diff options
| author | Yi Yang <yiyang13@huawei.com> | 2023-09-04 05:52:20 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-09-18 11:14:42 +0200 |
| commit | d81ffb87aaa75f842cd7aa57091810353755b3e6 (patch) | |
| tree | 1170f1004e81c4766035981a4f404da5aaf693a1 | |
| parent | serial: stm32: add support for break control (diff) | |
| download | linux-d81ffb87aaa75f842cd7aa57091810353755b3e6.tar.xz linux-d81ffb87aaa75f842cd7aa57091810353755b3e6.zip | |
tty: vcc: Add check for kstrdup() in vcc_probe()
Add check for the return value of kstrdup() and return the error, if it
fails in order to avoid NULL pointer dereference.
Signed-off-by: Yi Yang <yiyang13@huawei.com>
Reviewed-by: Jiri Slaby <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20230904035220.48164-1-yiyang13@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/vcc.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/drivers/tty/vcc.c b/drivers/tty/vcc.c index a39ed981bfd3..5b625f20233b 100644 --- a/drivers/tty/vcc.c +++ b/drivers/tty/vcc.c @@ -579,18 +579,22 @@ static int vcc_probe(struct vio_dev *vdev, const struct vio_device_id *id) return -ENOMEM; name = kstrdup(dev_name(&vdev->dev), GFP_KERNEL); + if (!name) { + rv = -ENOMEM; + goto free_port; + } rv = vio_driver_init(&port->vio, vdev, VDEV_CONSOLE_CON, vcc_versions, ARRAY_SIZE(vcc_versions), NULL, name); if (rv) - goto free_port; + goto free_name; port->vio.debug = vcc_dbg_vio; vcc_ldc_cfg.debug = vcc_dbg_ldc; rv = vio_ldc_alloc(&port->vio, &vcc_ldc_cfg, port); if (rv) - goto free_port; + goto free_name; spin_lock_init(&port->lock); @@ -624,6 +628,11 @@ static int vcc_probe(struct vio_dev *vdev, const struct vio_device_id *id) goto unreg_tty; } port->domain = kstrdup(domain, GFP_KERNEL); + if (!port->domain) { + rv = -ENOMEM; + goto unreg_tty; + } + mdesc_release(hp); @@ -653,8 +662,9 @@ free_table: vcc_table_remove(port->index); free_ldc: vio_ldc_free(&port->vio); -free_port: +free_name: kfree(name); +free_port: kfree(port); return rv; |