diff options
| author | Steve French <stfrench@microsoft.com> | 2021-07-06 21:27:26 -0500 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2021-07-07 11:52:53 -0500 |
| commit | e3973ea3a7c218c1e92bdbfe1da934ef69d7a4ed (patch) | |
| tree | 3128353a613e1b3a708757ca6ad8ea3b1f275bed | |
| parent | 90810c25cf028bbd7e8abd9903c37610ef7072c7 (diff) | |
CIFS: Clarify SMB1 code for SetFileSize
Coverity also complains about the way we calculate the offset
(starting from the address of a 4 byte array within the header
structure rather than from the beginning of the struct plus
4 bytes) for setting the file size using SMB1. This changeset
doesn't change the address but makes it slightly clearer.
Addresses-Coverity: 711525 ("Out of bounds write")
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
| -rw-r--r-- | fs/cifs/cifssmb.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index 22b8c12962fa..a513a89aad1a 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -5628,9 +5628,9 @@ CIFSSMBSetFileSize(const unsigned int xid, struct cifs_tcon *tcon, pSMB->TotalDataCount = pSMB->DataCount; pSMB->TotalParameterCount = pSMB->ParameterCount; pSMB->ParameterOffset = cpu_to_le16(param_offset); + /* SMB offsets are from the beginning of SMB which is 4 bytes in, after RFC1001 field */ parm_data = - (struct file_end_of_file_info *) (((char *) &pSMB->hdr.Protocol) - + offset); + (struct file_end_of_file_info *)(((char *)pSMB) + offset + 4); pSMB->DataOffset = cpu_to_le16(offset); parm_data->FileSize = cpu_to_le64(size); pSMB->Fid = cfile->fid.netfid; |