Josh Poimboeuf c280f7736a Revert "x86/unwind: Detect bad stack return address" ...

Revert the following commit:

  b6959a3621 ("x86/unwind: Detect bad stack return address")

... because Andrey Konovalov reported an unwinder warning:

  WARNING: unrecognized kernel stack return address ffffffffa0000001 at ffff88006377fa18 in a.out:4467

The unwind was initiated from an interrupt which occurred while running in the
generated code for a kprobe.  The unwinder printed the warning because it
expected regs->ip to point to a valid text address, but instead it pointed to
the generated code.

Eventually we may want come up with a way to identify generated kprobe
code so the unwinder can know that it's a valid return address.  Until
then, just remove the warning.

Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/02f296848fbf49fb72dfeea706413ecbd9d4caf6.1482418739.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2016-12-23 20:32:30 +01:00

..

alpha

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2016-12-14 14:09:48 -08:00

arc

Merge tag 'arc-4.10-rc1-part1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc

2016-12-15 14:15:17 -08:00

arm

Merge tag 'for-linus-20161216' of git://git.infradead.org/linux-mtd

2016-12-17 16:41:10 -08:00

arm64

Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-12-18 11:12:53 -08:00

avr32

arch/avr32: add option to skip sync on DMA map

2016-12-14 16:04:07 -08:00

blackfin

Merge branch 'akpm' (patches from Andrew)

2016-12-14 17:25:18 -08:00

c6x

arch/c6x: add option to skip sync on DMA map and unmap

2016-12-14 16:04:07 -08:00

cris

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2016-12-14 14:09:48 -08:00

frv

arch/frv: add option to skip sync on DMA map

2016-12-14 16:04:07 -08:00

h8300

locking/core: Provide common cpu_relax_yield() definition

2016-11-17 08:17:36 +01:00

hexagon

arch/hexagon: Add option to skip DMA sync as a part of mapping

2016-12-14 16:04:07 -08:00

ia64

Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-12-18 11:12:53 -08:00

m32r

m32r: fix build warning

2016-12-12 18:55:06 -08:00

m68k

arch/m68k: add option to skip DMA sync as a part of mapping

2016-12-14 16:04:07 -08:00

metag

arch/metag: add option to skip DMA sync as a part of map and unmap

2016-12-14 16:04:07 -08:00

microblaze

arch/microblaze: add option to skip DMA sync as a part of map and unmap

2016-12-14 16:04:07 -08:00

mips

Merge tag 'rtc-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux

2016-12-18 18:18:03 -08:00

mn10300

Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-12-12 10:48:02 -08:00

nios2

Merge tag 'nios2-v4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2

2016-12-16 09:33:16 -08:00

openrisc

arch/openrisc: add option to skip DMA sync as a part of mapping

2016-12-14 16:04:07 -08:00

parisc

arch/parisc: add option to skip DMA sync as a part of map and unmap

2016-12-14 16:04:07 -08:00

powerpc

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2016-12-17 18:44:00 -08:00

s390

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

2016-12-16 09:05:25 -08:00

score

locking/core: Provide common cpu_relax_yield() definition

2016-11-17 08:17:36 +01:00

sh

Merge branch 'akpm' (patches from Andrew)

2016-12-14 17:25:18 -08:00

sparc

sparc: implement watchdog_nmi_enable and watchdog_nmi_disable

2016-12-14 16:04:08 -08:00

tile

Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile

2016-12-17 17:05:49 -08:00

um

Merge branch 'for-linus-4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml

2016-12-16 09:35:03 -08:00

unicore32

locking/core: Provide common cpu_relax_yield() definition

2016-11-17 08:17:36 +01:00

x86

Revert "x86/unwind: Detect bad stack return address"

2016-12-23 20:32:30 +01:00

xtensa

arch/xtensa: add option to skip DMA sync as a part of mapping

2016-12-14 16:04:08 -08:00

.gitignore

…

Kconfig

Merge tag 'gcc-plugins-v4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

2016-12-13 09:22:21 -08:00