Andrew Donnellan 61e3acd8c6 powerpc: Fix __clear_user() with KUAP enabled ... The KUAP implementation adds calls in clear_user() to enable and disable access to userspace memory. However, it doesn't add these to __clear_user(), which is used in the ptrace regset code. As there's only one direct user of __clear_user() (the regset code), and the time taken to set the AMR for KUAP purposes is going to dominate the cost of a quick access_ok(), there's not much point having a separate path. Rename __clear_user() to __arch_clear_user(), and make __clear_user() just call clear_user(). Reported-by: syzbot+f25ecf4b2982d8c7a640@syzkaller-ppc64.appspotmail.com Reported-by: Daniel Axtens <dja@axtens.net> Suggested-by: Michael Ellerman <mpe@ellerman.id.au> Fixes: de78a9c42a ("powerpc: Add a framework for Kernel Userspace Access Protection") Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com> [mpe: Use __arch_clear_user() for the asm version like arm64 & nds32] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20191209132221.15328-1-ajd@linux.ibm.com		2019-12-16 23:19:44 +11:00
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alloc.c
checksum_32.S
checksum_64.S
checksum_wrappers.c
code-patching.c
copy_32.S
copypage_64.S
copypage_power7.S
copyuser_64.S
copyuser_power7.S
crtsavres.S
div64.S
error-inject.c
feature-fixups-test.S
feature-fixups.c
hweight_64.S
ldstfp.S
locks.c
Makefile
mem_64.S
memcmp_32.S
memcmp_64.S
memcpy_64.S
memcpy_mcsafe_64.S
memcpy_power7.S
pmem.c
quad.S
rheap.c
sstep.c
string_32.S
string_64.S
string.S
strlen_32.S
test_emulate_step_exec_instr.S
test_emulate_step.c
vmx-helper.c
xor_vmx_glue.c
xor_vmx.c
xor_vmx.h