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Sat, 16 Sep 2023 15:52:10 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1694872335; 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; bh=PSLOsgEUqRpjTujQXFcsj5rZc2BLHxE2J32IiRjwSSg=; b=MaAKKj6Ogy/LvngY2xvaWqPj2ex2DWNi8WD1LyetwFkJMtRFSLHJEEFyQEZGNvnkk9haO2 XGGICboHGSVdF8PR9T4EHtmBs8hbBNWrd5ZtcKLfZhrq3APunLBu+GIXppVUB9V5P7b+9d vQStHGm/ItbvpE5HJkHJPNq9CdckRD0= X-MC-Unique: DS4gxDwQPZ6ygPO4xTV_-w-1 Date: Sat, 16 Sep 2023 15:52:10 +0200 (CEST) From: Mikulas Patocka To: Richard Henderson , Helge Deller , John David Anglin cc: qemu-devel@nongnu.org, linux-parisc@vger.kernel.org Subject: [PATCH] target/hppa: lock both words of function descriptor Message-ID: <87bd9251-5d6a-11f5-9a28-78224a776742@redhat.com> 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; 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charset="utf-8" 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 | 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; =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;