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 C4E1549D584; Thu, 17 Sep 2026 18:43:44 +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=1789670625; cv=none; b=RDtV28Am3gLdFLOe8s4lazqTJA3wqoTFFL/BUOfYNyBcEnt7138xvRsuIp/qZFDK1prRLASlDmr1YVBBXaO8i3yPdAEuQjd9GQfrS1dJJNFy6fJrAI/dUwnXJz0+lgUVEp6lsXPgH3fUN1l1EI9EQNh7ZWiPH/D3uIlrO4AFxns= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789670625; c=relaxed/simple; bh=/T2pT2s3+/ESEDXf28Ybvac37VcLiMWwYEr76JSJBRI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=e6JKprukiQ6qTDio0DBVXpYVy5qlim1E3zfdFv8TmebUi/UNu2Qdr98iWpm+QsNcf044jJRoMVhuGw/gyCCJR4V7pVDJwJIgQDM/23uM6QA4vZRaQVencLUmEhpnhOSvpl6716JH+A6EPAYYfp6nKNS2ZTouusUwRsd4VybT3eY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=nRo+zNRA; 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="nRo+zNRA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 82A8D1F000FF; Thu, 17 Sep 2026 18:43:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789670624; bh=qOoVWMlcXa5APTqlO5JkSTd6EdICCi37ASmgYvQNlY4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=nRo+zNRAPmexhrA7pQrey3HWNY0U50bxoBRGBMmUeK9VVfDG7PBZt6i1oMIyW0Wlz KNdFC8TkM300m3Qecglou6g8R3+WN4kiRloZx8kjRDIiWgSr0DiUjjcRbtHvoY86oU SaYexHi7w4boa0XDmuAjT593YxQ7A8O4WctlbBAY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Thorsten Blum , Sourabh Jain , Madhavan Srinivasan , Sasha Levin Subject: [PATCH 6.12 0684/1102] powerpc/kexec_file: Use inclusive range checks in add_usable_mem() Date: Thu, 17 Sep 2026 16:10:27 +0100 Message-ID: <20260917151557.429144010@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260917151539.408551884@linuxfoundation.org> References: <20260917151539.408551884@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: Thorsten Blum [ Upstream commit c6755be4838d6ccd641effbcdc3d917b82631ff9 ] add_usable_mem() adds usable memory ranges for the kdump kernel. The ranges are inclusive, but the partial overlap check uses exclusive comparisons. This skips ranges with base == loc_end or end == loc_base. Use inclusive comparisons instead. Fixes: 7c64e21a1c5a ("powerpc/kexec_file: Restrict memory usage of kdump kernel") Signed-off-by: Thorsten Blum Reviewed-by: Sourabh Jain Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20260809162403.18142-2-thorsten.blum@linux.dev Signed-off-by: Sasha Levin --- arch/powerpc/kexec/file_load_64.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/kexec/file_load_64.c b/arch/powerpc/kexec/file_load_64.c index cb14de058de23..c1a56b6773ce1 100644 --- a/arch/powerpc/kexec/file_load_64.c +++ b/arch/powerpc/kexec/file_load_64.c @@ -296,7 +296,7 @@ static int add_usable_mem(struct umem_info *um_info, u64 base, u64 end) loc_end = um_info->ranges[i].end; if (loc_base >= base && loc_end <= end) add = true; - else if (base < loc_end && end > loc_base) { + else if (base <= loc_end && end >= loc_base) { if (loc_base < base) loc_base = base; if (loc_end > end) -- 2.53.0