linux

iv/linux

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Gao Xiang aa99a76b40 erofs: handle corrupted images whose decompressed size less than it'd be

As Lasse pointed out, "Looking at fs/erofs/decompress.c,
the return value from LZ4_decompress_safe_partial is only
checked for negative value to catch errors. ... So if
I understood it correctly, if there is bad data whose
uncompressed size is much less than it should be, it can
leave part of the output buffer untouched and expose the
previous data as the file content. "

Let's fix it now.

Cc: Lasse Collin <lasse.collin@tukaani.org>
Fixes: 7fc45dbc938a ("staging: erofs: introduce generic decompression backend")
[ Gao Xiang: v5.3+, I will manually backport this to stable later. ]
Link: https://lore.kernel.org/r/20200226081008.86348-3-gaoxiang25@huawei.com
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>

2020-03-03 23:40:52 +08:00

compress.h

…

data.c

erofs: fix erofs_get_meta_page locking due to a cleanup

2019-10-01 04:54:33 +08:00

decompressor.c

erofs: handle corrupted images whose decompressed size less than it'd be

2020-03-03 23:40:52 +08:00

dir.c

erofs: rename errln/infoln/debugln to erofs_{err, info, dbg}

2019-09-05 20:10:09 +02:00