bridge0: port 1(bridge_slave_0) entered forwarding state
bridge0: topology change detected, propagating
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P12381/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=295525, q=448 ncpus=2)
task:syz.1.12363 state:R running task stack:25592 pid:12381 tgid:12381 ppid:5631 task_flags:0x400040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x1821/0x5740 kernel/sched/core.c:7189
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x760 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:task_css include/linux/cgroup.h:522 [inline]
RIP: 0010:task_cs kernel/cgroup/cpuset-internal.h:205 [inline]
RIP: 0010:cpuset_fork+0x218/0x770 kernel/cgroup/cpuset.c:3635
Code: 3f 65 4c 8b 25 f1 63 79 11 4d 8d ac 24 f8 13 00 00 4c 89 e8 48 c1 e8 03 80 3c 28 00 74 08 4c 89 ef e8 7c f6 70 00 4d 8b 6d 00 53 1e e9 09 89 c5 31 ff 89 c6 e8 b8 bc 05 00 85 ed 74 1e e8 2f
RSP: 0018:ffffc9000731f848 EFLAGS: 00000246
RAX: 1ffff11007058e07 RBX: ffff88803c9b8000 RCX: ffff8880382c5c40
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff81c00a42 R09: ffffffff8e95cca0
R10: dffffc0000000000 R11: ffffffff81c00a20 R12: ffff8880382c5c40
R13: ffff8880312f1800 R14: ffffffff81c00a42 R15: ffffffff8e9aad60
cgroup_post_fork+0x390/0x910 kernel/cgroup/cgroup.c:6986
copy_process+0x40f8/0x4440 kernel/fork.c:2524
kernel_clone+0x284/0x8f0 kernel/fork.c:2721
__do_sys_clone3 kernel/fork.c:3025 [inline]
__se_sys_clone3+0x33c/0x360 kernel/fork.c:3004
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: 0033:0x7f1bcb59dc49
RSP: 002b:00007ffc6c708de8 EFLAGS: 00000202 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007f1bcb5591e0 RCX: 00007f1bcb59dc49
RDX: 00007f1bcb5591e0 RSI: 0000000000000058 RDI: 00007ffc6c708e40
RBP: 00007f1bc97f66c0 R08: 00007f1bc97f66c0 R09: 00007ffc6c708f27
R10: 0000000000000008 R11: 0000000000000202 R12: ffffffffffffffe8
R13: 000000000000006e R14: 00007ffc6c708e40 R15: 00007ffc6c708f28
rcu: rcu_preempt kthread starved for 10503 jiffies! g295525 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:27544 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x1821/0x5740 kernel/sched/core.c:7189
__schedule_loop kernel/sched/core.c:7268 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7283
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+0x389/0x470 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: 1 UID: 0 PID: 12377 Comm: syz.7.12362 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline]
RIP: 0010:smp_call_function_many_cond+0xfd4/0x13d0 kernel/smp.c:892
Code: 89 ee 83 e6 01 31 ff e8 7a 06 0c 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 25 02 0c 00 eb 37 f3 90 43 0f b6 04 2c <84> c0 75 10 41 f7 06 01 00 00 00 74 1e e8 0a 02 0c 00 eb e5 44 89
RSP: 0018:ffffc9000e727ae0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880b873c148 RCX: 0000000000080000
RDX: ffffc9004740b000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc9000e727c10 R08: ffffffff9030ccf7 R09: 1ffffffff206199e
R10: dffffc0000000000 R11: ffffffff81746300 R12: 1ffff110170c8589
R13: dffffc0000000000 R14: ffff8880b8642c48 R15: 0000000000000000
FS: 00007f4218bad6c0(0000) GS:ffff888125389000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1bcb64f0d7 CR3: 00000000aeb60000 CR4: 0000000000350ef0
Call Trace:
clock_was_set+0x70a/0x7d0 kernel/time/hrtimer.c:999
do_settimeofday64+0x340/0x570 kernel/time/timekeeping.c:1603
__do_sys_clock_settime kernel/time/posix-timers.c:1124 [inline]
__se_sys_clock_settime kernel/time/posix-timers.c:1108 [inline]
__x64_sys_clock_settime+0x253/0x2a0 kernel/time/posix-timers.c:1108
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: 0033:0x7f4217d9ce59
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:00007f4218bad028 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3
RAX: ffffffffffffffda RBX: 00007f4218015fa0 RCX: 00007f4217d9ce59
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000000000000000
RBP: 00007f4217e32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4218016038 R14: 00007f4218015fa0 R15: 00007ffc463ac338