netdev - [PATCH] tools/bpftool: silence a static check warning

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: Windows password security audit tool. GUI, reports in PDF.

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

Date:   Mon, 15 Jan 2018 11:15:47 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>
Cc:     netdev@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH] tools/bpftool: silence a static check warning

There is a static checker warning that proglen has an upper bound but no
lower bound.  The allocation will just fail harmlessly so it's not a big
deal.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/tools/bpf/bpf_jit_disasm.c b/tools/bpf/bpf_jit_disasm.c
index 30044bc4f389..2d7bb5dc0b8c 100644
--- a/tools/bpf/bpf_jit_disasm.c
+++ b/tools/bpf/bpf_jit_disasm.c
@@ -205,7 +205,7 @@ static uint8_t *get_last_jit_image(char *haystack, size_t hlen,
 		regfree(&regex);
 		return NULL;
 	}
-	if (proglen > 1000000) {
+	if (proglen < 0 || proglen > 1000000) {
 		printf("proglen of %d too big, stopping\n", proglen);
 		return NULL;
 	}