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Tsirkin" Subject: [PATCH 3/7] util: make a copy of iova_tree_remove_parameter Date: Fri, 19 Aug 2022 18:53:53 +0200 Message-Id: <20220819165357.3591965-4-eperezma@redhat.com> In-Reply-To: <20220819165357.3591965-1-eperezma@redhat.com> References: <20220819165357.3591965-1-eperezma@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=eperezma@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1660928542540100001 It's convenient to call iova_tree_remove from a map returned from iova_tree_find or iova_tree_find_iova. With the current code this is not possible, since we will free it, and then we will try to search for it again. Fix it making a copy of the argument. Not applying a fixes tag, since there is no use like that at the moment. Signed-off-by: Eugenio P=C3=A9rez --- util/iova-tree.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/util/iova-tree.c b/util/iova-tree.c index fee530a579..713e3edd7b 100644 --- a/util/iova-tree.c +++ b/util/iova-tree.c @@ -166,9 +166,11 @@ void iova_tree_foreach(IOVATree *tree, iova_tree_itera= tor iterator) =20 void iova_tree_remove(IOVATree *tree, const DMAMap *map) { + /* Just in case caller is calling iova_tree_remove from a result of fi= nd */ + const DMAMap needle =3D *map; const DMAMap *overlap; =20 - while ((overlap =3D iova_tree_find(tree, map))) { + while ((overlap =3D iova_tree_find(tree, &needle))) { g_tree_remove(tree->tree, overlap); } } --=20 2.31.1