FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
======================================================
WARNING: possible circular locking dependency detected
4.19.211-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.3/11862 is trying to acquire lock:
000000001fa024c6 ((wq_completion)"dio/%s"sb->s_id){+.+.}, at: flush_workqueue+0xe8/0x13e0 kernel/workqueue.c:2658
but task is already holding lock:
00000000c4b02e77 (&sb->s_type->i_mutex_key#22){++++}, at: inode_lock include/linux/fs.h:748 [inline]
00000000c4b02e77 (&sb->s_type->i_mutex_key#22){++++}, at: generic_file_write_iter+0x99/0x730 mm/filemap.c:3320
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&sb->s_type->i_mutex_key#22){++++}:
inode_lock include/linux/fs.h:748 [inline]
__generic_file_fsync+0xb0/0x1f0 fs/libfs.c:989
fat_file_fsync+0x73/0x200 fs/fat/file.c:198
vfs_fsync_range+0x13a/0x220 fs/sync.c:197
generic_write_sync include/linux/fs.h:2750 [inline]
dio_complete+0x763/0xac0 fs/direct-io.c:329
process_one_work+0x864/0x1570 kernel/workqueue.c:2153
worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
-> #1 ((work_completion)(&dio->complete_work)){+.+.}:
worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
-> #0 ((wq_completion)"dio/%s"sb->s_id){+.+.}:
flush_workqueue+0x117/0x13e0 kernel/workqueue.c:2661
drain_workqueue+0x1a5/0x460 kernel/workqueue.c:2826
destroy_workqueue+0x75/0x790 kernel/workqueue.c:4183
__alloc_workqueue_key+0xb76/0xed0 kernel/workqueue.c:4160
sb_init_dio_done_wq+0x34/0x90 fs/direct-io.c:623
do_blockdev_direct_IO fs/direct-io.c:1285 [inline]
__blockdev_direct_IO+0x5f55/0xef40 fs/direct-io.c:1419
blockdev_direct_IO include/linux/fs.h:3059 [inline]
fat_direct_IO+0x1d1/0x370 fs/fat/inode.c:282
generic_file_direct_write+0x208/0x4a0 mm/filemap.c:3073
__generic_file_write_iter+0x2d0/0x610 mm/filemap.c:3252
generic_file_write_iter+0x3f8/0x730 mm/filemap.c:3323
call_write_iter include/linux/fs.h:1821 [inline]
aio_write+0x37f/0x5c0 fs/aio.c:1574
__io_submit_one fs/aio.c:1858 [inline]
io_submit_one+0xecd/0x20c0 fs/aio.c:1909
__do_sys_io_submit fs/aio.c:1953 [inline]
__se_sys_io_submit+0x11b/0x4a0 fs/aio.c:1924
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
other info that might help us debug this:
Chain exists of:
(wq_completion)"dio/%s"sb->s_id --> (work_completion)(&dio->complete_work) --> &sb->s_type->i_mutex_key#22
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&sb->s_type->i_mutex_key#22);
lock((work_completion)(&dio->complete_work));
lock(&sb->s_type->i_mutex_key#22);
lock((wq_completion)"dio/%s"sb->s_id);
*** DEADLOCK ***
1 lock held by syz-executor.3/11862:
#0: 00000000c4b02e77 (&sb->s_type->i_mutex_key#22){++++}, at: inode_lock include/linux/fs.h:748 [inline]
#0: 00000000c4b02e77 (&sb->s_type->i_mutex_key#22){++++}, at: generic_file_write_iter+0x99/0x730 mm/filemap.c:3320
stack backtrace:
CPU: 0 PID: 11862 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1222
check_prev_add kernel/locking/lockdep.c:1866 [inline]
check_prevs_add kernel/locking/lockdep.c:1979 [inline]
validate_chain kernel/locking/lockdep.c:2420 [inline]
__lock_acquire+0x30c9/0x3ff0 kernel/locking/lockdep.c:3416
lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908
flush_workqueue+0x117/0x13e0 kernel/workqueue.c:2661
drain_workqueue+0x1a5/0x460 kernel/workqueue.c:2826
destroy_workqueue+0x75/0x790 kernel/workqueue.c:4183
__alloc_workqueue_key+0xb76/0xed0 kernel/workqueue.c:4160
sb_init_dio_done_wq+0x34/0x90 fs/direct-io.c:623
do_blockdev_direct_IO fs/direct-io.c:1285 [inline]
__blockdev_direct_IO+0x5f55/0xef40 fs/direct-io.c:1419
blockdev_direct_IO include/linux/fs.h:3059 [inline]
fat_direct_IO+0x1d1/0x370 fs/fat/inode.c:282
generic_file_direct_write+0x208/0x4a0 mm/filemap.c:3073
__generic_file_write_iter+0x2d0/0x610 mm/filemap.c:3252
generic_file_write_iter+0x3f8/0x730 mm/filemap.c:3323
call_write_iter include/linux/fs.h:1821 [inline]
aio_write+0x37f/0x5c0 fs/aio.c:1574
__io_submit_one fs/aio.c:1858 [inline]
io_submit_one+0xecd/0x20c0 fs/aio.c:1909
__do_sys_io_submit fs/aio.c:1953 [inline]
__se_sys_io_submit+0x11b/0x4a0 fs/aio.c:1924
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fbc3b40e409
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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:00007fbc39d83168 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1
RAX: ffffffffffffffda RBX: 00007fbc3b520f80 RCX: 00007fbc3b40e409
RDX: 0000000020000540 RSI: 0000000000001801 RDI: 00007fbc3b4fc000
RBP: 00007fbc3b469367 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffff1f9938f R14: 00007fbc39d83300 R15: 0000000000022000
caif:caif_disconnect_client(): nothing to disconnect
FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
audit: type=1804 audit(1663513138.947:4): pid=12090 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir1918641061/syzkaller.B0bE0m/115/bus" dev="sda1" ino=14110 res=1
xt_ecn: cannot match TCP bits for non-tcp packets
xt_ecn: cannot match TCP bits for non-tcp packets
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
xt_ecn: cannot match TCP bits for non-tcp packets
overlayfs: failed to resolve './file1': -2
audit: type=1804 audit(1663513139.727:5): pid=12190 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir1918641061/syzkaller.B0bE0m/116/bus" dev="sda1" ino=14123 res=1
overlayfs: failed to resolve './file1': -2
audit: type=1804 audit(1663513139.727:6): pid=12190 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir1918641061/syzkaller.B0bE0m/116/bus" dev="sda1" ino=14123 res=1
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
audit: type=1804 audit(1663513139.727:7): pid=12190 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir1918641061/syzkaller.B0bE0m/116/bus" dev="sda1" ino=14123 res=1
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
audit: type=1804 audit(1663513139.727:8): pid=12190 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir1918641061/syzkaller.B0bE0m/116/bus" dev="sda1" ino=14123 res=1
overlayfs: failed to resolve './file1': -2
overlayfs: failed to resolve './file1': -2
audit: type=1804 audit(1663513139.727:9): pid=12190 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir1918641061/syzkaller.B0bE0m/116/bus" dev="sda1" ino=14123 res=1
overlayfs: failed to resolve './file1': -2
audit: type=1804 audit(1663513139.727:10): pid=12190 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir1918641061/syzkaller.B0bE0m/116/bus" dev="sda1" ino=14123 res=1
audit: type=1804 audit(1663513139.727:11): pid=12190 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir1918641061/syzkaller.B0bE0m/116/bus" dev="sda1" ino=14123 res=1
overlayfs: failed to resolve './file1': -2
audit: type=1804 audit(1663513139.727:12): pid=12190 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir1918641061/syzkaller.B0bE0m/116/bus" dev="sda1" ino=14123 res=1
audit: type=1804 audit(1663513139.727:13): pid=12190 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir1918641061/syzkaller.B0bE0m/116/bus" dev="sda1" ino=14123 res=1
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.0'.
EXT4-fs (loop1): bad s_want_extra_isize: 42510
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.0'.
EXT4-fs (loop1): bad s_want_extra_isize: 42510
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
EXT4-fs (loop1): bad s_want_extra_isize: 42510
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.0'.
x_tables: duplicate underflow at hook 1
xt_CT: You must specify a L4 protocol and not use inversions on it
xt_CT: You must specify a L4 protocol and not use inversions on it
IPVS: ftp: loaded support on port[0] = 21
xt_CT: You must specify a L4 protocol and not use inversions on it
x_tables: duplicate underflow at hook 1
xt_CT: You must specify a L4 protocol and not use inversions on it
BTRFS: device fsid f90cac8b-044b-4fa8-8bee-4b8d3da88dc2 devid 1 transid 7 /dev/loop0
x_tables: duplicate underflow at hook 1
BTRFS info (device loop0): disk space caching is enabled
BTRFS info (device loop0): has skinny extents
nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead.
BTRFS error (device loop0): bad tree block start, want 5242880 have 0
BTRFS warning (device loop0): failed to read tree root
BTRFS error (device loop0): open_ctree failed
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'.
BTRFS info (device loop0): disk space caching is enabled
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): bad tree block start, want 5242880 have 0
BTRFS warning (device loop0): failed to read tree root
BTRFS error (device loop0): open_ctree failed
syz-executor.5 (12679) used greatest stack depth: 23088 bytes left
BTRFS info (device loop0): unrecognized mount option '_�ݷ�'
BTRFS error (device loop0): open_ctree failed
BTRFS info (device loop0): unrecognized mount option '_�ݷ�'
BTRFS error (device loop0): open_ctree failed
BTRFS info (device loop0): unrecognized mount option '_�ݷ�'
BTRFS error (device loop0): open_ctree failed
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'.
BTRFS info (device loop0): unrecognized mount option '_�ݷ�'
BTRFS error (device loop0): open_ctree failed
BTRFS info (device loop0): unrecognized mount option '_�ݷ�'
BTRFS error (device loop0): open_ctree failed
BTRFS info (device loop0): unrecognized mount option '_�ݷ�'
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'.
BTRFS error (device loop0): open_ctree failed
BTRFS info (device loop0): disk space caching is enabled
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): open_ctree failed
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'.
BTRFS info (device loop0): disk space caching is enabled
BTRFS info (device loop0): has skinny extents
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'.
IPVS: ftp: loaded support on port[0] = 21
BTRFS error (device loop0): bad tree block start, want 5242880 have 0
BTRFS warning (device loop0): failed to read tree root
BTRFS error (device loop0): open_ctree failed
REISERFS warning (device loop4): super-6514 reiserfs_parse_options: unknown quota format specified.
squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop4
overlayfs: unrecognized mount option "upper@" or missing value
IPVS: ftp: loaded support on port[0] = 21
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'.
EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue
REISERFS warning (device loop4): super-6514 reiserfs_parse_options: unknown quota format specified.
overlayfs: unrecognized mount option "upper@" or missing value
IPVS: ftp: loaded support on port[0] = 21
EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue
IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
nla_parse: 1 callbacks suppressed
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'.
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'.
EXT4-fs (loop5): VFS: Can't find ext4 filesystem
EXT4-fs (loop5): VFS: Can't find ext4 filesystem
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'.