On Fri, Aug 9, 2013 at 2:30 PM, Andreas Schwab <sch...@linux-m68k.org> wrote: > Andreas Schwab <sch...@linux-m68k.org> writes: >> Josef Bacik <jba...@fusionio.com> writes: >>> So stripe_len shouldn't be 0, if it is you have bigger problems :).
[ lost context: this is about the first do_div() in __btrfs_map_block() ] >> The bigger problem is that stripe_nr is u64, this is completely bogus. >> The first operand of do_div must be u32. This goes through the whole >> file. > > Of course, what I meant was that the *second* operand must be u32, but > that doesn't change my point. I checked all do_div() implementations, and (unless I missed one) m68k and mn10300 were the only two that didn't truncate base to 32 bits. Mn10300 is little endian, so I think the problem won't happen there. Andreas, I'll apply your patch (http://permalink.gmane.org/gmane.linux.ports.m68k/5008) with the crash log added to the commit message, so it's appropriate for -stable. 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
