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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-04-10 15:13:06 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-04-10 15:13:06 +0200 |
| commit | 523aa3586ffb1fc11a9bf88f77ebaf71a15eb998 (patch) | |
| tree | 1fe96f54e8f1e667798a49ae4b3f951feb136ae0 /arch/parisc/mm/fault.c | |
| parent | fd0f50db2eb72555ef8f70af14c1e3ee2079b32c (diff) | |
| parent | 39da7c509acff13fc8cb12ec1bb20337c988ed36 (diff) | |
Merge 4.11-rc6 into driver-core-next
We want the fixes in here as well for testing.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/parisc/mm/fault.c')
| -rw-r--r-- | arch/parisc/mm/fault.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c index deab89a8915a..32ec22146141 100644 --- a/arch/parisc/mm/fault.c +++ b/arch/parisc/mm/fault.c @@ -150,6 +150,23 @@ int fixup_exception(struct pt_regs *regs) d->fault_space = regs->isr; d->fault_addr = regs->ior; + /* + * Fix up get_user() and put_user(). + * ASM_EXCEPTIONTABLE_ENTRY_EFAULT() sets the least-significant + * bit in the relative address of the fixup routine to indicate + * that %r8 should be loaded with -EFAULT to report a userspace + * access error. + */ + if (fix->fixup & 1) { + regs->gr[8] = -EFAULT; + + /* zero target register for get_user() */ + if (parisc_acctyp(0, regs->iir) == VM_READ) { + int treg = regs->iir & 0x1f; + regs->gr[treg] = 0; + } + } + regs->iaoq[0] = (unsigned long)&fix->fixup + fix->fixup; regs->iaoq[0] &= ~3; /* |