Messages in this thread | | | Date | Thu, 10 Apr 2008 12:32:10 +0200 | From | "Michael Kerrisk" <> | Subject | Re: signalfd() not handling sigqueue() sigval data correctly |
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On Thu, Apr 10, 2008 at 7:03 AM, Michael Kerrisk <mtk.manpages@googlemail.com> wrote: > Hi Davide, > > > > I was doing some playing about with signalfd(), and seem to have encountered a > > > bug: when a signalfd read() fetches data for a signal that was sent by > > > sigqueue(), the data accompanying the signal is not returned. Instead > > > ssi_int/ssi_ptr is zero. > > > > Michael, can you give the patch below a spin? I tested it on my x86_64 box > > and seems to be working fine: > > > > Got signal 44 > > ssi_code= -1 > > ssi_pid = 6314 > > ssi_uid = 1000 > > ssi_int = 123 > > ssi_ptr = 7b > > This works for me on x86-32. Thanks Davide!
Davide,
Are you going to get this pushed into 2.6.26? I assume we can't get it into 2.6.25...
Cheers,
Michael
> > --- > > fs/signalfd.c | 7 ++++++- > > 1 file changed, 6 insertions(+), 1 deletion(-) > > > > Index: linux-2.6.mod/fs/signalfd.c > > =================================================================== > > --- linux-2.6.mod.orig/fs/signalfd.c 2008-04-09 11:53:37.000000000 -0700 > > +++ linux-2.6.mod/fs/signalfd.c 2008-04-09 12:05:46.000000000 -0700 > > @@ -111,9 +111,14 @@ > > err |= __put_user(kinfo->si_uid, &uinfo->ssi_uid); > > err |= __put_user((long) kinfo->si_ptr, &uinfo->ssi_ptr); > > break; > > - default: /* this is just in case for now ... */ > > + default: > > + /* > > + * This case catches also the signals queued by sigqueue(). > > + */ > > err |= __put_user(kinfo->si_pid, &uinfo->ssi_pid); > > err |= __put_user(kinfo->si_uid, &uinfo->ssi_uid); > > + err |= __put_user((long) kinfo->si_ptr, &uinfo->ssi_ptr); > > + err |= __put_user(kinfo->si_int, &uinfo->ssi_int); > > break; > > } > > > > > > > > > -- > Michael Kerrisk > Maintainer of the Linux man-pages project: http://www.kernel.org/doc/man-pages/ > Want to report a man-pages bug? Look here: > http://www.kernel.org/doc/man-pages/reporting_bugs.html >
-- Michael Kerrisk Maintainer of the Linux man-pages project http://www.kernel.org/doc/man-pages/ Want to report a man-pages bug? Look here: http://www.kernel.org/doc/man-pages/reporting_bugs.html
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