From: Eric Dumazet <edumazet@xxxxxxxxxx>
[ 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@xxxxxxxxxx>
Cc: Sowmini Varadhan <sowmini.varadhan@xxxxxxxxxx>
Reported-by: syzbot <syzkaller@xxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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
@@ -4354,7 +4354,7 @@ 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;
@@ -4418,6 +4418,7 @@ 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:
