[PATCH 1/1] libctrl: only free() msgb if it was alloc()ed

[Alexander Huemer]

Before this patch a SIGABRT was caused when doing e.g.:
$ ncat 127.0.0.1 4249
^C
---
 openbsc/src/libctrl/control_if.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/openbsc/src/libctrl/control_if.c b/openbsc/src/libctrl/control_if.c
index 8198ae6..c395b08 100644
--- a/openbsc/src/libctrl/control_if.c
+++ b/openbsc/src/libctrl/control_if.c
@@ -208,7 +208,7 @@ static int handle_control_read(struct osmo_fd * bfd)
        struct ctrl_connection *ccon;
        struct ipaccess_head *iph;
        struct ipaccess_head_ext *iph_ext;
-       struct msgb *msg;
+       struct msgb *msg = NULL;
        struct ctrl_cmd *cmd;
        struct ctrl_handle *ctrl = bfd->data;
 
@@ -269,7 +269,8 @@ static int handle_control_read(struct osmo_fd * bfd)
 
 err:
        control_close_conn(ccon);
-       msgb_free(msg);
+       if (msg)
+               msgb_free(msg);
        return ret;
 }
 
-- 
1.7.7