From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AG47ELsLJhH0RPXig/OHFtuaZd9wPGn1SAV31zuXyukJ+0jQkdYYn7PRUoDhdQGp55BHhrquY6TY ARC-Seal: i=1; a=rsa-sha256; t=1521214991; cv=none; d=google.com; s=arc-20160816; b=l0omHJkcmRC0cCduLHg7lWnBP5FeyCOaM0hWRy97ynyHliWnsZ1xML7yvm+UIcQqSi VwOBVDCZ7JIfu/EnwA4gjjHVVI04I4GFqvdBngZ014z/F6pbi+nupdhLRBhhgjPwnMoe BvNvt2VUywIF25rNylwZ2S1JxtwStci9VfDwL0kNF4NcdqIprl/nRHEfRi9yLnoPAXE1 HEOHgwan3b61IsWuhnhFgc4uQ1RpAMcCT3Nq8auBWtASTqzem539VdfBVABbpDvFV29R Vhi+8psVdPM9UZy02BVGfQxEGPhmiBB4aEedq5Wjor0dThaYOo83An7idQJNre+09d/p 17Vg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:user-agent:references:in-reply-to:message-id:date :subject:cc:to:from:arc-authentication-results; bh=pSOcPYGdQoUSBSHRMDdsNigXq2EewgXieMyMkhBq49w=; b=GhmsCkHMlWRztMeZKFzTYymhJQfIOiDKrT1OHGA8ukgh8/ozU2OGMX3TzwrJVYJIWB Uo3l0H9sMLUdtvWaT3IPLEYI2eP6/pdT8nkYTK5snVK8ThpXKjcB6M4zzgns5R7/FzhK UamDw6cf42p/WB7mya4HT5rJV8FFtT4zAmq4cxMMvfy/au5Sa1aSqJ+gxDVXZe6mb0OZ /VR4uz7ooqE9OU/NTPt5YYQ78jFnUd8V6G+PiCfJyGBkgEJj2ie85pFXu2GHllb7mRlr CmBHRAKSFfooh7t1+bjXbZIGLzaHhWgj4S/2SbiYHuVCgwTPz84bryWbaF21v6qtC4Q+ 3FIQ== ARC-Authentication-Results: i=1; mx.google.com; spf=softfail (google.com: domain of transitioning gregkh@linuxfoundation.org does not designate 90.92.61.202 as permitted sender) smtp.mailfrom=gregkh@linuxfoundation.org Authentication-Results: mx.google.com; spf=softfail (google.com: domain of transitioning gregkh@linuxfoundation.org does not designate 90.92.61.202 as permitted sender) smtp.mailfrom=gregkh@linuxfoundation.org From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Monk Liu , Alex Deucher , Sasha Levin Subject: [PATCH 4.15 090/128] drm/amdgpu:fix virtual dce bug Date: Fri, 16 Mar 2018 16:23:51 +0100 Message-Id: <20180316152341.043174508@linuxfoundation.org> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180316152336.199007505@linuxfoundation.org> References: <20180316152336.199007505@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-LABELS: =?utf-8?b?IlxcU2VudCI=?= X-GMAIL-THRID: =?utf-8?q?1595109153792103743?= X-GMAIL-MSGID: =?utf-8?q?1595109531084155011?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Monk Liu [ Upstream commit 129d65c18ecfb249aceb540c31fdaf79bd5a11ff ] this fix the issue that access memory after freed after driver unloaded. Signed-off-by: Monk Liu Acked-by: Alex Deucher Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/amd/amdgpu/dce_virtual.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/amd/amdgpu/dce_virtual.c +++ b/drivers/gpu/drm/amd/amdgpu/dce_virtual.c @@ -437,6 +437,8 @@ static int dce_virtual_sw_fini(void *han drm_kms_helper_poll_fini(adev->ddev); drm_mode_config_cleanup(adev->ddev); + /* clear crtcs pointer to avoid dce irq finish routine access freed data */ + memset(adev->mode_info.crtcs, 0, sizeof(adev->mode_info.crtcs[0]) * AMDGPU_MAX_CRTCS); adev->mode_info.mode_config_initialized = false; return 0; } @@ -723,7 +725,7 @@ static void dce_virtual_set_crtc_vblank_ int crtc, enum amdgpu_interrupt_state state) { - if (crtc >= adev->mode_info.num_crtc) { + if (crtc >= adev->mode_info.num_crtc || !adev->mode_info.crtcs[crtc]) { DRM_DEBUG("invalid crtc %d\n", crtc); return; }