[PATCH] eal: fix segment fault when exit trace

[David Marchand]

On Tue, Jun 7, 2022 at 2:06 PM Chengwen Feng <fengchengwen at huawei.com> wrote:
>
> Bug scenario:
> 1. start testpmd:
>         dpdk-testpmd -l 4-6 -a 0000:7d:00.0 --trace=.* -- -i
> 2. quit testpmd and then observed segment fault:
>         Bye...
>         Segmentation fault (core dumped)
>
> The root cause is that rte_trace_save() and eal_trace_fini() access
> the huge pages which were cleanup by rte_eal_memory_detach().
>
> This patch moves rte_trace_save() and eal_trace_fini() before
> rte_eal_memory_detach() to fix the bug.
>
> Fixes: dfbc61a2f9a6 ("mem: detach memsegs on cleanup")
> Cc: stable at dpdk.org
>
> Signed-off-by: Chengwen Feng <fengchengwen at huawei.com>

Good catch.
It was introduced in 21.05.
It's a bit concerning that it got unnoticed so far.

-- 
David Marchand