From: Chao Yu chao@kernel.org
If __write_node_folio() failed, it will return AOP_WRITEPAGE_ACTIVATE, the incorrect return value may be passed to userspace in below path, fix it.
- sync_filesystem - sync_fs - f2fs_issue_checkpoint - block_operations - f2fs_sync_node_pages - __write_node_folio : return AOP_WRITEPAGE_ACTIVATE
Cc: stable@vger.kernel.org Reported-by: Christoph Hellwig hch@lst.de Signed-off-by: Chao Yu chao@kernel.org --- fs/f2fs/node.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index ec74eb9982a5..69308523c34e 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -2092,10 +2092,14 @@ int f2fs_sync_node_pages(struct f2fs_sb_info *sbi,
ret = __write_node_folio(folio, false, &submitted, wbc, do_balance, io_type, NULL); - if (ret) + if (ret) { folio_unlock(folio); - else if (submitted) + folio_batch_release(&fbatch); + ret = -EIO; + goto out; + } else if (submitted) { nwritten++; + }
if (--wbc->nr_to_write == 0) break;