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authorStefan Hajnoczi <stefanha@redhat.com>2016-02-18 21:55:54 +0300
committerJ. Bruce Fields <bfields@redhat.com>2016-02-23 21:20:16 +0300
commitb7052cd7bcf3c1478796e93e3dff2b44c9e82943 (patch)
tree2264d2685b4de8bd3807e80bdafac468265acf5e /net/sunrpc/cache.c
parent18558cae0272f8fd9647e69d3fec1565a7949865 (diff)
downloadlinux-b7052cd7bcf3c1478796e93e3dff2b44c9e82943.tar.xz
sunrpc/cache: fix off-by-one in qword_get()
The qword_get() function NUL-terminates its output buffer. If the input string is in hex format \xXXXX... and the same length as the output buffer, there is an off-by-one: int qword_get(char **bpp, char *dest, int bufsize) { ... while (len < bufsize) { ... *dest++ = (h << 4) | l; len++; } ... *dest = '\0'; return len; } This patch ensures the NUL terminator doesn't fall outside the output buffer. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'net/sunrpc/cache.c')
-rw-r--r--net/sunrpc/cache.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index 2b32fd602669..273bc3a35425 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -1225,7 +1225,7 @@ int qword_get(char **bpp, char *dest, int bufsize)
if (bp[0] == '\\' && bp[1] == 'x') {
/* HEX STRING */
bp += 2;
- while (len < bufsize) {
+ while (len < bufsize - 1) {
int h, l;
h = hex_to_bin(bp[0]);