diff options
| author | Peter Collingbourne <pcc@google.com> | 2020-10-13 22:24:30 -0700 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-10-15 10:50:09 +0100 |
| commit | 4b7a6ce71e033666d6f5a577deb7f1f5126ed889 (patch) | |
| tree | 832be88c15ac3ab6f70f229860190f642185ce2c /tools/testing/selftests/bpf/prog_tests/tcpbpf_user.c | |
| parent | d13027bb35e089bc1bb9f19c4976decf32a09b97 (diff) | |
arm64: reject prctl(PR_PAC_RESET_KEYS) on compat tasks
It doesn't make sense to issue prctl(PR_PAC_RESET_KEYS) on a
compat task because the 32-bit instruction set does not offer PAuth
instructions. For consistency with other 64-bit only prctls such as
{SET,GET}_TAGGED_ADDR_CTRL, reject the prctl on compat tasks.
Although this is a userspace-visible change, maybe it isn't too late
to make this change given that the hardware isn't available yet and
it's very unlikely that anyone has 32-bit software that actually
depends on this succeeding.
Signed-off-by: Peter Collingbourne <pcc@google.com>
Link: https://linux-review.googlesource.com/id/Ie885a1ff84ab498cc9f62d6451e9f2cfd4b1d06a
Link: https://lore.kernel.org/r/20201014052430.11630-1-pcc@google.com
[will: Do the same for the SVE prctl()s]
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/tcpbpf_user.c')
0 files changed, 0 insertions, 0 deletions