From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (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 B066B45198E for ; Thu, 24 Sep 2026 22:42:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790289765; cv=none; b=V08UeN1QkYrQEp4n7fw4oIcPwDhFwS0VwIKffEBHzbf9mgjMzpJeN91OzbZhkh1icB3tknAEdJlMYU7hjFUsRsJK1rssf1BG6htXJfwg65+e//vcwqW0ioSWiE5ukzB3USnu4l42FOubeBBx5wh9KUCf1aK468D64FACZa2PF0Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790289765; c=relaxed/simple; bh=2G1FOvOSJrV6/l8sO+qjbSBFUO9X0CWF5KTVr1JnZkM=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=qtJNEvXT85+QKlWrEfQ3SxA+E0Vra7VfzcahcFzuAq+lnDtT8+PYqcAbiiSdjwscL+qG0x1rV99Y69YM1ObzXxn8idwAoKxeYB4A9aeoI/fyrknIufBo2WsC5l9iihCxcgg+IQcSHUZmv+U6eWkEgT8155VrE3JBjcobEC5vKa8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com; spf=pass smtp.mailfrom=oss.qualcomm.com; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b=eaJiYBco; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b=Pg6xO2H4; arc=none smtp.client-ip=205.220.168.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b="eaJiYBco"; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b="Pg6xO2H4" Received: from pps.filterd (m0279866.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 68OMOoGr2766695 for ; Thu, 24 Sep 2026 22:42:41 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qualcomm.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= 81QaywXThCj9GvWcrqbFC8hrrggxf6pFQEEvB0A8Stc=; b=eaJiYBcoVJ7qevSl dhfq+tXf9Yrht/mLq/jwiRTObIgOPPAp4gq7bt1mDqjTW0V6kXIW+8178jTvvqEY /g72Tu5uLFr9TmxDOZ/WTOw4Db3jptMoLUpu03x0RYDq28zhhqtQH8+V6kNLVLAO 1Ua+MyDrNoK2wgREaJE/EZogzihYwOq1s6HaLVkWSmzeuJh3HKsCfCtwvHP6+Jd8 ENol9vchyHUhmq3K8SCqt3P2t3zGBv8XLggSyAt3yjEQk8zBoVPz6YK9sKvOoTjx qeijDJMaDaBEWWHG3mt12b/Lo717uv1T508Ea2fRW/yjOhQsk+HBOm2Y6914Juvl Prcy/g== Received: from mail-dy1-f197.google.com (mail-dy1-f197.google.com [74.125.82.197]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4gw94k8tmr-1 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT) for ; Thu, 24 Sep 2026 22:42:40 +0000 (GMT) Received: by mail-dy1-f197.google.com with SMTP id 5a478bee46e88-33310847fcaso426150eec.1 for ; Thu, 24 Sep 2026 15:42:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oss.qualcomm.com; s=google; t=1790289760; x=1790894560; darn=lists.linux.dev; h=content-transfer-encoding:content-type:mime-version:organization :references:in-reply-to:message-id:subject:cc:to:from:date:from:to :cc:subject:date:message-id:reply-to:content-type; bh=81QaywXThCj9GvWcrqbFC8hrrggxf6pFQEEvB0A8Stc=; b=Pg6xO2H44kyewz8JjrRJeUvFe0WIc3Ab3f6vgiAb8x7cV4GAnYMPGQb2bt7cE+ZxaZ 1hpneqCaKd5FMdLCLR8u9RJEC06L2xqSzhUpzlauHmdjYcXotuwHaFOrunJeTsu2chTN HO8J6Nbm8l1vZP3sXHitbIfsjfxyvyPdkhAjHQP2wJR9j/zBEAnYLzDeVj8EedGoDpwr 9fA4CXVzQoWBHl2hB0YW4xUZEKsmCG5jBBxTrOkNeZpINexVJP6U0330FJn2241JvdrY BLIiNdhcJoWxDb/ZXnnokkhGOBg0Ift7a8kQZ3fsKhWdyDU0YUS35NlXfWATk5ah9rqd QpjQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1790289760; x=1790894560; h=content-transfer-encoding:content-type:mime-version:organization :references:in-reply-to:message-id:subject:cc:to:from:date:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=81QaywXThCj9GvWcrqbFC8hrrggxf6pFQEEvB0A8Stc=; b=iYLz68TGypcRPZ+nHIqhWoXGiXrLkTax0DgcBSkplNclubz5f//Btkug7PPQi4POj+ nAWUVIAiL2S8o5Z6P8TFk6urfsu6ltCN8XiZBMiJPSmoEv+BcbaonG5wk9Un2fF/WFd/ byiC+Y/njEwF+M2TI7FA1L+4/zAyTr+aiEOkQqfL6mU+d4lJpIFR7Efg3qKwwCRBOAtG 8Ei6aKxfkmjCwS7+4zg+Ml/BkPRUy65snSwk3iX6UHARDi/fepzN3UF1yUtxgyfOwVZD LEt7sWbtVnULG9zaP6KoASdy3po5fxLjP2Zsyv3TQOPf09pnS3U/JCSJ3iuenCLWvObs ZVtA== X-Forwarded-Encrypted: i=1; AKwUvByVcZLssMmDCtRJMCdaO3tc+wKuLJdvJyGtwRxcrsE3DJ9r1mTLzJOshNRYAhDVnVRa8ov0hvpq@lists.linux.dev X-Gm-Message-State: AFuF++kdwHJxSlw/baO1uKp5DVx0Y6Axi7ivAIWnytH219e6CJcukDJ8 4xPEv+7UEIh/HNGY6G4WCCmNlYerC+SBfFeyhmriGXP7uU7h+jLRM7pWkjorpGR1rZmmBDa9YLK 1cHiw117lGLDvMdiku5bomUuuSB6ws+JB6Hh8CoBmpDBB17kFjkAwlGcFzpUm X-Gm-Gg: AYBFou2FbvqdUU05AwVA0J2J5QxdzK/wrpeet9Gc2W5MFcp/FzbCOTVQVavFf+oqcY5 LEvXtFmaX5TAWNyz+AvkSOqavzUb+/zs8ahhlL4w+JRgCs5pjr49XDg5+jtaXjjHk04SMZDUyoG ZCi7nm1R8gDgy/4906EGJmXNr9CbAjC8jiA7akLdoFa9MHNAlBnxx9w4oyKU8Mm8AUK67eyqUlU UrkRkAhU1uoPmsG+SHlU+mC1kW1Oh5TYoSM4CYvdGnPCOb7NXW64Eu+4nIHmG12+Nc3H/vTHnyH +uE9j1DAJtYB0fLs1b7SrjWcYNQu89cLi31JZq9dhyhfd7sSVCaV78J7FAIIfilsMTvtZGFmOoL vAOp1i4z7OeOboIDN8U63/U8qyeAHoN/2NfsjgDmI3w+AO698I1n12g== X-Received: by 2002:a05:693c:601c:b0:341:4f3:8f84 with SMTP id 5a478bee46e88-341973cf3cfmr121088eec.13.1790289760248; Thu, 24 Sep 2026 15:42:40 -0700 (PDT) X-Received: by 2002:a05:693c:601c:b0:341:4f3:8f84 with SMTP id 5a478bee46e88-341973cf3cfmr120917eec.13.1790289752160; Thu, 24 Sep 2026 15:42:32 -0700 (PDT) Received: from localhost (i-global254.qualcomm.com. [199.106.103.254]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-34145d0fc9fsm1538764eec.25.2026.09.24.15.42.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Sep 2026 15:42:31 -0700 (PDT) Date: Thu, 24 Sep 2026 15:42:27 -0700 From: Jonathan Cameron To: Jason Gunthorpe Cc: Alexandre Ghiti , Albert Ou , Ard Biesheuvel , Arnd Bergmann , Catalin Marinas , Jonathan Corbet , David Sterba , Ilias Apalodimas , linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-efi@vger.kernel.org, linux-riscv@lists.infradead.org, Mark Rutland , Palmer Dabbelt , Paul Walmsley , Randy Dunlap , Simon Glass , Shuah Khan , Nick Terrell , Will Deacon , Alexandre Ghiti , Conor Dooley , linux-integrity@vger.kernel.org, Palmer Dabbelt , patches@lists.linux.dev, Ross Philipson , Sami Tolvanen , Song Shuai Subject: Re: [PATCH 01/16] efi/libstub: Fix error unwind freeing fdt in allocate_new_fdt_and_exit_boot() Message-ID: <20260924154227.00001cbe@oss.qualcomm.com> In-Reply-To: <1-v1-27d06b313981+8b-arm64_drtm_jgg@nvidia.com> References: <0-v1-27d06b313981+8b-arm64_drtm_jgg@nvidia.com> <1-v1-27d06b313981+8b-arm64_drtm_jgg@nvidia.com> Organization: Qualcomm X-Mailer: Claws Mail 4.4.0 (GTK 3.24.51; x86_64-w64-mingw32) Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=aaj0Dhot c=1 sm=1 tr=0 ts=6ab5a761 cx=c_pps a=Uww141gWH0fZj/3QKPojxA==:117 a=JYp8KDb2vCoCEuGobkYCKw==:17 a=kj9zAlcOel0A:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=YMgV9FUhrdKAYTUUvYB2:22 a=Ikd4Dj_1AAAA:8 a=EUspDBNiAAAA:8 a=7U2iMG9xLqzP7ZOKqLsA:9 a=+jEqtf1s3R9VXZ0wqowq2kgwd+I=:19 a=CjuIK1q_8ugA:10 a=PxkB5W3o20Ba91AHUih5:22 X-Proofpoint-GUID: 2qMEW7ZCY7eE_kepZQO254lMMraQMTlv X-Proofpoint-ORIG-GUID: 2qMEW7ZCY7eE_kepZQO254lMMraQMTlv X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTI0MDA5MiBTYWx0ZWRfX/M87KSrlKsou skIlbOWqOEi5ppEDKF7R9tXIi5d7nfkeY6H5TsmG4qk8K/4XKGvhR3QfKW4B3sHwA780J87NxUH Zz4O5FF6V1ZsyeNDWJb34CJ3Gp6JP8+VENjcGhLYZYRCnmmVb6LQNTrc96+3dqTramRKW3c1GGZ kj71OazaDGT2BW0fvcLXvrtyTQ/8RYd+JNa3LZ0ZokLIilth1lj5pz2cQs+E7iMe6lrs2l5Y1yS 6p2QmAlGkBVIBKZtie8G/88zK4JQagEmk13yynEh/tGjSR4Bo6JVsw664WolemmcJsvOyR8IrKk bydgHXoi2zxft9rTkZ9tL2F/KAm+1VKG8MvKYzwam8Ovn7NiuW2RhzSCAVn3tws4KjgfzhnGopW 3svBO3S8VH6eIhFGHwvj9QaRLELf55oFj5/eEIhSNl9SVuzeTgMrRItMS0OFgQDVWbzYYZw3uY/ 8Ic9nLHUbCgyFuBJ91Q== X-Proofpoint-Spam-Info: AW1haW4tMjYwOTI0MDA5MiBTYWx0ZWRfX8W3aqVqePaGo TjJ+gXqyTgszJmchmRl3q0tOYq99TYq2s7v0Y69IjU3fF5AkSolWnM4sgP1pxB4ofjD3qmdlt7h Dvf6npuVG71DUqKs6IXdiJz3SiYfij0= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-24_06,2026-09-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 malwarescore=0 priorityscore=1501 spamscore=0 bulkscore=0 clxscore=1011 phishscore=0 impostorscore=0 adultscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609240092 On Thu, 24 Sep 2026 10:53:04 -0300 Jason Gunthorpe wrote: > Sashiko says fdt_addr can point to either an allocated fdt or the fdt from > get_fdt() which is memory owned by FW. > > Only the allocated fdt should be freed on the error unwind path. Use a > dedicated variable for the allocation's size so that the free does not get > confused. > > Fixes: 4fc8e738ff3e ("efi: libstub: remove DT dependency from generic stub") > Signed-off-by: Jason Gunthorpe > --- > drivers/firmware/efi/libstub/fdt.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/drivers/firmware/efi/libstub/fdt.c b/drivers/firmware/efi/libstub/fdt.c > index 23b3543d3041b0..5b2dd709d7b151 100644 > --- a/drivers/firmware/efi/libstub/fdt.c > +++ b/drivers/firmware/efi/libstub/fdt.c > @@ -229,6 +229,7 @@ efi_status_t allocate_new_fdt_and_exit_boot(void *handle, > u32 desc_ver; > efi_status_t status; > struct exit_boot_struct priv; > + unsigned long fdt_size_allocated = 0; > unsigned long fdt_addr = 0; > unsigned long fdt_size = 0; > > @@ -257,6 +258,7 @@ efi_status_t allocate_new_fdt_and_exit_boot(void *handle, > efi_err("Failed to load device tree!\n"); > goto fail; > } > + fdt_size_allocated = fdt_size; Hmm. I argued with myself for a while on this. Which one of fdt_size and fdt_size_allocate is the appropriate one to pass to the call? In the end I didn't get a good answer so oh I guess this is as good as the other way around. Bug looks real to me and this fixes it I think. Give I know this code very little take this tag with a pinch of salt. Reviewed-by: Jonathan Cameron > } > > if (fdt_addr) { > @@ -334,7 +336,7 @@ efi_status_t allocate_new_fdt_and_exit_boot(void *handle, > efi_free(MAX_FDT_SIZE, *new_fdt_addr); > > fail: > - efi_free(fdt_size, fdt_addr); > + efi_free(fdt_size_allocated, fdt_addr); > if (!efi_novamap) > efi_bs_call(free_pool, priv.runtime_map); >