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 B53DE244196; Tue, 20 May 2025 13:57:05 +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=1747749425; cv=none; b=DUTeJjnYNq6vvuhPhOCmc9yXdD/4d5Tg71K9lYMEZuxoNThf0DBUeB3nV1D9RzxRByD2AXjOczVKUk08NAtG5Avsz9yb6FrT2h18VyXaJTMvfa0xUXvbDjBzNLfNQVE2crSjjZax0HP11fPlj+1rjZA6lOvzWLF8hCHNW9N0dB4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747749425; c=relaxed/simple; bh=/XxP9NvPsXi3TyG3PZPVHdSGhf/2cY2bKB/6xgN54ww=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=UCp5eQCZjoiK182cbV2zli/2v/B40fOCopcgze+VWCy/v7KC+QTgr4k8ebHSwhxj0YLajormVkdRxZwVQq5mwzDHGdF/4QUxFAmbtiCtMdCmxbfst8gsnNyefWr8AVpyMKNHyzb3ID6hfUZ8/ckw5ZPpLWJwpIJ+CzrJlvTzchA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Jnskb7kl; 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="Jnskb7kl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C17F5C4CEE9; Tue, 20 May 2025 13:57:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1747749425; bh=/XxP9NvPsXi3TyG3PZPVHdSGhf/2cY2bKB/6xgN54ww=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Jnskb7klH0Xt1NyU4SwVFFNYk9bkcNLaCeIat5z8INYEsf9ha+K1PjMOnmjE7kUoE Toys0+GJCpTzzvx6oJXfz2pMWcNNvdAsSoYnsi/fAAAj69chUdptMjiSUQQSiusYCH qn6iVFE3SdHWLblK7XzpAAFtYtwvyGpZTq53MANk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Huacai Chen Subject: [PATCH 6.1 41/97] LoongArch: Fix MAX_REG_OFFSET calculation Date: Tue, 20 May 2025 15:50:06 +0200 Message-ID: <20250520125802.269276363@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250520125800.653047540@linuxfoundation.org> References: <20250520125800.653047540@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Huacai Chen commit 90436d234230e9a950ccd87831108b688b27a234 upstream. Fix MAX_REG_OFFSET calculation, make it point to the last register in 'struct pt_regs' and not to the marker itself, which could allow regs_get_register() to return an invalid offset. Cc: stable@vger.kernel.org Fixes: 803b0fc5c3f2baa6e5 ("LoongArch: Add process management") Signed-off-by: Huacai Chen Signed-off-by: Greg Kroah-Hartman --- arch/loongarch/include/asm/ptrace.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/loongarch/include/asm/ptrace.h +++ b/arch/loongarch/include/asm/ptrace.h @@ -54,7 +54,7 @@ static inline void instruction_pointer_s /* Query offset/name of register from its name/offset */ extern int regs_query_register_offset(const char *name); -#define MAX_REG_OFFSET (offsetof(struct pt_regs, __last)) +#define MAX_REG_OFFSET (offsetof(struct pt_regs, __last) - sizeof(unsigned long)) /** * regs_get_register() - get register value from its offset