linux-kernel - [PATCH 5.4 040/108] bpftool: Check malloc return value in mount_bpffs_for

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Message-Id: <20210726153832.976453423@linuxfoundation.org>
Date:   Mon, 26 Jul 2021 17:38:41 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Tobias Klauser <tklauser@...tanz.ch>,
        Daniel Borkmann <daniel@...earbox.net>,
        Quentin Monnet <quentin@...valent.com>,
        Roman Gushchin <guro@...com>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 040/108] bpftool: Check malloc return value in mount_bpffs_for_pin

From: Tobias Klauser <tklauser@...tanz.ch>

[ Upstream commit d444b06e40855219ef38b5e9286db16d435f06dc ]

Fix and add a missing NULL check for the prior malloc() call.

Fixes: 49a086c201a9 ("bpftool: implement prog load command")
Signed-off-by: Tobias Klauser <tklauser@...tanz.ch>
Signed-off-by: Daniel Borkmann <daniel@...earbox.net>
Reviewed-by: Quentin Monnet <quentin@...valent.com>
Acked-by: Roman Gushchin <guro@...com>
Link: https://lore.kernel.org/bpf/20210715110609.29364-1-tklauser@distanz.ch
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 tools/bpf/bpftool/common.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/bpf/bpftool/common.c b/tools/bpf/bpftool/common.c
index 88264abaa738..a209f53901b8 100644
--- a/tools/bpf/bpftool/common.c
+++ b/tools/bpf/bpftool/common.c
@@ -171,6 +171,11 @@ int mount_bpffs_for_pin(const char *name)
 	int err = 0;
 
 	file = malloc(strlen(name) + 1);
+	if (!file) {
+		p_err("mem alloc failed");
+		return -1;
+	}
+
 	strcpy(file, name);
 	dir = dirname(file);
 
-- 
2.30.2