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Add various tests to ensure that invalid arguments passed to mmap()

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trigger failures.

Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D3269
This commit is contained in:
John Baldwin 2015-08-06 16:14:29 +00:00
parent 95eee0d40b
commit 7f43ee0fb7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=286370
1 changed files with 72 additions and 0 deletions
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72
tests/sys/vm/mmap_test.c
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@ -32,6 +32,10 @@
#include <atf-c.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
static const struct {
void *addr;
@ -83,10 +87,78 @@ ATF_TC_BODY(mmap__map_at_zero, tc)
}
}
static void
checked_mmap(int prot, int flags, int fd, int error, const char *msg)
{
void *p;
p = mmap(NULL, getpagesize(), prot, flags, fd, 0);
if (p == MAP_FAILED) {
if (error == 0)
ATF_CHECK_MSG(0, "%s failed with errno %d", msg,
errno);
else
ATF_CHECK_EQ_MSG(error, errno,
"%s failed with wrong errno %d (expected %d)", msg,
errno, error);
} else {
ATF_CHECK_MSG(error == 0, "%s succeeded", msg);
munmap(p, getpagesize());
}
}
ATF_TC_WITHOUT_HEAD(mmap__bad_arguments);
ATF_TC_BODY(mmap__bad_arguments, tc)
{
int fd;
ATF_REQUIRE((fd = shm_open(SHM_ANON, O_RDWR, 0644)) >= 0);
ATF_REQUIRE(ftruncate(fd, getpagesize()) == 0);
/* These should work. */
checked_mmap(PROT_READ | PROT_WRITE, MAP_ANON, -1, 0,
"simple MAP_ANON");
checked_mmap(PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0,
"simple shm fd shared");
checked_mmap(PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0,
"simple shm fd private");
/* Extra PROT flags. */
checked_mmap(PROT_READ | PROT_WRITE | 0x100000, MAP_ANON, -1, EINVAL,
"MAP_ANON with extra PROT flags");
checked_mmap(0xffff, MAP_SHARED, fd, EINVAL,
"shm fd with garbage PROT");
/* Undefined flag. */
checked_mmap(PROT_READ | PROT_WRITE, MAP_ANON | MAP_RESERVED0080, -1,
EINVAL, "Undefined flag");
/* Both MAP_SHARED and MAP_PRIVATE */
checked_mmap(PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE |
MAP_SHARED, -1, EINVAL, "MAP_ANON with both SHARED and PRIVATE");
checked_mmap(PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_SHARED, fd,
EINVAL, "shm fd with both SHARED and PRIVATE");
/* At least one of MAP_SHARED or MAP_PRIVATE without ANON */
checked_mmap(PROT_READ | PROT_WRITE, 0, fd, EINVAL,
"shm fd without sharing flag");
/* MAP_ANON with either sharing flag (impacts fork). */
checked_mmap(PROT_READ | PROT_WRITE, MAP_ANON | MAP_SHARED, -1, 0,
"shared MAP_ANON");
checked_mmap(PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0,
"private MAP_ANON");
/* MAP_ANON should require an fd of -1. */
checked_mmap(PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, 0, EINVAL,
"MAP_ANON with fd != -1");
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, mmap__map_at_zero);
ATF_TP_ADD_TC(tp, mmap__bad_arguments);
return (atf_no_error());
}