bridge0: received packet on veth1_to_bridge with own address as source address (addr:7a:63:0f:23:4c:32, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P2/1:b..l P24391/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=154185, q=1184 ncpus=2)
task:syz-executor state:R running task stack:24392 pid:24391 tgid:24391 ppid:5597 task_flags:0x40050c flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x17d4/0x5630 kernel/sched/core.c:7239
preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7418
preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:201 [inline]
_raw_spin_unlock+0x41/0x50 kernel/locking/spinlock.c:213
spin_unlock include/linux/spinlock.h:401 [inline]
zap_pte_range mm/memory.c:1964 [inline]
zap_pmd_range mm/memory.c:2020 [inline]
zap_pud_range mm/memory.c:2048 [inline]
zap_p4d_range mm/memory.c:2069 [inline]
__zap_vma_range+0x4082/0x4f20 mm/memory.c:2109
unmap_vmas+0x390/0x550 mm/memory.c:2178
exit_mmap+0x293/0x9f0 mm/mmap.c:1300
__mmput+0x118/0x420 kernel/fork.c:1193
exit_mm+0x221/0x2d0 kernel/exit.c:615
do_exit+0x6cd/0x2360 kernel/exit.c:997
do_group_exit+0x22d/0x2f0 kernel/exit.c:1152
get_signal+0x121b/0x12c0 kernel/signal.c:3046
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+0x10e/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+0x328/0x520 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f24c2159257
RSP: 002b:00007ffc639a36b0 EFLAGS: 00000202 ORIG_RAX: 000000000000003d
RAX: fffffffffffffe00 RBX: 000055557c9d4500 RCX: 00007f24c2159257
RDX: 0000000040000000 RSI: 00007ffc639a370c RDI: ffffffffffffffff
RBP: 00007ffc639a370c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000008
R13: 0000000000000003 R14: 00007ffc639a3968 R15: 0000000000000000
task:kthreadd state:R running task stack:26000 pid:2 tgid:2 ppid:0 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x17d4/0x5630 kernel/sched/core.c:7239
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7561
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:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:114 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:128 [inline]
RIP: 0010:lock_acquire+0xc0/0x350 kernel/locking/lockdep.c:5882
Code: cd 11 85 c0 0f 85 bf 00 00 00 65 48 8b 05 a0 50 cd 11 83 b8 a4 0b 00 00 00 0f 85 aa 00 00 00 4c 89 74 24 10 4d 89 fe 9c 41 5f 48 c7 c7 b6 2d 27 8e e8 33 63 36 0a 65 ff 05 24 95 cd 11 45 31
RSP: 0018:ffffc90000077240 EFLAGS: 00000246
RAX: ffff88801daebe80 RBX: 0000000000000000 RCX: 8000000000000001
RDX: 0000000000000000 RSI: ffffffff8177712c RDI: 1ffffffff1d6b43c
RBP: ffffffff8177710f R08: 0000000000000000 R09: 0000000000000000
R10: ffffc900000773d8 R11: ffffffff81b1e750 R12: 0000000000000002
R13: ffffffff8eb5a1e0 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
rcu_read_lock include/linux/rcupdate.h:840 [inline]
class_rcu_constructor include/linux/rcupdate.h:1183 [inline]
unwind_next_frame+0xac/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
save_stack+0x122/0x230 mm/page_owner.c:165
__reset_page_owner+0x71/0x1f0 mm/page_owner.c:320
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0xc22/0xd20 mm/page_alloc.c:2950
__slab_free+0x274/0x2c0 mm/slub.c:5741
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4584 [inline]
slab_alloc_node mm/slub.c:4917 [inline]
__do_kmalloc_node mm/slub.c:5333 [inline]
__kmalloc_noprof+0x315/0x720 mm/slub.c:5359
_kmalloc_noprof include/linux/slab.h:992 [inline]
_kzalloc_noprof include/linux/slab.h:1309 [inline]
lsm_blob_alloc security/security.c:218 [inline]
lsm_cred_alloc security/security.c:235 [inline]
security_prepare_creds+0x52/0x360 security/security.c:2866
prepare_creds+0x57d/0x820 kernel/cred.c:215
copy_creds+0x109/0x9f0 kernel/cred.c:286
copy_process+0xd1f/0x43e0 kernel/fork.c:2177
kernel_clone+0x2d7/0x940 kernel/fork.c:2772
kernel_thread+0x13f/0x1b0 kernel/fork.c:2833
create_kthread kernel/kthread.c:459 [inline]
kthreadd+0x4ec/0x6e0 kernel/kthread.c:817
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: rcu_preempt kthread starved for 10464 jiffies! g154185 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x17d4/0x5630 kernel/sched/core.c:7239
__schedule_loop kernel/sched/core.c:7316 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7331
schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x30c/0x11f0 kernel/rcu/tree.c:2123
rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2325
kthread+0x38b/0x480 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: 3223 Comm: kworker/R-bat_e Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: bat_events batadv_tt_purge
RIP: 0010:is_kfence_address include/linux/kfence.h:58 [inline]
RIP: 0010:kfence_free include/linux/kfence.h:185 [inline]
RIP: 0010:slab_free_hook mm/slub.c:2615 [inline]
RIP: 0010:slab_free mm/slub.c:6377 [inline]
RIP: 0010:kmem_cache_free+0x104/0x650 mm/slub.c:6504
Code: 00 45 31 ed 8b 6b 08 8b 73 1c 4c 89 e7 e8 d4 20 78 ff f6 43 09 08 75 0b 8b 73 1c 4c 89 e7 e8 43 e2 b6 02 48 8b 05 cc d6 2d 0e <4c> 89 e1 48 29 c1 48 81 f9 00 00 20 00 0f 93 c1 48 85 c0 0f 94 c0
RSP: 0018:ffffc90000007230 EFLAGS: 00000282
RAX: ffff88823be00000 RBX: ffff88801f6c18c0 RCX: ffffffff9a792501
RDX: 0000000000000001 RSI: ffffffff8e258909 RDI: 00000000ffffffff
RBP: 0000000000a12110 R08: ffffffff90589437 R09: 1ffffffff20b1286
R10: dffffc0000000000 R11: fffffbfff20b1287 R12: ffff88809db658c0
R13: 0000000000000000 R14: ffffea000276d940 R15: ffffffff89e7aaad
FS: 0000000000000000(0000) GS:ffff888124f21000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc4338bbe0 CR3: 000000007b240000 CR4: 00000000003526f0
Call Trace:
netlink_broadcast_filtered+0xd9d/0xea0 net/netlink/af_netlink.c:1541
nlmsg_multicast_filtered include/net/netlink.h:1165 [inline]
nlmsg_multicast include/net/netlink.h:1184 [inline]
nlmsg_notify+0xe3/0x1a0 net/netlink/af_netlink.c:2599
br_fdb_update+0x4e6/0x6c0 net/bridge/br_fdb.c:1024
br_handle_frame_finish+0x600/0x1950 net/bridge/br_input.c:144
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+0x989/0x30c0 net/core/dev.c:6151
__netif_receive_skb_one_core net/core/dev.c:6262 [inline]
__netif_receive_skb net/core/dev.c:6377 [inline]
process_backlog+0x727/0x18b0 net/core/dev.c:6728
__napi_poll+0xaa/0x330 net/core/dev.c:7787
napi_poll net/core/dev.c:7850 [inline]
net_rx_action+0x61d/0xf50 net/core/dev.c:8007
handle_softirqs+0x226/0x860 kernel/softirq.c:645
do_softirq+0x77/0xd0 kernel/softirq.c:546
__local_bh_enable_ip+0x100/0x140 kernel/softirq.c:473
spin_unlock_bh include/linux/spinlock.h:407 [inline]
batadv_tt_local_purge+0x2c1/0x340 net/batman-adv/translation-table.c:1402
batadv_tt_purge+0x35/0xa10 net/batman-adv/translation-table.c:3753
process_one_work kernel/workqueue.c:3322 [inline]
process_scheduled_works+0xa88/0x14c0 kernel/workqueue.c:3405
rescuer_thread+0x7b6/0x10b0 kernel/workqueue.c:3629
kthread+0x38b/0x480 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
bridge0: received packet on veth1_to_bridge with own address as source address (addr:7a:63:0f:23:4c:32, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:7a:63:0f:23:4c:32, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:7a:63:0f:23:4c:32, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:7a:63:0f:23:4c:32, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:7a:63:0f:23:4c:32, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:7a:63:0f:23:4c:32, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:7a:63:0f:23:4c:32, vlan:0)