On Thu, Nov 13, 2014 at 03:06:25PM +0000, Catalin Marinas wrote: > On Wed, Nov 12, 2014 at 09:07:44PM +0000, Kyle McMartin wrote: > > ARM64 currently doesn't fix up faults on the single-byte (strb) case of > > __clear_user... which means that we can cause a nasty kernel panic as an > > ordinary user with any multiple PAGE_SIZE+1 read from /dev/zero. > > i.e.: dd if=/dev/zero of=foo ibs=1 count=1 (or ibs=65537, etc.) > > Thanks for this, it's been like this for a while. Applied. >
Thanks Catalin, if it's not too late, I forgot to add a Reported-by: Miloš Prchlík <mprch...@redhat.com> for the initial report of the panic. regards, Kyle -- 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/
