diff mbox series

[hurd,commited] hurd spawni: Fix reauthenticating closed fds

Message ID 20220505001546.1472436-1-samuel.thibault@ens-lyon.org
State New
Headers show
Series [hurd,commited] hurd spawni: Fix reauthenticating closed fds | expand

Commit Message

Samuel Thibault May 5, 2022, 12:15 a.m. UTC 
When an fd is closed, the port cell remains, but the port becomes
MACH_PORT_NULL, so we have to guard against it.
---
 sysdeps/mach/hurd/spawni.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/sysdeps/mach/hurd/spawni.c b/sysdeps/mach/hurd/spawni.c
index f19b688411..ffc62e660e 100644
--- a/sysdeps/mach/hurd/spawni.c
+++ b/sysdeps/mach/hurd/spawni.c
@@ -154,7 +154,7 @@  __spawni (pid_t *pid, const char *file,
      reauthenticated, or was newly opened on behalf of the child.  */
   error_t reauthenticate_fd (int fd)
     {
-      if (dtable_cells[fd] != NULL)
+      if (dtable_cells[fd] != NULL && dtable[fd] != MACH_PORT_NULL)
 	{
 	  file_t newfile;
 	  mach_port_t ref = __mach_reply_port ();