kconfig: loop boundary condition fix

[carl9170fw.git] / config / preprocess.c

diff --git a/config/preprocess.c b/config/preprocess.c
index 65da87fce907ad2bc7b52adba4651dc2c32786be..5ca2df790d3cfa5f4253a33a303219aaa8fc4394 100644 (file)
--- a/config/preprocess.c
+++ b/config/preprocess.c
@@ -156,7 +156,7 @@ static char *do_shell(int argc, char *argv[])
                nread--;
 
        /* remove trailing new lines */
-       while (buf[nread - 1] == '\n')
+       while (nread > 0 && buf[nread - 1] == '\n')
                nread--;
 
        buf[nread] = 0;