2025-01-10 13:57 UTC+0100 ~ christoph.werle@xxxxxxxxxx
> Hello Quentin,
>
>> Thanks for this! It looks OK, would you have a minimal reproducer by any
>> chance?
>
> here's a small example based on libbpf-bootstrap:
>
> ------------- reprex_edge_segfault.bpf.c
> // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
>
> #include "vmlinux.h"
> #include <bpf/bpf_helpers.h>
>
> char LICENSE[] SEC("license") = "Dual BSD/GPL";
>
> int __attribute__ ((noinline)) do_barf()
> {
> bpf_printk("We're doomed\n");
> return 0;
> }
>
> SEC("tp/sched/sched_process_exec")
> int handle__sched_process_exec(struct trace_event_raw_sched_process_exec *ctx)
> {
> if (ctx->pid > 1000)
> do_barf();
>
> return 0;
> }
>
> ------------- reprex_edge_segfault.c
> // SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
>
> #include <unistd.h>
> #include <bpf/libbpf.h>
> #include <bpf/bpf.h>
> #include "reprex_edge_segfault.skel.h"
>
> int main(int argc, char **argv)
> {
> struct reprex_edge_segfault_bpf *skel;
> int err=0;
>
> skel = reprex_edge_segfault_bpf__open();
> err = reprex_edge_segfault_bpf__load(skel);
> err = reprex_edge_segfault_bpf__attach(skel);
>
> while (true)
> sleep(1);
>
> reprex_edge_segfault_bpf__destroy(skel);
> return -err;
> }
> --------------
>
> Then just add reprex_edge_segfault to APPS variable in examples/c/Makefile.
>
> Kind regards,
> Christoph
Thanks a lot! I could successfully reproduce the issue and test your patch.
Tested-by: Quentin Monnet <qmo@xxxxxxxxxx>
Reviewed-by: Quentin Monnet <qmo@xxxxxxxxxx>
