mirror of https://github.com/torvalds/linux.git
bff1709b39
In the `mac802154_scan_worker` function, the `scan_req->type` field was
accessed after the RCU read-side critical section was unlocked. According
to RCU usage rules, this is illegal and can lead to unpredictable
behavior, such as accessing memory that has been updated or causing
use-after-free issues.
This possible bug was identified using a static analysis tool developed
by myself, specifically designed to detect RCU-related issues.
To address this, the `scan_req->type` value is now stored in a local
variable `scan_req_type` while still within the RCU read-side critical
section. The `scan_req_type` is then used after the RCU lock is released,
ensuring that the type value is safely accessed without violating RCU
rules.
Fixes:
|
||
|---|---|---|
| .. | ||
| Kconfig | ||
| Makefile | ||
| cfg.c | ||
| cfg.h | ||
| driver-ops.h | ||
| ieee802154_i.h | ||
| iface.c | ||
| llsec.c | ||
| llsec.h | ||
| mac_cmd.c | ||
| main.c | ||
| mib.c | ||
| rx.c | ||
| scan.c | ||
| trace.c | ||
| trace.h | ||
| tx.c | ||
| util.c | ||