diff options
| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2024-10-22 16:48:25 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-10-29 19:24:08 +0100 |
| commit | 7515e37bce5c428a56a9b04ea7e96b3f53f17150 (patch) | |
| tree | c279a81ea4f771714b18b7fb8c3bf77307ea6bae | |
| parent | mctp i2c: handle NULL header address (diff) | |
| download | linux-7515e37bce5c428a56a9b04ea7e96b3f53f17150.tar.xz linux-7515e37bce5c428a56a9b04ea7e96b3f53f17150.zip | |
gtp: allow -1 to be specified as file description from userspace
Existing user space applications maintained by the Osmocom project are
breaking since a recent fix that addresses incorrect error checking.
Restore operation for user space programs that specify -1 as file
descriptor to skip GTPv0 or GTPv1 only sockets.
Fixes: defd8b3c37b0 ("gtp: fix a potential NULL pointer dereference")
Reported-by: Pau Espin Pedrol <pespin@sysmocom.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Tested-by: Oliver Smith <osmith@sysmocom.de>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20241022144825.66740-1-pablo@netfilter.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/gtp.c | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c index a60bfb1abb7f..70f981887518 100644 --- a/drivers/net/gtp.c +++ b/drivers/net/gtp.c @@ -1702,20 +1702,24 @@ static int gtp_encap_enable(struct gtp_dev *gtp, struct nlattr *data[]) return -EINVAL; if (data[IFLA_GTP_FD0]) { - u32 fd0 = nla_get_u32(data[IFLA_GTP_FD0]); + int fd0 = nla_get_u32(data[IFLA_GTP_FD0]); - sk0 = gtp_encap_enable_socket(fd0, UDP_ENCAP_GTP0, gtp); - if (IS_ERR(sk0)) - return PTR_ERR(sk0); + if (fd0 >= 0) { + sk0 = gtp_encap_enable_socket(fd0, UDP_ENCAP_GTP0, gtp); + if (IS_ERR(sk0)) + return PTR_ERR(sk0); + } } if (data[IFLA_GTP_FD1]) { - u32 fd1 = nla_get_u32(data[IFLA_GTP_FD1]); + int fd1 = nla_get_u32(data[IFLA_GTP_FD1]); - sk1u = gtp_encap_enable_socket(fd1, UDP_ENCAP_GTP1U, gtp); - if (IS_ERR(sk1u)) { - gtp_encap_disable_sock(sk0); - return PTR_ERR(sk1u); + if (fd1 >= 0) { + sk1u = gtp_encap_enable_socket(fd1, UDP_ENCAP_GTP1U, gtp); + if (IS_ERR(sk1u)) { + gtp_encap_disable_sock(sk0); + return PTR_ERR(sk1u); + } } } |