5.15-stable review patch. If anyone has any objections, please let me know.
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From: Kunwu Chan chentao@kylinos.cn
commit 1a8e9bad6ef563c28ab0f8619628d5511be55431 upstream.
Fix smatch warning: drivers/gpu/drm/i915/gem/i915_gem_context.c:847 set_proto_ctx_sseu() warn: potential spectre issue 'pc->user_engines' [r] (local cap)
Fixes: d4433c7600f7 ("drm/i915/gem: Use the proto-context to handle create parameters (v5)") Cc: stable@vger.kernel.org # v5.15+ Signed-off-by: Kunwu Chan chentao@kylinos.cn Reviewed-by: Tvrtko Ursulin tvrtko.ursulin@linux.intel.com Signed-off-by: Tvrtko Ursulin tvrtko.ursulin@intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20231103110922.430122-1-tvrtko... (cherry picked from commit 27b086382c22efb7e0a16442f7bdc2e120108ef3) Signed-off-by: Jani Nikula jani.nikula@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/i915/gem/i915_gem_context.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/gpu/drm/i915/gem/i915_gem_context.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c @@ -642,6 +642,7 @@ static int set_proto_ctx_sseu(struct drm if (idx >= pc->num_user_engines) return -EINVAL;
+ idx = array_index_nospec(idx, pc->num_user_engines); pe = &pc->user_engines[idx];
/* Only render engine supports RPCS configuration. */