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media: [PATCH] pci: atomisp_cmd: fix three missing checks on list ite…
…rator commit 09b204e upstream. 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/20220414041415.3342-1-xiam0nd.tong@gmail.com Cc: stable@vger.kernel.org Fixes: ad85094 ("Revert "media: staging: atomisp: Remove driver"") Signed-off-by: Xiaomeng Tong <xiam0nd.tong@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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