Bug 589154 – sys-kernel/hardened-sources-4.6.4-r1 unable to boot

• Status: RESOLVED FIXED
• Product: Gentoo Linux

[Description Alexander Stoll 2016-07-19 16:07:23 UTC]

Well, this is some kind of summarized feedback on the real bumpy ride related to the 4.6 kernel series - hopefully helpful and some specific to 4.6.4-r1.

- early 4.6 releases until 4.6.3-r1 won´t boot on x86 box, early panic

- 4.6.3-r1 panics on x86 related to pppd when DSL is pulled on modem

- 4.6.4 on amd64 box panics on shutdown to reboot

- 4.6.4-r1 on amd64 box panics shortly after boot on login via ssh

- fallback to 4.5 on all boxes restores normal operation

- as far as noticed (some are headless), all panics were related to spinlock on the terminal

No 4.6 revision has ran flawlessly on any box so far.

If needed, I will give further details.

[Comment 1 Dmitriy Baranov 2016-07-19 17:10:36 UTC]

I confirm this. Kernel freezes after setting my net. 4.6.4-r1 freezes but 4.6.4 works normal for me.

[Comment 2 Anthony Basile 2016-07-19 17:53:24 UTC]

(In reply to reagentoo from comment #1)
> I confirm this. Kernel freezes after setting my net. 4.6.4-r1 freezes but
> 4.6.4 works normal for me.

*sigh*  I'll pass it upstream.

[Comment 3 PaX Team 2016-07-19 19:15:04 UTC]

getting your configs and some output from the kernel would be helpful. also if you try the latest grsec patch then either disable size overflow or boot with pax_size_overflow_report_only for now.

[Comment 4 Dmitriy Baranov 2016-07-19 20:06:32 UTC]

Created attachment 441154 [details]
kernel-config-x86_64-4.6.4-hardened-r1

my kernel config

[Comment 5 Dmitriy Baranov 2016-07-19 20:07:31 UTC]

Created attachment 441158 [details]
dmesg

dmesg out with pax_size_overflow_report_only

[Comment 6 Anthony Basile 2016-07-20 09:59:44 UTC]

*** Bug 588700 has been marked as a duplicate of this bug. ***

[Comment 7 Markus Walter 2016-07-20 10:09:15 UTC]

I'm not too sure, that my bug 588700 actually is a duplicate of this, since it occurred before 4.6 and involves a different error (not a size overflow but an inability to handle a kernel paging request).

[Comment 8 Alexander Stoll 2016-07-20 14:16:45 UTC]

Created attachment 441214 [details]
Kernel Log after ssh login

ssh login triggers the overflow

[Comment 9 Alexander Stoll 2016-07-20 14:22:19 UTC]

Created attachment 441216 [details]
Testbox kernel config

[Comment 10 Anthony Basile 2016-07-21 16:28:16 UTC]

(In reply to Markus Oehme from comment #7)
> I'm not too sure, that my bug 588700 actually is a duplicate of this, since
> it occurred before 4.6 and involves a different error (not a size overflow
> but an inability to handle a kernel paging request).

okay.  can you test 4.6.4-r2 which I just put on the tree.

@pipacs 4.6.4-r2 = grsecurity-3.1-4.6.4-201607192040

[Comment 11 Markus Walter 2016-07-21 17:32:54 UTC]

(In reply to Anthony Basile from comment #10)
> okay.  can you test 4.6.4-r2 which I just put on the tree.

I'm now running 4.6.4-r2 and everything looks fine. *thumbs up*