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| author | James Morse <james.morse@arm.com> | 2016-06-20 17:28:01 (GMT) |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2016-07-07 14:55:37 (GMT) |
| commit | e19a6ee2460bdd0d0055a6029383422773f9999a (patch) | |
| tree | f8e7898101568c82617d7afd66e712b9f0538a0e /arch/s390/kernel/vdso.c | |
| parent | 4c2e07c6a29e0129e975727b9f57eede813eea85 (diff) | |
| download | linux-e19a6ee2460bdd0d0055a6029383422773f9999a.tar.xz | |
arm64: kernel: Save and restore UAO and addr_limit on exception entry
If we take an exception while at EL1, the exception handler inherits
the original context's addr_limit and PSTATE.UAO values. To be consistent
always reset addr_limit and PSTATE.UAO on (re-)entry to EL1. This
prevents accidental re-use of the original context's addr_limit.
Based on a similar patch for arm from Russell King.
Cc: <stable@vger.kernel.org> # 4.6-
Acked-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/s390/kernel/vdso.c')
0 files changed, 0 insertions, 0 deletions