Andrew Donnellan e83c40f7bb powerpc: Fix __clear_user() with KUAP enabled ... commit 61e3acd8c6 upstream. 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 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-01-04 19:18:37 +01:00
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alpha	…
arc	…
arm	libfdt: define INT32_MAX and UINT32_MAX in libfdt_env.h	2020-01-04 19:18:28 +01:00
arm64	KVM: arm64: Ensure 'params' is initialised when looking up sys register	2019-12-31 16:46:24 +01:00
c6x	…
csky	…
h8300	…
hexagon	…
ia64	…
m68k	…
microblaze	…
mips	Revert "MIPS: futex: Emit Loongson3 sync workarounds within asm"	2020-01-04 19:16:21 +01:00
nds32	…
nios2	…
openrisc	…
parisc	…
powerpc	powerpc: Fix __clear_user() with KUAP enabled	2020-01-04 19:18:37 +01:00
riscv	…
s390	s390: disable preemption when switching to nodat stack with CALL_ON_STACK	2020-01-04 19:18:31 +01:00
sh	pinctrl: sh-pfc: sh7734: Fix duplicate TCLK1_B	2019-12-31 16:44:32 +01:00
sparc	sparc64: implement ioremap_uc	2019-12-13 08:42:17 +01:00
um	um: virtio: Keep reading on -EAGAIN	2020-01-04 19:18:24 +01:00
unicore32	…
x86	x86/mce: Fix possibly incorrect severity calculation on AMD	2019-12-31 16:46:27 +01:00
xtensa	xtensa: fix syscall_set_return_value	2019-12-21 11:04:35 +01:00
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Kconfig	…