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| author | Jason Gunthorpe | 2019-01-09 00:27:06 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2019-01-22 21:40:30 +0100 |
| commit | 3dc241b8fa94650ce5712283334109493516b713 (patch) | |
| tree | 53ed9715db901699ff51c75d1eb339648af84298 /net/packet | |
| parent | net: bridge: fix a bug on using a neighbour cache entry without checking its ... (diff) | |
| download | kernel-qcow2-linux-3dc241b8fa94650ce5712283334109493516b713.tar.gz kernel-qcow2-linux-3dc241b8fa94650ce5712283334109493516b713.tar.xz kernel-qcow2-linux-3dc241b8fa94650ce5712283334109493516b713.zip | |
packet: Do not leak dev refcounts on error exit
[ Upstream commit d972f3dce8d161e2142da0ab1ef25df00e2f21a9 ]
'dev' is non NULL when the addr_len check triggers so it must goto a label
that does the dev_put otherwise dev will have a leaked refcount.
This bug causes the ib_ipoib module to become unloadable when using
systemd-network as it triggers this check on InfiniBand links.
Fixes: 99137b7888f4 ("packet: validate address length")
Reported-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/packet')
| -rw-r--r-- | net/packet/af_packet.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index 0541cfc93440..b6ea0fadb34f 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -2628,7 +2628,7 @@ static int tpacket_snd(struct packet_sock *po, struct msghdr *msg) 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; + goto out_put; } err = -ENXIO; @@ -2828,7 +2828,7 @@ static int packet_snd(struct socket *sock, struct msghdr *msg, size_t len) 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; + goto out_unlock; } err = -ENXIO; |