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 c132739b2bfa43a9aec1e1d888b5e8d9efcd4b1a..1fed8641f467968513da48b34154f21dc14ec815 100644 (file)
--- 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));