possible deadlock in btrfs_qgroup_inherit
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syzbot
Nov 28, 2022, 9:52:45 PM11/28/22
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 3f8a27f9e27b Linux 4.19.211
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=10f08303880000
kernel config: https://syzkaller.appspot.com/x/.config?x=9b9277b418617afe
dashboard link: https://syzkaller.appspot.com/bug?extid=a8bd3a442ef8a33d39b1
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/98c0bdb4abb3/disk-3f8a27f9.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ea228ff02669/vmlinux-3f8a27f9.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a8bd3a...@syzkaller.appspotmail.com
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2p4, logical block 0, async page read
Buffer I/O error on dev loop2p4, logical block 0, async page read
Buffer I/O error on dev loop2p4, logical block 0, async page read
======================================================
WARNING: possible circular locking dependency detected
4.19.211-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.3/28799 is trying to acquire lock:
00000000f2efb589 (&fs_info->qgroup_ioctl_lock){+.+.}, at: btrfs_qgroup_inherit+0xde/0x1c60 fs/btrfs/qgroup.c:2284
but task is already holding lock:
0000000092eb1a9f (sb_internal#3){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline]
0000000092eb1a9f (sb_internal#3){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (sb_internal#3){.+.+}:
sb_start_intwrite include/linux/fs.h:1626 [inline]
start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528
BTRFS warning (device <unknown>): duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor.2 (28848)
btrfs_quota_enable+0x169/0x10b0 fs/btrfs/qgroup.c:905
btrfs_ioctl_quota_ctl fs/btrfs/ioctl.c:5233 [inline]
btrfs_ioctl+0x622c/0x76d0 fs/btrfs/ioctl.c:6021
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688
BTRFS warning (device <unknown>): duplicate device /dev/loop2 devid 1 generation 8 scanned by systemd-udevd (28866)
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
-> #0 (&fs_info->qgroup_ioctl_lock){+.+.}:
__mutex_lock_common kernel/locking/mutex.c:937 [inline]
__mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078
btrfs_qgroup_inherit+0xde/0x1c60 fs/btrfs/qgroup.c:2284
create_subvol+0x3aa/0x1850 fs/btrfs/ioctl.c:617
btrfs_mksubvol+0xe1d/0x1160 fs/btrfs/ioctl.c:1007
btrfs_ioctl_snap_create_transid+0x2a7/0x430 fs/btrfs/ioctl.c:1771
btrfs_ioctl_snap_create_v2+0x2db/0x5d0 fs/btrfs/ioctl.c:1885
btrfs_ioctl+0x26f6/0x76d0 fs/btrfs/ioctl.c:5934
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
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(sb_internal#3);
lock(&fs_info->qgroup_ioctl_lock);
lock(sb_internal#3);
lock(&fs_info->qgroup_ioctl_lock);
*** DEADLOCK ***
4 locks held by syz-executor.3/28799:
#0: 000000003e648b61 (sb_writers#24){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline]
#0: 000000003e648b61 (sb_writers#24){.+.+}, at: mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418
#1: 00000000d33f9d77 (&type->i_mutex_dir_key#11/1){+.+.}, at: btrfs_mksubvol+0x156/0x1160 fs/btrfs/ioctl.c:975
#2: 000000005879899f (&fs_info->subvol_sem){++++}, at: btrfs_mksubvol+0x35b/0x1160 fs/btrfs/ioctl.c:998
#3: 0000000092eb1a9f (sb_internal#3){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline]
#3: 0000000092eb1a9f (sb_internal#3){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528
stack backtrace:
CPU: 1 PID: 28799 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
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
__mutex_lock_common kernel/locking/mutex.c:937 [inline]
__mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078
btrfs_qgroup_inherit+0xde/0x1c60 fs/btrfs/qgroup.c:2284
create_subvol+0x3aa/0x1850 fs/btrfs/ioctl.c:617
btrfs_mksubvol+0xe1d/0x1160 fs/btrfs/ioctl.c:1007
btrfs_ioctl_snap_create_transid+0x2a7/0x430 fs/btrfs/ioctl.c:1771
btrfs_ioctl_snap_create_v2+0x2db/0x5d0 fs/btrfs/ioctl.c:1885
btrfs_ioctl+0x26f6/0x76d0 fs/btrfs/ioctl.c:5934
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: 0033:0x7fc10ab5f0d9
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:00007fc1090d1168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fc10ac7ef80 RCX: 00007fc10ab5f0d9
RDX: 0000000020000a80 RSI: 0000000050009418 RDI: 0000000000000004
RBP: 00007fc10abbaae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc873bdfff R14: 00007fc1090d1300 R15: 0000000000022000
BTRFS info (device loop2): enabling inode map caching
BTRFS warning (device loop2): excessive commit interval 622039222
BTRFS info (device loop2): force zlib compression, level 3
BTRFS warning (device <unknown>): duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor.3 (28920)
BTRFS info (device loop2): using free space tree
BTRFS warning (device <unknown>): duplicate device /dev/loop3 devid 1 generation 8 scanned by systemd-udevd (28935)
BTRFS info (device loop2): has skinny extents
EXT4-fs (loop1): Ignoring removed nobh option
EXT4-fs (loop1): couldn't mount RDWR because of unsupported optional features (10000)
BTRFS info (device loop2): 3 enospc errors during balance
Unsupported ieee802154 address type: 0
Unsupported ieee802154 address type: 0
BTRFS info (device loop3): enabling inode map caching
BTRFS warning (device loop3): excessive commit interval 622039222
BTRFS info (device loop3): force zlib compression, level 3
BTRFS info (device loop3): using free space tree
BTRFS info (device loop3): has skinny extents
Unsupported ieee802154 address type: 0
BTRFS info (device loop2): enabling inode map caching
BTRFS warning (device loop2): excessive commit interval 622039222
BTRFS info (device loop2): force zlib compression, level 3
BTRFS info (device loop2): using free space tree
BTRFS info (device loop2): has skinny extents
BTRFS info (device loop1): using free space tree
BTRFS info (device loop1): has skinny extents
BTRFS info (device loop2): 3 enospc errors during balance
BTRFS warning (device <unknown>): duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor.3 (29071)
BTRFS info (device loop2): enabling inode map caching
BTRFS info (device loop1): using free space tree
BTRFS warning (device loop2): excessive commit interval 622039222
BTRFS info (device loop1): has skinny extents
BTRFS info (device loop2): force zlib compression, level 3
BTRFS info (device loop2): using free space tree
BTRFS warning (device <unknown>): duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor.4 (29164)
BTRFS info (device loop2): has skinny extents
BTRFS warning (device <unknown>): duplicate device /dev/loop4 devid 1 generation 8 scanned by systemd-udevd (29209)
BTRFS warning (device <unknown>): duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor.3 (29183)
BTRFS warning (device <unknown>): duplicate device /dev/loop3 devid 1 generation 8 scanned by systemd-udevd (29230)
BTRFS info (device loop2): 3 enospc errors during balance
BTRFS info (device loop1): using free space tree
BTRFS info (device loop1): has skinny extents
BTRFS info (device loop4): using free space tree
BTRFS info (device loop4): has skinny extents
BTRFS warning (device <unknown>): duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor.3 (29374)
BTRFS warning (device <unknown>): duplicate device /dev/loop3 devid 1 generation 8 scanned by systemd-udevd (29411)
BTRFS warning (device <unknown>): duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor.1 (29399)
print_req_error: 63 callbacks suppressed
print_req_error: I/O error, dev loop2, sector 0
print_req_error: I/O error, dev loop2, sector 8
print_req_error: I/O error, dev loop2, sector 0
buffer_io_error: 51 callbacks suppressed
Buffer I/O error on dev loop2p4, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 8
Buffer I/O error on dev loop2p3, logical block 1, async page read
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2p4, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2p4, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2p4, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2p4, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2p4, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2p4, logical block 0, async page read
Buffer I/O error on dev loop2p4, logical block 0, async page read
Buffer I/O error on dev loop2p4, logical block 0, async page read
JFS: discard option not supported on device
BTRFS info (device loop3): enabling auto defrag
netlink: 40 bytes leftover after parsing attributes in process `syz-executor.5'.
BTRFS info (device loop3): setting 16 feature flag
BTRFS info (device loop3): use zstd compression, level 0
JFS: discard option not supported on device
BTRFS error (device loop3): open_ctree failed
netlink: 40 bytes leftover after parsing attributes in process `syz-executor.5'.
JFS: discard option not supported on device
BTRFS info (device loop3): enabling auto defrag
JFS: discard option not supported on device
BTRFS info (device loop3): setting 16 feature flag
BTRFS info (device loop3): use zstd compression, level 0
BTRFS error (device loop3): open_ctree failed
JFS: discard option not supported on device
BTRFS info (device loop3): enabling auto defrag
BTRFS info (device loop3): setting 16 feature flag
BTRFS info (device loop3): use zstd compression, level 0
BTRFS error (device loop3): open_ctree failed
JFS: discard option not supported on device
JFS: discard option not supported on device
BTRFS info (device loop5): enabling inode map caching
BTRFS warning (device loop5): excessive commit interval 622039222
BTRFS info (device loop5): force zlib compression, level 3
BTRFS info (device loop5): using free space tree
BTRFS info (device loop5): has skinny extents
BTRFS info (device loop5): 3 enospc errors during balance
BTRFS info (device loop5): enabling inode map caching
BTRFS info (device loop3): enabling auto defrag
BTRFS warning (device loop5): excessive commit interval 622039222
BTRFS warning (device <unknown>): duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor.0 (29789)
BTRFS info (device loop3): setting 16 feature flag
BTRFS info (device loop5): force zlib compression, level 3
BTRFS warning (device <unknown>): duplicate device /dev/loop0 devid 1 generation 8 scanned by systemd-udevd (29811)
BTRFS info (device loop3): use zstd compression, level 0
BTRFS info (device loop5): using free space tree
BTRFS error (device loop3): open_ctree failed
BTRFS info (device loop5): has skinny extents
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following issue on:
HEAD commit: 3f8a27f9e27b Linux 4.19.211
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=10f08303880000
kernel config: https://syzkaller.appspot.com/x/.config?x=9b9277b418617afe
dashboard link: https://syzkaller.appspot.com/bug?extid=a8bd3a442ef8a33d39b1
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/98c0bdb4abb3/disk-3f8a27f9.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ea228ff02669/vmlinux-3f8a27f9.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a8bd3a...@syzkaller.appspotmail.com
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2p4, logical block 0, async page read
Buffer I/O error on dev loop2p4, logical block 0, async page read
Buffer I/O error on dev loop2p4, logical block 0, async page read
======================================================
WARNING: possible circular locking dependency detected
4.19.211-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.3/28799 is trying to acquire lock:
00000000f2efb589 (&fs_info->qgroup_ioctl_lock){+.+.}, at: btrfs_qgroup_inherit+0xde/0x1c60 fs/btrfs/qgroup.c:2284
but task is already holding lock:
0000000092eb1a9f (sb_internal#3){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline]
0000000092eb1a9f (sb_internal#3){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (sb_internal#3){.+.+}:
sb_start_intwrite include/linux/fs.h:1626 [inline]
start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528
BTRFS warning (device <unknown>): duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor.2 (28848)
btrfs_quota_enable+0x169/0x10b0 fs/btrfs/qgroup.c:905
btrfs_ioctl_quota_ctl fs/btrfs/ioctl.c:5233 [inline]
btrfs_ioctl+0x622c/0x76d0 fs/btrfs/ioctl.c:6021
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688
BTRFS warning (device <unknown>): duplicate device /dev/loop2 devid 1 generation 8 scanned by systemd-udevd (28866)
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
-> #0 (&fs_info->qgroup_ioctl_lock){+.+.}:
__mutex_lock_common kernel/locking/mutex.c:937 [inline]
__mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078
btrfs_qgroup_inherit+0xde/0x1c60 fs/btrfs/qgroup.c:2284
create_subvol+0x3aa/0x1850 fs/btrfs/ioctl.c:617
btrfs_mksubvol+0xe1d/0x1160 fs/btrfs/ioctl.c:1007
btrfs_ioctl_snap_create_transid+0x2a7/0x430 fs/btrfs/ioctl.c:1771
btrfs_ioctl_snap_create_v2+0x2db/0x5d0 fs/btrfs/ioctl.c:1885
btrfs_ioctl+0x26f6/0x76d0 fs/btrfs/ioctl.c:5934
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
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(sb_internal#3);
lock(&fs_info->qgroup_ioctl_lock);
lock(sb_internal#3);
lock(&fs_info->qgroup_ioctl_lock);
*** DEADLOCK ***
4 locks held by syz-executor.3/28799:
#0: 000000003e648b61 (sb_writers#24){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline]
#0: 000000003e648b61 (sb_writers#24){.+.+}, at: mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418
#1: 00000000d33f9d77 (&type->i_mutex_dir_key#11/1){+.+.}, at: btrfs_mksubvol+0x156/0x1160 fs/btrfs/ioctl.c:975
#2: 000000005879899f (&fs_info->subvol_sem){++++}, at: btrfs_mksubvol+0x35b/0x1160 fs/btrfs/ioctl.c:998
#3: 0000000092eb1a9f (sb_internal#3){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline]
#3: 0000000092eb1a9f (sb_internal#3){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528
stack backtrace:
CPU: 1 PID: 28799 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
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
__mutex_lock_common kernel/locking/mutex.c:937 [inline]
__mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078
btrfs_qgroup_inherit+0xde/0x1c60 fs/btrfs/qgroup.c:2284
create_subvol+0x3aa/0x1850 fs/btrfs/ioctl.c:617
btrfs_mksubvol+0xe1d/0x1160 fs/btrfs/ioctl.c:1007
btrfs_ioctl_snap_create_transid+0x2a7/0x430 fs/btrfs/ioctl.c:1771
btrfs_ioctl_snap_create_v2+0x2db/0x5d0 fs/btrfs/ioctl.c:1885
btrfs_ioctl+0x26f6/0x76d0 fs/btrfs/ioctl.c:5934
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: 0033:0x7fc10ab5f0d9
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:00007fc1090d1168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fc10ac7ef80 RCX: 00007fc10ab5f0d9
RDX: 0000000020000a80 RSI: 0000000050009418 RDI: 0000000000000004
RBP: 00007fc10abbaae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc873bdfff R14: 00007fc1090d1300 R15: 0000000000022000
BTRFS info (device loop2): enabling inode map caching
BTRFS warning (device loop2): excessive commit interval 622039222
BTRFS info (device loop2): force zlib compression, level 3
BTRFS warning (device <unknown>): duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor.3 (28920)
BTRFS info (device loop2): using free space tree
BTRFS warning (device <unknown>): duplicate device /dev/loop3 devid 1 generation 8 scanned by systemd-udevd (28935)
BTRFS info (device loop2): has skinny extents
EXT4-fs (loop1): Ignoring removed nobh option
EXT4-fs (loop1): couldn't mount RDWR because of unsupported optional features (10000)
BTRFS info (device loop2): 3 enospc errors during balance
Unsupported ieee802154 address type: 0
Unsupported ieee802154 address type: 0
BTRFS info (device loop3): enabling inode map caching
BTRFS warning (device loop3): excessive commit interval 622039222
BTRFS info (device loop3): force zlib compression, level 3
BTRFS info (device loop3): using free space tree
BTRFS info (device loop3): has skinny extents
Unsupported ieee802154 address type: 0
BTRFS info (device loop2): enabling inode map caching
BTRFS warning (device loop2): excessive commit interval 622039222
BTRFS info (device loop2): force zlib compression, level 3
BTRFS info (device loop2): using free space tree
BTRFS info (device loop2): has skinny extents
BTRFS info (device loop1): using free space tree
BTRFS info (device loop1): has skinny extents
BTRFS info (device loop2): 3 enospc errors during balance
BTRFS warning (device <unknown>): duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor.3 (29071)
BTRFS info (device loop2): enabling inode map caching
BTRFS info (device loop1): using free space tree
BTRFS warning (device loop2): excessive commit interval 622039222
BTRFS info (device loop1): has skinny extents
BTRFS info (device loop2): force zlib compression, level 3
BTRFS info (device loop2): using free space tree
BTRFS warning (device <unknown>): duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor.4 (29164)
BTRFS info (device loop2): has skinny extents
BTRFS warning (device <unknown>): duplicate device /dev/loop4 devid 1 generation 8 scanned by systemd-udevd (29209)
BTRFS warning (device <unknown>): duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor.3 (29183)
BTRFS warning (device <unknown>): duplicate device /dev/loop3 devid 1 generation 8 scanned by systemd-udevd (29230)
BTRFS info (device loop2): 3 enospc errors during balance
BTRFS info (device loop1): using free space tree
BTRFS info (device loop1): has skinny extents
BTRFS info (device loop4): using free space tree
BTRFS info (device loop4): has skinny extents
BTRFS warning (device <unknown>): duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor.3 (29374)
BTRFS warning (device <unknown>): duplicate device /dev/loop3 devid 1 generation 8 scanned by systemd-udevd (29411)
BTRFS warning (device <unknown>): duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor.1 (29399)
print_req_error: 63 callbacks suppressed
print_req_error: I/O error, dev loop2, sector 0
print_req_error: I/O error, dev loop2, sector 8
print_req_error: I/O error, dev loop2, sector 0
buffer_io_error: 51 callbacks suppressed
Buffer I/O error on dev loop2p4, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 8
Buffer I/O error on dev loop2p3, logical block 1, async page read
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2p4, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2p4, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2p4, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2p4, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2p4, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2p4, logical block 0, async page read
Buffer I/O error on dev loop2p4, logical block 0, async page read
Buffer I/O error on dev loop2p4, logical block 0, async page read
JFS: discard option not supported on device
BTRFS info (device loop3): enabling auto defrag
netlink: 40 bytes leftover after parsing attributes in process `syz-executor.5'.
BTRFS info (device loop3): setting 16 feature flag
BTRFS info (device loop3): use zstd compression, level 0
JFS: discard option not supported on device
BTRFS error (device loop3): open_ctree failed
netlink: 40 bytes leftover after parsing attributes in process `syz-executor.5'.
JFS: discard option not supported on device
BTRFS info (device loop3): enabling auto defrag
JFS: discard option not supported on device
BTRFS info (device loop3): setting 16 feature flag
BTRFS info (device loop3): use zstd compression, level 0
BTRFS error (device loop3): open_ctree failed
JFS: discard option not supported on device
BTRFS info (device loop3): enabling auto defrag
BTRFS info (device loop3): setting 16 feature flag
BTRFS info (device loop3): use zstd compression, level 0
BTRFS error (device loop3): open_ctree failed
JFS: discard option not supported on device
JFS: discard option not supported on device
BTRFS info (device loop5): enabling inode map caching
BTRFS warning (device loop5): excessive commit interval 622039222
BTRFS info (device loop5): force zlib compression, level 3
BTRFS info (device loop5): using free space tree
BTRFS info (device loop5): has skinny extents
BTRFS info (device loop5): 3 enospc errors during balance
BTRFS info (device loop5): enabling inode map caching
BTRFS info (device loop3): enabling auto defrag
BTRFS warning (device loop5): excessive commit interval 622039222
BTRFS warning (device <unknown>): duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor.0 (29789)
BTRFS info (device loop3): setting 16 feature flag
BTRFS info (device loop5): force zlib compression, level 3
BTRFS warning (device <unknown>): duplicate device /dev/loop0 devid 1 generation 8 scanned by systemd-udevd (29811)
BTRFS info (device loop3): use zstd compression, level 0
BTRFS info (device loop5): using free space tree
BTRFS error (device loop3): open_ctree failed
BTRFS info (device loop5): has skinny extents
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot
Dec 6, 2022, 11:37:47 AM12/6/22
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: 3f8a27f9e27b Linux 4.19.211
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1280324d880000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17a3fbd3880000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/98c0bdb4abb3/disk-3f8a27f9.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ea228ff02669/vmlinux-3f8a27f9.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/05047308e430/mount_2.gz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a8bd3a...@syzkaller.appspotmail.com
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
00000000117bc54e (&fs_info->qgroup_ioctl_lock){+.+.}, at: btrfs_qgroup_inherit+0xde/0x1c60 fs/btrfs/qgroup.c:2284
but task is already holding lock:
00000000480a75fd (sb_internal#2){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline]
00000000480a75fd (sb_internal#2){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (sb_internal#2){.+.+}:
lock(sb_internal#2);
lock(&fs_info->qgroup_ioctl_lock);
lock(sb_internal#2);
#0: 000000009f53b3d9 (sb_writers#11){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline]
#0: 000000009f53b3d9 (sb_writers#11){.+.+}, at: mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418
#1: 0000000089fe4360 (&type->i_mutex_dir_key#7/1){+.+.}, at: btrfs_mksubvol+0x156/0x1160 fs/btrfs/ioctl.c:975
#2: 00000000ebaa511d (&fs_info->subvol_sem){++++}, at: btrfs_mksubvol+0x35b/0x1160 fs/btrfs/ioctl.c:998
#3: 00000000480a75fd (sb_internal#2){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline]
#3: 00000000480a75fd (sb_internal#2){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528
stack backtrace:
CPU: 0 PID: 8774 Comm: syz-executor276 Not tainted 4.19.211-syzkaller #0
RIP: 0033:0x7f80121ec989
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 71 15 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:00007f800ad772f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f80122767b0 RCX: 00007f80121ec989
R10: 00007f800ad77700 R11: 0000000000000246 R12: 73736572706d6f63
R13: 61635f65646f6e69 R14: 5f65646f6e696f6e R15: 00007f80122767b8
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS warning (device loop0): excessive commit interval 622039222
btrfs_printk: 1 callbacks suppressed
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
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, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
HEAD commit: 3f8a27f9e27b Linux 4.19.211
git tree: linux-4.19.y
kernel config: https://syzkaller.appspot.com/x/.config?x=9b9277b418617afe
dashboard link: https://syzkaller.appspot.com/bug?extid=a8bd3a442ef8a33d39b1
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=139e2929880000
dashboard link: https://syzkaller.appspot.com/bug?extid=a8bd3a442ef8a33d39b1
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17a3fbd3880000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/98c0bdb4abb3/disk-3f8a27f9.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ea228ff02669/vmlinux-3f8a27f9.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a8bd3a...@syzkaller.appspotmail.com
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
======================================================
WARNING: possible circular locking dependency detected
4.19.211-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor276/8774 is trying to acquire lock:
WARNING: possible circular locking dependency detected
4.19.211-syzkaller #0 Not tainted
------------------------------------------------------
00000000117bc54e (&fs_info->qgroup_ioctl_lock){+.+.}, at: btrfs_qgroup_inherit+0xde/0x1c60 fs/btrfs/qgroup.c:2284
but task is already holding lock:
00000000480a75fd (sb_internal#2){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
sb_start_intwrite include/linux/fs.h:1626 [inline]
start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528
start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528
btrfs_quota_enable+0x169/0x10b0 fs/btrfs/qgroup.c:905
btrfs_ioctl_quota_ctl fs/btrfs/ioctl.c:5233 [inline]
btrfs_ioctl+0x622c/0x76d0 fs/btrfs/ioctl.c:6021
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688
btrfs_ioctl_quota_ctl fs/btrfs/ioctl.c:5233 [inline]
btrfs_ioctl+0x622c/0x76d0 fs/btrfs/ioctl.c:6021
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688
lock(&fs_info->qgroup_ioctl_lock);
lock(sb_internal#2);
lock(&fs_info->qgroup_ioctl_lock);
*** DEADLOCK ***
4 locks held by syz-executor276/8774:
*** DEADLOCK ***
#0: 000000009f53b3d9 (sb_writers#11){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline]
#0: 000000009f53b3d9 (sb_writers#11){.+.+}, at: mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418
#1: 0000000089fe4360 (&type->i_mutex_dir_key#7/1){+.+.}, at: btrfs_mksubvol+0x156/0x1160 fs/btrfs/ioctl.c:975
#2: 00000000ebaa511d (&fs_info->subvol_sem){++++}, at: btrfs_mksubvol+0x35b/0x1160 fs/btrfs/ioctl.c:998
#3: 00000000480a75fd (sb_internal#2){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline]
#3: 00000000480a75fd (sb_internal#2){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528
stack backtrace:
CPU: 0 PID: 8774 Comm: syz-executor276 Not tainted 4.19.211-syzkaller #0
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 71 15 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:00007f800ad772f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f80122767b0 RCX: 00007f80121ec989
RDX: 0000000020000a80 RSI: 0000000050009418 RDI: 0000000000000004
RBP: 00007f80122431b0 R08: 00007f800ad77700 R09: 0000000000000000
R10: 00007f800ad77700 R11: 0000000000000246 R12: 73736572706d6f63
R13: 61635f65646f6e69 R14: 5f65646f6e696f6e R15: 00007f80122767b8
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS warning (device loop0): excessive commit interval 622039222
btrfs_printk: 1 callbacks suppressed
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
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, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS error (device loop0): fail to start transaction for status update: -28
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