Confirmed that I'm no longer seeing the segfault. Thanks!
** Changed in: llvm-toolchain-10 (Ubuntu)
Status: Incomplete => Fix Released
** Changed in: linux (Ubuntu)
Status: Incomplete => Invalid
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https://bugs.launchpad.net/bugs/1866882
Title:
segfault in libllvm-10 when building kernel bpf selftests on s390
Status in linux package in Ubuntu:
Invalid
Status in llvm-toolchain-10 package in Ubuntu:
Fix Released
Bug description:
Seeing this in autopkgtest for the 5.4.0-18 kernel. Only happens on
s390, other architectures are fine.
Stack dump:
0. Program arguments: llc -march=bpf -mcpu=probe -filetype=obj -o
/tmp/autopkgtest.92AlD3/build.vya/src/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/bpf/btf__core_reloc_nesting___err_array_container.o
#0 0x000003ff830ab14a (/lib/s390x-linux-gnu/libLLVM-10.so.1+0x9ab14a)
Segmentation fault (core dumped)
Full log:
https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac
/autopkgtest-focal/focal/s390x/l/linux/20200310_180956_146bd@/log.gz
This did not happen for the 5.4.0-17 upload with llvm-9, with no
changes to the bpf program being compiled when the segfault happens
between the -17 and -18 uploads.
To reproduce, clone the focal kernel tree and build the bpf selftests.
$ git clone --single-branch --depth=1 -b master-next
git://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal
$ make -C focal/tools/testing/selftests TARGETS=bpf
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