Commit 9605f75c authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: should put a page beyond EOF when preparing a write 



The prepare_compress_overwrite() gets/locks a page to prepare a read, and calls
f2fs_read_multi_pages() which checks EOF first. If there's any page beyond EOF,
we unlock the page and set cc->rpages[i] = NULL, which we can't put the page
anymore. This makes page leak, so let's fix by putting that page.

Fixes: a949dc5f ("f2fs: compress: fix race condition of overwrite vs truncate")
Reviewed-by: default avatarChao Yu <chao@kernel.org>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 827f0284

fs/f2fs/data.c

+2 −0
Original line number Diff line number Diff line
@@ -2183,6 +2183,8 @@ int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret, 
			continue;

		}

		unlock_page(page);

		if (for_write)

			put_page(page);

		cc->rpages[i] = NULL;

		cc->nr_rpages--;

	}