Thomas Richter f9ea3225dd bpf: fix selftest/bpf/test_pkt_md_access on s390x ... Commit 18f3d6be6b ("selftests/bpf: Add test cases to test narrower ctx field loads") introduced new eBPF test cases. One of them (test_pkt_md_access.c) fails on s390x. The BPF verifier error message is: [root@s8360046 bpf]# ./test_progs test_pkt_access:PASS:ipv4 349 nsec test_pkt_access:PASS:ipv6 212 nsec [....] libbpf: load bpf program failed: Permission denied libbpf: -- BEGIN DUMP LOG --- libbpf: 0: (71) r2 = *(u8 *)(r1 +0) invalid bpf_context access off=0 size=1 libbpf: -- END LOG -- libbpf: failed to load program 'test1' libbpf: failed to load object './test_pkt_md_access.o' Summary: 29 PASSED, 1 FAILED [root@s8360046 bpf]# This is caused by a byte endianness issue. S390x is a big endian architecture. Pointer access to the lowest byte or halfword of a four byte value need to add an offset. On little endian architectures this offset is not needed. Fix this and use the same approach as the originator used for other files (for example test_verifier.c) in his original commit. With this fix the test program test_progs succeeds on s390x: [root@s8360046 bpf]# ./test_progs test_pkt_access:PASS:ipv4 236 nsec test_pkt_access:PASS:ipv6 217 nsec test_xdp:PASS:ipv4 3624 nsec test_xdp:PASS:ipv6 1722 nsec test_l4lb:PASS:ipv4 926 nsec test_l4lb:PASS:ipv6 1322 nsec test_tcp_estats:PASS: 0 nsec test_bpf_obj_id:PASS:get-fd-by-notexist-prog-id 0 nsec test_bpf_obj_id:PASS:get-fd-by-notexist-map-id 0 nsec test_bpf_obj_id:PASS:get-prog-info(fd) 0 nsec test_bpf_obj_id:PASS:get-map-info(fd) 0 nsec test_bpf_obj_id:PASS:get-prog-info(fd) 0 nsec test_bpf_obj_id:PASS:get-map-info(fd) 0 nsec test_bpf_obj_id:PASS:get-prog-fd(next_id) 0 nsec test_bpf_obj_id:PASS:get-prog-info(next_id->fd) 0 nsec test_bpf_obj_id:PASS:get-prog-fd(next_id) 0 nsec test_bpf_obj_id:PASS:get-prog-info(next_id->fd) 0 nsec test_bpf_obj_id:PASS:check total prog id found by get_next_id 0 nsec test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec test_bpf_obj_id:PASS:check get-map-info(next_id->fd) 0 nsec test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec test_bpf_obj_id:PASS:check get-map-info(next_id->fd) 0 nsec test_bpf_obj_id:PASS:check total map id found by get_next_id 0 nsec test_pkt_md_access:PASS: 277 nsec Summary: 30 PASSED, 0 FAILED [root@s8360046 bpf]# Fixes: 18f3d6be6b ("selftests/bpf: Add test cases to test narrower ctx field loads") Signed-off-by: Thomas Richter <tmricht@linux.vnet.ibm.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>		2017-08-07 10:06:27 -07:00
..
accounting
arch
build	bpf, s390: fix build for libbpf and selftest suite	2017-08-04 11:18:01 -07:00
cgroup
firewire
gpio
hv	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2017-07-05 12:31:59 -07:00
iio
include	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2017-07-05 12:31:59 -07:00
kvm/kvm_stat	tools/kvm_stat: add '-f help' to get the available event list	2017-07-26 19:04:53 +02:00
laptop
leds
lguest
lib	bpf, s390: fix build for libbpf and selftest suite	2017-08-04 11:18:01 -07:00
net	tools: bpf_jit_disasm: Handle large images.	2017-06-14 15:03:22 -04:00
nfsd
objtool	objtool: Fix sibling call detection logic	2017-07-08 10:29:48 +02:00
pci
pcmcia
perf	Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-07-21 11:12:48 -07:00
power	ACPI updates for v4.13-rc1	2017-07-04 14:16:49 -07:00
scripts	kbuild: simplify silent build (-s) detection	2017-06-06 09:01:12 +09:00
spi
testing	bpf: fix selftest/bpf/test_pkt_md_access on s390x	2017-08-07 10:06:27 -07:00
thermal/tmon
time
usb	usb: changes for v4.13 merge window	2017-06-20 11:39:34 +08:00
virtio
vm
Makefile	tools: Add install make target for liblockdep	2017-06-05 09:28:08 +02:00