From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 347CB390C9F; Thu, 30 Jul 2026 15:44:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785426279; cv=none; b=gmiUiWQ8BZeyTssls6ARt6Qaopj00S3oFHfA8S8WZLY9RTAf1rBq9bUusURxJvjWXI+YUxyYEpepVrh027KolwbyvFdo6ryBaIlpM7Gxi0cPwffOym3svX22sm21TmdESjfNGcgmJKRtgwkjYMy2rS4gqw8yZy3ZWHjxt0CB5rM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785426279; c=relaxed/simple; bh=1c37esh2yOpgvlZiKOdV6InZ/yTGWO/+jzGuviAcXHQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=BF4eMBlxBTBk7VqNpD7ng8q49MBtPbT9ssiWcnS/6KpwEmc3DbdhgGqB2oDt52yi++E209nGCjkvTWcC97+01chUN7vQE+Th/MekLrzwkQ/14NQSk6ABWVNzFXsz2UiTYiuHCzbLPN0GA97orGKOb3PuNC9wHxaB2ITHnzQiLU8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=S0fQxfaC; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="S0fQxfaC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8CE5C1F000E9; Thu, 30 Jul 2026 15:44:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1785426278; bh=391MhQ6tG99iRrmGtYhHir7OqS6vxcWZu8mDTUne8tY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=S0fQxfaCZbZO7gs8PgPZD+pXB1vwCe0exyQ+uPCjZ0df+4mh6d/5D4oIn2QYPr94g Jr4e+bwiVb53CTakANscrT4ByJvETtqa2Jk2kutJ7xcd8PfSp19NLU+1P7fX3/GFfi R+8qHESJXyEfwjFXoJ2J+ytHEzSlqJvYBMIm8HVI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Haoran Jiang , Huacai Chen Subject: [PATCH 6.12 362/602] LoongArch: Fix oops during single-step debugging Date: Thu, 30 Jul 2026 16:12:34 +0200 Message-ID: <20260730141443.567814919@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260730141435.976815864@linuxfoundation.org> References: <20260730141435.976815864@linuxfoundation.org> User-Agent: quilt/0.69 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 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Haoran Jiang commit 73555fdab5e1e4f24ca000c41a616b34edf4b55d upstream. When entering KDB via a breakpoint and then performing single-step debugging, an oops is triggered. Now during single-step debugging, kdb_local() expects the reason to be KDB_REASON_SSTEP, but it is actually KDB_REASON_OOPS. In kdb_stub(), when determining the reason, the ex_vector for single-step should be 0, as already implemented on other architectures such as arm64 and riscv. Before the patch: [112]kdb> ss Entering kdb (current=0x900020009f520000, pid 10661) on processor 112 Oops: (null) due to oops @ 0x90000000005b57a4 Cc: stable@vger.kernel.org Signed-off-by: Haoran Jiang Signed-off-by: Huacai Chen Signed-off-by: Greg Kroah-Hartman --- arch/loongarch/kernel/kgdb.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/arch/loongarch/kernel/kgdb.c +++ b/arch/loongarch/kernel/kgdb.c @@ -252,7 +252,8 @@ static int kgdb_loongarch_notify(struct if (atomic_read(&kgdb_active) != -1) kgdb_nmicallback(smp_processor_id(), regs); - if (kgdb_handle_exception(args->trapnr, args->signr, cmd, regs)) + if (kgdb_handle_exception(regs->csr_era == stepped_address ? 0 : args->trapnr, + args->signr, cmd, regs)) return NOTIFY_DONE; if (atomic_read(&kgdb_setting_breakpoint))