00000050: 00 00 00 01 00 00 10 00 00 00 00 01 00 00 00 00 ................ XFS (loop3): SB validate failed with error -117. 00000060: 00 00 06 c0 b4 a4 02 00 01 00 00 10 00 00 00 00 ................ 00000070: 00 00 00 00 00 00 00 00 0c 09 00 00 00 00 00 00 ................ XFS (loop2): SB validate failed with error -117. INFO: task syz-executor5:5753 blocked for more than 140 seconds. Not tainted 5.0.0-rc1+ #16 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D22632 5753 7396 0x00000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3472 schedule+0xfe/0x350 kernel/sched/core.c:3516 xlog_grant_head_wait+0x24e/0x1120 fs/xfs/xfs_log.c:263 xlog_grant_head_check+0x4cb/0x540 fs/xfs/xfs_log.c:325 xfs_log_reserve+0x399/0xd40 fs/xfs/xfs_log.c:454 xfs_log_write_unmount_record+0x311/0xc00 fs/xfs/xfs_log.c:854 xfs_log_unmount_write fs/xfs/xfs_log.c:953 [inline] xfs_log_quiesce+0x579/0x670 fs/xfs/xfs_log.c:1020 xfs_log_unmount+0x22/0xb0 fs/xfs/xfs_log.c:1034 xfs_log_mount_cancel+0x47/0x60 fs/xfs/xfs_log.c:816 xfs_mountfs+0x1657/0x2190 fs/xfs/xfs_mount.c:1068 xfs_fs_fill_super+0xe36/0x1710 fs/xfs/xfs_super.c:1746 mount_bdev+0x307/0x3c0 fs/super.c:1159 xfs_fs_mount+0x35/0x40 fs/xfs/xfs_super.c:1820 mount_fs+0x123/0x43a fs/super.c:1258 vfs_kern_mount.part.0+0xdb/0x570 fs/namespace.c:959 vfs_kern_mount fs/namespace.c:949 [inline] do_new_mount fs/namespace.c:2513 [inline] do_mount+0x58e/0x3330 fs/namespace.c:2847 ksys_mount+0xdb/0x150 fs/namespace.c:3063 __do_sys_mount fs/namespace.c:3077 [inline] __se_sys_mount fs/namespace.c:3074 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3074 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a93a Code: 4c ff ff ff 48 8d bc 24 10 80 00 00 48 39 3b 75 8c 48 89 23 eb 87 cc cc cc cc cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff ff ff 48 <8b> 71 10 48 81 fe de fa ff ff 0f 84 90 00 00 00 48 8d 84 24 70 03 RSP: 002b:00007f35dfb25a88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f35dfb25b30 RCX: 000000000045a93a RDX: 00007f35dfb25ad0 RSI: 0000000020000100 RDI: 00007f35dfb25af0 RBP: 0000000020000100 R08: 00007f35dfb25b30 R09: 00007f35dfb25ad0 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000003 R13: 0000000000000000 R14: 00000000004db800 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1039: #0: 00000000da608d0d (rcu_read_lock){....}, at: debug_show_all_locks+0xc6/0x41d kernel/locking/lockdep.c:4389 1 lock held by rsyslogd/7254: #0: 00000000b6176633 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1b3/0x1f0 fs/file.c:795 2 locks held by getty/7343: #0: 0000000091ac2532 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000cb32b286 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7344: #0: 0000000040625c92 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000de49520c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7345: #0: 000000005ef88f43 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000007f088ad1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7346: #0: 000000003809ce62 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000015f4a59 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7347: #0: 0000000073741c4c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000fa19aed4 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7348: #0: 0000000030ae9cd3 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000b9b397c7 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7349: #0: 00000000c80243c3 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000c6e8eb17 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 1 lock held by syz-executor5/5753: #0: 00000000a369f3a4 (&type->s_umount_key#70/1){+.+.}, at: alloc_super fs/super.c:227 [inline] #0: 00000000a369f3a4 (&type->s_umount_key#70/1){+.+.}, at: sget_userns+0x2db/0xf50 fs/super.c:520 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1039 Comm: khungtaskd Not tainted 5.0.0-rc1+ #16 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+0x1db/0x2d0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0xbbb/0x1170 kernel/hung_task.c:287 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0x2/0x10 arch/x86/include/asm/irqflags.h:57