 R14: 0000000000000000 R15: 0000563cd74fd910
rcu: rcu_preempt kthread starved for 10533 jiffies! g83997 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:24512 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2000
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 19 Comm: rcu_exp_gp_kthr Not tainted 6.10.0-rc6-syzkaller-00061-ge9d22f7a6655 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:200
Code: 89 fb e8 23 00 00 00 48 8b 3d 7c 8b 45 0c 48 89 de 5b e9 63 40 5a 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 c0 d4 03 00 65 8b 15 60 ad
RSP: 0018:ffffc90000007340 EFLAGS: 00000202
RAX: 0000000080000102 RBX: 0000000000000002 RCX: ffff888017acbc00
RDX: 0000000000000002 RSI: ffffffff8e1a1360 RDI: 0000000000000002
RBP: ffffffff90cd3f12 R08: 0000000000000003 R09: ffffffff8140f6b2
R10: 0000000000000002 R11: ffff888017acbc00 R12: ffffffff90265a64
R13: dffffc0000000000 R14: 1ffff92000000e84 R15: ffffffff90cd3f0e
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f661a654ff0 CR3: 0000000068804000 CR4: 0000000000350ef0
Call Trace:
unwind_next_frame+0x6ef/0x2a00 arch/x86/kernel/unwind_orc.c:505
arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:312 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3940 [inline]
slab_alloc_node mm/slub.c:4002 [inline]
kmem_cache_alloc_node_noprof+0x16b/0x320 mm/slub.c:4045
__alloc_skb+0x1c3/0x440 net/core/skbuff.c:656
__netdev_alloc_skb+0x105/0x560 net/core/skbuff.c:730
netdev_alloc_skb include/linux/skbuff.h:3319 [inline]
dev_alloc_skb include/linux/skbuff.h:3332 [inline]
__ieee80211_beacon_get+0x998/0x15c0 net/mac80211/tx.c:5471
ieee80211_beacon_get_tim+0xb4/0x320 net/mac80211/tx.c:5593
ieee80211_beacon_get include/net/mac80211.h:5562 [inline]
mac80211_hwsim_beacon_tx+0x39d/0x850 drivers/net/wireless/virtual/mac80211_hwsim.c:2302
__iterate_interfaces+0x225/0x4c0 net/mac80211/util.c:772
ieee80211_iterate_active_interfaces_atomic+0xd8/0x170 net/mac80211/util.c:808
mac80211_hwsim_beacon+0xd4/0x1f0 drivers/net/wireless/virtual/mac80211_hwsim.c:2336
__run_hrtimer kernel/time/hrtimer.c:1689 [inline]
__hrtimer_run_queues+0x59d/0xd50 kernel/time/hrtimer.c:1753
hrtimer_run_softirq+0x19a/0x2c0 kernel/time/hrtimer.c:1770
handle_softirqs+0x2c6/0x970 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2010 [inline]
RIP: 0010:vprintk_emit+0x576/0x770 kernel/printk/printk.c:2347
Code: 08 20 00 4c 21 e3 0f 85 3a 01 00 00 e8 63 03 20 00 4d 89 ec 4d 85 ff 75 07 e8 56 03 20 00 eb 06 e8 4f 03 20 00 fb 44 8b 3c 24 <48> c7 c7 60 fa 20 8e 31 f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00
RSP: 0018:ffffc90000187aa0 EFLAGS: 00000293
RAX: ffffffff81762401 RBX: 0000000000000000 RCX: ffff888017acbc00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000187b90 R08: ffffffff817623df R09: 1ffffffff1f5a9b5
R10: dffffc0000000000 R11: fffffbfff1f5a9b6 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffffffff8176225f R15: 0000000000000041
_printk+0xd5/0x120 kernel/printk/printk.c:2373
synchronize_rcu_expedited_wait kernel/rcu/tree_exp.h:577 [inline]
rcu_exp_wait_wake kernel/rcu/tree_exp.h:641 [inline]
rcu_exp_sel_wait_wake+0x858/0x1db0 kernel/rcu/tree_exp.h:675
kthread_worker_fn+0x502/0xaf0 kernel/kthread.c:842
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244