diff options
| author | Chao Yu <chao@kernel.org> | 2021-12-06 22:44:21 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-01-27 11:02:47 +0100 |
| commit | dd88a805d2d0ffc68b03302c9302e9d3d8d10172 (patch) | |
| tree | e740aa357e1411e3338e23288c8d7d45162bc5b0 /fs/f2fs | |
| parent | 0ddbdc0b7f0cec3815ac05a30b2c2f6457be3050 (diff) | |
f2fs: fix to do sanity check in is_alive()
commit 77900c45ee5cd5da63bd4d818a41dbdf367e81cd upstream.
In fuzzed image, SSA table may indicate that a data block belongs to
invalid node, which node ID is out-of-range (0, 1, 2 or max_nid), in
order to avoid migrating inconsistent data in such corrupted image,
let's do sanity check anyway before data block migration.
Cc: stable@vger.kernel.org
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/gc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index 452ddecf2c32..5a6352b741cd 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -1023,6 +1023,9 @@ static bool is_alive(struct f2fs_sb_info *sbi, struct f2fs_summary *sum, set_sbi_flag(sbi, SBI_NEED_FSCK); } + if (f2fs_check_nid_range(sbi, dni->ino)) + return false; + *nofs = ofs_of_node(node_page); source_blkaddr = data_blkaddr(NULL, node_page, ofs_in_node); f2fs_put_page(node_page, 1); |