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author | Yonatan Linik <yonatanlinik@gmail.com> | 2020-12-14 23:25:50 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-02-23 17:53:23 +0300 |
commit | 06ab1e63ec5c72255fae316c59ea9c0475eadac8 (patch) | |
tree | 1871d1728a95327ecb07205ea677739fe00dac37 /net/tls | |
parent | ba2582cd7f20cec3d4c32bcc7a5a6f9645d3a654 (diff) | |
download | linux-06ab1e63ec5c72255fae316c59ea9c0475eadac8.tar.xz |
net: fix proc_fs init handling in af_packet and tls
[ Upstream commit a268e0f2455c32653140775662b40c2b1f1b2efa ]
proc_fs was used, in af_packet, without a surrounding #ifdef,
although there is no hard dependency on proc_fs.
That caused the initialization of the af_packet module to fail
when CONFIG_PROC_FS=n.
Specifically, proc_create_net() was used in af_packet.c,
and when it fails, packet_net_init() returns -ENOMEM.
It will always fail when the kernel is compiled without proc_fs,
because, proc_create_net() for example always returns NULL.
The calling order that starts in af_packet.c is as follows:
packet_init()
register_pernet_subsys()
register_pernet_operations()
__register_pernet_operations()
ops_init()
ops->init() (packet_net_ops.init=packet_net_init())
proc_create_net()
It worked in the past because register_pernet_subsys()'s return value
wasn't checked before this Commit 36096f2f4fa0 ("packet: Fix error path in
packet_init.").
It always returned an error, but was not checked before, so everything
was working even when CONFIG_PROC_FS=n.
The fix here is simply to add the necessary #ifdef.
This also fixes a similar error in tls_proc.c, that was found by Jakub
Kicinski.
Fixes: d26b698dd3cd ("net/tls: add skeleton of MIB statistics")
Fixes: 36096f2f4fa0 ("packet: Fix error path in packet_init")
Signed-off-by: Yonatan Linik <yonatanlinik@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/tls')
-rw-r--r-- | net/tls/tls_proc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/tls/tls_proc.c b/net/tls/tls_proc.c index 3a5dd1e07233..feeceb0e4cb4 100644 --- a/net/tls/tls_proc.c +++ b/net/tls/tls_proc.c @@ -37,9 +37,12 @@ static int tls_statistics_seq_show(struct seq_file *seq, void *v) int __net_init tls_proc_init(struct net *net) { +#ifdef CONFIG_PROC_FS if (!proc_create_net_single("tls_stat", 0444, net->proc_net, tls_statistics_seq_show, NULL)) return -ENOMEM; +#endif /* CONFIG_PROC_FS */ + return 0; } |