Hi Wolfram, Thanks for your patch! On Tue, Apr 16, 2024 at 2:35 PM Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx> wrote: > In the RX DMA completion handler, the hrtimer was restarted before DMA > was set up. If DMA failed, for some reason, it would clean up and the > hrtimer would run into a NULL-pointer. Restart the timer after DMA was ... into a NULL-pointer dereference of s->chan_rx. > successfully set up. > > Reported-by: Dirk Behme <dirk.behme@xxxxxxxxxxxx> > Closes: https://lore.kernel.org/r/ee6c9e16-9f29-450e-81da-4a8dceaa8fc7@xxxxxxxxxxxx > Fixes: 67f462b069e9 ("serial: sh-sci: Get rid of the workqueue to handle receive DMA requests") > Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx> This is definitely a step in the right direction, so Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> 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
