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drm/amdgpu: Limit BO list entry count to prevent resource exhaustion

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From Jesse.Zhang
5ce4a38e6c2488949e373d5066303f9c128db614 in linux-6.18.y/6.18.20
6270b1a5dab94665d7adce3dc78bc9066ed28bdd in mainline linux
This commit is contained in:
jsg
2026-03-25 23:42:23 +00:00
parent 4bf88bbb0b
commit d4530f2f4c
1 changed files with 4 additions and 0 deletions
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4
sys/dev/pci/drm/amd/amdgpu/amdgpu_bo_list.c
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@@ -36,6 +36,7 @@
#define AMDGPU_BO_LIST_MAX_PRIORITY 32u
#define AMDGPU_BO_LIST_NUM_BUCKETS (AMDGPU_BO_LIST_MAX_PRIORITY + 1)
#define AMDGPU_BO_LIST_MAX_ENTRIES (128 * 1024)
static void amdgpu_bo_list_free_rcu(struct rcu_head *rcu)
{
@@ -194,6 +195,9 @@ int amdgpu_bo_create_list_entry_array(struct drm_amdgpu_bo_list_in *in,
const uint32_t bo_number = in->bo_number;
struct drm_amdgpu_bo_list_entry *info;
if (bo_number > AMDGPU_BO_LIST_MAX_ENTRIES)
return -EINVAL;
/* copy the handle array from userspace to a kernel buffer */
if (likely(info_size == bo_info_size)) {
info = vmemdup_array_user(uptr, bo_number, info_size);