Evan Tang : kernel32/lzexpand: Fix uninitialized read in read_header.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 4e9dae37767462c531f489fab13980f210b32da6
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=4e9dae37767462c531f489fab13980f210b32da6

Author: Evan Tang <etang110 at gmail.com>
Date:   Mon Jan 27 02:13:41 2020 -0600

kernel32/lzexpand: Fix uninitialized read in read_header.

read_header calls _lread which can either return the number of characters read
or HFILE_ERROR (-1), cast to a UINT.

Signed-off-by: Evan Tang <etang110 at gmail.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/kernel32/lzexpand.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/kernel32/lzexpand.c b/dlls/kernel32/lzexpand.c
index 4b2ec2ed45..73c9ddc031 100644
--- a/dlls/kernel32/lzexpand.c
+++ b/dlls/kernel32/lzexpand.c
@@ -139,7 +139,7 @@ static INT read_header(HFILE fd,struct lzfileheader *head)
 	/* We can't directly read the lzfileheader struct due to
 	 * structure element alignment
 	 */
-	if (_lread(fd,buf,LZ_HEADER_LEN)<LZ_HEADER_LEN)
+	if (_lread(fd,buf,LZ_HEADER_LEN) != LZ_HEADER_LEN)
 		return 0;
 	memcpy(head->magic,buf,LZ_MAGIC_LEN);
 	memcpy(&(head->compressiontype),buf+LZ_MAGIC_LEN,1);