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 9EB763E40F5; Thu, 17 Sep 2026 17:22:30 +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=1789665751; cv=none; b=ROyDwdS9QpXBzRjNHRDbqcRtZKqbNmF9gAQni+OiTWi1k4IRkoWeAkM4PuJHC6j9ennS1qcFZFVlAGxwBvUeLmOeEE/SHiCp+kpZNI4K8wHLQu500kKV79fRRtixFmwTpDCopGR74y6DcRzz2ViL47wTa8bO1uxClke1vtdSCpw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789665751; c=relaxed/simple; bh=jfZMcG/JAbB1r9Yo3YwHprOhuFup8RH24uJeto7L4A8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=CGns0h9BTCgmib6DuI8PEY/O2BPcVhGxmv5533pK5H8X3hyNHmjMLw3gbBL6O3E5OupOqBsqU0YIH1ncAM97WVjp4GwKxdDU8Yx0haUff2KVHLKXbcsZS0j9t6WhF66MMfwKAHlzPsskm1rEpKWmKixYkY1imUcLokhs59o1A9o= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=YhmubZZf; 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="YhmubZZf" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BA99F1F000FF; Thu, 17 Sep 2026 17:22:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789665750; bh=ePxmcsq16/bFj+HPRxPAuykJyv39adzNderJ7w6js1k=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=YhmubZZf1zCrS+T9JM3+C4jhEcdQDon7XxC45c41MOAIsdr+1/wq+o4HSfUNfsx6n ctd+a5lxkDVLabUTteEGvRjhM4K15YHdCpapmEDqD2cWr4nSJLJvNP1vroeuq6JeOP kskCFJYOTTfCrlVzucPoVSHI3ZGGZBPXufFK9quU= 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 6.18 0807/1250] powerpc/kexec_file: Use inclusive range checks in add_usable_mem() Date: Thu, 17 Sep 2026 16:10:02 +0100 Message-ID: <20260917151613.787494541@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260917151551.901433442@linuxfoundation.org> References: <20260917151551.901433442@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 6.18-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 6075b1c88511a..c2ed0d1c92e75 100644 --- a/arch/powerpc/kexec/file_load_64.c +++ b/arch/powerpc/kexec/file_load_64.c @@ -113,7 +113,7 @@ 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