Re: [PATCH] nfc: Add sockaddr length checks before accessing sa_family in bind handlers

From: Samuel Ortiz
Date: Thu Jun 22 2017 - 18:42:16 EST

On Tue, Jun 13, 2017 at 06:44:28PM +0200, Mateusz Jurczyk wrote:
> Verify that the caller-provided sockaddr structure is large enough to
> contain the sa_family field, before accessing it in bind() handlers of the
> AF_NFC socket. Since the syscall doesn't enforce a minimum size of the
> corresponding memory region, very short sockaddrs (zero or one byte long)
> result in operating on uninitialized memory while referencing .sa_family.
> Signed-off-by: Mateusz Jurczyk <mjurczyk@xxxxxxxxxx>
> ---
> net/nfc/llcp_sock.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
Applied to nfc-next, thanks.