Bug 851

Summary:	Segmentation fault on the system which have no ppoll()
Product:	Sudo	Reporter:	sasaki
Component:	Sudo	Assignee:	Todd C. Miller <Todd.Miller>
Status:	RESOLVED FIXED
Severity:	normal	CC:	jwestfall
Priority:	low
Version:	1.8.25
Hardware:	PC
OS:	FreeBSD
Attachments:	Patch for lib/util/event_poll.c

Description sasaki 2018-09-12 01:15:56 MDT

Created attachment 515 [details]
Patch for lib/util/event_poll.c

Running 'sudo -s' on the system which does not have ppoll() fails with segmentation fault.

% sudo -s
zsh: segmentation fault  sudo -s

I guess sudo_ev_poll() has to set the timeout value to -1 on such system when timo is NULL.

Comment 1 Todd C. Miller 2018-09-12 06:34:09 MDT

Thanks, that patch looks correct.  I fixed a similar problem with the select backend but forgot to handle it in poll.

Comment 2 Todd C. Miller 2018-09-12 13:29:36 MDT

I've released sudo 1.8.25p1 with this fix.

Comment 3 Todd C. Miller 2018-09-12 14:58:20 MDT

*** Bug 852 has been marked as a duplicate of this bug. ***

Comment 4 Todd C. Miller 2018-09-12 15:00:15 MDT

If for some reason you cannot update to 1.8.25p1, a workaround is to use the --disable-poll configure option.

Comment 5 sasaki 2018-09-12 17:42:41 MDT

Works again. The 1.8.25 using --disable-poll option also works fine.

Thanks!