Commit fa6882c6 authored by Wang Hai's avatar Wang Hai Committed by Jakub Kicinski

tipc: fix memory leak in tipc_topsrv_start()

kmemleak report a memory leak as follows:

unreferenced object 0xffff88810a596800 (size 512):
  comm "ip", pid 21558, jiffies 4297568990 (age 112.120s)
  hex dump (first 32 bytes):
    00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
    ff ff ff ff ff ff ff ff 00 83 60 b0 ff ff ff ff  ..........`.....
  backtrace:
    [<0000000022bbe21f>] tipc_topsrv_init_net+0x1f3/0xa70
    [<00000000fe15ddf7>] ops_init+0xa8/0x3c0
    [<00000000138af6f2>] setup_net+0x2de/0x7e0
    [<000000008c6807a3>] copy_net_ns+0x27d/0x530
    [<000000006b21adbd>] create_new_namespaces+0x382/0xa30
    [<00000000bb169746>] unshare_nsproxy_namespaces+0xa1/0x1d0
    [<00000000fe2e42bc>] ksys_unshare+0x39c/0x780
    [<0000000009ba3b19>] __x64_sys_unshare+0x2d/0x40
    [<00000000614ad866>] do_syscall_64+0x56/0xa0
    [<00000000a1b5ca3c>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

'srv' is malloced in tipc_topsrv_start() but not free before
leaving from the error handling cases. We need to free it.

Fixes: 5c45ab24 ("tipc: make struct tipc_server private for server.c")
Reported-by: default avatarHulk Robot <hulkci@huawei.com>
Signed-off-by: default avatarWang Hai <wanghai38@huawei.com>
Link: https://lore.kernel.org/r/20201109140913.47370-1-wanghai38@huawei.comSigned-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent e87d24fc
...@@ -664,12 +664,18 @@ static int tipc_topsrv_start(struct net *net) ...@@ -664,12 +664,18 @@ static int tipc_topsrv_start(struct net *net)
ret = tipc_topsrv_work_start(srv); ret = tipc_topsrv_work_start(srv);
if (ret < 0) if (ret < 0)
return ret; goto err_start;
ret = tipc_topsrv_create_listener(srv); ret = tipc_topsrv_create_listener(srv);
if (ret < 0) if (ret < 0)
tipc_topsrv_work_stop(srv); goto err_create;
return 0;
err_create:
tipc_topsrv_work_stop(srv);
err_start:
kfree(srv);
return ret; return ret;
} }
......
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