From nobody Fri Nov 29 04:55:06 2024 Received: from MSK-MAILEDGE.securitycode.ru (msk-mailedge.securitycode.ru [195.133.217.143]) (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 A1DB3126BF7; Tue, 24 Sep 2024 11:40:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=195.133.217.143 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727178039; cv=none; b=q/ALOfhwU36PTR+AaBDKKjH4UW0V74xxWdvoJl+B7KsIxPJeLxftplfcacTrOQLB+Bf0nAyrJk1o+ONv0w9qwq+OFWycOF70D5c+ZBOoMRElAVeJsGEl4xMkZ2n6fa9NabQKPQv8QLAj3BXo4ynLV5pwokv/dxcMon7Lm95Sqos= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727178039; c=relaxed/simple; bh=8digug/2eny5eemeKKr826HxeviLtUFg+wRijkLLm4g=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=MWn3uTAz4DRV87ccEKhiG8AkiWjU6j0WCcFg6b3ZAER/RBKCCH5sK9NF6OOLSArHANqKE1s1YTmB+z+ULqSVbLAotdrl3LJqtl40TbuhEGrEXT+7xNQlzehsRaZk/aelNdgd1ln79zOIrjX0iXa7TsIS16CjIJeK3LGZmzvz/Hs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=securitycode.ru; spf=pass smtp.mailfrom=securitycode.ru; arc=none smtp.client-ip=195.133.217.143 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=securitycode.ru Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=securitycode.ru From: George Rurikov To: Jani Nikula CC: George Rurikov , Rodrigo Vivi , Joonas Lahtinen , Tvrtko Ursulin , David Airlie , Simona Vetter , , , , , Subject: [PATCH] drm: Add check for encoder in intel_get_crtc_new_encoder() Date: Tue, 24 Sep 2024 14:40:04 +0300 Message-ID: <20240924114004.1084283-1-g.ryurikov@securitycode.ru> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" X-ClientProxiedBy: SPB-EX2.Securitycode.ru (172.16.24.92) To MSK-EX2.Securitycode.ru (172.17.8.92) If the video card driver could not find the connector assigned to the current video controller, or if the hardware status has changed so that a pre-existing connector is no longer active, none of the state connectors will meet the assignment criteria for the current crtc video controller. In the drm_WARN function, encoder->base.dev is called, so '&encoder->base.dev' will be dereferenced since encoder will still be initialized NULL. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: e12d6218fda2 ("drm/i915: Reduce bigjoiner special casing") Cc: stable@vger.kernel.org Signed-off-by: George Rurikov --- drivers/gpu/drm/i915/display/intel_display.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm= /i915/display/intel_display.c index b4ef4d59da1a..1f25b12e5f67 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -819,9 +819,11 @@ intel_get_crtc_new_encoder(const struct intel_atomic_s= tate *state, num_encoders++; } - drm_WARN(state->base.dev, num_encoders !=3D 1, + if (encoder) { + drm_WARN(state->base.dev, num_encoders !=3D 1, "%d encoders for pipe %c\n", num_encoders, pipe_name(primary_crtc->pipe)); + } return encoder; } -- 2.34.1 =D0=97=D0=B0=D1=8F=D0=B2=D0=BB=D0=B5=D0=BD=D0=B8=D0=B5 =D0=BE =D0=BA=D0=BE= =D0=BD=D1=84=D0=B8=D0=B4=D0=B5=D0=BD=D1=86=D0=B8=D0=B0=D0=BB=D1=8C=D0=BD=D0= =BE=D1=81=D1=82=D0=B8 =D0=94=D0=B0=D0=BD=D0=BD=D0=BE=D0=B5 =D1=8D=D0=BB=D0=B5=D0=BA=D1=82=D1=80= =D0=BE=D0=BD=D0=BD=D0=BE=D0=B5 =D0=BF=D0=B8=D1=81=D1=8C=D0=BC=D0=BE =D0=B8 = =D0=BB=D1=8E=D0=B1=D1=8B=D0=B5 =D0=BF=D1=80=D0=B8=D0=BB=D0=BE=D0=B6=D0=B5= =D0=BD=D0=B8=D1=8F =D0=BA =D0=BD=D0=B5=D0=BC=D1=83 =D1=8F=D0=B2=D0=BB=D1=8F= =D1=8E=D1=82=D1=81=D1=8F =D0=BA=D0=BE=D0=BD=D1=84=D0=B8=D0=B4=D0=B5=D0=BD= =D1=86=D0=B8=D0=B0=D0=BB=D1=8C=D0=BD=D1=8B=D0=BC=D0=B8 =D0=B8 =D0=BF=D1=80= =D0=B5=D0=B4=D0=BD=D0=B0=D0=B7=D0=BD=D0=B0=D1=87=D0=B5=D0=BD=D1=8B =D0=B8= =D1=81=D0=BA=D0=BB=D1=8E=D1=87=D0=B8=D1=82=D0=B5=D0=BB=D1=8C=D0=BD=D0=BE = =D0=B4=D0=BB=D1=8F =D0=B0=D0=B4=D1=80=D0=B5=D1=81=D0=B0=D1=82=D0=B0. =D0=95= =D1=81=D0=BB=D0=B8 =D0=92=D1=8B =D0=BD=D0=B5 =D1=8F=D0=B2=D0=BB=D1=8F=D0=B5= =D1=82=D0=B5=D1=81=D1=8C =D0=B0=D0=B4=D1=80=D0=B5=D1=81=D0=B0=D1=82=D0=BE= =D0=BC =D0=B4=D0=B0=D0=BD=D0=BD=D0=BE=D0=B3=D0=BE =D0=BF=D0=B8=D1=81=D1=8C= =D0=BC=D0=B0, =D0=BF=D0=BE=D0=B6=D0=B0=D0=BB=D1=83=D0=B9=D1=81=D1=82=D0=B0,= =D1=83=D0=B2=D0=B5=D0=B4=D0=BE=D0=BC=D0=B8=D1=82=D0=B5 =D0=BD=D0=B5=D0=BC= =D0=B5=D0=B4=D0=BB=D0=B5=D0=BD=D0=BD=D0=BE =D0=BE=D1=82=D0=BF=D1=80=D0=B0= =D0=B2=D0=B8=D1=82=D0=B5=D0=BB=D1=8F, =D0=BD=D0=B5 =D1=80=D0=B0=D1=81=D0=BA= =D1=80=D1=8B=D0=B2=D0=B0=D0=B9=D1=82=D0=B5 =D1=81=D0=BE=D0=B4=D0=B5=D1=80= =D0=B6=D0=B0=D0=BD=D0=B8=D0=B5 =D0=B4=D1=80=D1=83=D0=B3=D0=B8=D0=BC =D0=BB= =D0=B8=D1=86=D0=B0=D0=BC, =D0=BD=D0=B5 =D0=B8=D1=81=D0=BF=D0=BE=D0=BB=D1=8C= =D0=B7=D1=83=D0=B9=D1=82=D0=B5 =D0=B5=D0=B3=D0=BE =D0=B2 =D0=BA=D0=B0=D0=BA= =D0=B8=D1=85-=D0=BB=D0=B8=D0=B1=D0=BE =D1=86=D0=B5=D0=BB=D1=8F=D1=85, =D0= =BD=D0=B5 =D1=85=D1=80=D0=B0=D0=BD=D0=B8=D1=82=D0=B5 =D0=B8 =D0=BD=D0=B5 = =D0=BA=D0=BE=D0=BF=D0=B8=D1=80=D1=83=D0=B9=D1=82=D0=B5 =D0=B8=D0=BD=D1=84= =D0=BE=D1=80=D0=BC=D0=B0=D1=86=D0=B8=D1=8E =D0=BB=D1=8E=D0=B1=D1=8B=D0=BC = =D1=81=D0=BF=D0=BE=D1=81=D0=BE=D0=B1=D0=BE=D0=BC.