INFO: task syz-executor.0:3258 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.0 D26136 3258 8153 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 Bluetooth: hci7: command 0x0419 tx timeout schedule+0x8d/0x1b0 kernel/sched/core.c:3561 xlog_grant_head_wait+0x13b/0xcd0 fs/xfs/xfs_log.c:263 xlog_grant_head_check+0x3c8/0x420 fs/xfs/xfs_log.c:325 xfs_log_reserve+0x347/0xa70 fs/xfs/xfs_log.c:454 xfs_log_write_unmount_record+0x147/0x850 fs/xfs/xfs_log.c:854 XFS (loop3): no log defined XFS (loop3): Internal error xfs_mountfs at line 870 of file fs/xfs/xfs_mount.c. Caller xfs_fs_fill_super+0xd0e/0x1540 fs/xfs/xfs_super.c:1720 CPU: 1 PID: 6058 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 xfs_log_unmount_write fs/xfs/xfs_log.c:953 [inline] xfs_log_quiesce+0x4a4/0x570 fs/xfs/xfs_log.c:1020 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 xfs_error_report fs/xfs/xfs_error.c:319 [inline] xfs_error_report+0xb0/0xc0 fs/xfs/xfs_error.c:306 xfs_mountfs+0x15fa/0x1bf0 fs/xfs/xfs_mount.c:870 xfs_fs_fill_super+0xd0e/0x1540 fs/xfs/xfs_super.c:1720 mount_bdev+0x2fc/0x3b0 fs/super.c:1158 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f45e062662a xfs_mountfs+0x17fe/0x1bf0 fs/xfs/xfs_mount.c:991 Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 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:00007f45deb96f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000000baee RCX: 00007f45e062662a RDX: 000000002000bb00 RSI: 000000002000bb40 RDI: 00007f45deb96fe0 RBP: 00007f45deb97020 R08: 00007f45deb97020 R09: 0000000002000017 R10: 0000000002000017 R11: 0000000000000202 R12: 000000002000bb00 R13: 000000002000bb40 R14: 00007f45deb96fe0 R15: 0000000020000080 xfs_fs_fill_super+0xd0e/0x1540 fs/xfs/xfs_super.c:1720 mount_bdev+0x2fc/0x3b0 fs/super.c:1158 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f7dae64d62a Code: Bad RIP value. RSP: 002b:00007f7dacbbdf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000000baee RCX: 00007f7dae64d62a RDX: 000000002000bb00 RSI: 000000002000bb40 RDI: 00007f7dacbbdfe0 RBP: 00007f7dacbbe020 R08: 00007f7dacbbe020 R09: 0000000002000005 R10: 0000000002000005 R11: 0000000000000202 R12: 000000002000bb00 R13: 000000002000bb40 R14: 00007f7dacbbdfe0 R15: 0000000020000080 Showing all locks held in the system: 1 lock held by khungtaskd/1570: #0: 0000000064f52564 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7806: #0: 000000001f229c55 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 1 lock held by syz-executor.0/3258: #0: 000000009ef37b9d (&type->s_umount_key#56/1){+.+.}, at: alloc_super fs/super.c:226 [inline] #0: 000000009ef37b9d (&type->s_umount_key#56/1){+.+.}, at: sget_userns+0x20b/0xcd0 fs/super.c:519 1 lock held by syz-executor.2/5206: #0: 000000005d608314 (&type->s_umount_key#56/1){+.+.}, at: alloc_super fs/super.c:226 [inline] #0: 000000005d608314 (&type->s_umount_key#56/1){+.+.}, at: sget_userns+0x20b/0xcd0 fs/super.c:519 ============================================= 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 01/21/2023 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: 6104 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 RIP: 0033:0x7fbc56725fb5 Code: d0 c3 4c 89 c2 eb dd 48 83 ec 08 48 83 c7 38 be 01 00 00 00 e8 cc bf 01 00 66 66 2e 0f 1f 84 00 00 00 00 00 90 49 89 f3 41 56 <41> b8 01 00 00 00 31 c9 41 55 49 8b 03 45 31 c9 41 ba 10 00 00 00 RSP: 002b:00007fbc54cfa5f0 EFLAGS: 00000287 RAX: 00000000000b3f94 RBX: 00007fbc54cfa660 RCX: 0000000000000001 RDX: 00000000ffffffff RSI: 00007fbc54cfa660 RDI: 00007fbc54cfa700 RBP: 0000000000000102 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 00007fbc54cfa660 R12: 00007fbc54cfa670 R13: 00007fbc54cfa700 R14: 0000000000000001 R15: 0000000000000000 FS: 00007fbc54cfb700 GS: 0000000000000000