bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6240/1:b..l P4980/1:b..l P5659/1:b..l P6031/1:b..l P6234/1:b..l rcu: (detected by 1, t=10780 jiffies, g=20461, q=1174 ncpus=2) task:syz.0.124 state:R running task stack:25296 pid:6234 tgid:6234 ppid:5678 task_flags:0x40044c flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5533 [inline] __schedule+0x17db/0x58f0 kernel/sched/core.c:7284 preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7463 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:2095 [inline] zap_pmd_range mm/memory.c:2151 [inline] zap_pud_range mm/memory.c:2179 [inline] zap_p4d_range mm/memory.c:2200 [inline] __zap_vma_range+0x40e1/0x4f80 mm/memory.c:2240 unmap_vmas+0x390/0x550 mm/memory.c:2309 exit_mmap+0x293/0x9f0 mm/mmap.c:1315 __mmput+0x118/0x420 kernel/fork.c:1193 exit_mm+0x18e/0x240 kernel/exit.c:592 do_exit+0x6cd/0x2360 kernel/exit.c:974 do_group_exit+0x22d/0x2f0 kernel/exit.c:1129 get_signal+0x121b/0x12c0 kernel/signal.c:3112 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:343 [inline] do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4f27d9e159 RSP: 002b:00007f4f2814fba8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffdfc RBX: 000000000005e4f5 RCX: 00007f4f27d9e159 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f4f28025fac RBP: 0000000000000032 R08: 3fffffffffffffff R09: 0000000000000000 R10: 00007f4f2814fcb0 R11: 0000000000000246 R12: 00007f4f2814fcd0 R13: 00007f4f28025fac R14: 000000000005e527 R15: 00007f4f2814fcb0 task:kworker/1:12 state:R running task stack:23656 pid:6031 tgid:6031 ppid:2 task_flags:0x4208060 flags:0x00080000 Workqueue: wg-crypt-wg1 wg_packet_encrypt_worker Call Trace: context_switch kernel/sched/core.c:5533 [inline] __schedule+0x17db/0x58f0 kernel/sched/core.c:7284 preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7463 preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12 class_preempt_destructor include/linux/preempt.h:496 [inline] try_to_wake_up+0x901/0x14d0 kernel/sched/core.c:4445 process_one_work kernel/workqueue.c:3364 [inline] process_scheduled_works+0xa3d/0x1630 kernel/workqueue.c:3479 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560 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 task:syz-executor state:R running task stack:24296 pid:5659 tgid:5659 ppid:5653 task_flags:0x40050c flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5533 [inline] __schedule+0x17db/0x58f0 kernel/sched/core.c:7284 preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7463 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:2095 [inline] zap_pmd_range mm/memory.c:2151 [inline] zap_pud_range mm/memory.c:2179 [inline] zap_p4d_range mm/memory.c:2200 [inline] __zap_vma_range+0x40e1/0x4f80 mm/memory.c:2240 unmap_vmas+0x390/0x550 mm/memory.c:2309 exit_mmap+0x293/0x9f0 mm/mmap.c:1315 __mmput+0x118/0x420 kernel/fork.c:1193 exit_mm+0x18e/0x240 kernel/exit.c:592 do_exit+0x6cd/0x2360 kernel/exit.c:974 do_group_exit+0x22d/0x2f0 kernel/exit.c:1129 get_signal+0x121b/0x12c0 kernel/signal.c:3112 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:343 [inline] do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4f27d5e98e RSP: 002b:00007ffe0e73ca58 EFLAGS: 00000246 ORIG_RAX: 000000000000003d RAX: fffffffffffffe00 RBX: 0000555583066500 RCX: 00007f4f27d5e98e RDX: 0000000040000000 RSI: 00007ffe0e73cacc RDI: ffffffffffffffff RBP: 00007ffe0e73cacc R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008 R13: 0000000000000003 R14: 00007ffe0e73cd28 R15: 0000000000000000 task:klogd state:R running task stack:22280 pid:4980 tgid:4980 ppid:1 task_flags:0x400100 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5533 [inline] __schedule+0x17db/0x58f0 kernel/sched/core.c:7284 preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7606 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:orc_find arch/x86/kernel/unwind_orc.c:222 [inline] RIP: 0010:unwind_next_frame+0x1d3/0x2550 arch/x86/kernel/unwind_orc.c:510 Code: c0 48 81 fd e8 98 ea 8b 0f 93 c1 08 c1 0f 85 0b 01 00 00 48 c7 c0 00 00 00 81 49 89 ef 49 29 c7 49 c1 ef 08 8b 15 1d aa f6 0c <8d> 42 ff 44 39 f8 0f 86 6c 04 00 00 44 89 f8 4c 8d 2c 85 c0 a9 c2 RSP: 0018:ffffc900032172a0 EFLAGS: 00000203 RAX: ffffffff81000000 RBX: 0000000000000001 RCX: 8000000000000000 RDX: 00000000000aea9a RSI: ffffffff8c6dad60 RDI: ffffffff8c6dad20 RBP: ffffffff822c6be3 R08: ffffffff8177f1df R09: 0000000000000000 R10: ffffc90003217398 R11: ffffffff81b2a320 R12: dffffc0000000000 R13: ffffffff8177f1df R14: ffffc90003217348 R15: 0000000000012c6b 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:183 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:338 reset_page_owner include/linux/page_owner.h:26 [inline] __free_pages_prepare mm/page_alloc.c:1418 [inline] __free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2962 __slab_free+0x274/0x2c0 mm/slub.c:5823 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_kmalloc+0x22/0xb0 mm/kasan/common.c:417 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5414 [inline] __kmalloc_node_track_caller_noprof+0x4b4/0x720 mm/slub.c:5545 kmalloc_reserve net/core/skbuff.c:637 [inline] __alloc_skb+0x2c1/0x7a0 net/core/skbuff.c:715 alloc_skb include/linux/skbuff.h:1384 [inline] alloc_skb_with_frags+0xc6/0x760 net/core/skbuff.c:6799 sock_alloc_send_pskb+0x878/0x990 net/core/sock.c:3022 unix_dgram_sendmsg+0x4da/0x17b0 net/unix/af_unix.c:2144 sock_sendmsg_nosec+0x13a/0x180 net/socket.c:800 __sock_sendmsg net/socket.c:815 [inline] __sys_sendto+0x408/0x5a0 net/socket.c:2281 __do_sys_sendto net/socket.c:2288 [inline] __se_sys_sendto net/socket.c:2284 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2284 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9506a2f407 RSP: 002b:00007fff4982f560 EFLAGS: 00000202 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f95068dfc80 RCX: 00007f9506a2f407 RDX: 00000000000000a0 RSI: 00007fff4982f6a0 RDI: 0000000000000003 RBP: 00007fff4982fad0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000004000 R11: 0000000000000202 R12: 00007fff4982fae8 R13: 00007fff4982f6a0 R14: 0000000000000085 R15: 00007fff4982f6a0 task:syz.3.127 state:R running task stack:25608 pid:6240 tgid:6240 ppid:5683 task_flags:0x40044c flags:0x00080003 Call Trace: context_switch kernel/sched/core.c:5533 [inline] __schedule+0x17db/0x58f0 kernel/sched/core.c:7284 preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7606 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:unwind_next_frame+0x1a7a/0x2550 arch/x86/kernel/unwind_orc.c:694 Code: 0f 96 c1 4c 39 f8 0f 97 c2 20 ca 80 fa 01 0f 85 f4 00 00 00 49 8d 4f 08 4c 39 e1 0f 86 e7 00 00 00 48 39 c1 0f 87 de 00 00 00 <4c> 3b 7c 24 68 0f 87 d3 00 00 00 49 8d 5e 28 48 89 d8 48 c1 e8 03 RSP: 0018:ffffc90006a5f2a0 EFLAGS: 00000287 RAX: ffffc90006a60000 RBX: ffffc90006a5f358 RCX: ffffc90006a5f988 RDX: ffffc90006a5f301 RSI: dffffc0000000000 RDI: ffffc90006a5f350 RBP: 1ffffffff22c4201 R08: ffffc90006a5f970 R09: 0000000000000000 R10: ffffc90006a5f398 R11: fffff52000d4be75 R12: ffffc90006a58000 R13: ffffffff8177f1df R14: ffffc90006a5f348 R15: ffffc90006a5f980 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:183 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:338 reset_page_owner include/linux/page_owner.h:26 [inline] __free_pages_prepare mm/page_alloc.c:1418 [inline] __free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2962 __slab_free+0x274/0x2c0 mm/slub.c:5823 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:361 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4683 [inline] slab_alloc_node mm/slub.c:4996 [inline] __kmalloc_cache_noprof+0x29f/0x600 mm/slub.c:5559 _kmalloc_noprof include/linux/slab.h:991 [inline] _kzalloc_noprof include/linux/slab.h:1312 [inline] kobject_uevent_env+0x289/0x9e0 lib/kobject_uevent.c:543 __device_release_driver drivers/base/dd.c:1361 [inline] device_release_driver_internal+0x782/0x880 drivers/base/dd.c:1372 driver_detach+0x1f3/0x2d0 drivers/base/dd.c:1435 bus_remove_driver+0x226/0x320 drivers/base/bus.c:832 usb_gadget_unregister_driver+0x4e/0x70 drivers/usb/gadget/udc/core.c:1784 raw_release+0xd7/0x260 drivers/usb/gadget/legacy/raw_gadget.c:463 __fput+0x418/0xa50 fs/file_table.c:512 task_work_run+0x1d9/0x270 kernel/task_work.c:233 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x73a/0x2360 kernel/exit.c:986 do_group_exit+0x22d/0x2f0 kernel/exit.c:1129 get_signal+0x121b/0x12c0 kernel/signal.c:3112 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:343 [inline] do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5afe39e159 RSP: 002b:00007f5afe74fba8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffff92 RBX: 000000000005e6f9 RCX: 00007f5afe39e159 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f5afe625fac RBP: 0000000000000bea R08: 3fffffffffffffff R09: 0000000000000000 R10: 00007f5afe74fcb0 R11: 0000000000000246 R12: 00007f5afe74fcd0 R13: 00007f5afe625fac R14: 000000000005f2e3 R15: 00007f5afe74fcb0 rcu: rcu_preempt kthread starved for 10897 jiffies! g20461 f0x0 RCU_GP_WAIT_FQS(5) ->state=R ->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:27688 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5533 [inline] __schedule+0x17db/0x58f0 kernel/sched/core.c:7284 __schedule_loop kernel/sched/core.c:7361 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7376 schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99 rcu_gp_fqs_loop+0x30c/0x11f0 kernel/rcu/tree.c:2122 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2330 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: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:unwind_next_frame+0xfd/0x2550 arch/x86/kernel/unwind_orc.c:498 Code: 1f c6 05 bc d0 eb 0e 01 48 c7 c7 c0 c3 09 8c be 53 03 00 00 48 c7 c2 00 c4 09 8c e8 cd a0 2b 00 48 89 6c 24 38 48 89 5c 24 40 <49> 8d 5e 50 48 89 d8 48 c1 e8 03 48 89 44 24 28 42 80 3c 20 00 74 RSP: 0018:ffffc90000a17e60 EFLAGS: 00000202 RAX: 0000000000000001 RBX: ffffffff89b590e9 RCX: 0000000000000102 RDX: 00000000e61b7dd1 RSI: ffffffff8c6dad60 RDI: ffffffff8c6dad20 RBP: 1ffff92000142fe8 R08: ffffffff8177f1df R09: 0000000000000000 R10: ffffc90000a17f58 R11: ffffffff81b2a320 R12: dffffc0000000000 R13: ffffffff8177f1df R14: ffffc90000a17f08 R15: 1ffff92000142fe1 FS: 0000000000000000(0000) GS:ffff888124dc8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000034e030 CR3: 000000005c14a000 CR4: 00000000003526f0 Call Trace: 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 unpoison_slab_object mm/kasan/common.c:351 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:377 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4683 [inline] slab_alloc_node mm/slub.c:4996 [inline] kmem_cache_alloc_noprof+0x2b9/0x600 mm/slub.c:5010 skb_clone+0x212/0x3a0 net/core/skbuff.c:2119 deliver_clone net/bridge/br_forward.c:125 [inline] maybe_deliver net/bridge/br_forward.c:191 [inline] br_flood+0x3c0/0x8d0 net/bridge/br_forward.c:245 br_handle_frame_finish+0x1119/0x1950 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+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+0x1329/0x1600 net/bridge/br_input.c:451 __netif_receive_skb_core+0x989/0x30c0 net/core/dev.c:6152 __netif_receive_skb_one_core net/core/dev.c:6263 [inline] __netif_receive_skb net/core/dev.c:6378 [inline] process_backlog+0x727/0x18b0 net/core/dev.c:6729 __napi_poll+0xaa/0x330 net/core/dev.c:7798 napi_poll net/core/dev.c:7861 [inline] net_rx_action+0x61d/0xf50 net/core/dev.c:8018 handle_softirqs+0x226/0x860 kernel/softirq.c:645 __do_softirq kernel/softirq.c:679 [inline] invoke_softirq kernel/softirq.c:519 [inline] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758 irq_exit_rcu+0x9/0x30 kernel/softirq.c:775 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64 Code: fb 87 02 c3 cc cc cc cc cc cc cc 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 d3 e1 22 00 fb f4 8c 08 03 00 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 RSP: 0018:ffffc900001a7e40 EFLAGS: 00000242 RAX: 0000000000dfe675 RBX: ffffffff819bcb1c RCX: 8000000000000001 RDX: 0000000000000001 RSI: ffffffff8e415fcc RDI: ffffffff8c6dad80 RBP: ffffc900001a7f10 R08: ffff8880b8733a1b R09: 1ffff110170e6743 R10: dffffc0000000000 R11: ffffed10170e6744 R12: 0000000000000000 R13: 1ffff11003cd1bb8 R14: 1ffff92000034fd0 R15: dffffc0000000000 arch_safe_halt arch/x86/kernel/process.c:767 [inline] default_idle+0x9/0x20 arch/x86/kernel/process.c:768 default_idle_call+0x72/0xb0 kernel/sched/idle.c:122 cpuidle_idle_call kernel/sched/idle.c:199 [inline] do_idle+0x1cc/0x540 kernel/sched/idle.c:355 cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:454 start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312 common_startup_64+0x13e/0x157 bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0)