The bug for GCP n2d-standard-4.sev_snp can be tracked in bug 2051378
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https://bugs.launchpad.net/bugs/2034057
Title:
function_graph tracer in ftrace related tests
This is also been seen on j/gcp-fips with version 5.15.0-1048.56+fips1
during development cycle d2024.01.02 on the n2d-standard-4.sev_snp
instance. If necessary, another bug could be filed targeting GCP
specifically.
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Ubuntu 23.04 (Lunar Lobster) has reached end of life, so this bug will
not be fixed for that specific release.
** Changed in: linux-aws (Ubuntu Lunar)
Status: New => Won't Fix
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It seems the crash happens in the dummy handler for an interrupt that is used
for the unlock of a paravirtualized spinlock. It is set when a vcpu is
initialized but then the interrupt is disabled. So I assume an interrupt
happens between request_irq and disable_irq.
I tried 2 things on jammy
And this is affecting 4.15 AWS as well. Here is the output from
b-aws-4.15-2099
Test output:
+ echo blk
+ echo mmiotrace
+ echo function_graph
(Test interrupted here)
dmesg:
[ 216.814155] kernel BUG at
/build/linux-aws-fips-hcslsq/linux-aws-fips-4.15.0/arch/x86/xen/spinlock.c:69!
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