drm/radeon/kms: check AA resolve registers on r300
 

From: Marek Olšák <maraeo@gmail.com>

commit fff1ce4dc6113b6fdc4e3a815ca5fd229408f8ef upstream.

This is an important security fix because we allowed arbitrary values
to be passed to AARESOLVE_OFFSET. This also puts the right buffer address
in the register.

Signed-off-by: Marek Olšák <maraeo@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
[dannf: Backported to linux-2.6.32.y-drm33.z]
---
drivers/gpu/drm/radeon/r100.c | 24 ++++++++++++++++++++++++
drivers/gpu/drm/radeon/r100_track.h | 3 +++
drivers/gpu/drm/radeon/r300.c | 21 +++++++++++++++++++++
drivers/gpu/drm/radeon/r300_reg.h | 2 ++
drivers/gpu/drm/radeon/reg_srcs/r300 | 3 ---
drivers/gpu/drm/radeon/reg_srcs/r420 | 3 ---
drivers/gpu/drm/radeon/reg_srcs/rs600 | 3 ---
drivers/gpu/drm/radeon/reg_srcs/rv515 | 3 ---
8 files changed, 50 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index 3ecd236..2cfb39f 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -2934,6 +2934,27 @@ int r100_cs_track_check(struct radeon_device *rdev, struct r100_cs_track *track)
return -EINVAL;
}
}
+
+ if (track->aa_dirty && track->aaresolve) {
+ if (track->aa.robj == NULL) {
+ DRM_ERROR("[drm] No buffer for AA resolve buffer %d !
", i);
+ return -EINVAL;
+ }
+ /* I believe the format comes from colorbuffer0. */
+ size = track->aa.pitch * track->cb[0].cpp * track->maxy;
+ size += track->aa.offset;
+ if (size > radeon_bo_size(track->aa.robj)) {
+ DRM_ERROR("[drm] Buffer too small for AA resolve buffer %d "
+ "(need %lu have %lu) !
", i, size,
+ radeon_bo_size(track->aa.robj));
+ DRM_ERROR("[drm] AA resolve buffer %d (%u %u %u %u)
",
+ i, track->aa.pitch, track->cb[0].cpp,
+ track->aa.offset, track->maxy);
+ return -EINVAL;
+ }
+ }
+ track->aa_dirty = false;
+
prim_walk = (track->vap_vf_cntl >> 4) & 0x3;
nverts = (track->vap_vf_cntl >> 16) & 0xFFFF;
switch (prim_walk) {
@@ -2995,6 +3016,7 @@ int r100_cs_track_check(struct radeon_device *rdev, struct r100_cs_track *track)
void r100_cs_track_clear(struct radeon_device *rdev, struct r100_cs_track *track)
{
unsigned i, face;
+ track->aa_dirty = true;

if (rdev->family < CHIP_R300) {
track->num_cb = 1;
@@ -3009,6 +3031,8 @@ void r100_cs_track_clear(struct radeon_device *rdev, struct r100_cs_track *track
track->num_texture = 16;
track->maxy = 4096;
track->separate_cube = 0;
+ track->aaresolve = true;
+ track->aa.robj = NULL;
}

for (i = 0; i < track->num_cb; i++) {
diff --git a/drivers/gpu/drm/radeon/r100_track.h b/drivers/gpu/drm/radeon/r100_track.h
index b27a699..a2fada0 100644
--- a/drivers/gpu/drm/radeon/r100_track.h
+++ b/drivers/gpu/drm/radeon/r100_track.h
@@ -71,11 +71,14 @@ struct r100_cs_track {
struct r100_cs_track_array arrays[11];
struct r100_cs_track_cb cb[R300_MAX_CB];
struct r100_cs_track_cb zb;
+ struct r100_cs_track_cb aa;
struct r100_cs_track_texture textures[R300_TRACK_MAX_TEXTURE];
bool z_enabled;
bool separate_cube;
bool fastfill;
bool blend_read_enable;
+ bool aa_dirty;
+ bool aaresolve;
};

int r100_cs_track_check(struct radeon_device *rdev, struct r100_cs_track *track);
diff --git a/drivers/gpu/drm/radeon/r300.c b/drivers/gpu/drm/radeon/r300.c
index 7e9868d..5b26131 100644
--- a/drivers/gpu/drm/radeon/r300.c
+++ b/drivers/gpu/drm/radeon/r300.c
@@ -1044,6 +1044,27 @@ static int r300_packet0_check(struct radeon_cs_parser *p,
/* RB3D_BLENDCNTL */
track->blend_read_enable = !!(idx_value & (1 << 2));
break;
+ case R300_RB3D_AARESOLVE_OFFSET:
+ r = r100_cs_packet_next_reloc(p, &reloc);
+ if (r) {
+ DRM_ERROR("No reloc for ib[%d]=0x%04X
",
+ idx, reg);
+ r100_cs_dump_packet(p, pkt);
+ return r;
+ }
+ track->aa.robj = reloc->robj;
+ track->aa.offset = idx_value;
+ track->aa_dirty = true;
+ ib[idx] = idx_value + ((u32)reloc->lobj.gpu_offset);
+ break;
+ case R300_RB3D_AARESOLVE_PITCH:
+ track->aa.pitch = idx_value & 0x3FFE;
+ track->aa_dirty = true;
+ break;
+ case R300_RB3D_AARESOLVE_CTL:
+ track->aaresolve = idx_value & 0x1;
+ track->aa_dirty = true;
+ break;
case 0x4be8:
/* valid register only on RV530 */
if (p->rdev->family == CHIP_RV530)
diff --git a/drivers/gpu/drm/radeon/r300_reg.h b/drivers/gpu/drm/radeon/r300_reg.h
index 1735a2b..fb21053 100644
--- a/drivers/gpu/drm/radeon/r300_reg.h
+++ b/drivers/gpu/drm/radeon/r300_reg.h
@@ -1369,6 +1369,8 @@
#define R300_RB3D_COLORPITCH2 0x4E40 /* GUESS */
#define R300_RB3D_COLORPITCH3 0x4E44 /* GUESS */

+#define R300_RB3D_AARESOLVE_OFFSET 0x4E80
+#define R300_RB3D_AARESOLVE_PITCH 0x4E84
#define R300_RB3D_AARESOLVE_CTL 0x4E88
/* gap */

diff --git a/drivers/gpu/drm/radeon/reg_srcs/r300 b/drivers/gpu/drm/radeon/reg_srcs/r300
index 19c4663..e4c220f 100644
--- a/drivers/gpu/drm/radeon/reg_srcs/r300
+++ b/drivers/gpu/drm/radeon/reg_srcs/r300
@@ -705,9 +705,6 @@ r300 0x4f60
0x4E74 RB3D_CMASK_WRINDEX
0x4E78 RB3D_CMASK_DWORD
0x4E7C RB3D_CMASK_RDINDEX
-0x4E80 RB3D_AARESOLVE_OFFSET
-0x4E84 RB3D_AARESOLVE_PITCH
-0x4E88 RB3D_AARESOLVE_CTL
0x4EA0 RB3D_DISCARD_SRC_PIXEL_LTE_THRESHOLD
0x4EA4 RB3D_DISCARD_SRC_PIXEL_GTE_THRESHOLD
0x4F04 ZB_ZSTENCILCNTL
diff --git a/drivers/gpu/drm/radeon/reg_srcs/r420 b/drivers/gpu/drm/radeon/reg_srcs/r420
index 989f7a0..6b4035e 100644
--- a/drivers/gpu/drm/radeon/reg_srcs/r420
+++ b/drivers/gpu/drm/radeon/reg_srcs/r420
@@ -771,9 +771,6 @@ r420 0x4f60
0x4E74 RB3D_CMASK_WRINDEX
0x4E78 RB3D_CMASK_DWORD
0x4E7C RB3D_CMASK_RDINDEX
-0x4E80 RB3D_AARESOLVE_OFFSET
-0x4E84 RB3D_AARESOLVE_PITCH
-0x4E88 RB3D_AARESOLVE_CTL
0x4EA0 RB3D_DISCARD_SRC_PIXEL_LTE_THRESHOLD
0x4EA4 RB3D_DISCARD_SRC_PIXEL_GTE_THRESHOLD
0x4F04 ZB_ZSTENCILCNTL
diff --git a/drivers/gpu/drm/radeon/reg_srcs/rs600 b/drivers/gpu/drm/radeon/reg_srcs/rs600
index 6801b86..c0db1f9 100644
--- a/drivers/gpu/drm/radeon/reg_srcs/rs600
+++ b/drivers/gpu/drm/radeon/reg_srcs/rs600
@@ -771,9 +771,6 @@ rs600 0x6d40
0x4E74 RB3D_CMASK_WRINDEX
0x4E78 RB3D_CMASK_DWORD
0x4E7C RB3D_CMASK_RDINDEX
-0x4E80 RB3D_AARESOLVE_OFFSET
-0x4E84 RB3D_AARESOLVE_PITCH
-0x4E88 RB3D_AARESOLVE_CTL
0x4EA0 RB3D_DISCARD_SRC_PIXEL_LTE_THRESHOLD
0x4EA4 RB3D_DISCARD_SRC_PIXEL_GTE_THRESHOLD
0x4F04 ZB_ZSTENCILCNTL
diff --git a/drivers/gpu/drm/radeon/reg_srcs/rv515 b/drivers/gpu/drm/radeon/reg_srcs/rv515
index 38abf63..90a5e0a 100644
--- a/drivers/gpu/drm/radeon/reg_srcs/rv515
+++ b/drivers/gpu/drm/radeon/reg_srcs/rv515
@@ -465,9 +465,6 @@ rv515 0x6d40
0x4E74 RB3D_CMASK_WRINDEX
0x4E78 RB3D_CMASK_DWORD
0x4E7C RB3D_CMASK_RDINDEX
-0x4E80 RB3D_AARESOLVE_OFFSET
-0x4E84 RB3D_AARESOLVE_PITCH
-0x4E88 RB3D_AARESOLVE_CTL
0x4EA0 RB3D_DISCARD_SRC_PIXEL_LTE_THRESHOLD
0x4EA4 RB3D_DISCARD_SRC_PIXEL_GTE_THRESHOLD
0x4EF8 RB3D_CONSTANT_COLOR_AR
--
1.7.4.1


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