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 266A62D9484; Wed, 30 Sep 2026 18:04:23 +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=1790791464; cv=none; b=lSdgPgp1mH05/8isgwSbK13H9UCZdvrYFHIdFHLA5R9B2IW3ZvOyjOnJEbTJloiRmENgom+2/MJQpCtn1XGrwVMAGxDphEq7QzdPFYCPMfT9cmkgRELhb3oNtfOsy3BAR9VpX4TVeZeq0i0YsY+y/2ZG/skUDG3gmcj6Q5AhIk0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790791464; c=relaxed/simple; bh=4lJewGr7xdFJ8HMQlT2acYnFw9Gk+f+b2luy03nQaCs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=KCUcNrjqfVp4zViCOToeLrRDdhU7hDYexnGBT7HrQM13Dw3wQiHdy09P2/HEFcEZQJg3TjC8MhGn8RZzzGQjnvmAmQS0j/Biq0CkpkPREFTcEMduJcMHrIrB95galvIuajcdEBYQtqkMxX2R79mi+xaaP75SH1b+5QNjUWgGYZ4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=CvCcocxA; 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="CvCcocxA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 80E011F000FF; Wed, 30 Sep 2026 18:04:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790791463; bh=7Zpmo+kHh/gw1s+d7RG/md8aaqW6UA5k9/Fs6+MIlEM=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=CvCcocxAgbiCyGzf97MiBy7BYtzDPYjC9LK1aGOm7IDXTqT7vxGCctfS/hGxP2/Iu Grib5nTAssCJUtnmxMj6+5PIn+aAoxYJ/AJwIdx9yNQft9asBDjo8dTqA2ByafZ71Y DBqewtLjI+Pdty6KJQ0LPyJLwhM45OcOt0c1HD00= 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 5.15 309/752] powerpc/kexec_file: Use inclusive range checks in add_usable_mem() Date: Wed, 30 Sep 2026 17:22:59 +0200 Message-ID: <20260930152404.981509899@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930152358.131179731@linuxfoundation.org> References: <20260930152358.131179731@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 5.15-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 ac8160cbcf673..e1af6f2073829 100644 --- a/arch/powerpc/kexec/file_load_64.c +++ b/arch/powerpc/kexec/file_load_64.c @@ -478,7 +478,7 @@ 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