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Date: Sun, 9 Oct 2022 18:14:47 -0400 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Xin Liu <liuxin350@...wei.com>, Andrii Nakryiko <andrii@...nel.org>, Sasha Levin <sashal@...nel.org>, ast@...nel.org, daniel@...earbox.net, bpf@...r.kernel.org Subject: [PATCH AUTOSEL 5.19 69/73] libbpf: Fix overrun in netlink attribute iteration From: Xin Liu <liuxin350@...wei.com> [ Upstream commit 51e05a8cf8eb34da7473823b7f236a77adfef0b4 ] 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> Signed-off-by: Andrii Nakryiko <andrii@...nel.org> Link: https://lore.kernel.org/bpf/20220930090708.62394-1-liuxin350@huawei.com Signed-off-by: Sasha Levin <sashal@...nel.org> --- 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; } -- 2.35.1
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