bridge0: port 1(bridge_slave_0) entered disabled state
device veth1_macvtap left promiscuous mode
device veth0_macvtap left promiscuous mode
device veth1_vlan left promiscuous mode
device veth0_vlan left promiscuous mode
INFO: task syz-executor.2:29006 blocked for more than 140 seconds.
      Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2  D29920 29006   8121 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
 rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309
 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:83 [inline]
 down_read+0x44/0x80 kernel/locking/rwsem.c:26
 iterate_supers+0xdb/0x290 fs/super.c:631
 ksys_sync+0x86/0x150 fs/sync.c:113
 __ia32_sys_sync+0xa/0x10 fs/sync.c:124
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fc36e1c60c9
Code: Bad RIP value.
RSP: 002b:00007fc36c717168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007fc36e2e6050 RCX: 00007fc36e1c60c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fc36e221ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff53acde8f R14: 00007fc36c717300 R15: 0000000000022000

Showing all locks held in the system:
3 locks held by kworker/0:1/14:
 #0: 000000000a6118ae ((wq_completion)"events"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124
 #1: 00000000c46728f3 (deferred_process_work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128
 #2: 00000000e74b25ad (rtnl_mutex){+.+.}, at: switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:150
1 lock held by khungtaskd/1570:
 #0: 000000009b7ecf1b (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441
1 lock held by in:imklog/7809:
 #0: 000000006f82f845 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767
2 locks held by agetty/8038:
3 locks held by kworker/0:2/9331:
 #0: 000000000a6118ae ((wq_completion)"events"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124
 #1: 00000000d5b3d6ba ((linkwatch_work).work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128
 #2: 00000000e74b25ad (rtnl_mutex){+.+.}, at: linkwatch_event+0xb/0x60 net/core/link_watch.c:236
4 locks held by kworker/u4:10/17217:
1 lock held by syz-executor.1/21205:
 #0: 000000003fd30ca0 (&type->s_umount_key#85/1){+.+.}, at: alloc_super fs/super.c:226 [inline]
 #0: 000000003fd30ca0 (&type->s_umount_key#85/1){+.+.}, at: sget_userns+0x20b/0xcd0 fs/super.c:519
1 lock held by syz-executor.1/21729:
 #0: 000000001a789c79 (&type->s_umount_key#85/1){+.+.}, at: alloc_super fs/super.c:226 [inline]
 #0: 000000001a789c79 (&type->s_umount_key#85/1){+.+.}, at: sget_userns+0x20b/0xcd0 fs/super.c:519
1 lock held by syz-executor.1/22144:
 #0: 00000000c012fb5a (&type->s_umount_key#85/1){+.+.}, at: alloc_super fs/super.c:226 [inline]
 #0: 00000000c012fb5a (&type->s_umount_key#85/1){+.+.}, at: sget_userns+0x20b/0xcd0 fs/super.c:519
2 locks held by kworker/u4:12/27331:
1 lock held by syz-executor.2/29006:
 #0: 000000003fd30ca0 (&type->s_umount_key#97){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631
1 lock held by syz-executor.2/29413:
 #0: 000000003fd30ca0 (&type->s_umount_key#97){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631
2 locks held by syz-executor.1/30597:
 #0: 0000000001dab928 (pernet_ops_rwsem){++++}, at: copy_net_ns+0x1d8/0x340 net/core/net_namespace.c:435
 #1: 00000000e74b25ad (rtnl_mutex){+.+.}, at: cangw_pernet_exit+0xe/0x20 net/can/gw.c:1032

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

NMI backtrace for cpu 1
CPU: 1 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline]
 watchdog+0x991/0xe60 kernel/hung_task.c:287
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 8038 Comm: agetty Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
RIP: 0010:__sanitizer_cov_trace_pc+0x22/0x50 kernel/kcov.c:101
Code: 90 90 90 90 90 90 90 90 48 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 75 2b 8b 90 60 13 00 00 <83> fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 00 00 48 8b 11 48
RSP: 0018:ffff88809d5d7cc8 EFLAGS: 00000246
RAX: ffff8880a9664680 RBX: 0000000000020000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff81b398da RDI: ffff8880b2749100
RBP: ffff8880b2749498 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000020000 R14: ffff8880b2749100 R15: ffff8880b2749100
FS:  00007ff9c58aa500(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00079bddc CR3: 00000000ab226000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 fsnotify+0x9a/0xe10 fs/notify/fsnotify.c:325
 fsnotify_perm include/linux/fsnotify.h:52 [inline]
 security_file_permission+0x1b8/0x220 security/security.c:875
 rw_verify_area+0x104/0x330 fs/read_write.c:391
 vfs_read+0x145/0x3c0 fs/read_write.c:448
 ksys_read+0x12b/0x2a0 fs/read_write.c:579
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7ff9c53c7910
Code: b6 fe ff ff 48 8d 3d 0f be 08 00 48 83 ec 08 e8 06 db 01 00 66 0f 1f 44 00 00 83 3d f9 2d 2c 00 00 75 10 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 de 9b 01 00 48 89 04 24
RSP: 002b:00007fff8a587f58 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff9c53c7910
RDX: 0000000000000001 RSI: 00007fff8a587fbf RDI: 0000000000000000
RBP: 0000000000000008 R08: ffffffffffffff98 R09: 00007fff8a586e10
R10: 000000000000016d R11: 0000000000000246 R12: 0000000000000000
R13: 000056251ac77900 R14: 00007fff8a587fc0 R15: 0000000000000012