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| author | Willem de Bruijn <willemb@google.com> | 2016-06-07 12:06:34 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-06-09 23:41:03 -0700 |
| commit | 719c44d340beeecd22cbda91b00ef55585b3c1a0 (patch) | |
| tree | 5e53d5a92c7548ee9464b2133ad4651c23871297 /include/net | |
| parent | ca8bdaf13abbdcbb12ff12164aa2d5b522ec524d (diff) | |
| download | linux-719c44d340beeecd22cbda91b00ef55585b3c1a0.tar.bz2 | |
packet: compat support for sock_fprog
Socket option PACKET_FANOUT_DATA takes a struct sock_fprog as argument
if PACKET_FANOUT has mode PACKET_FANOUT_CBPF. This structure contains
a pointer into user memory. If userland is 32-bit and kernel is 64-bit
the two disagree about the layout of struct sock_fprog.
Add compat setsockopt support to convert a 32-bit compat_sock_fprog to
a 64-bit sock_fprog. This is analogous to compat_sock_fprog support for
SO_REUSEPORT added in commit 1957598840f4 ("soreuseport: add compat
case for setsockopt SO_ATTACH_REUSEPORT_CBPF").
Reported-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/compat.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/compat.h b/include/net/compat.h index 48103cf94e97..13de0ccaa059 100644 --- a/include/net/compat.h +++ b/include/net/compat.h @@ -42,6 +42,7 @@ int compat_sock_get_timestampns(struct sock *, struct timespec __user *); int get_compat_msghdr(struct msghdr *, struct compat_msghdr __user *, struct sockaddr __user **, struct iovec **); +struct sock_fprog __user *get_compat_bpf_fprog(char __user *optval); asmlinkage long compat_sys_sendmsg(int, struct compat_msghdr __user *, unsigned int); asmlinkage long compat_sys_sendmmsg(int, struct compat_mmsghdr __user *, |