bridge0: received packet on veth0_to_bridge with own address as source address (addr:ea:cf:dd:df:94:40, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6044/2:b..l rcu: (detected by 1, t=10502 jiffies, g=12565, q=3196 ncpus=2) task:syz.3.20 state:R running task stack:24984 pid:6044 tgid:6043 ppid:5854 task_flags:0x20400140 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5397 [inline] __schedule+0x116a/0x5dd0 kernel/sched/core.c:6786 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7109 irqentry_exit+0x36/0x90 kernel/entry/common.c:307 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_acquire+0x62/0x350 kernel/locking/lockdep.c:5875 Code: 1c 37 12 83 f8 07 0f 87 bc 02 00 00 89 c0 48 0f a3 05 f2 47 11 0f 0f 82 74 02 00 00 8b 35 ba 79 11 0f 85 f6 0f 85 8d 00 00 00 <48> 8b 44 24 30 65 48 2b 05 89 1c 37 12 0f 85 c7 02 00 00 48 83 c4 RSP: 0018:ffffc90004946950 EFLAGS: 00000206 RAX: 0000000000000046 RBX: ffffffff8e5c4c80 RCX: 000000003af2fa91 RDX: 0000000000000000 RSI: ffffffff8de04a0a RDI: ffffffff8c155de0 RBP: 0000000000000002 R08: 5966e7f02efeb9df R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 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+0xd1/0x20a0 arch/x86/kernel/unwind_orc.c:479 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:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4148 [inline] slab_alloc_node mm/slub.c:4197 [inline] kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4204 kmem_alloc_batch+0x49/0x170 lib/debugobjects.c:371 fill_pool lib/debugobjects.c:403 [inline] debug_objects_fill_pool lib/debugobjects.c:725 [inline] debug_objects_fill_pool+0x228/0x500 lib/debugobjects.c:697 debug_object_activate+0x10b/0x4c0 lib/debugobjects.c:814 debug_rcu_head_queue kernel/rcu/rcu.h:236 [inline] __call_rcu_common.constprop.0+0x35/0xa10 kernel/rcu/tree.c:3079 slab_free_hook mm/slub.c:2345 [inline] slab_free mm/slub.c:4643 [inline] kmem_cache_free+0x16d/0x4d0 mm/slub.c:4745 mempool_free+0xea/0x3b0 mm/mempool.c:548 bio_put_percpu_cache block/bio.c:801 [inline] bio_put+0x355/0x5b0 block/bio.c:820 bio_endio+0x70d/0x850 block/bio.c:1645 blk_update_request+0x96b/0x1630 block/blk-mq.c:987 blk_mq_end_request+0x5b/0x630 block/blk-mq.c:1149 blk_mq_complete_request block/blk-mq.c:1327 [inline] blk_mq_complete_request+0x88/0xb0 block/blk-mq.c:1324 nullb_complete_cmd drivers/block/null_blk/main.c:1402 [inline] null_handle_cmd drivers/block/null_blk/main.c:1454 [inline] null_queue_rq+0xb69/0xfd0 drivers/block/null_blk/main.c:1693 null_queue_rqs+0xe9/0x2f0 drivers/block/null_blk/main.c:1707 __blk_mq_flush_list block/blk-mq.c:2826 [inline] __blk_mq_flush_list+0x9a/0xc0 block/blk-mq.c:2822 blk_mq_dispatch_queue_requests+0x184/0x7b0 block/blk-mq.c:2871 blk_mq_flush_plug_list+0x1f2/0x600 block/blk-mq.c:2959 blk_add_rq_to_plug+0x1ca/0x540 block/blk-mq.c:1388 blk_mq_submit_bio+0x18d5/0x26a0 block/blk-mq.c:3208 __submit_bio+0x3cf/0x690 block/blk-core.c:635 __submit_bio_noacct_mq block/blk-core.c:722 [inline] submit_bio_noacct_nocheck+0x660/0xd30 block/blk-core.c:751 submit_bio_noacct+0x50d/0x1eb0 block/blk-core.c:874 __block_write_full_folio+0x735/0xe00 fs/buffer.c:1939 block_write_full_folio+0x341/0x400 fs/buffer.c:2760 blkdev_writepages+0xb8/0x140 block/fops.c:483 do_writepages+0x277/0x600 mm/page-writeback.c:2636 filemap_fdatawrite_wbc mm/filemap.c:386 [inline] filemap_fdatawrite_wbc+0x104/0x160 mm/filemap.c:376 __filemap_fdatawrite_range+0xb2/0xf0 mm/filemap.c:419 filemap_write_and_wait_range mm/filemap.c:691 [inline] filemap_write_and_wait_range+0xa3/0x130 mm/filemap.c:682 filemap_write_and_wait include/linux/pagemap.h:68 [inline] sync_blockdev block/bdev.c:260 [inline] sync_blockdev block/bdev.c:256 [inline] bdev_release+0x4d3/0x6d0 block/bdev.c:1126 blkdev_release+0x15/0x20 block/fops.c:684 __fput+0x402/0xb70 fs/file_table.c:465 task_work_run+0x150/0x240 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xeb/0x110 kernel/entry/common.c:114 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline] do_syscall_64+0x3f6/0x490 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc4b6b8e9a9 RSP: 002b:00007fc4b79c7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: 0000000000ffffc0 RBX: 00007fc4b6db5fa0 RCX: 00007fc4b6b8e9a9 RDX: 0000000080000000 RSI: 0000200000000040 RDI: 0000000000000005 RBP: 00007fc4b6c10d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fc4b6db5fa0 R15: 00007fffd34adac8 net_ratelimit: 12591 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:ea:cf:dd:df:94:40, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ea:cf:dd:df:94:40, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ea:cf:dd:df:94:40, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ea:cf:dd:df:94:40, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ea:cf:dd:df:94:40, vlan:0) net_ratelimit: 14935 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:ea:cf:dd:df:94:40, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ea:cf:dd:df:94:40, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ea:cf:dd:df:94:40, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ea:cf:dd:df:94:40, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ea:cf:dd:df:94:40, vlan:0)