diff options
| author | Huiwen He <hehuiwen@kylinos.cn> | 2025-11-13 01:19:47 +0800 |
|---|---|---|
| committer | Rob Clark <rob.clark@oss.qualcomm.com> | 2025-11-17 09:43:58 -0800 |
| commit | 3065e6a4d3594b42dae6176b3e2c0c3563cf94b8 (patch) | |
| tree | e4e9cd12b6e65f0e0c35bbd32772f8f945194ece /drivers/gpu/drm/msm | |
| parent | 3099e0247e3217e1b39c1c61766e06ec3d13835f (diff) | |
drm/msm: fix missing NULL check after kcalloc in crashstate_get_bos()
The crashstate_get_bos() function allocates memory for `state->bos`
using kcalloc(), but the vmbind path does not check for allocation
failure before dereferencing it in the following drm_gpuvm_for_each_va()
loop. This could lead to a NULL pointer dereference if memory allocation
fails.
Fix this by wrapping the drm_gpuvm_for_each_va() loop with a NULL check
on state->bos, similar to the safety check in the non-vmbind path.
Fixes: af9aa6f316b3d ("drm/msm: Crashdump support for sparse")
Signed-off-by: Huiwen He <hehuiwen@kylinos.cn>
Patchwork: https://patchwork.freedesktop.org/patch/687556/
Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>
Diffstat (limited to 'drivers/gpu/drm/msm')
| -rw-r--r-- | drivers/gpu/drm/msm/msm_gpu.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c index e23f70fbc8cb..dd0605fe1243 100644 --- a/drivers/gpu/drm/msm/msm_gpu.c +++ b/drivers/gpu/drm/msm/msm_gpu.c @@ -287,16 +287,17 @@ static void crashstate_get_bos(struct msm_gpu_state *state, struct msm_gem_submi state->bos = kcalloc(cnt, sizeof(struct msm_gpu_state_bo), GFP_KERNEL); - drm_gpuvm_for_each_va (vma, submit->vm) { - bool dump = rd_full || (vma->flags & MSM_VMA_DUMP); + if (state->bos) + drm_gpuvm_for_each_va(vma, submit->vm) { + bool dump = rd_full || (vma->flags & MSM_VMA_DUMP); - /* Skip MAP_NULL/PRR VMAs: */ - if (!vma->gem.obj) - continue; + /* Skip MAP_NULL/PRR VMAs: */ + if (!vma->gem.obj) + continue; - msm_gpu_crashstate_get_bo(state, vma->gem.obj, vma->va.addr, - dump, vma->gem.offset, vma->va.range); - } + msm_gpu_crashstate_get_bo(state, vma->gem.obj, vma->va.addr, + dump, vma->gem.offset, vma->va.range); + } drm_exec_fini(&exec); } else { |