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| author | Nikita Zhandarovich <n.zhandarovich@fintech.ru> | 2023-11-29 07:22:30 -0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-11-30 18:26:31 -0500 |
| commit | 39c960bbf9d9ea862398759e75736cfb68c3446f (patch) | |
| tree | 42a0b0bb1fbc5732b172954c443052d94638823d | |
| parent | f875f61b1fd626a4223a5bdf0339b5372c689e13 (diff) | |
| download | lwn-39c960bbf9d9ea862398759e75736cfb68c3446f.tar.gz lwn-39c960bbf9d9ea862398759e75736cfb68c3446f.zip | |
drm/radeon/r600_cs: Fix possible int overflows in r600_cs_check_reg()
While improbable, there may be a chance of hitting integer
overflow when the result of radeon_get_ib_value() gets shifted
left.
Avoid it by casting one of the operands to larger data type (u64).
Found by Linux Verification Center (linuxtesting.org) with static
analysis tool SVACE.
Fixes: 1729dd33d20b ("drm/radeon/kms: r600 CS parser fixes")
Signed-off-by: Nikita Zhandarovich <n.zhandarovich@fintech.ru>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/radeon/r600_cs.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/radeon/r600_cs.c b/drivers/gpu/drm/radeon/r600_cs.c index 638f861af80f..6cf54a747749 100644 --- a/drivers/gpu/drm/radeon/r600_cs.c +++ b/drivers/gpu/drm/radeon/r600_cs.c @@ -1275,7 +1275,7 @@ static int r600_cs_check_reg(struct radeon_cs_parser *p, u32 reg, u32 idx) return -EINVAL; } tmp = (reg - CB_COLOR0_BASE) / 4; - track->cb_color_bo_offset[tmp] = radeon_get_ib_value(p, idx) << 8; + track->cb_color_bo_offset[tmp] = (u64)radeon_get_ib_value(p, idx) << 8; ib[idx] += (u32)((reloc->gpu_offset >> 8) & 0xffffffff); track->cb_color_base_last[tmp] = ib[idx]; track->cb_color_bo[tmp] = reloc->robj; @@ -1302,7 +1302,7 @@ static int r600_cs_check_reg(struct radeon_cs_parser *p, u32 reg, u32 idx) "0x%04X\n", reg); return -EINVAL; } - track->htile_offset = radeon_get_ib_value(p, idx) << 8; + track->htile_offset = (u64)radeon_get_ib_value(p, idx) << 8; ib[idx] += (u32)((reloc->gpu_offset >> 8) & 0xffffffff); track->htile_bo = reloc->robj; track->db_dirty = true; |