From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailgw.kylinos.cn (mailgw.kylinos.cn [124.126.103.232]) (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 E5D4821CC44; Wed, 10 Dec 2025 06:09:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=124.126.103.232 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765346947; cv=none; b=MVqPjhNZCOiCyb5WFjcOWRcpXfU8uZBGrVdiaOXSMguDIp76LKi93Gftr7IeaPy2OYl5L0t2xP0nRUiC8izI7zcLOQfu41oQzZI9IwF1xjb+x83XKHl+0Tlc4Fy+0X/0FupojCLe89jzJGPV/S1MAYQR71dVXWyg3Wrf4sCLnow= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765346947; c=relaxed/simple; bh=vseF7ujM/iBxpCgZ/r+q5YLkXVzyTb8ndIAJNd5QafA=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=pYq22BPrKO4bVgCYml2se40VPrVL0RqrzW2RxTneWGejMZwpCW1pn4x3UJaYaWHgfBLjA+6AEFSxpO7wF7HO53kNbpl2UXD/ZhUQ+WulLZ2PnM3LBQePktjsFU1cm5LJ83soCbX4GO5Z5Q1f/FXaqBXiBzLfjexGpxVOWKdw3Fs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn; spf=pass smtp.mailfrom=kylinos.cn; arc=none smtp.client-ip=124.126.103.232 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kylinos.cn X-UUID: b321d1bcd58e11f0a38c85956e01ac42-20251210 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.3.6,REQID:4f777785-ed55-4ba9-8de3-a8f7a3a7aee6,IP:0,UR L:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION:r elease,TS:0 X-CID-META: VersionHash:a9d874c,CLOUDID:6009662373f6ac72260c8b7c16b4250b,BulkI D:nil,BulkQuantity:0,Recheck:0,SF:80|81|82|83|102|850|898,TC:nil,Content:0 |15|50,EDM:-3,IP:nil,URL:0,File:nil,RT:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,O SI:0,OSA:0,AV:0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 2,SSN|SDN X-CID-BAS: 2,SSN|SDN,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-CID-RHF: D41D8CD98F00B204E9800998ECF8427E X-UUID: b321d1bcd58e11f0a38c85956e01ac42-20251210 X-User: duanchenghao@kylinos.cn Received: from localhost [(10.44.16.150)] by mailgw.kylinos.cn (envelope-from ) (Generic MTA with TLSv1.3 TLS_AES_256_GCM_SHA384 256/256) with ESMTP id 1660171310; Wed, 10 Dec 2025 14:08:51 +0800 Date: Wed, 10 Dec 2025 14:08:49 +0800 From: Chenghao Duan To: Hengqi Chen Cc: yangtiezhu@loongson.cn, chenhuacai@kernel.org, kernel@xen0n.name, zhangtianyang@loongson.cn, masahiroy@kernel.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, bpf@vger.kernel.org, guodongtai@kylinos.cn, youling.tang@linux.dev, jianghaoran@kylinos.cn, vincent.mc.li@gmail.com Subject: Re: [PATCH v1 0/2] Fix the failure issue of the module_attach test case Message-ID: <20251210060849.GB691118@chenghao-pc> References: <20251209093405.1309253-1-duanchenghao@kylinos.cn> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Wed, Dec 10, 2025 at 12:10:46PM +0800, Hengqi Chen wrote: > One minor question, I wonder how you debug these issues ? > There were initially two issues: 1. When monitoring the function addresses of kernel modules in the module_attach test case, kernel panic would occur. 2. Illegal address access in the module_attach and subprogs_extable test cases would lead to kernel panic. These two issues were debugged by combining different methods for different scenarios, including gdb, kgdb, embedding break instructions in assembly code, and printing stack and register data. Chenghao > On Tue, Dec 9, 2025 at 5:34 PM Chenghao Duan wrote: > > > > The following test cases under the tools/testing/selftests/bpf/ > > directory have passed the test： > > > > ./test_progs -t module_attach > > ./test_progs -t module_fentry_shadow > > ./test_progs -t subprogs > > ./test_progs -t subprogs_extable > > ./test_progs -t tailcalls > > ./test_progs -t struct_ops -d struct_ops_multi_pages > > ./test_progs -t fexit_bpf2bpf > > ./test_progs -t fexit_stress > > ./test_progs -t module_fentry_shadow > > ./test_progs -t fentry_test/fentry > > ./test_progs -t fexit_test/fexit > > ./test_progs -t fentry_fexit > > ./test_progs -t modify_return > > ./test_progs -t fexit_sleep > > ./test_progs -t test_overhead > > ./test_progs -t trampoline_count > > > > Chenghao Duan (2): > > LoongArch: Modify the jump logic of the trampoline > > LoongArch: BPF: Enable BPF exception fixup for specific ADE subcode > > > > arch/loongarch/kernel/mcount_dyn.S | 14 +++++--- > > arch/loongarch/kernel/traps.c | 7 +++- > > arch/loongarch/net/bpf_jit.c | 37 +++++++++++++++------ > > samples/ftrace/ftrace-direct-modify.c | 8 ++--- > > samples/ftrace/ftrace-direct-multi-modify.c | 8 ++--- > > samples/ftrace/ftrace-direct-multi.c | 4 +-- > > samples/ftrace/ftrace-direct-too.c | 4 +-- > > samples/ftrace/ftrace-direct.c | 4 +-- > > 8 files changed, 56 insertions(+), 30 deletions(-) > > > > -- > > 2.25.1 > >