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Merge branch 'inner_map_spin_lock-fix'

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Yonghong Song says:

====================
The inner_map_meta->spin_lock_off is not set correctly during
map creation for BPF_MAP_TYPE_ARRAY_OF_MAPS and BPF_MAP_TYPE_HASH_OF_MAPS.
This may lead verifier error due to misinformation.
This patch set fixed the issue with Patch #1 for the kernel change
and Patch #2 for enhanced selftest test_maps.
====================

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Alexei Starovoitov 2019-02-27 17:03:14 -08:00
commit 3bcd604445
2 changed files with 5 additions and 0 deletions
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1
kernel/bpf/map_in_map.c
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@ -58,6 +58,7 @@ struct bpf_map *bpf_map_meta_alloc(int inner_map_ufd)
inner_map_meta->value_size = inner_map->value_size;
inner_map_meta->map_flags = inner_map->map_flags;
inner_map_meta->max_entries = inner_map->max_entries;
inner_map_meta->spin_lock_off = inner_map->spin_lock_off;
/* Misc members not needed in bpf_map_meta_equal() check. */
inner_map_meta->ops = inner_map->ops;

4
tools/testing/selftests/bpf/progs/test_map_in_map.c
View File

@ -27,6 +27,7 @@ SEC("xdp_mimtest")
int xdp_mimtest0(struct xdp_md *ctx)
{
int value = 123;
int *value_p;
int key = 0;
void *map;
@ -35,6 +36,9 @@ int xdp_mimtest0(struct xdp_md *ctx)
return XDP_DROP;
bpf_map_update_elem(map, &key, &value, 0);
value_p = bpf_map_lookup_elem(map, &key);
if (!value_p || *value_p != 123)
return XDP_DROP;
map = bpf_map_lookup_elem(&mim_hash, &key);
if (!map)