BTRFS warning (device ): duplicate device /dev/loop2 devid 1 generation 8 scanned by systemd-udevd (17493) BTRFS info (device loop1): clearing free space tree BTRFS info (device loop1): clearing 1 ro feature flag BTRFS info (device loop1): clearing 2 ro feature flag INFO: task syz-executor.3:13668 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.3 D26136 13668 8154 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 xlog_finish_defer_ops fs/xfs/xfs_log_recover.c:4841 [inline] xlog_recover_process_intents+0x274/0x430 fs/xfs/xfs_log_recover.c:4947 xlog_recover_finish+0x5f/0x230 fs/xfs/xfs_log_recover.c:5839 xfs_log_mount_finish+0x135/0x450 fs/xfs/xfs_log.c:778 xfs_mountfs+0x1032/0x1bf0 fs/xfs/xfs_mount.c:974 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: 0033:0x7fbe815a45fa Code: Bad RIP value. RSP: 002b:00007fbe7fb14f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000000bb2c RCX: 00007fbe815a45fa RDX: 000000002000bb00 RSI: 0000000020000040 RDI: 00007fbe7fb14fe0 RBP: 00007fbe7fb15020 R08: 00007fbe7fb15020 R09: 00000000010000ce R10: 00000000010000ce R11: 0000000000000202 R12: 000000002000bb00 R13: 0000000020000040 R14: 00007fbe7fb14fe0 R15: 0000000020000300 Showing all locks held in the system: 1 lock held by khungtaskd/1570: #0: 00000000bc9c87b9 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7810: #0: 00000000b38cdf88 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 2 locks held by kworker/u4:6/8717: 2 locks held by syz-executor.3/13668: #0: 00000000ece6a56d (&type->s_umount_key#66/1){+.+.}, at: alloc_super fs/super.c:226 [inline] #0: 00000000ece6a56d (&type->s_umount_key#66/1){+.+.}, at: sget_userns+0x20b/0xcd0 fs/super.c:519 #1: 000000001b1f6359 (sb_internal#4){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] #1: 000000001b1f6359 (sb_internal#4){.+.+}, at: xfs_trans_alloc+0x4fc/0x700 fs/xfs/xfs_trans.c:271 1 lock held by syz-executor.3/17004: #0: 00000000ece6a56d (&type->s_umount_key#71){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 17452 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 RIP: 0010:__hrtimer_next_event_base+0x55/0x260 kernel/time/hrtimer.c:525 Code: 84 1b 01 00 00 e8 8b 83 0e 00 89 e8 f3 48 0f bc c0 41 89 c5 0f b3 c5 89 c3 49 83 c5 01 49 c1 e5 07 4d 01 e5 0f 84 f6 00 00 00 <49> 8d 44 24 60 49 bf 00 00 00 00 00 fc ff df 48 89 44 24 10 48 c1 RSP: 0018:ffff8880ba107eb0 EFLAGS: 00000082 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff815401d8 RDX: 0000000000010000 RSI: ffffffff815401e5 RDI: 0000000000000005 RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: ffffffff8c66505b R12: ffff8880ba124cc0 R13: ffff8880ba124d40 R14: 7fffffffffffffff R15: ffff8880ba124d30 FS: 00007faa18782700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3042b000 CR3: 000000004acd0000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __hrtimer_get_next_event kernel/time/hrtimer.c:577 [inline] hrtimer_update_next_event kernel/time/hrtimer.c:602 [inline] hrtimer_interrupt+0x726/0x9e0 kernel/time/hrtimer.c:1588 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:lock_acquire+0x1ec/0x3c0 kernel/locking/lockdep.c:3911 Code: 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 b7 01 00 00 48 83 3d 09 2e a6 08 00 0f 84 2a 01 00 00 48 8b 7c 24 08 57 9d <0f> 1f 44 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 65 8b RSP: 0018:ffff88804becf698 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3051 RBX: ffff8880a2da2040 RCX: 0000000000005828 RDX: dffffc0000000000 RSI: 00000000ab0bfdfc RDI: 0000000000000286 RBP: ffffffff89ff4d00 R08: ffffffff8cd43680 R09: 0000000000000002 R10: ffff8880a2da2918 R11: 00000000db3becf5 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 __fs_reclaim_acquire mm/page_alloc.c:3759 [inline] fs_reclaim_acquire+0x105/0x130 mm/page_alloc.c:3770 slab_pre_alloc_hook mm/slab.h:419 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x4f/0x3c0 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] kzalloc include/linux/slab.h:709 [inline] __alloc_workqueue_key+0x789/0xed0 kernel/workqueue.c:4098 __btrfs_alloc_workqueue+0x40c/0x6c0 fs/btrfs/async-thread.c:146 btrfs_alloc_workqueue+0x7b/0x490 fs/btrfs/async-thread.c:175 scrub_workers_get+0x117/0x2d0 fs/btrfs/scrub.c:3758 btrfs_scrub_dev+0x4ea/0xfd0 fs/btrfs/scrub.c:3876 btrfs_ioctl_scrub fs/btrfs/ioctl.c:4731 [inline] btrfs_ioctl+0x121f/0x76d0 fs/btrfs/ioctl.c:5995 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7faa1a2100c9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007faa18782168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007faa1a32ff80 RCX: 00007faa1a2100c9 RDX: 0000000020000100 RSI: 00000000c400941b RDI: 000000000000000c RBP: 00007faa1a26bae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd9f496f2f R14: 00007faa18782300 R15: 0000000000022000