linux-ext4 - kernel BUG at ext4

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Date:	Mon, 19 Jan 2009 11:56:33 +0800
From:	Zhang Xiliang <zhangxiliang@...fujitsu.com>
To:	Ext4 Developers List <linux-ext4@...r.kernel.org>
Subject: kernel BUG at ext4_readdir

Hi,

I used soft raid on IA64 and got the following error report.
(I found the type of rec_len is "__u16". But the actual value of rec_len is more than 65535.)

# fdisk -l

Disk /dev/sdc: 881.0 GB, 881005166592 bytes
255 heads, 63 sectors/track, 107109 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x0000544c

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1               1      107109   860353011   fd  Linux raid autodetect
...
   Device Boot      Start         End      Blocks   Id  System
/dev/sdd1               1      107109   860353011   fd  Linux raid autodetect
...
   Device Boot      Start         End      Blocks   Id  System
/dev/sde1               1      107109   860353011   fd  Linux raid autodetect
...
   Device Boot      Start         End      Blocks   Id  System
/dev/sdf1               1      107109   860353011   fd  Linux raid autodetect

# mdadm --create /dev/md0 --level=0 --raid-devices=4 /dev/sdc1 /dev/sdd1 /dev/sde1 \
/dev/sdf1 
# mkfs.ext4 -b 65536 /dev/md0
# mount -t ext4 /dev/md0 /mnt
# cd /mnt
# dd if=/dev/zero of=tmp_file bs=1M count=1000
# dmesg

EXT4-fs error (device md0): ext4_readdir: bad entry in directory #11: rec_len
is smaller than minimal - offset=0, inode=0, rec_len=0, name_len=0
EXT4-fs error (device md0): empty_dir: bad entry in directory #11: rec_len is
smaller than minimal - offset=65536, inode=0, rec_len=0, name_len=0

--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html