Will Deacon 6e693b3ffe x86: uaccess: Inhibit speculation past access_ok() in user_access_begin() ... Commit 594cc251fd ("make 'user_access_begin()' do 'access_ok()'") makes the access_ok() check part of the user_access_begin() preceding a series of 'unsafe' accesses. This has the desirable effect of ensuring that all 'unsafe' accesses have been range-checked, without having to pick through all of the callsites to verify whether the appropriate checking has been made. However, the consolidated range check does not inhibit speculation, so it is still up to the caller to ensure that they are not susceptible to any speculative side-channel attacks for user addresses that ultimately fail the access_ok() check. This is an oversight, so use __uaccess_begin_nospec() to ensure that speculation is inhibited until the access_ok() check has passed. Reported-by: Julien Thierry <julien.thierry@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2019-01-20 15:33:22 +12:00
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alpha
arc
arm
arm64	kasan, arm64: remove redundant ARCH_SLAB_MINALIGN define	2019-01-16 12:09:11 +00:00
c6x
csky
h8300	kbuild: remove unused archmrproper	2019-01-16 23:31:17 +09:00
hexagon
ia64	ia64: remove redundant 'export AWK'	2019-01-16 23:31:18 +09:00
m68k
microblaze
mips	A few MIPS fixes for 5.0:	2019-01-20 10:33:18 +12:00
nds32	nds32: remove unneeded code in arch/nds32/Makefile	2019-01-17 23:42:37 +09:00
nios2
openrisc	openrisc: remove unneeded code in arch/openrisc/Makefile	2019-01-17 23:42:59 +09:00
parisc
powerpc	A single build fix for powerpc due to device_node.type removal	2019-01-20 10:28:46 +12:00
riscv
s390
sh
sparc
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unicore32
x86	x86: uaccess: Inhibit speculation past access_ok() in user_access_begin()	2019-01-20 15:33:22 +12:00
xtensa
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