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 894AE1487CE; Wed, 3 Jul 2024 11:29:59 +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=1720006199; cv=none; b=ndRqF0AJfIzIf0mjObiU8f5PoYA8+lEUnUoONKzBrsWtjLkox0GcyXN9KeqHuT7+hKQHJ30C6tPKmZNDY3GeNLqaURwkCBH7pBpwaSux84E8DChatTMy6kW/5TedEBtU1Xez+hvS0+ZlKG+euIkTI7SxAL7F5yHIhDdme26SCFc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720006199; c=relaxed/simple; bh=2EAMCMIEOIMpQtbQYRy2Z4GNSRh1v6Pi+P6Hgm7DV+M=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=TJoP5Xf7EvofHOzdsPo8ojLvbDFmnTVXO205f5+VURcZBkwvDsbBnfEqDDGARZbYKKv0dVPDCoFIiQEGDQTLIOpIMA9aPG/z8/G/iWt61q0cSQW1APsI1+JHlXC3rZlwFgg+Uxe1l5xdIqn2rfZrc4xZM51iw/fuwio3tBoVE6M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=UrOVUFLT; 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="UrOVUFLT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0F73DC2BD10; Wed, 3 Jul 2024 11:29:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1720006199; bh=2EAMCMIEOIMpQtbQYRy2Z4GNSRh1v6Pi+P6Hgm7DV+M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UrOVUFLTyWXze4C9hkFLaC6hrlLJKV1X+OvsQM9dDWvLVll1VELWrR3TpXPr28I/l suPJYU1/5YLV5Et5KPMJjTckU+AQinSdhpxPMr69I+b6RSa6y4zP9wwlSyldpj5/BH YdC8FQh+XGd3aEwZt0OWteSbHxQt0vjINf7/9RYg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ma Ke , Lyude Paul Subject: [PATCH 5.15 333/356] drm/nouveau/dispnv04: fix null pointer dereference in nv17_tv_get_ld_modes Date: Wed, 3 Jul 2024 12:41:09 +0200 Message-ID: <20240703102925.708716950@linuxfoundation.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240703102913.093882413@linuxfoundation.org> References: <20240703102913.093882413@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ma Ke commit 66edf3fb331b6c55439b10f9862987b0916b3726 upstream. In nv17_tv_get_ld_modes(), the return value of drm_mode_duplicate() is assigned to mode, which will lead to a possible NULL pointer dereference on failure of drm_mode_duplicate(). Add a check to avoid npd. Cc: stable@vger.kernel.org Signed-off-by: Ma Ke Signed-off-by: Lyude Paul Link: https://patchwork.freedesktop.org/patch/msgid/20240625081828.2620794-1-make24@iscas.ac.cn Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/nouveau/dispnv04/tvnv17.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c +++ b/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c @@ -208,6 +208,8 @@ static int nv17_tv_get_ld_modes(struct d struct drm_display_mode *mode; mode = drm_mode_duplicate(encoder->dev, tv_mode); + if (!mode) + continue; mode->clock = tv_norm->tv_enc_mode.vrefresh * mode->htotal / 1000 *