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Fri, 9 May 2025 05:49:00 +0000 (UTC) Received: from blackfin.pond.sub.org (unknown [10.45.242.27]) by mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id D8FB21955F24; Fri, 9 May 2025 05:48:59 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id 4C8E521E66C9; Fri, 09 May 2025 07:48:57 +0200 (CEST) From: Markus Armbruster To: Nabih Estefan Cc: qemu-devel@nongnu.org, richard.henderson@linaro.org, pbonzini@redhat.com, armbru@redhat.com, Peter Foley Subject: Re: [PATCH 1/2] util: fix msan findings in keyval In-Reply-To: <20250508222132.748479-2-nabihestefan@google.com> (Nabih Estefan's message of "Thu, 8 May 2025 22:21:31 +0000") References: <20250508222132.748479-1-nabihestefan@google.com> <20250508222132.748479-2-nabihestefan@google.com> Date: Fri, 09 May 2025 07:48:57 +0200 Message-ID: <87cycibagm.fsf@pond.sub.org> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Scanned-By: MIMEDefang 3.0 on 10.30.177.15 Received-SPF: pass client-ip=170.10.129.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -34 X-Spam_score: -3.5 X-Spam_bar: --- X-Spam_report: (-3.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.416, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Nabih Estefan writes: > From: Peter Foley > > e.g. > I 2025-02-28 09:51:05.240071-0800 624 stream.go:47 qemu: Uninitialized value was created by an allocation of 'key_in_cur.i' in the stack frame > I 2025-02-28 09:51:05.240187-0800 624 stream.go:47 qemu: #0 0xaaaac49f489c in keyval_parse_one third_party/qemu/util/keyval.c:190:5 > > Signed-off-by: Peter Foley > Signed-off-by: Nabih Estefan > --- > util/keyval.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/util/keyval.c b/util/keyval.c > index a70629a481..f33c64079d 100644 > --- a/util/keyval.c > +++ b/util/keyval.c > @@ -187,7 +187,7 @@ static const char *keyval_parse_one(QDict *qdict, const char *params, > { > const char *key, *key_end, *val_end, *s, *end; > size_t len; > - char key_in_cur[128]; > + char key_in_cur[128] = {}; > QDict *cur; > int ret; > QObject *next; Prior review of Peter's patch concluded this must be false positive: https://lore.kernel.org/qemu-devel/14168384-ecdb-4c05-8267-ac5ef1c46fe9@redhat.com/