Author: pfg
Date: Sat Apr 23 18:28:59 2016
New Revision: 298518
URL: https://svnweb.freebsd.org/changeset/base/298518
Log:
ext2_htree_release(): prevent signed integer overflow in a loop.
h_levels_num, as most data structs in ext2fs, is unsigned so
the index that addresses it has to be unsigned as well.
To get to overflow here we would probably be considering a
degenerate case though.
MFC after: 5 days
Modified:
head/sys/fs/ext2fs/ext2_htree.c
Modified: head/sys/fs/ext2fs/ext2_htree.c
==============================================================================
--- head/sys/fs/ext2fs/ext2_htree.c Sat Apr 23 17:09:40 2016
(r298517)
+++ head/sys/fs/ext2fs/ext2_htree.c Sat Apr 23 18:28:59 2016
(r298518)
@@ -191,7 +191,7 @@ ext2_htree_set_limit(struct ext2fs_htree
static void
ext2_htree_release(struct ext2fs_htree_lookup_info *info)
{
- int i;
+ u_int i;
for (i = 0; i < info->h_levels_num; i++) {
struct buf *bp = info->h_levels[i].h_bp;
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