Fix possible segfault in dbg_detach

If dbg_attach fails, it calls this function to clean up before the
process in added to the main process list, so list_remove() is invalid.

Signed-off-by: Matt Hunter <m@lfurio.us>

1 files changed, 3 insertions, 1 deletions

diff --git a/debugger.c b/debugger.c
index 3902819..2bbf866 100644
--- a/debugger.c
+++ b/debugger.c
@@ -532,7 +532,9 @@ void dbg_detach(struct process *proc) {
     }
 
     free_breakpoints(proc);
-    list_remove(proc);
+    if (proc->next) { /* workaround: its invalid to list_remove() if dbg_attach fails */
+        list_remove(proc);
+    }
     free(proc);
 }