From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 885DD1DF74F; Tue, 8 Jul 2025 16:31:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751992286; cv=none; b=pQmEODjuzhBlmmv3+sBceiEigCIsODqDnsDY/JGnL7Vx8epu6vH/oyO/A8oTXwNiktFgEZikHZMNF+G7vTBELJps6ECjl26/Y9KFVh1CHxx1oGaRRMnZYm8Zq/u9Met1/vjZfokrrf5MjJWkEDuhwOeBFy6YXIKdABTt3XcwSbk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751992286; c=relaxed/simple; bh=w9w8Dzcfu4pchOKlP21jOV0/YibDDxicX8ebagsCmQg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=eT28MLTMeZLe3w2cNSHmnrYiFcW4V87dbWd1gMsjq0Sxu6QTHPE+/PY0hWS6LLlPA+rvpsm6beSaMyM2jQUtjFu8KsLw1SOs4gYL6z5sXYo4DG0M9+u9ZxMzC9EahHAOG4/BQhBQFFqr9UBfg1e9U6D40XLQ9zTX2iJNfGPiIFY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=uoiK27Zp; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="uoiK27Zp" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 12786C4CEF5; Tue, 8 Jul 2025 16:31:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1751992286; bh=w9w8Dzcfu4pchOKlP21jOV0/YibDDxicX8ebagsCmQg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uoiK27ZplikwBXQUG907q3Q0FdUG8RrcBYou2peXg/eGqrBoI9RgX8k16Ocs0D+yq EqlnWMvUX29mTNIDW3hObnhN1XYmwJFBTMpA5VmZhV0XKiBGq5KGYsfpBgsMHF8nkS wgnfpNL4jYqzrx3qG1q8VvXN+UFcjzchsQNrKNlM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dan Carpenter , Rodrigo Vivi , Joonas Lahtinen , Sasha Levin Subject: [PATCH 6.6 040/132] drm/i915/selftests: Change mock_request() to return error pointers Date: Tue, 8 Jul 2025 18:22:31 +0200 Message-ID: <20250708162231.856030448@linuxfoundation.org> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250708162230.765762963@linuxfoundation.org> References: <20250708162230.765762963@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dan Carpenter [ Upstream commit caa7c7a76b78ce41d347003f84975125383e6b59 ] There was an error pointer vs NULL bug in __igt_breadcrumbs_smoketest(). The __mock_request_alloc() function implements the smoketest->request_alloc() function pointer. It was supposed to return error pointers, but it propogates the NULL return from mock_request() so in the event of a failure, it would lead to a NULL pointer dereference. To fix this, change the mock_request() function to return error pointers and update all the callers to expect that. Fixes: 52c0fdb25c7c ("drm/i915: Replace global breadcrumbs with per-context interrupt tracking") Signed-off-by: Dan Carpenter Reviewed-by: Rodrigo Vivi Link: https://lore.kernel.org/r/685c1417.050a0220.696f5.5c05@mx.google.com Signed-off-by: Rodrigo Vivi (cherry picked from commit 778fa8ad5f0f23397d045c7ebca048ce8def1c43) Signed-off-by: Joonas Lahtinen Signed-off-by: Sasha Levin --- drivers/gpu/drm/i915/selftests/i915_request.c | 20 +++++++++---------- drivers/gpu/drm/i915/selftests/mock_request.c | 2 +- 2 files changed, 11 insertions(+), 11 deletions(-) diff --git a/drivers/gpu/drm/i915/selftests/i915_request.c b/drivers/gpu/drm/i915/selftests/i915_request.c index a9b79888c1931..c7ce2c570ad1f 100644 --- a/drivers/gpu/drm/i915/selftests/i915_request.c +++ b/drivers/gpu/drm/i915/selftests/i915_request.c @@ -73,8 +73,8 @@ static int igt_add_request(void *arg) /* Basic preliminary test to create a request and let it loose! */ request = mock_request(rcs0(i915)->kernel_context, HZ / 10); - if (!request) - return -ENOMEM; + if (IS_ERR(request)) + return PTR_ERR(request); i915_request_add(request); @@ -91,8 +91,8 @@ static int igt_wait_request(void *arg) /* Submit a request, then wait upon it */ request = mock_request(rcs0(i915)->kernel_context, T); - if (!request) - return -ENOMEM; + if (IS_ERR(request)) + return PTR_ERR(request); i915_request_get(request); @@ -160,8 +160,8 @@ static int igt_fence_wait(void *arg) /* Submit a request, treat it as a fence and wait upon it */ request = mock_request(rcs0(i915)->kernel_context, T); - if (!request) - return -ENOMEM; + if (IS_ERR(request)) + return PTR_ERR(request); if (dma_fence_wait_timeout(&request->fence, false, T) != -ETIME) { pr_err("fence wait success before submit (expected timeout)!\n"); @@ -219,8 +219,8 @@ static int igt_request_rewind(void *arg) GEM_BUG_ON(IS_ERR(ce)); request = mock_request(ce, 2 * HZ); intel_context_put(ce); - if (!request) { - err = -ENOMEM; + if (IS_ERR(request)) { + err = PTR_ERR(request); goto err_context_0; } @@ -237,8 +237,8 @@ static int igt_request_rewind(void *arg) GEM_BUG_ON(IS_ERR(ce)); vip = mock_request(ce, 0); intel_context_put(ce); - if (!vip) { - err = -ENOMEM; + if (IS_ERR(vip)) { + err = PTR_ERR(vip); goto err_context_1; } diff --git a/drivers/gpu/drm/i915/selftests/mock_request.c b/drivers/gpu/drm/i915/selftests/mock_request.c index 09f747228dff5..1b0cf073e9643 100644 --- a/drivers/gpu/drm/i915/selftests/mock_request.c +++ b/drivers/gpu/drm/i915/selftests/mock_request.c @@ -35,7 +35,7 @@ mock_request(struct intel_context *ce, unsigned long delay) /* NB the i915->requests slab cache is enlarged to fit mock_request */ request = intel_context_create_request(ce); if (IS_ERR(request)) - return NULL; + return request; request->mock.delay = delay; return request; -- 2.39.5