Re: [ocfs2?] kernel BUG in ocfs2_truncate_inline

[Edward Adam Davis]

offset or offset + len greater than UINT_MAX, if true, it will overflow in ocfs2_truncate_inline

#syz test

diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index ad131a2fc58e..05d6a8acfcda 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1784,6 +1784,11 @@ int ocfs2_remove_inode_range(struct inode *inode,
 		return 0;
 
 	if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
+		if (byte_start > UINT_MAX || byte_start + byte_len > UINT_MAX) {
+			ret = -EFBIG;
+			mlog_errno(ret);
+			goto out;
+		}
 		ret = ocfs2_truncate_inline(inode, di_bh, byte_start,
 					    byte_start + byte_len, 0);
 		if (ret) {