diff options
| author | Xiaoming Ni <nixiaoming@huawei.com> | 2021-03-25 11:51:13 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-14 08:41:57 +0200 |
| commit | a12a2fa9a129d3200065fde95f6eb0a98672a2c3 (patch) | |
| tree | c6bd2dd28a8b1aae67f1760325740e85b0e76373 /security | |
| parent | 568ac94df580b1a65837dc299e8758635e7b1423 (diff) | |
| download | linux-stable-a12a2fa9a129d3200065fde95f6eb0a98672a2c3.tar.gz linux-stable-a12a2fa9a129d3200065fde95f6eb0a98672a2c3.tar.bz2 linux-stable-a12a2fa9a129d3200065fde95f6eb0a98672a2c3.zip | |
nfc: Avoid endless loops caused by repeated llcp_sock_connect()
commit 4b5db93e7f2afbdfe3b78e37879a85290187e6f1 upstream.
When sock_wait_state() returns -EINPROGRESS, "sk->sk_state" is
LLCP_CONNECTING. In this case, llcp_sock_connect() is repeatedly invoked,
nfc_llcp_sock_link() will add sk to local->connecting_sockets twice.
sk->sk_node->next will point to itself, that will make an endless loop
and hang-up the system.
To fix it, check whether sk->sk_state is LLCP_CONNECTING in
llcp_sock_connect() to avoid repeated invoking.
Fixes: b4011239a08e ("NFC: llcp: Fix non blocking sockets connections")
Reported-by: "kiyin(尹亮)" <kiyin@tencent.com>
Link: https://www.openwall.com/lists/oss-security/2020/11/01/1
Cc: <stable@vger.kernel.org> #v3.11
Signed-off-by: Xiaoming Ni <nixiaoming@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'security')
0 files changed, 0 insertions, 0 deletions