====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.1/8648 is trying to acquire lock: 00000000a9867a7c (sb_internal#4){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] 00000000a9867a7c (sb_internal#4){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528 but task is already holding lock: 00000000c391ddc6 (&fs_info->qgroup_ioctl_lock){+.+.}, at: btrfs_quota_enable+0xbf/0x10b0 fs/btrfs/qgroup.c:893 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&fs_info->qgroup_ioctl_lock){+.+.}: btrfs_qgroup_inherit+0xde/0x1c60 fs/btrfs/qgroup.c:2284 create_subvol+0x3aa/0x1850 fs/btrfs/ioctl.c:617 btrfs_mksubvol+0xe1d/0x1160 fs/btrfs/ioctl.c:1007 btrfs_ioctl_snap_create_transid+0x2a7/0x430 fs/btrfs/ioctl.c:1771 btrfs_ioctl_snap_create_v2+0x2db/0x5d0 fs/btrfs/ioctl.c:1885 btrfs_ioctl+0x26f6/0x76d0 fs/btrfs/ioctl.c:5934 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 (sb_internal#4){.+.+}: percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x6e/0x2a0 fs/super.c:1366 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 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&fs_info->qgroup_ioctl_lock); lock(sb_internal#4); lock(&fs_info->qgroup_ioctl_lock); lock(sb_internal#4); *** DEADLOCK *** 3 locks held by syz-executor.1/8648: #0: 000000000fae9583 (sb_writers#27){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 000000000fae9583 (sb_writers#27){.+.+}, at: mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418 #1: 0000000035911ebd (&fs_info->subvol_sem){++++}, at: btrfs_ioctl_quota_ctl fs/btrfs/ioctl.c:5229 [inline] #1: 0000000035911ebd (&fs_info->subvol_sem){++++}, at: btrfs_ioctl+0x3d12/0x76d0 fs/btrfs/ioctl.c:6021 #2: 00000000c391ddc6 (&fs_info->qgroup_ioctl_lock){+.+.}, at: btrfs_quota_enable+0xbf/0x10b0 fs/btrfs/qgroup.c:893 stack backtrace: CPU: 1 PID: 8648 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 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 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x6e/0x2a0 fs/super.c:1366 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 RIP: 0033:0x7f080cc260c9 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:00007f080b198168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f080cd45f80 RCX: 00007f080cc260c9 RDX: 0000000020000000 RSI: 00000000c0109428 RDI: 0000000000000004 RBP: 00007f080cc81ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc412807cf R14: 00007f080b198300 R15: 0000000000022000 BTRFS error (device loop1): fail to start transaction for status update: -28 XFS (loop5): SB sanity check failed XFS (loop5): Metadata corruption detected at xfs_sb_read_verify+0x3e7/0x500 fs/xfs/libxfs/xfs_sb.c:685, xfs_sb block 0xffffffffffffffff XFS (loop5): Unmount and run xfs_repair XFS (loop5): First 128 bytes of corrupted metadata buffer: 00000000444745f9: 58 46 53 42 00 00 00 01 00 00 00 00 00 01 00 00 XFSB............ 0000000083c9f5ef: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00000000009653c0: 5e 62 73 b8 21 67 42 bb 91 1b 41 8a a1 4a 12 61 ^bs.!gB...A..J.a 000000000ea93b6f: 00 00 00 00 00 00 80 40 00 00 00 00 00 00 00 20 .......@....... 000000008d40648a: 00 00 00 00 00 00 00 21 00 00 00 00 00 00 00 22 .......!......." 000000000f90a2cf: 00 00 00 08 00 00 80 00 00 00 00 02 00 00 00 00 ................ 000000007f7f6587: 00 00 0b 40 b4 b4 02 00 01 00 00 02 00 00 00 00 ...@............ 00000000332dc773: 00 00 00 00 00 00 00 00 09 09 08 01 0f 00 00 19 ................ XFS (loop5): SB validate failed with error -117. print_req_error: 60 callbacks suppressed print_req_error: I/O error, dev loop1, sector 0 print_req_error: I/O error, dev loop1, sector 0 buffer_io_error: 53 callbacks suppressed Buffer I/O error on dev loop1p4, logical block 0, async page read print_req_error: I/O error, dev loop1, sector 0 Buffer I/O error on dev loop1p4, logical block 0, async page read print_req_error: I/O error, dev loop1, sector 0 Buffer I/O error on dev loop1p4, logical block 0, async page read print_req_error: I/O error, dev loop1, sector 0 Buffer I/O error on dev loop1p4, logical block 0, async page read print_req_error: I/O error, dev loop1, sector 0 Buffer I/O error on dev loop1p4, logical block 0, async page read print_req_error: I/O error, dev loop1, sector 0 Buffer I/O error on dev loop1p4, logical block 0, async page read print_req_error: I/O error, dev loop1, sector 0 Buffer I/O error on dev loop1p4, logical block 0, async page read print_req_error: I/O error, dev loop1, sector 0 Buffer I/O error on dev loop1p4, logical block 0, async page read print_req_error: I/O error, dev loop1, sector 0 Buffer I/O error on dev loop1p4, logical block 0, async page read IPVS: ftp: loaded support on port[0] = 21 kvm: emulating exchange as write blktrace: Concurrent blktraces are not allowed on loop0 IPVS: ftp: loaded support on port[0] = 21 blktrace: Concurrent blktraces are not allowed on loop0 BTRFS info (device loop1): using free space tree BTRFS info (device loop1): has skinny extents IPVS: ftp: loaded support on port[0] = 21 BTRFS error (device loop1): fail to start transaction for status update: -28 blktrace: Concurrent blktraces are not allowed on loop0 blktrace: Concurrent blktraces are not allowed on loop0 BTRFS info (device loop1): using free space tree BTRFS info (device loop1): has skinny extents BTRFS error (device loop1): fail to start transaction for status update: -28 dccp_close: ABORT with 95 bytes unread Buffer I/O error on dev loop1p4, logical block 0, async page read netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy1 wpan1: encryption failed: -22 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. device erspan1 entered promiscuous mode print_req_error: 50 callbacks suppressed print_req_error: I/O error, dev loop1, sector 0 print_req_error: I/O error, dev loop1, sector 0 buffer_io_error: 44 callbacks suppressed Buffer I/O error on dev loop1p4, logical block 0, async page read print_req_error: I/O error, dev loop1, sector 0 Buffer I/O error on dev loop1p4, logical block 0, async page read print_req_error: I/O error, dev loop1, sector 0 Buffer I/O error on dev loop1p4, logical block 0, async page read print_req_error: I/O error, dev loop1, sector 0 Buffer I/O error on dev loop1p4, logical block 0, async page read print_req_error: I/O error, dev loop1, sector 0 Buffer I/O error on dev loop1p4, logical block 0, async page read print_req_error: I/O error, dev loop1, sector 0 Buffer I/O error on dev loop1p4, logical block 0, async page read print_req_error: I/O error, dev loop1, sector 0 Buffer I/O error on dev loop1p4, logical block 0, async page read print_req_error: I/O error, dev loop1, sector 0 Buffer I/O error on dev loop1p4, logical block 0, async page read print_req_error: I/O error, dev loop1, sector 0 Buffer I/O error on dev loop1p4, logical block 0, async page read Buffer I/O error on dev loop1p4, logical block 0, async page read F2FS-fs (loop5): Unrecognized mount option "nobarbier" or missing value F2FS-fs (loop5): Unrecognized mount option "nobarbier" or missing value EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue audit: type=1804 audit(1674995294.147:1020): pid=9601 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir3064931338/syzkaller.cx4sze/178/file0/bus" dev="loop0" ino=18 res=1 EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue audit: type=1804 audit(1674995294.227:1021): pid=9598 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir4138500453/syzkaller.HeiOPq/893/file0/bus" dev="loop1" ino=18 res=1 audit: type=1804 audit(1674995294.227:1022): pid=9626 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.0" name="/root/syzkaller-testdir3064931338/syzkaller.cx4sze/178/file0/bus" dev="loop0" ino=18 res=1 EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue audit: type=1804 audit(1674995294.237:1023): pid=9601 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.0" name="/root/syzkaller-testdir3064931338/syzkaller.cx4sze/178/file0/bus" dev="loop0" ino=18 res=1 audit: type=1804 audit(1674995294.297:1024): pid=9630 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.1" name="/root/syzkaller-testdir4138500453/syzkaller.HeiOPq/893/file0/bus" dev="loop1" ino=18 res=1 audit: type=1804 audit(1674995294.547:1025): pid=9634 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir4138500453/syzkaller.HeiOPq/894/file0/bus" dev="loop1" ino=18 res=1 audit: type=1804 audit(1674995294.617:1026): pid=9654 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.1" name="/root/syzkaller-testdir4138500453/syzkaller.HeiOPq/894/file0/bus" dev="loop1" ino=18 res=1 EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue audit: type=1804 audit(1674995294.627:1027): pid=9654 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.1" name="/root/syzkaller-testdir4138500453/syzkaller.HeiOPq/894/file0/bus" dev="loop1" ino=18 res=1 audit: type=1804 audit(1674995294.627:1028): pid=9657 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir3064931338/syzkaller.cx4sze/179/file0/bus" dev="loop0" ino=18 res=1 audit: type=1804 audit(1674995294.627:1029): pid=9653 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.0" name="/root/syzkaller-testdir3064931338/syzkaller.cx4sze/179/file0/bus" dev="loop0" ino=18 res=1 F2FS-fs (loop4): invalid crc value F2FS-fs (loop4): Found nat_bits in checkpoint F2FS-fs (loop4): f2fs_check_nid_range: out-of-range nid=2, run fsck to fix. F2FS-fs (loop4): Mounted with checkpoint version = 48b305e4