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[bug #46707] double free when kernel does not match secure boot key
From: |
Linus Torvalds |
Subject: |
[bug #46707] double free when kernel does not match secure boot key |
Date: |
Thu, 17 Dec 2015 23:18:27 +0000 |
User-agent: |
Mozilla/5.0 (X11; Fedora; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.106 Safari/537.36 |
URL:
<http://savannah.gnu.org/bugs/?46707>
Summary: double free when kernel does not match secure boot
key
Project: GNU GRUB
Submitted by: torvalds
Submitted on: Thu 17 Dec 2015 11:18:26 PM GMT
Category: Booting
Severity: Major
Priority: 5 - Normal
Item Group: Software Error
Status: None
Privacy: Public
Assigned to: None
Originator Name: Linus Torvalds
Originator Email: address@hidden
Open/Closed: Open
Discussion Lock: Any
Release:
Release: 2.02~beta1
Reproducibility: Every Time
Planned Release: None
_______________________________________________________
Details:
I already submitted this to the Fedora bugzilla, since it happens wioth the
F23 grub, which seems to be based on some 2.02 prerelease.
It may be Fedora-specific, but since I tend to try making upstream reports
too, here goes..
When I installed Fedora 23 on my new desktop machine everything worked fine. I
then built my own kernel (of course), and tried to boot it, but I never got
into the kernel, because grub2 failed with:
double free at 0x616f5760
Aborted. Press any key to edit.
which is not very helpful, and is obviously a Grub bug.
However, booting the *Fedora* kernel worked fine, so I screatched my head for
a while, and then realized that I had never touched the BIOS secure boot
settings - and I don't sign my kernels with some silly vendor signature.
And sure enough, when I disable secure boot, Grub2 works fine.
So clearly Grub2 does not handle secure boot key failures very gracefully. I
don't expect you to actually boot the kernel, but I would expect a useful
error message, rather than a bug about double free's. Something like
Not able to boot unsigned kernel in secure mode.
Aborted. Press any key to edit.
..and hey, if this is all just the Fedora version of Grub2, you can ignore
this bug report, of course.
_______________________________________________________
Reply to this item at:
<http://savannah.gnu.org/bugs/?46707>
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Linus Torvalds <=