clk: zynq: Prevent null pointer dereference caused by kmalloc failure

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[ Upstream commit 7938e9ce39 ]

The kmalloc() in zynq_clk_setup() will return null if the
physical memory has run out. As a result, if we use snprintf()
to write data to the null address, the null pointer dereference
bug will happen.

This patch uses a stack variable to replace the kmalloc().

Fixes: 0ee52b157b ("clk: zynq: Add clock controller driver")
Suggested-by: Michal Simek <michal.simek@amd.com>
Suggested-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Duoming Zhou <duoming@zju.edu.cn>
Link: https://lore.kernel.org/r/20240301084437.16084-1-duoming@zju.edu.cn
Acked-by: Michal Simek <michal.simek@amd.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

This commit is contained in:

Duoming Zhou 2024-03-01 16:44:37 +08:00 • committed by Sasha Levin

parent 0efb9ef6fb

commit 01511ac7be

1 changed files with 3 additions and 5 deletions

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drivers/clk/zynq/clkc.c

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