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    Subject[PATCH 6.0 157/862] tracing/eprobe: Fix alloc event dir failed when event name no set
    Date
    From: Tao Chen <chentao.kernel@linux.alibaba.com>

    commit dc399adecd4e2826868e5d116a58e33071b18346 upstream.

    The event dir will alloc failed when event name no set, using the
    command:
    "echo "e:esys/ syscalls/sys_enter_openat file=\$filename:string"
    >> dynamic_events"
    It seems that dir name="syscalls/sys_enter_openat" is not allowed
    in debugfs. So just use the "sys_enter_openat" as the event name.

    Link: https://lkml.kernel.org/r/1664028814-45923-1-git-send-email-chentao.kernel@linux.alibaba.com

    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Tom Zanussi <zanussi@kernel.org>
    Cc: Linyu Yuan <quic_linyyuan@quicinc.com>
    Cc: Tao Chen <chentao.kernel@linux.alibaba.com
    Cc: stable@vger.kernel.org
    Fixes: 95c104c378dc ("tracing: Auto generate event name when creating a group of events")
    Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
    Signed-off-by: Tao Chen <chentao.kernel@linux.alibaba.com>
    Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    kernel/trace/trace_eprobe.c | 3 +--
    1 file changed, 1 insertion(+), 2 deletions(-)

    --- a/kernel/trace/trace_eprobe.c
    +++ b/kernel/trace/trace_eprobe.c
    @@ -968,8 +968,7 @@ static int __trace_eprobe_create(int arg
    }

    if (!event) {
    - strscpy(buf1, argv[1], MAX_EVENT_NAME_LEN);
    - sanitize_event_name(buf1);
    + strscpy(buf1, sys_event, MAX_EVENT_NAME_LEN);
    event = buf1;
    }


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