bridge0: received packet on veth0_to_bridge with own address as source address (addr:26:dd:31:ab:56:f6, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5212/1:b..l P5837/1:b..l P5201/1:b..l P47/2:b..l
rcu: 	(detected by 1, t=10503 jiffies, g=20857, q=473 ncpus=2)
task:kworker/1:1     state:R  running task     stack:23888 pid:47    tgid:47    ppid:2      task_flags:0x4208060 flags:0x00004000
Workqueue: events_power_efficient gc_worker
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x1b88/0x5240 kernel/sched/core.c:6767
 preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6947
 preempt_schedule+0xe4/0xf0 kernel/sched/core.c:6971
 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
 __local_bh_enable_ip+0x179/0x200 kernel/softirq.c:414
 nf_conntrack_free+0x1fc/0x390 net/netfilter/nf_conntrack_core.c:1724
 nf_ct_put include/net/netfilter/nf_conntrack.h:186 [inline]
 nf_ct_gc_expired+0x282/0x4b0 net/netfilter/nf_conntrack_core.c:726
 gc_worker+0x518/0x1420 net/netfilter/nf_conntrack_core.c:1562
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319
 worker_thread+0x870/0xd50 kernel/workqueue.c:3400
 kthread+0x7b7/0x940 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
task:klogd           state:R  running task     stack:23624 pid:5201  tgid:5201  ppid:1      task_flags:0x400100 flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x1b88/0x5240 kernel/sched/core.c:6767
 preempt_schedule_irq+0xfe/0x1c0 kernel/sched/core.c:7090
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x167/0x2f0 arch/x86/include/asm/irqflags.h:-1
Code: c7 44 24 10 00 00 00 00 9c 8f 44 24 10 f7 44 24 10 00 02 00 00 0f 85 fd 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 65 48 8b 45 00 <48> 3b 44 24 38 0f 85 72 01 00 00 48 83 c4 40 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc900037cf108 EFLAGS: 00000206
RAX: 098882612fa0db00 RBX: ffffffff8ed3dfe0 RCX: 098882612fa0db00
RDX: 0000000000000000 RSI: ffffffff8e4fd5a1 RDI: ffffffff8ca1b6a0
RBP: ffffffff9368a020 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000002 R14: 0000000000000246 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 rcu_read_lock include/linux/rcupdate.h:841 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
 unwind_next_frame+0xd5/0x23b0 arch/x86/kernel/unwind_orc.c:479
 arch_stack_walk+0x11e/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x11a/0x1d0 kernel/stacktrace.c:122
 save_stack+0xfc/0x1f0 mm/page_owner.c:156
 __reset_page_owner+0x76/0x1e0 mm/page_owner.c:308
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1262 [inline]
 __free_frozen_pages+0xde8/0x10a0 mm/page_alloc.c:2680
 __slab_free+0x2c6/0x390 mm/slub.c:4557
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4151 [inline]
 slab_alloc_node mm/slub.c:4200 [inline]
 kmem_cache_alloc_node_noprof+0x1f2/0x3b0 mm/slub.c:4252
 __alloc_skb+0x1c2/0x480 net/core/skbuff.c:658
 alloc_skb include/linux/skbuff.h:1340 [inline]
 alloc_skb_with_frags+0xc3/0x830 net/core/skbuff.c:6639
 sock_alloc_send_pskb+0x91c/0xa70 net/core/sock.c:2954
 unix_dgram_sendmsg+0x6d4/0x1ea0 net/unix/af_unix.c:2007
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:727
 __sys_sendto+0x365/0x4c0 net/socket.c:2180
 __do_sys_sendto net/socket.c:2187 [inline]
 __se_sys_sendto net/socket.c:2183 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2183
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f31adb389b5
RSP: 002b:00007ffcafd47ae8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f31adb389b5
RDX: 00000000000000a1 RSI: 0000557c6e363d10 RDI: 0000000000000003
RBP: 0000557c6e35d910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000013
R13: 00007f31adcc6212 R14: 00007ffcafd47be8 R15: 0000000000000000
 </TASK>
task:syz-executor    state:R  running task     stack:23624 pid:5837  tgid:5837  ppid:5828   task_flags:0x40050c flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x1b88/0x5240 kernel/sched/core.c:6767
 preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6947
 preempt_schedule+0xe4/0xf0 kernel/sched/core.c:6971
 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
 __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 zap_pte_range mm/memory.c:1761 [inline]
 zap_pmd_range mm/memory.c:1823 [inline]
 zap_pud_range mm/memory.c:1852 [inline]
 zap_p4d_range mm/memory.c:1873 [inline]
 unmap_page_range+0x39c5/0x44d0 mm/memory.c:1894
 unmap_vmas+0x3ce/0x5f0 mm/memory.c:1984
 exit_mmap+0x2bc/0xde0 mm/mmap.c:1284
 __mmput+0x115/0x420 kernel/fork.c:1379
 exit_mm+0x221/0x310 kernel/exit.c:589
 do_exit+0x994/0x27f0 kernel/exit.c:940
 do_group_exit+0x207/0x2c0 kernel/exit.c:1102
 get_signal+0x1696/0x1730 kernel/signal.c:3034
 arch_do_signal_or_restart+0x98/0x840 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xce/0x340 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcc075833d7
RSP: 002b:00007fffcb62be50 EFLAGS: 00000293 ORIG_RAX: 000000000000003d
RAX: fffffffffffffe00 RBX: 00000000000016e1 RCX: 00007fcc075833d7
RDX: 0000000040000000 RSI: 00007fffcb62be8c RDI: 00000000ffffffff
RBP: 00007fffcb62be8c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000008
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000
 </TASK>
task:udevd           state:R  running task     stack:22600 pid:5212  tgid:5212  ppid:1      task_flags:0x400140 flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x1b88/0x5240 kernel/sched/core.c:6767
 preempt_schedule_irq+0xfe/0x1c0 kernel/sched/core.c:7090
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_release+0x244/0x3e0 arch/x86/include/asm/irqflags.h:-1
Code: 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 0f 85 c3 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 65 48 8b 03 <48> 3b 44 24 28 0f 85 82 01 00 00 48 83 c4 30 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc90003317620 EFLAGS: 00000206
RAX: 2be428a6aa603b00 RBX: ffffffff9368a020 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8e4fd5a1 RDI: ffffffff8ca1b6a0
RBP: ffff88807d51a918 R08: ffffc90003317a40 R09: 0000000000000000
R10: ffffc900033177b0 R11: fffff52000662ef8 R12: 0000000000000001
R13: ffff88807d519e00 R14: 0000000000000206 R15: ffffffff8ed3dfe0
 rcu_lock_release include/linux/rcupdate.h:341 [inline]
 rcu_read_unlock include/linux/rcupdate.h:871 [inline]
 class_rcu_destructor include/linux/rcupdate.h:1155 [inline]
 unwind_next_frame+0x1a9f/0x23b0 arch/x86/kernel/unwind_orc.c:680
 arch_stack_walk+0x11e/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x11a/0x1d0 kernel/stacktrace.c:122
 save_stack+0xfc/0x1f0 mm/page_owner.c:156
 __reset_page_owner+0x76/0x1e0 mm/page_owner.c:308
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1262 [inline]
 __free_frozen_pages+0xde8/0x10a0 mm/page_alloc.c:2680
 discard_slab mm/slub.c:2720 [inline]
 __put_partials+0x160/0x1c0 mm/slub.c:3189
 put_cpu_partial+0x17e/0x250 mm/slub.c:3264
 __slab_free+0x294/0x390 mm/slub.c:4516
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4151 [inline]
 slab_alloc_node mm/slub.c:4200 [inline]
 kmem_cache_alloc_noprof+0x1e1/0x390 mm/slub.c:4207
 getname_flags+0xb6/0x530 fs/namei.c:146
 getname include/linux/fs.h:2852 [inline]
 do_sys_openat2+0xbf/0x1d0 fs/open.c:1423
 do_sys_open fs/open.c:1444 [inline]
 __do_sys_openat fs/open.c:1460 [inline]
 __se_sys_openat fs/open.c:1455 [inline]
 __x64_sys_openat+0x249/0x2a0 fs/open.c:1455
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f03cdb1a477
RSP: 002b:00007ffdbe474bc8 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00005555e1e6bd30 RCX: 00007f03cdb1a477
RDX: 0000000000090800 RSI: 00005555e1e6f8c0 RDI: 00000000ffffff9c
RBP: 00005555e1efc780 R08: 0000000000090800 R09: 00005555e1e6f8c0
R10: 0000000000000000 R11: 0000000000000287 R12: 00005555e1e6f8c0
R13: 00000000000000fd R14: 00005555c326b1c4 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 9575 jiffies! g20857 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:26952 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x1b88/0x5240 kernel/sched/core.c:6767
 __schedule_loop kernel/sched/core.c:6845 [inline]
 schedule+0x163/0x360 kernel/sched/core.c:6860
 schedule_timeout+0x15b/0x2b0 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2e1/0x1340 kernel/rcu/tree.c:2046
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2248
 kthread+0x7b7/0x940 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.15.0-rc1-syzkaller-00139-gab59a8605604 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x3a/0xb0 kernel/rcu/tree.c:736
Code: e8 3b 0a 88 0a 89 c3 83 f8 08 73 7a 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd 10 7c 79 8e 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 <74> 08 4c 89 f7 e8 2c c8 84 00 48 c7 c3 58 cb 69 93 49 03 1e 48 89
RSP: 0018:ffffc90000a07168 EFLAGS: 00000246
RAX: 1ffffffff1cf2f83 RBX: 0000000000000001 RCX: ffff88801d6f5a00
RDX: 0000000000000000 RSI: ffffffff8ca1b680 RDI: ffffffff8ca1b640
RBP: ffffc90000a07298 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90000a07260
R13: dffffc0000000000 R14: ffffffff8e797c18 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888125096000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558334e5a8 CR3: 000000005d6a4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rcu_read_lock include/linux/rcupdate.h:842 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
 unwind_next_frame+0xe7/0x23b0 arch/x86/kernel/unwind_orc.c:479
 arch_stack_walk+0x11e/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x11a/0x1d0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2389 [inline]
 slab_free mm/slub.c:4646 [inline]
 kmem_cache_free+0x197/0x410 mm/slub.c:4748
 br_nf_dev_queue_xmit+0x4cb/0x2560 net/bridge/br_netfilter_hooks.c:-1
 NF_HOOK+0x6bf/0x780 include/linux/netfilter.h:314
 br_nf_post_routing+0xa28/0xe80 net/bridge/br_netfilter_hooks.c:969
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_slow+0xc8/0x220 net/netfilter/core.c:626
 nf_hook include/linux/netfilter.h:269 [inline]
 NF_HOOK+0x2ac/0x460 include/linux/netfilter.h:312
 br_forward_finish+0xd8/0x130 net/bridge/br_forward.c:66
 br_nf_hook_thresh net/bridge/br_netfilter_hooks.c:-1 [inline]
 br_nf_forward_finish+0xb50/0xfb0 net/bridge/br_netfilter_hooks.c:665
 NF_HOOK+0x6bf/0x780 include/linux/netfilter.h:314
 br_nf_forward_ip+0x61e/0x7b0 net/bridge/br_netfilter_hooks.c:719
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_slow+0xc8/0x220 net/netfilter/core.c:626
 nf_hook include/linux/netfilter.h:269 [inline]
 NF_HOOK+0x2ac/0x460 include/linux/netfilter.h:312
 __br_forward+0x46a/0x640 net/bridge/br_forward.c:115
 br_handle_frame_finish+0x185b/0x1f60 net/bridge/br_input.c:220
 br_nf_hook_thresh+0x482/0x5a0 net/bridge/br_netfilter_hooks.c:1170
 br_nf_pre_routing_finish_ipv6+0xaa3/0xdd0 net/bridge/br_netfilter_ipv6.c:-1
 NF_HOOK include/linux/netfilter.h:314 [inline]
 br_nf_pre_routing_ipv6+0x397/0x790 net/bridge/br_netfilter_ipv6.c:184
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_bridge_pre net/bridge/br_input.c:282 [inline]
 br_handle_frame+0x9fa/0x1530 net/bridge/br_input.c:433
 __netif_receive_skb_core+0x155a/0x4bb0 net/core/dev.c:5771
 __netif_receive_skb_one_core net/core/dev.c:5883 [inline]
 __netif_receive_skb+0x130/0x670 net/core/dev.c:5998
 process_backlog+0x664/0x15c0 net/core/dev.c:6350
 __napi_poll+0xcb/0x480 net/core/dev.c:7322
 napi_poll net/core/dev.c:7386 [inline]
 net_rx_action+0x89d/0x1240 net/core/dev.c:7508
 handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xfb/0x220 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:81
Code: cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 13 71 17 00 f3 0f 1e fa fb f4 <c3> cc cc cc cc 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000197dc0 EFLAGS: 000002c6
RAX: 0fbc11da991bc000 RBX: ffffffff8197bf7e RCX: ffffffff8c30c95c
RDX: 0000000000000001 RSI: ffffffff8e69c726 RDI: ffffffff8ca1b6a0
RBP: ffffc90000197f20 R08: ffff8880b8732b5b R09: 1ffff110170e656b
R10: dffffc0000000000 R11: ffffed10170e656c R12: 1ffff92000032fd2
R13: 1ffff11003adeb40 R14: 0000000000000001 R15: dffffc0000000000
 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
 default_idle+0x13/0x20 arch/x86/kernel/process.c:748
 default_idle_call+0x74/0xb0 kernel/sched/idle.c:117
 cpuidle_idle_call kernel/sched/idle.c:185 [inline]
 do_idle+0x22e/0x5d0 kernel/sched/idle.c:325
 cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:423
 start_secondary+0xfe/0x100 arch/x86/kernel/smpboot.c:315
 common_startup_64+0x13e/0x147
 </TASK>
bridge0: received packet on veth0_to_bridge with own address as source address (addr:26:dd:31:ab:56:f6, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:26:dd:31:ab:56:f6, 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 veth0_to_bridge with own address as source address (addr:26:dd:31:ab:56:f6, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:26:dd:31:ab:56:f6, vlan:0)