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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org,
	stable@vger.kernel.org
Cc: Markus Elfring <elfring@users.sourceforge.net>,
	Thierry Reding <treding@nvidia.com>,
	Sasha Levin <sashal@kernel.org>,
	thierry.reding@gmail.com,
	jonathanh@nvidia.com,
	keescook@chromium.org,
	mperttunen@nvidia.com,
	justinstitt@google.com,
	linux-tegra@vger.kernel.org
Subject: [PATCH AUTOSEL 6.8 49/98] firmware: tegra: bpmp: Return directly after a failed kzalloc() in get_filename()
Date: Fri, 29 Mar 2024 08:37:20 -0400
Message-ID: <20240329123919.3087149-49-sashal@kernel.org>
In-Reply-To: <20240329123919.3087149-1-sashal@kernel.org>
References: <20240329123919.3087149-1-sashal@kernel.org>
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From: Markus Elfring <elfring@users.sourceforge.net>

[ Upstream commit 1315848f1f8a0100cb6f8a7187bc320c5d98947f ]

The kfree() function was called in one case by
the get_filename() function during error handling
even if the passed variable contained a null pointer.
This issue was detected by using the Coccinelle software.

Thus return directly after a call of the function “kzalloc” failed
at the beginning.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/firmware/tegra/bpmp-debugfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/firmware/tegra/bpmp-debugfs.c b/drivers/firmware/tegra/bpmp-debugfs.c
index bbcdd9fed3fb6..4221fed70ad48 100644
--- a/drivers/firmware/tegra/bpmp-debugfs.c
+++ b/drivers/firmware/tegra/bpmp-debugfs.c
@@ -77,7 +77,7 @@ static const char *get_filename(struct tegra_bpmp *bpmp,
 
 	root_path_buf = kzalloc(root_path_buf_len, GFP_KERNEL);
 	if (!root_path_buf)
-		goto out;
+		return NULL;
 
 	root_path = dentry_path(bpmp->debugfs_mirror, root_path_buf,
 				root_path_buf_len);
-- 
2.43.0