bond0 (unregistering): Releasing backup interface bond_slave_0 bond0 (unregistering): Released all slaves ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy1 wpan1: encryption failed: -22 INFO: task syz-executor.1:8762 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.1 D27296 8762 31070 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 schedule_timeout+0x92d/0xfe0 kernel/time/timer.c:1794 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common+0x29c/0x470 kernel/sched/completion.c:115 flush_workqueue+0x40b/0x13e0 kernel/workqueue.c:2713 nbd_start_device_ioctl drivers/block/nbd.c:1276 [inline] __nbd_ioctl drivers/block/nbd.c:1347 [inline] nbd_ioctl+0x75b/0xbe0 drivers/block/nbd.c:1387 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x5cb/0x1a80 block/ioctl.c:601 block_ioctl+0xe9/0x130 fs/block_dev.c:1906 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f4293349109 Code: Bad RIP value. RSP: 002b:00007f4291c9d168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f429345c030 RCX: 00007f4293349109 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000007 RBP: 00007f42933a305d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd1be3d1af R14: 00007f4291c9d300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1571: #0: 00000000a4d2fade (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 2 locks held by kworker/u5:8/8221: #0: 000000002755086b ((wq_completion)"knbd%d-recv"nbd->index){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 0000000022d53ad3 ((work_completion)(&args->work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1571 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 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: 9496 Comm: kworker/u4:8 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:iterate_chain_key kernel/locking/lockdep.c:314 [inline] RIP: 0010:__lock_acquire+0x857/0x3ff0 kernel/locking/lockdep.c:3411 Code: 60 0f 85 fd 05 00 00 48 89 da 89 d9 48 c1 ea 20 89 d0 41 29 d0 01 da c1 c0 04 44 31 c0 44 8d 04 10 29 c1 c1 c0 06 48 8b 3c 24 <31> c8 89 c1 29 c2 44 01 c0 c1 c1 08 31 ca 89 d1 41 29 d0 01 c2 c1 RSP: 0018:ffff888052cf7a68 EFLAGS: 00000016 RAX: 0000000014d806dc RBX: 4c395c3f756a1b98 RCX: 000000000516bb7d RDX: 00000000c1a377d7 RSI: ffff8880b4d18988 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000031f6d7f2 R09: 0000000000000002 R10: ffff8880b4d189d8 R11: 0000000000000000 R12: 000000000002002e R13: ffff8880b4d18100 R14: ffff8880b4d189f0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f51f1839000 CR3: 00000000a090d000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:627 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:419 [inline] batadv_nc_worker+0x12d/0xd50 net/batman-adv/network-coding.c:730 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), 1 bytes skipped: 0: 0f 85 fd 05 00 00 jne 0x603 6: 48 89 da mov %rbx,%rdx 9: 89 d9 mov %ebx,%ecx b: 48 c1 ea 20 shr $0x20,%rdx f: 89 d0 mov %edx,%eax 11: 41 29 d0 sub %edx,%r8d 14: 01 da add %ebx,%edx 16: c1 c0 04 rol $0x4,%eax 19: 44 31 c0 xor %r8d,%eax 1c: 44 8d 04 10 lea (%rax,%rdx,1),%r8d 20: 29 c1 sub %eax,%ecx 22: c1 c0 06 rol $0x6,%eax 25: 48 8b 3c 24 mov (%rsp),%rdi * 29: 31 c8 xor %ecx,%eax <-- trapping instruction 2b: 89 c1 mov %eax,%ecx 2d: 29 c2 sub %eax,%edx 2f: 44 01 c0 add %r8d,%eax 32: c1 c1 08 rol $0x8,%ecx 35: 31 ca xor %ecx,%edx 37: 89 d1 mov %edx,%ecx 39: 41 29 d0 sub %edx,%r8d 3c: 01 c2 add %eax,%edx 3e: c1 .byte 0xc1