diff options
| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2021-08-30 13:30:45 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-09-18 13:43:34 +0200 |
| commit | 8c66f86b421c36b6d031b5261939ca3ee94b89a0 (patch) | |
| tree | f17b8fc2b79884e564d26ac08128d4fa3de256e5 /fs/f2fs | |
| parent | 957c40ec56c83df1e92c29e516eb6f8823bb1cb7 (diff) | |
f2fs: should put a page beyond EOF when preparing a write
[ Upstream commit 9605f75cf36e0bcc0f4ada07b5be712d30107607 ]
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: a949dc5f2c5c ("f2fs: compress: fix race condition of overwrite vs truncate")
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/data.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index f2498e4ad89d..a86f004c0c07 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -2153,6 +2153,8 @@ 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--; } |