Date: Fri, 29 Jun 2018 18:41:24 +0200 From: Solar Designer <solar@...nwall.com> To: Vasily Averin <vvs@...tuozzo.com> Cc: owl-dev@...ts.openwall.com Subject: Re: 32-bit syscall breakage in -431 kernel with KAISER Vasily, On Fri, Jun 29, 2018 at 07:08:02PM +0300, Vasily Averin wrote: > On 06/28/2018 05:11 PM, Vasily Averin wrote: > > On my test node I observe strange exception right on boot of 64-bit kernel, > > it is not handles properly and writes 0 into EIP and it crashes the kernel. > > > > So I'm going to troubloeshoot qemu with gdb, hope it helps tofind the resoun of the trouble. > > I have stable reproducer, but even with single-step and hardware breakpoints I still cannot intercept this mysterious exception. > it adds an extra frame on regular stack, changes EIP to 0, then generates page_fault an crashes. > > Alexander, > could you please drop me your config for 64bit kernel? You can get our kernel configs here: http://cvsweb.openwall.com/cgi/cvsweb.cgi/Owl/packages/kernel/ Meanwhile, Chris who reported the problem on owl-users has confirmed that Pavel's fix works for him. Alexander
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