Alexey Dobriyan b202ac9c73 proc: fix lookup in /proc/net subdirectories after setns(2) ... [ Upstream commit c6c75deda81344c3a95d1d1f606d5cee109e5d54 ] Commit 1fde6f21d9 ("proc: fix /proc/net/* after setns(2)") only forced revalidation of regular files under /proc/net/ However, /proc/net/ is unusual in the sense of /proc/net/foo handlers take netns pointer from parent directory which is old netns. Steps to reproduce: (void)open("/proc/net/sctp/snmp", O_RDONLY); unshare(CLONE_NEWNET); int fd = open("/proc/net/sctp/snmp", O_RDONLY); read(fd, &c, 1); Read will read wrong data from original netns. Patch forces lookup on every directory under /proc/net . Link: https://lkml.kernel.org/r/20201205160916.GA109739@localhost.localdomain Fixes: 1da4d377f9 ("proc: revalidate misc dentries") Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Reported-by: "Rantala, Tommi T. (Nokia - FI/Espoo)" <tommi.t.rantala@nokia.com> Cc: Al Viro <viro@zeniv.linux.org.uk> 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>		2020-12-30 11:53:56 +01:00
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acpi
asm-generic
clocksource
crypto
drm
dt-bindings
keys
kunit
kvm
linux	proc: fix lookup in /proc/net subdirectories after setns(2)	2020-12-30 11:53:56 +01:00
math-emu
media	media: v4l2-fwnode: v4l2_fwnode_endpoint_parse caller must init vep argument	2020-12-30 11:53:11 +01:00
memory
misc
net	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf	2020-12-10 14:29:30 -08:00
pcmcia
ras
rdma	RDMA/uverbs: Fix incorrect variable type	2020-12-30 11:53:47 +01:00
scsi
soc	net: mscc: ocelot: fix dropping of unknown IPv4 multicast on Seville	2020-12-05 15:41:34 -08:00
sound
target
trace
uapi	crypto: af_alg - avoid undefined behavior accessing salg_name	2020-12-26 16:02:45 +01:00
vdso
video
xen	xen: don't use page->lru for ZONE_DEVICE memory	2020-12-09 10:31:41 +01:00