From: Felix Fietkau <nbd@nbd.name>
Date: Thu, 10 Feb 2022 20:02:16 +0000 (+0100)
Subject: blob: clear buf->head when freeing a buffer
X-Git-Url: http://git.openwrt.org/?p=project%2Flibubox.git;a=commitdiff_plain;h=f2d6752901f2f2d8612fb43e10061570c9198af1

blob: clear buf->head when freeing a buffer

Prevents accidental silent use-after-free bugs

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---

diff --git a/blob.c b/blob.c
index bd66d78..65adb13 100644
--- a/blob.c
+++ b/blob.c
@@ -105,6 +105,7 @@ blob_buf_free(struct blob_buf *buf)
 {
 	free(buf->buf);
 	buf->buf = NULL;
+	buf->head = NULL;
 	buf->buflen = 0;
 }