IPVS: ftp: loaded support on port[0] = 21 audit: type=1804 audit(1673136128.683:177): pid=13079 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir1668110838/syzkaller.hLFpRJ/61/file0" dev="sda1" ino=14161 res=1 ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.2/12995 is trying to acquire lock: 0000000032c9ffe0 (&fs_info->qgroup_ioctl_lock){+.+.}, at: btrfs_limit_qgroup+0x63/0x7b0 fs/btrfs/qgroup.c:1467 but task is already holding lock: 00000000a05f02ce (sb_internal#2){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] 00000000a05f02ce (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 error (device loop2): fail to start transaction for status update: -28 btrfs_limit_qgroup+0x63/0x7b0 fs/btrfs/qgroup.c:1467 btrfs_ioctl_qgroup_limit fs/btrfs/ioctl.c:5386 [inline] btrfs_ioctl+0x3c0c/0x76d0 fs/btrfs/ioctl.c:6027 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.2/12995: #0: 00000000f0fcdf98 (sb_writers#15){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 00000000f0fcdf98 (sb_writers#15){.+.+}, at: mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418 #1: 00000000a05f02ce (sb_internal#2){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] #1: 00000000a05f02ce (sb_internal#2){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528 stack backtrace: CPU: 1 PID: 12995 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_limit_qgroup+0x63/0x7b0 fs/btrfs/qgroup.c:1467 btrfs_ioctl_qgroup_limit fs/btrfs/ioctl.c:5386 [inline] btrfs_ioctl+0x3c0c/0x76d0 fs/btrfs/ioctl.c:6027 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: 0033:0x7fca8e5590c9 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:00007fca8cacb168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fca8e678f80 RCX: 00007fca8e5590c9 RDX: 00000000200011c0 RSI: 000000008030942b RDI: 0000000000000004 RBP: 00007fca8e5b4ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffd75cb10f R14: 00007fca8cacb300 R15: 0000000000022000 device veth0_vlan left promiscuous mode IPVS: ftp: loaded support on port[0] = 21 audit: type=1804 audit(1673136129.843:178): pid=13137 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir1668110838/syzkaller.hLFpRJ/62/file0" dev="sda1" ino=14140 res=1 BTRFS info (device loop2): using free space tree BTRFS info (device loop2): has skinny extents audit: type=1804 audit(1673136130.293:179): pid=13177 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir1668110838/syzkaller.hLFpRJ/63/file0" dev="sda1" ino=14145 res=1 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 BTRFS error (device loop2): fail to start transaction for status update: -28 device geneve2 entered promiscuous mode IPVS: ftp: loaded support on port[0] = 21 IPv6: ADDRCONF(NETDEV_CHANGE): geneve2: link becomes ready IPVS: ftp: loaded support on port[0] = 21 BTRFS info (device loop2): using free space tree BTRFS info (device loop2): has skinny extents netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. IPVS: ftp: loaded support on port[0] = 21 hub 9-0:1.0: USB hub found IPVS: ftp: loaded support on port[0] = 21 kvm: vcpu 0: requested 128 ns lapic timer period limited to 200000 ns QAT: Invalid ioctl hub 9-0:1.0: 8 ports detected QAT: Invalid ioctl IPVS: ftp: loaded support on port[0] = 21 QAT: Invalid ioctl BTRFS info (device loop2): using free space tree BTRFS info (device loop2): has skinny extents mac80211_hwsim hwsim9 : renamed from wlan1 team0: Device ipvlan1 failed to register rx_handler BTRFS info (device loop2): using free space tree BTRFS info (device loop2): has skinny extents team0: Device ipvlan1 failed to register rx_handler IPVS: ftp: loaded support on port[0] = 21 kvm: vcpu 0: requested 128 ns lapic timer period limited to 200000 ns IPVS: ftp: loaded support on port[0] = 21 BTRFS info (device loop2): using free space tree BTRFS info (device loop2): has skinny extents mac80211_hwsim hwsim6 : renamed from wlan1 team0: Device ipvlan1 failed to register rx_handler team0: Device ipvlan1 failed to register rx_handler team0: Device ipvlan1 failed to register rx_handler XFS (loop0): Mounting V4 Filesystem XFS (loop0): Ending clean mount XFS (loop0): Quotacheck needed: Please wait. XFS (loop0): Quotacheck: Done. XFS (loop0): Unmounting Filesystem F2FS-fs (loop1): Found nat_bits in checkpoint F2FS-fs (loop1): Mounted with checkpoint version = 48b305e5 audit: type=1804 audit(1673136138.064:180): pid=13820 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir1668110838/syzkaller.hLFpRJ/67/file0/bus" dev="loop1" ino=10 res=1 team0: Device ipvlan1 failed to register rx_handler hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected