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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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5ae6acf1d0
Recently added smc_sysctl_net_exit() forgot to free
the memory allocated from smc_sysctl_net_init()
for non initial network namespace.
Fixes: 462791bbfa ("net/smc: add sysctl interface for SMC")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Cc: Tony Lu <tonylu@linux.alibaba.com>
Cc: Dust Li <dust.li@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
70 lines
1.4 KiB
C
70 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Shared Memory Communications over RDMA (SMC-R) and RoCE
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*
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* smc_sysctl.c: sysctl interface to SMC subsystem.
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*
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* Copyright (c) 2022, Alibaba Inc.
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*
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* Author: Tony Lu <tonylu@linux.alibaba.com>
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*
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*/
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#include <linux/init.h>
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#include <linux/sysctl.h>
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#include <net/net_namespace.h>
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#include "smc.h"
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#include "smc_sysctl.h"
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static struct ctl_table smc_table[] = {
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{
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.procname = "autocorking_size",
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.data = &init_net.smc.sysctl_autocorking_size,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = proc_douintvec,
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},
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{ }
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};
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int __net_init smc_sysctl_net_init(struct net *net)
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{
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struct ctl_table *table;
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table = smc_table;
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if (!net_eq(net, &init_net)) {
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int i;
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table = kmemdup(table, sizeof(smc_table), GFP_KERNEL);
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if (!table)
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goto err_alloc;
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for (i = 0; i < ARRAY_SIZE(smc_table) - 1; i++)
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table[i].data += (void *)net - (void *)&init_net;
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}
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net->smc.smc_hdr = register_net_sysctl(net, "net/smc", table);
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if (!net->smc.smc_hdr)
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goto err_reg;
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net->smc.sysctl_autocorking_size = SMC_AUTOCORKING_DEFAULT_SIZE;
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return 0;
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err_reg:
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if (!net_eq(net, &init_net))
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kfree(table);
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err_alloc:
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return -ENOMEM;
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}
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void __net_exit smc_sysctl_net_exit(struct net *net)
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{
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struct ctl_table *table;
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table = net->smc.smc_hdr->ctl_table_arg;
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unregister_net_sysctl_table(net->smc.smc_hdr);
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if (!net_eq(net, &init_net))
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kfree(table);
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}
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