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tests: check corner cases of udev_monitor_netlink_header decoding

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* tests/netlink_kobject_uevent.c (test_nlmsg_type_kernel): Create
a tail-allocated udev_monitor_netlink_header object and pass it
to sys_send.
(test_nlmsg_type_udev): Likewise.  Check decoding of
udev_monitor_netlink_header object that ends in unmapped memory region.
This commit is contained in:
Дмитрий Левин 2018-04-11 15:41:40 +00:00
parent 968a545ab7
commit c78af2c9cf
1 changed files with 29 additions and 14 deletions
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43
tests/netlink_kobject_uevent.c
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@ -47,7 +47,7 @@ sys_send(const int fd, const void *const buf, const size_t len)
static void
test_nlmsg_type_udev(const int fd)
{
unsigned int offset = 8;
static const char extra[] = "12345678";
struct udev_monitor_netlink_header uh = {
.prefix = "libudev",
.magic = htonl(0xfeedcafe),
@ -59,12 +59,13 @@ test_nlmsg_type_udev(const int fd)
.filter_tag_bloom_hi = htonl(0x2000400),
.filter_tag_bloom_lo = htonl(0x10800000),
};
unsigned int len = sizeof(uh);
char buf[len + offset];
memcpy(buf, &uh, len);
memcpy(buf + len, "12345678", offset);
const unsigned int extra_len = LENGTH_OF(extra);
const unsigned int uh_len = sizeof(uh);
sys_send(fd, &uh, len);
char *const buf = tail_alloc(uh_len + extra_len);
memcpy(buf + extra_len, &uh, uh_len);
sys_send(fd, buf + extra_len, uh_len);
printf("sendto(%d, {{prefix=\"%s\", magic=htonl(%#x)"
", header_size=%u, properties_off=%u, properties_len=%u"
", filter_subsystem_hash=htonl(%#x)"
@ -76,9 +77,11 @@ test_nlmsg_type_udev(const int fd)
ntohl(uh.magic), uh.header_size, uh.properties_off,
uh.properties_len, ntohl(uh.filter_subsystem_hash),
ntohl(uh.filter_devtype_hash), ntohl(uh.filter_tag_bloom_hi),
ntohl(uh.filter_tag_bloom_lo), len, errstr);
ntohl(uh.filter_tag_bloom_lo), uh_len, errstr);
sys_send(fd, &buf, len + offset);
memcpy(buf, &uh, uh_len);
memcpy(buf + uh_len, extra, extra_len);
sys_send(fd, buf, uh_len + extra_len);
printf("sendto(%d, {{prefix=\"%s\", magic=htonl(%#x)"
", header_size=%u, properties_off=%u, properties_len=%u"
", filter_subsystem_hash=htonl(%#x)"
@ -90,10 +93,17 @@ test_nlmsg_type_udev(const int fd)
uh.properties_len, ntohl(uh.filter_subsystem_hash),
ntohl(uh.filter_devtype_hash), ntohl(uh.filter_tag_bloom_hi),
ntohl(uh.filter_tag_bloom_lo));
print_quoted_memory(buf + len, offset);
print_quoted_memory(buf + uh_len, extra_len);
printf("}, %u, MSG_DONTWAIT, NULL, 0) = %s\n",
len + offset, errstr);
uh_len + extra_len, errstr);
memcpy(buf + extra_len + 1, &uh, uh_len - 1);
sys_send(fd, buf + extra_len + 1, uh_len);
printf("sendto(%d, ", fd);
print_quoted_memory(&uh, MIN(uh_len - 1, DEFAULT_STRLEN));
printf("%s, %u, MSG_DONTWAIT, NULL, 0) = %s\n",
(uh_len - 1 > DEFAULT_STRLEN ? "..." : ""),
uh_len, errstr);
}
static void
@ -109,12 +119,17 @@ test_nlmsg_type_kernel(const int fd)
.filter_devtype_hash = htonl(0x10000000),
.filter_tag_bloom_hi = htonl(0x2000400),
};
const unsigned int uh_len = sizeof(uh);
sys_send(fd, &uh, sizeof(uh));
TAIL_ALLOC_OBJECT_CONST_PTR(struct udev_monitor_netlink_header, p);
memcpy(p, &uh, uh_len);
sys_send(fd, p, uh_len);
printf("sendto(%d, ", fd);
print_quoted_memory(&uh, DEFAULT_STRLEN);
printf("..., %u, MSG_DONTWAIT, NULL, 0) = %s\n",
(unsigned) sizeof(uh), errstr);
print_quoted_memory(&uh, MIN(uh_len, DEFAULT_STRLEN));
printf("%s, %u, MSG_DONTWAIT, NULL, 0) = %s\n",
(uh_len > DEFAULT_STRLEN ? "..." : ""),
uh_len, errstr);
}
int