diff options
| author | Eric Dumazet <edumazet@google.com> | 2019-06-24 02:38:20 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-03 13:16:01 +0200 |
| commit | dc948de356f4348cc8e65f0435ea82d12c1219d3 (patch) | |
| tree | 1e5aa9a52d2e5bb18a521dfc85d20ecb74f4b1d0 | |
| parent | 8b029106d6288d9dc763da6b38213007f3a03bb3 (diff) | |
net/packet: fix memory leak in packet_set_ring()
[ Upstream commit 55655e3d1197fff16a7a05088fb0e5eba50eac55 ]
syzbot found we can leak memory in packet_set_ring(), if user application
provides buggy parameters.
Fixes: 7f953ab2ba46 ("af_packet: TX_RING support for TPACKET_V3")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/packet/af_packet.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index 0d969b740185..047ee7ff7038 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -4354,7 +4354,7 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u, req3->tp_sizeof_priv || req3->tp_feature_req_word) { err = -EINVAL; - goto out; + goto out_free_pg_vec; } } break; @@ -4418,6 +4418,7 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u, prb_shutdown_retire_blk_timer(po, rb_queue); } +out_free_pg_vec: if (pg_vec) free_pg_vec(pg_vec, order, req->tp_block_nr); out: |