linux-kernel - [PATCH AUTOSEL 6.6 27/52] firmware: tegra: bpmp: Return directly after a failed kzalloc() in get

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Date: Fri, 29 Mar 2024 08:28:57 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Markus Elfring <elfring@...rs.sourceforge.net>,
	Thierry Reding <treding@...dia.com>,
	Sasha Levin <sashal@...nel.org>,
	thierry.reding@...il.com,
	jonathanh@...dia.com,
	keescook@...omium.org,
	justinstitt@...gle.com,
	mperttunen@...dia.com,
	linux-tegra@...r.kernel.org
Subject: [PATCH AUTOSEL 6.6 27/52] firmware: tegra: bpmp: Return directly after a failed kzalloc() in get_filename()

From: Markus Elfring <elfring@...rs.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@...rs.sourceforge.net>
Signed-off-by: Thierry Reding <treding@...dia.com>
Signed-off-by: Sasha Levin <sashal@...nel.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 6dfe3d34109ee..b20d04950d99b 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