Arnd Bergmann 525ea118ba ARM: prevent tracing IPI_CPU_BACKTRACE ...

[ Upstream commit be167862ae ]

Patch series "compiler: allow all arches to enable
CONFIG_OPTIMIZE_INLINING", v3.

This patch (of 11):

When function tracing for IPIs is enabled, we get a warning for an
overflow of the ipi_types array with the IPI_CPU_BACKTRACE type as
triggered by raise_nmi():

  arch/arm/kernel/smp.c: In function 'raise_nmi':
  arch/arm/kernel/smp.c:489:2: error: array subscript is above array bounds [-Werror=array-bounds]
    trace_ipi_raise(target, ipi_types[ipinr]);

This is a correct warning as we actually overflow the array here.

This patch raise_nmi() to call __smp_cross_call() instead of
smp_cross_call(), to avoid calling into ftrace.  For clarification, I'm
also adding a two new code comments describing how this one is special.

The warning appears to have shown up after commit e7273ff49a ("ARM:
8488/1: Make IPI_CPU_BACKTRACE a "non-secure" SGI"), which changed the
number assignment from '15' to '8', but as far as I can tell has existed
since the IPI tracepoints were first introduced.  If we decide to
backport this patch to stable kernels, we probably need to backport
e7273ff49a as well.

[yamada.masahiro@socionext.com: rebase on v5.1-rc1]
Link: http://lkml.kernel.org/r/20190423034959.13525-2-yamada.masahiro@socionext.com
Fixes: e7273ff49a ("ARM: 8488/1: Make IPI_CPU_BACKTRACE a "non-secure" SGI")
Fixes: 365ec7b173 ("ARM: add IPI tracepoints") # v3.17
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: Mathieu Malaterre <malat@debian.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Stefan Agner <stefan@agner.ch>
Cc: Boris Brezillon <bbrezillon@kernel.org>
Cc: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Marek Vasut <marek.vasut@gmail.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Borislav Petkov <bp@suse.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2019-06-15 11:54:51 +02:00

..

.gitignore

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arch_timer.c

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armksyms.c

ARM: implement memset32 & memset64

2017-09-08 18:26:48 -07:00

asm-offsets.c

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atags_compat.c

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atags_parse.c

ARM: fix rd_size declaration

2017-07-10 16:32:34 -07:00

atags_proc.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

atags.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

bios32.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

bugs.c

ARM: clean up per-processor check_bugs method call

2019-02-20 10:20:47 +01:00

cpuidle.c

ARM: Convert to using %pOF instead of full_name

2017-08-16 22:25:30 +02:00

crash_dump.c

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debug.S

ARM: 8704/1: semihosting: use proper instruction on v7m processors

2017-10-12 11:28:29 +01:00

devtree.c

ARM: Convert to using %pOF instead of full_name

2017-08-16 22:25:30 +02:00

dma-isa.c

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dma.c

…

early_printk.c

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efi.c

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elf.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

entry-armv.S

Merge branches 'fixes' and 'misc' into for-linus

2017-09-09 16:34:41 +01:00

entry-common.S

ARM: 8781/1: Fix Thumb-2 syscall return for binutils 2.29+

2019-03-13 14:03:23 -07:00

entry-ftrace.S

ARM: 8678/1: ftrace: Adds support for CONFIG_DYNAMIC_FTRACE_WITH_REGS

2017-06-18 22:25:16 +01:00

entry-header.S

ARM: 8830/1: NOMMU: Toggle only bits in EXC_RETURN we are really care of

2019-04-05 22:31:37 +02:00

entry-v7m.S

ARM: 8830/1: NOMMU: Toggle only bits in EXC_RETURN we are really care of

2019-04-05 22:31:37 +02:00

fiq.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

fiqasm.S

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ftrace.c

ARM: 8678/1: ftrace: Adds support for CONFIG_DYNAMIC_FTRACE_WITH_REGS

2017-06-18 22:25:16 +01:00

head-common.S

ARM: make lookup_processor_type() non-__init

2019-02-20 10:20:46 +01:00

head-nommu.S

ARM: 8649/2: nommu: remove Hivecs configuration is asm

2017-02-28 11:06:15 +00:00

head.S

ARM: align .data section

2017-08-14 16:22:55 +01:00

hibernate.c

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hw_breakpoint.c

ARM/hw_breakpoint: Fix possible recursive locking for arch_hw_breakpoint_init

2017-06-20 12:25:22 +02:00

hyp-stub.S

ARM: align .data section

2017-08-14 16:22:55 +01:00

insn.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

io.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

irq.c

ARM: 8824/1: fix a migrating irq bug when hotplug cpu

2019-03-23 14:35:14 +01:00

isa.c

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iwmmxt.S

ARM: align .data section

2017-08-14 16:22:55 +01:00

jump_label.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

kgdb.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

machine_kexec.c

ARM: avoid Cortex-A9 livelock on tight dmb loops

2019-04-05 22:31:37 +02:00

Makefile

ARM: bugs: prepare processor bug infrastructure

2018-10-18 09:16:26 +02:00

module-plts.c

ARM: 8662/1: module: split core and init PLT sections

2017-03-17 10:01:28 +00:00

module.c

ARM: Silence first allocation with CONFIG_ARM_MODULE_PLTS=y

2017-05-11 14:43:31 +01:00

module.lds

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

opcodes.c

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paravirt.c

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patch.c

ARM: 8839/1: kprobe: make patch_lock a raw_spinlock_t

2019-04-20 09:15:07 +02:00

perf_callchain.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

perf_event_v6.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

perf_event_v7.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

perf_event_xscale.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

perf_regs.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

pj4-cp0.c

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process.c

ARM: 8683/1: ARM32: Support mremap() for sigpage/vDSO

2017-06-21 13:02:58 +01:00

psci_smp.c

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ptrace.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>

2017-03-02 08:42:36 +01:00

reboot.c

ARM: soft-reboot into same mode that we entered the kernel

2017-04-09 07:49:24 -07:00

reboot.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

relocate_kernel.S

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

return_address.c

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setup.c

ARM: spectre-v2: per-CPU vtables to work around big.Little systems

2019-02-20 10:20:47 +01:00

signal.c

ARM: 8793/1: signal: replace __put_user_error with __put_user

2019-02-20 10:20:45 +01:00

sigreturn_codes.S

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sleep.S

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

smccc-call.S

arm: kernel: Add SMC structure parameter

2017-02-03 18:46:33 +00:00

smp_scu.c

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smp_tlb.c

ARM: 8613/1: Fix the uaccess crash on PB11MPCore

2017-01-16 17:30:46 +00:00

smp_twd.c

clocksource/drivers: Rename CLOCKSOURCE_OF_DECLARE to TIMER_OF_DECLARE

2017-06-14 11:58:45 +02:00

smp.c

ARM: prevent tracing IPI_CPU_BACKTRACE

2019-06-15 11:54:51 +02:00

stacktrace.c

ARM: 8691/1: Export save_stack_trace_tsk()

2017-09-09 16:26:42 +01:00

suspend.c

ARM: bugs: hook processor bug checking into SMP and suspend paths

2018-10-18 09:16:26 +02:00

swp_emulate.c

sched/headers: Prepare to remove the <linux/mm_types.h> dependency from <linux/sched.h>

2017-03-02 08:42:37 +01:00

sys_arm.c

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sys_oabi-compat.c

ARM: 8792/1: oabi-compat: copy oabi events using __copy_to_user()

2019-02-20 10:20:45 +01:00

tcm.c

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thumbee.c

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time.c

clocksource/drivers: Rename clocksource_probe to timer_probe

2017-06-14 11:59:16 +02:00

topology.c

ARM: Convert to using %pOF instead of full_name

2017-08-16 22:25:30 +02:00

traps.c

ARM: 8771/1: kprobes: Prohibit kprobes on do_undefinstr

2018-05-22 18:54:00 +02:00

unwind.c

ARM: 8840/1: use a raw_spinlock_t in unwind

2019-04-05 22:31:30 +02:00

v7m.c

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vdso.c

ARM: 8748/1: mm: Define vdso_start, vdso_end as array

2018-05-30 07:52:20 +02:00

vmlinux-xip.lds.S

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

vmlinux.lds.S

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

xscale-cp0.c

…