A kernel page fault which happens in lpm map trie_get_next_key is reported
by syzbot and Eric. The issue was introduced by commit b471f2f1de8b
("bpf: implement MAP_GET_NEXT_KEY command for LPM_TRIE map").
Patch #1 fixed the issue in the kernel and patch #2 adds a multithreaded
test case in tools/testing/selftests/bpf/test_lpm_map.
Yonghong Song (2):
bpf: fix kernel page fault in lpm map trie_get_next_key
tools/bpf: add a multithreaded stress test in bpf selftests
test_lpm_map
kernel/bpf/lpm_trie.c | 26 ++++----
tools/testing/selftests/bpf/Makefile | 2 +-
tools/testing/selftests/bpf/test_lpm_map.c | 95 ++++++++++++++++++++++++++++++
3 files changed, 107 insertions(+), 16 deletions(-)
--
2.9.5
