From: Konstantin Komarov <almaz.alexandrovich@paragon-software.com> mainline inclusion from mainline-v5.15 commit 09f7c338da7818fd33af401d855b895550e7c170 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I4G67J?from=project-issue CVE: NA ---------------------------------------------------------------------- If we continue to work in this case, then we can corrupt fs. Fixes: 82cae269cfa9 ("fs/ntfs3: Add initialization of super block"). Reviewed-by: Kari Argillander <kari.argillander@gmail.com> Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com> Signed-off-by: Yin Xiujiang <yinxiujiang@kylinos.cn> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> Acked-by: Hou Tao <houtao1@huawei.com> Acked-by: Xie XiuQi <xiexiuqi@huawei.com> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> --- fs/ntfs3/super.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c index 800897777eb0..e9b6a3734576 100644 --- a/fs/ntfs3/super.c +++ b/fs/ntfs3/super.c @@ -763,9 +763,20 @@ static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size, sbi->mft.lbo = mlcn << sbi->cluster_bits; sbi->mft.lbo2 = mlcn2 << sbi->cluster_bits; - if (sbi->cluster_size < sbi->sector_size) + /* Compare boot's cluster and sector. */ + if (sbi->cluster_size < boot_sector_size) goto out; + /* Compare boot's cluster and media sector. */ + if (sbi->cluster_size < sector_size) { + /* No way to use ntfs_get_block in this case. */ + ntfs_err( + sb, + "Failed to mount 'cause NTFS's cluster size (%u) is less than media sector size (%u)", + sbi->cluster_size, sector_size); + goto out; + } + sbi->cluster_mask = sbi->cluster_size - 1; sbi->cluster_mask_inv = ~(u64)sbi->cluster_mask; sbi->record_size = record_size = boot->record_size < 0 -- 2.20.1