netlink: 'syz-executor.3': attribute type 1 has an invalid length. device bridge539 entered promiscuous mode bond537: making interface vlan476 the new active one bond537: Enslaving vlan476 as an active interface with an up link watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.0:20422] Modules linked in: irq event stamp: 4283601 hardirqs last enabled at (4283600): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (4283601): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (252686): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (255455): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (255455): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 20422 Comm: syz-executor.0 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x50/0x80 kernel/locking/spinlock.c:192 Code: c0 98 82 f1 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 31 48 83 3d 01 31 d8 01 00 74 25 fb 66 0f 1f 44 00 00 01 00 00 00 e8 26 1b 28 f9 65 8b 05 9f 8d e8 77 85 c0 74 02 5d RSP: 0000:ffff8880ba007de0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3053 RBX: dffffc0000000000 RCX: 1ffff110126d1124 RDX: dffffc0000000000 RSI: ffff888093688928 RDI: ffff888093688884 RBP: ffff8880ba022b40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8688f6d0 R13: ffff8880ba022b40 R14: ffff8880ba007e78 R15: 0000000000000000 FS: 00007f53c5197700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff1d0a0ff8 CR3: 000000023880a000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: expire_timers+0x238/0x4e0 kernel/time/timer.c:1374 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:lock_is_held_type+0x17a/0x210 kernel/locking/lockdep.c:3948 Code: 00 00 00 00 fc ff df c7 85 84 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 75 63 48 83 3d 45 cc a6 08 00 74 2c 48 89 df 57 9d <0f> 1f 44 00 00 48 83 c4 08 44 89 e0 5b 5d 41 5c c3 48 83 c4 08 41 RSP: 0000:ffff88823a84f2f0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3051 RBX: 0000000000000286 RCX: ffffffff81b3d354 RDX: dffffc0000000000 RSI: 00000000ffffffff RDI: 0000000000000286 RBP: ffff888093688000 R08: 000000002ebba2b6 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: 1ffff11047509e68 R15: ffff8880ae447ce0 lock_is_held include/linux/lockdep.h:344 [inline] srcu_read_lock_held include/linux/srcu.h:133 [inline] fsnotify_grab_connector+0x162/0x200 fs/notify/mark.c:521 fsnotify_destroy_marks+0x6a/0x240 fs/notify/mark.c:737 fsnotify_inoderemove include/linux/fsnotify.h:132 [inline] dentry_unlink_inode+0x29a/0x320 fs/dcache.c:370 d_delete+0x210/0x280 fs/dcache.c:2372 __debugfs_remove_file fs/debugfs/inode.c:628 [inline] __debugfs_remove.part.0+0x10b/0x1b0 fs/debugfs/inode.c:658 __debugfs_remove include/linux/dcache.h:322 [inline] debugfs_remove_recursive fs/debugfs/inode.c:740 [inline] debugfs_remove_recursive+0x1ba/0x4c0 fs/debugfs/inode.c:709 blk_mq_debugfs_unregister_hctx+0x34/0xa0 block/blk-mq-debugfs.c:925 blk_mq_exit_hctx.constprop.0+0x20/0x280 block/blk-mq.c:2168 blk_mq_exit_hw_queues block/blk-mq.c:2191 [inline] blk_mq_exit_queue+0x1aa/0x520 block/blk-mq.c:2679 blk_cleanup_queue+0x549/0x7f0 block/blk-core.c:822 nbd_dev_remove drivers/block/nbd.c:218 [inline] nbd_put.part.0+0xb6/0x140 drivers/block/nbd.c:231 nbd_put drivers/block/nbd.c:228 [inline] nbd_genl_connect+0x120e/0x1630 drivers/block/nbd.c:1913 genl_family_rcv_msg+0x642/0xc40 net/netlink/genetlink.c:602 genl_rcv_msg+0xbf/0x160 net/netlink/genetlink.c:627 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463 genl_rcv+0x24/0x40 net/netlink/genetlink.c:638 netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351 netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227 __sys_sendmsg net/socket.c:2265 [inline] __do_sys_sendmsg net/socket.c:2274 [inline] __se_sys_sendmsg net/socket.c:2272 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f53c6822059 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f53c5197168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f53c6934f60 RCX: 00007f53c6822059 RDX: 0000000000000000 RSI: 0000000020000380 RDI: 000000000000000f RBP: 00007f53c687c08d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffca7071e3f R14: 00007f53c5197300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 16915 Comm: kworker/1:32 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: rcu_gp process_srcu RIP: 0010:hlock_class kernel/locking/lockdep.c:152 [inline] RIP: 0010:mark_lock+0x86/0x1160 kernel/locking/lockdep.c:3106 Code: 89 f1 48 c1 e9 03 0f b6 14 11 84 d2 74 09 80 fa 03 0f 8e d2 07 00 00 25 ff 1f 00 00 48 69 d8 50 01 00 00 48 81 eb 50 01 00 00 <48> 81 c3 80 f5 d5 8c 48 8d 7b 30 48 b8 00 00 00 00 00 fc ff df 48 RSP: 0018:ffff888027c8fc58 EFLAGS: 00000002 RAX: 0000000000000150 RBX: 000000000001b7b0 RCX: 1ffff110057a8d9a RDX: 0000000000000000 RSI: ffff88802bd46cb0 RDI: ffff88802bd46400 RBP: ffff88802bd46cb0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000040 R13: ffff88802bd46400 R14: ffff88802bd46cd0 R15: 0000000000000006 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000560aefda9d10 CR3: 00000000a4bdd000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mark_held_locks+0xa6/0xf0 kernel/locking/lockdep.c:2810 __trace_hardirqs_on_caller kernel/locking/lockdep.c:2839 [inline] lockdep_hardirqs_on+0x3a8/0x5c0 kernel/locking/lockdep.c:2884 queue_delayed_work_on+0x13e/0x200 kernel/workqueue.c:1565 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 ---------------- Code disassembly (best guess), 5 bytes skipped: 0: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 7: fc ff df a: 48 c1 e8 03 shr $0x3,%rax e: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) 12: 75 31 jne 0x45 14: 48 83 3d 01 31 d8 01 cmpq $0x0,0x1d83101(%rip) # 0x1d8311d 1b: 00 1c: 74 25 je 0x43 1e: fb sti 1f: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) * 25: bf 01 00 00 00 mov $0x1,%edi <-- trapping instruction 2a: e8 26 1b 28 f9 callq 0xf9281b55 2f: 65 8b 05 9f 8d e8 77 mov %gs:0x77e88d9f(%rip),%eax # 0x77e88dd5 36: 85 c0 test %eax,%eax 38: 74 02 je 0x3c 3a: 5d pop %rbp