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authorSteve French <sfrench@us.ibm.com>2007-11-13 22:41:37 +0000
committerSteve French <sfrench@us.ibm.com>2007-11-13 22:41:37 +0000
commit133672efbc1085f9af990bdc145e1822ea93bcf3 (patch)
treeb93b5ba3a9559d137fe7fb86f6d1a3d33189ce0b /fs/cifs/cifsglob.h
parent9418d5dc9ba40b88737580457bf3b7c63c60ec43 (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.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 87f51f23276f..4ff8179df7ec 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