nftables/0014-src-add-xzalloc_array-and-use-it-to-allocate-the-exp.patch

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From 6509f63cb68ea2dd737f9b52c146803402efcd7a Mon Sep 17 00:00:00 2001
From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Mon, 14 Jun 2021 14:47:47 +0200
Subject: [PATCH] src: add xzalloc_array() and use it to allocate the
expression hashtable
Otherwise, assertion to ensure that no colission occur is hit due to
uninitialized hashtable memory area:
nft: netlink_delinearize.c:1741: expr_handler_init: Assertion `expr_handle_ht[hash] == NULL' failed.
Fixes: c4058f96c6a5 ("netlink_delinearize: Fix suspicious calloc() call")
Acked-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
(cherry picked from commit b0e7b294224030abc534c396fffcab9fbce12b11)
Signed-off-by: Phil Sutter <psutter@redhat.com>
---
include/utils.h | 1 +
src/netlink_delinearize.c | 2 +-
src/utils.c | 10 ++++++++++
3 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/include/utils.h b/include/utils.h
index f45f25132d18d..ffbe2cbb75be5 100644
--- a/include/utils.h
+++ b/include/utils.h
@@ -133,6 +133,7 @@ extern void *xmalloc(size_t size);
extern void *xmalloc_array(size_t nmemb, size_t size);
extern void *xrealloc(void *ptr, size_t size);
extern void *xzalloc(size_t size);
+extern void *xzalloc_array(size_t nmemb, size_t size);
extern char *xstrdup(const char *s);
extern void xstrunescape(const char *in, char *out);
diff --git a/src/netlink_delinearize.c b/src/netlink_delinearize.c
index 152b3e6cf8c65..7665d6f29c602 100644
--- a/src/netlink_delinearize.c
+++ b/src/netlink_delinearize.c
@@ -1732,7 +1732,7 @@ void expr_handler_init(void)
unsigned int i;
uint32_t hash;
- expr_handle_ht = xmalloc_array(NFT_EXPR_HSIZE,
+ expr_handle_ht = xzalloc_array(NFT_EXPR_HSIZE,
sizeof(expr_handle_ht[0]));
for (i = 0; i < array_size(netlink_parsers); i++) {
diff --git a/src/utils.c b/src/utils.c
index 47f5b791547b1..925841c571f5d 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -50,6 +50,16 @@ void *xmalloc_array(size_t nmemb, size_t size)
return xmalloc(nmemb * size);
}
+void *xzalloc_array(size_t nmemb, size_t size)
+{
+ void *ptr;
+
+ ptr = xmalloc_array(nmemb, size);
+ memset(ptr, 0, nmemb * size);
+
+ return ptr;
+}
+
void *xrealloc(void *ptr, size_t size)
{
ptr = realloc(ptr, size);
--
2.31.1