This bug was fixed in the package libbpf - 1.6.2-1
---------------
libbpf (1.6.2-1) unstable; urgency=medium
* New upstream version 1.6.2
- Update symbols.
-- Sudip Mukherjee <[email protected]> Fri, 22 Aug 2025
12:43:08 +0100
libbpf (1.6.1-1) unstable; urgency=medium
* Upload to unstable.
-- Sudip Mukherjee <[email protected]> Sat, 16 Aug 2025
22:53:11 +0100
libbpf (1.6.1-1~exp1) experimental; urgency=medium
* New upstream version 1.6.1
- Update symbols.
- Remove upstream applied patch.
* Remove old fsf address in d/copyright.
* Update Standards-Version to 4.7.2.
-- Sudip Mukherjee <[email protected]> Sun, 10 Aug 2025
10:29:02 +0100
** Changed in: libbpf (Ubuntu)
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/2122094
Title:
module size bump since 6.15
Status in libbpf package in Ubuntu:
Fix Released
Bug description:
We've seen kernel module size getting larger since 6.15, and this is
due to a deduplication failure in libbpf. This means that the
installed size of modules has gone up from ~160MB to ~270MB.
The fix is:
https://github.com/libbpf/libbpf/commit/c8a28812fbe1af6ff0cbd92edb88c6fcc2291737
libbpf: Add identical pointer detection to btf_dedup_is_equiv()
Recently as a side-effect of
commit ac053946f5c4 ("compiler.h: introduce TYPEOF_UNQUAL() macro")
issues were observed in deduplication between modules and kernel BTF
such that a large number of kernel types were not deduplicated so
were found in module BTF (task_struct, bpf_prog etc). The root cause
appeared to be a failure to dedup struct types, specifically those
with members that were pointers with __percpu annotations.
The issue in dedup is at the point that we are deduplicating structures,
we have not yet deduplicated reference types like pointers. If multiple
copies of a pointer point at the same (deduplicated) integer as in this
case, we do not see them as identical. Special handling already exists
to deal with structures and arrays, so add pointer handling here too.
Reported-by: Alexei Starovoitov <[email protected]>
Signed-off-by: Alan Maguire <[email protected]>
Signed-off-by: Andrii Nakryiko <[email protected]>
Link:
https://lore.kernel.org/bpf/[email protected]
We need to update libbpf to >= 1.6.x, by syncing an updated package from
Debian.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/libbpf/+bug/2122094/+subscriptions
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