fix crash during --shutdonw

2 files changed, 9 insertions, 5 deletions

diff --git a/src/firejail/shutdown.c b/src/firejail/shutdown.c
index fbfe1765b..d1be6eed4 100644
--- a/src/firejail/shutdown.c
+++ b/src/firejail/shutdown.c
@@ -36,8 +36,10 @@ void shut(pid_t pid) {
                 }
                 free(comm);
         }
-        else
-                errExit("/proc/PID/comm");
+        else {
+                fprintf(stderr, "Error: cannot find process %d\n", pid);
+                exit(1);
+        }
 
         // check privileges for non-root users
         uid_t uid = getuid();
diff --git a/src/firejail/util.c b/src/firejail/util.c
index b15b719b7..6a7318c4b 100644
--- a/src/firejail/util.c
+++ b/src/firejail/util.c
@@ -647,9 +647,11 @@ int find_child(pid_t parent, pid_t *child) {
                                 if (parent == atoi(ptr)) {
                                         // we don't want /usr/bin/xdg-dbus-proxy!
                                         char *cmdline = pid_proc_cmdline(pid);
-                                        if (strncmp(cmdline, XDG_DBUS_PROXY_PATH, strlen(XDG_DBUS_PROXY_PATH)) != 0)
-                                                *child = pid;
-                                        free(cmdline);
+                                        if (cmdline) {
+                                                if (strncmp(cmdline, XDG_DBUS_PROXY_PATH, strlen(XDG_DBUS_PROXY_PATH)) != 0)
+                                                        *child = pid;
+                                                free(cmdline);
+                                        }
                                 }
                                 break;            // stop reading the file
                         }