On Wed, Nov 1, 2017 at 10:26 PM, Willy Tarreau <w...@1wt.eu> wrote: > From: Helge Deller <del...@gmx.de> > > commit 37511fb5c91db93d8bd6e3f52f86e5a7ff7cfcdf upstream. > > Jörn Engel noticed that the expand_upwards() function might not return
Jörn (yeah, the original commit suffers from this, too ;-) > -ENOMEM in case the requested address is (unsigned long)-PAGE_SIZE and > if the architecture didn't defined TASK_SIZE as multiple of PAGE_SIZE. > > Affected architectures are arm, frv, m68k, blackfin, h8300 and xtensa > which all define TASK_SIZE as 0xffffffff, but since none of those have > an upwards-growing stack we currently have no actual issue. > > Nevertheless let's fix this just in case any of the architectures with > an upward-growing stack (currently parisc, metag and partly ia64) define > TASK_SIZE similar. > > Link: http://lkml.kernel.org/r/20170702192452.ga11...@p100.box > Fixes: bd726c90b6b8 ("Allow stack to grow up to address space limit") > Signed-off-by: Helge Deller <del...@gmx.de> > Reported-by: Jörn Engel <jo...@purestorage.com> > Cc: Hugh Dickins <hu...@google.com> > Cc: Oleg Nesterov <o...@redhat.com> > Cc: <sta...@vger.kernel.org> > Signed-off-by: Andrew Morton <a...@linux-foundation.org> > Signed-off-by: Linus Torvalds <torva...@linux-foundation.org> > Signed-off-by: Willy Tarreau <w...@1wt.eu> Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
