setarch: arch param should be optional #668

bmwiedemann · 2018-07-25T13:38:41Z

During our (openSUSE package) build processes, I often find places where I need to disable ASLR to make output reproducible .

setarch -R $command

would really be a lot nicer than

setarch `uname -m` -R $command
# which has trouble on ARM, or
setarch `arch` -R $command
# dont know if that is better... maybe not, looking at
setarch i386 arch
i686

bmwiedemann · 2018-07-25T14:42:11Z

setarch-poc.patch.txt

to test I used https://github.com/bmwiedemann/theunreproduciblepackage/blob/master/aslr/2.c

karelzak · 2018-08-06T13:15:58Z

Seems like a good idea -- it's probably mistake that setarch is mostly about execution domains than more commonly about personalities.

Let's allow to change personality flags without execution domain modification. Old way: setarch `arch` --addr-no-randomize myprog New way: setarch --addr-no-randomize myprog Addresses: https://github.com/karelzak/util-linux/issues/668 Signed-off-by: Karel Zak <kzak@redhat.com>

karelzak · 2018-08-07T09:37:27Z

Implemented.

karelzak added the TODO We going to think about it ;-) label Aug 6, 2018

karelzak removed the TODO We going to think about it ;-) label Aug 7, 2018

karelzak closed this as completed Aug 7, 2018

setarch: arch param should be optional #668

setarch: arch param should be optional #668

bmwiedemann commented Jul 25, 2018

bmwiedemann commented Jul 25, 2018 •

edited

karelzak commented Aug 6, 2018

karelzak commented Aug 7, 2018

setarch: arch param should be optional #668

setarch: arch param should be optional #668

Comments

bmwiedemann commented Jul 25, 2018

bmwiedemann commented Jul 25, 2018 • edited

karelzak commented Aug 6, 2018

karelzak commented Aug 7, 2018

bmwiedemann commented Jul 25, 2018 •

edited