Re: KASAN: alloca-out-of-bounds Read in unwind_next_frame

2018-04-13 Thread Dmitry Vyukov
On Fri, Apr 6, 2018 at 6:53 PM, Josh Poimboeuf wrote: > On Fri, Apr 06, 2018 at 05:40:01PM +0200, Dmitry Vyukov wrote: >> > So at first glance it seemed like a race condition. However, the >> > unwinder was only trying to dereference the frame pointer (RBP: >> > 8801b05e67f8), which should ha

Re: KASAN: alloca-out-of-bounds Read in unwind_next_frame

2018-04-06 Thread Josh Poimboeuf
On Fri, Apr 06, 2018 at 05:40:01PM +0200, Dmitry Vyukov wrote: > > So at first glance it seemed like a race condition. However, the > > unwinder was only trying to dereference the frame pointer (RBP: > > 8801b05e67f8), which should have never been poisoned in the first > > place. > > > > So it

Re: KASAN: alloca-out-of-bounds Read in unwind_next_frame

2018-04-06 Thread Dmitry Vyukov
On Fri, Apr 6, 2018 at 5:36 PM, Josh Poimboeuf wrote: > On Thu, Apr 05, 2018 at 05:02:02PM -0700, syzbot wrote: >> Hello, >> >> syzbot hit the following crash on upstream commit >> 06dd3dfeea60e2a6457a6aedf97afc8e6d2ba497 (Thu Apr 5 03:07:20 2018 +) >> Merge tag 'char-misc-4.17-rc1' of >> git:

Re: KASAN: alloca-out-of-bounds Read in unwind_next_frame

2018-04-06 Thread Josh Poimboeuf
On Thu, Apr 05, 2018 at 05:02:02PM -0700, syzbot wrote: > Hello, > > syzbot hit the following crash on upstream commit > 06dd3dfeea60e2a6457a6aedf97afc8e6d2ba497 (Thu Apr 5 03:07:20 2018 +) > Merge tag 'char-misc-4.17-rc1' of > git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc > s

Re: KASAN: alloca-out-of-bounds Read in unwind_next_frame

2018-04-06 Thread Dmitry Vyukov
On Fri, Apr 6, 2018 at 2:02 AM, syzbot wrote: > Hello, > > syzbot hit the following crash on upstream commit > 06dd3dfeea60e2a6457a6aedf97afc8e6d2ba497 (Thu Apr 5 03:07:20 2018 +) > Merge tag 'char-misc-4.17-rc1' of > git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc > syzbot dash