diff options
author | Stephan Müller <smueller@chronox.de> | 2020-06-07 15:20:26 +0200 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-22 14:11:18 +0200 |
commit | acbba60c5da46c9d6a91796f3d110f59cfa66ebc (patch) | |
tree | 4ce21e60e04c03ed6428ea8a58782e8bfb9dc940 /crypto/drbg.c | |
parent | 02abe6e5d230fef37e757714cac6cefa7dbcb22b (diff) | |
download | linux-crypto-acbba60c5da46c9d6a91796f3d110f59cfa66ebc.tar.gz linux-crypto-acbba60c5da46c9d6a91796f3d110f59cfa66ebc.zip |
crypto: drbg - always try to free Jitter RNG instance
commit f4d7cabd9661612f3019866664addbc463854102 upstream.
The Jitter RNG is unconditionally allocated as a seed source follwoing
the patch ffb82d3279a8. Thus, the instance must always be deallocated.
Reported-by: syzbot+2e635807decef724a1fa@syzkaller.appspotmail.com
Fixes: ffb82d3279a8 ("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>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to '')
-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 28871b08..b2b256a1 100644 --- a/crypto/drbg.c +++ b/crypto/drbg.c @@ -1647,10 +1647,12 @@ static int drbg_uninstantiate(struct drbg_state *drbg) if (drbg->random_ready.notifier_call) { unregister_random_ready_notifier(&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); |