BTRFS info (device loop5): using free space tree usb usb1: usbfs: process 13729 (syz-executor.3) did not claim interface 0 before use BTRFS info (device loop5): has skinny extents BTRFS error (device loop5): fail to start transaction for status update: -28 ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.5/13689 is trying to acquire lock: 0000000016087271 (&fs_info->qgroup_ioctl_lock){+.+.}, at: btrfs_create_qgroup+0x5a/0x270 fs/btrfs/qgroup.c:1380 but task is already holding lock: 0000000099a09717 (sb_internal#3){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] 0000000099a09717 (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_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#3); lock(&fs_info->qgroup_ioctl_lock); lock(sb_internal#3); lock(&fs_info->qgroup_ioctl_lock); *** DEADLOCK *** 2 locks held by syz-executor.5/13689: #0: 00000000f482fca5 (sb_writers#23){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 00000000f482fca5 (sb_writers#23){.+.+}, at: mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418 #1: 0000000099a09717 (sb_internal#3){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] #1: 0000000099a09717 (sb_internal#3){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528 stack backtrace: CPU: 0 PID: 13689 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_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: 0033:0x7f5e3f3910d9 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:00007f5e3d903168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f5e3f4b0f80 RCX: 00007f5e3f3910d9 RDX: 00000000200011c0 RSI: 000000004010942a RDI: 0000000000000004 RBP: 00007f5e3f3ecae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff1e7bb93f R14: 00007f5e3d903300 R15: 0000000000022000 XFS (loop2): DAX enabled. Warning: EXPERIMENTAL, use at your own risk XFS (loop2): DAX unsupported by block device. Turning off DAX. XFS (loop2): Mounting V4 Filesystem XFS (loop2): Ending clean mount XFS (loop2): Quotacheck needed: Please wait. XFS (loop2): Quotacheck: Done. audit: type=1804 audit(1671638396.004:72): pid=13718 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir1293617201/syzkaller.RnQMUg/65/file0/bus" dev="loop2" ino=43 res=1 usb usb1: usbfs: process 13779 (syz-executor.3) did not claim interface 0 before use XFS (loop2): Unmounting Filesystem usb usb1: usbfs: process 13800 (syz-executor.3) did not claim interface 0 before use BTRFS info (device loop5): using free space tree BTRFS info (device loop5): has skinny extents XFS (loop2): DAX enabled. Warning: EXPERIMENTAL, use at your own risk XFS (loop2): DAX unsupported by block device. Turning off DAX. XFS (loop2): Mounting V4 Filesystem XFS (loop0): DAX enabled. Warning: EXPERIMENTAL, use at your own risk XFS (loop0): DAX unsupported by block device. Turning off DAX. XFS (loop0): Mounting V4 Filesystem XFS (loop2): Ending clean mount XFS (loop2): Quotacheck needed: Please wait. BTRFS error (device loop5): fail to start transaction for status update: -28 XFS (loop2): Quotacheck: Done. XFS (loop3): DAX enabled. Warning: EXPERIMENTAL, use at your own risk XFS (loop0): Ending clean mount XFS (loop3): DAX unsupported by block device. Turning off DAX. XFS (loop3): Mounting V4 Filesystem XFS (loop0): Quotacheck needed: Please wait. XFS (loop0): Quotacheck: Done. XFS (loop3): Ending clean mount XFS (loop3): Quotacheck needed: Please wait. XFS (loop3): Quotacheck: Done. audit: type=1804 audit(1671638397.124:73): pid=13823 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir1293617201/syzkaller.RnQMUg/66/file0/bus" dev="loop2" ino=43 res=1 audit: type=1804 audit(1671638397.234:74): pid=13814 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir1220794507/syzkaller.hwD06h/27/file0/bus" dev="loop3" ino=43 res=1 XFS (loop2): Unmounting Filesystem audit: type=1804 audit(1671638397.234:75): pid=13801 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir4151979678/syzkaller.Caz62Z/75/file0/bus" dev="loop0" ino=43 res=1 XFS (loop0): Unmounting Filesystem audit: type=1800 audit(1671638397.484:76): pid=13903 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="file1" dev="sda1" ino=14359 res=0 XFS (loop3): Unmounting Filesystem 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 XFS (loop2): DAX enabled. Warning: EXPERIMENTAL, use at your own risk XFS (loop2): DAX unsupported by block device. Turning off DAX. XFS (loop2): Mounting V4 Filesystem XFS (loop2): Ending clean mount XFS (loop2): Quotacheck needed: Please wait. XFS (loop2): Quotacheck: Done. XFS (loop0): DAX enabled. Warning: EXPERIMENTAL, use at your own risk XFS (loop0): DAX unsupported by block device. Turning off DAX. XFS (loop0): Mounting V4 Filesystem audit: type=1804 audit(1671638398.644:77): pid=13929 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir1293617201/syzkaller.RnQMUg/67/file0/bus" dev="loop2" ino=43 res=1 XFS (loop0): Ending clean mount XFS (loop0): Quotacheck needed: Please wait. XFS (loop0): Quotacheck: Done. BTRFS info (device loop5): using free space tree BTRFS info (device loop5): has skinny extents XFS (loop2): Unmounting Filesystem audit: type=1804 audit(1671638398.804:78): pid=13938 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir4151979678/syzkaller.Caz62Z/76/file0/bus" dev="loop0" ino=43 res=1 XFS (loop3): DAX enabled. Warning: EXPERIMENTAL, use at your own risk XFS (loop3): DAX unsupported by block device. Turning off DAX. audit: type=1800 audit(1671638398.874:79): pid=14022 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="file1" dev="sda1" ino=14392 res=0 XFS (loop0): Unmounting Filesystem XFS (loop3): Mounting V4 Filesystem XFS (loop3): Ending clean mount XFS (loop3): Quotacheck needed: Please wait. XFS (loop3): Quotacheck: Done. audit: type=1804 audit(1671638399.014:80): pid=13944 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir1220794507/syzkaller.hwD06h/28/file0/bus" dev="loop3" ino=43 res=1 BTRFS error (device loop5): fail to start transaction for status update: -28 XFS (loop3): Unmounting Filesystem print_req_error: I/O error, dev loop6, sector 648 XFS (loop2): DAX enabled. Warning: EXPERIMENTAL, use at your own risk XFS (loop2): DAX unsupported by block device. Turning off DAX. XFS (loop2): Mounting V4 Filesystem XFS (loop2): Ending clean mount XFS (loop2): Quotacheck needed: Please wait. XFS (loop2): Quotacheck: Done. XFS (loop0): DAX enabled. Warning: EXPERIMENTAL, use at your own risk XFS (loop0): DAX unsupported by block device. Turning off DAX. XFS (loop0): Mounting V4 Filesystem audit: type=1804 audit(1671638400.104:81): pid=14067 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir1293617201/syzkaller.RnQMUg/68/file0/bus" dev="loop2" ino=43 res=1 XFS (loop0): Ending clean mount XFS (loop0): Quotacheck needed: Please wait. XFS (loop0): Quotacheck: Done. XFS (loop2): Unmounting Filesystem XFS (loop3): DAX enabled. Warning: EXPERIMENTAL, use at your own risk XFS (loop0): Unmounting Filesystem XFS (loop3): DAX unsupported by block device. Turning off DAX. XFS (loop3): Mounting V4 Filesystem XFS (loop3): Ending clean mount XFS (loop3): Quotacheck needed: Please wait. XFS (loop3): Quotacheck: Done. print_req_error: I/O error, dev loop6, sector 520 XFS (loop3): Unmounting Filesystem print_req_error: I/O error, dev loop6, sector 392 device team0 entered promiscuous mode device team_slave_0 entered promiscuous mode device team_slave_1 entered promiscuous mode device team0 left promiscuous mode device team_slave_0 left promiscuous mode device team_slave_1 left promiscuous mode device team0 entered promiscuous mode kauditd_printk_skb: 2 callbacks suppressed audit: type=1800 audit(1671638401.124:84): pid=14190 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="file1" dev="sda1" ino=13905 res=0 device team_slave_0 entered promiscuous mode device team_slave_1 entered promiscuous mode print_req_error: I/O error, dev loop6, sector 768 netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. device team0 left promiscuous mode device team_slave_0 left promiscuous mode device team_slave_1 left promiscuous mode device lo entered promiscuous mode Y4`Ҙ: renamed from lo audit: type=1800 audit(1671638401.685:85): pid=14191 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="file1" dev="sda1" ino=14433 res=0 device team0 entered promiscuous mode device team_slave_0 entered promiscuous mode device team_slave_1 entered promiscuous mode device team0 left promiscuous mode device team_slave_0 left promiscuous mode device team_slave_1 left promiscuous mode device team0 entered promiscuous mode device team_slave_0 entered promiscuous mode device team_slave_1 entered promiscuous mode device team0 left promiscuous mode netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. device team_slave_0 left promiscuous mode device team_slave_1 left promiscuous mode netlink: 8 bytes leftover after parsing attributes in process `syz-executor.2'. device lo entered promiscuous mode netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. audit: type=1800 audit(1671638402.475:86): pid=14253 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="file1" dev="sda1" ino=14441 res=0 audit: type=1800 audit(1671638402.485:87): pid=14256 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="file1" dev="sda1" ino=14454 res=0 device lo entered promiscuous mode netlink: 8 bytes leftover after parsing attributes in process `syz-executor.5'. Y4`Ҙ: renamed from lo Y4`Ҙ: renamed from lo device lo entered promiscuous mode netlink: 8 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'. Y4`Ҙ: renamed from lo device lo entered promiscuous mode netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. Y4`Ҙ: renamed from lo