From: Zhipeng Lu alexious@zju.edu.cn
stable inclusion from stable-v5.10.214 commit f2e80ac9344aebbff576453d5c0290b332e187ed category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9Q978 CVE: CVE-2024-35829
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 04ae3eb470e52a3c41babe85ff8cee195e4dcbea ]
When lima_vm_map_bo fails, the resources need to be deallocated, or there will be memleaks.
Fixes: 6aebc51d7aef ("drm/lima: support heap buffer creation") Signed-off-by: Zhipeng Lu alexious@zju.edu.cn Signed-off-by: Qiang Yu yuq825@gmail.com Link: https://patchwork.freedesktop.org/patch/msgid/20240117071328.3811480-1-alexi... Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Wang Hai wanghai38@huawei.com Signed-off-by: Guo Mengqi guomengqi3@huawei.com --- drivers/gpu/drm/lima/lima_gem.c | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/lima/lima_gem.c b/drivers/gpu/drm/lima/lima_gem.c index 11223fe348df..894175f2ed49 100644 --- a/drivers/gpu/drm/lima/lima_gem.c +++ b/drivers/gpu/drm/lima/lima_gem.c @@ -74,29 +74,34 @@ int lima_heap_alloc(struct lima_bo *bo, struct lima_vm *vm) } else { bo->base.sgt = kmalloc(sizeof(*bo->base.sgt), GFP_KERNEL); if (!bo->base.sgt) { - sg_free_table(&sgt); - return -ENOMEM; + ret = -ENOMEM; + goto err_out0; } }
ret = dma_map_sgtable(dev, &sgt, DMA_BIDIRECTIONAL, 0); - if (ret) { - sg_free_table(&sgt); - kfree(bo->base.sgt); - bo->base.sgt = NULL; - return ret; - } + if (ret) + goto err_out1;
*bo->base.sgt = sgt;
if (vm) { ret = lima_vm_map_bo(vm, bo, old_size >> PAGE_SHIFT); if (ret) - return ret; + goto err_out2; }
bo->heap_size = new_size; return 0; + +err_out2: + dma_unmap_sgtable(dev, &sgt, DMA_BIDIRECTIONAL, 0); +err_out1: + kfree(bo->base.sgt); + bo->base.sgt = NULL; +err_out0: + sg_free_table(&sgt); + return ret; }
int lima_gem_create_handle(struct drm_device *dev, struct drm_file *file,