You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
48 lines
1.4 KiB
48 lines
1.4 KiB
From 4339aa85279d268a671a656f142445559be771b7 Mon Sep 17 00:00:00 2001
|
|
From: Lennart Poettering <lennart@poettering.net>
|
|
Date: Wed, 14 Nov 2018 18:39:37 +0100
|
|
Subject: [PATCH] format-table: make sure we never call memcmp() with NULL
|
|
parameters
|
|
|
|
(cherry picked from commit 88db94fa57c9a5b1a0b926c49d3624fc84c88090)
|
|
|
|
Related: #1689832
|
|
---
|
|
src/basic/format-table.c | 2 +-
|
|
src/basic/util.h | 9 +++++++++
|
|
2 files changed, 10 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/src/basic/format-table.c b/src/basic/format-table.c
|
|
index 0a1777e9a2..5517adad82 100644
|
|
--- a/src/basic/format-table.c
|
|
+++ b/src/basic/format-table.c
|
|
@@ -291,7 +291,7 @@ static bool table_data_matches(
|
|
if (k != l)
|
|
return false;
|
|
|
|
- return memcmp(data, d->data, l) == 0;
|
|
+ return memcmp_safe(data, d->data, l) == 0;
|
|
}
|
|
|
|
static TableData *table_data_new(
|
|
diff --git a/src/basic/util.h b/src/basic/util.h
|
|
index 27b5a09782..b68ef25ed8 100644
|
|
--- a/src/basic/util.h
|
|
+++ b/src/basic/util.h
|
|
@@ -123,6 +123,15 @@ static inline void memcpy_safe(void *dst, const void *src, size_t n) {
|
|
memcpy(dst, src, n);
|
|
}
|
|
|
|
+/* Normal memcmp requires s1 and s2 to be nonnull. We do nothing if n is 0. */
|
|
+static inline int memcmp_safe(const void *s1, const void *s2, size_t n) {
|
|
+ if (n == 0)
|
|
+ return 0;
|
|
+ assert(s1);
|
|
+ assert(s2);
|
|
+ return memcmp(s1, s2, n);
|
|
+}
|
|
+
|
|
int on_ac_power(void);
|
|
|
|
#define memzero(x,l) (memset((x), 0, (l)))
|