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5f19d1219a
Per-net sysctl table needs to be explicitly freed at
net exit. Otherwise we see the following with kmemleak:
unreferenced object 0xffff880402d08000 (size 2048):
comm "chrome_sandbox", pid 18437, jiffies 4310887172 (age 9097.630s)
hex dump (first 32 bytes):
b2 68 89 81 ff ff ff ff 20 04 04 f8 01 88 ff ff .h...... .......
04 00 00 00 a4 01 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff815b4aad>] kmemleak_alloc+0x21/0x3e
[<ffffffff81110352>] slab_post_alloc_hook+0x28/0x2a
[<ffffffff81113fad>] __kmalloc_track_caller+0xf1/0x104
[<ffffffff810f10c2>] kmemdup+0x1b/0x30
[<ffffffff81571e9f>] sctp_sysctl_net_register+0x1f/0x72
[<ffffffff8155d305>] sctp_net_init+0x100/0x39f
[<ffffffff814ad53c>] ops_init+0xc6/0xf5
[<ffffffff814ad5b7>] setup_net+0x4c/0xd0
[<ffffffff814ada5e>] copy_net_ns+0x6d/0xd6
[<ffffffff810938b1>] create_new_namespaces+0xd7/0x147
[<ffffffff810939f4>] copy_namespaces+0x63/0x99
[<ffffffff81076733>] copy_process+0xa65/0x1233
[<ffffffff81077030>] do_fork+0x10b/0x271
[<ffffffff8100a0e9>] sys_clone+0x23/0x25
[<ffffffff815dda73>] stub_clone+0x13/0x20
[<ffffffffffffffff>] 0xffffffffffffffff
I fixed the spelling of sysctl_header so the code actually
compiles. -- EWB.
Reported-by: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
Signed-off-by: Vlad Yasevich <vyasevich@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
388 lines
9.3 KiB
C
388 lines
9.3 KiB
C
/* SCTP kernel implementation
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* (C) Copyright IBM Corp. 2002, 2004
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* Copyright (c) 2002 Intel Corp.
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*
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* This file is part of the SCTP kernel implementation
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*
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* Sysctl related interfaces for SCTP.
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*
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* This SCTP implementation is free software;
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* you can redistribute it and/or modify it under the terms of
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* the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This SCTP implementation is distributed in the hope that it
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* will be useful, but WITHOUT ANY WARRANTY; without even the implied
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* ************************
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU CC; see the file COPYING. If not, write to
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* the Free Software Foundation, 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Please send any bug reports or fixes you make to the
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* email address(es):
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* lksctp developers <lksctp-developers@lists.sourceforge.net>
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*
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* Or submit a bug report through the following website:
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* http://www.sf.net/projects/lksctp
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*
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* Written or modified by:
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* Mingqin Liu <liuming@us.ibm.com>
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* Jon Grimm <jgrimm@us.ibm.com>
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* Ardelle Fan <ardelle.fan@intel.com>
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* Ryan Layer <rmlayer@us.ibm.com>
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* Sridhar Samudrala <sri@us.ibm.com>
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*
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* Any bugs reported given to us we will try to fix... any fixes shared will
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* be incorporated into the next SCTP release.
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*/
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#include <net/sctp/structs.h>
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#include <net/sctp/sctp.h>
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#include <linux/sysctl.h>
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static int zero = 0;
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static int one = 1;
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static int timer_max = 86400000; /* ms in one day */
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static int int_max = INT_MAX;
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static int sack_timer_min = 1;
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static int sack_timer_max = 500;
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static int addr_scope_max = 3; /* check sctp_scope_policy_t in include/net/sctp/constants.h for max entries */
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static int rwnd_scale_max = 16;
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static unsigned long max_autoclose_min = 0;
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static unsigned long max_autoclose_max =
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(MAX_SCHEDULE_TIMEOUT / HZ > UINT_MAX)
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? UINT_MAX : MAX_SCHEDULE_TIMEOUT / HZ;
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extern long sysctl_sctp_mem[3];
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extern int sysctl_sctp_rmem[3];
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extern int sysctl_sctp_wmem[3];
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static int proc_sctp_do_hmac_alg(ctl_table *ctl,
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int write,
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void __user *buffer, size_t *lenp,
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loff_t *ppos);
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static ctl_table sctp_table[] = {
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{
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.procname = "sctp_mem",
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.data = &sysctl_sctp_mem,
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.maxlen = sizeof(sysctl_sctp_mem),
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.mode = 0644,
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.proc_handler = proc_doulongvec_minmax
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},
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{
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.procname = "sctp_rmem",
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.data = &sysctl_sctp_rmem,
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.maxlen = sizeof(sysctl_sctp_rmem),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{
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.procname = "sctp_wmem",
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.data = &sysctl_sctp_wmem,
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.maxlen = sizeof(sysctl_sctp_wmem),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{ /* sentinel */ }
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};
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static ctl_table sctp_net_table[] = {
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{
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.procname = "rto_initial",
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.data = &init_net.sctp.rto_initial,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = &one,
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.extra2 = &timer_max
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},
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{
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.procname = "rto_min",
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.data = &init_net.sctp.rto_min,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = &one,
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.extra2 = &timer_max
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},
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{
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.procname = "rto_max",
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.data = &init_net.sctp.rto_max,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = &one,
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.extra2 = &timer_max
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},
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{
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.procname = "rto_alpha_exp_divisor",
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.data = &init_net.sctp.rto_alpha,
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.maxlen = sizeof(int),
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.mode = 0444,
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.proc_handler = proc_dointvec,
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},
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{
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.procname = "rto_beta_exp_divisor",
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.data = &init_net.sctp.rto_beta,
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.maxlen = sizeof(int),
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.mode = 0444,
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.proc_handler = proc_dointvec,
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},
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{
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.procname = "max_burst",
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.data = &init_net.sctp.max_burst,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = &zero,
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.extra2 = &int_max
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},
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{
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.procname = "cookie_preserve_enable",
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.data = &init_net.sctp.cookie_preserve_enable,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{
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.procname = "cookie_hmac_alg",
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.maxlen = 8,
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.mode = 0644,
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.proc_handler = proc_sctp_do_hmac_alg,
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},
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{
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.procname = "valid_cookie_life",
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.data = &init_net.sctp.valid_cookie_life,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = &one,
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.extra2 = &timer_max
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},
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{
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.procname = "sack_timeout",
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.data = &init_net.sctp.sack_timeout,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = &sack_timer_min,
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.extra2 = &sack_timer_max,
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},
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{
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.procname = "hb_interval",
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.data = &init_net.sctp.hb_interval,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = &one,
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.extra2 = &timer_max
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},
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{
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.procname = "association_max_retrans",
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.data = &init_net.sctp.max_retrans_association,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = &one,
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.extra2 = &int_max
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},
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{
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.procname = "path_max_retrans",
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.data = &init_net.sctp.max_retrans_path,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = &one,
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.extra2 = &int_max
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},
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{
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.procname = "max_init_retransmits",
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.data = &init_net.sctp.max_retrans_init,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = &one,
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.extra2 = &int_max
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},
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{
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.procname = "pf_retrans",
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.data = &init_net.sctp.pf_retrans,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = &zero,
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.extra2 = &int_max
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},
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{
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.procname = "sndbuf_policy",
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.data = &init_net.sctp.sndbuf_policy,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{
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.procname = "rcvbuf_policy",
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.data = &init_net.sctp.rcvbuf_policy,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{
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.procname = "default_auto_asconf",
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.data = &init_net.sctp.default_auto_asconf,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{
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.procname = "addip_enable",
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.data = &init_net.sctp.addip_enable,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{
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.procname = "addip_noauth_enable",
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.data = &init_net.sctp.addip_noauth,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{
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.procname = "prsctp_enable",
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.data = &init_net.sctp.prsctp_enable,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{
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.procname = "auth_enable",
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.data = &init_net.sctp.auth_enable,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{
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.procname = "addr_scope_policy",
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.data = &init_net.sctp.scope_policy,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = &zero,
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.extra2 = &addr_scope_max,
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},
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{
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.procname = "rwnd_update_shift",
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.data = &init_net.sctp.rwnd_upd_shift,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.extra1 = &one,
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.extra2 = &rwnd_scale_max,
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},
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{
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.procname = "max_autoclose",
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.data = &init_net.sctp.max_autoclose,
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.maxlen = sizeof(unsigned long),
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.mode = 0644,
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.proc_handler = &proc_doulongvec_minmax,
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.extra1 = &max_autoclose_min,
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.extra2 = &max_autoclose_max,
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},
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{ /* sentinel */ }
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};
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static int proc_sctp_do_hmac_alg(ctl_table *ctl,
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int write,
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void __user *buffer, size_t *lenp,
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loff_t *ppos)
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{
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struct net *net = current->nsproxy->net_ns;
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char tmp[8];
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ctl_table tbl;
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int ret;
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int changed = 0;
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char *none = "none";
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memset(&tbl, 0, sizeof(struct ctl_table));
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if (write) {
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tbl.data = tmp;
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tbl.maxlen = 8;
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} else {
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tbl.data = net->sctp.sctp_hmac_alg ? : none;
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tbl.maxlen = strlen(tbl.data);
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}
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ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
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if (write) {
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#ifdef CONFIG_CRYPTO_MD5
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if (!strncmp(tmp, "md5", 3)) {
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net->sctp.sctp_hmac_alg = "md5";
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changed = 1;
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}
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#endif
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#ifdef CONFIG_CRYPTO_SHA1
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if (!strncmp(tmp, "sha1", 4)) {
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net->sctp.sctp_hmac_alg = "sha1";
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changed = 1;
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}
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#endif
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if (!strncmp(tmp, "none", 4)) {
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net->sctp.sctp_hmac_alg = NULL;
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changed = 1;
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}
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if (!changed)
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ret = -EINVAL;
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}
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return ret;
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}
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int sctp_sysctl_net_register(struct net *net)
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{
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struct ctl_table *table;
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int i;
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table = kmemdup(sctp_net_table, sizeof(sctp_net_table), GFP_KERNEL);
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if (!table)
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return -ENOMEM;
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for (i = 0; table[i].data; i++)
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table[i].data += (char *)(&net->sctp) - (char *)&init_net.sctp;
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net->sctp.sysctl_header = register_net_sysctl(net, "net/sctp", table);
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return 0;
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}
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void sctp_sysctl_net_unregister(struct net *net)
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{
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struct ctl_table *table;
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table = net->sctp.sysctl_header->ctl_table_arg;
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unregister_net_sysctl_table(net->sctp.sysctl_header);
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kfree(table);
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}
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static struct ctl_table_header * sctp_sysctl_header;
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/* Sysctl registration. */
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void sctp_sysctl_register(void)
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{
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sctp_sysctl_header = register_net_sysctl(&init_net, "net/sctp", sctp_table);
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}
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/* Sysctl deregistration. */
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void sctp_sysctl_unregister(void)
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{
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unregister_net_sysctl_table(sctp_sysctl_header);
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}
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