dhcpcd: Fix off-by-one overflow when read() writes full BUFSIZ (#236)

diff --git a/src/dhcpcd.c b/src/dhcpcd.c
index e06733d318bc30ad6f5af7af849a2067224b9d4f..688a3a6d3d5b61183732484aba3de943edd3841a 100644 (file)
--- a/src/dhcpcd.c
+++ b/src/dhcpcd.c
@@ -1822,7 +1822,7 @@ dhcpcd_stderr_cb(void *arg, unsigned short events)
        if (!(events & ELE_READ))
                return;
 
-       len = read(ctx->stderr_fd, log, sizeof(log));
+       len = read(ctx->stderr_fd, log, sizeof(log) - 1);
        if (len == -1) {
                if (errno != ECONNRESET)
                        logerr(__func__);