linux-kernel - [PATCH] clk: keystone: sci-clk: check devm_kmalloc

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Message-Id: <20240110134621.17209-1-adiupina@astralinux.ru>
Date: Wed, 10 Jan 2024 16:46:21 +0300
From: Alexandra Diupina <adiupina@...ralinux.ru>
To: Nishanth Menon <nm@...com>
Cc: Alexandra Diupina <adiupina@...ralinux.ru>,
	Tero Kristo <kristo@...nel.org>,
	Santosh Shilimkar <ssantosh@...nel.org>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-clk@...r.kernel.org,
	lvc-project@...uxtesting.org
Subject: [PATCH] clk: keystone: sci-clk: check devm_kmalloc_array() return value

devm_kmalloc_array() may return NULL, so
check return value to avoid null pointer
dereferencing

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 3c13933c6033 ("clk: keystone: sci-clk: add support for dynamically probing clocks")
Signed-off-by: Alexandra Diupina <adiupina@...ralinux.ru>
---
 drivers/clk/keystone/sci-clk.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/clk/keystone/sci-clk.c b/drivers/clk/keystone/sci-clk.c
index 35fe197dd303..a2fa24e4f88a 100644
--- a/drivers/clk/keystone/sci-clk.c
+++ b/drivers/clk/keystone/sci-clk.c
@@ -459,6 +459,9 @@ static int ti_sci_scan_clocks_from_fw(struct sci_clk_provider *provider)
 			tmp_clks = devm_kmalloc_array(dev, max_clks + 64,
 						      sizeof(sci_clk),
 						      GFP_KERNEL);
+			if (!tmp_clks)
+				return -ENOMEM;
+
 			memcpy(tmp_clks, clks, max_clks * sizeof(sci_clk));
 			if (max_clks)
 				devm_kfree(dev, clks);
-- 
2.30.2