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 10:53:41 +0100 |
| commit | 08283b076f4e889df3e46849bcdf3d388c2d6257 (patch) | |
| tree | d812e525d37e12572ac096342d59f3a91d276f84 /fs/f2fs | |
| parent | 57cfc965e3754868b0686d2700d9ea869dee48ea (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 72f227f6ebad..6b240b71d2e8 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -998,6 +998,9 @@ 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); |