[lvc-project] [PATCH 5.10/5.15] clk: imx: Add check for kcalloc

[Alexandra Diupina]

From: Jiasheng Jiang <jiasheng at iscas.ac.cn>

commit ed713e2bc093239ccd380c2ce8ae9e4162f5c037 upstream.

As the potential failure of the kcalloc(),
it should be better to check it in order to
avoid the dereference of the NULL pointer.

Fixes: 379c9a24cc23 ("clk: imx: Fix reparenting of UARTs not associated with stdout")
Signed-off-by: Jiasheng Jiang <jiasheng at iscas.ac.cn>
Reviewed-by: Abel Vesa <abel.vesa at nxp.com>
Link: https://lore.kernel.org/r/20220310080257.1988412-1-jiasheng@iscas.ac.cn
Signed-off-by: Abel Vesa <abel.vesa at nxp.com>
Signed-off-by: Alexandra Diupina <adiupina at astralinux.ru>
---
Backport fix for CVE-2022-3114
 drivers/clk/imx/clk.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/clk/imx/clk.c b/drivers/clk/imx/clk.c
index d4cf0c7045ab2..be0493e5b494e 100644
--- a/drivers/clk/imx/clk.c
+++ b/drivers/clk/imx/clk.c
@@ -173,6 +173,8 @@ void imx_register_uart_clocks(unsigned int clk_count)
 		int i;
 
 		imx_uart_clocks = kcalloc(clk_count, sizeof(struct clk *), GFP_KERNEL);
+		if (!imx_uart_clocks)
+			return;
 
 		if (!of_stdout)
 			return;
-- 
2.47.3