====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.0/14405 is trying to acquire lock: 00000000510db904 (&fs_info->qgroup_ioctl_lock){+.+.}, at: btrfs_qgroup_inherit+0xde/0x1c60 fs/btrfs/qgroup.c:2284 but task is already holding lock: 00000000910f34d4 (sb_internal#2){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] 00000000910f34d4 (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_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+0x114/0x170 fs/btrfs/ioctl.c:1819 btrfs_ioctl+0x274b/0x76d0 fs/btrfs/ioctl.c:5932 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#2); lock(&fs_info->qgroup_ioctl_lock); lock(sb_internal#2); lock(&fs_info->qgroup_ioctl_lock); *** DEADLOCK *** 4 locks held by syz-executor.0/14405: #0: 000000003e027b6a (sb_writers#18){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 000000003e027b6a (sb_writers#18){.+.+}, at: mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418 #1: 00000000084dc32a (&type->i_mutex_dir_key#11/1){+.+.}, at: btrfs_mksubvol+0x156/0x1160 fs/btrfs/ioctl.c:975 #2: 0000000031b39d39 (&fs_info->subvol_sem){++++}, at: btrfs_mksubvol+0x35b/0x1160 fs/btrfs/ioctl.c:998 #3: 00000000910f34d4 (sb_internal#2){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] #3: 00000000910f34d4 (sb_internal#2){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528 stack backtrace: CPU: 0 PID: 14405 Comm: syz-executor.0 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_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+0x114/0x170 fs/btrfs/ioctl.c:1819 btrfs_ioctl+0x274b/0x76d0 fs/btrfs/ioctl.c:5932 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: 0033:0x7f166a3920c9 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:00007f1668904168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f166a4b1f80 RCX: 00007f166a3920c9 RDX: 00000000200000c0 RSI: 000000005000940e RDI: 0000000000000005 RBP: 00007f166a3edae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc37a9a2ff R14: 00007f1668904300 R15: 0000000000022000 BTRFS info (device loop0): using free space tree BTRFS info (device loop0): has skinny extents EXT4-fs (loop1): Unrecognized mount option "i_verion" or missing value EXT4-fs (loop1): Unrecognized mount option "i_verion" or missing value kauditd_printk_skb: 2 callbacks suppressed audit: type=1804 audit(1673846661.830:85): pid=14685 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir1595112420/syzkaller.Vy7AjJ/73/cgroup.controllers" dev="sda1" ino=14441 res=1 netlink: zone id is out of range EXT4-fs warning (device sda1): ext4_resize_begin:72: There are errors in the filesystem, so online resizing is not allowed audit: type=1804 audit(1673846662.330:86): pid=14705 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir3689002516/syzkaller.8OvY7s/97/cgroup.controllers" dev="sda1" ino=14480 res=1 netlink: zone id is out of range netlink: zone id is out of range EXT4-fs warning (device sda1): ext4_resize_begin:72: There are errors in the filesystem, so online resizing is not allowed audit: type=1804 audit(1673846662.400:87): pid=14707 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir1595112420/syzkaller.Vy7AjJ/75/cgroup.controllers" dev="sda1" ino=14437 res=1 IPVS: ftp: loaded support on port[0] = 21 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.2'. F2FS-fs (loop1): invalid crc value F2FS-fs (loop1): f2fs_check_nid_range: out-of-range nid=2, run fsck to fix. F2FS-fs (loop1): Mounted with checkpoint version = 48b305e5 F2FS-fs (loop1): sanity_check_inode: inode (ino=4) has corrupted i_extra_isize: 36, max: 24 F2FS-fs (loop1): sanity_check_inode: inode (ino=4) has corrupted i_extra_isize: 36, max: 24 F2FS-fs (loop1): sanity_check_inode: inode (ino=4) has corrupted i_extra_isize: 36, max: 24 F2FS-fs (loop1): sanity_check_inode: inode (ino=4) has corrupted i_extra_isize: 36, max: 24 F2FS-fs (loop1): sanity_check_inode: inode (ino=4) has corrupted i_extra_isize: 36, max: 24 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.2'. audit: type=1804 audit(1673846663.440:88): pid=14815 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir3689002516/syzkaller.8OvY7s/98/cgroup.controllers" dev="sda1" ino=14489 res=1 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: zone id is out of range IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. audit: type=1804 audit(1673846664.090:89): pid=14979 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir3689002516/syzkaller.8OvY7s/99/cgroup.controllers" dev="sda1" ino=14502 res=1 netlink: zone id is out of range IPVS: ftp: loaded support on port[0] = 21 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. audit: type=1804 audit(1673846664.670:90): pid=15021 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir3689002516/syzkaller.8OvY7s/100/cgroup.controllers" dev="sda1" ino=14496 res=1 netlink: zone id is out of range F2FS-fs (loop1): invalid crc value F2FS-fs (loop1): f2fs_check_nid_range: out-of-range nid=2, run fsck to fix. IPVS: ftp: loaded support on port[0] = 21 audit: type=1804 audit(1673846665.340:91): pid=15061 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir3689002516/syzkaller.8OvY7s/101/cgroup.controllers" dev="sda1" ino=14511 res=1 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. audit: type=1804 audit(1673846665.380:92): pid=15056 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir1766917883/syzkaller.UHSjsx/67/cgroup.controllers" dev="sda1" ino=14508 res=1 netlink: zone id is out of range netlink: zone id is out of range IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 audit: type=1804 audit(1673846665.980:93): pid=15152 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir1766917883/syzkaller.UHSjsx/68/cgroup.controllers" dev="sda1" ino=14499 res=1 netlink: zone id is out of range netlink: zone id is out of range audit: type=1804 audit(1673846666.020:94): pid=15154 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir3689002516/syzkaller.8OvY7s/102/cgroup.controllers" dev="sda1" ino=14517 res=1 IPVS: ftp: loaded support on port[0] = 21 kauditd_printk_skb: 1 callbacks suppressed audit: type=1804 audit(1673846667.010:96): pid=15218 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir3689002516/syzkaller.8OvY7s/103/cgroup.controllers" dev="sda1" ino=14512 res=1 net_ratelimit: 1 callbacks suppressed netlink: zone id is out of range netlink: zone id is out of range audit: type=1804 audit(1673846667.060:97): pid=15224 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir1595112420/syzkaller.Vy7AjJ/81/cgroup.controllers" dev="sda1" ino=14510 res=1 IPVS: ftp: loaded support on port[0] = 21 audit: type=1804 audit(1673846667.370:98): pid=15265 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir1766917883/syzkaller.UHSjsx/70/cgroup.controllers" dev="sda1" ino=14523 res=1 netlink: zone id is out of range netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: zone id is out of range audit: type=1804 audit(1673846667.420:99): pid=15269 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir3689002516/syzkaller.8OvY7s/104/cgroup.controllers" dev="sda1" ino=14512 res=1 IPVS: ftp: loaded support on port[0] = 21 audit: type=1804 audit(1673846667.870:100): pid=15314 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir3689002516/syzkaller.8OvY7s/105/cgroup.controllers" dev="sda1" ino=14496 res=1 netlink: zone id is out of range netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. audit: type=1804 audit(1673846668.030:101): pid=15339 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir1595112420/syzkaller.Vy7AjJ/82/cgroup.controllers" dev="sda1" ino=14508 res=1 netlink: zone id is out of range IPVS: ftp: loaded support on port[0] = 21 audit: type=1804 audit(1673846668.821:102): pid=15384 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir1595112420/syzkaller.Vy7AjJ/83/cgroup.controllers" dev="sda1" ino=14534 res=1 netlink: zone id is out of range netlink: zone id is out of range netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. audit: type=1804 audit(1673846668.851:103): pid=15377 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir3689002516/syzkaller.8OvY7s/106/cgroup.controllers" dev="sda1" ino=14532 res=1 audit: type=1804 audit(1673846669.081:104): pid=15430 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir1766917883/syzkaller.UHSjsx/72/cgroup.controllers" dev="sda1" ino=14533 res=1 netlink: zone id is out of range IPVS: ftp: loaded support on port[0] = 21 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. audit: type=1804 audit(1673846669.291:105): pid=15445 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir1595112420/syzkaller.Vy7AjJ/84/cgroup.controllers" dev="sda1" ino=14534 res=1 netlink: zone id is out of range IPVS: ftp: loaded support on port[0] = 21 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. IPVS: ftp: loaded support on port[0] = 21 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'.