EXT4-fs (loop4): 1 orphan inode deleted EXT4-fs (loop4): mounted filesystem without journal. Opts: errors=remount-ro,sysvgroups,dioread_lock,resuid=0x0000000000000000,data_err=abort,noload,max_dir_size_kb=0x0000000000200006,init_itable=0x0000000000010001,usrquota, ====================================================== WARNING: possible circular locking dependency detected 4.14.306-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.2/11880 is trying to acquire lock: ("%s-%s""btrfs", name){+.+.}, at: [] flush_workqueue+0xcb/0x1310 kernel/workqueue.c:2622 but task is already holding lock: (&fs_info->scrub_lock){+.+.}, at: [] btrfs_scrub_dev+0x506/0xcd0 fs/btrfs/scrub.c:4217 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&fs_info->scrub_lock){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 btrfs_scrub_dev+0x1f3/0xcd0 fs/btrfs/scrub.c:4150 btrfs_ioctl_scrub fs/btrfs/ioctl.c:4451 [inline] btrfs_ioctl+0xba8/0x5b20 fs/btrfs/ioctl.c:5681 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 -> #2 (&fs_devs->device_list_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 __reada_start_machine fs/btrfs/reada.c:765 [inline] reada_start_machine_worker+0x1d2/0xa90 fs/btrfs/reada.c:746 normal_work_helper+0x304/0x1330 fs/btrfs/async-thread.c:376 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 -> #1 ((&work->normal_work)){+.+.}: process_one_work+0x736/0x14a0 kernel/workqueue.c:2093 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 -> #0 ("%s-%s""btrfs", name){+.+.}: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 flush_workqueue+0xfa/0x1310 kernel/workqueue.c:2625 drain_workqueue+0x177/0x3e0 kernel/workqueue.c:2790 destroy_workqueue+0x71/0x710 kernel/workqueue.c:4116 __btrfs_destroy_workqueue fs/btrfs/async-thread.c:436 [inline] btrfs_destroy_workqueue+0xf8/0x630 fs/btrfs/async-thread.c:447 scrub_workers_put+0x90/0x1a0 fs/btrfs/scrub.c:4075 btrfs_scrub_dev+0x536/0xcd0 fs/btrfs/scrub.c:4219 btrfs_ioctl_scrub fs/btrfs/ioctl.c:4451 [inline] btrfs_ioctl+0xba8/0x5b20 fs/btrfs/ioctl.c:5681 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 other info that might help us debug this: Chain exists of: "%s-%s""btrfs", name --> &fs_devs->device_list_mutex --> &fs_info->scrub_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&fs_info->scrub_lock); lock(&fs_devs->device_list_mutex); lock(&fs_info->scrub_lock); lock("%s-%s""btrfs", name); *** DEADLOCK *** 1 lock held by syz-executor.2/11880: #0: (&fs_info->scrub_lock){+.+.}, at: [] btrfs_scrub_dev+0x506/0xcd0 fs/btrfs/scrub.c:4217 stack backtrace: CPU: 1 PID: 11880 Comm: syz-executor.2 Not tainted 4.14.306-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1258 check_prev_add kernel/locking/lockdep.c:1905 [inline] check_prevs_add kernel/locking/lockdep.c:2022 [inline] validate_chain kernel/locking/lockdep.c:2464 [inline] __lock_acquire+0x2e0e/0x3f20 kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 flush_workqueue+0xfa/0x1310 kernel/workqueue.c:2625 drain_workqueue+0x177/0x3e0 kernel/workqueue.c:2790 destroy_workqueue+0x71/0x710 kernel/workqueue.c:4116 __btrfs_destroy_workqueue fs/btrfs/async-thread.c:436 [inline] btrfs_destroy_workqueue+0xf8/0x630 fs/btrfs/async-thread.c:447 scrub_workers_put+0x90/0x1a0 fs/btrfs/scrub.c:4075 btrfs_scrub_dev+0x536/0xcd0 fs/btrfs/scrub.c:4219 btrfs_ioctl_scrub fs/btrfs/ioctl.c:4451 [inline] btrfs_ioctl+0xba8/0x5b20 fs/btrfs/ioctl.c:5681 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f465e5090f9 RSP: 002b:00007f465ca7b168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f465e628f80 RCX: 00007f465e5090f9 RDX: 0000000020000100 RSI: 00000000c400941b RDI: 0000000000000004 RBP: 00007f465e564ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe39cf8e4f R14: 00007f465ca7b300 R15: 0000000000022000 kauditd_printk_skb: 9 callbacks suppressed audit: type=1800 audit(1677156834.342:13): pid=12017 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="file0" dev="sda1" ino=14253 res=0 EXT4-fs error (device loop4): mb_free_blocks:1464: group 0, inode 16: block 39:freeing already freed block (bit 39); block bitmap corrupt. EXT4-fs (loop4): Remounting filesystem read-only audit: type=1804 audit(1677156834.362:14): pid=12017 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir3308352048/syzkaller.UZKMmU/62/file0" dev="sda1" ino=14253 res=1 EXT4-fs error (device loop4): ext4_mb_generate_buddy:754: group 0, block bitmap and bg descriptor inconsistent: 42 vs 43 free clusters audit: type=1804 audit(1677156834.362:15): pid=12017 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.5" name="/root/syzkaller-testdir3308352048/syzkaller.UZKMmU/62/file0" dev="sda1" ino=14253 res=1 Quota error (device loop4): dqput: Can't write quota structure (error -30). Quota may get out of sync! Quota error (device loop4): dqput: Can't write quota structure (error -30). Quota may get out of sync! EXT4-fs (loop4): 1 orphan inode deleted BTRFS info (device loop0): enabling inode map caching BTRFS info (device loop0): trying to use backup root at mount time EXT4-fs (loop4): mounted filesystem without journal. Opts: errors=remount-ro,sysvgroups,dioread_lock,resuid=0x0000000000000000,data_err=abort,noload,max_dir_size_kb=0x0000000000200006,init_itable=0x0000000000010001,usrquota, BTRFS info (device loop0): use zlib compression BTRFS info (device loop0): enabling ssd optimizations BTRFS info (device loop0): using spread ssd allocation scheme BTRFS info (device loop0): using free space tree BTRFS info (device loop0): has skinny extents audit: type=1800 audit(1677156835.212:16): pid=12092 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="file0" dev="sda1" ino=14253 res=0 audit: type=1804 audit(1677156835.232:17): pid=12092 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir3308352048/syzkaller.UZKMmU/63/file0" dev="sda1" ino=14253 res=1 audit: type=1804 audit(1677156835.232:18): pid=12092 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.5" name="/root/syzkaller-testdir3308352048/syzkaller.UZKMmU/63/file0" dev="sda1" ino=14253 res=1 BTRFS info (device loop0): enabling inode map caching BTRFS info (device loop0): trying to use backup root at mount time BTRFS info (device loop0): use zlib compression BTRFS info (device loop0): enabling ssd optimizations BTRFS info (device loop0): using spread ssd allocation scheme BTRFS info (device loop0): using free space tree BTRFS info (device loop0): has skinny extents audit: type=1800 audit(1677156836.092:19): pid=12155 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="file0" dev="sda1" ino=14246 res=0 audit: type=1804 audit(1677156836.102:20): pid=12155 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir3308352048/syzkaller.UZKMmU/64/file0" dev="sda1" ino=14246 res=1 BTRFS info (device loop0): enabling inode map caching BTRFS info (device loop0): trying to use backup root at mount time BTRFS info (device loop0): use zlib compression BTRFS info (device loop0): enabling ssd optimizations BTRFS info (device loop0): using spread ssd allocation scheme BTRFS info (device loop0): using free space tree BTRFS info (device loop0): has skinny extents kauditd_printk_skb: 16 callbacks suppressed audit: type=1800 audit(1677156839.143:37): pid=12301 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="file0" dev="sda1" ino=14021 res=0 audit: type=1804 audit(1677156839.143:38): pid=12301 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir2058402763/syzkaller.IF9qDv/61/file0" dev="sda1" ino=14021 res=1 audit: type=1804 audit(1677156839.143:39): pid=12301 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.2" name="/root/syzkaller-testdir2058402763/syzkaller.IF9qDv/61/file0" dev="sda1" ino=14021 res=1 audit: type=1800 audit(1677156839.363:40): pid=12299 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.0" name="file0" dev="sda1" ino=14261 res=0 audit: type=1804 audit(1677156839.373:41): pid=12299 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir1924649566/syzkaller.jMc3yt/86/file0" dev="sda1" ino=14261 res=1 audit: type=1804 audit(1677156839.373:42): pid=12299 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.0" name="/root/syzkaller-testdir1924649566/syzkaller.jMc3yt/86/file0" dev="sda1" ino=14261 res=1 BTRFS info (device loop0): enabling inode map caching BTRFS warning (device loop0): excessive commit interval 622039222 audit: type=1800 audit(1677156839.923:43): pid=12312 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="file0" dev="sda1" ino=13907 res=0 BTRFS info (device loop0): force zlib compression BTRFS info (device loop0): using free space tree BTRFS info (device loop0): has skinny extents ====================================================== WARNING: the mand mount option is being deprecated and will be removed in v5.15! ====================================================== audit: type=1804 audit(1677156839.923:44): pid=12312 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir3308352048/syzkaller.UZKMmU/67/file0" dev="sda1" ino=13907 res=1 audit: type=1804 audit(1677156839.923:45): pid=12312 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.5" name="/root/syzkaller-testdir3308352048/syzkaller.UZKMmU/67/file0" dev="sda1" ino=13907 res=1 audit: type=1800 audit(1677156839.923:46): pid=12315 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.3" name="file0" dev="sda1" ino=13908 res=0 BTRFS info (device loop0): enabling inode map caching BTRFS warning (device loop0): excessive commit interval 622039222 BTRFS info (device loop0): force zlib compression BTRFS info (device loop0): using free space tree BTRFS info (device loop0): has skinny extents BTRFS info (device loop0): enabling inode map caching BTRFS warning (device loop0): excessive commit interval 622039222 BTRFS info (device loop0): force zlib compression BTRFS info (device loop0): using free space tree BTRFS info (device loop0): has skinny extents