syz-executor.2 (12746): drop_caches: 2 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-executor.0/12675 is trying to acquire lock: 0000000038936a6b (&fs_info->qgroup_ioctl_lock){+.+.}, at: btrfs_limit_qgroup+0x63/0x7b0 fs/btrfs/qgroup.c:1467 but task is already holding lock: 0000000043a79a55 (sb_internal#3){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] 0000000043a79a55 (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_quota_enable+0x169/0x10b0 fs/btrfs/qgroup.c:905 BTRFS error (device loop0): fail to start transaction for status update: -28 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 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_limit_qgroup+0x63/0x7b0 fs/btrfs/qgroup.c:1467 btrfs_ioctl_qgroup_limit fs/btrfs/ioctl.c:5386 [inline] btrfs_ioctl+0x3c0c/0x76d0 fs/btrfs/ioctl.c:6027 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 *** 2 locks held by syz-executor.0/12675: #0: 0000000087661ec2 (sb_writers#17){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 0000000087661ec2 (sb_writers#17){.+.+}, at: mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418 #1: 0000000043a79a55 (sb_internal#3){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] #1: 0000000043a79a55 (sb_internal#3){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528 stack backtrace: CPU: 0 PID: 12675 Comm: syz-executor.0 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_limit_qgroup+0x63/0x7b0 fs/btrfs/qgroup.c:1467 btrfs_ioctl_qgroup_limit fs/btrfs/ioctl.c:5386 [inline] btrfs_ioctl+0x3c0c/0x76d0 fs/btrfs/ioctl.c:6027 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: 0033:0x7f468f77f0c9 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:00007f468dcf1168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f468f89ef80 RCX: 00007f468f77f0c9 RDX: 00000000200011c0 RSI: 000000008030942b RDI: 0000000000000004 RBP: 00007f468f7daae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd72e273cf R14: 00007f468dcf1300 R15: 0000000000022000 XFS (loop3): Mounting V4 Filesystem XFS (loop3): Ending clean mount kauditd_printk_skb: 54 callbacks suppressed audit: type=1804 audit(1673129790.424:227): pid=12650 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir764077607/syzkaller.JnStyr/27/bus/bus" dev="loop3" ino=41 res=1 syz-executor.2 (12746): drop_caches: 2 XFS (loop3): Unmounting Filesystem F2FS-fs (loop1): f2fs_check_nid_range: out-of-range nid=2, run fsck to fix. F2FS-fs (loop1): Mounted with checkpoint version = 48b305e5 audit: type=1800 audit(1673129791.054:228): pid=12653 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="loop1" ino=10 res=0 audit: type=1800 audit(1673129791.054:229): pid=12850 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="loop1" ino=10 res=0 syz-executor.2 (12862): drop_caches: 2 syz-executor.2 (12862): drop_caches: 2 syz-executor.2 (12887): drop_caches: 2 syz-executor.2 (12887): drop_caches: 2 overlayfs: unrecognized mount option "upperiir=./b lir=./file1" or missing value FAT-fs (md0): Unrecognized mount option "overlay" or missing value netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 'syz-executor.2': attribute type 6 has an invalid length. XFS (loop3): Mounting V4 Filesystem overlayfs: unrecognized mount option "upperNk|./bhs" or missing value XFS (loop3): Ending clean mount audit: type=1804 audit(1673129792.474:230): pid=12856 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir764077607/syzkaller.JnStyr/28/bus/bus" dev="loop3" ino=41 res=1 XFS (loop3): Unmounting Filesystem device veth0_vlan left promiscuous mode overlayfs: unrecognized mount option "upperiir=./b lir=./file1" or missing value FAT-fs (md0): Unrecognized mount option "overlay" or missing value hfsplus: unable to parse mount options netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'. overlayfs: unrecognized mount option "upperNk|./bhs" or missing value FAT-fs (md0): Unrecognized mount option "overlay" or missing value BTRFS info (device loop0): using free space tree BTRFS info (device loop0): has skinny extents XFS (loop3): Mounting V4 Filesystem XFS (loop3): Ending clean mount audit: type=1804 audit(1673129793.414:231): pid=12978 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir764077607/syzkaller.JnStyr/29/bus/bus" dev="loop3" ino=41 res=1 BTRFS error (device loop0): fail to start transaction for status update: -28 XFS (loop3): Unmounting Filesystem overlayfs: unrecognized mount option "upperNk|./bhs" or missing value device veth0_vlan left promiscuous mode XFS (loop1): Mounting V4 Filesystem XFS (loop1): Ending clean mount audit: type=1804 audit(1673129795.124:232): pid=13116 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir1249070320/syzkaller.Y2zIz9/46/bus/bus" dev="loop1" ino=41 res=1 XFS (loop3): Mounting V4 Filesystem XFS (loop0): Mounting V4 Filesystem XFS (loop3): Ending clean mount XFS (loop0): Ending clean mount audit: type=1804 audit(1673129795.264:233): pid=13146 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir764077607/syzkaller.JnStyr/30/bus/bus" dev="loop3" ino=41 res=1 XFS (loop3): Unmounting Filesystem audit: type=1804 audit(1673129795.324:234): pid=13133 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir3698903168/syzkaller.gzzUs0/55/bus/bus" dev="loop0" ino=41 res=1 XFS (loop1): Unmounting Filesystem XFS (loop0): Unmounting Filesystem XFS (loop5): Mounting V4 Filesystem XFS (loop5): Ending clean mount XFS (loop3): Mounting V4 Filesystem XFS (loop3): Ending clean mount audit: type=1804 audit(1673129796.314:235): pid=13167 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir286173416/syzkaller.Xrfch3/63/bus/bus" dev="loop5" ino=41 res=1 XFS (loop3): Unmounting Filesystem XFS (loop5): Unmounting Filesystem XFS (loop1): Mounting V4 Filesystem XFS (loop1): Ending clean mount audit: type=1804 audit(1673129797.134:236): pid=13214 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir1249070320/syzkaller.Y2zIz9/47/bus/bus" dev="loop1" ino=41 res=1 XFS (loop0): Mounting V4 Filesystem XFS (loop0): Ending clean mount audit: type=1804 audit(1673129797.624:237): pid=13244 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir3698903168/syzkaller.gzzUs0/56/bus/bus" dev="loop0" ino=41 res=1 XFS (loop1): Unmounting Filesystem wlan1: No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge) XFS (loop0): Unmounting Filesystem XFS (loop3): Mounting V4 Filesystem XFS (loop5): Mounting V4 Filesystem XFS (loop3): Ending clean mount XFS (loop5): Ending clean mount audit: type=1804 audit(1673129798.034:238): pid=13269 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir286173416/syzkaller.Xrfch3/64/bus/bus" dev="loop5" ino=41 res=1 XFS (loop3): Unmounting Filesystem XFS (loop5): Unmounting Filesystem