diff options
| author | Stephan Müller <smueller@chronox.de> | 2020-06-07 15:20:26 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-06-15 17:38:54 +1000 |
| commit | 819966c06b759022e9932f328284314d9272b9f3 (patch) | |
| tree | 90ddd360f92ed37ae23f52f4bb9fb6d0f16764d9 /crypto | |
| parent | 1f5b07f5dd1748a6f9363fb1a76d599c74af8231 (diff) | |
| download | lwn-819966c06b759022e9932f328284314d9272b9f3.tar.gz lwn-819966c06b759022e9932f328284314d9272b9f3.zip | |
crypto: drbg - always try to free Jitter RNG instance
The Jitter RNG is unconditionally allocated as a seed source follwoing
the patch 97f2650e5040. Thus, the instance must always be deallocated.
Reported-by: syzbot+2e635807decef724a1fa@syzkaller.appspotmail.com
Fixes: 97f2650e5040 ("crypto: drbg - always seeded with SP800-90B ...")
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/drbg.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/crypto/drbg.c b/crypto/drbg.c index 37526eb8c5d5..8d80d93cab97 100644 --- a/crypto/drbg.c +++ b/crypto/drbg.c @@ -1631,10 +1631,12 @@ static int drbg_uninstantiate(struct drbg_state *drbg) if (drbg->random_ready.func) { del_random_ready_callback(&drbg->random_ready); cancel_work_sync(&drbg->seed_work); - crypto_free_rng(drbg->jent); - drbg->jent = NULL; } + if (!IS_ERR_OR_NULL(drbg->jent)) + crypto_free_rng(drbg->jent); + drbg->jent = NULL; + if (drbg->d_ops) drbg->d_ops->crypto_fini(drbg); drbg_dealloc_state(drbg); |