tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.5/28921 is trying to acquire lock: 00000000f74d699b (&ovl_i_mutex_dir_key[depth]){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] 00000000f74d699b (&ovl_i_mutex_dir_key[depth]){++++}, at: lookup_slow fs/namei.c:1688 [inline] 00000000f74d699b (&ovl_i_mutex_dir_key[depth]){++++}, at: walk_component+0x798/0xda0 fs/namei.c:1811 but task is already holding lock: 000000006d5f4b0e (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1419 [inline] 000000006d5f4b0e (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file+0x38c/0x2360 fs/exec.c:1762 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&sig->cred_guard_mutex){+.+.}: do_io_accounting fs/proc/base.c:2750 [inline] proc_tgid_io_accounting+0x1cf/0x7f0 fs/proc/base.c:2799 proc_single_show+0xeb/0x170 fs/proc/base.c:755 seq_read+0x4e0/0x11c0 fs/seq_file.c:232 __vfs_read+0xf7/0x750 fs/read_write.c:416 vfs_read+0x194/0x3c0 fs/read_write.c:452 ksys_read+0x12b/0x2a0 fs/read_write.c:579 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #2 (&p->lock){+.+.}: seq_read+0x6b/0x11c0 fs/seq_file.c:164 proc_reg_read+0x1bd/0x2d0 fs/proc/inode.c:231 do_loop_readv_writev fs/read_write.c:701 [inline] do_loop_readv_writev fs/read_write.c:688 [inline] do_iter_read+0x471/0x630 fs/read_write.c:925 vfs_readv+0xe5/0x150 fs/read_write.c:987 kernel_readv fs/splice.c:362 [inline] default_file_splice_read+0x457/0xa00 fs/splice.c:417 do_splice_to+0x10e/0x160 fs/splice.c:881 splice_direct_to_actor+0x2b9/0x8d0 fs/splice.c:959 do_splice_direct+0x1a7/0x270 fs/splice.c:1068 do_sendfile+0x550/0xc30 fs/read_write.c:1447 __do_sys_sendfile64 fs/read_write.c:1508 [inline] __se_sys_sendfile64+0x147/0x160 fs/read_write.c:1494 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #1 (sb_writers#3){.+.+}: sb_start_write include/linux/fs.h:1579 [inline] mnt_want_write+0x3a/0xb0 fs/namespace.c:360 ovl_rename+0x22b/0x1a50 fs/overlayfs/dir.c:1084 vfs_rename+0x67e/0x1bc0 fs/namei.c:4479 do_renameat2+0xb59/0xc70 fs/namei.c:4629 __do_sys_rename fs/namei.c:4675 [inline] __se_sys_rename fs/namei.c:4673 [inline] __x64_sys_rename+0x5d/0x80 fs/namei.c:4673 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&ovl_i_mutex_dir_key[depth]){++++}: down_read+0x36/0x80 kernel/locking/rwsem.c:24 inode_lock_shared include/linux/fs.h:758 [inline] lookup_slow fs/namei.c:1688 [inline] walk_component+0x798/0xda0 fs/namei.c:1811 link_path_walk.part.0+0x901/0x1230 fs/namei.c:2142 link_path_walk fs/namei.c:2073 [inline] path_openat+0x1db/0x2df0 fs/namei.c:3536 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_open_execat+0x11d/0x5b0 fs/exec.c:853 __do_execve_file+0x1a8b/0x2360 fs/exec.c:1770 do_execveat_common fs/exec.c:1879 [inline] do_execve+0x35/0x50 fs/exec.c:1896 __do_sys_execve fs/exec.c:1977 [inline] __se_sys_execve fs/exec.c:1972 [inline] __x64_sys_execve+0x7c/0xa0 fs/exec.c:1972 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: Chain exists of: &ovl_i_mutex_dir_key[depth] --> &p->lock --> &sig->cred_guard_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sig->cred_guard_mutex); lock(&p->lock); lock(&sig->cred_guard_mutex); lock(&ovl_i_mutex_dir_key[depth]); *** DEADLOCK *** 1 lock held by syz-executor.5/28921: #0: 000000006d5f4b0e (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1419 [inline] #0: 000000006d5f4b0e (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file+0x38c/0x2360 fs/exec.c:1762 stack backtrace: CPU: 0 PID: 28921 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 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 down_read+0x36/0x80 kernel/locking/rwsem.c:24 inode_lock_shared include/linux/fs.h:758 [inline] lookup_slow fs/namei.c:1688 [inline] walk_component+0x798/0xda0 fs/namei.c:1811 link_path_walk.part.0+0x901/0x1230 fs/namei.c:2142 link_path_walk fs/namei.c:2073 [inline] path_openat+0x1db/0x2df0 fs/namei.c:3536 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_open_execat+0x11d/0x5b0 fs/exec.c:853 __do_execve_file+0x1a8b/0x2360 fs/exec.c:1770 do_execveat_common fs/exec.c:1879 [inline] do_execve+0x35/0x50 fs/exec.c:1896 __do_sys_execve fs/exec.c:1977 [inline] __se_sys_execve fs/exec.c:1972 [inline] __x64_sys_execve+0x7c/0xa0 fs/exec.c:1972 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f4eb6ca4109 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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:00007f4eb5619168 EFLAGS: 00000246 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 00007f4eb6db6f60 RCX: 00007f4eb6ca4109 RDX: 0000000020000b40 RSI: 0000000020000500 RDI: 0000000020000340 RBP: 00007f4eb6cfe08d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffffa71cdcf R14: 00007f4eb5619300 R15: 0000000000022000 EXT4-fs error (device loop3): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 50 vs 25 free clusters IPVS: ftp: loaded support on port[0] = 21 overlayfs: overlapping lowerdir path EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' EXT4-fs error (device loop3): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 50 vs 25 free clusters EXT4-fs error (device loop2): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 50 vs 25 free clusters IPVS: ftp: loaded support on port[0] = 21 EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs error (device loop3): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 50 vs 25 free clusters IPVS: ftp: loaded support on port[0] = 21 EXT4-fs error (device loop2): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 50 vs 25 free clusters EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs error (device loop0): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 50 vs 25 free clusters EXT4-fs error (device loop2): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 50 vs 25 free clusters tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. EXT4-fs (loop0): Unrecognized mount option "@" or missing value EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue kauditd_printk_skb: 24 callbacks suppressed audit: type=1800 audit(1654278959.891:4199): pid=29244 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="file0" dev="sda1" ino=14278 res=0 overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' audit: type=1804 audit(1654278959.901:4200): pid=29243 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir1167573727/syzkaller.700keU/2269/file0" dev="sda1" ino=14278 res=1 overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' EXT4-fs (loop0): Unrecognized mount option "@" or missing value audit: type=1800 audit(1654278960.121:4201): pid=29257 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="file0" dev="sda1" ino=14039 res=0 EXT4-fs (loop0): Unrecognized mount option "@" or missing value audit: type=1804 audit(1654278960.121:4202): pid=29257 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir1167573727/syzkaller.700keU/2270/file0" dev="sda1" ino=14039 res=1 audit: type=1800 audit(1654278960.271:4203): pid=29263 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.1" name="bus" dev="sda1" ino=13898 res=0 overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' audit: type=1800 audit(1654278960.391:4204): pid=29290 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="file0" dev="sda1" ino=13914 res=0 audit: type=1804 audit(1654278960.401:4205): pid=29290 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir1167573727/syzkaller.700keU/2271/file0" dev="sda1" ino=13914 res=1 EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue audit: type=1800 audit(1654278960.691:4206): pid=29309 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="file0" dev="sda1" ino=13893 res=0 audit: type=1800 audit(1654278960.881:4207): pid=29351 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="file0" dev="sda1" ino=13953 res=0 overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' audit: type=1804 audit(1654278960.881:4208): pid=29350 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir1167573727/syzkaller.700keU/2273/file0" dev="sda1" ino=13953 res=1 overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs error (device loop2): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 50 vs 25 free clusters tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' ADFS-fs: unrecognised mount option "/dev/cachefiles" or missing value ADFS-fs: unrecognised mount option "/dev/cachefiles" or missing value tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue ADFS-fs: unrecognised mount option "/dev/cachefiles" or missing value EXT4-fs error (device loop2): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 50 vs 25 free clusters overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. EXT4-fs error (device loop2): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 50 vs 25 free clusters EXT4-fs error (device loop0): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 50 vs 25 free clusters EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs error (device loop2): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 50 vs 25 free clusters overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' kauditd_printk_skb: 66 callbacks suppressed audit: type=1800 audit(1654278964.912:4275): pid=29658 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="file0" dev="sda1" ino=13993 res=0 tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. audit: type=1804 audit(1654278964.952:4276): pid=29658 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir1167573727/syzkaller.700keU/2291/file0" dev="sda1" ino=13993 res=1 EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue audit: type=1800 audit(1654278965.462:4277): pid=29699 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="file0" dev="sda1" ino=13959 res=0 audit: type=1804 audit(1654278965.492:4278): pid=29699 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir1167573727/syzkaller.700keU/2292/file0" dev="sda1" ino=13959 res=1 overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' audit: type=1800 audit(1654278965.572:4279): pid=29707 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="sda1" ino=14009 res=0 EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue overlayfs: overlapping lowerdir path audit: type=1800 audit(1654278965.922:4280): pid=29743 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="file0" dev="sda1" ino=13992 res=0 EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue audit: type=1804 audit(1654278965.942:4281): pid=29743 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir1167573727/syzkaller.700keU/2294/file0" dev="sda1" ino=13992 res=1 overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. EXT4-fs error (device loop2): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 50 vs 25 free clusters tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' audit: type=1800 audit(1654278966.022:4282): pid=29751 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="sda1" ino=13903 res=0 audit: type=1800 audit(1654278966.152:4283): pid=29780 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="file0" dev="sda1" ino=14074 res=0 VFS: unable to find oldfs superblock on device loop1 overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' audit: type=1804 audit(1654278966.172:4284): pid=29780 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir1167573727/syzkaller.700keU/2295/file0" dev="sda1" ino=14074 res=1 overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. VFS: unable to find oldfs superblock on device loop1 VFS: unable to find oldfs superblock on device loop1 VFS: unable to find oldfs superblock on device loop0 tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. tmpfs: No value for mount option '*I͇f-h)C|uy|r >>L5'U$lU;dZ}ĵT)' EXT4-fs error (device loop2): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 50 vs 25 free clusters