linux-kernel - [PATCH v2 1/3] mtd: partitions: ofpart: skip subnodes parse with compatible

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20210216212638.28382-2-ansuelsmth@gmail.com>
Date:   Tue, 16 Feb 2021 22:26:26 +0100
From:   Ansuel Smith <ansuelsmth@...il.com>
To:     Richard Weinberger <richard@....at>
Cc:     Ansuel Smith <ansuelsmth@...il.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Boris Brezillon <bbrezillon@...nel.org>,
        linux-mtd@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/3] mtd: partitions: ofpart: skip subnodes parse with compatible

If a partitions structure is not used, parse direct subnodes as
fixed-partitions only if a compatible is not found or is of type
fixed-partition. A parser can be used directly on the subnode and
subnodes should not be parsed as fixed-partitions by default.

Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
---
 drivers/mtd/parsers/ofpart.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/mtd/parsers/ofpart.c b/drivers/mtd/parsers/ofpart.c
index daf507c123e6..4b363dd0311c 100644
--- a/drivers/mtd/parsers/ofpart.c
+++ b/drivers/mtd/parsers/ofpart.c
@@ -50,6 +50,11 @@ static int parse_fixed_partitions(struct mtd_info *master,
 			 master->name, mtd_node);
 		ofpart_node = mtd_node;
 		dedicated = false;
+
+		/* Skip parsing direct subnodes if a compatible is found and is not fixed-partitions */
+		if (node_has_compatible(ofpart_node) &&
+		    !of_device_is_compatible(ofpart_node, "fixed-partitions"))
+			return 0;
 	} else if (!of_device_is_compatible(ofpart_node, "fixed-partitions")) {
 		/* The 'partitions' subnode might be used by another parser */
 		return 0;
-- 
2.30.0