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cleanup inspired by false positive F-675: AES-CTR and AES-OFB Modes Bypass WC_C_DYNAMIC_FALLBACK Selection Logic

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This commit is contained in:
Daniel Pouzzner
2026-06-09 15:07:53 -05:00
parent da1b7fe236
commit c9cc79f9ae
1 changed files with 10 additions and 26 deletions
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linuxkm/lkcapi_aes_glue.c
+10 -26
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@@ -2509,13 +2509,10 @@ static int km_AesCtrEncrypt(struct skcipher_request *req)
return err;
}
/* Copy the cipher state to mitigate races on Aes.reg and Aes.tmp. */
aes_copy = (struct Aes *)malloc(sizeof(Aes));
if (aes_copy == NULL) {
err = -ENOMEM;
err = km_AesGet(ctx, 0 /* decrypt_p */, 1 /* copy_p */, &aes_copy);
if (unlikely(err)) {
goto out;
}
XMEMCPY(aes_copy, ctx->aes_encrypt, sizeof(Aes));
err = wc_AesSetIV(aes_copy, walk.iv);
@@ -2583,16 +2580,11 @@ static int km_AesCtrDecrypt(struct skcipher_request *req)
return err;
}
/* Copy the cipher state to mitigate races on Aes.reg and Aes.tmp. */
aes_copy = (struct Aes *)malloc(sizeof(Aes));
if (aes_copy == NULL) {
err = -ENOMEM;
/* CTR uses the same schedule for encrypt and decrypt. */
err = km_AesGet(ctx, 0 /* decrypt_p */, 1 /* copy_p */, &aes_copy);
if (unlikely(err)) {
goto out;
}
XMEMCPY(aes_copy, ctx->aes_encrypt, sizeof(Aes)); /* CTR uses the same
* schedule for encrypt
* and decrypt.
*/
err = wc_AesSetIV(aes_copy, walk.iv);
@@ -2697,13 +2689,10 @@ static int km_AesOfbEncrypt(struct skcipher_request *req)
return err;
}
/* Copy the cipher state to mitigate races on Aes.reg and Aes.tmp. */
aes_copy = (struct Aes *)malloc(sizeof(Aes));
if (aes_copy == NULL) {
err = -ENOMEM;
err = km_AesGet(ctx, 0 /* decrypt_p */, 1 /* copy_p */, &aes_copy);
if (unlikely(err)) {
goto out;
}
XMEMCPY(aes_copy, ctx->aes_encrypt, sizeof(Aes));
err = wc_AesSetIV(aes_copy, walk.iv);
@@ -2771,16 +2760,11 @@ static int km_AesOfbDecrypt(struct skcipher_request *req)
return err;
}
/* Copy the cipher state to mitigate races on Aes.reg and Aes.tmp. */
aes_copy = (struct Aes *)malloc(sizeof(Aes));
if (aes_copy == NULL) {
err = -ENOMEM;
/* OFB uses the same schedule for encrypt and decrypt. */
err = km_AesGet(ctx, 0 /* decrypt_p */, 1 /* copy_p */, &aes_copy);
if (unlikely(err)) {
goto out;
}
XMEMCPY(aes_copy, ctx->aes_encrypt, sizeof(Aes)); /* OFB uses the same
* schedule for encrypt
* and decrypt.
*/
err = wc_AesSetIV(aes_copy, walk.iv);