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authorMao Wenan <maowenan@huawei.com>2019-03-01 23:06:40 +0800
committerDavid S. Miller <davem@davemloft.net>2019-03-02 00:53:23 -0800
commit07f12b26e21ab359261bf75cfcb424fdc7daeb6d (patch)
treec93fbe1e6232f21eb34b1ee04359dc9c10e7cde3 /net/ipv6
parentnet: dsa: mv88e6xxx: Fix statistics on mv88e6161 (diff)
downloadlinux-dev-07f12b26e21ab359261bf75cfcb424fdc7daeb6d.tar.xz
linux-dev-07f12b26e21ab359261bf75cfcb424fdc7daeb6d.zip
net: sit: fix memory leak in sit_init_net()
If register_netdev() is failed to register sitn->fb_tunnel_dev, it will go to err_reg_dev and forget to free netdev(sitn->fb_tunnel_dev). BUG: memory leak unreferenced object 0xffff888378daad00 (size 512): comm "syz-executor.1", pid 4006, jiffies 4295121142 (age 16.115s) hex dump (first 32 bytes): 00 e6 ed c0 83 88 ff ff 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000d6dcb63e>] kvmalloc include/linux/mm.h:577 [inline] [<00000000d6dcb63e>] kvzalloc include/linux/mm.h:585 [inline] [<00000000d6dcb63e>] netif_alloc_netdev_queues net/core/dev.c:8380 [inline] [<00000000d6dcb63e>] alloc_netdev_mqs+0x600/0xcc0 net/core/dev.c:8970 [<00000000867e172f>] sit_init_net+0x295/0xa40 net/ipv6/sit.c:1848 [<00000000871019fa>] ops_init+0xad/0x3e0 net/core/net_namespace.c:129 [<00000000319507f6>] setup_net+0x2ba/0x690 net/core/net_namespace.c:314 [<0000000087db4f96>] copy_net_ns+0x1dc/0x330 net/core/net_namespace.c:437 [<0000000057efc651>] create_new_namespaces+0x382/0x730 kernel/nsproxy.c:107 [<00000000676f83de>] copy_namespaces+0x2ed/0x3d0 kernel/nsproxy.c:165 [<0000000030b74bac>] copy_process.part.27+0x231e/0x6db0 kernel/fork.c:1919 [<00000000fff78746>] copy_process kernel/fork.c:1713 [inline] [<00000000fff78746>] _do_fork+0x1bc/0xe90 kernel/fork.c:2224 [<000000001c2e0d1c>] do_syscall_64+0xc8/0x580 arch/x86/entry/common.c:290 [<00000000ec48bd44>] entry_SYSCALL_64_after_hwframe+0x49/0xbe [<0000000039acff8a>] 0xffffffffffffffff Signed-off-by: Mao Wenan <maowenan@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/sit.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index e8a1dabef803..09e440e8dfae 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -1873,6 +1873,7 @@ static int __net_init sit_init_net(struct net *net)
err_reg_dev:
ipip6_dev_free(sitn->fb_tunnel_dev);
+ free_netdev(sitn->fb_tunnel_dev);
err_alloc_dev:
return err;
}