Hi Finn,
On Wed, Apr 19, 2023 at 12:53 PM Finn Thain <fthain@xxxxxxxxxxxxxx> wrote:
Inspired by your observation about the page fault and stack growth, I
wrote a small test program (given below) that just pushes registers onto
the stack recursively while forking processes and collecting the SIGCHLD
signals.
On a Motorola '030 the stack grows to about 7 MiB before it gets
corrupted. The program detects the stack corruption and terminates
immediately with an illegal instruction. Oddly, the program never detects
any stack corruption when run on the QEMU '040.
Nice! (the reproducer, not the bug ;-)
Does it also fail on a very old kernel image you still have lying around?
Just to rule out a recent kernel bug.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
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
