Yauheni Kaliuta 6185266c5a selftests/bpf: Mask bpf_csum_diff() return value to 16 bits in test_verifier ... The verifier test labelled "valid read map access into a read-only array 2" calls the bpf_csum_diff() helper and checks its return value. However, architecture implementations of csum_partial() (which is what the helper uses) differ in whether they fold the return value to 16 bit or not. For example, x86 version has ... if (unlikely(odd)) { result = from32to16(result); result = ((result >> 8) & 0xff) | ((result & 0xff) << 8); } ... while generic lib/checksum.c does: result = from32to16(result); if (odd) result = ((result >> 8) & 0xff) | ((result & 0xff) << 8); This makes the helper return different values on different architectures, breaking the test on non-x86. To fix this, add an additional instruction to always mask the return value to 16 bits, and update the expected return value accordingly. Fixes: fb2abb73e5 ("bpf, selftest: test {rd, wr}only flags and direct value access") Signed-off-by: Yauheni Kaliuta <yauheni.kaliuta@redhat.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210228103017.320240-1-yauheni.kaliuta@redhat.com		2021-03-02 11:50:00 +01:00
..
fault-injection	docs: fault-injection: convert docs to ReST and rename to *.rst	2019-06-14 14:21:07 -06:00
ktest	Kbuild updates for v5.11	2020-12-22 14:02:39 -08:00
kunit	kunit: tool: fix unintentional statefulness in run_kernel()	2021-02-08 16:10:22 -07:00
nvdimm	ndtest: Add papr health related flags	2021-01-28 00:22:49 -08:00
radix-tree	ida: Free allocated bitmap in error path	2020-10-07 09:11:33 -04:00
scatterlist	tools/testing/scatterlist: Fix overflow of max segment size	2021-01-28 15:17:39 -04:00
selftests	selftests/bpf: Mask bpf_csum_diff() return value to 16 bits in test_verifier	2021-03-02 11:50:00 +01:00
vsock	SPDX patches for 5.7-rc1.	2020-04-03 13:12:26 -07:00