On 02/06/2017 04:57 PM, Jann Horn wrote:
> See __send_signal() in kernel/signal.c:
Thanks, Jann. Patch applied.
Cheers,
Michael
> if (sig >= SIGRTMIN && info->si_code != SI_USER) {
> /*
> * Queue overflow, abort. We may abort if the
> * signal was rt and sent by user using something
> * other than kill().
> */
> result = TRACE_SIGNAL_OVERFLOW_FAIL;
> ret = -EAGAIN;
> goto ret;
> }
>
> (kill() uses SI_USER, but tkill() and tgkill() use SI_TKILL.)
>
> Signed-off-by: Jann Horn <jannh@xxxxxxxxxx>
> ---
> man2/tkill.2 | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/man2/tkill.2 b/man2/tkill.2
> index a61ef3182..dce5dd94c 100644
> --- a/man2/tkill.2
> +++ b/man2/tkill.2
> @@ -103,6 +103,18 @@ For the required permissions, see
> .TP
> .B ESRCH
> No process with the specified thread ID (and thread group ID) exists.
> +.TP
> +.B EAGAIN
> +The
> +.B RLIMIT_SIGPENDING
> +resource limit was reached and
> +.I sig
> +is a real-time signal.
> +.TP
> +.B EAGAIN
> +Insufficient kernel memory was available and
> +.I sig
> +is a real-time signal.
> .SH VERSIONS
> .BR tkill ()
> is supported since Linux 2.4.19 / 2.5.4.
>
--
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/
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