Matthew Wilcox (Oracle) 3cbe8f9193 include/linux/sched/mm.h: use rcu_dereference in in_vfork() ...

[ Upstream commit 149fc787353f65b7e72e05e7b75d34863266c3e2 ]

Fix a sparse warning by using rcu_dereference().  Technically this is a
bug and a sufficiently aggressive compiler could reload the `real_parent'
pointer outside the protection of the rcu lock (and access freed memory),
but I think it's pretty unlikely to happen.

Link: https://lkml.kernel.org/r/20210221194207.1351703-1-willy@infradead.org
Fixes: b18dc5f291 ("mm, oom: skip vforked tasks from being selected")
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2021-03-17 17:06:34 +01:00

..

autogroup.h

…

clock.h

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coredump.h

mm, oom_adj: don't loop through tasks in __set_oom_adj when not necessary

2020-10-13 18:38:35 -07:00

cpufreq.h

sched/fair: Remove redundant call to cpufreq_update_util()

2020-01-17 10:19:22 +01:00

cputime.h

posix-cpu-timers: Move state tracking to struct posix_cputimers

2019-08-28 11:50:42 +02:00

deadline.h

cpusets: Rebuild root domain deadline accounting information

2019-07-25 15:55:01 +02:00

debug.h

treewide: Convert macro and uses of __section(foo) to __section("foo")

2020-10-25 14:51:49 -07:00

hotplug.h

…

idle.h

…

init.h

…

isolation.h

isolcpus: Affine unbound kernel threads to housekeeping cpus

2020-06-15 14:10:03 +02:00

jobctl.h

task_work: teach task_work_add() to do signal_wake_up()

2020-06-30 12:18:08 -06:00

loadavg.h

sched: nohz: stop passing around unused "ticks" parameter.

2020-07-22 10:22:04 +02:00

mm.h

include/linux/sched/mm.h: use rcu_dereference in in_vfork()

2021-03-17 17:06:34 +01:00

nohz.h

timers/nohz: Update NOHZ load in remote tick

2020-01-28 21:36:44 +01:00

numa_balancing.h

sched/fair: Don't free p->numa_faults with concurrent readers

2019-07-25 15:37:04 +02:00

prio.h

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rt.h

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sd_flags.h

sched/topology: Mark SD_NUMA as SDF_NEEDS_GROUPS

2020-08-19 10:49:50 +02:00

signal.h

exec: Transform exec_update_mutex into a rw_semaphore

2021-01-09 13:46:24 +01:00

smt.h

x86/speculation: Rework SMT state change

2018-11-28 11:57:07 +01:00

stat.h

sched: Fix various typos in comments

2018-12-03 11:55:42 +01:00

sysctl.h

sched/uclamp: Add a new sysctl to control RT default boost value

2020-07-29 13:51:47 +02:00

task_stack.h

sched/core: Convert task_struct.stack_refcount to refcount_t

2019-02-04 08:53:56 +01:00

task.h

sched: remove _do_fork()

2020-08-20 13:12:59 +02:00

topology.h

sched/topology: Move SD_DEGENERATE_GROUPS_MASK out of linux/sched/topology.h

2020-08-26 12:41:59 +02:00

types.h

posix-cpu-timers: Provide array based access to expiry cache

2019-08-28 11:50:35 +02:00

user.h

watch_queue: Limit the number of watches a user can hold

2020-08-17 09:39:18 -07:00

wake_q.h

locking/rwsem: Always release wait_lock before waking up tasks

2019-06-17 12:28:00 +02:00

xacct.h

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