linux-kernel - fat: excessive log spamming due to corrupted fs

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20100422155944.GA22181@sig21.net>
Date:	Thu, 22 Apr 2010 17:59:44 +0200
From:	Johannes Stezenbach <js@...21.net>
To:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
Cc:	linux-kernel@...r.kernel.org
Subject: fat: excessive log spamming due to corrupted fs

Hi,

my office mate has a 1GB USB stick with a currupted vfat fs.

(I don't really know when and how it got currupted.  I
just mounted it, copied a file onto it, unmounted, unplugged.
After that corruption showed up when accessing the newly
copied file.  I'm running 2.6.33.1.)

Mounting still worked but when accessing the new file the kernel
log was filled up with

Apr 22 16:30:18 zzz kernel: FAT: Filesystem error (dev sdb1)
Apr 22 16:30:18 zzz kernel:    fat_get_cluster: invalid cluster chain (i_pos 34568)
Apr 22 16:30:18 zzz kernel:    File system has been set read-only
Apr 22 16:30:18 zzz kernel: FAT: Filesystem error (dev sdb1)
Apr 22 16:30:18 zzz kernel:    fat_get_cluster: invalid cluster chain (i_pos 34568)
Apr 22 16:30:18 zzz kernel: FAT: Filesystem error (dev sdb1)
Apr 22 16:30:18 zzz kernel:    fat_get_cluster: invalid cluster chain (i_pos 34568)
...
Apr 22 16:30:18 zzz kernel: FAT: Filesystem error lidAT: Filesysalid cluster chain (i_pos 34568)
Apr 22 16:30:18 zzz kernel: FAT: Filesystem ealid cluster chain (i_pos 3AT: Fiesysalid cluster chain (i_pos 34568)
Apr 22 16:30:18 zzz kernel: FAT: Filesystem ealid cluster chain (i_pos 3AT: Fesystalid cluster chain (i_pos 34568)
Apr 22 16:30:18 zzz kernel: FAT: Filesystem alid cluster chain (i_pos 3AT: Fiesyalid cluster chain (i_pos 34568)
Apr 22 16:30:18 zzz kernel: FAT: Filesystem ealid cluster chain (i_pos AT: Fiesystalid cluster chain (i_pos 34568)
Apr 22 16:30:18 zzz kernel: FAT: Filesystealid cluster chain (i_pos 3AT: Fiesystalid cluster chain (i_pos 34568)
...
(~10000 lines)

It seems that fat_fs_error() generates corrupted output
(on an Athlon 4850e dual core), and the excessive amounts
of output are IMHO not useful.

BTW: dosfsck refused to fix it.
BTW2: when my office mate plugged it into her MacBook it
caused MacOS to crash ;-)

Johannes
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/