INFO: task udevd:5838 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D stack:22120 pid:5838  tgid:5838  ppid:5280   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x14ef/0x4fb0
 schedule+0x164/0x360
 io_schedule+0x7f/0xd0
 folio_wait_bit_common+0x6d8/0xbc0
 do_read_cache_folio+0x1ad/0x590
 read_part_sector+0xb6/0x2b0
 adfspart_check_POWERTEC+0x92/0xef0
 bdev_disk_changed+0x765/0x14c0
 blkdev_get_whole+0x380/0x510
 bdev_open+0x31e/0xd30
 blkdev_open+0x470/0x610
 do_dentry_open+0x7ce/0x1420
 vfs_open+0x3b/0x340
 path_openat+0x3486/0x3e20
 do_filp_open+0x22d/0x490
 do_sys_openat2+0x12f/0x220
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f750d9169a4
RSP: 002b:00007ffe9c635f60 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055f4dc7ea220 RCX: 00007f750d9169a4
RDX: 00000000000a0800 RSI: 000055f4dc7d2ad0 RDI: 00000000ffffff9c
RBP: 000055f4dc7d2ad0 R08: 0000000000000001 R09: 3fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 000055f4dc7df2c0 R14: 0000000000000001 R15: 000055f4dc7c9910
 </TASK>

Showing all locks held in the system:
4 locks held by kworker/u8:1/13:
3 locks held by ksoftirqd/1/23:
1 lock held by khungtaskd/35:
 #0: ffffffff8e35a360 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by dhcpcd/5576:
 #0: ffff8881046a16f0 (nlk_cb_mutex-ROUTE){+.+.}-{4:4}, at: netlink_dump+0xe4/0xe80
 #1: ffffffff8f7a8c08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dumpit+0x92/0x200
2 locks held by getty/5658:
 #0: ffff8881158a40a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000357b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0
1 lock held by udevd/5838:
 #0: ffff88810a8a6358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xe0/0xd30
2 locks held by kworker/u8:2/5842:
3 locks held by kworker/u8:4/5860:
 #0: ffff8881740f9948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x9d4/0x17a0
 #1: ffffc90005347bc0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa0f/0x17a0
 #2: ffffffff8f7a8c08 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x19/0x30
3 locks held by kworker/1:6/5898:
 #0: ffff888100075948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9d4/0x17a0
 #1: ffffc90005887bc0 (deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0xa0f/0x17a0
 #2: ffffffff8f7a8c08 (rtnl_mutex){+.+.}-{4:4}, at: switchdev_deferred_process_work+0xe/0x20
2 locks held by syz-executor/7778:
 #0: ffffffff8f79a290 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x3cb/0x570
 #1: ffffffff8f7a8c08 (rtnl_mutex){+.+.}-{4:4}, at: ip6mr_net_exit_batch+0x20/0x90
2 locks held by syz-executor/7784:
 #0: ffffffff8f79a290 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x3cb/0x570
 #1: ffffffff8f7a8c08 (rtnl_mutex){+.+.}-{4:4}, at: ops_undo_list+0x2a4/0x940
2 locks held by syz-executor/7793:
 #0: ffffffff8f79a290 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x3cb/0x570
 #1: ffffffff8f7a8c08 (rtnl_mutex){+.+.}-{4:4}, at: ip6mr_net_exit_batch+0x20/0x90
2 locks held by syz-executor/7795:
 #0: ffffffff8f79a290 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x3cb/0x570
 #1: ffffffff8f7a8c08 (rtnl_mutex){+.+.}-{4:4}, at: ops_undo_list+0x2a4/0x940
2 locks held by syz-executor/7798:
 #0: ffffffff8f79a290 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x3cb/0x570
 #1: ffffffff8f7a8c08 (rtnl_mutex){+.+.}-{4:4}, at: register_nexthop_notifier+0x88/0x290
1 lock held by syz-executor/7801:
 #0: ffffffff8f7a8c08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x404/0x1ad0
1 lock held by syz-executor/7804:
 #0: ffffffff8f7a8c08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x404/0x1ad0
1 lock held by syz-executor/7807:
 #0: ffffffff8f7a8c08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x404/0x1ad0
1 lock held by syz-executor/7811:
 #0: ffffffff8f7a8c08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x404/0x1ad0
1 lock held by syz-executor/7813:
 #0: ffffffff8f7a8c08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x404/0x1ad0

=============================================

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 35 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xf90/0xfe0
 kthread+0x726/0x8b0
 ret_from_fork+0x51b/0xa40
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 3124 Comm: kworker/u10:9 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:rcu_is_watching+0x15/0xb0
Code: 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 53 65 ff 05 60 69 27 11 e8 5b 42 d1 09 <89> c3 83 f8 08 73 65 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd d0
RSP: 0018:ffffc90000006d98 EFLAGS: 00000206
RAX: 0000000000000000 RBX: ffffffff8169b3db RCX: 0000000000000103
RDX: 000000008eba6367 RSI: ffffffff8be73860 RDI: ffffffff8be73820
RBP: dffffc0000000000 R08: ffffffff8174c0e5 R09: ffffffff8e35a360
R10: ffffc90000006ed8 R11: ffffffff81ae5cf0 R12: 1ffff92000000dd1
R13: ffffc90000006ec0 R14: ffffc90000006e88 R15: ffffffff8174c0e5
FS:  0000000000000000(0000) GS:ffff88818e324000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f39e7087e20 CR3: 000000000e146000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 unwind_next_frame+0xd4/0x23c0
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_noprof+0x370/0x6e0
 skb_clone+0x212/0x3a0
 maybe_deliver+0x98/0x160
 br_flood+0x31a/0x690
 br_handle_frame_finish+0x1492/0x1b40
 br_nf_hook_thresh+0x3dd/0x4c0
 br_nf_pre_routing_finish_ipv6+0xa3a/0xd70
 br_nf_pre_routing_ipv6+0x374/0x6f0
 br_handle_frame+0x989/0x1520
 __netif_receive_skb_core+0x98f/0x30a0
 __netif_receive_skb+0x72/0x370
 process_backlog+0x54e/0x1340
 __napi_poll+0xae/0x320
 net_rx_action+0x696/0xe30
 handle_softirqs+0x22a/0x7c0
 do_softirq+0x76/0xd0
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0xf8/0x130
 __alloc_skb+0x1aa/0x7d0
 nsim_dev_trap_report_work+0x29a/0xb80
 process_scheduled_works+0xaec/0x17a0
 worker_thread+0x89f/0xd90
 kthread+0x726/0x8b0
 ret_from_fork+0x51b/0xa40
 ret_from_fork_asm+0x1a/0x30
 </TASK>
net_ratelimit: 40697 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:e1:5b:c3:c8:ef, 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:6a:e1:5b:c3:c8:ef, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:e1:5b:c3:c8:ef, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:e1:5b:c3:c8:ef, 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:6a:e1:5b:c3:c8:ef, 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:6a:e1:5b:c3:c8:ef, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:e1:5b:c3:c8:ef, vlan:0)
