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crypto: use auto cleanup for many stack variables

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Simplify cleanup paths by using glib's auto cleanup macros for stack
variables, allowing several goto jumps / labels to be eliminated.

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrangé 2019-07-23 16:22:36 +01:00
parent 133cf1e5b1
commit 57b9f113fc
8 changed files with 65 additions and 133 deletions
Download patch file Download diff file Expand all files Collapse all files

15
crypto/block.c
View file

@ -299,15 +299,13 @@ static int do_qcrypto_block_cipher_encdec(QCryptoCipher *cipher,
QCryptoCipherEncDecFunc func,
Error **errp)
{
uint8_t *iv;
g_autofree uint8_t *iv = niv ? g_new0(uint8_t, niv) : NULL;
int ret = -1;
uint64_t startsector = offset / sectorsize;
assert(QEMU_IS_ALIGNED(offset, sectorsize));
assert(QEMU_IS_ALIGNED(len, sectorsize));
iv = niv ? g_new0(uint8_t, niv) : NULL;
while (len > 0) {
size_t nbytes;
if (niv) {
@ -320,19 +318,19 @@ static int do_qcrypto_block_cipher_encdec(QCryptoCipher *cipher,
}
if (ret < 0) {
goto cleanup;
return -1;
}
if (qcrypto_cipher_setiv(cipher,
iv, niv,
errp) < 0) {
goto cleanup;
return -1;
}
}
nbytes = len > sectorsize ? sectorsize : len;
if (func(cipher, buf, buf, nbytes, errp) < 0) {
goto cleanup;
return -1;
}
startsector++;
@ -340,10 +338,7 @@ static int do_qcrypto_block_cipher_encdec(QCryptoCipher *cipher,
len -= nbytes;
}
ret = 0;
cleanup:
g_free(iv);
return ret;
return 0;
}