media: [PATCH] pci: atomisp_cmd: fix three missing checks on list iterator

The three bugs are here:
	__func__, s3a_buf->s3a_data->exp_id);
	__func__, md_buf->metadata->exp_id);
	__func__, dis_buf->dis_data->exp_id);

The list iterator 's3a_buf/md_buf/dis_buf' will point to a bogus
position containing HEAD if the list is empty or no element is found.
This case must be checked before any use of the iterator, otherwise
it will lead to a invalid memory access.

To fix this bug, add an check. Use a new variable '*_iter' as the
list iterator, while use the old variable '*_buf' as a dedicated
pointer to point to the found element.

Link: https://lore.kernel.org/linux-media/[email protected]
Cc: [email protected]
Fixes: ad85094b293e4 ("Revert "media: staging: atomisp: Remove driver"")
Signed-off-by: Xiaomeng Tong <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>

0 files changed, 0 insertions, 0 deletions