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Bluetooth: bnep: fix buffer overflow

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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@openwall.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
This commit is contained in:
Vasiliy Kulikov 2011-02-14 13:54:31 +03:00 committed by Gustavo F. Padovan
parent d9f51b51db
commit 43629f8f5e
1 changed files with 1 additions and 0 deletions
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net/bluetooth/bnep/sock.c
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@ -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) {