A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check. BTRFS info (device loop1): using free space tree BTRFS info (device loop1): has skinny extents IPVS: ftp: loaded support on port[0] = 21 ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.1/9870 is trying to acquire lock: 00000000cd39a82b (&fs_info->qgroup_ioctl_lock){+.+.}, at: btrfs_remove_qgroup+0xae/0x770 fs/btrfs/qgroup.c:1415 but task is already holding lock: 00000000392539cf (sb_internal#2){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] 00000000392539cf (sb_internal#2){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready 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 chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 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 caif:caif_disconnect_client(): nothing to disconnect 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#2); lock(&fs_info->qgroup_ioctl_lock); lock(sb_internal#2); lock(&fs_info->qgroup_ioctl_lock); *** DEADLOCK *** 2 locks held by syz-executor.1/9870: #0: 000000000dd2228f (sb_writers#14){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 000000000dd2228f (sb_writers#14){.+.+}, at: mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418 #1: 00000000392539cf (sb_internal#2){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] #1: 00000000392539cf (sb_internal#2){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528 stack backtrace: CPU: 0 PID: 9870 Comm: syz-executor.1 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 error (device loop1): fail to start transaction for status update: -28 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: 0033:0x7f686d4970c9 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:00007f686ba09168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f686d5b6f80 RCX: 00007f686d4970c9 RDX: 00000000200011c0 RSI: 000000004010942a RDI: 0000000000000004 RBP: 00007f686d4f2ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffebdd1faf R14: 00007f686ba09300 R15: 0000000000022000 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. netlink: 'syz-executor.2': attribute type 12 has an invalid length. ieee80211 phy14: Selected rate control algorithm 'minstrel_ht' netlink: 'syz-executor.4': attribute type 12 has an invalid length. ieee80211 phy15: Selected rate control algorithm 'minstrel_ht' BTRFS info (device loop5): using free space tree BTRFS info (device loop5): has skinny extents BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor.1 (10023) netlink: 'syz-executor.2': attribute type 12 has an invalid length. ieee80211 phy16: Selected rate control algorithm 'minstrel_ht' BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 8 scanned by systemd-udevd (10060) netlink: 'syz-executor.4': attribute type 12 has an invalid length. ieee80211 phy17: Selected rate control algorithm 'minstrel_ht' BTRFS error (device loop5): fail to start transaction for status update: -28 netlink: 'syz-executor.2': attribute type 12 has an invalid length. ieee80211 phy18: Selected rate control algorithm 'minstrel_ht' BTRFS info (device loop1): using free space tree BTRFS info (device loop1): has skinny extents netlink: 36 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 100 bytes leftover after parsing attributes in process `syz-executor.3'. BTRFS warning (device ): duplicate device /dev/loop5 devid 1 generation 8 scanned by syz-executor.5 (10158) BTRFS warning (device ): duplicate device /dev/loop5 devid 1 generation 8 scanned by systemd-udevd (10148) netlink: 36 bytes leftover after parsing attributes in process `syz-executor.3'. BTRFS error (device loop1): fail to start transaction for status update: -28 netlink: 100 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 36 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 100 bytes leftover after parsing attributes in process `syz-executor.3'. BTRFS info (device loop5): using free space tree BTRFS info (device loop5): has skinny extents BTRFS error (device loop5): fail to start transaction for status update: -28 BTRFS info (device loop5): using free space tree BTRFS info (device loop5): has skinny extents BTRFS error (device loop5): fail to start transaction for status update: -28 BTRFS info (device loop5): using free space tree BTRFS info (device loop5): has skinny extents BTRFS error (device loop5): fail to start transaction for status update: -28 BTRFS info (device loop5): using free space tree BTRFS info (device loop5): has skinny extents BTRFS error (device loop5): fail to start transaction for status update: -28 BTRFS info (device loop5): using free space tree BTRFS info (device loop5): has skinny extents BTRFS error (device loop5): fail to start transaction for status update: -28 BTRFS info (device loop5): using free space tree BTRFS info (device loop5): has skinny extents BTRFS error (device loop5): fail to start transaction for status update: -28 BTRFS info (device loop5): using free space tree BTRFS info (device loop5): has skinny extents BTRFS error (device loop5): fail to start transaction for status update: -28 ====================================================== WARNING: the mand mount option is being deprecated and will be removed in v5.15! ====================================================== BTRFS info (device loop5): using free space tree BTRFS info (device loop5): has skinny extents BTRFS error (device loop5): fail to start transaction for status update: -28 BTRFS info (device loop5): using free space tree BTRFS info (device loop5): has skinny extents BTRFS error (device loop5): fail to start transaction for status update: -28 BTRFS info (device loop5): using free space tree BTRFS info (device loop5): has skinny extents BTRFS error (device loop5): fail to start transaction for status update: -28 BTRFS info (device loop5): using free space tree BTRFS info (device loop5): has skinny extents L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details. BTRFS info (device loop5): using free space tree BTRFS info (device loop5): has skinny extents BTRFS info (device loop5): using free space tree BTRFS info (device loop5): has skinny extents PM: Image not found (code -6) PM: Image not found (code -6)