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>

conf: set pty_info to NULL after free
e00c0242 · Wolfgang Bumiller · 25796416 · e00c0242
Commit e00c0242 authored Jul 28, 2016 by Wolfgang Bumiller
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conf.c src/lxc/conf.c +1 -0

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--- 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;
 }