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authorLars-Peter Clausen <lars@metafoo.de>2013-03-09 15:28:44 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-03-20 12:58:51 -0700
commit64365ddb08f27f2583f2323a147520fed192ef40 (patch)
treef967ce77625ae8b971c3cb20eb9855da6e86c74d /fs/ext3
parent42cd41128edb092f9ae6fe89dbb5456963568602 (diff)
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ext3: Fix format string issues
commit 8d0c2d10dd72c5292eda7a06231056a4c972e4cc upstream. ext3_msg() takes the printk prefix as the second parameter and the format string as the third parameter. Two callers of ext3_msg omit the prefix and pass the format string as the second parameter and the first parameter to the format string as the third parameter. In both cases this string comes from an arbitrary source. Which means the string may contain format string characters, which will lead to undefined and potentially harmful behavior. The issue was introduced in commit 4cf46b67eb("ext3: Unify log messages in ext3") and is fixed by this patch. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/ext3')
-rw-r--r--fs/ext3/super.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index aad153e..ba57a63 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -371,7 +371,7 @@ static struct block_device *ext3_blkdev_get(dev_t dev, struct super_block *sb)
return bdev;
fail:
- ext3_msg(sb, "error: failed to open journal device %s: %ld",
+ ext3_msg(sb, KERN_ERR, "error: failed to open journal device %s: %ld",
__bdevname(dev, b), PTR_ERR(bdev));
return NULL;
@@ -892,7 +892,7 @@ static ext3_fsblk_t get_sb_block(void **data, struct super_block *sb)
/*todo: use simple_strtoll with >32bit ext3 */
sb_block = simple_strtoul(options, &options, 0);
if (*options && *options != ',') {
- ext3_msg(sb, "error: invalid sb specification: %s",
+ ext3_msg(sb, KERN_ERR, "error: invalid sb specification: %s",
(char *) *data);
return 1;
}