Commit 1a8e9bad authored by Kunwu Chan's avatar Kunwu Chan Committed by Jani Nikula
Browse files

drm/i915: Fix potential spectre vulnerability 



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: d4433c76 ("drm/i915/gem: Use the proto-context to handle create parameters (v5)")
Cc: <stable@vger.kernel.org> # v5.15+
Signed-off-by: default avatarKunwu Chan <chentao@kylinos.cn>
Reviewed-by: default avatarTvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Signed-off-by: default avatarTvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231103110922.430122-1-tvrtko.ursulin@linux.intel.com


(cherry picked from commit 27b08638)
Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
parent 0cb89cd4

drivers/gpu/drm/i915/gem/i915_gem_context.c

+1 −0
Original line number Diff line number Diff line
@@ -844,6 +844,7 @@ static int set_proto_ctx_sseu(struct drm_i915_file_private *fpriv, 
		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. */