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James Hogan 8542363633 MIPS: Avoid accidental raw backtrace ... Since commit 81a76d7119 ("MIPS: Avoid using unwind_stack() with usermode") show_backtrace() invokes the raw backtracer when cp0_status & ST0_KSU indicates user mode to fix issues on EVA kernels where user and kernel address spaces overlap. However this is used by show_stack() which creates its own pt_regs on the stack and leaves cp0_status uninitialised in most of the code paths. This results in the non deterministic use of the raw back tracer depending on the previous stack content. show_stack() deals exclusively with kernel mode stacks anyway, so explicitly initialise regs.cp0_status to KSU_KERNEL (i.e. 0) to ensure we get a useful backtrace. Fixes: 81a76d7119 ("MIPS: Avoid using unwind_stack() with usermode") Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: linux-mips@linux-mips.org Cc: <stable@vger.kernel.org> # 3.15+ Patchwork: https://patchwork.linux-mips.org/patch/16656/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>		8 years ago
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alchemy	…
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boot	MIPS: .its targets depend on vmlinux	8 years ago
cavium-octeon	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	8 years ago
cobalt	…
configs	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	8 years ago
dec	format-security: move static strings to const	8 years ago
emma	…
fw	…
generic	…
include	MIPS: kprobes: flush_insn_slot should flush only if probe initialised	8 years ago
jazz	…
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kernel	MIPS: Avoid accidental raw backtrace	8 years ago
kvm	KVM: MIPS: Fix maybe-uninitialized build failure	8 years ago
lantiq	…
lasat	…
lib	…
loongson32	…
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math-emu	MIPS: math-emu: Handle zero accumulator case in MADDF and MSUBF separately	8 years ago
mm	MIPS: Perform post-DMA cache flushes on systems with MAARs	8 years ago
mti-malta	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	8 years ago
net	…
netlogic	…
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pci	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	8 years ago
pic32	…
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pmcs-msp71xx	…
pnx833x	…
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Kconfig	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	8 years ago
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