lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Mon, 3 Dec 2018 16:28:25 -0800 From: Bart Van Assche <bvanassche@....org> To: mingo@...hat.com Cc: peterz@...radead.org, tj@...nel.org, longman@...hat.com, johannes.berg@...el.com, linux-kernel@...r.kernel.org, Bart Van Assche <bvanassche@....org>, Johannes Berg <johannes@...solutions.net> Subject: [PATCH v2 16/24] locking/lockdep: Retain the class key and name while freeing a lock class The next patch in this series uses the class name in code that detects lock class use-after-free. Hence retain the class name for lock classes that are being freed. Cc: Peter Zijlstra <peterz@...radead.org> Cc: Waiman Long <longman@...hat.com> Cc: Johannes Berg <johannes@...solutions.net> Signed-off-by: Bart Van Assche <bvanassche@....org> --- kernel/locking/lockdep.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index ecd92969674c..92bdb187987f 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -4147,10 +4147,8 @@ static void zap_class(struct lock_class *class) * Unhash the class and remove it from the all_lock_classes list: */ hlist_del_rcu(&class->hash_entry); + class->hash_entry.pprev = NULL; list_del(&class->lock_entry); - - RCU_INIT_POINTER(class->key, NULL); - RCU_INIT_POINTER(class->name, NULL); } static inline int within(const void *addr, void *start, unsigned long size) -- 2.20.0.rc1.387.gf8505762e3-goog
Powered by blists - more mailing lists