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author | Russell King <rmk+kernel@armlinux.org.uk> | 2018-10-04 00:56:05 -0400 |
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committer | David A. Long <dave.long@linaro.org> | 2018-10-30 23:23:46 -0400 |
commit | 518029530e79cc29a8b32d24903a0be22257e9fc (patch) | |
tree | 46beaaed9259259d162d750246beccb6bda5989b /mm/process_vm_access.c | |
parent | 142fee8a5498ccd0a377d20c5072b7dc9a2c359b (diff) |
ARM: spectre-v1: use get_user() for __get_user()
Commit b1cd0a14806321721aae45f5446ed83a3647c914 upstream.
Fixing __get_user() for spectre variant 1 is not sane: we would have to
add address space bounds checking in order to validate that the location
should be accessed, and then zero the address if found to be invalid.
Since __get_user() is supposed to avoid the bounds check, and this is
exactly what get_user() does, there's no point having two different
implementations that are doing the same thing. So, when the Spectre
workarounds are required, make __get_user() an alias of get_user().
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David A. Long <dave.long@linaro.org>
Diffstat (limited to 'mm/process_vm_access.c')
0 files changed, 0 insertions, 0 deletions