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Sat, 16 Sep 2023 18:32:45 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1694881970; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=xIHfhbG9vrWXCteyDogmUAAdtPlvGL+scSsfu6RPhII=; b=cGAmLNlEpAMzIGn2WlGED4Jb0JhuZDxzNlD3f3tjmYz3ePNlNyybrNgGP/7Ii5oXhCeQeB 4K0kqGB87rOBbSqfmv2PKlbJrYzo6Sy+jVfaFzxJ47UWDxOTNdpCIATPw5itKiVpfOsF07 rTcK5+AYHrGccVeLOaQYIqxqkOWl5aM= X-MC-Unique: Ch7xPuwEOPqseIIX3YoWyw-1 Date: Sat, 16 Sep 2023 18:32:45 +0200 (CEST) From: Mikulas Patocka To: Helge Deller cc: Richard Henderson , John David Anglin , qemu-devel@nongnu.org, linux-parisc@vger.kernel.org Subject: [PATCH v2] qemu-hppa: lock both words of function descriptor In-Reply-To: <953ee56d-173a-aaf2-c7fc-34386f285340@gmx.de> Message-ID: References: <87bd9251-5d6a-11f5-9a28-78224a776742@redhat.com> <953ee56d-173a-aaf2-c7fc-34386f285340@gmx.de> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.2 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=mpatocka@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, 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_H3=0.001, RCVD_IN_MSPIKE_WL=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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1694881989290100001 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" On Sat, 16 Sep 2023, Helge Deller wrote: > On 9/16/23 15:52, Mikulas Patocka wrote: > > The code in setup_rt_frame reads two words at haddr, but locks only one. > > This patch fixes it to lock both. > > > > Signed-off-by: Mikulas Patocka > > > > --- > > linux-user/hppa/signal.c | 5 ++--- > > 1 file changed, 2 insertions(+), 3 deletions(-) > > > > Index: qemu/linux-user/hppa/signal.c > > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > > --- qemu.orig/linux-user/hppa/signal.c > > +++ qemu/linux-user/hppa/signal.c > > @@ -149,12 +149,11 @@ void setup_rt_frame(int sig, struct targ > > target_ulong *fdesc, dest; > > > > haddr &=3D -4; > > - if (!lock_user_struct(VERIFY_READ, fdesc, haddr, 1)) { > > + if (!(fdesc =3D lock_user(VERIFY_READ, haddr, 2 * > > sizeof(target_ulong), 1))) > > goto give_sigsegv; > > - } >=20 > Patch is Ok, but I think the qemu coding style is to keep the { } braces,= even > if they are unnecessary (as in this case). >=20 > Acked-by: Helge Deller OK, here I resend it: From: Mikulas Patocka The code in setup_rt_frame reads two words at haddr, but locks only one. This patch fixes it to lock both. Signed-off-by: Mikulas Patocka Acked-by: Helge Deller --- linux-user/hppa/signal.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) Index: qemu/linux-user/hppa/signal.c =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D --- qemu.orig/linux-user/hppa/signal.c +++ qemu/linux-user/hppa/signal.c @@ -149,12 +149,12 @@ void setup_rt_frame(int sig, struct targ target_ulong *fdesc, dest; =20 haddr &=3D -4; - if (!lock_user_struct(VERIFY_READ, fdesc, haddr, 1)) { + if (!(fdesc =3D lock_user(VERIFY_READ, haddr, 2 * sizeof(target_ul= ong), 1))) { goto give_sigsegv; } __get_user(dest, fdesc); __get_user(env->gr[19], fdesc + 1); - unlock_user_struct(fdesc, haddr, 1); + unlock_user(fdesc, haddr, 0); haddr =3D dest; } env->iaoq_f =3D haddr;