[<prev] [next>] [day] [month] [year] [list]
Message-Id: <20200116164300.6705-112-sashal@kernel.org>
Date: Thu, 16 Jan 2020 11:41:27 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Andrii Nakryiko <andriin@...com>,
Daniel Borkmann <daniel@...earbox.net>,
Sasha Levin <sashal@...nel.org>, netdev@...r.kernel.org,
bpf@...r.kernel.org
Subject: [PATCH AUTOSEL 5.4 112/205] libbpf: Fix potential overflow issue
From: Andrii Nakryiko <andriin@...com>
[ Upstream commit 4ee1135615713387b869dfd099ffdf8656be6784 ]
Fix a potential overflow issue found by LGTM analysis, based on Github libbpf
source code.
Fixes: 3d65014146c6 ("bpf: libbpf: Add btf_line_info support to libbpf")
Signed-off-by: Andrii Nakryiko <andriin@...com>
Signed-off-by: Daniel Borkmann <daniel@...earbox.net>
Link: https://lore.kernel.org/bpf/20191107020855.3834758-3-andriin@fb.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
tools/lib/bpf/bpf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index cbb933532981..9d0485959308 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -189,7 +189,7 @@ static void *
alloc_zero_tailing_info(const void *orecord, __u32 cnt,
__u32 actual_rec_size, __u32 expected_rec_size)
{
- __u64 info_len = actual_rec_size * cnt;
+ __u64 info_len = (__u64)actual_rec_size * cnt;
void *info, *nrecord;
int i;
--
2.20.1
Powered by blists - more mailing lists