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authorDaniel Borkmann <daniel@iogearbox.net>2017-10-17 16:55:54 +0200
committerDavid S. Miller <davem@davemloft.net>2017-10-19 13:13:50 +0100
commitbc6d5031b43a2291de638ab9304320b4cae61689 (patch)
treec67f4312dd0af8422b5400b0442583660535df12 /kernel/bpf/arraymap.c
parent82f8dd28bd3abe181b7a66ea4ea132134d37a400 (diff)
bpf: do not test for PCPU_MIN_UNIT_SIZE before percpu allocations
PCPU_MIN_UNIT_SIZE is an implementation detail of the percpu allocator. Given we support __GFP_NOWARN now, lets just let the allocation request fail naturally instead. The two call sites from BPF mistakenly assumed __GFP_NOWARN would work, so no changes needed to their actual __alloc_percpu_gfp() calls which use the flag already. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Acked-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel/bpf/arraymap.c')
-rw-r--r--kernel/bpf/arraymap.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/bpf/arraymap.c b/kernel/bpf/arraymap.c
index 98c0f00c3f5e..e2636737b69b 100644
--- a/kernel/bpf/arraymap.c
+++ b/kernel/bpf/arraymap.c
@@ -98,7 +98,7 @@ static struct bpf_map *array_map_alloc(union bpf_attr *attr)
array_size += (u64) attr->max_entries * elem_size * num_possible_cpus();
if (array_size >= U32_MAX - PAGE_SIZE ||
- elem_size > PCPU_MIN_UNIT_SIZE || bpf_array_alloc_percpu(array)) {
+ bpf_array_alloc_percpu(array)) {
bpf_map_area_free(array);
return ERR_PTR(-ENOMEM);
}