REISERFS (device loop5): Created .reiserfs_priv - reserved for xattr storage. BTRFS: device fsid 28302361-d975-4c41-bd4c-c547b14b74a1 devid 1 transid 8 /dev/loop2 BTRFS info (device loop2): using free space tree BTRFS info (device loop2): has skinny extents ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.2/13275 is trying to acquire lock: 0000000016b28dce (&fs_info->qgroup_ioctl_lock){+.+.}, at: btrfs_create_qgroup+0x5a/0x270 fs/btrfs/qgroup.c:1380 but task is already holding lock: 0000000034eec09f (sb_internal#2){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] 0000000034eec09f (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){.+.+}: 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_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_create_qgroup+0x5a/0x270 fs/btrfs/qgroup.c:1380 btrfs_ioctl_qgroup_create fs/btrfs/ioctl.c:5335 [inline] btrfs_ioctl+0xcce/0x76d0 fs/btrfs/ioctl.c:6025 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#2); lock(&fs_info->qgroup_ioctl_lock); lock(sb_internal#2); lock(&fs_info->qgroup_ioctl_lock); *** DEADLOCK *** 2 locks held by syz-executor.2/13275: #0: 00000000587be866 (sb_writers#20){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 00000000587be866 (sb_writers#20){.+.+}, at: mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418 #1: 0000000034eec09f (sb_internal#2){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] #1: 0000000034eec09f (sb_internal#2){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528 stack backtrace: CPU: 0 PID: 13275 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 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_create_qgroup+0x5a/0x270 fs/btrfs/qgroup.c:1380 btrfs_ioctl_qgroup_create fs/btrfs/ioctl.c:5335 [inline] btrfs_ioctl+0xcce/0x76d0 fs/btrfs/ioctl.c:6025 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: 0033:0x7f68a35660f9 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:00007f68a1ad8168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f68a3685f80 RCX: 00007f68a35660f9 RDX: 00000000200010c0 RSI: 000000004010942a RDI: 0000000000000004 RBP: 00007f68a35c1ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffa12e94cf R14: 00007f68a1ad8300 R15: 0000000000022000 BTRFS error (device loop2): fail to start transaction for status update: -28 REISERFS (device loop0): found reiserfs format "3.5" with non-standard journal REISERFS (device loop0): using ordered data mode reiserfs: using flush barriers REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 kvm: emulating exchange as write REISERFS (device loop0): checking transaction log (loop0) BTRFS info (device loop4): using free space tree BTRFS info (device loop4): has skinny extents REISERFS (device loop0): Using r5 hash to sort names REISERFS (device loop0): using 3.5.x disk format REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. BTRFS warning (device ): duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor.2 (13367) BTRFS warning (device ): duplicate device /dev/loop2 devid 1 generation 8 scanned by systemd-udevd (13395) EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue BTRFS error (device loop4): fail to start transaction for status update: -28 REISERFS (device loop0): found reiserfs format "3.5" with non-standard journal REISERFS (device loop0): using ordered data mode usb usb8: Requested nonsensical USBDEVFS_URB_SHORT_NOT_OK. reiserfs: using flush barriers BTRFS info (device loop2): using free space tree REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop0): checking transaction log (loop0) BTRFS info (device loop2): has skinny extents kauditd_printk_skb: 127 callbacks suppressed audit: type=1804 audit(1675820885.324:86): pid=13437 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir2150437601/syzkaller.sMafWu/136/file0/bus" dev="loop1" ino=18 res=1 usb usb8: Requested nonsensical USBDEVFS_URB_SHORT_NOT_OK. REISERFS (device loop0): Using r5 hash to sort names REISERFS (device loop0): using 3.5.x disk format REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. audit: type=1800 audit(1675820885.474:87): pid=13437 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="loop1" ino=18 res=0 usb usb8: Requested nonsensical USBDEVFS_URB_SHORT_NOT_OK. usb usb8: Requested nonsensical USBDEVFS_URB_SHORT_NOT_OK. BTRFS error (device loop2): fail to start transaction for status update: -28 BTRFS info (device loop4): using free space tree BTRFS info (device loop4): has skinny extents EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue BTRFS error (device loop4): fail to start transaction for status update: -28 BTRFS info (device loop2): using free space tree BTRFS info (device loop2): has skinny extents audit: type=1804 audit(1675820886.534:88): pid=13560 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir2150437601/syzkaller.sMafWu/137/file0/bus" dev="loop1" ino=18 res=1 audit: type=1800 audit(1675820886.534:89): pid=13560 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="loop1" ino=18 res=0 BTRFS error (device loop2): fail to start transaction for status update: -28 BTRFS info (device loop4): using free space tree BTRFS info (device loop4): has skinny extents EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue BTRFS error (device loop4): fail to start transaction for status update: -28 audit: type=1804 audit(1675820887.365:90): pid=13653 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir1560831713/syzkaller.pKl9Ll/149/file0/bus" dev="loop2" ino=18 res=1 audit: type=1800 audit(1675820887.655:91): pid=13653 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="bus" dev="loop2" ino=18 res=0 EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue audit: type=1804 audit(1675820889.085:92): pid=13759 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir2150437601/syzkaller.sMafWu/138/file0/bus" dev="loop1" ino=18 res=1 audit: type=1800 audit(1675820889.125:93): pid=13759 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="loop1" ino=18 res=0 audit: type=1804 audit(1675820889.175:94): pid=13761 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir1560831713/syzkaller.pKl9Ll/150/file0/bus" dev="loop2" ino=18 res=1 audit: type=1800 audit(1675820889.175:95): pid=13761 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="bus" dev="loop2" ino=18 res=0 EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue ntfs: volume version 3.1. __ntfs_error: 4 callbacks suppressed ntfs: (device loop0): ntfs_index_lookup(): Corrupt index. Aborting lookup. ntfs: (device loop0): ntfs_mark_quotas_out_of_date(): Lookup of quota defaults entry failed. ntfs: (device loop0): load_system_files(): Failed to mark quotas out of date. Mounting read-only. Run chkdsk. ntfs: volume version 3.1. ntfs: (device loop0): ntfs_index_lookup(): Corrupt index. Aborting lookup. ntfs: (device loop0): ntfs_mark_quotas_out_of_date(): Lookup of quota defaults entry failed. ntfs: (device loop0): load_system_files(): Failed to mark quotas out of date. Mounting read-only. Run chkdsk. ntfs: volume version 3.1. ntfs: (device loop0): ntfs_index_lookup(): Corrupt index. Aborting lookup. ntfs: (device loop0): ntfs_mark_quotas_out_of_date(): Lookup of quota defaults entry failed. ntfs: (device loop0): load_system_files(): Failed to mark quotas out of date. Mounting read-only. Run chkdsk. ntfs: volume version 3.1. ntfs: (device loop0): ntfs_index_lookup(): Corrupt index. Aborting lookup. IPVS: ftp: loaded support on port[0] = 21