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path: root/fs/smb/server/smb2misc.c
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Diffstat (limited to 'fs/smb/server/smb2misc.c')
-rw-r--r--fs/smb/server/smb2misc.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/fs/smb/server/smb2misc.c b/fs/smb/server/smb2misc.c
index 23bd3d1209df..03dded29a980 100644
--- a/fs/smb/server/smb2misc.c
+++ b/fs/smb/server/smb2misc.c
@@ -106,16 +106,25 @@ static int smb2_get_data_area_len(unsigned int *off, unsigned int *len,
break;
case SMB2_CREATE:
{
+ unsigned short int name_off =
+ le16_to_cpu(((struct smb2_create_req *)hdr)->NameOffset);
+ unsigned short int name_len =
+ le16_to_cpu(((struct smb2_create_req *)hdr)->NameLength);
+
if (((struct smb2_create_req *)hdr)->CreateContextsLength) {
*off = le32_to_cpu(((struct smb2_create_req *)
hdr)->CreateContextsOffset);
*len = le32_to_cpu(((struct smb2_create_req *)
hdr)->CreateContextsLength);
- break;
+ if (!name_len)
+ break;
+
+ if (name_off + name_len < (u64)*off + *len)
+ break;
}
- *off = le16_to_cpu(((struct smb2_create_req *)hdr)->NameOffset);
- *len = le16_to_cpu(((struct smb2_create_req *)hdr)->NameLength);
+ *off = name_off;
+ *len = name_len;
break;
}
case SMB2_QUERY_INFO: