[SRU][R][PATCH 0/1] Revert mistakenly-picked bpf commit from upstream

[Alice C. Munduruca]

BugLink: https://bugs.launchpad.net/bugs/2165872

[ Impact ]

Upstream stable linux-7.1.y picked up a commit from the sleepable tracepoint
patchset [1] in order to adjust the context for a BPF verifier fix commit:
5b038319be44 ("bpf: Reject sleepable BPF_LSM_CGROUP programs at load time").

The other changes in the patchset were not included (except for adding sleepable
tracepoint selftests later in v7.1.9) which causes bugs when attaching a tracepoint
BPF program on faultable tracepoints.

[ Fix ]

As a result, resolute will revert the changes from commit 2946e2f49e86d
("bpf: Verifier support for sleepable tracepoint programs") while keeping
the check for BPF_LSM_CGROUP which is the significant part of the fix commit
mentionned above.

[ Test Plan ]

The patch has been compiled on CBD and booted locally.

[ What could go wrong ]

Changes are limited to the BPF verifier. Although unlikely since the revert is quite
clean, it is possible that some non-conformant BPF programs may be accepted and run
due to the changes.

[ Extra Information ]

[1]: https://lore.kernel.org/all/20260421-sleepable_tracepoints-v11-0-d8ff138d6f05@meta.com/

Alice C. Munduruca (1):
  UBUNTU: SAUCE: Revert "bpf: Verifier support for sleepable tracepoint
    programs"

 kernel/bpf/syscall.c  |  5 -----
 kernel/bpf/verifier.c | 13 ++-----------
 2 files changed, 2 insertions(+), 16 deletions(-)

-- 
2.53.0