Jann Horn 0b9dc6c9f0 keys: safe concurrent user->{session,uid}_keyring access ... The current code can perform concurrent updates and reads on user->session_keyring and user->uid_keyring. Add a comment to struct user_struct to document the nontrivial locking semantics, and use READ_ONCE() for unlocked readers and smp_store_release() for writers to prevent memory ordering issues. Fixes: 69664cf16a ("keys: don't generate user and user session keyrings unless they're accessed") Signed-off-by: Jann Horn <jannh@google.com> Signed-off-by: James Morris <james.morris@microsoft.com>		2019-04-10 10:29:50 -07:00
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autogroup.h
clock.h
coredump.h	oom, oom_reaper: do not enqueue same task twice	2019-02-01 15:46:23 -08:00
cpufreq.h
cputime.h
deadline.h
debug.h
hotplug.h
idle.h
init.h
isolation.h
jobctl.h
loadavg.h
mm.h	mm/cma: add PF flag to force non cma alloc	2019-03-05 21:07:19 -08:00
nohz.h
numa_balancing.h
prio.h
rt.h
signal.h	sched/core: Convert signal_struct.sigcnt to refcount_t	2019-02-04 08:53:53 +01:00
smt.h
stat.h
sysctl.h	sched/topology: Introduce a sysctl for Energy Aware Scheduling	2019-01-27 12:29:37 +01:00
task_stack.h	sched/core: Convert task_struct.stack_refcount to refcount_t	2019-02-04 08:53:56 +01:00
task.h	sched/core: Convert task_struct.usage to refcount_t	2019-02-04 08:53:55 +01:00
topology.h	sched/topology: Fix percpu data types in struct sd_data & struct s_data	2019-02-11 08:02:15 +01:00
user.h	keys: safe concurrent user->{session,uid}_keyring access	2019-04-10 10:29:50 -07:00
wake_q.h	sched/wake_q: Reduce reference counting for special users	2019-02-04 09:03:28 +01:00
xacct.h