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path: root/net/packet/af_packet.c
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Diffstat (limited to 'net/packet/af_packet.c')
-rw-r--r--net/packet/af_packet.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 24412e8f4061..14df2fcf6138 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -2660,8 +2660,10 @@ static int tpacket_snd(struct packet_sock *po, struct msghdr *msg)
sll_addr)))
goto out;
proto = saddr->sll_protocol;
- addr = saddr->sll_addr;
+ addr = saddr->sll_halen ? saddr->sll_addr : NULL;
dev = dev_get_by_index(sock_net(&po->sk), saddr->sll_ifindex);
+ if (addr && dev && saddr->sll_halen < dev->addr_len)
+ goto out_put;
}
err = -ENXIO;
@@ -2857,8 +2859,10 @@ static int packet_snd(struct socket *sock, struct msghdr *msg, size_t len)
if (msg->msg_namelen < (saddr->sll_halen + offsetof(struct sockaddr_ll, sll_addr)))
goto out;
proto = saddr->sll_protocol;
- addr = saddr->sll_addr;
+ addr = saddr->sll_halen ? saddr->sll_addr : NULL;
dev = dev_get_by_index(sock_net(sk), saddr->sll_ifindex);
+ if (addr && dev && saddr->sll_halen < dev->addr_len)
+ goto out_unlock;
}
err = -ENXIO;
@@ -4312,7 +4316,7 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u,
rb->frames_per_block = req->tp_block_size / req->tp_frame_size;
if (unlikely(rb->frames_per_block == 0))
goto out;
- if (unlikely(req->tp_block_size > UINT_MAX / req->tp_block_nr))
+ if (unlikely(rb->frames_per_block > UINT_MAX / req->tp_block_nr))
goto out;
if (unlikely((rb->frames_per_block * req->tp_block_nr) !=
req->tp_frame_nr))