diff options
| author | Jeremy Cline <[email protected]> | 2018-07-27 22:43:02 +0000 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2018-07-28 22:43:30 -0700 |
| commit | e978de7a6d382ec378830ca2cf38e902df0b6d84 (patch) | |
| tree | 2d9f35288b60c467f18e5e81891c0a198a8adad3 | |
| parent | c8e8cd579bb4265651df8223730105341e61a2d1 (diff) | |
net: socket: Fix potential spectre v1 gadget in sock_is_registered
'family' can be a user-controlled value, so sanitize it after the bounds
check to avoid speculative out-of-bounds access.
Cc: Josh Poimboeuf <[email protected]>
Cc: [email protected]
Signed-off-by: Jeremy Cline <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
| -rw-r--r-- | net/socket.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/socket.c b/net/socket.c index 4ac3b834cce9..8c24d5dc4bc8 100644 --- a/net/socket.c +++ b/net/socket.c @@ -2690,7 +2690,8 @@ EXPORT_SYMBOL(sock_unregister); bool sock_is_registered(int family) { - return family < NPROTO && rcu_access_pointer(net_families[family]); + return family < NPROTO && + rcu_access_pointer(net_families[array_index_nospec(family, NPROTO)]); } static int __init sock_init(void) |