Commit c7908a37 authored Sep 24, 2014 by Xiubo Li Committed by Mark Brown Sep 24, 2014

spi: Fix possible ZERO_SIZE_PTR pointer dereferencing error.



Since we cannot make sure the 'n' will always be none zero here, and
then if either equal to zero, the kzalloc() will return ZERO_SIZE_PTR,
which equals to ((void *)16).

So this patch fix this with just doing the zero check before calling
kzalloc().

Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

parent 38ec10f6

drivers/spi/spi.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -552,6 +552,9 @@ int spi_register_board_info(struct spi_board_info const *info, unsigned n)
		struct boardinfo *bi;
		int i;

		if (!n)
		return -EINVAL;

		bi = kzalloc(n * sizeof(*bi), GFP_KERNEL);
		if (!bi)
		return -ENOMEM;