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ROMFS: fix length used with romfs_dev_strnlen() function

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An interestingly corrupted romfs file system exposed a problem with the
romfs_dev_strnlen function: it's passing the wrong value to its helpers.
Rather than limit the string to the length passed in by the callers, it
uses the size of the device as the limit.

Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Bernd Schmidt 2009-10-06 09:55:26 +01:00 committed by Linus Torvalds
parent c6c5992723
commit ef1f7a7e87
1 changed files with 2 additions and 2 deletions
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4
fs/romfs/storage.c
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@ -253,11 +253,11 @@ ssize_t romfs_dev_strnlen(struct super_block *sb,
#ifdef CONFIG_ROMFS_ON_MTD #ifdef CONFIG_ROMFS_ON_MTD
if (sb->s_mtd) if (sb->s_mtd)
return romfs_mtd_strnlen(sb, pos, limit); return romfs_mtd_strnlen(sb, pos, maxlen);
#endif #endif
#ifdef CONFIG_ROMFS_ON_BLOCK #ifdef CONFIG_ROMFS_ON_BLOCK
if (sb->s_bdev) if (sb->s_bdev)
return romfs_blk_strnlen(sb, pos, limit); return romfs_blk_strnlen(sb, pos, maxlen);
#endif #endif
return -EIO; return -EIO;
} }