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| author |   Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2020-11-27 10:14:18 +0530 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2020-12-04 01:01:26 +1100 |
| commit | eb232b1624462752dc916d9015b31ecdac0a01f1 (patch) | |
| tree | 441bc498a79aa7434ed9cfa3152f0f4e030f3f74 /arch/powerpc/mm/fault.c | |
| parent | powerpc/book3s64/kuap: Restrict access to userspace based on userspace AMR (diff) | |
| download | linux-dev-eb232b1624462752dc916d9015b31ecdac0a01f1.tar.xz linux-dev-eb232b1624462752dc916d9015b31ecdac0a01f1.zip | |
powerpc/book3s64/kuap: Improve error reporting with KUAP
With hash translation use DSISR_KEYFAULT to identify a wrong access.
With Radix we look at the AMR value and type of fault.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-17-aneesh.kumar@linux.ibm.com
Diffstat (limited to 'arch/powerpc/mm/fault.c')
| -rw-r--r-- | arch/powerpc/mm/fault.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c index 0add963a849b..c91621df0c61 100644 --- a/arch/powerpc/mm/fault.c +++ b/arch/powerpc/mm/fault.c @@ -227,7 +227,7 @@ static bool bad_kernel_fault(struct pt_regs *regs, unsigned long error_code, // Read/write fault in a valid region (the exception table search passed // above), but blocked by KUAP is bad, it can never succeed. - if (bad_kuap_fault(regs, address, is_write)) + if (bad_kuap_fault(regs, address, is_write, error_code)) return true; // What's left? Kernel fault on user in well defined regions (extable |