linux_old1/net/packet
Alexander Potapenko fd2c83b357 net/packet: check length in getsockopt() called with PACKET_HDRLEN
In the case getsockopt() is called with PACKET_HDRLEN and optlen < 4
|val| remains uninitialized and the syscall may behave differently
depending on its value, and even copy garbage to userspace on certain
architectures. To fix this we now return -EINVAL if optlen is too small.

This bug has been detected with KMSAN.

Signed-off-by: Alexander Potapenko <glider@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-25 14:05:52 -04:00
..
Kconfig packet: Diag core and basic socket info dumping 2012-08-14 16:56:33 -07:00
Makefile packet: Diag core and basic socket info dumping 2012-08-14 16:56:33 -07:00
af_packet.c net/packet: check length in getsockopt() called with PACKET_HDRLEN 2017-04-25 14:05:52 -04:00
diag.c packet: pdiag_put_ring() should return TX_RING info for TPACKET_V3 2017-01-10 21:02:42 -05:00
internal.h packet: add classic BPF fanout mode 2015-08-17 14:22:47 -07:00