aio(4) tests: do not rely on (int *)-1 being invalid address

Explicitly mmap guard and use it as the invalid address instead.

MFC after:	1 week

This commit is contained in:

Alan Somers

2026-02-16 17:27:02 -07:00

parent 05492ff6f6

commit dc9a8d300b

1 changed files with 6 additions and 1 deletions

									
										tests/sys/aio/aio_test.c
									
		+6
		-1
	
												View File
												
				@@ -39,6 +39,7 @@

				#include <sys/param.h>

				#include <sys/event.h>

				#include <sys/mman.h>

				#include <sys/mdioctl.h>

				#include <sys/module.h>

				#include <sys/resource.h>

				@@ -1665,6 +1666,7 @@ ATF_TC_BODY(aio_writev_efault, tc)

					struct aiocb aio;

					ssize_t buflen;

					char *buffer;

					void *unmapped;

					struct iovec iov[2];

					long seed;

					int fd;

				@@ -1673,13 +1675,16 @@ ATF_TC_BODY(aio_writev_efault, tc)

					fd = aio_md_setup();

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

					ATF_REQUIRE(unmapped != MAP_FAILED);

					seed = random();

					buflen = 4096;

					buffer = malloc(buflen);

					aio_fill_buffer(buffer, buflen, seed);

					iov[0].iov_base = buffer;

					iov[0].iov_len = buflen;

					iov[1].iov_base = (void*)-1;	/* Invalid! */

					iov[1].iov_base = (void*)unmapped;	/* Invalid! */

					iov[1].iov_len = buflen;

					bzero(&aio, sizeof(aio));

					aio.aio_fildes = fd;