Module: Mesa Branch: main Commit: b74898ef699486d0513fcd3af2587a831df99dff URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=b74898ef699486d0513fcd3af2587a831df99dff
Author: Maksim Sisov <[email protected]> Date: Tue May 18 08:23:56 2021 +0300 iris: export GEM handle with RDWR access rights There is a regression that made it impossible to export gem handles with write access. That is, a client may export gem handles of each buffer plane, then export dmabuf fds using these handles, and mmap these dmabuf in a different process (this is what Chromium does). After https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4861, it became impossible as mmap resulted in EACCESS error as slightly different approach was taken for exporting these gem handles. This CL fixes exporting gem handles (which are exported from dmabuf fds) by adding the DRM_RDWR flag. Cc: mesa-stable Fixes #3119 Reviewed-by: Lionel Landwerlin <[email protected]> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10851> --- src/gallium/drivers/iris/iris_bufmgr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/gallium/drivers/iris/iris_bufmgr.c b/src/gallium/drivers/iris/iris_bufmgr.c index 99dd2e79135..1c731a44989 100644 --- a/src/gallium/drivers/iris/iris_bufmgr.c +++ b/src/gallium/drivers/iris/iris_bufmgr.c @@ -1572,7 +1572,7 @@ iris_bo_export_dmabuf(struct iris_bo *bo, int *prime_fd) iris_bo_make_external(bo); if (drmPrimeHandleToFD(bufmgr->fd, bo->gem_handle, - DRM_CLOEXEC, prime_fd) != 0) + DRM_CLOEXEC | DRM_RDWR, prime_fd) != 0) return -errno; return 0; _______________________________________________ mesa-commit mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/mesa-commit
