commit 18549bf4b21c739a9def39f27dcac53e27286ab5 upstream.

Pointer to the allocated pages (struct page *page) has already progressed towards the end of allocation. It is incorrect to perform __free_pages(page, order) using this pointer as we would free any arbitrary pages. Fix this by stop modifying the page pointer.

Fixes: ec185dd3ab25 ("optee: Fix memory leak when failing to register shm pages") Cc: stable@vger.kernel.org Reported-by: Patrik Lantz patrik.lantz@axis.com Signed-off-by: Sumit Garg sumit.garg@linaro.org Reviewed-by: Tyler Hicks tyhicks@linux.microsoft.com Signed-off-by: Jens Wiklander jens.wiklander@linaro.org [SG: Backport for stable kernels] Signed-off-by: Sumit Garg sumit.garg@linaro.org --- drivers/tee/optee/shm_pool.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/tee/optee/shm_pool.c b/drivers/tee/optee/shm_pool.c index d167039af519..1aa843f2ecc7 100644 --- a/drivers/tee/optee/shm_pool.c +++ b/drivers/tee/optee/shm_pool.c @@ -41,10 +41,8 @@ static int pool_op_alloc(struct tee_shm_pool_mgr *poolm, goto err; }

- for (i = 0; i < nr_pages; i++) { - pages[i] = page; - page++; - } + for (i = 0; i < nr_pages; i++) + pages[i] = page + i;

shm->flags |= TEE_SHM_REGISTER; rc = optee_shm_register(shm->ctx, shm, pages, nr_pages,