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| author | Wenchao Hao <haowenchao@huawei.com> | 2022-03-10 02:57:58 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-03-15 05:19:50 +0100 |
| commit | 7dae459f5e56a89ab01413ae055595c982713349 (patch) | |
| tree | 659ba5e8d407b26d135cb2aa03e35b7dc37813ac /drivers/scsi/libiscsi.c | |
| parent | scsi: iscsi: Add helper functions to manage iscsi_cls_conn (diff) | |
| download | linux-7dae459f5e56a89ab01413ae055595c982713349.tar.xz linux-7dae459f5e56a89ab01413ae055595c982713349.zip | |
scsi: libiscsi: Add iscsi_cls_conn to sysfs after initialization
iscsi_create_conn() exposed iscsi_cls_conn to sysfs prior to initialization
of iscsi_conn's dd_data. When userspace tried to access an attribute such
as the connect address, a NULL pointer dereference was observed.
Do not add iscsi_cls_conn to sysfs until it has been initialized. Remove
iscsi_create_conn() since it is no longer used.
Link: https://lore.kernel.org/r/20220310015759.3296841-3-haowenchao@huawei.com
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Wenchao Hao <haowenchao@huawei.com>
Signed-off-by: Wu Bo <wubo40@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/libiscsi.c')
| -rw-r--r-- | drivers/scsi/libiscsi.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index c84c2a349e28..69ddc9f585c5 100644 --- a/drivers/scsi/libiscsi.c +++ b/drivers/scsi/libiscsi.c @@ -3038,8 +3038,9 @@ iscsi_conn_setup(struct iscsi_cls_session *cls_session, int dd_size, struct iscsi_conn *conn; struct iscsi_cls_conn *cls_conn; char *data; + int err; - cls_conn = iscsi_create_conn(cls_session, sizeof(*conn) + dd_size, + cls_conn = iscsi_alloc_conn(cls_session, sizeof(*conn) + dd_size, conn_idx); if (!cls_conn) return NULL; @@ -3076,13 +3077,21 @@ iscsi_conn_setup(struct iscsi_cls_session *cls_session, int dd_size, goto login_task_data_alloc_fail; conn->login_task->data = conn->data = data; + err = iscsi_add_conn(cls_conn); + if (err) + goto login_task_add_dev_fail; + return cls_conn; +login_task_add_dev_fail: + free_pages((unsigned long) conn->data, + get_order(ISCSI_DEF_MAX_RECV_SEG_LEN)); + login_task_data_alloc_fail: kfifo_in(&session->cmdpool.queue, (void*)&conn->login_task, sizeof(void*)); login_task_alloc_fail: - iscsi_destroy_conn(cls_conn); + iscsi_put_conn(cls_conn); return NULL; } EXPORT_SYMBOL_GPL(iscsi_conn_setup); |