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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Wed, 10 Jul 2024 16:16:31 +0200
Subject: [PATCH] bpf: Remove tst_run from lwt_seg6local_prog_ops.
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.10/older/patches-6.10.2-rt14.tar.xz
The syzbot reported that the lwt_seg6 related BPF ops can be invoked
via bpf_test_run() without without entering input_action_end_bpf()
first.
Martin KaFai Lau said that self test for BPF_PROG_TYPE_LWT_SEG6LOCAL
probably didn't work since it was introduced in commit 04d4b274e2a
("ipv6: sr: Add seg6local action End.BPF"). The reason is that the
per-CPU variable seg6_bpf_srh_states::srh is never assigned in the self
test case but each BPF function expects it.
Remove test_run for BPF_PROG_TYPE_LWT_SEG6LOCAL.
Suggested-by: Martin KaFai Lau <martin.lau@linux.dev>
Reported-by: syzbot+608a2acde8c5a101d07d@syzkaller.appspotmail.com
Fixes: d1542d4ae4df ("seg6: Use nested-BH locking for seg6_bpf_srh_states.")
Fixes: 004d4b274e2a ("ipv6: sr: Add seg6local action End.BPF")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/r/20240710141631.FbmHcQaX@linutronix.de
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
net/core/filter.c | 1 -
1 file changed, 1 deletion(-)
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -11047,7 +11047,6 @@ const struct bpf_verifier_ops lwt_seg6lo
};
const struct bpf_prog_ops lwt_seg6local_prog_ops = {
- .test_run = bpf_prog_test_run_skb,
};
const struct bpf_verifier_ops cg_sock_verifier_ops = {
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