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| author | Erik Hugne <erik.hugne@ericsson.com> | 2014-08-15 16:44:35 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-08-16 20:17:34 -0700 |
| commit | ac32c7f705692b92fe12dcbe88fe87136fdfff6f (patch) | |
| tree | 9338c8e950a138f41d5bc1c2fa9f5a669e88050f /net | |
| parent | 21009686662fd21412ca35def7cb3cc8346e1c3d (diff) | |
| download | linux-stable-ac32c7f705692b92fe12dcbe88fe87136fdfff6f.tar.gz linux-stable-ac32c7f705692b92fe12dcbe88fe87136fdfff6f.tar.bz2 linux-stable-ac32c7f705692b92fe12dcbe88fe87136fdfff6f.zip | |
tipc: fix message importance range check
Commit 3b4f302d8578 ("tipc: eliminate
redundant locking") introduced a bug by removing the sanity check
for message importance, allowing programs to assign any value to
the msg_user field. This will mess up the packet reception logic
and may cause random link resets.
Signed-off-by: Erik Hugne <erik.hugne@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/tipc/port.h | 4 | ||||
| -rw-r--r-- | net/tipc/socket.c | 2 |
2 files changed, 4 insertions, 2 deletions
diff --git a/net/tipc/port.h b/net/tipc/port.h index 3f93454592b6..a69118ff018b 100644 --- a/net/tipc/port.h +++ b/net/tipc/port.h @@ -179,8 +179,10 @@ static inline int tipc_port_importance(struct tipc_port *port) return msg_importance(&port->phdr); } -static inline void tipc_port_set_importance(struct tipc_port *port, int imp) +static inline int tipc_port_set_importance(struct tipc_port *port, int imp) { + if (imp > TIPC_CRITICAL_IMPORTANCE) + return -EINVAL msg_set_importance(&port->phdr, (u32)imp); } diff --git a/net/tipc/socket.c b/net/tipc/socket.c index 7d423ee10897..ff8c8118d56e 100644 --- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -1973,7 +1973,7 @@ static int tipc_setsockopt(struct socket *sock, int lvl, int opt, switch (opt) { case TIPC_IMPORTANCE: - tipc_port_set_importance(port, value); + res = tipc_port_set_importance(port, value); break; case TIPC_SRC_DROPPABLE: if (sock->type != SOCK_STREAM) |