BTRFS info (device loop3): force zlib compression, level 3 BTRFS info (device loop3): using free space tree BTRFS info (device loop3): has skinny extents netlink: 600 bytes leftover after parsing attributes in process `syz-executor.2'. ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.3/28192 is trying to acquire lock: 000000007345d03a (&fs_info->qgroup_ioctl_lock){+.+.}, at: btrfs_qgroup_inherit+0xde/0x1c60 fs/btrfs/qgroup.c:2284 but task is already holding lock: 00000000e62d98c7 (sb_internal#4){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] 00000000e62d98c7 (sb_internal#4){.+.+}, 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#4){.+.+}: 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 BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor.4 (28289) 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_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 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sb_internal#4); lock(&fs_info->qgroup_ioctl_lock); lock(sb_internal#4); lock(&fs_info->qgroup_ioctl_lock); *** DEADLOCK *** 4 locks held by syz-executor.3/28192: #0: 0000000083da4dda (sb_writers#26){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 0000000083da4dda (sb_writers#26){.+.+}, at: mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418 #1: 00000000696506a8 (&type->i_mutex_dir_key#15/1){+.+.}, at: btrfs_mksubvol+0x156/0x1160 fs/btrfs/ioctl.c:975 #2: 00000000a83d9154 (&fs_info->subvol_sem){++++}, at: btrfs_mksubvol+0x35b/0x1160 fs/btrfs/ioctl.c:998 #3: 00000000e62d98c7 (sb_internal#4){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] #3: 00000000e62d98c7 (sb_internal#4){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528 stack backtrace: CPU: 0 PID: 28192 Comm: syz-executor.3 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 __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 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 RIP: 0033:0x7ff6682da0c9 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:00007ff66684c168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ff6683f9f80 RCX: 00007ff6682da0c9 RDX: 0000000020000a80 RSI: 0000000050009418 RDI: 0000000000000004 RBP: 00007ff668335ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdbc74e26f R14: 00007ff66684c300 R15: 0000000000022000 ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy1 wpan1: encryption failed: -22 BTRFS info (device loop1): unrecognized mount option 'userbvol_rm_alloWed' netlink: 8 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 600 bytes leftover after parsing attributes in process `syz-executor.2'. BTRFS error (device loop1): open_ctree failed netlink: 8 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 600 bytes leftover after parsing attributes in process `syz-executor.2'. BTRFS info (device loop4): enabling inode map caching BTRFS warning (device loop4): excessive commit interval 620990646 BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor.3 (28365) BTRFS info (device loop4): force zlib compression, level 3 BTRFS info (device loop4): using free space tree BTRFS info (device loop4): has skinny extents BTRFS error (device loop4): fail to start transaction for status update: -28 netlink: 8 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.0'. BTRFS info (device loop1): unrecognized mount option 'userbvol_rm_alloWed' BTRFS error (device loop1): open_ctree failed netlink: 8 bytes leftover after parsing attributes in process `syz-executor.0'. BTRFS info (device loop3): enabling inode map caching BTRFS warning (device loop3): excessive commit interval 620990646 BTRFS info (device loop3): force zlib compression, level 3 BTRFS info (device loop3): using free space tree BTRFS info (device loop3): has skinny extents BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor.4 (28483) BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor.1 (28533) BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 8 scanned by systemd-udevd (28511) BTRFS info (device loop3): enabling inode map caching BTRFS warning (device loop3): excessive commit interval 620990646 BTRFS info (device loop3): force zlib compression, level 3 BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor.4 (28565) BTRFS info (device loop3): using free space tree BTRFS info (device loop3): has skinny extents BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor.1 (28567) BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 8 scanned by systemd-udevd (28595) BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 8 scanned by systemd-udevd (28593) BTRFS info (device loop4): enabling inode map caching BTRFS warning (device loop4): excessive commit interval 620990646 BTRFS info (device loop4): force zlib compression, level 3 BTRFS info (device loop4): using free space tree BTRFS info (device loop4): has skinny extents BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor.1 (28620) BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 8 scanned by systemd-udevd (28633) BTRFS error (device loop4): fail to start transaction for status update: -28 BTRFS info (device loop3): enabling inode map caching BTRFS warning (device loop3): excessive commit interval 620990646 BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor.1 (28669) BTRFS info (device loop3): force zlib compression, level 3 BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 8 scanned by systemd-udevd (28692) BTRFS info (device loop3): using free space tree BTRFS info (device loop3): has skinny extents FAT-fs (loop1): Unrecognized mount option "fmask=000000" or missing value BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor.4 (28693) FAT-fs (loop1): Unrecognized mount option "fmask=000000" or missing value BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 8 scanned by systemd-udevd (28696) REISERFS (device loop1): found reiserfs format "3.6" with non-standard journal REISERFS (device loop1): using ordered data mode reiserfs: using flush barriers REISERFS (device loop1): journal params: device loop1, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop1): checking transaction log (loop1) BTRFS info (device loop3): enabling inode map caching BTRFS warning (device loop3): excessive commit interval 620990646 BTRFS info (device loop3): force zlib compression, level 3 BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor.4 (28766) REISERFS (device loop1): Using r5 hash to sort names BTRFS info (device loop3): using free space tree REISERFS (device loop1): Created .reiserfs_priv - reserved for xattr storage. BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 8 scanned by systemd-udevd (28817) BTRFS info (device loop3): has skinny extents audit: type=1804 audit(1674729954.995:376): pid=28777 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir331270753/syzkaller.FXOxH2/142/file1/bus" dev="loop1" ino=4 res=1 audit: type=1804 audit(1674729955.105:377): pid=28844 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.1" name="/root/syzkaller-testdir331270753/syzkaller.FXOxH2/142/file1/bus" dev="loop1" ino=4 res=1 REISERFS (device loop1): found reiserfs format "3.6" with non-standard journal REISERFS (device loop1): using ordered data mode BTRFS info (device loop4): enabling inode map caching reiserfs: using flush barriers audit: type=1804 audit(1674729955.615:378): pid=28865 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir2191967269/syzkaller.94gdpc/623/bus" dev="sda1" ino=14386 res=1 REISERFS (device loop1): journal params: device loop1, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 BTRFS warning (device loop4): excessive commit interval 620990646 BTRFS info (device loop4): force zlib compression, level 3 REISERFS (device loop1): checking transaction log (loop1) BTRFS info (device loop4): using free space tree BTRFS info (device loop4): has skinny extents audit: type=1804 audit(1674729955.765:379): pid=28902 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.2" name="/root/syzkaller-testdir2191967269/syzkaller.94gdpc/623/bus" dev="sda1" ino=14386 res=1 REISERFS (device loop1): Using r5 hash to sort names REISERFS (device loop1): Created .reiserfs_priv - reserved for xattr storage. audit: type=1804 audit(1674729955.945:380): pid=28866 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir331270753/syzkaller.FXOxH2/143/file1/bus" dev="loop1" ino=4 res=1 audit: type=1804 audit(1674729956.035:381): pid=28928 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.1" name="/root/syzkaller-testdir331270753/syzkaller.FXOxH2/143/file1/bus" dev="loop1" ino=4 res=1 BTRFS error (device loop4): fail to start transaction for status update: -28 audit: type=1804 audit(1674729956.125:382): pid=28913 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir2191967269/syzkaller.94gdpc/624/bus" dev="sda1" ino=14178 res=1 audit: type=1804 audit(1674729956.236:383): pid=28958 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.2" name="/root/syzkaller-testdir2191967269/syzkaller.94gdpc/624/bus" dev="sda1" ino=14178 res=1 BTRFS info (device loop3): enabling inode map caching BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 12 scanned by systemd-udevd (28957) BTRFS warning (device loop3): excessive commit interval 620990646 REISERFS (device loop1): found reiserfs format "3.6" with non-standard journal REISERFS (device loop1): using ordered data mode reiserfs: using flush barriers REISERFS (device loop1): journal params: device loop1, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 BTRFS info (device loop3): force zlib compression, level 3 REISERFS (device loop1): checking transaction log (loop1) BTRFS info (device loop3): using free space tree BTRFS info (device loop3): has skinny extents REISERFS (device loop1): Using r5 hash to sort names REISERFS (device loop1): Created .reiserfs_priv - reserved for xattr storage. BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor.4 (28979) audit: type=1804 audit(1674729956.786:384): pid=28968 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir331270753/syzkaller.FXOxH2/144/file1/bus" dev="loop1" ino=4 res=1 BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 8 scanned by systemd-udevd (29015) audit: type=1804 audit(1674729956.866:385): pid=29019 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.1" name="/root/syzkaller-testdir331270753/syzkaller.FXOxH2/144/file1/bus" dev="loop1" ino=4 res=1 REISERFS (device loop1): found reiserfs format "3.6" with non-standard journal REISERFS (device loop1): using ordered data mode reiserfs: using flush barriers REISERFS (device loop1): journal params: device loop1, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop1): checking transaction log (loop1) BTRFS info (device loop4): enabling inode map caching BTRFS warning (device loop4): excessive commit interval 620990646 BTRFS info (device loop4): force zlib compression, level 3 BTRFS info (device loop4): using free space tree REISERFS (device loop1): Using r5 hash to sort names REISERFS (device loop1): Created .reiserfs_priv - reserved for xattr storage. BTRFS info (device loop4): has skinny extents BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor.3 (29063) BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 8 scanned by systemd-udevd (29103) BTRFS info (device loop3): enabling inode map caching BTRFS warning (device loop3): excessive commit interval 620990646 BTRFS info (device loop3): force zlib compression, level 3 BTRFS info (device loop3): using free space tree BTRFS info (device loop3): has skinny extents BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor.4 (29150) BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 8 scanned by systemd-udevd (29226) IPVS: ftp: loaded support on port[0] = 21 XFS (loop1): DAX enabled. Warning: EXPERIMENTAL, use at your own risk XFS (loop1): DAX unsupported by block device. Turning off DAX. XFS (loop1): Mounting V4 Filesystem