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staging: erofs: add two missing erofs_workgroup_put for corrupted images

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As reported by erofs-utils fuzzer, these error handling
path will be entered to handle corrupted images.

Lack of erofs_workgroup_puts will cause unmounting
unsuccessfully.

Fix these return values to EFSCORRUPTED as well.

Fixes: 3883a79abd02 ("staging: erofs: introduce VLE decompression support")
Cc: <stable@vger.kernel.org> # 4.19+
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Link: https://lore.kernel.org/r/20190819103426.87579-4-gaoxiang25@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gao Xiang 2019-08-19 18:34:23 +08:00 committed by Greg Kroah-Hartman
parent 3407a4198f
commit 138e1a0990
1 changed files with 4 additions and 2 deletions
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6
drivers/staging/erofs/zdata.c
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@ -357,14 +357,16 @@ static struct z_erofs_collection *cllookup(struct z_erofs_collector *clt,
cl = z_erofs_primarycollection(pcl);
if (unlikely(cl->pageofs != (map->m_la & ~PAGE_MASK))) {
DBG_BUGON(1);
return ERR_PTR(-EIO);
erofs_workgroup_put(grp);
return ERR_PTR(-EFSCORRUPTED);
}
length = READ_ONCE(pcl->length);
if (length & Z_EROFS_PCLUSTER_FULL_LENGTH) {
if ((map->m_llen << Z_EROFS_PCLUSTER_LENGTH_BIT) > length) {
DBG_BUGON(1);
return ERR_PTR(-EIO);
erofs_workgroup_put(grp);
return ERR_PTR(-EFSCORRUPTED);
}
} else {
unsigned int llen = map->m_llen << Z_EROFS_PCLUSTER_LENGTH_BIT;