BTRFS info (device loop4): has skinny extents
F2FS-fs (loop0): Mounted with checkpoint version = 48b305e5
attempt to access beyond end of device
loop0: rw=2049, want=45104, limit=40427
======================================================
WARNING: possible circular locking dependency detected
4.14.307-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.4/10077 is trying to acquire lock:
("%s-%s""btrfs", name){+.+.}, at: [<ffffffff8135cb4b>] flush_workqueue+0xcb/0x1310 kernel/workqueue.c:2622
but task is already holding lock:
(&fs_info->scrub_lock){+.+.}, at: [<ffffffff82b1bdb6>] 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.4/10077:
#0: (&fs_info->scrub_lock){+.+.}, at: [<ffffffff82b1bdb6>] btrfs_scrub_dev+0x506/0xcd0 fs/btrfs/scrub.c:4217
stack backtrace:
CPU: 1 PID: 10077 Comm: syz-executor.4 Not tainted 4.14.307-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
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: 0033:0x7f33569cb0f9
RSP: 002b:00007f3354f3d168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f3356aeaf80 RCX: 00007f33569cb0f9
RDX: 0000000020000100 RSI: 00000000c400941b RDI: 0000000000000004
RBP: 00007f3356a26ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdc489296f R14: 00007f3354f3d300 R15: 0000000000022000
syz-executor.4 (10077) used greatest stack depth: 25496 bytes left
F2FS-fs (loop0): Found nat_bits in checkpoint
BTRFS info (device loop4): enabling inode map caching
BTRFS info (device loop4): trying to use backup root at mount time
F2FS-fs (loop0): Mounted with checkpoint version = 48b305e5
BTRFS info (device loop4): use zlib compression
BTRFS info (device loop4): enabling ssd optimizations
BTRFS info (device loop4): using spread ssd allocation scheme
BTRFS info (device loop4): using free space tree
BTRFS info (device loop4): has skinny extents
attempt to access beyond end of device
loop0: rw=2049, want=45104, limit=40427
BTRFS info (device loop4): enabling inode map caching
BTRFS info (device loop4): trying to use backup root at mount time
BTRFS info (device loop4): use zlib compression
BTRFS info (device loop4): enabling ssd optimizations
BTRFS info (device loop4): using spread ssd allocation scheme
BTRFS info (device loop4): using free space tree
BTRFS info (device loop4): has skinny extents
F2FS-fs (loop0): Found nat_bits in checkpoint
F2FS-fs (loop0): Mounted with checkpoint version = 48b305e5
attempt to access beyond end of device
loop0: rw=2049, want=45104, limit=40427
audit: type=1800 audit(1677694430.748:6): pid=10347 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="file0" dev="sda1" ino=13987 res=0
BTRFS info (device loop4): enabling inode map caching
BTRFS info (device loop4): trying to use backup root at mount time
BTRFS info (device loop4): use zlib compression
BTRFS info (device loop4): enabling ssd optimizations
BTRFS info (device loop4): using spread ssd allocation scheme
BTRFS info (device loop4): using free space tree
BTRFS info (device loop4): has skinny extents
audit: type=1800 audit(1677694431.098:7): pid=10419 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.3" name="file0" dev="sda1" ino=14027 res=0
audit: type=1800 audit(1677694431.118:8): pid=10424 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="file0" dev="sda1" ino=14027 res=0
audit: type=1800 audit(1677694431.128:9): pid=10425 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.3" name="file0" dev="sda1" ino=13975 res=0
XFS (loop3): Superblock has unknown read-only compatible features (0x8) enabled.
XFS (loop3): Attempted to mount read-only compatible filesystem read-write.
XFS (loop3): Filesystem can only be safely mounted read only.
XFS (loop3): SB validate failed with error -22.
audit: type=1800 audit(1677694431.458:10): pid=10494 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="file0" dev="sda1" ino=14036 res=0
audit: type=1800 audit(1677694432.128:11): pid=10527 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.0" name="file0" dev="sda1" ino=13885 res=0
audit: type=1800 audit(1677694433.048:12): pid=10602 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="file0" dev="sda1" ino=14073 res=0
audit: type=1800 audit(1677694433.078:13): pid=10605 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="file0" dev="sda1" ino=14066 res=0
audit: type=1800 audit(1677694433.818:14): pid=10643 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.0" name="file0" dev="sda1" ino=14070 res=0
audit: type=1800 audit(1677694434.038:15): pid=10700 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="file0" dev="sda1" ino=14059 res=0
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
audit: type=1800 audit(1677694434.918:16): pid=10743 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="file0" dev="sda1" ino=14057 res=0
audit: type=1800 audit(1677694435.878:17): pid=10834 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.3" name="file0" dev="sda1" ino=13880 res=0
audit: type=1800 audit(1677694435.928:18): pid=10847 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="file0" dev="sda1" ino=14089 res=0
audit: type=1800 audit(1677694435.958:19): pid=10859 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=14056 res=0
audit: type=1800 audit(1677694436.818:20): pid=10914 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="file0" dev="sda1" ino=14093 res=0
audit: type=1800 audit(1677694437.729:21): pid=10967 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="file0" dev="sda1" ino=14061 res=0
overlayfs: missing 'lowerdir'