====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.2/10785 is trying to acquire lock: 00000000e1a0a3cd (&fs_info->qgroup_ioctl_lock){+.+.}, at: btrfs_remove_qgroup+0xae/0x770 fs/btrfs/qgroup.c:1415 but task is already holding lock: 00000000bbf6bada (sb_internal#3){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] 00000000bbf6bada (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_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_remove_qgroup+0xae/0x770 fs/btrfs/qgroup.c:1415 btrfs_ioctl_qgroup_create fs/btrfs/ioctl.c:5337 [inline] btrfs_ioctl+0x661c/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#3); lock(&fs_info->qgroup_ioctl_lock); lock(sb_internal#3); lock(&fs_info->qgroup_ioctl_lock); *** DEADLOCK *** 2 locks held by syz-executor.2/10785: #0: 00000000328e1a76 (sb_writers#17){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 00000000328e1a76 (sb_writers#17){.+.+}, at: mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418 #1: 00000000bbf6bada (sb_internal#3){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] #1: 00000000bbf6bada (sb_internal#3){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528 stack backtrace: CPU: 0 PID: 10785 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_remove_qgroup+0xae/0x770 fs/btrfs/qgroup.c:1415 btrfs_ioctl_qgroup_create fs/btrfs/ioctl.c:5337 [inline] btrfs_ioctl+0x661c/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: 0033:0x7f64e3b620a9 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:00007f64dacb3168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f64e3c82050 RCX: 00007f64e3b620a9 RDX: 00000000200011c0 RSI: 000000004010942a RDI: 0000000000000006 RBP: 00007f64e3bbdae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff0ebfdc7f R14: 00007f64dacb3300 R15: 0000000000022000 BTRFS error (device loop2): fail to start transaction for status update: -28 F2FS-fs (loop3): Found nat_bits in checkpoint [drm:drm_calc_timestamping_constants] *ERROR* crtc 29: Can't calculate constants, dotclock = 0! F2FS-fs (loop3): Mounted with checkpoint version = 48b305e5 overlayfs: failed to resolve './file1': -2 attempt to access beyond end of device loop3: rw=2049, want=45104, limit=40427 BTRFS info (device loop5): using free space tree BTRFS info (device loop5): has skinny extents BTRFS warning (device ): duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor.2 (10844) F2FS-fs (loop3): Found nat_bits in checkpoint BTRFS error (device loop5): fail to start transaction for status update: -28 Cannot find add_set index 0 as target F2FS-fs (loop3): Mounted with checkpoint version = 48b305e5 overlayfs: failed to resolve './file1': -2 attempt to access beyond end of device loop3: rw=2049, want=45104, limit=40427 BTRFS info (device loop2): using free space tree BTRFS info (device loop2): has skinny extents BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor.4 (10889) BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor.0 (10892) BTRFS warning (device ): duplicate device /dev/loop5 devid 1 generation 8 scanned by syz-executor.5 (10928) BTRFS warning (device ): duplicate device /dev/loop5 devid 1 generation 8 scanned by systemd-udevd (10981) BTRFS error (device loop2): fail to start transaction for status update: -28 BTRFS info (device loop0): using free space tree BTRFS info (device loop0): has skinny extents F2FS-fs (loop3): Found nat_bits in checkpoint BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor.4 (10993) BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 8 scanned by systemd-udevd (11038) F2FS-fs (loop3): Mounted with checkpoint version = 48b305e5 BTRFS warning (device ): duplicate device /dev/loop5 devid 1 generation 8 scanned by syz-executor.5 (10994) overlayfs: failed to resolve './file1': -2 BTRFS warning (device ): duplicate device /dev/loop5 devid 1 generation 8 scanned by systemd-udevd (11046) attempt to access beyond end of device loop3: rw=2049, want=45104, limit=40427 BTRFS warning (device ): duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor.2 (11003) BTRFS warning (device ): duplicate device /dev/loop2 devid 1 generation 8 scanned by systemd-udevd (11062) BTRFS error (device loop0): fail to start transaction for status update: -28 hfsplus: bad catalog entry type BTRFS info (device loop4): using free space tree BTRFS info (device loop4): has skinny extents BTRFS error (device loop4): fail to start transaction for status update: -28 F2FS-fs (loop3): Found nat_bits in checkpoint BTRFS info (device loop0): using free space tree BTRFS info (device loop0): has skinny extents F2FS-fs (loop3): Mounted with checkpoint version = 48b305e5 overlayfs: failed to resolve './file1': -2 attempt to access beyond end of device loop3: rw=2049, want=45104, limit=40427 audit: type=1804 audit(1672441972.745:10): pid=11176 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir508787985/syzkaller.KqqkhL/43/file0" dev="sda1" ino=14055 res=1 ********************************************************** hfsplus: bad catalog entry type 9pnet: Unknown protocol version 9p2000.u ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE ** ** ** ** trace_printk() being used. Allocating extra memory. ** ** ** ** This means that this is a DEBUG kernel and it is ** ** unsafe for production use. ** ** ** ** If you see this message and you are not debugging ** ** the kernel, report this immediately to your vendor! ** ** ** ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE ** ********************************************************** BTRFS error (device loop0): fail to start transaction for status update: -28 hfsplus: bad catalog entry type 9pnet: Unknown protocol version 9p2000.u hfsplus: bad catalog entry type 9pnet: Unknown protocol version 9p2000.u 9pnet: Unknown protocol version 9p2000.u 9pnet: Unknown protocol version 9p2000.u 9pnet: Unknown protocol version 9p2000.u 9pnet: Unknown protocol version 9p2000.u audit: type=1800 audit(1672441975.596:11): pid=11468 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.0" name="file1" dev="sda1" ino=14076 res=0 BTRFS info (device loop0): enabling inode map caching BTRFS warning (device loop0): excessive commit interval 622039222 BTRFS info (device loop0): metadata ratio 0 BTRFS info (device loop0): turning off barriers BTRFS info (device loop0): using free space tree BTRFS info (device loop0): has skinny extents audit: type=1800 audit(1672441976.216:12): pid=11468 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.0" name="bus" dev="loop0" ino=263 res=0 netlink: 'syz-executor.5': attribute type 1 has an invalid length. audit: type=1800 audit(1672441976.366:13): pid=11614 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.0" name="file1" dev="sda1" ino=14095 res=0 Started in network mode Own node identity ac141418, cluster identity 4711 Enabled bearer , priority 10 bond1: making interface ip6gretap1 the new active one bond1: Enslaving ip6gretap1 as an active interface with an up link audit: type=1800 audit(1672441976.486:14): pid=11630 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="file1" dev="sda1" ino=14054 res=0 Enabling of bearer rejected, already enabled netlink: 'syz-executor.5': attribute type 1 has an invalid length. bond2: making interface ip6gretap2 the new active one bond2: Enslaving ip6gretap2 as an active interface with an up link Enabling of bearer rejected, already enabled netlink: 'syz-executor.3': attribute type 1 has an invalid length. bond1: making interface ip6gretap1 the new active one bond1: Enslaving ip6gretap1 as an active interface with an up link Enabling of bearer rejected, already enabled netlink: 'syz-executor.5': attribute type 1 has an invalid length. bond3: making interface ip6gretap3 the new active one bond3: Enslaving ip6gretap3 as an active interface with an up link netlink: 'syz-executor.3': attribute type 1 has an invalid length. audit: type=1800 audit(1672441977.226:15): pid=11773 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="file1" dev="sda1" ino=14042 res=0