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:1b, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P25169/1:b..l P28751/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=295437, q=2341 ncpus=1)
task:syz.5.5851 state:R running task stack:24160 pid:28751 tgid:28750 ppid:5973 task_flags:0x40054c flags:0x00080001
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x1b2a/0x59a0 kernel/sched/core.c:7232
preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:7411
preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline]
_raw_spin_unlock_irqrestore+0x74/0x80 kernel/locking/spinlock.c:198
spin_unlock_irqrestore include/linux/spinlock.h:408 [inline]
lruvec_unlock_irqrestore include/linux/memcontrol.h:1530 [inline]
folios_put_refs+0x8b0/0xb30 mm/folio.c:1026
folio_batch_release include/linux/folio_batch.h:101 [inline]
shmem_undo_range+0x4e6/0x15d0 mm/shmem.c:1160
shmem_truncate_range mm/shmem.c:1288 [inline]
shmem_evict_inode+0x247/0xae0 mm/shmem.c:1419
evict+0x624/0xb50 fs/inode.c:822
dentry_kill+0x1b9/0x880 fs/dcache.c:826
shrink_kill fs/dcache.c:1275 [inline]
shrink_dentry_list+0x209/0x310 fs/dcache.c:1292
shrink_dcache_tree+0xe7/0x410 fs/dcache.c:1725
do_one_tree+0x1a/0xe0 fs/dcache.c:1795
shrink_dcache_for_umount+0x111/0x510 fs/dcache.c:1817
generic_shutdown_super+0x6f/0x2d0 fs/super.c:747
kill_anon_super+0x3b/0x70 fs/super.c:1370
deactivate_locked_super+0xbc/0x110 fs/super.c:603
cleanup_mnt+0x3d3/0x460 fs/namespace.c:1317
task_work_run+0x1d9/0x270 kernel/task_work.c:233
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x73a/0x2360 kernel/exit.c:1008
do_group_exit+0x22d/0x2f0 kernel/exit.c:1151
get_signal+0x121b/0x12c0 kernel/signal.c:3039
arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x138/0x770 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:336 [inline]
do_syscall_64+0x328/0x510 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f22a199e0d9
RSP: 002b:00007f22a28cf028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: 00000000000000a4 RBX: 00007f22a1c25fa0 RCX: 00007f22a199e0d9
RDX: 0000000020008040 RSI: 0000200000009b40 RDI: 0000000000000003
RBP: 00007f22a1a35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f22a1c26038 R14: 00007f22a1c25fa0 R15: 00007ffe39d8a3c8
task:syz-executor state:R running task stack:22320 pid:25169 tgid:25169 ppid:25155 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x1b2a/0x59a0 kernel/sched/core.c:7232
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7554
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x910 kernel/entry/common.c:167
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x231/0x350 kernel/locking/lockdep.c:5913
Code: ff ff ff e8 81 46 38 0a f7 44 24 10 00 02 00 00 0f 84 39 ff ff ff 65 48 8b 05 db 51 ce 11 48 3b 44 24 50 75 33 fb 48 83 c4 58 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 40 49 3b 0a cc 48 8d 3d 68 45 b9
RSP: 0018:ffffc9000480f1c8 EFLAGS: 00000282
RAX: 17b75ac72ba4da00 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 00000000fdb47e57 RSI: ffffffff8e4d9480 RDI: ffffffff8c4c7680
RBP: ffff88802ea13e80 R08: cf00000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8eb5c6a0 R12: ffffffff8eb5c6a0
R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
class_rcu_constructor include/linux/rcupdate.h:1216 [inline]
unwind_next_frame+0xac/0x2550 arch/x86/kernel/unwind_orc.c:495
__unwind_start+0x514/0x660 arch/x86/kernel/unwind_orc.c:787
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xe3/0x150 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_stack+0x122/0x230 mm/page_owner.c:183
__reset_page_owner+0x71/0x1f0 mm/page_owner.c:338
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
free_unref_folios+0xdc2/0x14e0 mm/page_alloc.c:3080
folios_put_refs+0x9e9/0xb30 mm/folio.c:1034
folio_batch_release include/linux/folio_batch.h:101 [inline]
shmem_undo_range+0x4e6/0x15d0 mm/shmem.c:1160
shmem_truncate_range mm/shmem.c:1288 [inline]
shmem_evict_inode+0x247/0xae0 mm/shmem.c:1419
evict+0x624/0xb50 fs/inode.c:822
filename_unlinkat+0x43f/0x610 fs/namei.c:5723
__do_sys_unlink fs/namei.c:5754 [inline]
__se_sys_unlink+0x2e/0x140 fs/namei.c:5751
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x510 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5faa99d1c7
RSP: 002b:00007fff3c38c068 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5faa99d1c7
RDX: 00007fff3c38c090 RSI: 00007fff3c38c120 RDI: 00007fff3c38c120
RBP: 00007fff3c38c120 R08: 00007fff3c38d120 R09: 00000000ffffffff
R10: 0000000000000100 R11: 0000000000000206 R12: 00007fff3c38d1b0
R13: 00007f5faaa34474 R14: 00000000001aad66 R15: 00007fff3c38d1f0
rcu: rcu_preempt kthread starved for 8105 jiffies! g295437 f0x0 RCU_GP_WAIT_FQS(5) ->state=R ->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:27496 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x1b2a/0x59a0 kernel/sched/core.c:7232
__schedule_loop kernel/sched/core.c:7309 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7324
schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x30c/0x11f0 kernel/rcu/tree.c:2122
rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2330
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: 3225 Comm: kworker/R-bat_e Tainted: G L syzkaller #0 PREEMPT(lazy)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: bat_events batadv_tt_purge
RIP: 0010:lock_acquire+0x231/0x350 kernel/locking/lockdep.c:5913
Code: ff ff ff e8 81 46 38 0a f7 44 24 10 00 02 00 00 0f 84 39 ff ff ff 65 48 8b 05 db 51 ce 11 48 3b 44 24 50 75 33 fb 48 83 c4 58 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 40 49 3b 0a cc 48 8d 3d 68 45 b9
RSP: 0018:ffffc90000006d18 EFLAGS: 00000286
RAX: 9c7d52dfc5d19e00 RBX: 0000000000000000 RCX: 0000000080000101
RDX: 000000004dbb4af1 RSI: ffffffff8e4d9480 RDI: ffffffff8c4c7680
RBP: ffff888033040000 R08: 2500000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8eb5c6a0 R12: ffffffff8eb5c6a0
R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000246
FS: 0000000000000000(0000) GS:ffff888124f0c000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff462406fc CR3: 0000000074de0000 CR4: 00000000003526f0
Call Trace:
rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
net_generic+0x3a/0x240 include/net/netns/generic.h:45
is_pppoe_ip net/bridge/br_netfilter_hooks.c:123 [inline]
br_nf_post_routing+0x47d/0xee0 net/bridge/br_netfilter_hooks.c:945
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook include/linux/netfilter.h:280 [inline]
NF_HOOK+0x23e/0x3f0 include/linux/netfilter.h:323
br_forward_finish+0xd3/0x130 net/bridge/br_forward.c:66
br_nf_hook_thresh net/bridge/br_netfilter_hooks.c:1165 [inline]
br_nf_forward_finish+0xa76/0xea0 net/bridge/br_netfilter_hooks.c:667
NF_HOOK+0x64e/0x6e0 include/linux/netfilter.h:325
br_nf_forward_ip+0x7eb/0xa30 net/bridge/br_netfilter_hooks.c:721
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook include/linux/netfilter.h:280 [inline]
NF_HOOK+0x23e/0x3f0 include/linux/netfilter.h:323
__br_forward+0x397/0x540 net/bridge/br_forward.c:115
br_handle_frame_finish+0x1175/0x1990 net/bridge/br_input.c:229
br_nf_hook_thresh+0x3dd/0x4c0 net/bridge/br_netfilter_hooks.c:-1
br_nf_pre_routing_finish_ipv6+0x90c/0xc40 net/bridge/br_netfilter_ipv6.c:-1
NF_HOOK include/linux/netfilter.h:325 [inline]
br_nf_pre_routing_ipv6+0x382/0x6f0 net/bridge/br_netfilter_ipv6.c:183
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:291 [inline]
br_handle_frame+0x127f/0x1510 net/bridge/br_input.c:442
__netif_receive_skb_core+0x989/0x30b0 net/core/dev.c:6128
__netif_receive_skb_one_core net/core/dev.c:6239 [inline]
__netif_receive_skb net/core/dev.c:6354 [inline]
process_backlog+0x706/0x1860 net/core/dev.c:6705
__napi_poll+0xaa/0x330 net/core/dev.c:7764
napi_poll net/core/dev.c:7827 [inline]
net_rx_action+0x61d/0xf50 net/core/dev.c:7984
handle_softirqs+0x225/0x840 kernel/softirq.c:622
do_softirq+0x76/0xd0 kernel/softirq.c:523
__local_bh_enable_ip+0xf8/0x130 kernel/softirq.c:450
spin_unlock_bh include/linux/spinlock.h:396 [inline]
batadv_tt_local_purge+0x2c1/0x340 net/batman-adv/translation-table.c:1366
batadv_tt_purge+0x35/0xa10 net/batman-adv/translation-table.c:3565
process_one_work kernel/workqueue.c:3375 [inline]
process_scheduled_works+0xc4e/0x1630 kernel/workqueue.c:3458
rescuer_thread+0x7c5/0x10e0 kernel/workqueue.c:3682
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
net_ratelimit: 2346 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 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:1b, 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:1b, 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:1b, 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:1b, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)