Author: sef
Date: Mon Mar 11 02:42:49 2019
New Revision: 344995
URL: https://svnweb.freebsd.org/changeset/base/344995
Log:
MFC r344402
* Handle SIGPIPE in gssd
We've got some cases where the other end of gssd's AF_LOCAL socket gets
closed, resulting in an error (and SIGPIPE) when it tries to do I/O to it.
Closing without cleaning up means the next time nfsd starts up, it hangs,
unkillably; this allows gssd to handle that particular error.
* Limit the retry cound in gssd_syscall to 5.
The default is INT_MAX, which effectively means forever. And it's an
uninterruptable RPC call, so it will never stop.
The two changes mitigate the problem.
Modified:
stable/12/sys/kgssapi/gss_impl.c
stable/12/usr.sbin/gssd/gssd.c
Directory Properties:
stable/12/ (props changed)
Modified: stable/12/sys/kgssapi/gss_impl.c
==============================================================================
--- stable/12/sys/kgssapi/gss_impl.c Mon Mar 11 02:02:04 2019
(r344994)
+++ stable/12/sys/kgssapi/gss_impl.c Mon Mar 11 02:42:49 2019
(r344995)
@@ -112,6 +112,15 @@ sys_gssd_syscall(struct thread *td, struct gssd_syscal
cl = clnt_reconnect_create(nconf,
(struct sockaddr *) &sun, GSSD, GSSDVERS,
RPC_MAXDATASIZE, RPC_MAXDATASIZE);
+ /*
+ * The number of retries defaults to INT_MAX, which effectively
+ * means an infinite, uninterruptable loop. Limiting it to
+ * five retries keeps it from running forever.
+ */
+ if (cl != NULL) {
+ int retry_count = 5;
+ CLNT_CONTROL(cl, CLSET_RETRIES, &retry_count);
+ }
} else
cl = NULL;
Modified: stable/12/usr.sbin/gssd/gssd.c
==============================================================================
--- stable/12/usr.sbin/gssd/gssd.c Mon Mar 11 02:02:04 2019
(r344994)
+++ stable/12/usr.sbin/gssd/gssd.c Mon Mar 11 02:42:49 2019
(r344995)
@@ -202,6 +202,7 @@ main(int argc, char **argv)
signal(SIGHUP, SIG_IGN);
}
signal(SIGTERM, gssd_terminate);
+ signal(SIGPIPE, gssd_terminate);
memset(&sun, 0, sizeof sun);
sun.sun_family = AF_LOCAL;
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