diff options
| author | Steve French <sfrench@us.ibm.com> | 2007-11-13 22:41:37 +0000 |
|---|---|---|
| committer | Steve French <sfrench@us.ibm.com> | 2007-11-13 22:41:37 +0000 |
| commit | 133672efbc1085f9af990bdc145e1822ea93bcf3 (patch) | |
| tree | b93b5ba3a9559d137fe7fb86f6d1a3d33189ce0b /fs/cifs/cifsglob.h | |
| parent | 9418d5dc9ba40b88737580457bf3b7c63c60ec43 (diff) | |
[CIFS] Fix buffer overflow if server sends corrupt response to small
request
In SendReceive() function in transport.c - it memcpy's
message payload into a buffer passed via out_buf param. The function
assumes that all buffers are of size (CIFSMaxBufSize +
MAX_CIFS_HDR_SIZE) , unfortunately it is also called with smaller
(MAX_CIFS_SMALL_BUFFER_SIZE) buffers. There are eight callers
(SMB worker functions) which are primarily affected by this change:
TreeDisconnect, uLogoff, Close, findClose, SetFileSize, SetFileTimes,
Lock and PosixLock
CC: Dave Kleikamp <shaggy@austin.ibm.com>
CC: Przemyslaw Wegrzyn <czajnik@czajsoft.pl>
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs/cifsglob.h')
| -rw-r--r-- | fs/cifs/cifsglob.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 87f51f23276..4ff8179df7e 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -471,6 +471,17 @@ struct dir_notify_req { #define CIFS_LARGE_BUFFER 2 #define CIFS_IOVEC 4 /* array of response buffers */ +/* Type of Request to SendReceive2 */ +#define CIFS_STD_OP 0 /* normal request timeout */ +#define CIFS_LONG_OP 1 /* long op (up to 45 sec, oplock time) */ +#define CIFS_VLONG_OP 2 /* sloow op - can take up to 180 seconds */ +#define CIFS_BLOCKING_OP 4 /* operation can block */ +#define CIFS_ASYNC_OP 8 /* do not wait for response */ +#define CIFS_TIMEOUT_MASK 0x00F /* only one of 5 above set in req */ +#define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */ +#define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */ +#define CIFS_NO_RESP 0x040 /* no response buffer required */ + /* Security Flags: indicate type of session setup needed */ #define CIFSSEC_MAY_SIGN 0x00001 #define CIFSSEC_MAY_NTLM 0x00002 |