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From: Gao Xiang via Linux-erofs <linux-erofs@lists.ozlabs.org>
To: linux-erofs@lists.ozlabs.org
Cc: Zhang Shiming <zhangshiming@oppo.com>, Guo Weichao <guoweichao@oppo.com>
Subject: [WIP] [PATCH 07/12] erofs-utils: fuse: refuse a undefined shifted cluster behavior
Date: Sat, 17 Oct 2020 13:16:16 +0800
Message-ID: <20201017051621.7810-8-hsiangkao@aol.com> (raw)
In-Reply-To: <20201017051621.7810-1-hsiangkao@aol.com>

[ let's fold in to the original patch. ]
Cc: Huang Jianan <huangjianan@oppo.com>
Signed-off-by: Gao Xiang <hsiangkao@aol.com>
---
 fuse/decompress.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fuse/decompress.c b/fuse/decompress.c
index 4b7cf3211319..4a9f8e7995c1 100644
--- a/fuse/decompress.c
+++ b/fuse/decompress.c
@@ -18,8 +18,11 @@ static int z_erofs_shifted_transform(struct z_erofs_decompress_req *rq)
 	char *dest = rq->out;
 	char *src = rq->in + rq->ofs_head;
 
-	memcpy(dest, src, rq->outputsize - rq->ofs_head);
+	if (rq->inputsize != EROFS_BLKSIZ)
+		return -EFSCORRUPTED;
 
+	DBG_BUGON(rq->outputsize > EROFS_BLKSIZ);
+	memcpy(dest, src, rq->outputsize - rq->ofs_head);
 	return 0;
 }
 
-- 
2.24.0


  parent reply index

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20201017051621.7810-1-hsiangkao.ref@aol.com>
2020-10-17  5:16 ` [WIP] [PATCH 00/12] erofs-utils: introduce fuse implementation Gao Xiang via Linux-erofs
2020-10-17  5:16   ` [WIP] [PATCH 01/12] " Gao Xiang via Linux-erofs
2020-10-17  5:16   ` [WIP] [PATCH 02/12] erofs-utils: fuse: support read special file Gao Xiang via Linux-erofs
2020-10-17  5:16   ` [WIP] [PATCH 03/12] erofs-utils: fuse: support read compressed file Gao Xiang via Linux-erofs
2020-10-17  5:16   ` [WIP] [PATCH 04/12] erofs-utils: fuse: adjust larger extent handling Gao Xiang via Linux-erofs
2020-10-19  3:13     ` 回复: " huangjianan
2020-10-19  3:32       ` Gao Xiang via Linux-erofs
2020-10-19  4:49         ` 回复: " Huang Jianan
2020-10-19  3:37     ` 回复: " Huang Jianan
2020-10-19  3:43       ` Gao Xiang via Linux-erofs
2020-10-17  5:16   ` [WIP] [PATCH 05/12] erofs-utils: fuse: use proper expression about inode size Gao Xiang via Linux-erofs
2020-10-17  5:16   ` [WIP] [PATCH 06/12] erofs-utils: fuse: drop ofs_out Gao Xiang via Linux-erofs
2020-10-17  5:16   ` Gao Xiang via Linux-erofs [this message]
2020-10-17  5:16   ` [WIP] [PATCH 08/12] erofs-utils: fuse: drop z_erofs_shifted_transform() Gao Xiang via Linux-erofs
2020-10-17  5:16   ` [WIP] [PATCH 09/12] erofs-utils: fuse: rename ofs_head and outputsize Gao Xiang via Linux-erofs
2020-10-17  5:16   ` [WIP] [PATCH 10/12] erofs-utils: fuse: cleanup erofs_read_data_compression() Gao Xiang via Linux-erofs
2020-10-17  5:16   ` [WIP] [PATCH 11/12] erofs-utils: fuse: move up mpage in struct erofs_map_blocks Gao Xiang via Linux-erofs
2020-10-17  5:16   ` [WIP] [PATCH 12/12] erofs-utils: fuse: fix up source headers Gao Xiang via Linux-erofs

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