From: Gao Xiang <gaoxiang25@xxxxxxxxxx>
commit 3407a4198faf01c9d7596c45b8606834b8dfc2b7 upstream.
As reported by erofs-utils fuzzer, unsupported compressed
clustersize will make fill_inode_lazy fail, for such case
we cannot set EROFS_V_Z_INITED_BIT since we need return
failure for each z_erofs_map_blocks_iter().
Fixes: 152a333a5895 ("staging: erofs: add compacted compression indexes support")
Cc: <stable@xxxxxxxxxxxxxxx> # 5.3+
Signed-off-by: Gao Xiang <gaoxiang25@xxxxxxxxxx>
Reviewed-by: Chao Yu <yuchao0@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20190819103426.87579-3-gaoxiang25@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/erofs/zmap.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/drivers/staging/erofs/zmap.c
+++ b/drivers/staging/erofs/zmap.c
@@ -86,12 +86,11 @@ static int fill_inode_lazy(struct inode
vi->z_physical_clusterbits[1] = vi->z_logical_clusterbits +
((h->h_clusterbits >> 5) & 7);
+ set_bit(EROFS_V_Z_INITED_BIT, &vi->flags);
unmap_done:
kunmap_atomic(kaddr);
unlock_page(page);
put_page(page);
-
- set_bit(EROFS_V_Z_INITED_BIT, &vi->flags);
out_unlock:
clear_and_wake_up_bit(EROFS_V_BL_Z_BIT, &vi->flags);
return err;
