42 lines
1.7 KiB
Diff
42 lines
1.7 KiB
Diff
From 618e38b8b775f45c0a18975ae33753b92c954092 Mon Sep 17 00:00:00 2001
|
|
From: Gerd Hoffmann <kraxel@redhat.com>
|
|
Date: Tue, 24 Jan 2023 10:28:25 +0100
|
|
Subject: [PATCH] bootctl: tweak DOS header magic check
|
|
|
|
Read the magic first, try reading the full DOS exe header only in case
|
|
the magic check succeeds.
|
|
|
|
This avoids throwing an header read error on small dummy files as used
|
|
by test-kernel-install.
|
|
|
|
(cherry picked from commit 78088b8f43717a43661cd2c1627a9860904c4794)
|
|
|
|
Related: RHEL-16354
|
|
---
|
|
src/boot/bootctl-uki.c | 9 +++++++--
|
|
1 file changed, 7 insertions(+), 2 deletions(-)
|
|
|
|
diff --git a/src/boot/bootctl-uki.c b/src/boot/bootctl-uki.c
|
|
index fd249c43fb..d90a850b1c 100644
|
|
--- a/src/boot/bootctl-uki.c
|
|
+++ b/src/boot/bootctl-uki.c
|
|
@@ -30,11 +30,16 @@ static int pe_sections(FILE *uki, struct PeSectionHeader **ret, size_t *ret_n) {
|
|
assert(ret_n);
|
|
|
|
items = fread(&dos, 1, sizeof(dos), uki);
|
|
- if (items != sizeof(dos))
|
|
- return log_error_errno(SYNTHETIC_ERRNO(EIO), "DOS header read error");
|
|
+ if (items < sizeof(dos.Magic))
|
|
+ return log_error_errno(SYNTHETIC_ERRNO(EIO), "File is smaller than DOS magic (got %"PRIu64" of %zu bytes)",
|
|
+ items, sizeof(dos.Magic));
|
|
if (memcmp(dos.Magic, dos_file_magic, sizeof(dos_file_magic)) != 0)
|
|
goto no_sections;
|
|
|
|
+ if (items != sizeof(dos))
|
|
+ return log_error_errno(SYNTHETIC_ERRNO(EIO), "File is smaller than DOS header (got %"PRIu64" of %zu bytes)",
|
|
+ items, sizeof(dos));
|
|
+
|
|
if (fseek(uki, le32toh(dos.ExeHeader), SEEK_SET) < 0)
|
|
return log_error_errno(errno, "seek to PE header");
|
|
|