diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0296-drm-vc4-Return-EFAULT-on-copy_from_user-failure.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0296-drm-vc4-Return-EFAULT-on-copy_from_user-failure.patch | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0296-drm-vc4-Return-EFAULT-on-copy_from_user-failure.patch b/target/linux/brcm2708/patches-4.4/0296-drm-vc4-Return-EFAULT-on-copy_from_user-failure.patch new file mode 100644 index 0000000000..9fc05426e2 --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0296-drm-vc4-Return-EFAULT-on-copy_from_user-failure.patch @@ -0,0 +1,36 @@ +From ca25ba22f36a3e55b94f650e402564d830843edb Mon Sep 17 00:00:00 2001 +From: Dan Carpenter <dan.carpenter@oracle.com> +Date: Tue, 8 Mar 2016 15:09:41 +0300 +Subject: [PATCH 296/381] drm/vc4: Return -EFAULT on copy_from_user() failure + +The copy_from_user() function returns the number of bytes not copied but +we want to return a negative error code. + +Fixes: 463873d57014 ('drm/vc4: Add an API for creating GPU shaders in GEM BOs.') +Cc: stable@vger.kernel.org +Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> +Reviewed-by: Eric Anholt <eric@anholt.net> +Signed-off-by: Eric Anholt <eric@anholt.net> +(cherry picked from commit 585cb132a48190b554aecda2ebc3e2911fcbb665) +--- + drivers/gpu/drm/vc4/vc4_bo.c | 7 ++++--- + 1 file changed, 4 insertions(+), 3 deletions(-) + +--- a/drivers/gpu/drm/vc4/vc4_bo.c ++++ b/drivers/gpu/drm/vc4/vc4_bo.c +@@ -519,11 +519,12 @@ vc4_create_shader_bo_ioctl(struct drm_de + if (IS_ERR(bo)) + return PTR_ERR(bo); + +- ret = copy_from_user(bo->base.vaddr, ++ if (copy_from_user(bo->base.vaddr, + (void __user *)(uintptr_t)args->data, +- args->size); +- if (ret != 0) ++ args->size)) { ++ ret = -EFAULT; + goto fail; ++ } + /* Clear the rest of the memory from allocating from the BO + * cache. + */ |