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 74DCE3D45CF; Wed, 30 Sep 2026 19:07:42 +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=1790795263; cv=none; b=HBqRZaG5V9tZ8Z0qJoHxUJDWzC6yXHQz8A7SaCstacePl3ABDNqktFmeWBjAtwpI+In4TxxheccPV413PckS9XT0arSJG7ff4ueyhBZXlJFRjAlE9NZqS2VjJRQc0WpGVuVkjA4Axzzu++qnRxIZ1Zc/8fggBoau0C2mCP8BCZE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790795263; c=relaxed/simple; bh=8m5doOrlSOTfpluhcTL4kJrOGso5dqV+/UhUxiDiCs4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=OLXH1fKgQzmXVE2Z864kjnxv0bp56xcXslkXFGbY1NI+X0Ayl0tjSBJJMTl/njddUjZSQ4ASAQjyv4EtPSuIQ9ZsZ36orQrw7g+BtcfgcLNPHyptPo+NvJcdoStzJUyadn1JTInm3Z8bKTh4EZK2E7i+wZlLx25qB/itVFOGuc0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=WwUtlciR; 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="WwUtlciR" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D08331F000FF; Wed, 30 Sep 2026 19:07:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790795262; bh=MwaLM4a5MIErwgu2IkSF6+uSo9TNZhaoKQ7fRfzLz0k=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=WwUtlciRcDUQnaL1YnqP1uhfH3SJzBtHBjkJBq7F+zPjbl3e1nAejELZBPy8jzcUQ Lh2x7z+mDC+vd31q6X36yKBHwqJI/lDSh4M+/DMfud0B/aSuFOEdTZWDp8pbeXDpzm h3E80oVilVfdgb5nhgZP/GvnMxAGxC76Vc0FkHzs= 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 6.6 0499/1193] powerpc/kexec_file: Use inclusive range checks in add_usable_mem() Date: Wed, 30 Sep 2026 17:19:43 +0200 Message-ID: <20260930152445.241148157@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930152434.301151190@linuxfoundation.org> References: <20260930152434.301151190@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 6.6-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 12cbfc9fce451..a0972debb875a 100644 --- a/arch/powerpc/kexec/file_load_64.c +++ b/arch/powerpc/kexec/file_load_64.c @@ -483,7 +483,7 @@ 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