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| author | Eric Biggers <ebiggers@google.com> | 2019-03-31 13:09:14 -0700 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-04-08 14:42:55 +0800 |
| commit | eda69b0c06bc615f4b055d560ed19001619e611a (patch) | |
| tree | 51f0004dac37be337d0bf12a43b7f7b35663d94d /crypto/testmgr.c | |
| parent | f6e9af87661530e60d9faf1d96675e8f22127aa8 (diff) | |
| download | lwn-eda69b0c06bc615f4b055d560ed19001619e611a.tar.gz lwn-eda69b0c06bc615f4b055d560ed19001619e611a.zip | |
crypto: testmgr - add panic_on_fail module parameter
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>
Diffstat (limited to 'crypto/testmgr.c')
| -rw-r--r-- | crypto/testmgr.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/crypto/testmgr.c b/crypto/testmgr.c index 2c2ddebb48d3..0f6bfb6ce6a4 100644 --- a/crypto/testmgr.c +++ b/crypto/testmgr.c @@ -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); |