** Also affects: ubuntu-kernel-tests
Importance: Undecided
Status: New
** Tags added: 4.15 bionic s390x sru-20210510
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https://bugs.launchpad.net/bugs/1928522
Title:
seccomp_bpf:syscall_faked from kselftests fail on s390x
Status in ubuntu-kernel-tests:
New
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Bionic:
In Progress
Status in linux source package in Focal:
In Progress
Status in linux source package in Groovy:
Fix Released
Status in linux source package in Hirsute:
Fix Released
Status in linux source package in Impish:
Fix Released
Bug description:
[Impact]
kselftests seccomp_bpf will start failing on s390x, though due to a test
problem, not a kernel regression, thus wasting people's time doing test review.
[Regression potential]
Though this is only changing the test, we might be missing or miss failures
in the future because some tests are not executed anymore.
ptrace_syscall_faked, ptrace_syscall_errno and syscall_errno should all work
just fine on s390x, but will be skipped as well with this change.
[Fix]
The fix is to consider that s390x cannot change syscall and errno at once by
using ptrace. It can, however, change the errno at syscall exit time, which
could even be used with seccomp SECCOMP_RET_TRACE as long as ptrace is used to
track the exit transitions. But the test is not designed to deal with such
situations.
[Test case]
seccomp_bpf was run, ptrace_faked passed and no new subtests have failed.
-------------------------------
This is a scripted bug report about ADT failures while running linux tests
for linux/4.15.0-144.148 on bionic. Whether this is caused by the dep8 tests of
the tested source or the kernel has yet to be determined.
Testing failed on:
s390x:
https://autopkgtest.ubuntu.com/results/autopkgtest-bionic/bionic/s390x/l/linux/20210514_022345_e6f3c@/log.gz
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