systemd/SOURCES/0695-vmm-Modernize-get_smbios_table.patch

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2024-04-30 11:42:21 +00:00
From 47fd30b95f506beaef5640ad61b40b180c7ac47b Mon Sep 17 00:00:00 2001
From: Daan De Meyer <daan.j.demeyer@gmail.com>
Date: Wed, 22 Feb 2023 17:04:58 +0100
Subject: [PATCH] vmm: Modernize get_smbios_table()
(cherry picked from commit c8e5d82c97a1478b15d2f97ffebd9591e81663ba)
Related: RHEL-16952
---
src/boot/efi/vmm.c | 18 +++++++-----------
1 file changed, 7 insertions(+), 11 deletions(-)
diff --git a/src/boot/efi/vmm.c b/src/boot/efi/vmm.c
index 19b66a3974..f9a59dca0a 100644
--- a/src/boot/efi/vmm.c
+++ b/src/boot/efi/vmm.c
@@ -258,22 +258,18 @@ static const SmbiosHeader *get_smbios_table(uint8_t type, uint64_t *ret_size_lef
/* Skip over string table. */
for (;;) {
- while (size > 0 && *p != '\0') {
- p++;
- size--;
- }
- if (size == 0)
+ const uint8_t *e = memchr(p, 0, size);
+ if (!e)
return NULL;
- p++;
- size--;
- /* Double NUL terminates string table. */
- if (*p == '\0') {
- if (size == 0)
- return NULL;
+ if (e == p) {/* Double NUL byte means we've reached the end of the string table. */
p++;
+ size--;
break;
}
+
+ size -= e + 1 - p;
+ p = e + 1;
}
}