linux-kernel - [PATCH] libbpf:fix overrun in attribute iteration

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 30 Sep 2022 17:07:08 +0800
From:   Xin Liu <liuxin350@...wei.com>
To:     <quentin@...valent.com>
CC:     <andrii@...nel.org>, <ast@...nel.org>, <bpf@...r.kernel.org>,
        <daniel@...earbox.net>, <haoluo@...gle.com>,
        <john.fastabend@...il.com>, <jolsa@...nel.org>,
        <kongweibin2@...wei.com>, <kpsingh@...nel.org>,
        <linux-kernel@...r.kernel.org>, <liuxin350@...wei.com>,
        <martin.lau@...ux.dev>, <sdf@...gle.com>, <song@...nel.org>,
        <wuchangye@...wei.com>, <xiesongyang@...wei.com>,
        <yanan@...wei.com>, <yhs@...com>, <zhudi2@...wei.com>
Subject: [PATCH] libbpf:fix overrun in attribute iteration

I accidentally found that a change in commit 1045b03e07d8 ("netlink: fix
overrun in attribute iteration") was not synchronized to the function
`nla_ok` in tools/lib/bpf/nlattr.c, I think it is necessary to modify,
this patch will do it.

Signed-off-by: Xin Liu <liuxin350@...wei.com>
---
 tools/lib/bpf/nlattr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/lib/bpf/nlattr.c b/tools/lib/bpf/nlattr.c
index f57e77a6e40f..3900d052ed19 100644
--- a/tools/lib/bpf/nlattr.c
+++ b/tools/lib/bpf/nlattr.c
@@ -32,7 +32,7 @@ static struct nlattr *nla_next(const struct nlattr *nla, int *remaining)
 
 static int nla_ok(const struct nlattr *nla, int remaining)
 {
-	return remaining >= sizeof(*nla) &&
+	return remaining >= (int)sizeof(*nla) &&
 	       nla->nla_len >= sizeof(*nla) &&
 	       nla->nla_len <= remaining;
 }
-- 
2.33.0