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msm: vidc: Validate userspace buffer count before using it

Validate the number of buffers count variable before
using it to avoid structure overflow error.

Bug: 28598501

Change-Id: I61582c93e0f26ec6842e437134fb8a42bdbc36ff
CRs-fixed: 563654
Signed-off-by: Pachika, Vikas Reddy <vpachi@codeaurora.org>
This commit is contained in:
Pachika, Vikas Reddy 2013-11-05 12:48:36 +05:30 committed by Yueyao (Nathan) Zhu
parent 37836aa8ad
commit 26eed7f7a2

View file

@ -919,6 +919,12 @@ static u32 vid_dec_set_meta_buffers(struct video_client_ctx *client_ctx,
vcd_meta_buffer->offset = meta_buffers->offset;
vcd_meta_buffer->pmem_fd_iommu = meta_buffers->pmem_fd_iommu;
if (meta_buffers->count > MAX_META_BUFFERS) {
ERR("meta buffers maximum count reached, count = %d",
meta_buffers->count);
return false;
}
if (!vcd_get_ion_status()) {
if (get_pmem_file(vcd_meta_buffer->pmem_fd,
(unsigned long *) (&(vcd_meta_buffer->