Hi Will, On Fri, Dec 15, 2017 at 3:27 PM, Will Deacon <will.deacon@xxxxxxx> wrote: > On Fri, Dec 15, 2017 at 02:30:00PM +0100, Geert Uytterhoeven wrote: >> On Fri, Dec 15, 2017 at 12:23 PM, Dave Martin <Dave.Martin@xxxxxxx> wrote: >> > The two important differences here seem to be >> > >> > 1) Staging the state via current->thread.fpsimd_state instead of loading >> > directly: >> > >> > - fpsimd_load_state(state); >> > + current->thread.fpsimd_state = *state; >> > + fpsimd_load_state(¤t->thread.fpsimd_state); >> >> The change above introduces the breakage. > > I finally managed to reproduce this, but only by using the exact same > compiler as Geert: > > https://www.kernel.org/pub/tools/crosstool/files/bin/x86_64/4.9.0/x86_64-gcc-4.9.0-nolibc_aarch64-linux.tar.xz > > I then reliably see the problem if I run: > > # /usr/bin/update-ca-certificates /usr/sbin/... ? > from Debian Jessie. Funny, I've just got both *** Error in `/bin/sh': free(): invalid pointer: 0x0000aaaac17d4988 *** and mountall.sh[2172]: unhandled level 0 translation fault (11) at 0x0000004d, esr 0x92000004, in dash[aaaace7e5000+1a000] during boot up, but I can't get update-ca-certificates to fail... 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
