From: Chao Yu <chao@kernel.org> mainline inclusion from mainline-v5.16-rc1 commit 77900c45ee5cd5da63bd4d818a41dbdf367e81cd category: bugfix bugzilla: 186264,https://gitee.com/openeuler/kernel/issues/I4VCWN CVE: CVE-2021-44879 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... -------------------------------- 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: Guo Xuenan <guoxuenan@huawei.com> Reviewed-by: Xiu Jianfeng <xiujianfeng@huawei.com> Reviewed-by: fang wei <fangwei1@huawei.com> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> --- fs/f2fs/gc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index 1e7e98dddb07..6153b29de331 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); -- 2.20.1