If an NTFS file system is mounted to another system with different PAGE_SIZE from the original system, log->page_size will change in log_replay(), but log->page_{mask,bits} don't change correspondingly. This will cause a panic because "u32 bytes = log->page_size - page_off" will get a negative value in the later read_log_page().
Cc: stable@vger.kernel.org Fixes: b46acd6a6a627d876898e ("fs/ntfs3: Add NTFS journal") Signed-off-by: Huacai Chen chenhuacai@loongson.cn --- fs/ntfs3/fslog.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/fs/ntfs3/fslog.c b/fs/ntfs3/fslog.c index 855519713bf7..19c448093df7 100644 --- a/fs/ntfs3/fslog.c +++ b/fs/ntfs3/fslog.c @@ -3914,6 +3914,9 @@ int log_replay(struct ntfs_inode *ni, bool *initialized) goto out; }
+ log->page_mask = log->page_size - 1; + log->page_bits = blksize_bits(log->page_size); + /* If the file size has shrunk then we won't mount it. */ if (log->l_size < le64_to_cpu(ra2->l_size)) { err = -EINVAL;