android_kernel_samsung_msm8976/arch
Thiago Rafael Becker 079cf0277b kernel: make groups_sort calling a responsibility group_info allocators
commit bdcf0a423ea1c40bbb40e7ee483b50fc8aa3d758 upstream.

In testing, we found that nfsd threads may call set_groups in parallel
for the same entry cached in auth.unix.gid, racing in the call of
groups_sort, corrupting the groups for that entry and leading to
permission denials for the client.

This patch:
 - Make groups_sort globally visible.
 - Move the call to groups_sort to the modifiers of group_info
 - Remove the call to groups_sort from set_groups

Link: http://lkml.kernel.org/r/20171211151420.18655-1-thiago.becker@gmail.com
Signed-off-by: Thiago Rafael Becker <thiago.becker@gmail.com>
Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com>
Reviewed-by: NeilBrown <neilb@suse.com>
Acked-by: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
2019-07-27 21:46:18 +02:00
..
alpha Safer ABI for O_TMPFILE 2018-12-03 11:52:36 +01:00
arc mm: larger stack guard gap, between vmas 2017-07-11 00:00:39 +00:00
arm arch/arm: dts: Fix nonzero values for boolean property 2019-07-27 21:45:57 +02:00
arm64 arm64: vdso: fix clock_getres for 4GiB-aligned res 2019-07-27 21:46:04 +02:00
avr32
blackfin
c6x
cris
frv mm: larger stack guard gap, between vmas 2017-07-11 00:00:39 +00:00
h8300
hexagon
ia64 Import latest Samsung release 2017-04-18 03:43:52 +02:00
m32r This is the 3.10.98 stable release 2017-04-18 17:17:24 +02:00
m68k Merge remote-tracking branch 'f2fs/linux-3.10.y' into HEAD 2017-04-18 17:02:28 +02:00
metag
microblaze
mips mm: larger stack guard gap, between vmas 2017-07-11 00:00:39 +00:00
mn10300 This is the 3.10.96 stable release 2017-04-18 17:16:02 +02:00
openrisc This is the 3.10.96 stable release 2017-04-18 17:16:02 +02:00
parisc Safer ABI for O_TMPFILE 2018-12-03 11:52:36 +01:00
powerpc mm: larger stack guard gap, between vmas 2017-07-11 00:00:39 +00:00
s390 kernel: make groups_sort calling a responsibility group_info allocators 2019-07-27 21:46:18 +02:00
score
sh mm: larger stack guard gap, between vmas 2017-07-11 00:00:39 +00:00
sparc Safer ABI for O_TMPFILE 2018-12-03 11:52:36 +01:00
tile mm: larger stack guard gap, between vmas 2017-07-11 00:00:39 +00:00
um This is the 3.10.99 stable release 2017-04-18 17:17:46 +02:00
unicore32
x86 crypto: salsa20 - fix blkcipher_walk API usage 2019-07-27 21:45:46 +02:00
xtensa mm: larger stack guard gap, between vmas 2017-07-11 00:00:39 +00:00
.gitignore
Kconfig FROMLIST: mm: mmap: Add new /proc tunable for mmap_base ASLR. 2016-05-18 14:36:00 +05:30