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crypto: qat - release instance on DH fallback allocation failure

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qat_dh_init_tfm() acquires a QAT crypto instance before allocating the
software fallback transform. If fallback allocation fails, the instance
reference is leaked and the device remains permanently in use.

Release the instance before returning the allocation error.

Fixes: 5d5bd24f41 ("crypto: qat - implement dh fallback for primes > 4K")
Signed-off-by: Ahsan Atta <ahsan.atta@intel.com>
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ahsan Atta 2026-08-26 10:39:31 +01:00 committed by Herbert Xu
parent 57818119c9
commit 307e27d3e0
1 changed files with 3 additions and 1 deletions
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4
drivers/crypto/intel/qat/qat_common/qat_asym_algs.c
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@ -535,8 +535,10 @@ static int qat_dh_init_tfm(struct crypto_kpp *tfm)
return -EINVAL;
ctx->ftfm = crypto_alloc_kpp(alg, 0, CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(ctx->ftfm))
if (IS_ERR(ctx->ftfm)) {
qat_crypto_put_instance(inst);
return PTR_ERR(ctx->ftfm);
}
crypto_kpp_set_flags(ctx->ftfm, crypto_kpp_get_flags(tfm));