BTRFS error (device loop2): fail to start transaction for status update: -28 EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.2/10010 is trying to acquire lock: 00000000f2a6aeca (&fs_info->qgroup_ioctl_lock){+.+.}, at: btrfs_create_qgroup+0x5a/0x270 fs/btrfs/qgroup.c:1380 but task is already holding lock: 0000000070b675f4 (sb_internal#2){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] 0000000070b675f4 (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.2/10010: #0: 0000000024f19043 (sb_writers#15){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 0000000024f19043 (sb_writers#15){.+.+}, at: mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418 #1: 0000000070b675f4 (sb_internal#2){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] #1: 0000000070b675f4 (sb_internal#2){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528 stack backtrace: CPU: 0 PID: 10010 Comm: syz-executor.2 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_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: 0033:0x7f635eaf20a9 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:00007f635d064168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f635ec11f80 RCX: 00007f635eaf20a9 RDX: 0000000020000200 RSI: 000000004010942a RDI: 0000000000000004 RBP: 00007f635eb4dae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc89fd2c3f R14: 00007f635d064300 R15: 0000000000022000 9pnet: Insufficient options for proto=fd overlayfs: unrecognized mount option "smackfshat=trusted.overlay.nlink" or missing value audit: type=1800 audit(1672446379.939:3): pid=10119 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="file0" dev="sda1" ino=13960 res=0 audit: type=1800 audit(1672446380.029:4): pid=10128 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="file0" dev="sda1" ino=13965 res=0 audit: type=1800 audit(1672446380.119:5): pid=10140 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="file0" dev="sda1" ino=13966 res=0 audit: type=1800 audit(1672446380.189:6): pid=10149 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="file0" dev="sda1" ino=13966 res=0 9pnet: Insufficient options for proto=fd overlayfs: unrecognized mount option "smackfshat=trusted.overlay.nlink" or missing value BTRFS info (device loop4): enabling inode map caching BTRFS warning (device loop4): excessive commit interval 620990646 BTRFS info (device loop4): force zlib compression, level 3 BTRFS info (device loop4): using free space tree BTRFS info (device loop4): has skinny extents BTRFS warning (device ): duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor.2 (10116) BTRFS warning (device ): duplicate device /dev/loop2 devid 1 generation 8 scanned by systemd-udevd (10177) BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor.0 (10130) BTRFS error (device loop4): fail to start transaction for status update: -28 BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 8 scanned by systemd-udevd (10179) 9pnet: Insufficient options for proto=fd BTRFS info (device loop2): enabling inode map caching BTRFS warning (device loop2): excessive commit interval 620990646 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 warning (device ): duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor.0 (10224) 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd overlayfs: unrecognized mount option "smackfshat=trusted.overlay.nlink" or missing value BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor.4 (10237) BTRFS error (device loop2): fail to start transaction for status update: -28 TCP: request_sock_TCP: Possible SYN flooding on port 2. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 2. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 2. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 2. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 2. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 2. Sending cookies. Check SNMP counters. BTRFS info (device loop4): enabling inode map caching BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor.0 (10306) BTRFS warning (device loop4): excessive commit interval 620990646 BTRFS info (device loop4): force zlib compression, level 3 BTRFS warning (device ): duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor.2 (10322) BTRFS info (device loop4): using free space tree BTRFS info (device loop4): has skinny extents BTRFS warning (device ): duplicate device /dev/loop2 devid 1 generation 8 scanned by systemd-udevd (10345) BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 8 scanned by systemd-udevd (10343) BTRFS error (device loop4): fail to start transaction for status update: -28 TCP: request_sock_TCP: Possible SYN flooding on port 2. Sending cookies. Check SNMP counters. netlink: 564 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 564 bytes leftover after parsing attributes in process `syz-executor.1'. IPVS: ftp: loaded support on port[0] = 21 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. IPVS: ftp: loaded support on port[0] = 21 netlink: 564 bytes leftover after parsing attributes in process `syz-executor.5'. IPVS: ftp: loaded support on port[0] = 21 EXT4-fs (loop4): couldn't mount RDWR because of unsupported optional features (8000) syz-executor.5 calls setitimer() with new_value NULL pointer. Misfeature support will be removed IPVS: ftp: loaded support on port[0] = 21 BTRFS: device fsid 395ef67a-297e-477c-816d-cd80a5b93e5d devid 1 transid 8 /dev/loop4 BTRFS error (device loop4): unsupported checksum algorithm 2 BTRFS error (device loop4): superblock checksum mismatch BTRFS error (device loop4): open_ctree failed XFS (loop5): Superblock has unknown read-only compatible features (0x8) enabled. XFS (loop5): Superblock has unknown incompatible features (0x8) enabled. XFS (loop5): Filesystem cannot be safely mounted by this kernel. XFS (loop5): SB validate failed with error -22. audit: type=1800 audit(1672446386.229:7): pid=10864 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="bus" dev="sda1" ino=13951 res=0 audit: type=1800 audit(1672446386.249:8): pid=10864 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="bus" dev="sda1" ino=13951 res=0 BTRFS error (device loop4): unsupported checksum algorithm 2 BTRFS error (device loop4): superblock checksum mismatch BTRFS error (device loop4): open_ctree failed audit: type=1800 audit(1672446386.619:9): pid=10939 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="bus" dev="sda1" ino=13970 res=0 audit: type=1800 audit(1672446386.639:10): pid=10939 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="bus" dev="sda1" ino=13970 res=0 BTRFS error (device loop4): unsupported checksum algorithm 2 BTRFS error (device loop4): superblock checksum mismatch BTRFS error (device loop4): open_ctree failed audit: type=1800 audit(1672446386.979:11): pid=10993 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="bus" dev="sda1" ino=13952 res=0 audit: type=1800 audit(1672446386.999:12): pid=10993 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="bus" dev="sda1" ino=13952 res=0 EXT4-fs (loop5): Test dummy encryption mount option ignored EXT4-fs (loop5): Ignoring removed nomblk_io_submit option EXT4-fs (loop5): Unsupported blocksize for fs encryption audit: type=1804 audit(1672446387.299:13): pid=11058 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir2939806207/syzkaller.zzLaj8/69/bus/bus" dev="sda1" ino=14036 res=1 BTRFS error (device loop4): unsupported checksum algorithm 2 BTRFS error (device loop4): superblock checksum mismatch BTRFS error (device loop4): open_ctree failed audit: type=1800 audit(1672446387.369:14): pid=11047 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="bus" dev="sda1" ino=13951 res=0 audit: type=1800 audit(1672446387.379:15): pid=11047 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="bus" dev="sda1" ino=13951 res=0 EXT4-fs (loop2): Test dummy encryption mount option ignored EXT4-fs (loop5): Test dummy encryption mount option ignored EXT4-fs (loop2): Ignoring removed nomblk_io_submit option EXT4-fs (loop5): Ignoring removed nomblk_io_submit option EXT4-fs (loop5): Unsupported blocksize for fs encryption EXT4-fs (loop2): Unsupported blocksize for fs encryption ISO 9660 Extensions: Microsoft Joliet Level 0 rock: corrupted directory entry. extent=32, offset=2044, size=237 overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. audit: type=1800 audit(1672446387.649:16): pid=11091 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="bus" dev="sda1" ino=14021 res=0 IPVS: ftp: loaded support on port[0] = 21 ISO 9660 Extensions: Microsoft Joliet Level 0 EXT4-fs (loop5): Test dummy encryption mount option ignored IPVS: ftp: loaded support on port[0] = 21 rock: corrupted directory entry. extent=32, offset=2044, size=237 EXT4-fs (loop5): Ignoring removed nomblk_io_submit option ISO 9660 Extensions: Microsoft Joliet Level 0 EXT4-fs (loop5): Unsupported blocksize for fs encryption overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. rock: corrupted directory entry. extent=32, offset=2044, size=237 ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1856). overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1856). EXT4-fs (loop5): Test dummy encryption mount option ignored EXT4-fs (loop5): Ignoring removed nomblk_io_submit option EXT4-fs (loop5): Unsupported blocksize for fs encryption ISO 9660 Extensions: Microsoft Joliet Level 0 rock: corrupted directory entry. extent=32, offset=2044, size=237 ISO 9660 Extensions: Microsoft Joliet Level 0 rock: corrupted directory entry. extent=32, offset=2044, size=237 overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. ISO 9660 Extensions: Microsoft Joliet Level 0 rock: corrupted directory entry. extent=32, offset=2044, size=237 overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. ISO 9660 Extensions: Microsoft Joliet Level 0 rock: corrupted directory entry. extent=32, offset=2044, size=237 ISOFS: Interleaved files not (yet) supported. overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. ISOFS: File unit size != 0 for ISO file (1856). ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1856).