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linux-stable/arch/powerpc
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Gavin Shan 6f20e7f2e9 powerpc/kernel: Avoid memory corruption at early stage 
When calling to early_setup(), we pick "boot_paca" up for the master CPU
and initialize that with initialise_paca(). At that point, the SLB
shadow buffer isn't populated yet. Updating the SLB shadow buffer should
corrupt what we had in physical address 0 where the trap instruction is
usually stored.

This hasn't been observed to cause any trouble in practice, but is
obviously fishy.

Fixes: 6f4441ef70 ("powerpc: Dynamically allocate slb_shadow from memblock")
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-01-23 14:02:52 +11:00
..
boot Merge remote-tracking branch 'scottwood/next' into next 2014-11-18 17:00:38 +11:00
configs powerpc/ps3: Enable CONFIG_PS3_REPOSITORY_WRITE in ps3_defconfig 2015-01-22 17:31:22 +11:00
crypto crypto: powerpc - replace memset by memzero_explicit 2014-12-02 22:55:50 +08:00
include powerpc/kprobes: Fix kallsyms lookup across powerpc ABIv1 and ABIv2 2015-01-23 14:02:51 +11:00
kernel powerpc/kernel: Avoid memory corruption at early stage 2015-01-23 14:02:52 +11:00
kvm powerpc/kvm: Create proper names for the kvm_host_state PMU fields 2014-12-29 15:45:55 +11:00
lib powerpc/lib: Do not include string.o in obj-y twice 2014-12-29 15:45:55 +11:00
math-emu
mm mm/debug-pagealloc: make debug-pagealloc boottime configurable 2014-12-13 12:42:48 -08:00
net PPC: bpf_jit_comp: Unify BPF_MOD | BPF_X and BPF_DIV | BPF_X 2014-11-18 13:20:09 -05:00
oprofile powerpc updates for 3.19 2014-12-11 17:48:14 -08:00
perf power/perf/hv-24x7: Use kmem_cache_free() instead of kfree 2014-12-12 16:06:13 +11:00
platforms powerpc: Replace cpumask_weight(cpu_possible_mask) with num_possible_cpus() 2015-01-23 14:02:51 +11:00
sysdev powerpc: Replace cpumask_weight(cpu_possible_mask) with num_possible_cpus() 2015-01-23 14:02:51 +11:00
xmon powerpc/xmon: use isspace/isxdigit/isalnum from linux/ctype.h 2014-12-29 15:45:43 +11:00
Kconfig gcov: enable GCOV_PROFILE_ALL from ARCH Kconfigs 2014-12-13 12:42:51 -08:00
Kconfig.debug Patch queue for ppc - 2014-08-01 2014-08-05 09:58:11 +02:00
Makefile powerpc: Add POWER8 CPU selection 2014-09-25 23:14:49 +10:00
relocs_check.pl