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    Subject[PATCH 2/2] ptrace: don't send SIGTRAP on exec if SEIZED
    ptrace_event(PTRACE_EVENT_EXEC) sends SIGTRAP if PT_TRACE_EXEC is
    not set. This is because this SIGTRAP predates PTRACE_O_TRACEEXEC
    option, we do not need/want this with PT_SEIZED which can set the
    options during attach.

    Suggested-by: Pedro Alves <palves@redhat.com>
    Signed-off-by: Oleg Nesterov <oleg@redhat.com>
    ---
    include/linux/ptrace.h | 5 +++--
    1 files changed, 3 insertions(+), 2 deletions(-)

    diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h
    index 6dffe18..407c678 100644
    --- a/include/linux/ptrace.h
    +++ b/include/linux/ptrace.h
    @@ -194,9 +194,10 @@ static inline void ptrace_event(int event, unsigned long message)
    if (unlikely(ptrace_event_enabled(current, event))) {
    current->ptrace_message = message;
    ptrace_notify((event << 8) | SIGTRAP);
    - } else if (event == PTRACE_EVENT_EXEC && unlikely(current->ptrace)) {
    + } else if (event == PTRACE_EVENT_EXEC) {
    /* legacy EXEC report via SIGTRAP */
    - send_sig(SIGTRAP, current, 0);
    + if ((current->ptrace & (PT_PTRACED|PT_SEIZED)) == PT_PTRACED)
    + send_sig(SIGTRAP, current, 0);
    }
    }

    --
    1.5.5.1



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