| Message ID | 20150826121400.14339.57368.stgit@r2d2.cica.es |
|---|---|
| State | Not Applicable |
| Delegated to: | Pablo Neira |
| Headers | show |
On Wed, Aug 26, 2015 at 02:14:00PM +0200, Arturo Borrero Gonzalez wrote: > From: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com> > > When running a pair of conntrackd nodes, in NOTRACK/tcp sync mode, and one > conntrackd instance is shut down this can happen: > > [...] > Program received signal SIGPIPE, Broken pipe. > 0x00007ffff6ef99d3 in __sendto_nocancel () at ../sysdeps/unix/syscall-template.S:82 > (gdb) bt > #0 0x00007ffff6ef99d3 in __sendto_nocancel () at ../sysdeps/unix/syscall-template.S:82 > #1 0x0000000000416744 in tcp_send (m=0x657470, data=0x656e90, size=1436) at tcp.c:304 > #2 0x0000000000416b8c in channel_tcp_send (channel=<optimized out>, data=<optimized out>, len=<optimized out>) at channel_tcp.c:47 > #3 0x00000000004159ac in channel_send (c=0x656e60, net=0x64b3a0) at channel.c:241 > #4 0x00000000004184ee in internal_bypass_ct_event_del (ct=<optimized out>, origin=<optimized out>) at internal_bypass.c:148 > #5 internal_bypass_ct_event_del (ct=0x654940, origin=6647440) at internal_bypass.c:139 > #6 0x00000000004103c2 in event_handler (nlh=0x7fffffffb330, type=NFCT_T_DESTROY, ct=0x654940, data=<optimized out>) at ctnl.c:198 > #7 0x00007ffff79c1afb in __callback (nlh=0x7fffffffb330, nfa=<optimized out>, data=0x654860) at callback.c:60 > #8 0x00007ffff71ab06f in nfnl_step (h=h@entry=0x658e50, nlh=nlh@entry=0x7fffffffb330) at libnfnetlink.c:1341 > #9 0x00007ffff71ab813 in nfnl_process (h=h@entry=0x658e50, buf=buf@entry=0x7fffffffb330 "\214", len=len@entry=140) at libnfnetlink.c:1386 > #10 0x00007ffff71abb86 in nfnl_catch (h=0x658e50) at libnfnetlink.c:1540 > #11 0x00007ffff79c2a2d in nfct_catch (h=<optimized out>) at api.c:1024 > #12 0x0000000000410570 in event_cb (data=<optimized out>) at ctnl.c:330 > #13 0x000000000040ddb4 in select_main_step (next_alarm=0x7fffffffd390) at fds.c:126 > #14 select_main_loop () at fds.c:147 > #15 0x0000000000409104 in main (argc=<optimized out>, argv=<optimized out>) at main.c:428 > [...] > > >From sendto(2): > EPIPE [...] the process will also receive a SIGPIPE unless MSG_NOSIGNAL is set Hm, we're already ignoring SIGPIPE. I guess this has to be with your gdb configuration? https://sourceware.org/gdb/onlinedocs/gdb/Signals.html -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/src/tcp.c b/src/tcp.c index c8f2544..07f3e6d 100644 --- a/src/tcp.c +++ b/src/tcp.c @@ -301,7 +301,7 @@ ssize_t tcp_send(struct tcp_sock *m, const void *data, int size) m->state = TCP_CLIENT_CONNECTED; } case TCP_CLIENT_CONNECTED: - ret = sendto(m->fd, data, size, 0, + ret = sendto(m->fd, data, size, MSG_NOSIGNAL, (struct sockaddr *) &m->addr, m->sockaddr_len); if (ret == -1) { if (errno == EPIPE || errno == ECONNRESET) {