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f789afed94
Add a regression test for the NULL current->bpf_net_context deref hit when a BPF classifier attached to a qdisc qevent block asks for a redirect. The classifier runs from tcf_qevent_handle() on the qdisc enqueue path, outside any bpf_net_context. # LDLIBS=-static PKG_CONFIG='pkg-config --static' ./vmtest.sh -- ./test_progs -t qevent [...] + /etc/rcS.d/S50-startup ./test_progs -t qevent #496/1 tc_qevent/redirect_verdict:OK #496/2 tc_qevent/redirect_helper:OK #496 tc_qevent:OK Summary: 1/2 PASSED, 0 SKIPPED, 0 FAILED Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Link: https://patch.msgid.link/20260706185609.330006-4-daniel@iogearbox.net Signed-off-by: Jakub Kicinski <kuba@kernel.org>
24 lines
482 B
C
24 lines
482 B
C
// SPDX-License-Identifier: GPL-2.0
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#include "vmlinux.h"
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#include <bpf/bpf_helpers.h>
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int redirect_ifindex = 1;
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__u64 verdict_calls = 0;
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__u64 helper_calls = 0;
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SEC("tc")
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int qevent_redirect_verdict(struct __sk_buff *skb)
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{
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__sync_fetch_and_add(&verdict_calls, 1);
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return TCX_REDIRECT;
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}
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SEC("tc")
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int qevent_redirect_helper(struct __sk_buff *skb)
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{
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__sync_fetch_and_add(&helper_calls, 1);
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return bpf_redirect(redirect_ifindex, 0);
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}
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char _license[] SEC("license") = "GPL";
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