pdrfork(2) tests: catch runaway child for EFAULT test

Reported and tested by:	pho
Reviewed by:	markj
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D55306

This commit is contained in:

Konstantin Belousov

2026-02-16 12:04:26 +02:00

parent d6bf2d14a9

commit 44843695bc

1 changed files with 10 additions and 0 deletions

									
										tests/sys/kern/pdrfork.c
									
		+10
		
												View File
												
				@@ -95,11 +95,21 @@ ATF_TC_WITHOUT_HEAD(efault);

				ATF_TC_BODY(efault, tc)

				{

					void *unmapped;

					pid_t my_pid;

					unmapped = mmap(NULL, PAGE_SIZE, PROT_NONE, MAP_GUARD, -1, 0);

					ATF_REQUIRE(unmapped != MAP_FAILED);

					my_pid = getpid();

					ATF_REQUIRE_ERRNO(EFAULT, pdrfork(unmapped, 0, RFPROC |

					    RFPROCDESC) < 0);

					/*

					 * EFAULT only means that the copyout of the procdesc failed.

					 * The runaway child was created anyway.  Prevent

					 * double-destruction of the atf stuff.

					 */

					if (my_pid != getpid())

						_exit(0);

				}

				/* Invalid combinations of flags should return EINVAL */