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:56:f6:cb:67:79:b6, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P11746/1:b..l rcu: (detected by 0, t=10502 jiffies, g=53941, q=1990 ncpus=1) task:syz.4.1254 state:R running task stack:24056 pid:11746 tgid:11738 ppid:9702 task_flags:0x2040054c 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:__rcu_read_unlock+0xf1/0x5a0 kernel/rcu/tree_plugin.h:441 Code: 00 00 85 c0 75 55 65 48 8b 1d 63 95 0e 12 48 8d bb 84 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 78 01 00 00 8b RSP: 0018:ffffc9000bb86990 EFLAGS: 00000a07 RAX: dffffc0000000000 RBX: ffff88802e421e80 RCX: ffffc9000bb8697c RDX: 0000000000000000 RSI: ffffffff8daa50c6 RDI: ffff88802e422304 RBP: ffff88802e421e80 R08: ffffffff9159461c R09: 000000007b671074 R10: 0000000000000002 R11: 00000000000383b1 R12: ffff88802e421e80 R13: ffffc9000bb86a28 R14: ffffc9000bb87a88 R15: ffffc9000bb86a5c rcu_read_unlock include/linux/rcupdate.h:899 [inline] class_rcu_destructor include/linux/rcupdate.h:1195 [inline] unwind_next_frame+0x3fe/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 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_noprof+0x25e/0x770 mm/slub.c:5270 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+0x413/0x660 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:3104 slab_free_hook mm/slub.c:2504 [inline] slab_free mm/slub.c:6670 [inline] kmem_cache_free+0x171/0x770 mm/slub.c:6781 mempool_free+0xde/0x130 mm/mempool.c:712 bio_put_percpu_cache block/bio.c:808 [inline] bio_put+0x355/0x5b0 block/bio.c:827 bio_endio+0x751/0x8a0 block/bio.c:1675 blk_update_request+0x914/0x15c0 block/blk-mq.c:1007 blk_mq_end_request+0x59/0x420 block/blk-mq.c:1169 blk_mq_complete_request block/blk-mq.c:1347 [inline] blk_mq_complete_request+0x8b/0xb0 block/blk-mq.c:1344 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:2848 [inline] __blk_mq_flush_list+0x9a/0xc0 block/blk-mq.c:2844 blk_mq_dispatch_queue_requests+0x184/0x7b0 block/blk-mq.c:2893 blk_mq_flush_plug_list+0x1f2/0x600 block/blk-mq.c:2981 __blk_flush_plug+0x2c4/0x4b0 block/blk-core.c:1225 blk_finish_plug block/blk-core.c:1252 [inline] blk_finish_plug+0x53/0xa0 block/blk-core.c:1249 blkdev_writepages+0xe9/0x140 block/fops.c:488 do_writepages+0x27a/0x600 mm/page-writeback.c:2598 filemap_writeback+0x225/0x2d0 mm/filemap.c:387 filemap_fdatawrite_range mm/filemap.c:412 [inline] filemap_write_and_wait_range mm/filemap.c:684 [inline] filemap_write_and_wait_range+0xa6/0x130 mm/filemap.c:675 filemap_write_and_wait include/linux/pagemap.h:65 [inline] sync_blockdev block/bdev.c:277 [inline] sync_blockdev block/bdev.c:273 [inline] bdev_release+0x4d3/0x6d0 block/bdev.c:1143 blkdev_release+0x15/0x20 block/fops.c:706 __fput+0x402/0xb70 fs/file_table.c:468 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+0x8c/0x540 kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline] do_syscall_64+0x4ee/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5fba98f7c9 RSP: 002b:00007f5fbb7c6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: fffffffffffffffc RBX: 00007f5fbabe6270 RCX: 00007f5fba98f7c9 RDX: 0000000000000003 RSI: 0000200000000a80 RDI: 0000000000000003 RBP: 00007f5fbaa13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5fbabe6308 R14: 00007f5fbabe6270 R15: 00007fff11e3f778 net_ratelimit: 24597 callbacks suppressed 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 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:56:f6:cb:67:79:b6, 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:1b, 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:56:f6:cb:67:79:b6, 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:1b, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) net_ratelimit: 20580 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:56:f6:cb:67:79:b6, 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:1b, 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:56:f6:cb:67:79:b6, 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:1b, 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:56:f6:cb:67:79:b6, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)