| Submitter | Andrey Konovalov |
|---|---|
| Date | May 6, 2019, 4:31 p.m. |
| Message ID | <cdf0b98edefa9227db4a3d1fb6e3c7bc5a6a6215.1557160186.git.andreyknvl@google.com> |
| Download | mbox | patch |
| Permalink | /patch/56056/ |
| State | Not Applicable |
| Headers | show |
Comments
Patch
diff --git a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c index 0b9ab1d0dd45..8e7b52ab6c63 100644 --- a/drivers/tee/tee_shm.c +++ b/drivers/tee/tee_shm.c @@ -263,6 +263,7 @@ struct tee_shm *tee_shm_register(struct tee_context *ctx, unsigned long addr, shm->teedev = teedev; shm->ctx = ctx; shm->id = -1; + addr = untagged_addr(addr); start = rounddown(addr, PAGE_SIZE); shm->offset = addr - start; shm->size = length;
This patch is a part of a series that extends arm64 kernel ABI to allow to pass tagged user pointers (with the top byte set to something else other than 0x00) as syscall arguments. tee_shm_register()->optee_shm_unregister()->check_mem_type() uses provided user pointers for vma lookups (via __check_mem_type()), which can only by done with untagged pointers. Untag user pointers in this function. Signed-off-by: Andrey Konovalov <andreyknvl@google.com> --- drivers/tee/tee_shm.c | 1 + 1 file changed, 1 insertion(+)