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tests: check decoding of bpf corner cases

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* tests/bpf.c (bogus_bpf): New function.
(BOGUS_BPF): New macro.
(main): Use them.
* tests/bpf.test: Add -a option.
This commit is contained in:
Дмитрий Левин 2017-01-31 19:38:45 +00:00
parent ad4277214e
commit bf4e76e4e7
2 changed files with 38 additions and 1 deletions
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37
tests/bpf.c
View File

@ -123,35 +123,65 @@ prog_cgroup(int cmd)
}
# endif
static unsigned long efault;
static void
bogus_bpf(int cmd, const char *name)
{
const unsigned long bogus_size = 1024;
const unsigned long bogus_addr = efault - bogus_size;
sys_bpf(cmd, efault, 4);
printf("bpf(%s, %#lx, %lu) = %s\n",
name, efault, 4UL, errstr);
sys_bpf(cmd, efault, bogus_size);
printf("bpf(%s, %#lx, %lu) = %s\n",
name, efault, bogus_size, errstr);
sys_bpf(cmd, bogus_addr, 0);
printf("bpf(%s, %#lx, %lu) = %s\n",
name, bogus_addr, 0UL, errstr);
}
#define BOGUS_BPF(cmd) bogus_bpf(cmd, #cmd)
int
main(void)
{
efault = (unsigned long) tail_alloc(1) + 1;
map_create();
printf("bpf(BPF_MAP_CREATE"
", {map_type=BPF_MAP_TYPE_UNSPEC, key_size=4"
", value_size=8, max_entries=256}, %u) = %s\n",
(unsigned) sizeof(union bpf_attr), errstr);
BOGUS_BPF(BPF_MAP_CREATE);
map_any(BPF_MAP_LOOKUP_ELEM);
printf("bpf(BPF_MAP_LOOKUP_ELEM"
", {map_fd=-1, key=0xdeadbeef}, %u) = %s\n",
(unsigned) sizeof(union bpf_attr), errstr);
BOGUS_BPF(BPF_MAP_LOOKUP_ELEM);
map_any(BPF_MAP_UPDATE_ELEM);
printf("bpf(BPF_MAP_UPDATE_ELEM"
", {map_fd=-1, key=0xdeadbeef"
", value=0xbadc0ded, flags=BPF_ANY}, %u) = %s\n",
(unsigned) sizeof(union bpf_attr), errstr);
BOGUS_BPF(BPF_MAP_UPDATE_ELEM);
map_any(BPF_MAP_DELETE_ELEM);
printf("bpf(BPF_MAP_DELETE_ELEM"
", {map_fd=-1, key=0xdeadbeef}, %u) = %s\n",
(unsigned) sizeof(union bpf_attr), errstr);
BOGUS_BPF(BPF_MAP_DELETE_ELEM);
map_any(BPF_MAP_GET_NEXT_KEY);
printf("bpf(BPF_MAP_GET_NEXT_KEY"
", {map_fd=-1, key=0xdeadbeef}, %u) = %s\n",
(unsigned) sizeof(union bpf_attr), errstr);
BOGUS_BPF(BPF_MAP_GET_NEXT_KEY);
prog_load();
printf("bpf(BPF_PROG_LOAD"
@ -159,17 +189,20 @@ main(void)
", license=\"GPL\", log_level=42, log_size=4096, log_buf=%p"
", kern_version=0}, %u) = %s\n",
insns, log_buf, (unsigned) sizeof(union bpf_attr), errstr);
BOGUS_BPF(BPF_PROG_LOAD);
# ifdef HAVE_UNION_BPF_ATTR_BPF_FD
obj_manage(BPF_OBJ_PIN);
printf("bpf(BPF_OBJ_PIN"
", {pathname=\"/sys/fs/bpf/foo/bar\", bpf_fd=-1}, %u) = %s\n",
(unsigned) sizeof(union bpf_attr), errstr);
BOGUS_BPF(BPF_OBJ_PIN);
obj_manage(BPF_OBJ_GET);
printf("bpf(BPF_OBJ_GET"
", {pathname=\"/sys/fs/bpf/foo/bar\", bpf_fd=-1}, %u) = %s\n",
(unsigned) sizeof(union bpf_attr), errstr);
BOGUS_BPF(BPF_OBJ_GET);
# endif
# ifdef HAVE_UNION_BPF_ATTR_ATTACH_TYPE
@ -178,14 +211,18 @@ main(void)
", {target_fd=-1, attach_bpf_fd=-1"
", attach_type=BPF_CGROUP_INET_INGRESS}, %u) = %s\n",
(unsigned) sizeof(union bpf_attr), errstr);
BOGUS_BPF(BPF_PROG_ATTACH);
prog_cgroup(BPF_PROG_DETACH)
printf("bpf(BPF_PROG_DETACH"
", {target_fd=-1, attach_type=BPF_CGROUP_INET_INGRESS}, %u)"
" = %s\n",
(unsigned) sizeof(union bpf_attr), errstr);
BOGUS_BPF(BPF_PROG_DETACH);
# endif
bogus_bpf(0xfacefeed, "0xfacefeed /* BPF_??? */");
puts("+++ exited with 0 +++");
return 0;
}

2
tests/bpf.test
View File

@ -3,4 +3,4 @@
# Check bpf syscall decoding.
. "${srcdir=.}/init.sh"
run_strace_match_diff
run_strace_match_diff -a20