On Thu, Aug 07, 2025 at 03:34:18PM +0530, Ling Xu wrote:
> Fastrpc driver creates maps for user allocated fd buffers. Before
> creating a new map, the map list is checked for any already existing
> maps using map fd. Checking with just map fd is not sufficient as the
> user can pass offsetted buffer with less size when the map is created
> and then a larger size the next time which could result in memory
> issues. Check for dma_buf object also when looking up for the map.
>
> Fixes: c68cfb718c8f ("misc: fastrpc: Add support for context Invoke method")
> Cc: sta...@kernel.org
> Co-developed-by: Ekansh Gupta <ekansh.gu...@oss.qualcomm.com>
> Signed-off-by: Ekansh Gupta <ekansh.gu...@oss.qualcomm.com>
> Signed-off-by: Ling Xu <quic_l...@quicinc.com>
> ---
> drivers/misc/fastrpc.c | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
>
Reviewed-by: Dmitry Baryshkov <dmitry.barysh...@oss.qualcomm.com>
--
With best wishes
Dmitry
