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spi: Fix possible ZERO_SIZE_PTR pointer dereferencing error.

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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>
This commit is contained in:
Xiubo Li 2014-09-24 14:30:29 +08:00 committed by Mark Brown
parent 38ec10f60d
commit c7908a37ae
1 changed files with 3 additions and 0 deletions
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3
drivers/spi/spi.c
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@ -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;