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authorDan Carpenter <dan.carpenter@oracle.com>2011-11-14 17:52:08 +0300
committerGreg Kroah-Hartman <gregkh@suse.de>2011-11-21 14:35:22 -0800
commitb8988229c7eed0ac7967fa212a2a3a5c832e7902 (patch)
treebec6a76ca5060dbe6bf2b29b25f9fb52886fdb43
parentd18c0efc9b76aad26000bb562037a9b675f1c0ae (diff)
hfs: add sanity check for file name length
commit bc5b8a9003132ae44559edd63a1623b7b99dfb68 upstream. On a corrupted file system the ->len field could be wrong leading to a buffer overflow. Reported-and-acked-by: Clement LECIGNE <clement.lecigne@netasq.com> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--fs/hfs/trans.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/hfs/trans.c b/fs/hfs/trans.c
index e673a88b8ae7..b1ce4c7ad3fb 100644
--- a/fs/hfs/trans.c
+++ b/fs/hfs/trans.c
@@ -40,6 +40,8 @@ int hfs_mac2asc(struct super_block *sb, char *out, const struct hfs_name *in)
src = in->name;
srclen = in->len;
+ if (srclen > HFS_NAMELEN)
+ srclen = HFS_NAMELEN;
dst = out;
dstlen = HFS_MAX_NAMELEN;
if (nls_io) {