Added a check to the compression_unit so that out of bound doesn't occur. Fix patching issues in version 2. Signed-off-by: Manas Ghandat <ghandatmanas@xxxxxxxxx> Reported-by: syzbot+4768a8f039aa677897d0@xxxxxxxxxxxxxxxxxxxxxxxxx Closes: https://syzkaller.appspot.com/bug?extid=4768a8f039aa677897d0 --- fs/ntfs/inode.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c index 6c3f38d66579..a657322874ed 100644 --- a/fs/ntfs/inode.c +++ b/fs/ntfs/inode.c @@ -1077,6 +1077,15 @@ static int ntfs_read_locked_inode(struct inode *vi) goto unm_err_out; } if (a->data.non_resident.compression_unit) { + if (a->data.non_resident.compression_unit + + vol->cluster_size_bits > 32) { + ntfs_error(vi->i_sb, + "Found non-standard compression unit (%u). Cannot handle this.", + a->data.non_resident.compression_unit + ); + err = -EOPNOTSUPP; + goto unm_err_out; + } ni->itype.compressed.block_size = 1U << (a->data.non_resident. compression_unit + -- 2.37.2
