====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.4/10293 is trying to acquire lock: 000000006b13978d (&fs_info->qgroup_ioctl_lock){+.+.}, at: btrfs_del_qgroup_relation+0x45/0x70 fs/btrfs/qgroup.c:1366 but task is already holding lock: 000000001a52b467 (sb_internal#2){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] 000000001a52b467 (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_del_qgroup_relation+0x45/0x70 fs/btrfs/qgroup.c:1366 ntfs: (device loop2): parse_options(): Invalid mft_zone_multiplier option argument: 0x000000§wŒ000001 btrfs_ioctl_qgroup_assign fs/btrfs/ioctl.c:5282 [inline] btrfs_ioctl+0x6004/0x76d0 fs/btrfs/ioctl.c:6023 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 BTRFS error (device loop4): fail to start transaction for status update: -28 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.4/10293: #0: 00000000717238d2 (sb_writers#16){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 00000000717238d2 (sb_writers#16){.+.+}, at: mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418 #1: 000000001a52b467 (sb_internal#2){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] #1: 000000001a52b467 (sb_internal#2){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528 stack backtrace: CPU: 0 PID: 10293 Comm: syz-executor.4 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_del_qgroup_relation+0x45/0x70 fs/btrfs/qgroup.c:1366 btrfs_ioctl_qgroup_assign fs/btrfs/ioctl.c:5282 [inline] btrfs_ioctl+0x6004/0x76d0 fs/btrfs/ioctl.c:6023 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: 0033:0x7fe8568530a9 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:00007fe854dc5168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fe856972f80 RCX: 00007fe8568530a9 RDX: 0000000020000100 RSI: 0000000040189429 RDI: 0000000000000004 RBP: 00007fe8568aeae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc14949f9f R14: 00007fe854dc5300 R15: 0000000000022000 IPVS: ftp: loaded support on port[0] = 21 NILFS (loop0): invalid segment: Checksum error in segment payload NILFS (loop0): trying rollback from an earlier position NILFS (loop0): recovery complete NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds audit: type=1800 audit(1672087372.605:4): pid=10683 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.0" name="file0" dev="loop0" ino=12 res=0 audit: type=1804 audit(1672087372.605:5): pid=10683 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir2579634345/syzkaller.OkuBP3/43/file0/file0" dev="loop0" ino=12 res=1 NILFS (loop5): invalid segment: Checksum error in segment payload NILFS (loop5): trying rollback from an earlier position NILFS (loop1): invalid segment: Checksum error in segment payload NILFS (loop0): invalid segment: Checksum error in segment payload NILFS (loop1): trying rollback from an earlier position NILFS (loop0): trying rollback from an earlier position NILFS (loop5): recovery complete NILFS (loop1): recovery complete NILFS (loop0): recovery complete NILFS (loop5): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds NILFS (loop1): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds audit: type=1800 audit(1672087373.475:6): pid=10746 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="file0" dev="loop1" ino=12 res=0 audit: type=1804 audit(1672087373.475:7): pid=10746 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir3124189117/syzkaller.SeUhNd/54/file0/file0" dev="loop1" ino=12 res=1 audit: type=1804 audit(1672087373.575:8): pid=10745 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir3858410157/syzkaller.xibZ56/51/file0/file0" dev="loop5" ino=12 res=1 audit: type=1800 audit(1672087373.605:9): pid=10749 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.0" name="file0" dev="loop0" ino=12 res=0 audit: type=1804 audit(1672087373.615:10): pid=10749 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir2579634345/syzkaller.OkuBP3/44/file0/file0" dev="loop0" ino=12 res=1 vhci_hcd: Failed attach request for unsupported USB speed: UNKNOWN NILFS (loop0): invalid segment: Checksum error in segment payload NILFS (loop5): invalid segment: Checksum error in segment payload NILFS (loop0): trying rollback from an earlier position NILFS (loop0): recovery complete NILFS (loop5): trying rollback from an earlier position NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds NILFS (loop5): recovery complete audit: type=1800 audit(1672087374.055:11): pid=10796 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.0" name="file0" dev="loop0" ino=12 res=0 NILFS (loop1): invalid segment: Checksum error in segment payload NILFS (loop5): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds NILFS (loop1): trying rollback from an earlier position audit: type=1804 audit(1672087374.055:12): pid=10796 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir2579634345/syzkaller.OkuBP3/45/file0/file0" dev="loop0" ino=12 res=1 NILFS (loop1): recovery complete NILFS (loop1): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds audit: type=1800 audit(1672087374.135:13): pid=10789 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="file0" dev="loop5" ino=12 res=0 audit: type=1804 audit(1672087374.135:14): pid=10789 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir3858410157/syzkaller.xibZ56/52/file0/file0" dev="loop5" ino=12 res=1 audit: type=1800 audit(1672087374.355:15): pid=10811 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="file0" dev="loop1" ino=12 res=0 NILFS (loop5): invalid segment: Checksum error in segment payload NILFS (loop0): invalid segment: Checksum error in segment payload NILFS (loop0): trying rollback from an earlier position NILFS (loop5): trying rollback from an earlier position NILFS (loop0): recovery complete NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds NILFS (loop5): recovery complete NILFS (loop5): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds NILFS (loop1): invalid segment: Checksum error in segment payload NILFS (loop1): trying rollback from an earlier position NILFS (loop1): recovery complete NILFS (loop1): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy0 wpan0: encryption failed: -22 veth1_vlan: mtu less than device minimum block nbd5: NBD_DISCONNECT