Frederic Weisbecker c2c5d45d46 perf: Stop stack frame walking off kernel addresses boundaries ...

While processing kernel perf callchains, an bad entry can be
considered as a valid stack pointer but not as a kernel address.

In this case, we hang in an endless loop. This can happen in an
x86-32 kernel after processing the last entry in a kernel
stacktrace.

Just stop the stack frame walking after we encounter an invalid
kernel address.

This fixes a hard lockup in x86-32.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1262227945-27014-1-git-send-regression-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2010-01-13 09:32:54 +01:00

..

alpha

alpha: Convert BUG() to use unreachable()

2009-12-18 01:14:52 -05:00

arm

Merge master.kernel.org:/home/rmk/linux-2.6-arm

2010-01-12 20:56:01 -08:00

avr32

Merge branch 'for-33' of git://repo.or.cz/linux-kbuild

2009-12-17 07:23:42 -08:00

blackfin

blackfin,kgdb: Do not put PC in gdb_regs into retx.

2010-01-07 11:58:37 -06:00

cris

Merge branch 'for-33' of git://repo.or.cz/linux-kbuild

2009-12-17 07:23:42 -08:00

frv

FDPIC: Respect PT_GNU_STACK exec protection markings when creating NOMMU stack

2010-01-06 18:16:02 -08:00

h8300

Merge branch 'for-33' of git://repo.or.cz/linux-kbuild

2009-12-17 07:23:42 -08:00

ia64

[IA64] move fnptr definition inside #ifdef __KERNEL__

2010-01-08 10:53:28 -08:00

m32r

elf: kill USE_ELF_CORE_DUMP

2009-12-16 07:20:12 -08:00

m68k

m68knommu: fix definitions of __pa() and __va()

2010-01-12 20:51:45 -08:00

m68knommu

Unify sys_mmap*

2009-12-11 06:44:29 -05:00

microblaze

Merge branch 'for-33' of git://repo.or.cz/linux-kbuild

2009-12-17 07:23:42 -08:00

mips

MIPS: Ignore vmlinux.*

2010-01-12 18:19:38 +01:00

mn10300

mn10300: update the ASB2303 defconfig

2010-01-11 09:34:10 -08:00

parisc

Merge branch 'for-33' of git://repo.or.cz/linux-kbuild

2009-12-17 07:23:42 -08:00

powerpc

zlib: optimize inffast when copying direct from output

2010-01-11 09:34:04 -08:00

s390

[S390] Update default configuration.

2010-01-04 09:05:58 +01:00

score

mm: make totalhigh_pages unsigned long

2010-01-11 09:34:03 -08:00

sh

sh: update defconfigs.

2010-01-04 15:38:50 +09:00

sparc

sparc64: Fix Niagara2 perf event handling.

2010-01-04 23:16:03 -08:00

um

Merge branch 'for-33' of git://repo.or.cz/linux-kbuild

2009-12-17 07:23:42 -08:00

x86

perf: Stop stack frame walking off kernel addresses boundaries

2010-01-13 09:32:54 +01:00

xtensa

Merge branch 'for-33' of git://repo.or.cz/linux-kbuild

2009-12-17 07:23:42 -08:00

.gitignore

…

Kconfig

hw-breakpoints: Fix hardware breakpoints -> perf events dependency

2009-12-18 13:11:51 +01:00