bridge0: received packet on veth0_to_bridge with own address as source address (addr:12:c6:fb:b1:49:40, vlan:1)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P27891/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=168753, q=1249 ncpus=2)
task:syz.7.5308 state:R running task stack:23992 pid:27891 tgid:27891 ppid:21304 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x17b4/0x5680 kernel/sched/core.c:7188
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7512
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
irqentry_exit+0x14f/0x730 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x221/0x350 kernel/locking/lockdep.c:5872
Code: ff ff ff e8 e1 94 06 0a f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 cb 5f 97 11 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 58 61 92
RSP: 0018:ffffc9000d98f0f8 EFLAGS: 00000282
RAX: c1c457d49c5b9500 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 000000000864a000 RSI: ffffffff8e21bc35 RDI: ffffffff8c28abe0
RBP: ffffffff8176e256 R08: ffffffff8176e256 R09: ffffffff8e95cd60
R10: ffffc9000d98f258 R11: ffffffff81b0d880 R12: 0000000000000002
R13: ffffffff8e95cd60 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
rcu_read_lock include/linux/rcupdate.h:838 [inline]
class_rcu_constructor include/linux/rcupdate.h:1181 [inline]
unwind_next_frame+0xc3/0x2550 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:253 [inline]
__kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2689 [inline]
slab_free mm/slub.c:6246 [inline]
kfree+0x1c5/0x640 mm/slub.c:6561
skb_kfree_head net/core/skbuff.c:1075 [inline]
skb_free_head net/core/skbuff.c:1087 [inline]
skb_release_data+0x828/0xa60 net/core/skbuff.c:1114
skb_release_all net/core/skbuff.c:1189 [inline]
__kfree_skb+0x5d/0x210 net/core/skbuff.c:1203
sctp_chunk_destroy net/sctp/sm_make_chunk.c:1495 [inline]
sctp_chunk_put+0x17d/0x200 net/sctp/sm_make_chunk.c:1522
sctp_datamsg_destroy net/sctp/chunk.c:-1 [inline]
sctp_datamsg_put+0x409/0x540 net/sctp/chunk.c:128
sctp_chunk_free+0x4a/0x60 net/sctp/sm_make_chunk.c:1507
__sctp_outq_teardown+0x7ab/0x9a0 net/sctp/outqueue.c:257
sctp_association_free+0x240/0x7f0 net/sctp/associola.c:340
sctp_cmd_delete_tcb net/sctp/sm_sideeffect.c:950 [inline]
sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1336 [inline]
sctp_side_effects net/sctp/sm_sideeffect.c:1204 [inline]
sctp_do_sm+0x3f6b/0x5cf0 net/sctp/sm_sideeffect.c:1175
sctp_primitive_SHUTDOWN+0x98/0xc0 net/sctp/primitive.c:89
sctp_close+0x407/0x940 net/sctp/socket.c:1529
inet_release+0x143/0x190 net/ipv4/af_inet.c:442
__sock_release net/socket.c:722 [inline]
sock_close+0xc3/0x240 net/socket.c:1514
__fput+0x44f/0xa60 fs/file_table.c:510
task_work_run+0x1d9/0x270 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
__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:238 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1e77f9cdd9
RSP: 002b:00007ffc18709018 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f1e78217da0 RCX: 00007f1e77f9cdd9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f1e78217da0 R08: 0000000000000006 R09: 0000000000000000
R10: 00007f1e78217cb0 R11: 0000000000000246 R12: 000000000013c668
R13: 00007f1e7821618c R14: 000000000013c4ed R15: 00007f1e78216180
rcu: rcu_preempt kthread starved for 8006 jiffies! g168753 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:27968 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x17b4/0x5680 kernel/sched/core.c:7188
__schedule_loop kernel/sched/core.c:7267 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7282
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: 1 UID: 0 PID: 3228 Comm: kworker/R-bat_e Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Workqueue: bat_events batadv_tt_purge
RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216
Code: 8b 3d e4 d3 60 0c 48 89 de 5b e9 43 ea 5f 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0d c8 53 73 11 65 8b 15 e9 53 73 11 81 e2 00 01 ff 00 74
RSP: 0018:ffffc90000a07fa8 EFLAGS: 00000202
RAX: ffffffff898393ca RBX: 0000000000000001 RCX: 0000000000000100
RDX: ffff8880332f3d80 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000a08098 R08: ffff8880332f3d80 R09: 0000000000000002
R10: 000000000000000a R11: 0000000000000100 R12: dffffc0000000000
R13: 1ffff92000141000 R14: ffff888099a82000 R15: ffff888039f36000
FS: 0000000000000000(0000) GS:ffff888125390000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd3705eb078 CR3: 0000000045c14000 CR4: 00000000003526f0
Call Trace:
lockdep_rtnl_is_held+0xa/0x40 net/core/rtnetlink.c:181
__in6_dev_get include/net/addrconf.h:348 [inline]
br_validate_ipv6+0xcb/0x890 net/bridge/br_netfilter_ipv6.c:47
br_nf_forward_ip+0x464/0xa30 net/bridge/br_netfilter_hooks.c:706
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook include/linux/netfilter.h:273 [inline]
NF_HOOK+0x23e/0x3f0 include/linux/netfilter.h:316
__br_forward+0x397/0x540 net/bridge/br_forward.c:115
deliver_clone net/bridge/br_forward.c:131 [inline]
maybe_deliver net/bridge/br_forward.c:191 [inline]
br_flood+0x6ee/0xb80 net/bridge/br_forward.c:238
br_handle_frame_finish+0x1521/0x1c80 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+0x91f/0xc30 net/bridge/br_netfilter_ipv6.c:-1
NF_HOOK include/linux/netfilter.h:318 [inline]
br_nf_pre_routing_ipv6+0x374/0x6f0 net/bridge/br_netfilter_ipv6.c:183
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:291 [inline]
br_handle_frame+0x1277/0x1510 net/bridge/br_input.c:442
__netif_receive_skb_core+0x98f/0x3170 net/core/dev.c:6089
__netif_receive_skb_one_core net/core/dev.c:6200 [inline]
__netif_receive_skb net/core/dev.c:6315 [inline]
process_backlog+0x76d/0x1950 net/core/dev.c:6666
__napi_poll+0xae/0x340 net/core/dev.c:7730
napi_poll net/core/dev.c:7793 [inline]
net_rx_action+0x627/0xf70 net/core/dev.c:7950
handle_softirqs+0x22a/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_global_purge net/batman-adv/translation-table.c:2255 [inline]
batadv_tt_purge+0x4d1/0x9e0 net/batman-adv/translation-table.c:3515
process_one_work kernel/workqueue.c:3302 [inline]
process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3385
rescuer_thread+0x827/0x1130 kernel/workqueue.c:3609
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: 11401 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:12:c6:fb:b1:49:40, vlan:1)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:1)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:12:c6:fb:b1:49:40, vlan:1)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:12:c6:fb:b1:49:40, vlan:1)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:12:c6:fb:b1:49:40, vlan:1)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:1)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:12:c6:fb:b1:49:40, vlan:1)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:12:c6:fb:b1:49:40, vlan:1)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:1)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:12:c6:fb:b1:49:40, vlan:1)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:12:c6:fb:b1:49:40, vlan:1)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:12:c6:fb:b1:49:40, vlan:1)