diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3804-drm-amdgpu-Check-for-valid-number-of-registers-to-re.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3804-drm-amdgpu-Check-for-valid-number-of-registers-to-re.patch | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3804-drm-amdgpu-Check-for-valid-number-of-registers-to-re.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3804-drm-amdgpu-Check-for-valid-number-of-registers-to-re.patch new file mode 100644 index 00000000..7160056a --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3804-drm-amdgpu-Check-for-valid-number-of-registers-to-re.patch @@ -0,0 +1,36 @@ +From 7a7cd1730ad34efcf3b041fa12b8f1c4e96b06cc Mon Sep 17 00:00:00 2001 +From: Trek <trek00@inbox.ru> +Date: Sat, 31 Aug 2019 21:25:36 +0200 +Subject: [PATCH 3804/4256] drm/amdgpu: Check for valid number of registers to + read + +Do not try to allocate any amount of memory requested by the user. +Instead limit it to 128 registers. Actually the longest series of +consecutive allowed registers are 48, mmGB_TILE_MODE0-31 and +mmGB_MACROTILE_MODE0-15 (0x2644-0x2673). + +Bug: https://bugs.freedesktop.org/show_bug.cgi?id=111273 +Signed-off-by: Trek <trek00@inbox.ru> +Signed-off-by: Alex Deucher <alexander.deucher@amd.com> +Reviewed-by: Alex Deucher <alexander.deucher@amd.com> +--- + drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 3 +++ + 1 file changed, 3 insertions(+) + +diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c +index 9d4e71ee8791..9be4c182242f 100644 +--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c ++++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c +@@ -694,6 +694,9 @@ static int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file + if (sh_num == AMDGPU_INFO_MMR_SH_INDEX_MASK) + sh_num = 0xffffffff; + ++ if (info->read_mmr_reg.count > 128) ++ return -EINVAL; ++ + regs = kmalloc_array(info->read_mmr_reg.count, sizeof(*regs), GFP_KERNEL); + if (!regs) + return -ENOMEM; +-- +2.17.1 + |