From patchwork Wed Jan 23 21:39:29 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [3.5.y.z, extended, stable] Patch "drm/radeon: fix NULL pointer dereference in UMS mode" has been added to staging queue From: Herton Ronaldo Krzesinski X-Patchwork-Id: 215042 Message-Id: <1358977169-23810-1-git-send-email-herton.krzesinski@canonical.com> To: Ilija Hadzic Cc: Alex Deucher , kernel-team@lists.ubuntu.com Date: Wed, 23 Jan 2013 19:39:29 -0200 This is a note to let you know that I have just added a patch titled drm/radeon: fix NULL pointer dereference in UMS mode to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.5.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Herton ------ >From e42c17ebfbda3a68309ad22b73777b09978d4b99 Mon Sep 17 00:00:00 2001 From: Ilija Hadzic Date: Mon, 7 Jan 2013 18:21:57 -0500 Subject: [PATCH] drm/radeon: fix NULL pointer dereference in UMS mode commit ff4bd0827764e10a428a9d39e6814c5478863f94 upstream. In UMS mode parser->rdev is NULL, so dereferencing will cause an oops. Signed-off-by: Ilija Hadzic Signed-off-by: Alex Deucher Signed-off-by: Herton Ronaldo Krzesinski --- drivers/gpu/drm/radeon/radeon_cs.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) -- 1.7.9.5 diff --git a/drivers/gpu/drm/radeon/radeon_cs.c b/drivers/gpu/drm/radeon/radeon_cs.c index c84eb1a..66d81ae 100644 --- a/drivers/gpu/drm/radeon/radeon_cs.c +++ b/drivers/gpu/drm/radeon/radeon_cs.c @@ -274,7 +274,7 @@ int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data) p->chunks[p->chunk_ib_idx].length_dw); return -EINVAL; } - if ((p->rdev->flags & RADEON_IS_AGP)) { + if (p->rdev && (p->rdev->flags & RADEON_IS_AGP)) { p->chunks[p->chunk_ib_idx].kpage[0] = kmalloc(PAGE_SIZE, GFP_KERNEL); p->chunks[p->chunk_ib_idx].kpage[1] = kmalloc(PAGE_SIZE, GFP_KERNEL); if (p->chunks[p->chunk_ib_idx].kpage[0] == NULL || @@ -613,7 +613,8 @@ static int radeon_cs_update_pages(struct radeon_cs_parser *p, int pg_idx) struct radeon_cs_chunk *ibc = &p->chunks[p->chunk_ib_idx]; int i; int size = PAGE_SIZE; - bool copy1 = (p->rdev->flags & RADEON_IS_AGP) ? false : true; + bool copy1 = (p->rdev && (p->rdev->flags & RADEON_IS_AGP)) ? + false : true; for (i = ibc->last_copied_page + 1; i < pg_idx; i++) { if (DRM_COPY_FROM_USER(p->ib.ptr + (i * (PAGE_SIZE/4)),