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crypto: testmgr - add panic_on_fail module parameter

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Add a module parameter cryptomgr.panic_on_fail which causes the kernel
to panic if any crypto self-tests fail.

Use cases:

- More easily detect crypto self-test failures by boot testing,
  e.g. on KernelCI.
- Get a bug report if syzkaller manages to use the template system to
  instantiate an algorithm that fails its self-tests.

The command-line option "fips=1" already does this, but it also makes
other changes not wanted for general testing, such as disabling
"unapproved" algorithms.  panic_on_fail just does what it says.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers 2019-03-31 13:09:14 -07:00 committed by Herbert Xu
parent f6e9af8766
commit eda69b0c06
1 changed files with 6 additions and 2 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

8
crypto/testmgr.c
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@ -45,6 +45,9 @@ static bool notests;
module_param(notests, bool, 0644);
MODULE_PARM_DESC(notests, "disable crypto self-tests");
static bool panic_on_fail;
module_param(panic_on_fail, bool, 0444);
#ifdef CONFIG_CRYPTO_MANAGER_EXTRA_TESTS
static bool noextratests;
module_param(noextratests, bool, 0644);
@ -4109,8 +4112,9 @@ int alg_test(const char *driver, const char *alg, u32 type, u32 mask)
type, mask);
test_done:
if (fips_enabled && rc)
panic("%s: %s alg self test failed in fips mode!\n", driver, alg);
if (rc && (fips_enabled || panic_on_fail))
panic("alg: self-tests for %s (%s) failed in %s mode!\n",
driver, alg, fips_enabled ? "fips" : "panic_on_fail");
if (fips_enabled && !rc)
pr_info("alg: self-tests for %s (%s) passed\n", driver, alg);