CVE-2025-68336

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> locking/spinlock/debug: Fix data-race in do_raw_write_lock<br /> <br /> KCSAN reports:<br /> <br /> BUG: KCSAN: data-race in do_raw_write_lock / do_raw_write_lock<br /> <br /> write (marked) to 0xffff800009cf504c of 4 bytes by task 1102 on cpu 1:<br /> do_raw_write_lock+0x120/0x204<br /> _raw_write_lock_irq<br /> do_exit<br /> call_usermodehelper_exec_async<br /> ret_from_fork<br /> <br /> read to 0xffff800009cf504c of 4 bytes by task 1103 on cpu 0:<br /> do_raw_write_lock+0x88/0x204<br /> _raw_write_lock_irq<br /> do_exit<br /> call_usermodehelper_exec_async<br /> ret_from_fork<br /> <br /> value changed: 0xffffffff -&gt; 0x00000001<br /> <br /> Reported by Kernel Concurrency Sanitizer on:<br /> CPU: 0 PID: 1103 Comm: kworker/u4:1 6.1.111<br /> <br /> Commit 1a365e822372 ("locking/spinlock/debug: Fix various data races") has<br /> adressed most of these races, but seems to be not consistent/not complete.<br /> <br /> &gt;From do_raw_write_lock() only debug_write_lock_after() part has been<br /> converted to WRITE_ONCE(), but not debug_write_lock_before() part.<br /> Do it now.