syz-executor.0 (21615): drop_caches: 2 syz-executor.0 (21615): drop_caches: 2 BTRFS info (device loop1): using free space tree BTRFS info (device loop1): has skinny extents ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted BTRFS error (device loop1): fail to start transaction for status update: -28 ------------------------------------------------------ syz-executor.1/21573 is trying to acquire lock: 000000008bea8b54 (&fs_info->qgroup_ioctl_lock){+.+.}, at: btrfs_remove_qgroup+0xae/0x770 fs/btrfs/qgroup.c:1415 but task is already holding lock: 00000000be2eee0f (sb_internal#3){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] 00000000be2eee0f (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.1/21573: #0: 0000000041e3c86d (sb_writers#19){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 0000000041e3c86d (sb_writers#19){.+.+}, at: mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418 #1: 00000000be2eee0f (sb_internal#3){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] #1: 00000000be2eee0f (sb_internal#3){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528 stack backtrace: CPU: 0 PID: 21573 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_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: 0033:0x7f6da994a0a9 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:00007f6da7ebc168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f6da9a69f80 RCX: 00007f6da994a0a9 RDX: 00000000200011c0 RSI: 000000004010942a RDI: 0000000000000005 RBP: 00007f6da99a5ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe265d0d1f R14: 00007f6da7ebc300 R15: 0000000000022000 syz-executor.0 (21667): drop_caches: 2 syz-executor.0 (21667): drop_caches: 2 x_tables: duplicate underflow at hook 1 IPVS: ftp: loaded support on port[0] = 21 x_tables: duplicate underflow at hook 1 block nbd4: shutting down sockets block nbd4: Device being setup by another task block nbd1: shutting down sockets block nbd2: shutting down sockets block nbd4: Device being setup by another task block nbd1: Device being setup by another task block nbd2: shutting down sockets block nbd4: Device being setup by another task block nbd1: Device being setup by another task block nbd2: Device being setup by another task block nbd0: shutting down sockets block nbd0: Device being setup by another task mip6: mip6_destopt_init_state: state's mode is not 2: 0 netlink: 28 bytes leftover after parsing attributes in process `syz-executor.2'. block nbd0: Device being setup by another task netlink: 28 bytes leftover after parsing attributes in process `syz-executor.2'. mip6: mip6_destopt_init_state: state's mode is not 2: 0 netlink: 28 bytes leftover after parsing attributes in process `syz-executor.4'. mip6: mip6_destopt_init_state: state's mode is not 2: 0 mip6: mip6_destopt_init_state: state's mode is not 2: 0 netlink: 28 bytes leftover after parsing attributes in process `syz-executor.2'. mip6: mip6_destopt_init_state: state's mode is not 2: 0 netlink: 28 bytes leftover after parsing attributes in process `syz-executor.0'. REISERFS (device loop3): found reiserfs format "3.6" with non-standard journal REISERFS (device loop3): using ordered data mode mip6: mip6_destopt_init_state: state's mode is not 2: 0 netlink: 28 bytes leftover after parsing attributes in process `syz-executor.4'. reiserfs: using flush barriers REISERFS (device loop3): journal params: device loop3, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 snd_virmidi snd_virmidi.0: control 0:0:0:syz0:0 is already present UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) REISERFS (device loop3): checking transaction log (loop3) mip6: mip6_destopt_init_state: state's mode is not 2: 0 netlink: 28 bytes leftover after parsing attributes in process `syz-executor.0'. mip6: mip6_destopt_init_state: state's mode is not 2: 0 netlink: 28 bytes leftover after parsing attributes in process `syz-executor.2'. REISERFS (device loop3): Using r5 hash to sort names REISERFS (device loop3): Created .reiserfs_priv - reserved for xattr storage. mip6: mip6_destopt_init_state: state's mode is not 2: 0 netlink: 28 bytes leftover after parsing attributes in process `syz-executor.4'. audit: type=1800 audit(1672354190.972:37): pid=22159 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="loop1" ino=1357 res=0 snd_virmidi snd_virmidi.0: control 0:0:0:syz0:0 is already present snd_virmidi snd_virmidi.0: control 0:0:0:syz0:0 is already present UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) mip6: mip6_destopt_init_state: state's mode is not 2: 0 netlink: 28 bytes leftover after parsing attributes in process `syz-executor.0'. audit: type=1804 audit(1672354191.522:38): pid=22226 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir2845760394/syzkaller.TfcWK9/667/bus" dev="sda1" ino=14641 res=1 REISERFS (device loop3): found reiserfs format "3.6" with non-standard journal REISERFS (device loop3): using ordered data mode reiserfs: using flush barriers REISERFS (device loop3): journal params: device loop3, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 audit: type=1800 audit(1672354191.522:39): pid=22226 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="bus" dev="sda1" ino=14641 res=0 REISERFS (device loop3): checking transaction log (loop3) audit: type=1800 audit(1672354191.782:40): pid=22213 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="loop1" ino=1357 res=0 REISERFS (device loop3): Using r5 hash to sort names REISERFS (device loop3): Created .reiserfs_priv - reserved for xattr storage. UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) PKCS7: Unknown OID: [5] (bad) PKCS7: Only support pkcs7_signedData type audit: type=1804 audit(1672354192.442:41): pid=22268 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir2845760394/syzkaller.TfcWK9/668/bus" dev="sda1" ino=14993 res=1 audit: type=1800 audit(1672354192.442:42): pid=22268 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="bus" dev="sda1" ino=14993 res=0 PKCS7: Unknown OID: [5] (bad) PKCS7: Only support pkcs7_signedData type REISERFS (device loop3): found reiserfs format "3.6" with non-standard journal audit: type=1804 audit(1672354192.992:43): pid=22283 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir3346180379/syzkaller.1J88CR/665/bus" dev="sda1" ino=15414 res=1 REISERFS (device loop3): using ordered data mode audit: type=1800 audit(1672354192.992:44): pid=22283 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.0" name="bus" dev="sda1" ino=15414 res=0 audit: type=1800 audit(1672354193.262:45): pid=22271 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="loop1" ino=1357 res=0 reiserfs: using flush barriers REISERFS (device loop3): journal params: device loop3, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop3): checking transaction log (loop3) REISERFS (device loop3): Using r5 hash to sort names REISERFS (device loop3): Created .reiserfs_priv - reserved for xattr storage. PKCS7: Unknown OID: [5] (bad) PKCS7: Only support pkcs7_signedData type audit: type=1804 audit(1672354194.383:46): pid=22319 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir3346180379/syzkaller.1J88CR/666/bus" dev="sda1" ino=14993 res=1 UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000)