From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f71.google.com (mail-ot1-f71.google.com [209.85.210.71]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B1F0D286D4D for ; Tue, 15 Sep 2026 10:05:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789466706; cv=none; b=ku55UgyqDLAC8nJcezOatzaRtQsE7ycPZhjdbQfqd35NIe+RDkai60KfXhTUEcwi8XsuWdpGbZZFUk6NttP1/iziegzM6BFwrgo6LoYs+5Gf5BKMgiR/+sa8iT9OuAKdBJxl0He8w2MU/MYTP1MD42YwQsIhftX23imo0zyHO2g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789466706; c=relaxed/simple; bh=F1uBDC2zP+TMfNTo9zJ5lDTprixca6JNBAvDUFVoeJY=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=fvKoDJr+gENaQZ2N1+5k0wXBRKZliO8AoMSNlpZ0dC2x+xCdbgQyGcREBIUcLMoCLkUZLHYa/yN7BOMVi5yGt5elSz6T+xkpheEsIWofhiwORv2ia+XrEfQILny34+AYRSCexhlxxzFGFjYd+F4idNQiIWiO6c1fdD2NfUTJ8zc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.210.71 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-ot1-f71.google.com with SMTP id 46e09a7af769-8009280834fso5075464a34.2 for ; Tue, 15 Sep 2026 03:05:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1789466703; x=1790071503; h=content-transfer-encoding:content-type:to:from:subject:message-id :in-reply-to:date:mime-version:x-gm-message-state:from:to:cc:subject :date:message-id:reply-to:content-type; bh=TDWZiVtv7YyTWGYJEVCzf5IxcBhuXFNL5sYwfB3CfkE=; b=KXAg1WJev9Btftdhxpa07jAWwSabdNHB/woaRCUuXQU48wa16zk87yINInGOSqGWYV Yv1Yhajb7y7BgwfzLnLprVFd39DSpaQ4GlqLNioJ3NIiyh5jQEKgDn0bjwPlhros+1k2 kPeBzj9/MfheWbH7dEX4/fIt/lxDAcqJ9yImJ1HSQKd9LjlAen8V09jRLovmGLvf1CIM kdZ+IPO4LiGidLsuWCP1GX5DnxYAHU46uXx1bCk/2L1QDT8hYmxpKRgyAFmLP7KnkRdD JCkhyh3HYkb3zFwv3U6OQvyMZYOu/OcjR2hrLrBrfR5jHY625p/QDlufsGhOCAABaNuT GN1Q== X-Forwarded-Encrypted: i=1; AKwUvBwg0EBcJsRTRoXNHQYpKrHUmiocY/Ze+UJ1q4/YVG+SLSQkJnsBBED1UKMiLyeEY6poW0ir6wKV5SCdTYU=@vger.kernel.org X-Gm-Message-State: AFuF++kRIY5nUdKpGGOyuefdi+sDwmefP5v7k3KFuykv6NhkPBfo1hdt K6J22TKEU0fBJmrGyChiPVKShDs079HuvCVJiFtcSwoI6+CFTps8iJi3NaAVC0yHzCsFEtep45w rQy3AI2oFzZs6R1vIp2Q+uKUIn9M27W6/+PKXhBqVED95f0d2xChmG8QXUtA= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:807:b0:6b1:705d:b29e with SMTP id 006d021491bc7-6c541a43c51mr5954327eaf.26.1789466703469; Tue, 15 Sep 2026 03:05:03 -0700 (PDT) Date: Tue, 15 Sep 2026 03:05:03 -0700 In-Reply-To: <6aa8a19d.1a29d466.b1607.109dSMTPIN_ADDED_BROKEN@gmr-mx.google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6aa9184f.4c28b7d0.c1bba.0034.GAE@google.com> Subject: Re: [syzbot] [kvm?] INFO: task hung in kvm_gmem_release (2) From: syzbot To: jchuang26@m.fudan.edu.cn, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hello, syzbot tried to test the proposed patch but the build/boot failed: SYZFAIL: failed to recv rpc SYZFAIL: failed to recv rpc fd=3D3 want=3D4 recv=3D0 n=3D0 (errno 9: Bad file descriptor) execution of simple program fails: NOTFAIL: arptable checkpoint: getsockopt= (ARPT_SO_GET_ENTRIES) failed. table=3Dfilter (errno 22: Invalid argument). Warning: Permanently added '10.128.1.180' (ED25519) to the list of known ho= sts. 2026/09/15 10:03:47 parsed 1 programs 2026/09/15 10:03:47 serving rpc on tcp://35899 [ 92.298308][ T10] cfg80211: failed to load regulatory.db [ 94.705243][ T5628] cgroup: Unknown subsys name 'net' [ 94.819768][ T5628] cgroup: Unknown subsys name 'cpuset' [ 94.823833][ T5628] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size =3D 127995904 bytes [ 96.633598][ T5628] Adding 124996k swap on ./swap-file. Priority:0 exte= nts:1 across:124996k=20 [ 99.775137][ T5645] soft_limit_in_bytes is deprecated and will be remove= d. Writing any value to this file has no effect. Please report your usecase= to linux-mm@kvack.org if you depend on this functionality. [ 99.798351][ T5645] ebtables: xtables 32bit compat interface no longer s= upported in namespaces and will be removed soon. [ 99.815191][ T5645] arp_tables: xtables 32bit compat interface no longer= supported in namespaces and will be removed soon. [ 100.401545][ T1175] wlan0: Created IBSS using preconfigured BSSID 50:50:= 50:50:50:50 [ 100.401572][ T1175] wlan0: Creating new IBSS network, BSSID 50:50:50:50:= 50:50 [ 100.456794][ T50] wlan1: Created IBSS using preconfigured BSSID 50:50:= 50:50:50:50 [ 100.456818][ T50] wlan1: Creating new IBSS network, BSSID 50:50:50:50:= 50:50 [ 101.850164][ T5670] ip_tables: xtables 32bit compat interface no longer = supported in namespaces and will be removed soon. [ 101.850560][ T5670] ip6_tables: xtables 32bit compat interface no longer= supported in namespaces and will be removed soon. [ 102.501627][ T5676] bridge0: port 1(bridge_slave_0) entered blocking sta= te [ 102.502376][ T5676] bridge0: port 1(bridge_slave_0) entered disabled sta= te [ 102.502493][ T5676] bridge_slave_0: entered allmulticast mode [ 102.504536][ T5676] bridge_slave_0: entered promiscuous mode [ 102.522188][ T5676] bridge0: port 2(bridge_slave_1) entered blocking sta= te [ 102.522347][ T5676] bridge0: port 2(bridge_slave_1) entered disabled sta= te [ 102.522511][ T5676] bridge_slave_1: entered allmulticast mode [ 102.533089][ T5676] bridge_slave_1: entered promiscuous mode [ 102.590213][ T5676] bond0: (slave bond_slave_0): Enslaving as an active = interface with an up link [ 102.592992][ T5676] bond0: (slave bond_slave_1): Enslaving as an active = interface with an up link [ 102.632923][ T5676] team0: Port device team_slave_0 added [ 102.636138][ T5676] team0: Port device team_slave_1 added [ 102.669819][ T5676] batman_adv: batadv0: Adding interface: batadv_slave_= 0 [ 102.669834][ T5676] batman_adv: batadv0: The MTU of interface batadv_sla= ve_0 is too small (1500) to handle the transport of batman-adv packets. Pac= kets going over this interface will be fragmented on layer2 which could imp= act the performance. Setting the MTU to 1532 would solve the problem. [ 102.669858][ T5676] batman_adv: batadv0: Not using interface batadv_slav= e_0 (retrying later): interface not active [ 102.672214][ T5676] batman_adv: batadv0: Adding interface: batadv_slave_= 1 [ 102.672229][ T5676] batman_adv: batadv0: The MTU of interface batadv_sla= ve_1 is too small (1500) to handle the transport of batman-adv packets. Pac= kets going over this interface will be fragmented on layer2 which could imp= act the performance. Setting the MTU to 1532 would solve the problem. [ 102.672260][ T5676] batman_adv: batadv0: Not using interface batadv_slav= e_1 (retrying later): interface not active [ 102.791250][ T5676] hsr_slave_0: entered promiscuous mode [ 102.792721][ T5676] hsr_slave_1: entered promiscuous mode [ 102.977390][ T5676] netdevsim netdevsim6 netdevsim0: renamed from eth0 [ 102.984696][ T5676] 8021q: adding VLAN 0 to HW filter on device netdevsi= m0 [ 102.996682][ T5676] netdevsim netdevsim6 netdevsim1: renamed from eth1 [ 103.011000][ T5676] 8021q: adding VLAN 0 to HW filter on device netdevsi= m1 [ 103.012159][ T5676] netdevsim netdevsim6 netdevsim2: renamed from eth2 [ 103.032735][ T5676] 8021q: adding VLAN 0 to HW filter on device netdevsi= m2 [ 103.033682][ T5676] netdevsim netdevsim6 netdevsim3: renamed from eth3 [ 103.051624][ T5676] 8021q: adding VLAN 0 to HW filter on device netdevsi= m3 [ 103.089001][ T5676] bridge0: port 2(bridge_slave_1) entered blocking sta= te [ 103.089112][ T5676] bridge0: port 2(bridge_slave_1) entered forwarding s= tate [ 103.089670][ T5676] bridge0: port 1(bridge_slave_0) entered blocking sta= te [ 103.089758][ T5676] bridge0: port 1(bridge_slave_0) entered forwarding s= tate [ 103.183781][ T5676] 8021q: adding VLAN 0 to HW filter on device bond0 [ 103.206356][ T1175] bridge0: port 1(bridge_slave_0) entered disabled sta= te [ 103.208344][ T1175] bridge0: port 2(bridge_slave_1) entered disabled sta= te [ 103.236601][ T5676] 8021q: adding VLAN 0 to HW filter on device team0 [ 103.245025][ T1037] bridge0: port 1(bridge_slave_0) entered blocking sta= te [ 103.245127][ T1037] bridge0: port 1(bridge_slave_0) entered forwarding s= tate [ 103.275267][ T1175] bridge0: port 2(bridge_slave_1) entered blocking sta= te [ 103.276466][ T1175] bridge0: port 2(bridge_slave_1) entered forwarding s= tate [ 103.682714][ T5676] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 103.944689][ T5676] veth0_vlan: entered promiscuous mode [ 103.963472][ T5676] veth1_vlan: entered promiscuous mode [ 104.009708][ T5676] veth0_macvtap: entered promiscuous mode [ 104.016196][ T5676] veth1_macvtap: entered promiscuous mode [ 104.051538][ T5676] batman_adv: batadv0: Interface activated: batadv_sla= ve_0 [ 104.073599][ T5676] batman_adv: batadv0: Interface activated: batadv_sla= ve_1 [ 104.163515][ T1175] netdevsim netdevsim6 netdevsim3: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 104.163925][ T1175] netdevsim netdevsim6 netdevsim2: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 104.163961][ T1175] netdevsim netdevsim6 netdevsim1: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 104.164004][ T1175] netdevsim netdevsim6 netdevsim0: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 104.338037][ T13] netdevsim netdevsim6 netdevsim3 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 [ 104.481043][ T13] netdevsim netdevsim6 netdevsim2 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 [ 104.541977][ T13] netdevsim netdevsim6 netdevsim1 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 [ 104.620294][ T13] netdevsim netdevsim6 netdevsim0 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 [ 105.627300][ T52] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > = 1 [ 105.627982][ T52] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > = 9 [ 105.628534][ T52] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > = 9 [ 105.629728][ T52] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > = 4 [ 105.630376][ T52] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > = 2 [ 105.917265][ T13] bridge_slave_1: left allmulticast mode [ 105.917315][ T13] bridge_slave_1: left promiscuous mode [ 105.918225][ T13] bridge0: port 2(bridge_slave_1) entered disabled sta= te [ 105.951678][ T13] bridge_slave_0: left allmulticast mode [ 105.951709][ T13] bridge_slave_0: left promiscuous mode [ 105.953700][ T13] bridge0: port 1(bridge_slave_0) entered disabled sta= te [ 106.194217][ T13] bond0 (unregistering): (slave bond_slave_0): Releasi= ng backup interface [ 106.218127][ T13] bond0 (unregistering): (slave bond_slave_1): Releasi= ng backup interface [ 106.219936][ T13] bond0 (unregistering): Released all slaves [ 106.358701][ T13] hsr_slave_0: left promiscuous mode [ 106.359698][ T13] hsr_slave_1: left promiscuous mode [ 106.361694][ T13] batman_adv: batadv0: Interface deactivated: batadv_s= lave_0 [ 106.361805][ T13] batman_adv: batadv0: Removing interface: batadv_slav= e_0 [ 106.364165][ T13] batman_adv: batadv0: Interface deactivated: batadv_s= lave_1 [ 106.364186][ T13] batman_adv: batadv0: Removing interface: batadv_slav= e_1 [ 106.428453][ T13] veth1_macvtap: left promiscuous mode [ 106.428514][ T13] veth0_macvtap: left promiscuous mode [ 106.428623][ T13] veth1_vlan: left promiscuous mode [ 106.428718][ T13] veth0_vlan: left promiscuous mode [ 106.729824][ T13] team0 (unregistering): Port device team_slave_1 remo= ved [ 106.749999][ T13] team0 (unregistering): Port device team_slave_0 remo= ved [ 106.863908][ T5281] 8021q: adding VLAN 0 to HW filter on device eth1 SYZFAIL: failed to recv rpc fd=3D3 want=3D4 recv=3D0 n=3D0 (errno 9: Bad file descriptor) execution of simple program fails: NOTFAIL: arptable checkpoint: getsockopt= (ARPT_SO_GET_ENTRIES) failed. table=3Dfilter (errno 22: Invalid argument). [ 107.874113][ T5281] 8021q: adding VLAN 0 to HW filter on device eth2 [ 108.744031][ T5281] 8021q: adding VLAN 0 to HW filter on device eth3 [ 109.188685][ T5281] 8021q: adding VLAN 0 to HW filter on device eth4 syzkaller build log: go env (err=3D) AR=3D'ar' CC=3D'gcc' CGO_CFLAGS=3D'-O2 -g' CGO_CPPFLAGS=3D'' CGO_CXXFLAGS=3D'-O2 -g' CGO_ENABLED=3D'1' CGO_FFLAGS=3D'-O2 -g' CGO_LDFLAGS=3D'-O2 -g' CXX=3D'g++' GCCGO=3D'gccgo' GO111MODULE=3D'auto' GOAMD64=3D'v1' GOARCH=3D'amd64' GOAUTH=3D'netrc' GOBIN=3D'' GOCACHE=3D'/syzkaller/.cache/go-build' GOCACHEPROG=3D'' GODEBUG=3D'' GOENV=3D'/syzkaller/.config/go/env' GOEXE=3D'' GOEXPERIMENT=3D'' GOFIPS140=3D'off' GOFLAGS=3D'' GOGCCFLAGS=3D'-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=3D0= -ffile-prefix-map=3D/tmp/go-build40483423=3D/tmp/go-build -gno-record-gcc-= switches' GOHOSTARCH=3D'amd64' GOHOSTOS=3D'linux' GOINSECURE=3D'' GOMOD=3D'/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.= mod' GOMODCACHE=3D'/syzkaller/jobs-2/linux/gopath/pkg/mod' GONOPROXY=3D'' GONOSUMDB=3D'' GOOS=3D'linux' GOPATH=3D'/syzkaller/jobs-2/linux/gopath' GOPRIVATE=3D'' GOPROXY=3D'https://proxy.golang.org,direct' GOROOT=3D'/usr/local/go' GOSUMDB=3D'sum.golang.org' GOTELEMETRY=3D'local' GOTELEMETRYDIR=3D'/syzkaller/.config/go/telemetry' GOTMPDIR=3D'' GOTOOLCHAIN=3D'auto' GOTOOLDIR=3D'/usr/local/go/pkg/tool/linux_amd64' GOVCS=3D'' GOVERSION=3D'go1.26.0' GOWORK=3D'' PKG_CONFIG=3D'pkg-config' git status (err=3D) HEAD detached at 1fe56c0af80 nothing to commit, working tree clean tput: No value for $TERM and no -T specified tput: No value for $TERM and no -T specified Makefile:31: run command via tools/syz-env for best compatibility, see: Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contribut= ing.md#using-syz-env go list -f '{{.Stale}}' -ldflags=3D"-s -w -X github.com/google/syzkaller/pr= og.GitRevision=3D1fe56c0af80df10ab9f07819d9fa709dc9971ae1 -X github.com/goo= gle/syzkaller/prog.gitRevisionDate=3D20260910-094642" ./sys/syz-sysgen | g= rep -q false || go install -ldflags=3D"-s -w -X github.com/google/syzkaller= /prog.GitRevision=3D1fe56c0af80df10ab9f07819d9fa709dc9971ae1 -X github.com/= google/syzkaller/prog.gitRevisionDate=3D20260910-094642" ./sys/syz-sysgen make .descriptions tput: No value for $TERM and no -T specified tput: No value for $TERM and no -T specified Makefile:31: run command via tools/syz-env for best compatibility, see: Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contribut= ing.md#using-syz-env bin/syz-sysgen touch .descriptions GOOS=3Dlinux GOARCH=3Damd64 go build -ldflags=3D"-s -w -X github.com/google= /syzkaller/prog.GitRevision=3D1fe56c0af80df10ab9f07819d9fa709dc9971ae1 -X g= ithub.com/google/syzkaller/prog.gitRevisionDate=3D20260910-094642" -o ./bi= n/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog mkdir -p ./bin/linux_386 x86_64-linux-gnu-g++ -o ./bin/linux_386/syz-executor executor/executor.cc \ -m32 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wfr= ame-larger-than=3D16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-forma= t-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -= static-pie -std=3Dc++17 -I. -Iexecutor/_include -DGOOS_linux=3D1 -DGOARCH= _386=3D1 \ -DHOSTGOOS_linux=3D1 -DGIT_REVISION=3D\"1fe56c0af80df10ab9f07819d9fa709dc9= 971ae1\" /usr/bin/ld: /tmp/cc3yk8t3.o: in function `Connection::Connect(char const*,= char const*)': executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEP= KcS1_]+0x145): warning: Using 'gethostbyname' in statically linked applicat= ions requires at runtime the shared libraries from the glibc version used f= or linking ./tools/check-syzos.sh 2>/dev/null [INFO] Unsupported architecture '386', skipping check. Tested on: commit: 58785836 Merge tag 'nfsd-7.3-1' of git://git.kernel.or.. git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=3D5e4e3a0e188a497= e dashboard link: https://syzkaller.appspot.com/bug?extid=3Dab6273c58262b9de5= 6d9 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-= 1~exp1~20260613092250.77), Debian LLD 22.1.8 userspace arch: i386 patch: https://syzkaller.appspot.com/x/patch.diff?x=3D155f21155800= 00