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authorSteve French <smfrench@gmail.com>2014-10-16 15:13:14 -0500
committerSteve French <smfrench@gmail.com>2014-10-16 15:20:20 -0500
commit9ffc5412964d5b276227684124efb702ec387c19 (patch)
treeef8faf651808d4d3ba4555ed8e04819c792bfa1a /fs
parentb5b374eab11ef60d789e28bc36c18e2d08703212 (diff)
Check minimum response length on query_network_interface
Acked-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com> Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/cifs/smb2ops.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index af446866cbe8..c5f521bcdee2 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -265,15 +265,18 @@ SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
NULL /* no data input */, 0 /* no data input */,
(char **)&out_buf, &ret_data_len);
-
- if ((rc == 0) && (ret_data_len > 0)) {
+ if (rc != 0)
+ cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
+ else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
+ cifs_dbg(VFS, "server returned bad net interface info buf\n");
+ rc = -EINVAL;
+ } else {
/* Dump info on first interface */
cifs_dbg(FYI, "Adapter Capability 0x%x\t",
le32_to_cpu(out_buf->Capability));
cifs_dbg(FYI, "Link Speed %lld\n",
le64_to_cpu(out_buf->LinkSpeed));
- } else
- cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
+ }
return rc;
}

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