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-rw-r--r--coreutils/dos2unix.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/coreutils/dos2unix.c b/coreutils/dos2unix.c
index c8cebcec7..df0b4f977 100644
--- a/coreutils/dos2unix.c
+++ b/coreutils/dos2unix.c
@@ -64,7 +64,9 @@ static int convert(char *fn, int ConvType)
c = strlen(tempFn);
tempFn[c] = '.';
while(1) {
- if (c >=BUFSIZ-2)
+ /* tempFn is BUFSIZ so the last addressable spot it BUFSIZ-1.
+ * The loop increments by 2. So this must check for BUFSIZ-3. */
+ if (c >=BUFSIZ-3)
bb_error_msg_and_die("unique name not found");
/* Get some semi random stuff to try and make a
* random filename based (and in the same dir as)