From: Guangshuo Li <lgs201920130244@gmail.com>
commit cc9a8e238e42c1f43b98c097995137d644b69245 upstream.
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>
[ Roman: added parentheses to the 'if' statement, matching the upstream
commit. ]
Signed-off-by: Roman Demidov <roman.demidov.nn@gmail.com>
---
Backport fix for CVE-2025-68190
drivers/gpu/drm/amd/amdgpu/atom.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/atom.c b/drivers/gpu/drm/amd/amdgpu/atom.c
index cb6eb47aab65..0a7666be1dea 100644
--- a/drivers/gpu/drm/amd/amdgpu/atom.c
+++ b/drivers/gpu/drm/amd/amdgpu/atom.c
@@ -1228,10 +1228,15 @@ static int amdgpu_atom_execute_table_locked(struct atom_context *ctx, int index,
ectx.ps = params;
ectx.abort = false;
ectx.last_jump = 0;
- if (ws)
+ if (ws) {
ectx.ws = kcalloc(4, ws, GFP_KERNEL);
- else
+ if (!ectx.ws) {
+ ret = -ENOMEM;
+ goto free;
+ }
+ } else {
ectx.ws = NULL;
+ }
debug_depth++;
while (1) {
--
2.53.0