XFS (loop4): Unmounting Filesystem XFS (loop3): invalid logbufs value: 1 [not 2-8] INFO: task syz-executor.1:26618 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 D26136 26618 10156 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 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_trans_reserve+0x63a/0x9c0 fs/xfs/xfs_trans.c:197 xfs_trans_alloc+0x2f7/0x700 fs/xfs/xfs_trans.c:289 xfs_qm_qino_alloc+0x19a/0x950 fs/xfs/xfs_qm.c:777 xfs_qm_init_quotainos+0x563/0x730 fs/xfs/xfs_qm.c:1548 xfs_qm_init_quotainfo+0x146/0xd70 fs/xfs/xfs_qm.c:659 xfs_qm_mount_quotas+0x55/0x680 fs/xfs/xfs_qm.c:1432 xfs_mountfs+0x17e2/0x1bf0 fs/xfs/xfs_mount.c:1001 XFS (loop4): DAX enabled. Warning: EXPERIMENTAL, use at your own risk XFS (loop4): DAX unsupported by block device. Turning off DAX. xfs_fs_fill_super+0xd0e/0x1540 fs/xfs/xfs_super.c:1720 XFS (loop4): Mounting V4 Filesystem mount_bdev+0x2fc/0x3b0 fs/super.c:1158 mount_fs+0xa3/0x310 fs/super.c:1261 XFS (loop4): Ending clean mount vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 XFS (loop4): Quotacheck needed: Please wait. vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 XFS (loop4): Quotacheck: Done. XFS (loop5): DAX enabled. Warning: EXPERIMENTAL, use at your own risk XFS (loop5): DAX unsupported by block device. Turning off DAX. ksys_mount+0xcf/0x130 fs/namespace.c:3038 XFS (loop5): Mounting V4 Filesystem __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 XFS (loop5): Ending clean mount XFS (loop5): Quotacheck needed: Please wait. RIP: 0033:0x7f83c257b62a Code: Bad RIP value. XFS (loop5): Quotacheck: Done. RSP: 002b:00007f83c0aebf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000000baed RCX: 00007f83c257b62a RDX: 000000002000bb00 RSI: 0000000020000040 RDI: 00007f83c0aebfe0 RBP: 00007f83c0aec020 R08: 00007f83c0aec020 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 000000002000bb00 R13: 0000000020000040 R14: 00007f83c0aebfe0 R15: 0000000020000000 Showing all locks held in the system: XFS (loop5): Unmounting Filesystem XFS (loop4): Unmounting Filesystem 1 lock held by khungtaskd/1570: #0: 00000000773de9b7 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 2 locks held by systemd-udevd/4696: #0: 00000000c64e97c0 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x1d0/0x1480 fs/block_dev.c:1478 #1: 00000000773de9b7 (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #1: 00000000773de9b7 (rcu_read_lock){....}, at: update_curr+0x2c3/0x870 kernel/sched/fair.c:857 1 lock held by in:imklog/7774: #0: 00000000cf5b1d29 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 3 locks held by kworker/u4:2/31008: 2 locks held by syz-executor.1/26618: #0: 000000002c7f8a9b (&type->s_umount_key#49/1){+.+.}, at: alloc_super fs/super.c:226 [inline] #0: 000000002c7f8a9b (&type->s_umount_key#49/1){+.+.}, at: sget_userns+0x20b/0xcd0 fs/super.c:519 #1: 00000000e1182cfe (sb_internal#3){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] #1: 00000000e1182cfe (sb_internal#3){.+.+}, at: xfs_trans_alloc+0x4fc/0x700 fs/xfs/xfs_trans.c:271 2 locks held by syz-executor.1/30077: ============================================= 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 02/16/2023 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: 30096 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 RIP: 0033:0x7ffaf02111cc Code: 01 c2 49 3b 55 08 77 56 8d 55 ff 85 ed 74 35 0f 1f 80 00 00 00 00 48 39 c1 77 1c 49 8b 75 00 49 89 c1 49 29 c9 46 0f b6 0c 0e <45> 84 c9 74 08 44 88 0c 06 49 8b 45 10 48 83 c0 01 49 89 45 10 83 RSP: 002b:00007ffaee7e5600 EFLAGS: 00000202 RAX: 0000000000c81616 RBX: 00007ffaee7e5660 RCX: 0000000000000001 RDX: 000000000000003d RSI: 00007ffae63c6000 RDI: 00007ffaee7e5700 RBP: 0000000000000102 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 00007ffaee7e5670 R12: 00007ffaee7e5670 R13: 00007ffaee7e5700 R14: 0000000000000001 R15: 0000000000000000 FS: 00007ffaee7e6700 GS: 0000000000000000