diff options
Diffstat (limited to 'winsup/cygwin/syscalls.cc')
| -rw-r--r-- | winsup/cygwin/syscalls.cc | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc index a436afd52..02a49b852 100644 --- a/winsup/cygwin/syscalls.cc +++ b/winsup/cygwin/syscalls.cc @@ -124,6 +124,12 @@ dup (int fd) int dup2 (int oldfd, int newfd) { + if (newfd >= OPEN_MAX_MAX) + { + syscall_printf ("-1 = dup2 (%d, %d) (%d too large)", oldfd, newfd, newfd); + set_errno (EBADF); + return -1; + } return cygheap->fdtab.dup2 (oldfd, newfd); } |