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 veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5228/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=340881, q=421 ncpus=1)
task:syz.1.12991 state:R running task stack:26008 pid:5228 tgid:5224 ppid:5827 task_flags:0x400040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x10e9/0x6820 kernel/sched/core.c:7188
preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7512
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:476 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
irqentry_exit+0x1fe/0x790 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__sanitizer_cov_trace_pc+0x5d/0x70 kernel/kcov.c:231
Code: 00 00 85 c0 74 f1 8b 82 a8 16 00 00 83 f8 02 75 e6 48 8b 8a b0 16 00 00 8b 92 ac 16 00 00 48 8b 01 48 83 c0 01 48 39 d0 73 cd <48> 89 01 48 89 34 c1 e9 17 95 8f 09 0f 1f 80 00 00 00 00 90 90 90
RSP: 0018:ffffc90004faf388 EFLAGS: 00000287
RAX: 0000000000073e9f RBX: ffffc90004faf420 RCX: ffffc9000f0b4000
RDX: 0000000000080000 RSI: ffffffff8b932bb4 RDI: ffff888033165c40
RBP: 0000000000000588 R08: 0000000000000006 R09: 0000000000000588
R10: 0000000000000589 R11: 0000000000000000 R12: 0000000000000589
R13: 0000000000000003 R14: ffffc90004faf420 R15: ffffc90004faf550
xas_find+0xc4/0x8e0 lib/xarray.c:1405
xa_find+0x24b/0x3d0 lib/xarray.c:2200
shmem_suitable_orders mm/shmem.c:1908 [inline]
shmem_alloc_and_add_folio+0x319/0xd40 mm/shmem.c:1955
shmem_get_folio_gfp+0xab1/0x1900 mm/shmem.c:2552
shmem_fault+0x1f9/0xa20 mm/shmem.c:2765
__do_fault+0x10b/0x440 mm/memory.c:5458
do_shared_fault mm/memory.c:5957 [inline]
do_fault+0x2db/0x1750 mm/memory.c:6031
do_pte_missing mm/memory.c:4550 [inline]
handle_pte_fault mm/memory.c:6411 [inline]
__handle_mm_fault+0x187d/0x2a00 mm/memory.c:6549
handle_mm_fault+0x36d/0xa20 mm/memory.c:6718
faultin_page mm/gup.c:1126 [inline]
__get_user_pages+0x1178/0x32a0 mm/gup.c:1428
__get_user_pages_locked mm/gup.c:1692 [inline]
faultin_page_range+0x1f1/0x9e0 mm/gup.c:1912
madvise_populate mm/madvise.c:969 [inline]
madvise_do_behavior+0x354/0x510 mm/madvise.c:1927
do_madvise+0x195/0x240 mm/madvise.c:2022
__do_sys_madvise mm/madvise.c:2031 [inline]
__se_sys_madvise mm/madvise.c:2029 [inline]
__x64_sys_madvise+0xa9/0x110 mm/madvise.c:2029
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4f7e19c819
RSP: 002b:00007f4f7f0a5028 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007f4f7e416090 RCX: 00007f4f7e19c819
RDX: 0000000000000017 RSI: ffffffffffff0005 RDI: 0000000000000000
RBP: 00007f4f7e232c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4f7e416128 R14: 00007f4f7e416090 R15: 00007ffd03b74218
rcu: rcu_preempt kthread starved for 4013 jiffies! g340881 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:28904 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x10e9/0x6820 kernel/sched/core.c:7188
__schedule_loop kernel/sched/core.c:7267 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7282
schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1a9/0x900 kernel/rcu/tree.c:2095
rcu_gp_kthread+0x179/0x230 kernel/rcu/tree.c:2297
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 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: 3412 Comm: kworker/R-bat_e Tainted: G U I L syzkaller #0 PREEMPT(full)
Tainted: [U]=USER, [I]=FIRMWARE_WORKAROUND, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: bat_events batadv_tt_purge
RIP: 0010:unwind_get_return_address+0x6e/0xa0 arch/x86/kernel/unwind_orc.c:385
Code: 89 ea 48 c1 ea 03 80 3c 02 00 75 36 48 8b 7b 48 e8 67 8a 18 00 85 c0 74 cf 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 <80> 3c 02 00 75 1c 48 8b 43 48 5b 5d e9 01 10 e0 09 e8 ac 5a bc 00
RSP: 0018:ffffc90000006f40 EFLAGS: 00000a02
RAX: dffffc0000000000 RBX: ffffc90000006f58 RCX: ffffc90000006eac
RDX: 1ffff92000000df4 RSI: ffffffff8df2a098 RDI: ffffffff81cf21ee
RBP: ffffc90000006fa0 R08: 0000000000000001 R09: 0000000000000007
R10: 0000000000000200 R11: 00000000000a643c R12: ffffffff81f32c90
R13: ffffc90000007018 R14: 0000000000000000 R15: ffff88803406dc40
FS: 0000000000000000(0000) GS:ffff8881242f6000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000170000 CR3: 00000000590dc000 CR4: 00000000003526f0
Call Trace:
arch_stack_walk+0xa6/0xf0 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x30/0x50 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:4569 [inline]
slab_alloc_node mm/slub.c:4898 [inline]
kmem_cache_alloc_noprof+0x241/0x6e0 mm/slub.c:4905
skb_clone+0x190/0x400 net/core/skbuff.c:2107
deliver_clone net/bridge/br_forward.c:125 [inline]
maybe_deliver+0xd4/0x180 net/bridge/br_forward.c:191
br_flood+0x193/0x650 net/bridge/br_forward.c:238
br_handle_frame_finish+0xff4/0x1f60 net/bridge/br_input.c:229
br_nf_hook_thresh+0x30d/0x420 net/bridge/br_netfilter_hooks.c:1161
br_nf_pre_routing_finish_ipv6+0x659/0xdd0 net/bridge/br_netfilter_ipv6.c:153
NF_HOOK include/linux/netfilter.h:318 [inline]
br_nf_pre_routing_ipv6+0x39c/0x8b0 net/bridge/br_netfilter_ipv6.c:183
br_nf_pre_routing+0x90f/0x1560 net/bridge/br_netfilter_hooks.c:509
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:291 [inline]
br_handle_frame+0xcdd/0x1520 net/bridge/br_input.c:442
__netif_receive_skb_core.constprop.0+0x6c5/0x3530 net/core/dev.c:6096
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6207
__netif_receive_skb+0x1f/0x120 net/core/dev.c:6322
process_backlog+0x37a/0x1580 net/core/dev.c:6673
__napi_poll.constprop.0+0xaf/0x450 net/core/dev.c:7737
napi_poll net/core/dev.c:7800 [inline]
net_rx_action+0xa40/0xf20 net/core/dev.c:7957
handle_softirqs+0x1ea/0xa00 kernel/softirq.c:622
do_softirq kernel/softirq.c:523 [inline]
do_softirq+0xac/0xe0 kernel/softirq.c:510
__local_bh_enable_ip+0xf8/0x120 kernel/softirq.c:450
spin_unlock_bh include/linux/spinlock.h:396 [inline]
batadv_tt_local_purge+0x21c/0x3d0 net/batman-adv/translation-table.c:1320
batadv_tt_purge+0x8b/0xbd0 net/batman-adv/translation-table.c:3514
process_one_work+0xa0e/0x1980 kernel/workqueue.c:3302
process_scheduled_works kernel/workqueue.c:3385 [inline]
rescuer_thread+0x905/0x14a0 kernel/workqueue.c:3609
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
net_ratelimit: 5404 callbacks suppressed
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 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:0c, 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:0c, 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:0c, 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:0c, 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: 7319 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:0c, 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:0c, 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:0c, 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:0c, 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:0c, vlan:0)