diff options
| author | Yuanzheng Song <songyuanzheng@huawei.com> | 2021-10-15 08:32:30 +0000 |
|---|---|---|
| committer | Daniel Lezcano <daniel.lezcano@linaro.org> | 2021-10-15 13:58:36 +0200 |
| commit | 1dd7128b839f631b31a9e9dce3aaf639bef74e9d (patch) | |
| tree | efc4dbae3cb78bec79e18635c03a6515a95ab9d1 /drivers/thermal | |
| parent | c3131bd5586d3e8b67dc69516e1734a7a03e19d7 (diff) | |
thermal/core: Fix null pointer dereference in thermal_release()
If both dev_set_name() and device_register() failed, then null pointer
dereference occurs in thermal_release() which will use strncmp() to
compare the name.
So fix it by adding dev_set_name() return value check.
Signed-off-by: Yuanzheng Song <songyuanzheng@huawei.com>
Link: https://lore.kernel.org/r/20211015083230.67658-1-songyuanzheng@huawei.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Diffstat (limited to 'drivers/thermal')
| -rw-r--r-- | drivers/thermal/thermal_core.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index 9e243d9f929e..6904b97fd6ea 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -904,6 +904,10 @@ __thermal_cooling_device_register(struct device_node *np, goto out_kfree_cdev; cdev->id = ret; + ret = dev_set_name(&cdev->device, "cooling_device%d", cdev->id); + if (ret) + goto out_ida_remove; + cdev->type = kstrdup(type ? type : "", GFP_KERNEL); if (!cdev->type) { ret = -ENOMEM; @@ -918,7 +922,6 @@ __thermal_cooling_device_register(struct device_node *np, cdev->device.class = &thermal_class; cdev->devdata = devdata; thermal_cooling_device_setup_sysfs(cdev); - dev_set_name(&cdev->device, "cooling_device%d", cdev->id); ret = device_register(&cdev->device); if (ret) goto out_kfree_type; @@ -1229,6 +1232,10 @@ thermal_zone_device_register(const char *type, int trips, int mask, tz->id = id; strlcpy(tz->type, type, sizeof(tz->type)); + result = dev_set_name(&tz->device, "thermal_zone%d", tz->id); + if (result) + goto remove_id; + if (!ops->critical) ops->critical = thermal_zone_device_critical; @@ -1250,7 +1257,6 @@ thermal_zone_device_register(const char *type, int trips, int mask, /* A new thermal zone needs to be updated anyway. */ atomic_set(&tz->need_update, 1); - dev_set_name(&tz->device, "thermal_zone%d", tz->id); result = device_register(&tz->device); if (result) goto release_device; |