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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-02-28 19:13:16 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-02-28 19:13:16 +0100 |
| commit | 642c4c75a765d7a3244ab39c8e6fb09be21eca5b (patch) | |
| tree | ce0be9b476f362835d3a3d6e4fd32801cd15c9fe /security | |
| parent | Merge branches 'core-ipi-for-linus', 'core-locking-for-linus', 'tracing-fixes... (diff) | |
| parent | rcu: Fix accelerated GPs for last non-dynticked CPU (diff) | |
| download | linux-642c4c75a765d7a3244ab39c8e6fb09be21eca5b.tar.xz linux-642c4c75a765d7a3244ab39c8e6fb09be21eca5b.zip | |
Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (44 commits)
rcu: Fix accelerated GPs for last non-dynticked CPU
rcu: Make non-RCU_PROVE_LOCKING rcu_read_lock_sched_held() understand boot
rcu: Fix accelerated grace periods for last non-dynticked CPU
rcu: Export rcu_scheduler_active
rcu: Make rcu_read_lock_sched_held() take boot time into account
rcu: Make lockdep_rcu_dereference() message less alarmist
sched, cgroups: Fix module export
rcu: Add RCU_CPU_STALL_VERBOSE to dump detailed per-task information
rcu: Fix rcutorture mod_timer argument to delay one jiffy
rcu: Fix deadlock in TREE_PREEMPT_RCU CPU stall detection
rcu: Convert to raw_spinlocks
rcu: Stop overflowing signed integers
rcu: Use canonical URL for Mathieu's dissertation
rcu: Accelerate grace period if last non-dynticked CPU
rcu: Fix citation of Mathieu's dissertation
rcu: Documentation update for CONFIG_PROVE_RCU
security: Apply lockdep-based checking to rcu_dereference() uses
idr: Apply lockdep-based diagnostics to rcu_dereference() uses
radix-tree: Disable RCU lockdep checking in radix tree
vfs: Abstract rcu_dereference_check for files-fdtable use
...
Diffstat (limited to 'security')
| -rw-r--r-- | security/keys/gc.c | 3 | ||||
| -rw-r--r-- | security/keys/keyring.c | 4 |
2 files changed, 5 insertions, 2 deletions
diff --git a/security/keys/gc.c b/security/keys/gc.c index 4770be375ffe..19902319d097 100644 --- a/security/keys/gc.c +++ b/security/keys/gc.c @@ -77,7 +77,8 @@ static bool key_gc_keyring(struct key *keyring, time_t limit) goto dont_gc; /* scan the keyring looking for dead keys */ - klist = rcu_dereference(keyring->payload.subscriptions); + klist = rcu_dereference_check(keyring->payload.subscriptions, + lockdep_is_held(&key_serial_lock)); if (!klist) goto dont_gc; diff --git a/security/keys/keyring.c b/security/keys/keyring.c index 8ec02746ca99..e814d2109f8e 100644 --- a/security/keys/keyring.c +++ b/security/keys/keyring.c @@ -151,7 +151,9 @@ static void keyring_destroy(struct key *keyring) write_unlock(&keyring_name_lock); } - klist = rcu_dereference(keyring->payload.subscriptions); + klist = rcu_dereference_check(keyring->payload.subscriptions, + rcu_read_lock_held() || + atomic_read(&keyring->usage) == 0); if (klist) { for (loop = klist->nkeys - 1; loop >= 0; loop--) key_put(klist->keys[loop]); |