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[BZ #14889]

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* sunrpc/rpc/svc.h (__svc_accept_failed): New prototype.
        * sunrpc/svc.c: Include time.h.
        (__svc_accept_failed): New function.
        * sunrpc/svc_tcp.c (rendezvous_request): If the accept fails for
        any reason other than EINTR, call __svc_accept_failed.
        * sunrpc/svc_udp.c (svcudp_recv): Similarly.
        * sunrpc/svc_unix.c (rendezvous_request): Similarly.
This commit is contained in:
Jeff Law 2012-11-28 14:12:28 -07:00
parent b54eb3cb0a
commit 14bc93a967
7 changed files with 127 additions and 3 deletions
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12
ChangeLog
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@ -1,3 +1,15 @@
2012-11-28 Jeff Law <law@redhat.com>
Martin Osvald <mosvald@redhat.com>
[BZ #14889]
* sunrpc/rpc/svc.h (__svc_accept_failed): New prototype.
* sunrpc/svc.c: Include time.h.
(__svc_accept_failed): New function.
* sunrpc/svc_tcp.c (rendezvous_request): If the accept fails for
any reason other than EINTR, call __svc_accept_failed.
* sunrpc/svc_udp.c (svcudp_recv): Similarly.
* sunrpc/svc_unix.c (rendezvous_request): Similarly.
2012-11-28 Andreas Schwab <schwab@suse.de>
* scripts/abilist.awk: Also handle indirect functions in .opd

6
NEWS
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@ -21,7 +21,11 @@ Version 2.17
14621, 14638, 14645, 14648, 14652, 14660, 14661, 14669, 14672, 14683,
14694, 14716, 14719, 14743, 14767, 14783, 14784, 14785, 14793, 14796,
14797, 14801, 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828,
14831, 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871.
14831, 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871,
14889.
* CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
EMFILE has been fixed (Bugzilla #14889).
* The add-on ports collection is now distributed in the "ports" subdirectory
of the main GNU C Library distribution, rather than separately.

18
sunrpc/rpc/svc.h
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@ -1,6 +1,23 @@
/*
* svc.h, Server-side remote procedure call interface.
*
* Copyright (C) 2012 Free Software Foundation, Inc.
* This file is part of the GNU C Library.
*
* The GNU C Library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* The GNU C Library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with the GNU C Library; if not, see
* <http://www.gnu.org/licenses/>.
*
* Copyright (c) 2010, Oracle America, Inc.
*
* Redistribution and use in source and binary forms, with or without
@ -316,4 +333,5 @@ extern SVCXPRT *svcunix_create (int __sock, u_int __sendsize, u_int __recvsize,
__END_DECLS
extern void __svc_accept_failed (void) attribute_hidden;
#endif /* rpc/svc.h */

33
sunrpc/svc.c
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@ -4,6 +4,23 @@
* There are two sets of procedures here. The xprt routines are
* for handling transport handles. The svc routines handle the
* list of service routines.
* Copyright (C) 2002-2012 Free Software Foundation, Inc.
* This file is part of the GNU C Library.
* Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
*
* The GNU C Library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* The GNU C Library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with the GNU C Library; if not, see
* <http://www.gnu.org/licenses/>.
*
* Copyright (c) 2010, Oracle America, Inc.
*
@ -41,6 +58,7 @@
#include <rpc/svc.h>
#include <rpc/pmap_clnt.h>
#include <sys/poll.h>
#include <time.h>
#ifdef _RPC_THREAD_SAFE_
#define xports RPC_THREAD_VARIABLE(svc_xports_s)
@ -544,6 +562,21 @@ svc_getreq_common (const int fd)
}
libc_hidden_nolink_sunrpc (svc_getreq_common, GLIBC_2_2)
/* If there are no file descriptors available, then accept will fail.
We want to delay here so the connection request can be dequeued;
otherwise we can bounce between polling and accepting, never giving the
request a chance to dequeue and eating an enormous amount of cpu time
in svc_run if we're polling on many file descriptors. */
void
__svc_accept_failed (void)
{
if (errno == EMFILE)
{
struct timespec ts = { .tv_sec = 0, .tv_nsec = 50000000 };
__nanosleep (&ts, NULL);
}
}
#ifdef _RPC_THREAD_SAFE_
void

18
sunrpc/svc_tcp.c
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@ -1,6 +1,23 @@
/*
* svc_tcp.c, Server side for TCP/IP based RPC.
*
* Copyright (C) 2012 Free Software Foundation, Inc.
* This file is part of the GNU C Library.
*
* The GNU C Library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* The GNU C Library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with the GNU C Library; if not, see
* <http://www.gnu.org/licenses/>.
*
* Copyright (c) 2010, Oracle America, Inc.
*
* Redistribution and use in source and binary forms, with or without
@ -247,6 +264,7 @@ again:
{
if (errno == EINTR)
goto again;
__svc_accept_failed ();
return FALSE;
}
/*

25
sunrpc/svc_udp.c
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@ -3,6 +3,23 @@
* Server side for UDP/IP based RPC. (Does some caching in the hopes of
* achieving execute-at-most-once semantics.)
*
* Copyright (C) 2012 Free Software Foundation, Inc.
* This file is part of the GNU C Library.
*
* The GNU C Library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* The GNU C Library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with the GNU C Library; if not, see
* <http://www.gnu.org/licenses/>.
*
* Copyright (c) 2010, Oracle America, Inc.
*
* Redistribution and use in source and binary forms, with or without
@ -277,8 +294,12 @@ again:
(int) su->su_iosz, 0,
(struct sockaddr *) &(xprt->xp_raddr), &len);
xprt->xp_addrlen = len;
if (rlen == -1 && errno == EINTR)
goto again;
if (rlen == -1)
{
if (errno == EINTR)
goto again;
__svc_accept_failed ();
}
if (rlen < 16) /* < 4 32-bit ints? */
return FALSE;
xdrs->x_op = XDR_DECODE;

18
sunrpc/svc_unix.c
View File

@ -1,6 +1,23 @@
/*
* svc_unix.c, Server side for TCP/IP based RPC.
*
* Copyright (C) 2012 Free Software Foundation, Inc.
* This file is part of the GNU C Library.
*
* The GNU C Library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* The GNU C Library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with the GNU C Library; if not, see
* <http://www.gnu.org/licenses/>.
*
* Copyright (c) 2010, Oracle America, Inc.
*
* Redistribution and use in source and binary forms, with or without
@ -244,6 +261,7 @@ again:
{
if (errno == EINTR)
goto again;
__svc_accept_failed ();
return FALSE;
}
/*