bridge0: received packet on veth0_to_bridge with own address as source address (addr:2a:bf:d4:f3:88:27, vlan:0) bridge0: received packet on bridge_slave_0 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): P7752/2:b..l rcu: (detected by 0, t=10502 jiffies, g=428789, q=1569 ncpus=1) task:syz.4.9829 state:R running task stack:24656 pid:7752 tgid:7750 ppid:1976 task_flags:0x20400140 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5298 [inline] __schedule+0xfee/0x6120 kernel/sched/core.c:6911 preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7238 irqentry_exit+0x17b/0x670 kernel/entry/common.c:239 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:229 [inline] RIP: 0010:unwind_next_frame+0x25b/0x1ea0 arch/x86/kernel/unwind_orc.c:510 Code: 24 18 8d 50 01 8b 0c 8d 0c b8 33 92 48 b8 00 00 00 00 00 fc ff df 48 8d 3c 95 0c b8 33 92 49 89 f8 49 c1 e8 03 45 0f b6 04 00 <48> 89 f8 83 e0 07 83 c0 03 44 38 c0 7c 2e 45 84 c0 74 29 48 89 54 RSP: 0018:ffffc90003ba6f60 EFLAGS: 00000a02 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 00000000000b0349 RDX: 000000000003cf09 RSI: 00000000000a91df RDI: ffffffff9242f430 RBP: ffffc90003ba7018 R08: 0000000000000000 R09: 0000000000000007 R10: 0000000000000200 R11: 000000000003cf08 R12: ffffc90003ba7020 R13: ffffc90003ba6fd0 R14: ffffc90003ba7005 R15: ffffffff84cf086e arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122 kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:556 __call_rcu_common.constprop.0+0xa5/0x9b0 kernel/rcu/tree.c:3131 slab_free_hook mm/slub.c:2649 [inline] slab_free mm/slub.c:6165 [inline] kmem_cache_free+0x44b/0x6a0 mm/slub.c:6295 mempool_free+0xde/0x130 mm/mempool.c:711 bio_put_percpu_cache block/bio.c:845 [inline] bio_put+0x34f/0x5b0 block/bio.c:864 bio_endio+0x7a3/0x910 block/bio.c:1792 blk_update_request+0x741/0x13a0 block/blk-mq.c:1016 blk_mq_end_request+0x5b/0x420 block/blk-mq.c:1178 blk_mq_complete_request block/blk-mq.c:1356 [inline] blk_mq_complete_request+0x8b/0xb0 block/blk-mq.c:1353 nullb_complete_cmd drivers/block/null_blk/main.c:1412 [inline] null_handle_cmd drivers/block/null_blk/main.c:1464 [inline] null_queue_rq+0xb48/0xfb0 drivers/block/null_blk/main.c:1703 null_queue_rqs+0xe9/0x2f0 drivers/block/null_blk/main.c:1717 __blk_mq_flush_list block/blk-mq.c:2858 [inline] __blk_mq_flush_list+0x9a/0xc0 block/blk-mq.c:2854 blk_mq_dispatch_queue_requests+0x184/0x7c0 block/blk-mq.c:2903 blk_mq_flush_plug_list+0x1f2/0x600 block/blk-mq.c:2991 __blk_flush_plug+0x2c4/0x4b0 block/blk-core.c:1230 blk_finish_plug+0x5c/0xa0 block/blk-core.c:1257 blkdev_writepages+0xf6/0x150 block/fops.c:487 do_writepages+0x278/0x600 mm/page-writeback.c:2554 filemap_writeback+0x22d/0x2e0 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:276 [inline] sync_blockdev block/bdev.c:272 [inline] bdev_release+0x4d3/0x6d0 block/bdev.c:1142 blkdev_release+0x15/0x20 block/fops.c:705 __fput+0x3ff/0xb40 fs/file_table.c:469 task_work_run+0x150/0x240 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:67 [inline] exit_to_user_mode_loop+0x100/0x4a0 kernel/entry/common.c:98 __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 include/linux/entry-common.h:325 [inline] do_syscall_64+0x668/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f29b519c799 RSP: 002b:00007f29b5fa4028 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007f29b5415fa0 RCX: 00007f29b519c799 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000002 RBP: 00007f29b5232c99 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f29b5416038 R14: 00007f29b5415fa0 R15: 00007fffcf8a0f08 net_ratelimit: 3297 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 veth0_to_bridge with own address as source address (addr:2a:bf:d4:f3:88:27, 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 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:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:2a:bf:d4:f3:88:27, 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 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:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:2a:bf:d4:f3:88:27, vlan:0) net_ratelimit: 3488 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 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:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:2a:bf:d4:f3:88:27, 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 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:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:2a:bf:d4:f3:88:27, 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 bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)