diff options
Diffstat (limited to 'fs/smb/client/cifssmb.c')
| -rw-r--r-- | fs/smb/client/cifssmb.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/fs/smb/client/cifssmb.c b/fs/smb/client/cifssmb.c index e9e33b0b3..01e89070d 100644 --- a/fs/smb/client/cifssmb.c +++ b/fs/smb/client/cifssmb.c @@ -2700,11 +2700,12 @@ int cifs_query_reparse_point(const unsigned int xid, u32 *tag, struct kvec *rsp, int *rsp_buftype) { + struct reparse_data_buffer *buf; struct cifs_open_parms oparms; TRANSACT_IOCTL_REQ *io_req = NULL; TRANSACT_IOCTL_RSP *io_rsp = NULL; struct cifs_fid fid; - __u32 data_offset, data_count; + __u32 data_offset, data_count, len; __u8 *start, *end; int io_rsp_len; int oplock = 0; @@ -2774,7 +2775,16 @@ int cifs_query_reparse_point(const unsigned int xid, goto error; } - *tag = le32_to_cpu(((struct reparse_data_buffer *)start)->ReparseTag); + data_count = le16_to_cpu(io_rsp->ByteCount); + buf = (struct reparse_data_buffer *)start; + len = sizeof(*buf); + if (data_count < len || + data_count < le16_to_cpu(buf->ReparseDataLength) + len) { + rc = -EIO; + goto error; + } + + *tag = le32_to_cpu(buf->ReparseTag); rsp->iov_base = io_rsp; rsp->iov_len = io_rsp_len; *rsp_buftype = CIFS_LARGE_BUFFER; |