EXT4-fs (loop4): mounted filesystem without journal. Opts: auto_da_alloc,noauto_da_alloc,i_version,dioread_lock,abort,resgid=0x0000000000000000,,errors=continue BTRFS info (device loop5): using free space tree BTRFS info (device loop5): has skinny extents ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.5/16055 is trying to acquire lock: 0000000004b2c285 (&fs_info->qgroup_ioctl_lock){+.+.}, at: btrfs_remove_qgroup+0xae/0x770 fs/btrfs/qgroup.c:1415 but task is already holding lock: 000000004eb924bf (sb_internal#3){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] 000000004eb924bf (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.5/16055: #0: 0000000055e80474 (sb_writers#21){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 0000000055e80474 (sb_writers#21){.+.+}, at: mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418 #1: 000000004eb924bf (sb_internal#3){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] #1: 000000004eb924bf (sb_internal#3){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528 stack backtrace: CPU: 0 PID: 16055 Comm: syz-executor.5 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: 0033:0x7f381eed50a9 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:00007f3816026168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f381eff5050 RCX: 00007f381eed50a9 RDX: 00000000200011c0 RSI: 000000004010942a RDI: 0000000000000007 RBP: 00007f381ef30ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffca159e48f R14: 00007f3816026300 R15: 0000000000022000 XFS (loop1): unknown mount option [user]. BTRFS error (device loop5): fail to start transaction for status update: -28 Process accounting resumed EXT4-fs error (device loop4): ext4_orphan_get:1256: comm syz-executor.4: bad orphan inode 99 EXT4-fs (loop4): mounted filesystem without journal. Opts: auto_da_alloc,noauto_da_alloc,i_version,dioread_lock,abort,resgid=0x0000000000000000,,errors=continue audit: type=1804 audit(1672542007.303:98): pid=16080 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir2732744114/syzkaller.Tc3mes/225/bus" dev="sda1" ino=14588 res=1 Process accounting resumed audit: type=1804 audit(1672542007.303:99): pid=16080 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir2732744114/syzkaller.Tc3mes/225/bus" dev="sda1" ino=14588 res=1 audit: type=1804 audit(1672542007.303:100): pid=16080 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir2732744114/syzkaller.Tc3mes/225/bus" dev="sda1" ino=14588 res=1 audit: type=1804 audit(1672542007.303:101): pid=16080 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir2732744114/syzkaller.Tc3mes/225/bus" dev="sda1" ino=14588 res=1 audit: type=1804 audit(1672542007.303:102): pid=16080 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir2732744114/syzkaller.Tc3mes/225/bus" dev="sda1" ino=14588 res=1 audit: type=1804 audit(1672542007.303:103): pid=16080 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir2732744114/syzkaller.Tc3mes/225/bus" dev="sda1" ino=14588 res=1 audit: type=1804 audit(1672542007.303:104): pid=16080 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir2732744114/syzkaller.Tc3mes/225/bus" dev="sda1" ino=14588 res=1 audit: type=1804 audit(1672542007.303:105): pid=16080 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir2732744114/syzkaller.Tc3mes/225/bus" dev="sda1" ino=14588 res=1 Process accounting resumed XFS (loop1): unknown mount option [user]. EXT4-fs error (device loop4): ext4_orphan_get:1256: comm syz-executor.4: bad orphan inode 99 BTRFS info (device loop5): using free space tree EXT4-fs (loop4): mounted filesystem without journal. Opts: auto_da_alloc,noauto_da_alloc,i_version,dioread_lock,abort,resgid=0x0000000000000000,,errors=continue BTRFS info (device loop5): has skinny extents BTRFS info (device loop5): Snapshot src from another FS Process accounting resumed overlayfs: filesystem on './bus' not supported as upperdir overlayfs: filesystem on './bus' not supported as upperdir overlayfs: filesystem on './bus' not supported as upperdir overlayfs: filesystem on './bus' not supported as upperdir overlayfs: filesystem on './bus' not supported as upperdir overlayfs: filesystem on './bus' not supported as upperdir overlayfs: filesystem on './bus' not supported as upperdir overlayfs: filesystem on './bus' not supported as upperdir overlayfs: filesystem on './bus' not supported as upperdir overlayfs: filesystem on './bus' not supported as upperdir overlayfs: filesystem on './bus' not supported as upperdir overlayfs: filesystem on './bus' not supported as upperdir XFS (loop1): unknown mount option [user]. overlayfs: filesystem on './bus' not supported as upperdir BTRFS info (device loop5): using free space tree BTRFS info (device loop5): has skinny extents overlayfs: filesystem on './bus' not supported as upperdir BTRFS error (device loop5): open_ctree failed netlink: 72 bytes leftover after parsing attributes in process `syz-executor.1'. kvm: vcpu 0: requested 128 ns lapic timer period limited to 200000 ns IPVS: ftp: loaded support on port[0] = 21 A link change request failed with some changes committed already. Interface gretap0 may have been left with an inconsistent configuration, please check. IPVS: ftp: loaded support on port[0] = 21 kauditd_printk_skb: 68 callbacks suppressed audit: type=1804 audit(1672542011.144:174): pid=16366 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir572826035/syzkaller.LxuIJ0/210/bus" dev="sda1" ino=14606 res=1 netlink: 72 bytes leftover after parsing attributes in process `syz-executor.1'. batman_adv: Cannot find parent device audit: type=1804 audit(1672542011.374:175): pid=16441 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir572826035/syzkaller.LxuIJ0/211/bus" dev="sda1" ino=14606 res=1 netlink: 72 bytes leftover after parsing attributes in process `syz-executor.1'. batman_adv: Cannot find parent device audit: type=1804 audit(1672542011.384:176): pid=16441 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir572826035/syzkaller.LxuIJ0/211/bus" dev="sda1" ino=14606 res=1 IPVS: ftp: loaded support on port[0] = 21 batman_adv: Cannot find parent device IPVS: ftp: loaded support on port[0] = 21 audit: type=1804 audit(1672542011.754:177): pid=16514 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir2452909324/syzkaller.VZulxz/232/bus" dev="sda1" ino=14589 res=1 A link change request failed with some changes committed already. Interface gretap0 may have been left with an inconsistent configuration, please check. batman_adv: Cannot find parent device device lo left promiscuous mode IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check. batman_adv: Cannot find parent device audit: type=1804 audit(1672542012.854:178): pid=16573 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir2452909324/syzkaller.VZulxz/233/bus" dev="sda1" ino=14607 res=1 netlink: 72 bytes leftover after parsing attributes in process `syz-executor.1'. IPVS: ftp: loaded support on port[0] = 21 batman_adv: Cannot find parent device batman_adv: Cannot find parent device batman_adv: Cannot find parent device netlink: 72 bytes leftover after parsing attributes in process `syz-executor.1'. IPVS: ftp: loaded support on port[0] = 21 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check. IPVS: ftp: loaded support on port[0] = 21 audit: type=1804 audit(1672542014.144:179): pid=16655 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir2452909324/syzkaller.VZulxz/234/bus" dev="sda1" ino=14628 res=1 batman_adv: Cannot find parent device