Date: Mon, 25 Jun 2018 19:50:46 +0200 From: Solar Designer <solar@...nwall.com> To: owl-dev@...ts.openwall.com Cc: Vasily Averin <vvs@...tuozzo.com> Subject: Re: 32-bit syscall breakage in -431 kernel with KAISER On Mon, Jun 25, 2018 at 07:29:42PM +0200, Pavel Kankovsky wrote: > On Sun, 24 Jun 2018, Solar Designer wrote: > > >My preliminary analysis suggests that maybe the KAISER backport broke > >the pt_regs ABI for 32-bit syscalls in x86_64 kernels. Specifically, > >SIOCGIFCONF might be failing with EFAULT because fs/compat_ioctl.c: > >dev_ifconf() uses compat_alloc_user_space(): > > Yes. It fails because compat_alloc_user_space returns NULL. Thanks! How exactly did you debug this, on which kernel/build? Alexander
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