test_overflow: Regularize test reporting output

Report test run summaries more regularly, so it's easier to understand
the output:
- Remove noisy "ok" reports for shift and allocator tests.
- Reorganize per-type output to the end of each type's tests.
- Replace redundant vmalloc tests with __vmalloc so that __GFP_NO_WARN
  can be used to keep the expected failure warnings out of dmesg,
  similar to commit 8e060c21ae ("lib/test_overflow.c: avoid tainting
  the kernel and fix wrap size")

Resulting output:

  test_overflow: 18 u8 arithmetic tests finished
  test_overflow: 19 s8 arithmetic tests finished
  test_overflow: 17 u16 arithmetic tests finished
  test_overflow: 17 s16 arithmetic tests finished
  test_overflow: 17 u32 arithmetic tests finished
  test_overflow: 17 s32 arithmetic tests finished
  test_overflow: 17 u64 arithmetic tests finished
  test_overflow: 21 s64 arithmetic tests finished
  test_overflow: 113 shift tests finished
  test_overflow: 17 overflow size helper tests finished
  test_overflow: 11 allocation overflow tests finished
  test_overflow: all tests passed

Acked-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Link: https://lore.kernel.org/all/eb6d02ae-e2ed-e7bd-c700-8a6d004d84ce@rasmusvillemoes.dk/
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Link: https://lore.kernel.org/all/CAKwvOdnYYa+72VhtJ4ug=SJVFn7w+n7Th+hKYE87BRDt4hvqOg@mail.gmail.com/
Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Kees Cook 2021-09-20 10:27:16 -07:00
parent dfd42facf1
commit 8e7c8ca6b9
1 changed files with 30 additions and 24 deletions

View File

@ -252,10 +252,10 @@ static int __init test_ ## t ## _overflow(void) { \
int err = 0; \
unsigned i; \
\
pr_info("%-3s: %zu arithmetic tests\n", #t, \
ARRAY_SIZE(t ## _tests)); \
for (i = 0; i < ARRAY_SIZE(t ## _tests); ++i) \
err |= do_test_ ## t(&t ## _tests[i]); \
pr_info("%zu %s arithmetic tests finished\n", \
ARRAY_SIZE(t ## _tests), #t); \
return err; \
}
@ -291,6 +291,7 @@ static int __init test_overflow_calculation(void)
static int __init test_overflow_shift(void)
{
int err = 0;
int count = 0;
/* Args are: value, shift, type, expected result, overflow expected */
#define TEST_ONE_SHIFT(a, s, t, expect, of) ({ \
@ -313,9 +314,7 @@ static int __init test_overflow_shift(void)
pr_warn("got %llu\n", (u64)__d); \
__failed = 1; \
} \
if (!__failed) \
pr_info("ok: (%s)(%s << %s) == %s\n", #t, #a, #s, \
of ? "overflow" : #expect); \
count++; \
__failed; \
})
@ -479,6 +478,10 @@ static int __init test_overflow_shift(void)
err |= TEST_ONE_SHIFT(0, 31, s32, 0, false);
err |= TEST_ONE_SHIFT(0, 63, s64, 0, false);
pr_info("%d shift tests finished\n", count);
#undef TEST_ONE_SHIFT
return err;
}
@ -530,7 +533,6 @@ static int __init test_ ## func (void *arg) \
free ## want_arg (free_func, arg, ptr); \
return 1; \
} \
pr_info(#func " detected saturation\n"); \
return 0; \
}
@ -544,10 +546,7 @@ DEFINE_TEST_ALLOC(kmalloc, kfree, 0, 1, 0);
DEFINE_TEST_ALLOC(kmalloc_node, kfree, 0, 1, 1);
DEFINE_TEST_ALLOC(kzalloc, kfree, 0, 1, 0);
DEFINE_TEST_ALLOC(kzalloc_node, kfree, 0, 1, 1);
DEFINE_TEST_ALLOC(vmalloc, vfree, 0, 0, 0);
DEFINE_TEST_ALLOC(vmalloc_node, vfree, 0, 0, 1);
DEFINE_TEST_ALLOC(vzalloc, vfree, 0, 0, 0);
DEFINE_TEST_ALLOC(vzalloc_node, vfree, 0, 0, 1);
DEFINE_TEST_ALLOC(__vmalloc, vfree, 0, 1, 0);
DEFINE_TEST_ALLOC(kvmalloc, kvfree, 0, 1, 0);
DEFINE_TEST_ALLOC(kvmalloc_node, kvfree, 0, 1, 1);
DEFINE_TEST_ALLOC(kvzalloc, kvfree, 0, 1, 0);
@ -559,8 +558,14 @@ static int __init test_overflow_allocation(void)
{
const char device_name[] = "overflow-test";
struct device *dev;
int count = 0;
int err = 0;
#define check_allocation_overflow(alloc) ({ \
count++; \
test_ ## alloc(dev); \
})
/* Create dummy device for devm_kmalloc()-family tests. */
dev = root_device_register(device_name);
if (IS_ERR(dev)) {
@ -568,23 +573,24 @@ static int __init test_overflow_allocation(void)
return 1;
}
err |= test_kmalloc(NULL);
err |= test_kmalloc_node(NULL);
err |= test_kzalloc(NULL);
err |= test_kzalloc_node(NULL);
err |= test_kvmalloc(NULL);
err |= test_kvmalloc_node(NULL);
err |= test_kvzalloc(NULL);
err |= test_kvzalloc_node(NULL);
err |= test_vmalloc(NULL);
err |= test_vmalloc_node(NULL);
err |= test_vzalloc(NULL);
err |= test_vzalloc_node(NULL);
err |= test_devm_kmalloc(dev);
err |= test_devm_kzalloc(dev);
err |= check_allocation_overflow(kmalloc);
err |= check_allocation_overflow(kmalloc_node);
err |= check_allocation_overflow(kzalloc);
err |= check_allocation_overflow(kzalloc_node);
err |= check_allocation_overflow(__vmalloc);
err |= check_allocation_overflow(kvmalloc);
err |= check_allocation_overflow(kvmalloc_node);
err |= check_allocation_overflow(kvzalloc);
err |= check_allocation_overflow(kvzalloc_node);
err |= check_allocation_overflow(devm_kmalloc);
err |= check_allocation_overflow(devm_kzalloc);
device_unregister(dev);
pr_info("%d allocation overflow tests finished\n", count);
#undef check_allocation_overflow
return err;
}