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: # 4.19+
Signed-off-by: Gao Xiang
---
drivers/staging/erofs/zdata.c | 6 --
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/erofs/zdata.c b/drivers/staging/erofs/zdata.c
index 87b0c96caf8f..23283c97fd3b 100644
--- a/drivers/staging/erofs/zdata.c
+++ b/drivers/staging/erofs/zdata.c
@@ -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;
--
2.17.1
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