Dan Carpenter 9b405c0f84 nfsd: fix double fget() bug in __write_ports_addfd()
[ Upstream commit c034203b6a9dae6751ef4371c18cb77983e30c28 ]

The bug here is that you cannot rely on getting the same socket
from multiple calls to fget() because userspace can influence
that.  This is a kind of double fetch bug.

The fix is to delete the svc_alien_sock() function and instead do
the checking inside the svc_addsock() function.

Fixes: 3064639423c4 ("nfsd: check passed socket's net matches NFSd superblock's one")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: NeilBrown <neilb@suse.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2024-04-10 16:19:28 +02:00
..
2022-08-25 11:40:05 +02:00
2021-09-04 10:25:26 -07:00
2021-07-08 14:03:23 -04:00
2021-08-10 14:18:35 -04:00