On 01/25/2018 10:57 AM, Orion Poplawski wrote:
> I'm trying to debug a segfault in libssh used by x2goclient.
The actual segfault I'm seeing is here:
2018/01/25 11:29:49.974392, 3] ssh_socket_unbuffered_write: Enabling POLLOUT
for socket
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7180f5b in ssh_poll_set_events (p=0x7fffdc00c1a0, events=4)
at /usr/src/debug/master/src/poll.c:349
349 p->ctx->pollfds[p->x.idx].events = events;
(gdb) print *p
$1 = {ctx = 0x7fffdc00e410, session = 0x7fffdc003190, x = {fd = 18, idx = 18},
events = 4,
lock = 0, cb = 0x7ffff7184700 <ssh_socket_pollcallback>, cb_data =
0x7fffdc003ae0}
(gdb) print *p->ctx
$2 = {pollptrs = 0x4d70aaec309957, pollfds = 0x45, polls_allocated =
140736884427952,
polls_used = 0, chunk_size = 20}
So pollfds is obviously not a valid pointer here.
--
Orion Poplawski
Manager of NWRA Technical Systems 720-772-5637
NWRA, Boulder/CoRA Office FAX: 303-415-9702
3380 Mitchell Lane [email protected]
Boulder, CO 80301 https://www.nwra.com/
