Re: WARNING in __check_heap_object

2017-11-08 Thread Dmitry Vyukov
On Wed, Nov 8, 2017 at 8:02 PM, Kees Cook wrote: >>> On Tue, Nov 7, 2017 at 10:36 AM, syzbot >>> >>> wrote: Hello, syzkaller hit the following crash on 5a3517e009e979f21977d362212b7729c5165d92 git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master c

Re: WARNING in __check_heap_object

2017-11-08 Thread Kees Cook
On Wed, Nov 8, 2017 at 12:23 AM, Dmitry Vyukov wrote: > On Tue, Nov 7, 2017 at 9:35 PM, Kees Cook wrote: >> On Tue, Nov 7, 2017 at 10:36 AM, syzbot >> >> wrote: >>> Hello, >>> >>> syzkaller hit the following crash on >>> 5a3517e009e979f21977d362212b7729c5165d92 >>> git://git.kernel.org/pub/scm/l

Re: WARNING in __check_heap_object

2017-11-08 Thread Dmitry Vyukov
On Tue, Nov 7, 2017 at 9:35 PM, Kees Cook wrote: > On Tue, Nov 7, 2017 at 10:36 AM, syzbot > > wrote: >> Hello, >> >> syzkaller hit the following crash on >> 5a3517e009e979f21977d362212b7729c5165d92 >> git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master >> compiler: gcc (GCC)

Re: WARNING in __check_heap_object

2017-11-07 Thread Kees Cook
On Tue, Nov 7, 2017 at 10:36 AM, syzbot wrote: > Hello, > > syzkaller hit the following crash on > 5a3517e009e979f21977d362212b7729c5165d92 > git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master > compiler: gcc (GCC) 7.1.1 20170620 > .config is attached > Raw console output is

Re: WARNING in __check_heap_object

2017-11-07 Thread Christopher Lameter
Well that is a security thingamy related to CONFIG_HARDDENED_USERCOPY. Kees? - Offending function #ifdef CONFIG_HARDENED_USERCOPY /* * Rejects objects that are incorrectly sized. * * Returns NULL if check passes, otherwise const char * to name of cache * to indicate an error. */ const char