From: Karel Zak <kzak@redhat.com>
Date: Mon, 11 Jul 2022 10:49:21 +0000 (+0200)
Subject: libfdisk: (gpt) fix PMBR read overflow
X-Git-Tag: v2.39-rc1~580
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7e07aa75d5e69369cc73c403159514df497eda5b;p=thirdparty%2Futil-linux.git

libfdisk: (gpt) fix PMBR read overflow

Signed-off-by: Karel Zak <kzak@redhat.com>
---

diff --git a/libfdisk/src/gpt.c b/libfdisk/src/gpt.c
index c132739b2b..1fed8641f4 100644
--- a/libfdisk/src/gpt.c
+++ b/libfdisk/src/gpt.c
@@ -2129,7 +2129,7 @@ static int gpt_write_pmbr(struct fdisk_context *cxt)
 		goto do_write;
 
 	rc = gpt_read(cxt, GPT_PMBR_LBA * cxt->sector_size,
-		      current, cxt->sector_size);
+		      current, sizeof(*current));
 	if (!rc)
 		rc = memcmp(pmbr, current, sizeof(*current));