bridge0: received packet on veth0_to_bridge with own address as source address (addr:32:3a:1e:0b:78:cb, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P7434/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=17201, q=869 ncpus=2)
task:syz.4.357 state:R running task stack:24280 pid:7434 tgid:7434 ppid:5830 task_flags:0x400040 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x168f/0x4c70 kernel/sched/core.c:6767
preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6947
preempt_schedule+0xae/0xc0 kernel/sched/core.c:6971
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__local_bh_enable_ip+0x13e/0x1c0 kernel/softirq.c:414
spin_unlock_bh include/linux/spinlock.h:396 [inline]
__fib6_clean_all+0x23c/0x380 net/ipv6/ip6_fib.c:2270
rt6_sync_down_dev net/ipv6/route.c:4951 [inline]
rt6_disable_ip+0x120/0x720 net/ipv6/route.c:4956
addrconf_ifdown+0x15d/0x1880 net/ipv6/addrconf.c:3854
addrconf_notify+0x1bc/0x1010 net/ipv6/addrconf.c:-1
notifier_call_chain+0x1b3/0x3e0 kernel/notifier.c:85
call_netdevice_notifiers_extack net/core/dev.c:2214 [inline]
call_netdevice_notifiers net/core/dev.c:2228 [inline]
unregister_netdevice_many_notify+0x15d4/0x2330 net/core/dev.c:11982
unregister_netdevice_many net/core/dev.c:12046 [inline]
unregister_netdevice_queue+0x33c/0x380 net/core/dev.c:11889
unregister_netdevice include/linux/netdevice.h:3374 [inline]
unregister_netdev+0x1f/0x60 net/core/dev.c:12064
slcan_close+0x78/0x140 drivers/net/can/slcan/slcan-core.c:866
tty_ldisc_kill+0xa3/0x1a0 drivers/tty/tty_ldisc.c:613
tty_ldisc_release+0x1a4/0x200 drivers/tty/tty_ldisc.c:781
tty_release_struct+0x2a/0xd0 drivers/tty/tty_io.c:1690
tty_release+0xcb0/0x1640 drivers/tty/tty_io.c:1861
__fput+0x449/0xa70 fs/file_table.c:465
task_work_run+0x1d1/0x260 kernel/task_work.c:227
resume_user_mode_work+0x5e/0x80 include/linux/resume_user_mode.h:50
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x9a/0x120 kernel/entry/common.c:218
do_syscall_64+0x103/0x210 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd7fe18e969
RSP: 002b:00007ffc4ec5f218 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 0000000000036f00 RCX: 00007fd7fe18e969
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fd7fe3b7ba0 R08: 0000000000000001 R09: 000000104ec5f50f
R10: 00007fd7fe000000 R11: 0000000000000246 R12: 00007fd7fe3b5fac
R13: 00007fd7fe3b5fa0 R14: ffffffffffffffff R15: 00007ffc4ec5f330
rcu: rcu_preempt kthread starved for 7873 jiffies! g17201 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:26712 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x168f/0x4c70 kernel/sched/core.c:6767
preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6947
preempt_schedule+0xae/0xc0 kernel/sched/core.c:6971
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0xfd/0x110 kernel/locking/spinlock.c:194
prepare_to_swait_event+0x341/0x380 kernel/sched/swait.c:119
rcu_gp_fqs_loop+0x2cc/0x1540 kernel/rcu/tree.c:2046
rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2248
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.15.0-rc4-syzkaller-00052-g4f79eaa2ceac #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
RIP: 0010:hlock_class kernel/locking/lockdep.c:233 [inline]
RIP: 0010:mark_lock+0x3c/0x190 kernel/locking/lockdep.c:4732
Code: 00 03 00 83 f9 01 bb 09 00 00 00 83 db 00 83 fa 08 0f 45 da bd 01 00 00 00 89 d9 d3 e5 25 ff 1f 00 00 48 0f a3 05 a4 5a db 11 <73> 10 48 69 c0 c8 00 00 00 48 8d 88 e0 96 1a 93 eb 48 83 3d bb e9
RSP: 0018:ffffc90000007cc8 EFLAGS: 00000003
RAX: 0000000000000054 RBX: 0000000000000009 RCX: 0000000000000009
RDX: 0000000000000008 RSI: ffffffff8dc95d58 RDI: ffffffff8dc95240
RBP: 0000000000000200 R08: 0000000000000000 R09: 0000000000080000
R10: 0000000000000000 R11: ffffffff81ae761e R12: 0000000000064000
R13: 0000000000000000 R14: 0000000000000054 R15: ffffffff8dc95d58
FS: 0000000000000000(0000) GS:ffff888126100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd331cf6ec CR3: 00000000346e0000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_usage kernel/locking/lockdep.c:4675 [inline]
__lock_acquire+0x68c/0xd20 kernel/locking/lockdep.c:5189
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
seqcount_lockdep_reader_access+0xc9/0x1c0 include/linux/seqlock.h:72
ktime_get+0x3e/0x1f0 kernel/time/timekeeping.c:750
tick_nohz_start_idle+0x103/0x290 kernel/time/tick-sched.c:748
tick_irq_exit kernel/softirq.c:647 [inline]
__irq_exit_rcu+0x10e/0x1f0 kernel/softirq.c:686
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:81
Code: 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 03 4b 19 00 f3 0f 1e fa fb f4 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffffff8dc07d80 EFLAGS: 000002c6
RAX: 3e5943256bb1bd00 RBX: ffffffff81973e48 RCX: 3e5943256bb1bd00
RDX: 0000000000000001 RSI: ffffffff8d73675f RDI: ffffffff8bc0fa60
RBP: ffffffff8dc07ec0 R08: ffff8880b8832b5b R09: 1ffff1101710656b
R10: dffffc0000000000 R11: ffffed101710656c R12: ffffffff8f7daa70
R13: 0000000000000000 R14: 0000000000000000 R15: 1ffffffff1b92a48
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:748
default_idle_call+0x74/0xb0 kernel/sched/idle.c:117
cpuidle_idle_call kernel/sched/idle.c:185 [inline]
do_idle+0x1e8/0x510 kernel/sched/idle.c:325
cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:423
rest_init+0x2de/0x300 init/main.c:743
start_kernel+0x470/0x4f0 init/main.c:1099
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:513
x86_64_start_kernel+0x66/0x70 arch/x86/kernel/head64.c:494
common_startup_64+0x13e/0x147
vkms_vblank_simulate: vblank timer overrun
net_ratelimit: 25026 callbacks suppressed
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:32:3a:1e:0b:78:cb, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
net_ratelimit: 27076 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:32:3a:1e:0b:78:cb, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:32:3a:1e:0b:78:cb, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)