Andrii Nakryiko 91097fbee4 btf: fix bug with resolving STRUCT/UNION into corresponding FWD ... When checking available canonical candidates for struct/union algorithm utilizes btf_dedup_is_equiv to determine if candidate is suitable. This check is not enough when candidate is corresponding FWD for that struct/union, because according to equivalence logic they are equivalent. When it so happens that FWD and STRUCT/UNION end in hashing to the same bucket, it's possible to create remapping loop from FWD to STRUCT and STRUCT to same FWD, which will cause btf_dedup() to loop forever. This patch fixes the issue by additionally checking that type and canonical candidate are strictly equal (utilizing btf_equal_struct). Fixes: d5caef5b56 ("btf: add BTF types deduplication algorithm") Reported-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Song Liu <songliubraving@fb.com> Acked-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>		2019-03-01 01:31:48 +01:00
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accounting
arch	powerpc fixes for 5.0 #3	2019-01-19 05:55:42 +12:00
bpf	tools: libbpf: add a correctly named define for map iteration	2019-03-01 00:53:45 +01:00
build
cgroup
crypto
firewire
firmware
gpio
hv
iio
include	tools/bpf: sync bpf.h into tools	2019-02-27 17:22:51 +01:00
kvm/kvm_stat
laptop
leds
lib	btf: fix bug with resolving STRUCT/UNION into corresponding FWD	2019-03-01 01:31:48 +01:00
memory-model
nfsd
objtool
pci
pcmcia
perf	tools: libbpf: add a correctly named define for map iteration	2019-03-01 00:53:45 +01:00
power
scripts
spi
testing	selftests/bpf: fix btf_dedup testing code	2019-03-01 01:31:47 +01:00
thermal/tmon
time
usb
virtio
vm
wmi
Makefile