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| author |   Steve French <stfrench@microsoft.com> | 2021-07-01 20:44:27 -0500 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2021-07-02 18:36:24 -0500 |
| commit | ded2d99cef169a12a1d3961a540728675f525846 (patch) | |
| tree | 5f9f436bc103fb953f0d9bdcce1393b09725f9c2 /fs/cifs | |
| parent | cifs: clarify SMB1 code for UnixCreateHardLink (diff) | |
| download | linux-dev-ded2d99cef169a12a1d3961a540728675f525846.tar.xz linux-dev-ded2d99cef169a12a1d3961a540728675f525846.zip | |
CIFS: Clarify SMB1 code for UnixCreateSymLink
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 creating SMB1 symlinks when using the Unix
extensions. This doesn't change the address but
makes it slightly clearer.
Addresses-Coverity: 711530 ("Out of bounds read")
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs')
| -rw-r--r-- | fs/cifs/cifssmb.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index ea12fa6eacb6..a14d3f533301 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -2925,7 +2925,8 @@ createSymLinkRetry: InformationLevel) - 4; offset = param_offset + params; - data_offset = (char *) (&pSMB->hdr.Protocol) + offset; + /* SMB offsets are from the beginning of SMB which is 4 bytes in, after RFC1001 field */ + data_offset = (char *)pSMB + offset + 4; if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { name_len_target = cifsConvertToUTF16((__le16 *) data_offset, toName, |