Return an error code when a pipe is already present in a slot

2025-09-18 00:54:53 +02:00
parent b0e543177b
commit b3894f1600
1 changed files with 7 additions and 0 deletions
--- a/kernel/syscall/ipcpipe.c
+++ b/kernel/syscall/ipcpipe.c
@ -49,6 +49,13 @@ int32_t SYSCALL5(sys_ipcpipe, pid1, pipenum1, cmd1, buffer1, len1) {
      }

      spinlock_acquire(&proc->pipes_spinlock);
+      if (proc->pipes[pipenum] != NULL) {
+        spinlock_release(&proc->pipes_spinlock);
+        ipc_pipefree(pipe);
+        dlfree(pipe);
+        ret = E_RESOURCEAVAIL;
+        goto done;
+      }
      proc->pipes[pipenum] = pipe;
      spinlock_release(&proc->pipes_spinlock);