Struct ca is copied from userspace. It is not checked whether the "device"
field is NULL terminated. This potentially leads to BUG() inside of
alloc_netdev_mqs() and/or information leak by creating a device with a name
made of contents of kernel stack.
Signed-off-by: Vasiliy Kulikov <segoon@xxxxxxxxxxxx>
---
Compile tested.
net/bluetooth/bnep/sock.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/net/bluetooth/bnep/sock.c b/net/bluetooth/bnep/sock.c
index 2862f53..30faaf1 100644
--- a/net/bluetooth/bnep/sock.c
+++ b/net/bluetooth/bnep/sock.c
@@ -88,6 +88,7 @@ static int bnep_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long
sockfd_put(nsock);
return -EBADFD;
}
+ ca.device[sizeof(ca.device)-1] = 0;
err = bnep_add_connection(&ca, nsock);
if (!err) {
--
1.7.0.4
--
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