From 95c3df5a24e2f18129b58691c2ebaf0d86808525 Mon Sep 17 00:00:00 2001 From: Eric Blake Date: Fri, 1 Apr 2016 09:57:02 -0600 Subject: crypto: Avoid memory leak on failure Commit 7836857 introduced a memory leak due to invalid use of Error vs. visit_type_end(). If visiting the intermediate members fails, we clear the error and unconditionally use visit_end_struct() on the same error object; but if that cleanup succeeds, we then skip the qapi_free call. Until a later patch adds visit_check_struct(), the only safe approach is to use two separate error objects. Signed-off-by: Eric Blake Message-id: 1459526222-30052-1-git-send-email-eblake@redhat.com Signed-off-by: Max Reitz --- block/crypto.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'block') diff --git a/block/crypto.c b/block/crypto.c index be3498581c..1903e84fbd 100644 --- a/block/crypto.c +++ b/block/crypto.c @@ -196,6 +196,7 @@ block_crypto_open_opts_init(QCryptoBlockFormat format, OptsVisitor *ov; QCryptoBlockOpenOptions *ret = NULL; Error *local_err = NULL; + Error *end_err = NULL; ret = g_new0(QCryptoBlockOpenOptions, 1); ret->format = format; @@ -218,10 +219,9 @@ block_crypto_open_opts_init(QCryptoBlockFormat format, error_setg(&local_err, "Unsupported block format %d", format); break; } - error_propagate(errp, local_err); - local_err = NULL; - visit_end_struct(opts_get_visitor(ov), &local_err); + visit_end_struct(opts_get_visitor(ov), &end_err); + error_propagate(&local_err, end_err); out: if (local_err) { @@ -242,6 +242,7 @@ block_crypto_create_opts_init(QCryptoBlockFormat format, OptsVisitor *ov; QCryptoBlockCreateOptions *ret = NULL; Error *local_err = NULL; + Error *end_err = NULL; ret = g_new0(QCryptoBlockCreateOptions, 1); ret->format = format; @@ -264,10 +265,9 @@ block_crypto_create_opts_init(QCryptoBlockFormat format, error_setg(&local_err, "Unsupported block format %d", format); break; } - error_propagate(errp, local_err); - local_err = NULL; - visit_end_struct(opts_get_visitor(ov), &local_err); + visit_end_struct(opts_get_visitor(ov), &end_err); + error_propagate(&local_err, end_err); out: if (local_err) { -- cgit v1.2.3