XFS (loop0): Filesystem has duplicate UUID 984f0b50-42b6-4b06-bc86-cba3e6cc3f80 - can't mount XFS (loop2): Filesystem has duplicate UUID 984f0b50-42b6-4b06-bc86-cba3e6cc3f80 - can't mount XFS (loop0): Filesystem has duplicate UUID 984f0b50-42b6-4b06-bc86-cba3e6cc3f80 - can't mount INFO: task syz-executor3:5957 blocked for more than 122 seconds. Not tainted 5.6.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D26232 5957 4552 0x00004004 Call Trace: context_switch kernel/sched/core.c:3386 [inline] __schedule+0x895/0x1900 kernel/sched/core.c:4082 schedule+0xc0/0x2b0 kernel/sched/core.c:4156 xlog_grant_head_wait+0x123/0x9d0 fs/xfs/xfs_log.c:278 xlog_grant_head_check+0x24d/0x3a0 fs/xfs/xfs_log.c:340 xfs_log_reserve+0x2ea/0xa90 fs/xfs/xfs_log.c:465 xfs_log_write_unmount_record+0x186/0x790 fs/xfs/xfs_log.c:890 xfs_log_unmount_write fs/xfs/xfs_log.c:986 [inline] xfs_log_quiesce+0x3d8/0x490 fs/xfs/xfs_log.c:1049 xfs_log_unmount+0x1a/0xb0 fs/xfs/xfs_log.c:1063 xfs_log_mount_cancel+0x3a/0x50 fs/xfs/xfs_log.c:854 xfs_mountfs+0x1089/0x1a00 fs/xfs/xfs_mount.c:1022 xfs_fc_fill_super+0x726/0xf80 fs/xfs/xfs_super.c:1495 get_tree_bdev+0x404/0x6b0 fs/super.c:1342 xfs_fc_get_tree+0x10/0x20 fs/xfs/xfs_super.c:1539 vfs_get_tree+0x8b/0x2d0 fs/super.c:1547 do_new_mount fs/namespace.c:2822 [inline] do_mount+0x1285/0x1b70 fs/namespace.c:3107 __do_sys_mount fs/namespace.c:3316 [inline] __se_sys_mount fs/namespace.c:3293 [inline] __x64_sys_mount+0x169/0x1c0 fs/namespace.c:3293 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45858a Code: 48 89 ac 24 00 80 00 00 48 8d ac 24 00 80 00 00 48 8b 59 20 48 85 db 75 27 48 c7 c0 00 00 00 00 cc 48 c7 c0 01 00 00 00 cc 48 <8b> ac 24 00 80 00 00 48 81 c4 08 80 00 00 c3 e8 82 d9 ff ff eb 90 RSP: 002b:00007fe9138e0ba8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000040 RCX: 000000000045858a RDX: 0000000020000040 RSI: 0000000020000100 RDI: 00007fe9138e0bf0 RBP: 0000000000000001 R08: 00000000200001c0 R09: 0000000020000040 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000001 R14: 00000000006fed98 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/933: #0: ffffffff8879ed00 (rcu_read_lock){....}, at: debug_show_all_locks+0x5b/0x279 kernel/locking/lockdep.c:5333 1 lock held by rsyslogd/4111: 2 locks held by getty/4201: #0: ffff8881cd6fa090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90000b5a2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1920 drivers/tty/n_tty.c:2156 2 locks held by getty/4202: #0: ffff8881d1407090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90000b622e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1920 drivers/tty/n_tty.c:2156 2 locks held by getty/4203: #0: ffff8881ccde4090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90000b7e2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1920 drivers/tty/n_tty.c:2156 2 locks held by getty/4204: #0: ffff8881ccdf2090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90000b722e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1920 drivers/tty/n_tty.c:2156 2 locks held by getty/4205: #0: ffff8881ccdec090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90000b822e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1920 drivers/tty/n_tty.c:2156 2 locks held by getty/4206: #0: ffff8881cd2cc090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90000b6a2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1920 drivers/tty/n_tty.c:2156 2 locks held by getty/4207: #0: ffff8881d1000090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90000b522e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1920 drivers/tty/n_tty.c:2156 1 lock held by syz-executor3/5957: #0: ffff8881c66e20d8 (&type->s_umount_key#46/1){+.+.}, at: alloc_super+0x134/0x8a0 fs/super.c:229 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 933 Comm: khungtaskd Not tainted 5.6.0-rc1-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+0x12f/0x187 lib/dump_stack.c:118 nmi_cpu_backtrace.cold.8+0x46/0x83 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x160/0x177 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:205 [inline] watchdog+0x624/0xc30 kernel/hung_task.c:289 kthread+0x334/0x3f0 kernel/kthread.c:255 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0x12/0x20 arch/x86/include/asm/irqflags.h:60