[mosh-users] mosh-server fails to start on grsecurity kernel

[Deven Lahoti]

Neither strace nor gdb will give me a backtrace, since they both lose track
of it when it forks, but the failure happens after forking. For some
reason, systemd says that coredumps are disabled for the process, so I
can't get one of those either.
On Jun 7, 2016 00:31, "Alex Chernyakhovsky" <achernya at mit.edu> wrote:

> Unfortunately, that's not much to go on. Could you grab the core file
> and get a backtrace? I'm assuming some syscall (probably malloc?)
> failed.
>
> Sincerely,
> -Alex
>
> On Tue, Jun 7, 2016 at 12:18 AM, Deven Lahoti <deywos at mit.edu> wrote:
> > I don't think that's the problem, since it's now giving me:
> > mosh-server[21489]: segfault at 0 ip           (null) sp 00007fffffffcbd8
> > error 14 in mosh-server[555555554000+60000]
> >
> > On Mon, Jun 6, 2016 at 11:42 PM, Alex Chernyakhovsky <achernya at mit.edu>
> > wrote:
> >>
> >> I think the offending line is
> >>
> >> Jun 06 22:32:19 <hostname> kernel: PAX: From 18.X.X.X: execution
> >> attempt in: (null), 00000000-00000000 00000000
> >> Jun 06 22:32:19 <hostname> kernel: PAX: terminating task:
> >> /usr/bin/mosh-server(mosh-server):12505, uid/euid: XXXX/XXXX, PC:
> >>       (nil), SP: 000003844385a508
> >>
> >> mosh-server needs to fork and exec to start subprocesses, and your
> >> kernel/configuration doesn't consider mosh-server to be in the
> >> whitelist.
> >>
> >> Sincerely,
> >> -Alex
> >>
> >>
> >> On Mon, Jun 6, 2016 at 11:30 PM, Deven Lahoti <deywos at mit.edu> wrote:
> >> > Hi, when trying to connect to my machine running Gentoo Hardened on
> >> > kernel
> >> > 4.4.8, mosh-server fails to start. Here are the logs (modified to
> remove
> >> > personal info) [http://web.mit.edu/deywos/www/mosh.log]. I'm not
> really
> >> > sure
> >> > what the problem is, and I don't know much about how mosh works, so I
> >> > was
> >> > hoping someone here could help me out.
> >> >
> >> > Thanks,
> >> > Deven
> >> >
> >> > _______________________________________________
> >> > mosh-users mailing list
> >> > mosh-users at mit.edu
> >> > http://mailman.mit.edu/mailman/listinfo/mosh-users
> >> >
> >
> >
>
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