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David Ahern b69fb7699c sparc64: perf: Add sanity checking on addresses in user stack 
Processes are getting killed (sigbus or segv) while walking userspace
callchains when using perf. In some instances I have seen ufp = 0x7ff
which does not seem like a proper stack address.

This patch adds a function to run validity checks against the address
before attempting the copy_from_user. The checks are copied from the
x86 version as a start point with the addition of a 4-byte alignment
check.

Signed-off-by: David Ahern <david.ahern@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-06-25 06:01:02 -07:00
..
alpha mm: new mm hook framework 2015-06-24 17:49:41 -07:00
arc mm: new mm hook framework 2015-06-24 17:49:41 -07:00
arm Merge branch 'akpm' (patches from Andrew) 2015-06-24 20:47:21 -07:00
arm64 Merge branch 'akpm' (patches from Andrew) 2015-06-24 20:47:21 -07:00
avr32 mm: new mm hook framework 2015-06-24 17:49:41 -07:00
blackfin mm: new mm hook framework 2015-06-24 17:49:41 -07:00
c6x mm: new mm hook framework 2015-06-24 17:49:41 -07:00
cris mm: new mm hook framework 2015-06-24 17:49:41 -07:00
frv mm: new mm hook framework 2015-06-24 17:49:41 -07:00
hexagon mm: new mm hook framework 2015-06-24 17:49:41 -07:00
ia64 mm/hugetlb: reduce arch dependent code about hugetlb_prefault_arch_hook 2015-06-24 17:49:41 -07:00
m32r mm: new mm hook framework 2015-06-24 17:49:41 -07:00
m68k mm: new mm hook framework 2015-06-24 17:49:41 -07:00
metag mm/hugetlb: reduce arch dependent code about hugetlb_prefault_arch_hook 2015-06-24 17:49:41 -07:00
microblaze mm: new mm hook framework 2015-06-24 17:49:41 -07:00
mips Merge branch 'akpm' (patches from Andrew) 2015-06-24 20:47:21 -07:00
mn10300 mm: new mm hook framework 2015-06-24 17:49:41 -07:00
nios2 mm: new mm hook framework 2015-06-24 17:49:41 -07:00
openrisc mm: new mm hook framework 2015-06-24 17:49:41 -07:00
parisc mm: new mm hook framework 2015-06-24 17:49:41 -07:00
powerpc Merge branch 'akpm' (patches from Andrew) 2015-06-24 20:47:21 -07:00
s390 Merge branch 'akpm' (patches from Andrew) 2015-06-24 20:47:21 -07:00
score mm: new mm hook framework 2015-06-24 17:49:41 -07:00
sh mm/hugetlb: reduce arch dependent code about hugetlb_prefault_arch_hook 2015-06-24 17:49:41 -07:00
sparc sparc64: perf: Add sanity checking on addresses in user stack 2015-06-25 06:01:02 -07:00
tile Merge branch 'akpm' (patches from Andrew) 2015-06-24 20:47:21 -07:00
um mm: new mm hook framework 2015-06-24 17:49:41 -07:00
unicore32 mm: new mm hook framework 2015-06-24 17:49:41 -07:00
x86 Merge branch 'akpm' (patches from Andrew) 2015-06-24 20:47:21 -07:00
xtensa mm: new mm hook framework 2015-06-24 17:49:41 -07:00
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