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| author | Chao Yu <chao@kernel.org> | 2021-12-06 22:44:21 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2021-12-10 15:48:33 -0800 |
| commit | 77900c45ee5cd5da63bd4d818a41dbdf367e81cd (patch) | |
| tree | 48ea8d06618ffb54b87dd5b02407ccc258d04bbb /fs/f2fs | |
| parent | f6db43076d190d9bf75559dec28e18b9d12e4ce5 (diff) | |
| download | lwn-77900c45ee5cd5da63bd4d818a41dbdf367e81cd.tar.gz lwn-77900c45ee5cd5da63bd4d818a41dbdf367e81cd.zip | |
f2fs: fix to do sanity check in is_alive()
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>
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 3e64b234df21..b538cbcba351 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -1026,6 +1026,9 @@ 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); |