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| author | Chan Shu Tak, Alex <alexchan@task.com.hk> | 2019-12-19 09:16:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-12 14:21:45 +0300 |
| commit | 5485d62cf5fd2bfc1a4820d9432f7ba4b44e50fe (patch) | |
| tree | 5fc7132ec3243347e439def0e7810adc74130987 /net/llc | |
| parent | 7a5f6b322e9d470ef1ab6c39f3dba7dc70716ceb (diff) | |
| download | linux-5485d62cf5fd2bfc1a4820d9432f7ba4b44e50fe.tar.xz | |
llc2: Fix return statement of llc_stat_ev_rx_null_dsap_xid_c (and _test_c)
[ Upstream commit af1c0e4e00f3cc76cb136ebf2e2c04e8b6446285 ]
When a frame with NULL DSAP is received, llc_station_rcv is called.
In turn, llc_stat_ev_rx_null_dsap_xid_c is called to check if it is a NULL
XID frame. The return statement of llc_stat_ev_rx_null_dsap_xid_c returns 1
when the incoming frame is not a NULL XID frame and 0 otherwise. Hence, a
NULL XID response is returned unexpectedly, e.g. when the incoming frame is
a NULL TEST command.
To fix the error, simply remove the conditional operator.
A similar error in llc_stat_ev_rx_null_dsap_test_c is also fixed.
Signed-off-by: Chan Shu Tak, Alex <alexchan@task.com.hk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/llc')
| -rw-r--r-- | net/llc/llc_station.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/llc/llc_station.c b/net/llc/llc_station.c index 204a8351efff..c29170e767a8 100644 --- a/net/llc/llc_station.c +++ b/net/llc/llc_station.c @@ -32,7 +32,7 @@ static int llc_stat_ev_rx_null_dsap_xid_c(struct sk_buff *skb) return LLC_PDU_IS_CMD(pdu) && /* command PDU */ LLC_PDU_TYPE_IS_U(pdu) && /* U type PDU */ LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_XID && - !pdu->dsap ? 0 : 1; /* NULL DSAP value */ + !pdu->dsap; /* NULL DSAP value */ } static int llc_stat_ev_rx_null_dsap_test_c(struct sk_buff *skb) @@ -42,7 +42,7 @@ static int llc_stat_ev_rx_null_dsap_test_c(struct sk_buff *skb) return LLC_PDU_IS_CMD(pdu) && /* command PDU */ LLC_PDU_TYPE_IS_U(pdu) && /* U type PDU */ LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_TEST && - !pdu->dsap ? 0 : 1; /* NULL DSAP */ + !pdu->dsap; /* NULL DSAP */ } static int llc_station_ac_send_xid_r(struct sk_buff *skb) |