Before call this path, sbi->used.bitmap.sb has not been initialized in ntfs_fill_super. #syz test diff --git a/fs/ntfs3/run.c b/fs/ntfs3/run.c index cb8cf0161177..8970101147c7 100644 --- a/fs/ntfs3/run.c +++ b/fs/ntfs3/run.c @@ -1057,11 +1057,14 @@ int run_unpack_ex(struct runs_tree *run, struct ntfs_sb_info *sbi, CLST ino, bool ok; struct wnd_bitmap *wnd; + if (!sbi->used.bitmap.sb) + return -EINVAL; + ret = run_unpack(run, sbi, ino, svcn, evcn, vcn, run_buf, run_buf_size); if (ret <= 0) return ret; - if (!sbi->used.bitmap.sb || !run || run == RUN_DEALLOCATE) + if (!run || run == RUN_DEALLOCATE) return ret; if (ino == MFT_REC_BADCLUST)
