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 4261C2522A8; Tue, 20 May 2025 14:11:37 +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=1747750297; cv=none; b=YpbiTyTQQaER9gI7ncU5xw2bKAgbsmAW+82DbE+CIOS8Tt5w2LKs0Esrzw/BAewLEjdrFCre+uLs/XjXKPek4gpc215xv6UFYdTuKt7LMOv3xCwng8cti0PJmXlcW+abbez5/KjOStWKUUgY0UvBpjA7ci2a0b2C7uv9sDimYSY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747750297; c=relaxed/simple; bh=yh/KUYDh3msUwcpD4zSzQahU4FCJtnWG8QYcg/Qfssw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=F9YU2jms12pVa4MZnrsTgkBdShiP91CtBNV+r391BssZEKYcSoAy7mT8d34+DlFqXLfyZFDoBVWuaC2jTGwW8sKEq81NYedIiP7jMbNRQX4M3MxjjRSX51P1ZH40mZVEYK+pC3KosyLKe/LUpaUu2hU4gyQS5eBuBfVIKmktaiY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=vanFL54A; 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="vanFL54A" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EF746C4CEE9; Tue, 20 May 2025 14:11:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1747750297; bh=yh/KUYDh3msUwcpD4zSzQahU4FCJtnWG8QYcg/Qfssw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vanFL54AsjgpagemeAFubmBBnghRxMd9WBLeRAM7cJj1C+PAHws3wm7c5BipUw3K0 z/X2gto4eQ8hePZO6p1inGnzsQGKHCxbKS66AwOlgIPB4rTPtCTXk6+DBGGuT6O6XP 984J9Z0LJ9wotEPlWERvmIWW7CbWIBN5W3EWvYbE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Huacai Chen Subject: [PATCH 6.12 076/143] LoongArch: Fix MAX_REG_OFFSET calculation Date: Tue, 20 May 2025 15:50:31 +0200 Message-ID: <20250520125813.056337045@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250520125810.036375422@linuxfoundation.org> References: <20250520125810.036375422@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 6.12-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 @@ -55,7 +55,7 @@ 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