diff mbox series

[bpf,2/3] Revert "bpf, sockmap: Prevent lock inversion deadlock in map delete elem"

Message ID 20240527-sockmap-verify-deletes-v1-2-944b372f2101@cloudflare.com (mailing list archive)
State Accepted
Commit 3b9ce0491a43e9af7f108b2f1bced7cd35931660
Delegated to: BPF
Headers show
Series Block deletes from sockmap for tracing programs | expand

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netdev/series_format success Posting correctly formatted
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netdev/fixes_present fail Series targets non-next tree, but doesn't contain any Fixes tags
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netdev/build_32bit success Errors and warnings before: 907 this patch: 907
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netdev/build_clang success Errors and warnings before: 909 this patch: 909
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Commit Message

Jakub Sitnicki May 27, 2024, 11:20 a.m. UTC 
This reverts commit ff91059932401894e6c86341915615c5eb0eca48.

This check is no longer needed. BPF programs attached to tracepoints are
now rejected by the verifier when they attempt to delete from a
sockmap/sockhash maps.

Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
---
 net/core/sock_map.c | 6 ------
 1 file changed, 6 deletions(-)

Comments

John Fastabend May 27, 2024, 4:50 p.m. UTC | #1 
Jakub Sitnicki wrote:
> This reverts commit ff91059932401894e6c86341915615c5eb0eca48.
> 
> This check is no longer needed. BPF programs attached to tracepoints are
> now rejected by the verifier when they attempt to delete from a
> sockmap/sockhash maps.
> 
> Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
> ---

Acked-by: John Fastabend <john.fastabend@gmail.com>
diff mbox series

Patch

diff --git a/net/core/sock_map.c b/net/core/sock_map.c
index 9402889840bf..63c016b4c169 100644
--- a/net/core/sock_map.c
+++ b/net/core/sock_map.c
@@ -423,9 +423,6 @@  static int __sock_map_delete(struct bpf_stab *stab, struct sock *sk_test,
 	struct sock *sk;
 	int err = 0;
 
-	if (irqs_disabled())
-		return -EOPNOTSUPP; /* locks here are hardirq-unsafe */
-
 	spin_lock_bh(&stab->lock);
 	sk = *psk;
 	if (!sk_test || sk_test == sk)
@@ -948,9 +945,6 @@  static long sock_hash_delete_elem(struct bpf_map *map, void *key)
 	struct bpf_shtab_elem *elem;
 	int ret = -ENOENT;
 
-	if (irqs_disabled())
-		return -EOPNOTSUPP; /* locks here are hardirq-unsafe */
-
 	hash = sock_hash_bucket_hash(key, key_size);
 	bucket = sock_hash_select_bucket(htab, hash);