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drm/amdgpu/atom: Check kcalloc() for WS buffer in amdgpu_atom_execute_table_locked()

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kcalloc() may fail. When WS is non-zero and allocation fails, ectx.ws
remains NULL while ectx.ws_size is set, leading to a potential NULL
pointer dereference in atom_get_src_int() when accessing WS entries.

Return -ENOMEM on allocation failure to avoid the NULL dereference.

Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Guangshuo Li 2025-09-18 18:57:05 +08:00 committed by Alex Deucher
parent 59e4405e9e
commit cc9a8e238e
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/amd/amdgpu/atom.c
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@ -1246,6 +1246,10 @@ static int amdgpu_atom_execute_table_locked(struct atom_context *ctx, int index,
ectx.last_jump_jiffies = 0;
if (ws) {
ectx.ws = kcalloc(4, ws, GFP_KERNEL);
if (!ectx.ws) {
ret = -ENOMEM;
goto free;
}
ectx.ws_size = ws;
} else {
ectx.ws = NULL;