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[Qemu-devel] [PATCH 1/3] i386: fix regression parsing multiboot initrd m
From: |
Daniel P . Berrangé |
Subject: |
[Qemu-devel] [PATCH 1/3] i386: fix regression parsing multiboot initrd modules |
Date: |
Mon, 14 May 2018 18:19:11 +0100 |
The logic for parsing the multiboot initrd modules was messed up in
commit 950c4e6c94b15cd0d8b63891dddd7a8dbf458e6a
Author: Daniel P. Berrangé <address@hidden>
Date: Mon Apr 16 12:17:43 2018 +0100
opts: don't silently truncate long option values
Causing the length to be undercounter, and the number of modules over
counted. It also passes NULL to get_opt_value() which was not robust
at accepting a NULL value.
Signed-off-by: Daniel P. Berrangé <address@hidden>
---
hw/i386/multiboot.c | 3 +--
util/qemu-option.c | 4 +++-
2 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/hw/i386/multiboot.c b/hw/i386/multiboot.c
index 7a2953e26f..8e26545814 100644
--- a/hw/i386/multiboot.c
+++ b/hw/i386/multiboot.c
@@ -292,8 +292,7 @@ int load_multiboot(FWCfgState *fw_cfg,
cmdline_len += strlen(kernel_cmdline) + 1;
if (initrd_filename) {
const char *r = get_opt_value(initrd_filename, NULL);
- cmdline_len += strlen(r) + 1;
- mbs.mb_mods_avail = 1;
+ cmdline_len += strlen(initrd_filename) + 1;
while (1) {
mbs.mb_mods_avail++;
r = get_opt_value(r, NULL);
diff --git a/util/qemu-option.c b/util/qemu-option.c
index 58d1c23893..8a68bc2314 100644
--- a/util/qemu-option.c
+++ b/util/qemu-option.c
@@ -75,7 +75,9 @@ const char *get_opt_value(const char *p, char **value)
size_t capacity = 0, length;
const char *offset;
- *value = NULL;
+ if (value) {
+ *value = NULL;
+ }
while (1) {
offset = strchr(p, ',');
if (!offset) {
--
2.17.0