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Fri, 25 Nov 2022 14:40:01 +0000 Received: from d06av24.portsmouth.uk.ibm.com (mk.ibm.com [9.149.105.60]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 2APEdvni17433316 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 25 Nov 2022 14:39:57 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D9DA442041; Fri, 25 Nov 2022 14:39:57 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 597464203F; Fri, 25 Nov 2022 14:39:57 +0000 (GMT) Received: from marcibm.ibmuc.com (unknown [9.171.30.243]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 25 Nov 2022 14:39:57 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : mime-version : content-transfer-encoding; s=pp1; bh=4KsWE9zzs0hf6f7CsWPNjjvXaflZNjZ14dxEJ23gbFY=; b=TUd9JjUTANaQlkXewVe86jDc/c72El2CG7KjUJk3g3B5jvppoHtjWEmUhzRMr6SviI4a 5uZsFpBrpxWIqhw1qX2S+y8+nTblJegqcsSP2DLhSYQ3v7GmtvQ2sCWWejZ1GQ0Jjt/E Oio3D7JoqM7VgF07SB/TivHMjthK8uNiAA/lTfUiA7NuqMPNf91bYhUXjVDcSRvKnMCm OnZjdRXQXVxyQMpos8orU5wNUvg5U0tA0fE43xR0yyDa6HE3drFHNE0n38eMWu1xF5Tq E0bdo0wzwtC/4REUpe8nNg0OskVXpDZt3G8G3HObJ8O92ECn92+QHwV4KvaDGeVjKQsy jA== From: Marc Hartmayer To: Cc: qemu-s390x , virtio-fs@redhat.com, "Dr. David Alan Gilbert" , Stefan Hajnoczi , Christian Borntraeger , Sven Schnelle , Stefan Liebler Subject: [PATCH] virtiofsd: Add `sigreturn` to the seccomp whitelist Date: Fri, 25 Nov 2022 15:39:46 +0100 Message-Id: <20221125143946.27717-1-mhartmay@linux.ibm.com> X-Mailer: git-send-email 2.38.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 8rQ_GLiTTmD75r2LgzE3wmrFjeoBEjEr X-Proofpoint-GUID: fU6BbmWOEmOJc_TpF_SJ9_uOny9zZrUr X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-11-25_06,2022-11-25_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 mlxlogscore=999 impostorscore=0 spamscore=0 lowpriorityscore=0 adultscore=0 malwarescore=0 bulkscore=0 clxscore=1011 mlxscore=0 phishscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2210170000 definitions=main-2211250114 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=148.163.156.1; envelope-from=mhartmay@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H2=-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 @ibm.com) X-ZM-MESSAGEID: 1669387265070100001 Content-Type: text/plain; charset="utf-8" The virtiofsd currently crashes on s390x. This is because of a `sigreturn` system call. See audit log below: type=3DSECCOMP msg=3Daudit(1669382477.611:459): auid=3D4294967295 uid=3D0 g= id=3D0 ses=3D4294967295 subj=3Dsystem_u:system_r:virtd_t:s0-s0:c0.c1023 pid= =3D6649 comm=3D"virtiofsd" exe=3D"/usr/libexec/virtiofsd" sig=3D31 arch=3D8= 0000016 syscall=3D119 compat=3D0 ip=3D0x3fff15f748a code=3D0x80000000AUID= =3D"unset" UID=3D"root" GID=3D"root" ARCH=3Ds390x SYSCALL=3Dsigreturn Signed-off-by: Marc Hartmayer Reviewed-by: German Maglione --- tools/virtiofsd/passthrough_seccomp.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/virtiofsd/passthrough_seccomp.c b/tools/virtiofsd/passth= rough_seccomp.c index 888295c073de..0033dab4939e 100644 --- a/tools/virtiofsd/passthrough_seccomp.c +++ b/tools/virtiofsd/passthrough_seccomp.c @@ -110,6 +110,7 @@ static const int syscall_allowlist[] =3D { #endif SCMP_SYS(set_robust_list), SCMP_SYS(setxattr), + SCMP_SYS(sigreturn), SCMP_SYS(symlinkat), SCMP_SYS(syncfs), SCMP_SYS(time), /* Rarely needed, except on static builds */ --=20 2.34.1