diff options
| author | Chen Zhongjin <chenzhongjin@huawei.com> | 2022-11-03 17:07:13 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-12-02 17:41:06 +0100 |
| commit | a48b345b87f95ee875f97a490c3081d010a65ec5 (patch) | |
| tree | 4e7c0957317c5cdb57cce5112dd97cabff0c24d9 /net/ipv6 | |
| parent | 19989e16359585b8303ec750bf86f8ede70ba718 (diff) | |
xfrm: Fix ignored return value in xfrm6_init()
[ Upstream commit 40781bfb836eda57d19c0baa37c7e72590e05fdc ]
When IPv6 module initializing in xfrm6_init(), register_pernet_subsys()
is possible to fail but its return value is ignored.
If IPv6 initialization fails later and xfrm6_fini() is called,
removing uninitialized list in xfrm6_net_ops will cause null-ptr-deref:
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 1 PID: 330 Comm: insmod
RIP: 0010:unregister_pernet_operations+0xc9/0x450
Call Trace:
<TASK>
unregister_pernet_subsys+0x31/0x3e
xfrm6_fini+0x16/0x30 [ipv6]
ip6_route_init+0xcd/0x128 [ipv6]
inet6_init+0x29c/0x602 [ipv6]
...
Fix it by catching the error return value of register_pernet_subsys().
Fixes: 8d068875caca ("xfrm: make gc_thresh configurable in all namespaces")
Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/xfrm6_policy.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c index af7a4b8b1e9c..247296e3294b 100644 --- a/net/ipv6/xfrm6_policy.c +++ b/net/ipv6/xfrm6_policy.c @@ -289,9 +289,13 @@ int __init xfrm6_init(void) if (ret) goto out_state; - register_pernet_subsys(&xfrm6_net_ops); + ret = register_pernet_subsys(&xfrm6_net_ops); + if (ret) + goto out_protocol; out: return ret; +out_protocol: + xfrm6_protocol_fini(); out_state: xfrm6_state_fini(); out_policy: |