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| author | Mike Christie <michaelc@cs.wisc.edu> | 2012-01-26 21:13:10 -0600 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2012-02-19 08:09:00 -0600 |
| commit | 1304be5fe0efb42b7ec6a50dd8e1a9bce2adae17 (patch) | |
| tree | bc3d95ab7c1cc5d779df4696aaa138b7cbd89825 /drivers/scsi/cxgbi | |
| parent | df1c7baba1b7b3053950f3845a6575aca47ba9ce (diff) | |
| download | linux-1304be5fe0efb42b7ec6a50dd8e1a9bce2adae17.tar.gz linux-1304be5fe0efb42b7ec6a50dd8e1a9bce2adae17.tar.bz2 linux-1304be5fe0efb42b7ec6a50dd8e1a9bce2adae17.zip | |
[SCSI] libiscsi_tcp: fix max_r2t manipulation
Problem description from Xi Wang:
A large max_r2t could lead to integer overflow in subsequent call to
iscsi_tcp_r2tpool_alloc(), allocating a smaller buffer than expected
and leading to out-of-bounds write.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/cxgbi')
| -rw-r--r-- | drivers/scsi/cxgbi/libcxgbi.c | 13 |
1 files changed, 2 insertions, 11 deletions
diff --git a/drivers/scsi/cxgbi/libcxgbi.c b/drivers/scsi/cxgbi/libcxgbi.c index d3ff9cd40234..e6e6aa9289b8 100644 --- a/drivers/scsi/cxgbi/libcxgbi.c +++ b/drivers/scsi/cxgbi/libcxgbi.c @@ -2148,11 +2148,10 @@ int cxgbi_set_conn_param(struct iscsi_cls_conn *cls_conn, enum iscsi_param param, char *buf, int buflen) { struct iscsi_conn *conn = cls_conn->dd_data; - struct iscsi_session *session = conn->session; struct iscsi_tcp_conn *tcp_conn = conn->dd_data; struct cxgbi_conn *cconn = tcp_conn->dd_data; struct cxgbi_sock *csk = cconn->cep->csk; - int value, err = 0; + int err; log_debug(1 << CXGBI_DBG_ISCSI, "cls_conn 0x%p, param %d, buf(%d) %s.\n", @@ -2174,15 +2173,7 @@ int cxgbi_set_conn_param(struct iscsi_cls_conn *cls_conn, conn->datadgst_en, 0); break; case ISCSI_PARAM_MAX_R2T: - sscanf(buf, "%d", &value); - if (value <= 0 || !is_power_of_2(value)) - return -EINVAL; - if (session->max_r2t == value) - break; - iscsi_tcp_r2tpool_free(session); - err = iscsi_set_param(cls_conn, param, buf, buflen); - if (!err && iscsi_tcp_r2tpool_alloc(session)) - return -ENOMEM; + return iscsi_tcp_set_max_r2t(conn, buf); case ISCSI_PARAM_MAX_RECV_DLENGTH: err = iscsi_set_param(cls_conn, param, buf, buflen); if (!err) |