I have found another issue with the 4.4 KVM kernel, bug 1769054
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https://bugs.launchpad.net/bugs/1764980
Title:
test_095_kernel_symbols_missing_proc_modules failed
OK,
since we already have this fixed in the qa-regression-testing repo and there is
no specific request from the security team, I will just leave it as-is.
Thanks for fixing this.
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Hi Po-Hsu,
Thanks for double-checking, that's appreciated! The security team does
not have an opinion on whether CONFIG_KALLSYMS and CONFIG_KALLSYMS_ALL
should be enabled, from a security/hardening standpoint. It may be
useful from the kernel team's perspective, to make debugging kernel oops
bug
The test kernel can be found here:
http://people.canonical.com/~phlin/kernel/lp-1764980/
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https://bugs.launchpad.net/bugs/1764980
Title:
Test result without CONFIG_KALLSYMS and CONFIG_KALLSYMS_ALL enabled:
ubuntu@gummo:~$ sudo cat /proc/modules
signpost 12288 - - Live 0x (OE)
fuse 77824 - - Live 0x
kvm_intel 180224 - - Live 0x
btrfs 819200 - - Live 0x
xor 20480 - -
Po-Hsu, sure, that would be great if you could build and test a kernel
with CONFIG_KALLSYMS to check that that's actually the config option
that is causing the behavior. Thanks!
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I've now added a check for whether CONFIG_KALLSYMS is enabled in the
running kernel and adjusted the expected test results based on that, in
qrt commit https://git.launchpad.net/qa-regression-
testing/commit/?id=cde457932459a525c75126db8a8d4b7262d4da24 . This
should address this failing test case,
I have checked the kernel config for 4.15 linux-kvm, it's true that:
# CONFIG_KALLSYMS is not set
Do you want me to test it with the config enabled? I can build a test
kernel for this.
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I've reproduced this with the 4.15 linux-kvm kernel. I'm not sure why
it's doing this, though:
ubuntu@sec-bionic-amd64:~$ sudo cat /proc/modules
kvm_intel 200704 - - Live 0x
pata_acpi 12288 - - Live 0x
ubuntu@sec-bionic-amd64:~$ cat /proc/version_signature
Hi Po-Hsu,
I'm not sure why this test is failing on linux-kvm. I've modified the
test in question to dump the contents of /proc/modules when the test
fails in qrt commit https://git.launchpad.net/qa-regression-
testing/commit/?id=b47b677b9f99af9539558044ccdb9b4769f1732e ; if we can
get a re-run
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: Incomplete
** Also affects: linux-kvm (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Bionic)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu Bionic)
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