From: Eric Dumazet edumazet@google.com
[ 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 --- net/packet/af_packet.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -4316,7 +4316,7 @@ static int packet_set_ring(struct sock * req3->tp_sizeof_priv || req3->tp_feature_req_word) { err = -EINVAL; - goto out; + goto out_free_pg_vec; } } break; @@ -4380,6 +4380,7 @@ static int packet_set_ring(struct sock * 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: