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| author | Ard Biesheuvel <ardb@kernel.org> | 2021-03-02 21:33:03 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2021-03-13 00:04:01 +1100 |
| commit | 72e2a02cdf58fbe06533cc21f6d7dd518cf01ae5 (patch) | |
| tree | bf3cf19046019e0596e74fea0f1c073c33e4960c /crypto | |
| parent | 7d5fac8e9b6c0e95045d0ceb9140d96fb5031a48 (diff) | |
| download | linux-crypto-72e2a02cdf58fbe06533cc21f6d7dd518cf01ae5.tar.gz linux-crypto-72e2a02cdf58fbe06533cc21f6d7dd518cf01ae5.zip | |
crypto: api - check for ERR pointers in crypto_destroy_tfm()
Given that crypto_alloc_tfm() may return ERR pointers, and to avoid
crashes on obscure error paths where such pointers are presented to
crypto_destroy_tfm() (such as [0]), add an ERR_PTR check there
before dereferencing the second argument as a struct crypto_tfm
pointer.
[0] https://lore.kernel.org/linux-crypto/000000000000de949705bc59e0f6@google.com/
Reported-by: syzbot+12cf5fbfdeba210a89dd@syzkaller.appspotmail.com
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/api.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/api.c b/crypto/api.c index ed08cbd5..c4eda56c 100644 --- a/crypto/api.c +++ b/crypto/api.c @@ -562,7 +562,7 @@ void crypto_destroy_tfm(void *mem, struct crypto_tfm *tfm) { struct crypto_alg *alg; - if (unlikely(!mem)) + if (IS_ERR_OR_NULL(mem)) return; alg = tfm->__crt_alg; |