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Matthew Wilcox (Oracle) b21dace010 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: b18dc5f291c0 ("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>
 		2021-04-12 12:53:11 +08:00
..
acpi ACPICA: Fix exception code class checks 2021-04-12 12:52:13 +08:00
asm-generic vmlinux.lds.h: add DWARF v5 sections 2021-04-12 12:52:10 +08:00
clocksource Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
crypto crypto - shash: reduce minimum alignment of shash_desc structure 2021-04-12 12:52:52 +08:00
drm iommu/vt-d: Move intel_iommu_gfx_mapped to Intel IOMMU header 2021-03-16 16:41:21 +08:00
dt-bindings Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
keys KEYS: Don't write out to userspace while holding key semaphore 2021-03-16 16:26:42 +08:00
kvm Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
linux include/linux/sched/mm.h: use rcu_dereference in in_vfork() 2021-04-12 12:53:11 +08:00
math-emu Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
media media: rc: compile rc-cec.c into rc-core 2021-04-12 12:53:01 +08:00
misc Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
net net: sched: fix police ext initialization 2021-04-12 12:52:42 +08:00
pcmcia Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
ras Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
rdma RDMA/umem: Fix signature of stub ib_umem_find_best_pgsz() 2021-03-16 16:38:49 +08:00
scsi scsi: libiscsi: Fix NOP race condition 2021-03-16 16:41:40 +08:00
soc irqchip/eznps: Fix build error for !ARC700 builds 2021-03-16 16:35:56 +08:00
sound ALSA: hda: intel-nhlt: verify config type 2021-04-12 12:52:52 +08:00
target scsi: target: core: Add cmd length set before cmd complete 2021-04-12 12:53:04 +08:00
trace writeback: Drop I_DIRTY_TIME_EXPIRE 2021-04-12 12:51:42 +08:00
uapi uapi: nfnetlink_cthelper.h: fix userspace compilation error 2021-04-12 12:52:55 +08:00
vdso Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
video Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
xen Xen/gntdev: correct error checking in gntdev_map_grant_pages() 2021-04-12 12:52:07 +08:00