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bpf: Fix a typo in comment for DFS algorithm

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There is a typo in comment for DFS algorithm in bpf/verifier.c. The top
element should not be popped until all its neighbors have been checked.
Fix it.

Fixes: 475fb78fbf ("bpf: verifier (add branch/goto checks)")
Signed-off-by: Xu Kuohai <xukuohai@huawei.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20221027034458.2925218-1-xukuohai@huaweicloud.com
This commit is contained in:
Xu Kuohai 2022-10-26 23:44:58 -04:00 committed by Andrii Nakryiko
parent 96f341a475
commit b6d207999c
1 changed files with 1 additions and 1 deletions
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kernel/bpf/verifier.c
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@ -10670,7 +10670,7 @@ static int check_return_code(struct bpf_verifier_env *env)
* 3 let S be a stack
* 4 S.push(v)
* 5 while S is not empty
* 6 t <- S.pop()
* 6 t <- S.peek()
* 7 if t is what we're looking for:
* 8 return t
* 9 for all edges e in G.adjacentEdges(t) do