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| author | Cong Wang <xiyou.wangcong@gmail.com> | 2018-04-06 18:54:52 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-04-08 12:34:29 -0400 |
| commit | e41f0548473eb7b6499bd8482474e30ae6d31220 (patch) | |
| tree | 4704a448a00e5ab58d5b5972a6a47629ea8df610 /net/tipc/socket.c | |
| parent | 81e98370293afcb58340ce8bd71af7b97f925c26 (diff) | |
| download | linux-e41f0548473eb7b6499bd8482474e30ae6d31220.tar.gz | |
tipc: use the right skb in tipc_sk_fill_sock_diag()
Commit 4b2e6877b879 ("tipc: Fix namespace violation in tipc_sk_fill_sock_diag")
tried to fix the crash but failed, the crash is still 100% reproducible
with it.
In tipc_sk_fill_sock_diag(), skb is the diag dump we are filling, it is not
correct to retrieve its NETLINK_CB(), instead, like other protocol diag,
we should use NETLINK_CB(cb->skb).sk here.
Reported-by: <syzbot+326e587eff1074657718@syzkaller.appspotmail.com>
Fixes: 4b2e6877b879 ("tipc: Fix namespace violation in tipc_sk_fill_sock_diag")
Fixes: c30b70deb5f4 (tipc: implement socket diagnostics for AF_TIPC)
Cc: GhantaKrishnamurthy MohanKrishna <mohan.krishna.ghanta.krishnamurthy@ericsson.com>
Cc: Jon Maloy <jon.maloy@ericsson.com>
Cc: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc/socket.c')
| -rw-r--r-- | net/tipc/socket.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/net/tipc/socket.c b/net/tipc/socket.c index cee6674a3bf4..1fd1c8b5ce03 100644 --- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -3257,8 +3257,8 @@ out: } EXPORT_SYMBOL(tipc_nl_sk_walk); -int tipc_sk_fill_sock_diag(struct sk_buff *skb, struct tipc_sock *tsk, - u32 sk_filter_state, +int tipc_sk_fill_sock_diag(struct sk_buff *skb, struct netlink_callback *cb, + struct tipc_sock *tsk, u32 sk_filter_state, u64 (*tipc_diag_gen_cookie)(struct sock *sk)) { struct sock *sk = &tsk->sk; @@ -3280,7 +3280,7 @@ int tipc_sk_fill_sock_diag(struct sk_buff *skb, struct tipc_sock *tsk, nla_put_u32(skb, TIPC_NLA_SOCK_TIPC_STATE, (u32)sk->sk_state) || nla_put_u32(skb, TIPC_NLA_SOCK_INO, sock_i_ino(sk)) || nla_put_u32(skb, TIPC_NLA_SOCK_UID, - from_kuid_munged(sk_user_ns(NETLINK_CB(skb).sk), + from_kuid_munged(sk_user_ns(NETLINK_CB(cb->skb).sk), sock_i_uid(sk))) || nla_put_u64_64bit(skb, TIPC_NLA_SOCK_COOKIE, tipc_diag_gen_cookie(sk), |