diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2024-10-11 11:35:30 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2024-10-11 11:35:30 -0700 |
commit | f8fafb690b7c2dfd6e388248a817fd7d1fd2420f (patch) | |
tree | ba1b6e793d83eeb2b006d8fe9c4123bfb6c8362e | |
parent | 325354cf00c7031c32618feaadc0f22eadee790c (diff) | |
parent | 827a07525c099f54d3b15110408824541ec66b3c (diff) |
Merge tag 'thermal-6.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull thermal control fixes from Rafael Wysocki:
"Address possible use-after-free scenarios during the processing of
thermal netlink commands and during thermal zone removal (Rafael
Wysocki)"
* tag 'thermal-6.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
thermal: core: Free tzp copy along with the thermal zone
thermal: core: Reference count the zone in thermal_zone_get_by_id()
-rw-r--r-- | drivers/thermal/thermal_core.c | 5 | ||||
-rw-r--r-- | drivers/thermal/thermal_core.h | 3 | ||||
-rw-r--r-- | drivers/thermal/thermal_netlink.c | 9 |
3 files changed, 8 insertions, 9 deletions
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index 073d02e21352..8f03985f971c 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -728,6 +728,7 @@ struct thermal_zone_device *thermal_zone_get_by_id(int id) mutex_lock(&thermal_list_lock); list_for_each_entry(tz, &thermal_tz_list, node) { if (tz->id == id) { + get_device(&tz->device); match = tz; break; } @@ -1605,14 +1606,12 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz) ida_destroy(&tz->ida); device_del(&tz->device); - - kfree(tz->tzp); - put_device(&tz->device); thermal_notify_tz_delete(tz); wait_for_completion(&tz->removal); + kfree(tz->tzp); kfree(tz); } EXPORT_SYMBOL_GPL(thermal_zone_device_unregister); diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h index 50b858aa173a..a64d39b1c86b 100644 --- a/drivers/thermal/thermal_core.h +++ b/drivers/thermal/thermal_core.h @@ -194,6 +194,9 @@ int for_each_thermal_governor(int (*cb)(struct thermal_governor *, void *), struct thermal_zone_device *thermal_zone_get_by_id(int id); +DEFINE_CLASS(thermal_zone_get_by_id, struct thermal_zone_device *, + if (_T) put_device(&_T->device), thermal_zone_get_by_id(id), int id) + static inline bool cdev_is_power_actor(struct thermal_cooling_device *cdev) { return cdev->ops->get_requested_power && cdev->ops->state2power && diff --git a/drivers/thermal/thermal_netlink.c b/drivers/thermal/thermal_netlink.c index 97157c453630..f3c58c708969 100644 --- a/drivers/thermal/thermal_netlink.c +++ b/drivers/thermal/thermal_netlink.c @@ -443,7 +443,6 @@ static int thermal_genl_cmd_tz_get_trip(struct param *p) { struct sk_buff *msg = p->msg; const struct thermal_trip_desc *td; - struct thermal_zone_device *tz; struct nlattr *start_trip; int id; @@ -452,7 +451,7 @@ static int thermal_genl_cmd_tz_get_trip(struct param *p) id = nla_get_u32(p->attrs[THERMAL_GENL_ATTR_TZ_ID]); - tz = thermal_zone_get_by_id(id); + CLASS(thermal_zone_get_by_id, tz)(id); if (!tz) return -EINVAL; @@ -488,7 +487,6 @@ out_cancel_nest: static int thermal_genl_cmd_tz_get_temp(struct param *p) { struct sk_buff *msg = p->msg; - struct thermal_zone_device *tz; int temp, ret, id; if (!p->attrs[THERMAL_GENL_ATTR_TZ_ID]) @@ -496,7 +494,7 @@ static int thermal_genl_cmd_tz_get_temp(struct param *p) id = nla_get_u32(p->attrs[THERMAL_GENL_ATTR_TZ_ID]); - tz = thermal_zone_get_by_id(id); + CLASS(thermal_zone_get_by_id, tz)(id); if (!tz) return -EINVAL; @@ -514,7 +512,6 @@ static int thermal_genl_cmd_tz_get_temp(struct param *p) static int thermal_genl_cmd_tz_get_gov(struct param *p) { struct sk_buff *msg = p->msg; - struct thermal_zone_device *tz; int id, ret = 0; if (!p->attrs[THERMAL_GENL_ATTR_TZ_ID]) @@ -522,7 +519,7 @@ static int thermal_genl_cmd_tz_get_gov(struct param *p) id = nla_get_u32(p->attrs[THERMAL_GENL_ATTR_TZ_ID]); - tz = thermal_zone_get_by_id(id); + CLASS(thermal_zone_get_by_id, tz)(id); if (!tz) return -EINVAL; |