IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready Bluetooth: hci7 command 0x041b tx timeout Bluetooth: hci7 command 0x040f tx timeout Bluetooth: hci7 command 0x0419 tx timeout INFO: task syz-executor.2:9982 blocked for more than 140 seconds. Not tainted 4.14.295-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D30296 9982 7995 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x1e6/0x350 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:66 [inline] down_read+0x44/0x80 kernel/locking/rwsem.c:26 __get_super.part.0+0x271/0x390 fs/super.c:678 __get_super include/linux/spinlock.h:317 [inline] get_super+0x2b/0x50 fs/super.c:707 fsync_bdev+0x14/0xc0 fs/block_dev.c:495 blkdev_flushbuf block/ioctl.c:430 [inline] blkdev_ioctl+0x883/0x1830 block/ioctl.c:514 block_ioctl+0xd9/0x120 fs/block_dev.c:1893 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f7506dc85a9 RSP: 002b:00007f750571a168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f7506ee9050 RCX: 00007f7506dc85a9 RDX: 0000000000000000 RSI: 0000000000001261 RDI: 0000000000000003 RBP: 00007f7506e23580 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc35f8b51f R14: 00007f750571a300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1534: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 1 lock held by syz-executor.2/9982: #0: (&type->s_umount_key#65){++++}, at: [] __get_super.part.0+0x271/0x390 fs/super.c:678 2 locks held by syz-executor.2/10359: #0: (&bdev->bd_fsfreeze_mutex){+.+.}, at: [] mount_bdev+0x71/0x360 fs/super.c:1101 #1: (&type->s_umount_key#65){++++}, at: [] grab_super+0x55/0x140 fs/super.c:373 1 lock held by syz-executor.2/10361: #0: (&type->s_umount_key#65){++++}, at: [] __get_super.part.0+0x271/0x390 fs/super.c:678 1 lock held by syz-executor.2/10661: #0: (&bdev->bd_fsfreeze_mutex){+.+.}, at: [] mount_bdev+0x71/0x360 fs/super.c:1101 1 lock held by syz-executor.2/10663: #0: (&type->s_umount_key#65){++++}, at: [] __get_super.part.0+0x271/0x390 fs/super.c:678 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1534 Comm: khungtaskd Not tainted 4.14.295-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x13a/0x180 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x5b9/0xb40 kernel/hung_task.c:274 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 7721 Comm: rs:main Q:Reg Not tainted 4.14.295-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 task: ffff8880a0ebe380 task.stack: ffff88809f520000 RIP: 0010:match_held_lock kernel/locking/lockdep.c:3562 [inline] RIP: 0010:__lock_is_held+0x74/0x160 kernel/locking/lockdep.c:3818 RSP: 0018:ffff88809f527720 EFLAGS: 00000802 RAX: 1ffff110141d7d8a RBX: ffff8880a0ebec30 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff8880a0ebec52 RBP: 0000000000000001 R08: ffff888234d04640 R09: 00000000000404d7 R10: ffff8880a0ebeca8 R11: ffff8880a0ebe380 R12: ffff8880a0ebec08 R13: dffffc0000000000 R14: ffffffff88f78180 R15: ffff8880a0ebe380 FS: 00007fc58d971700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe728319000 CR3: 000000008ffe8000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_is_held_type+0x10d/0x210 kernel/locking/lockdep.c:4036 lock_is_held include/linux/lockdep.h:437 [inline] rcu_read_lock_sched_held+0x16c/0x1d0 kernel/rcu/update.c:116 trace_ext4_da_reserve_space include/trace/events/ext4.h:1199 [inline] ext4_da_reserve_space fs/ext4/inode.c:1618 [inline] ext4_da_map_blocks fs/ext4/inode.c:1906 [inline] ext4_da_get_block_prep+0xc62/0xfc0 fs/ext4/inode.c:1979 __block_write_begin_int+0x35c/0x11d0 fs/buffer.c:2038 ext4_da_write_begin+0x402/0xe70 fs/ext4/inode.c:3148 generic_perform_write+0x1c9/0x420 mm/filemap.c:3055 __generic_file_write_iter+0x227/0x590 mm/filemap.c:3180 ext4_file_write_iter+0x276/0xd20 fs/ext4/file.c:270 call_write_iter include/linux/fs.h:1780 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x44c/0x630 fs/read_write.c:482 vfs_write+0x17f/0x4d0 fs/read_write.c:544 SYSC_write fs/read_write.c:590 [inline] SyS_write+0xf2/0x210 fs/read_write.c:582 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7fc5903b51cd RSP: 002b:00007fc58d970590 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fc584021360 RCX: 00007fc5903b51cd RDX: 00000000000004a6 RSI: 00007fc584021360 RDI: 0000000000000006 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00007fc5840210e0 R13: 00007fc58d9705b0 R14: 000056523c16a360 R15: 00000000000004a6 Code: 80 08 00 00 31 ed 49 bd 00 00 00 00 00 fc ff df 4d 8d a7 88 08 00 00 85 c0 7f 4d e9 b8 00 00 00 48 8d 7b 22 48 89 f8 48 c1 e8 03 <42> 0f b6 14 28 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f