rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P14165/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=90757, q=156 ncpus=2)
task:dhcpcd-run-hook state:R running task stack:26744 pid:14165 tgid:14165 ppid:14144 task_flags:0x40004c flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5354 [inline]
__schedule+0x165c/0x5520 kernel/sched/core.c:6966
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7294
irqentry_exit+0x5e4/0x700 kernel/entry/common.c:240
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:unwind_next_frame+0x855/0x2550 arch/x86/kernel/unwind_orc.c:536
Code: 6e b8 00 48 8b 3b 48 85 ff 0f 84 4e 0e 00 00 48 83 c7 60 e9 aa 02 00 00 83 fb 03 0f 84 65 01 00 00 83 fb 04 0f 85 d7 0c 00 00 <49> 8d 5e 40 48 89 d8 48 c1 e8 03 80 3c 28 00 74 11 48 89 df e8 d2
RSP: 0018:ffffc9000206f558 EFLAGS: 00000246
RAX: ffffc9000206f65d RBX: 0000000000000004 RCX: ffffffff90345330
RDX: ffffffff90b55568 RSI: ffffffff90b5556c RDI: ffffffff8c288320
RBP: dffffc0000000000 R08: 000000000000000c R09: ffffffff8e75d0e0
R10: ffffc9000206f678 R11: ffffffff81b15b50 R12: ffffffff90b5556d
R13: 1ffff9200040dec5 R14: ffffc9000206f628 R15: ffffc9000206f660
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57
kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556
slab_free_hook mm/slub.c:2650 [inline]
slab_free mm/slub.c:6242 [inline]
kmem_cache_free+0x44f/0x650 mm/slub.c:6369
tear_down_vmas+0x312/0x520 mm/mmap.c:1262
exit_mmap+0x4b6/0x9e0 mm/mmap.c:1320
__mmput+0x118/0x430 kernel/fork.c:1177
exit_mm+0x18e/0x250 kernel/exit.c:581
do_exit+0x6a2/0x22c0 kernel/exit.c:962
do_group_exit+0x21b/0x2d0 kernel/exit.c:1116
__do_sys_exit_group kernel/exit.c:1127 [inline]
__se_sys_exit_group kernel/exit.c:1125 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1125
x64_sys_call+0x221a/0x2240 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f008c4296c5
RSP: 002b:00007ffc379149e8 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007ffc37914d04 RCX: 00007f008c4296c5
RDX: 00000000000000e7 RSI: ffffffffffffff88 RDI: 0000000000000000
RBP: 0000000000000003 R08: 00007ffc37914ae0 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 00007ffc37914d20 R14: 00007f008c639000 R15: 0000558358ff1d98
rcu: rcu_preempt kthread timer wakeup didn't happen for 10540 jiffies! g90757 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=45180
rcu: rcu_preempt kthread starved for 10541 jiffies! g90757 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:27736 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5354 [inline]
__schedule+0x165c/0x5520 kernel/sched/core.c:6966
__schedule_loop kernel/sched/core.c:7049 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7064
schedule_timeout+0x158/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x312/0x11d0 kernel/rcu/tree.c:2095
rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2297
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 14164 Comm: syz.6.1746 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:63
Code: cc 6d 02 c3 cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 63 01 17 00 fb f4 bc ef 02 00 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffc900024df668 EFLAGS: 000002d3
RAX: ffffffff8176480a RBX: 0000000000000003 RCX: ffff888021689e80
RDX: 0000000000000000 RSI: ffffffff8df45c2e RDI: ffffffff8c288380
RBP: 0000000000000003 R08: ffffffff90128af7 R09: 1ffffffff202515e
R10: dffffc0000000000 R11: fffffbfff202515f R12: 0000000000000200
R13: 0000000000000000 R14: ffff88803768ca50 R15: dffffc0000000000
FS: 00007f3109f316c0(0000) GS:ffff88812543f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000007038 CR3: 0000000034a6e000 CR4: 00000000003526f0
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:62 [inline]
kvm_wait+0x10f/0x150 arch/x86/kernel/kvm.c:1095
pv_wait arch/x86/include/asm/paravirt-spinlock.h:83 [inline]
pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:466 [inline]
__pv_queued_spin_lock_slowpath+0x74c/0xbc0 kernel/locking/qspinlock.c:325
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt-spinlock.h:35 [inline]
queued_spin_lock_slowpath arch/x86/include/asm/paravirt-spinlock.h:66 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
do_raw_spin_lock+0x26c/0x2f0 kernel/locking/spinlock_debug.c:116
spin_lock_bh include/linux/spinlock.h:348 [inline]
lock_sock_nested+0x6a/0x100 net/core/sock.c:3799
lock_sock include/net/sock.h:1713 [inline]
tipc_sendstream+0x47/0x70 net/tipc/socket.c:1545
sock_sendmsg_nosec net/socket.c:786 [inline]
__sock_sendmsg net/socket.c:801 [inline]
____sys_sendmsg+0x972/0x9f0 net/socket.c:2650
___sys_sendmsg+0x2a5/0x360 net/socket.c:2704
__sys_sendmmsg+0x27c/0x4e0 net/socket.c:2793
__do_sys_sendmmsg net/socket.c:2820 [inline]
__se_sys_sendmmsg net/socket.c:2817 [inline]
__x64_sys_sendmmsg+0xa0/0xc0 net/socket.c:2817
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3108f9c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3109f31028 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f3109215fa0 RCX: 00007f3108f9c799
RDX: 00000000040001b6 RSI: 0000200000001540 RDI: 0000000000000003
RBP: 00007f3109032c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3109216038 R14: 00007f3109215fa0 R15: 00007fff9d96aad8