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Kernel panic with hardened kernel 3.17.7-r1 and ZFS 0.6.3-r1
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Tatsh
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PostPosted: Wed Mar 04, 2015 3:55 am    Post subject: Kernel panic with hardened kernel 3.17.7-r1 and ZFS 0.6.3-r1 Reply with quote

Anyone seen this? And is there just something security related (PaX) in the kernel I need to disable? I disabled all the ones that Portage tells me to but maybe there are even more? Or maybe something to enable?

Panic (I could not get a text copy): https://i.imgur.com/pjNaHV7.jpg

I've considered switching back to non-hardened just to see what happens, but not yet.

Bug report is here https://bugs.gentoo.org/show_bug.cgi?id=542054
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Hu
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PostPosted: Wed Mar 04, 2015 4:29 am    Post subject: Reply with quote

The backtrace seems to blame zfs. Can you reproduce with an untainted kernel?
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Tatsh
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PostPosted: Wed Mar 04, 2015 4:42 am    Post subject: Reply with quote

By untainted you mean use gentoo-sources? I was going to do that but then I decided to build the 9999 versions of ZFS and dependencies. Nothing wrong so far (had to import and upgrade). No panics, tons of data copied. Still going...
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mrbassie
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PostPosted: Wed Mar 04, 2015 2:19 pm    Post subject: Reply with quote

From zfsonlinux.org FAQ:
Code:
The kernel API changes frequently, version 0.6.3 supports 2.6.26 - 3.16


Try an older kernel.
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Hu
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PostPosted: Thu Mar 05, 2015 3:10 am    Post subject: Reply with quote

No, I mean a kernel not tainted by loading Proprietary and/or Out-of-tree modules. The kernel records events that can indicate that a future crash is the consequence of prior problems. Some out-of-tree modules are notorious for their reliability problems, so the kernel flags any report that happened with such a module loaded.
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Tatsh
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PostPosted: Thu Mar 05, 2015 3:21 am    Post subject: Reply with quote

I got a response from ryao in IRC that the bug is known, but is rare too. It is on his TODO list to backport the fix. So I will live on 9999 for now.
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