conf: set pty_info to NULL after free

This fixes a double free corruption on container-requested
reboots when lxc_spawn() fails before receiving the ttys, as
lxc_fini() (part of __lxc_start()'s cleanup) calls
lxc_delete_tty().

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>

diff --git a/src/lxc/conf.c b/src/lxc/conf.c
index 48a29787d70ea1be59a2310bcf1e644d0db93e0b..1e330ac9dc2a01dcec29ec0c9b609c48b2d33150 100644 (file)
--- a/src/lxc/conf.c
+++ b/src/lxc/conf.c
@@ -3327,6 +3327,7 @@ void lxc_delete_tty(struct lxc_tty_info *tty_info)
        }
 
        free(tty_info->pty_info);
+       tty_info->pty_info = NULL;
        tty_info->nbtty = 0;
 }