bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:28:3d:03:82:29, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:28:3d:03:82:29, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P16419/1:b..l P5835/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=64053, q=1076 ncpus=1)
task:syz-executor state:R running task stack:23416 pid:5835 tgid:5835 ppid:5828 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x1139/0x6150 kernel/sched/core.c:6863
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7190
irqentry_exit+0x1d8/0x8c0 kernel/entry/common.c:216
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_release+0x183/0x2d0 kernel/locking/lockdep.c:5893
Code: 0f c1 05 a8 36 19 12 83 f8 01 0f 85 03 01 00 00 9c 58 f6 c4 02 0f 85 ee 00 00 00 41 f7 c5 00 02 00 00 74 01 fb 48 8b 44 24 10 <65> 48 2b 05 3d ef 18 12 0f 85 32 01 00 00 48 83 c4 18 5b 41 5c 41
RSP: 0018:ffffc90003ea7458 EFLAGS: 00000206
RAX: 953ef3b4b8f85000 RBX: ffffffff8e3c9520 RCX: ffffc90003ea7464
RDX: 0000000000000004 RSI: ffffffff8daa50c6 RDI: ffffffff8bf2b680
RBP: 0000000000000001 R08: ffffffff91264246 R09: 00000000530eb4f6
R10: 0000000000000002 R11: 000000000000a8ed R12: ffffffff816c7a34
R13: 0000000000000206 R14: ffff888034280000 R15: 0000000000000005
rcu_lock_release include/linux/rcupdate.h:341 [inline]
rcu_read_unlock include/linux/rcupdate.h:897 [inline]
class_rcu_destructor include/linux/rcupdate.h:1195 [inline]
unwind_next_frame+0x3f9/0x20b0 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
save_stack+0x160/0x1f0 mm/page_owner.c:165
__reset_page_owner+0x84/0x1a0 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+0x7df/0x1170 mm/page_alloc.c:2943
discard_slab mm/slub.c:3346 [inline]
__put_partials+0x130/0x170 mm/slub.c:3886
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4c/0xf0 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:350
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4953 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
kmem_cache_alloc_noprof+0x25e/0x770 mm/slub.c:5270
vm_area_dup+0x27/0x8d0 mm/vma_init.c:123
dup_mmap+0x6a4/0x20e0 mm/mmap.c:1773
dup_mm kernel/fork.c:1529 [inline]
copy_mm kernel/fork.c:1581 [inline]
copy_process+0x3b9f/0x7430 kernel/fork.c:2221
kernel_clone+0xfc/0x910 kernel/fork.c:2651
__do_sys_clone+0xce/0x120 kernel/fork.c:2792
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa02b585f13
RSP: 002b:00007fff45768048 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa02b585f13
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 00005555610337d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000927c0 R14: 0000000000057615 R15: 00007fff457681e0
task:syz.1.4769 state:R running task stack:23144 pid:16419 tgid:16419 ppid:5834 task_flags:0x40064c flags:0x00080001
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x1139/0x6150 kernel/sched/core.c:6863
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7190
irqentry_exit+0x1d8/0x8c0 kernel/entry/common.c:216
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x62/0x330 kernel/locking/lockdep.c:5872
Code: ea 18 12 83 f8 07 0f 87 a2 02 00 00 89 c0 48 0f a3 05 d2 6b ef 0e 0f 82 74 02 00 00 8b 35 4a 9c ef 0e 85 f6 0f 85 8d 00 00 00 <48> 8b 44 24 30 65 48 2b 05 e9 e9 18 12 0f 85 ad 02 00 00 48 83 c4
RSP: 0018:ffffc9000bc3eec0 EFLAGS: 00000206
RAX: 0000000000000046 RBX: ffffffff8e3c9520 RCX: 0000000068c1bacb
RDX: 0000000000000000 RSI: ffffffff8daa50c6 RDI: ffffffff8bf2b680
RBP: 0000000000000002 R08: 00000000ffffffff R09: 00000000ffffffff
R10: 0000000000000002 R11: ffff88802ba2e6b0 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:867 [inline]
class_rcu_constructor include/linux/rcupdate.h:1195 [inline]
unwind_next_frame+0xd1/0x20b0 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
save_stack+0x160/0x1f0 mm/page_owner.c:165
__reset_page_owner+0x84/0x1a0 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_unref_folios+0xa22/0x1610 mm/page_alloc.c:3000
folios_put_refs+0x4be/0x750 mm/swap.c:1002
folio_batch_release include/linux/pagevec.h:101 [inline]
shmem_undo_range+0x58f/0x1140 mm/shmem.c:1137
shmem_truncate_range mm/shmem.c:1249 [inline]
shmem_evict_inode+0x39e/0xbe0 mm/shmem.c:1379
evict+0x3c2/0xad0 fs/inode.c:837
iput_final fs/inode.c:1954 [inline]
iput.part.0+0x621/0x1190 fs/inode.c:2006
iput+0x35/0x40 fs/inode.c:1969
dentry_unlink_inode+0x29c/0x480 fs/dcache.c:467
__dentry_kill+0x1d0/0x600 fs/dcache.c:670
finish_dput+0x76/0x480 fs/dcache.c:879
dput.part.0+0x451/0x570 fs/dcache.c:928
dput+0x1f/0x30 fs/dcache.c:920
__fput+0x51c/0xb70 fs/file_table.c:476
task_work_run+0x150/0x240 kernel/task_work.c:233
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x87f/0x2bd0 kernel/exit.c:971
do_group_exit+0xd3/0x2a0 kernel/exit.c:1112
get_signal+0x2671/0x26d0 kernel/signal.c:3034
arch_do_signal_or_restart+0x8f/0x7a0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
exit_to_user_mode_loop kernel/entry/common.c:75 [inline]
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:270 [inline]
irqentry_exit_to_user_mode include/linux/irq-entry-common.h:339 [inline]
irqentry_exit+0x38a/0x8c0 kernel/entry/common.c:196
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f816f18f7d1
RSP: 002b:0000000000005feb EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f816f3e5fa0 RCX: 00007f816f18f7c9
RDX: 0000000000000000 RSI: 0000000000005feb RDI: 0000000000000002
RBP: 00007f816f213f91 R08: 0002000000000003 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f816f3e6038 R14: 00007f816f3e5fa0 R15: 00007ffe587722b8
rcu: rcu_preempt kthread starved for 1825 jiffies! g64053 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:28440 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x1139/0x6150 kernel/sched/core.c:6863
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6960
schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1ea/0xaf0 kernel/rcu/tree.c:2083
rcu_gp_kthread+0x26d/0x380 kernel/rcu/tree.c:2285
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 3408 Comm: kworker/R-bat_e Tainted: G U L syzkaller #0 PREEMPT(full)
Tainted: [U]=USER, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: bat_events batadv_tt_purge
RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:81 [inline]
RIP: 0010:__orc_find+0x68/0xf0 arch/x86/kernel/unwind_orc.c:103
Code: 8d 6b 04 49 89 df 49 39 ec 72 4e 4c 89 e2 48 29 ea 48 89 d6 48 c1 ea 3f 48 c1 fe 02 48 01 f2 48 d1 fa 48 8d 5c 95 00 48 89 da <48> c1 ea 03 0f b6 34 0a 48 89 da 83 e2 07 83 c2 03 40 38 f2 7c 05
RSP: 0018:ffffc90000006d88 EFLAGS: 00000203
RAX: ffffffff911b79dc RBX: ffffffff909a2d10 RCX: dffffc0000000000
RDX: ffffffff909a2d10 RSI: 000000000000000f RDI: ffffffff909a2cb4
RBP: ffffffff909a2cf4 R08: ffffffff911b7a9c R09: 000000000ac0d5af
R10: 0000000000000002 R11: 0000000000002b91 R12: ffffffff909a2d30
R13: ffffffff812b91c9 R14: ffffffff909a2cb4 R15: ffffffff909a2cf0
FS: 0000000000000000(0000) GS:ffff8881248f9000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fed98600218 CR3: 0000000022b68000 CR4: 00000000003526f0
Call Trace:
orc_find arch/x86/kernel/unwind_orc.c:238 [inline]
unwind_next_frame+0x2ec/0x20b0 arch/x86/kernel/unwind_orc.c:510
arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
unpoison_slab_object mm/kasan/common.c:340 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:366
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4953 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
kmem_cache_alloc_node_noprof+0x298/0x800 mm/slub.c:5315
kmalloc_reserve+0x18b/0x2c0 net/core/skbuff.c:586
__alloc_skb+0x186/0x410 net/core/skbuff.c:690
alloc_skb include/linux/skbuff.h:1383 [inline]
nlmsg_new include/net/netlink.h:1055 [inline]
fdb_notify+0xa4/0x1a0 net/bridge/br_fdb.c:188
br_fdb_update+0x323/0x7c0 net/bridge/br_fdb.c:1036
br_handle_frame_finish+0xdf1/0x1f00 net/bridge/br_input.c:144
br_nf_hook_thresh+0x307/0x410 net/bridge/br_netfilter_hooks.c:1167
br_nf_pre_routing_finish_ipv6+0x76a/0xfc0 net/bridge/br_netfilter_ipv6.c:154
NF_HOOK include/linux/netfilter.h:318 [inline]
br_nf_pre_routing_ipv6+0x3cd/0x8c0 net/bridge/br_netfilter_ipv6.c:184
br_nf_pre_routing+0x860/0x15b0 net/bridge/br_netfilter_hooks.c:508
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:291 [inline]
br_handle_frame+0xb28/0x14e0 net/bridge/br_input.c:442
__netif_receive_skb_core.constprop.0+0x6b3/0x35b0 net/core/dev.c:6026
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6137
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6252
process_backlog+0x4a2/0x1650 net/core/dev.c:6604
__napi_poll.constprop.0+0xb3/0x540 net/core/dev.c:7668
napi_poll net/core/dev.c:7731 [inline]
net_rx_action+0x9f9/0xfa0 net/core/dev.c:7883
handle_softirqs+0x219/0x950 kernel/softirq.c:622
do_softirq kernel/softirq.c:523 [inline]
do_softirq+0xb2/0xf0 kernel/softirq.c:510
__local_bh_enable_ip+0x100/0x120 kernel/softirq.c:450
spin_unlock_bh include/linux/spinlock.h:396 [inline]
batadv_tt_global_purge net/batman-adv/translation-table.c:2250 [inline]
batadv_tt_purge+0x25f/0xb80 net/batman-adv/translation-table.c:3510
process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257
process_scheduled_works kernel/workqueue.c:3340 [inline]
rescuer_thread+0x8c5/0xf10 kernel/workqueue.c:3528
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
net_ratelimit: 2315 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:28:3d:03:82:29, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:28:3d:03:82:29, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:28:3d:03:82:29, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:28:3d:03:82:29, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:28:3d:03:82:29, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:28:3d:03:82:29, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:28:3d:03:82:29, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:28:3d:03:82:29, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:28:3d:03:82:29, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:28:3d:03:82:29, vlan:0)
net_ratelimit: 2687 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:28:3d:03:82:29, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:28:3d:03:82:29, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:28:3d:03:82:29, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:28:3d:03:82:29, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:28:3d:03:82:29, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:28:3d:03:82:29, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:28:3d:03:82:29, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:28:3d:03:82:29, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:28:3d:03:82:29, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:28:3d:03:82:29, vlan:0)