linux-kernel - [PATCH AUTOSEL 5.7 334/388] bpf: Fix an error code in check_btf

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Date:   Wed, 17 Jun 2020 21:07:11 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Dan Carpenter <dan.carpenter@...cle.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Song Liu <songliubraving@...com>,
        Sasha Levin <sashal@...nel.org>, netdev@...r.kernel.org,
        bpf@...r.kernel.org
Subject: [PATCH AUTOSEL 5.7 334/388] bpf: Fix an error code in check_btf_func()

From: Dan Carpenter <dan.carpenter@...cle.com>

[ Upstream commit e7ed83d6fa1a00d0f2ad0327e73d3ea9e7ea8de1 ]

This code returns success if the "info_aux" allocation fails but it
should return -ENOMEM.

Fixes: 8c1b6e69dcc1 ("bpf: Compare BTF types of functions arguments with actual types")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Daniel Borkmann <daniel@...earbox.net>
Acked-by: Song Liu <songliubraving@...com>
Link: https://lore.kernel.org/bpf/20200604085436.GA943001@mwanda
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 kernel/bpf/verifier.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index efe14cf24bc6..739d9ba3ba6b 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -7366,7 +7366,7 @@ static int check_btf_func(struct bpf_verifier_env *env,
 	const struct btf *btf;
 	void __user *urecord;
 	u32 prev_offset = 0;
-	int ret = 0;
+	int ret = -ENOMEM;
 
 	nfuncs = attr->func_info_cnt;
 	if (!nfuncs)
-- 
2.25.1