Ubuntu
gcc-12 package

Linux miss-built regression between 12.1.0 and 12.3.0 on amd64

Bug #2031927 reported by Dimitri John Ledkov
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This bug affects 1 person
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gcc-12 (Ubuntu)
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Bug Description

bad:

ii cpp-12 12.3.0-1ubuntu1~22.04
ii gcc-12 12.3.0-1ubuntu1~22.04
ii gcc-12-base:amd64 12.3.0-1ubuntu1~22.04
ii libgcc-12-dev:amd64 12.3.0-1ubuntu1~22.04

good:

ii cpp-12 12.1.0-2ubuntu1~22.04
ii gcc-12 12.1.0-2ubuntu1~22.04
ii gcc-12-base:amd64 12.1.0-2ubuntu1~22.04
ii libgcc-12-dev:amd64 12.1.0-2ubuntu1~22.04

Building linux kernel -1009 gcp with both, causes boot failure on instances that use sev-snp.

More information to follow.

TODO check if gcc-12 in mantic, and gcc-13 in mantic are affected too

Revert request: to immediately unblock kernel team, removing 12.3.0-1ubuntu1~22.04 from jammy-security, and publishing 12.1.0-2ubuntu1~22.04 in jammy-security would immediately unblock working on the kernels that need the above feature working correctly at runtime.

See original description
Dimitri John Ledkov (xnox)
tags: added: regression-update
description: updated
description: updated
Revision history for this message
Dimitri John Ledkov (xnox) wrote :

From changelog:
https://launchpad.net/ubuntu/+source/gcc-12/12.3.0-1ubuntu1~22.04
Appears to be upstream GCC 12.3.0 release (no snapshot)

https://launchpad.net/ubuntu/+source/gcc-12/12.1.0-2ubuntu1~22.04
Appears to be snapshot "Update to git 20210513 from the gcc-12 branch."

Revision history for this message
Dimitri John Ledkov (xnox) wrote :

I think the diff between those two gcc revisions is 33838 files changed, 4163362 insertions(+), 3256529 deletions(-)

Assuming 160a6c31074afde0bfc835591a95653c5e65cc45 commit for gcc that makes bootable kernel, and 8fc1a49c9312b05d925b7d21f1d2145d70818151 commit for gcc that makes failing-to-boot kernel.

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