From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f72.google.com (mail-ot1-f72.google.com [209.85.210.72]) (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 D8F4C2F1FDF for ; Fri, 18 Sep 2026 05:31:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789709464; cv=none; b=NrA9ckzPVyM7QoNZ7ZpS+dZY8Qf0yO+OyFicwEhXaxwnCLvmy2N1MOlyTdc4DqWLvfgy/Ta/e/WPyemmJTV267SGOZa7F3evpqTxSBbDhg7FletS5Zf+z/yjhgKkoysKhqlk2P0ksJ/mDwK217fRFHB4ERxtPT0WHxjHmVLSoU0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789709464; c=relaxed/simple; bh=AQGbT+57m2bWw3I9uMed8dCXXWwbmrUgORLiPtWUPmA=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=U0sC+qQcQJ1LOncbDw8YXUImcWP2PmaEULAkJ9InbBVmpL6QPwpjqIYoPDQHEvVpqIEHnoVXBeoo4NeOaT1o/3V9ik1ZFyp+JaqnBovnsomTs4KzEFo33VDnlKZbiMBKGfvhrJlpMqxQJBe5hUJ5xW34jyoYorqeNSzkD4G2Iog= 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=209.85.210.72 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-f72.google.com with SMTP id 46e09a7af769-8051cdb9338so568119a34.3 for ; Thu, 17 Sep 2026 22:31:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1789709462; x=1790314262; 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=Jx2P8eWubv34fNaz66AydUkXQRNiSOcBAcdJsuByp7o=; b=wyBJYj8sWXlNbw0oVZ5cqeo0Bu2lZBFYfY8mJnqnv5C2/mOsdjRMkUWwxjqeOjQSrr zfHwZae3KjskLrqmhww5Kjzzg7SoQjyVB8WcSixrxnznOjo94yUKqSqV3nJNK8Gstc9E QWZWQWi4OOyInbTbdMBvKuVLkZeZm3vv85iP40UWbtwSC5GlK0c2gAnuER7IzjRddLq8 gRG0ppXLiLW7AN+ZprkvzKp5On+DhNE1+n2WhxsCQLcgkmVtJLDxpSuWAjhrqduoUub/ PxIC0Py/fZOCubL6VJZeewjAkhgN16pD5/mqkZuYfS3juvQTnGY3CLcZkBt0I/Dim39M GwLw== X-Forwarded-Encrypted: i=1; AKwUvByD0lqWFIIc/OXdU4fnLbhOudzxc0jiJjLHa/IqncsxV+YLNC6yO3t21n0hcwXkz5EdlgHkbsm9wFtoQZk=@vger.kernel.org X-Gm-Message-State: AFuF++kF4T9cSH5NkIZHJq4ac2qIF2YZwULXEpUtG1S2pR3ez14QaQ1Q bktWQOwnL1v51K4Fgu6proXjWpjGdRlQE5PtkZ9TrQN51vAMx+IkhH/+ZSNb9u//krSSTE/gekZ AdMHA5E6eMN1FFEguwuDE/yB4MSU7vL6EjPElb+8cCv7F2eUFnezhB/ijrpE= 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:f02f:b0:6c7:cd95:f109 with SMTP id 006d021491bc7-6ca9b52b57emr1375904eaf.29.1789709461801; Thu, 17 Sep 2026 22:31:01 -0700 (PDT) Date: Thu, 17 Sep 2026 22:31:01 -0700 In-Reply-To: <20260918051712.24978-1-kartikey406@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6aaccc95.b398a7c9.1f86be.002f.GAE@google.com> Subject: Re: [syzbot] [media?] KASAN: slab-use-after-free Read in __dynamic_dev_dbg From: syzbot To: kartikey406@gmail.com, 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 '[localhost]:54685' (ED25519) to the list of kno= wn hosts. 2026/09/18 05:30:02 parsed 1 programs 2026/09/18 05:30:02 serving rpc on tcp://32951 [ 47.745155][ T5743] cgroup: Unknown subsys name 'net' [ 47.852384][ T5743] cgroup: Unknown subsys name 'cpuset' [ 47.856459][ T5743] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size =3D 127995904 bytes [ 48.886846][ T5743] Adding 124996k swap on ./swap-file. Priority:0 exte= nts:1 across:124996k=20 [ 51.358683][ T5755] 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. [ 51.365586][ T5755] ebtables: xtables 32bit compat interface no longer s= upported in namespaces and will be removed soon. [ 51.375529][ T5755] arp_tables: xtables 32bit compat interface no longer= supported in namespaces and will be removed soon. [ 51.379024][ T37] wlan0: Created IBSS using preconfigured BSSID 50:50:= 50:50:50:50 [ 51.379041][ T37] wlan0: Creating new IBSS network, BSSID 50:50:50:50:= 50:50 [ 51.518286][ T228] wlan1: Created IBSS using preconfigured BSSID 50:50:= 50:50:50:50 [ 51.518311][ T228] wlan1: Creating new IBSS network, BSSID 50:50:50:50:= 50:50 [ 52.518770][ T66] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > = 1 [ 52.526974][ T66] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > = 9 [ 52.535189][ T66] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > = 9 [ 52.539813][ T66] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > = 4 [ 52.540335][ T66] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > = 2 [ 52.541643][ T5769] bridge0: port 1(bridge_slave_0) entered blocking sta= te [ 52.542691][ T5769] bridge0: port 1(bridge_slave_0) entered disabled sta= te [ 52.542775][ T5769] bridge_slave_0: entered allmulticast mode [ 52.545963][ T5769] bridge_slave_0: entered promiscuous mode [ 52.558325][ T5769] bridge0: port 2(bridge_slave_1) entered blocking sta= te [ 52.558372][ T5769] bridge0: port 2(bridge_slave_1) entered disabled sta= te [ 52.558428][ T5769] bridge_slave_1: entered allmulticast mode [ 52.560598][ T5769] bridge_slave_1: entered promiscuous mode [ 52.584378][ T5769] bond0: (slave bond_slave_0): Enslaving as an active = interface with an up link [ 52.611029][ T5769] bond0: (slave bond_slave_1): Enslaving as an active = interface with an up link [ 52.648950][ T5769] team0: Port device team_slave_0 added [ 52.660980][ T5769] team0: Port device team_slave_1 added [ 52.719483][ T5769] batman_adv: batadv0: Adding interface: batadv_slave_= 0 [ 52.719500][ T5769] 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. [ 52.719521][ T5769] batman_adv: batadv0: Not using interface batadv_slav= e_0 (retrying later): interface not active [ 52.737518][ T5769] batman_adv: batadv0: Adding interface: batadv_slave_= 1 [ 52.737533][ T5769] 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. [ 52.737551][ T5769] batman_adv: batadv0: Not using interface batadv_slav= e_1 (retrying later): interface not active [ 52.909782][ T5809] ip_tables: xtables 32bit compat interface no longer = supported in namespaces and will be removed soon. [ 52.910132][ T5809] ip6_tables: xtables 32bit compat interface no longer= supported in namespaces and will be removed soon. [ 52.936259][ T5769] hsr_slave_0: entered promiscuous mode [ 52.942371][ T5769] hsr_slave_1: entered promiscuous mode [ 53.428872][ T5769] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 53.436610][ T5769] 8021q: adding VLAN 0 to HW filter on device netdevsi= m0 [ 53.437232][ T5769] netdevsim netdevsim4 netdevsim1: renamed from eth1 [ 53.441662][ T5769] 8021q: adding VLAN 0 to HW filter on device netdevsi= m1 [ 53.442889][ T5769] netdevsim netdevsim4 netdevsim2: renamed from eth2 [ 53.457545][ T5769] 8021q: adding VLAN 0 to HW filter on device netdevsi= m2 [ 53.468017][ T5769] netdevsim netdevsim4 netdevsim3: renamed from eth3 [ 53.472353][ T5769] 8021q: adding VLAN 0 to HW filter on device netdevsi= m3 [ 53.554786][ T5769] 8021q: adding VLAN 0 to HW filter on device bond0 [ 53.574890][ T5769] 8021q: adding VLAN 0 to HW filter on device team0 [ 53.583923][ T37] bridge0: port 1(bridge_slave_0) entered blocking sta= te [ 53.584039][ T37] bridge0: port 1(bridge_slave_0) entered forwarding s= tate [ 53.592421][ T37] bridge0: port 2(bridge_slave_1) entered blocking sta= te [ 53.592552][ T37] bridge0: port 2(bridge_slave_1) entered forwarding s= tate [ 53.917390][ T5769] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 54.072213][ T5769] veth0_vlan: entered promiscuous mode [ 54.077626][ T5769] veth1_vlan: entered promiscuous mode [ 54.092533][ T5769] veth0_macvtap: entered promiscuous mode [ 54.094902][ T5769] veth1_macvtap: entered promiscuous mode [ 54.106231][ T5769] batman_adv: batadv0: Interface activated: batadv_sla= ve_0 [ 54.111897][ T5769] batman_adv: batadv0: Interface activated: batadv_sla= ve_1 [ 54.141095][ T12] netdevsim netdevsim4 netdevsim3: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 54.141137][ T12] netdevsim netdevsim4 netdevsim2: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 54.141165][ T12] netdevsim netdevsim4 netdevsim1: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 54.141194][ T12] netdevsim netdevsim4 netdevsim0: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 54.184771][ T12] netdevsim netdevsim4 netdevsim3 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 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). [ 54.261521][ T12] netdevsim netdevsim4 netdevsim2 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 [ 54.340989][ T12] netdevsim netdevsim4 netdevsim1 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 [ 54.428677][ T12] netdevsim netdevsim4 netdevsim0 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 [ 55.676684][ T12] bridge_slave_1: left allmulticast mode [ 55.676720][ T12] bridge_slave_1: left promiscuous mode [ 55.679098][ T12] bridge0: port 2(bridge_slave_1) entered disabled sta= te [ 55.685646][ T12] bridge_slave_0: left allmulticast mode [ 55.685669][ T12] bridge_slave_0: left promiscuous mode [ 55.685832][ T12] bridge0: port 1(bridge_slave_0) entered disabled sta= te [ 55.793840][ T12] bond0 (unregistering): (slave bond_slave_0): Releasi= ng backup interface [ 55.796673][ T12] bond0 (unregistering): (slave bond_slave_1): Releasi= ng backup interface [ 55.798080][ T12] bond0 (unregistering): Released all slaves [ 55.875181][ T5450] 8021q: adding VLAN 0 to HW filter on device eth2 [ 55.907074][ T12] hsr_slave_0: left promiscuous mode [ 55.907494][ T12] hsr_slave_1: left promiscuous mode [ 55.907913][ T12] batman_adv: batadv0: Interface deactivated: batadv_s= lave_0 [ 55.907928][ T12] batman_adv: batadv0: Removing interface: batadv_slav= e_0 [ 55.908530][ T12] batman_adv: batadv0: Interface deactivated: batadv_s= lave_1 [ 55.908540][ T12] batman_adv: batadv0: Removing interface: batadv_slav= e_1 [ 55.917255][ T12] veth1_macvtap: left promiscuous mode [ 55.917296][ T12] veth0_macvtap: left promiscuous mode [ 55.917345][ T12] veth1_vlan: left promiscuous mode [ 55.917401][ T12] veth0_vlan: left promiscuous mode [ 56.037674][ T12] team0 (unregistering): Port device team_slave_1 remo= ved [ 56.054457][ T12] team0 (unregistering): Port device team_slave_0 remo= ved [ 56.103005][ T5450] 8021q: adding VLAN 0 to HW filter on device eth3 [ 56.289426][ T5450] 8021q: adding VLAN 0 to HW filter on device eth4 [ 56.450317][ T5450] 8021q: adding VLAN 0 to HW filter on device eth5 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-build3502523694=3D/tmp/go-build -gno-record-gc= c-switches' GOHOSTARCH=3D'amd64' GOHOSTOS=3D'linux' GOINSECURE=3D'' GOMOD=3D'/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/go.mo= d' GOMODCACHE=3D'/syzkaller/jobs/linux/gopath/pkg/mod' GONOPROXY=3D'' GONOSUMDB=3D'' GOOS=3D'linux' GOPATH=3D'/syzkaller/jobs/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 f41e228a2e7 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=3Df41e228a2e7b883d75a56aa602070c9893ccb54c -X github.com/goo= gle/syzkaller/prog.gitRevisionDate=3D20260915-092900" ./sys/syz-sysgen | g= rep -q false || go install -ldflags=3D"-s -w -X github.com/google/syzkaller= /prog.GitRevision=3Df41e228a2e7b883d75a56aa602070c9893ccb54c -X github.com/= google/syzkaller/prog.gitRevisionDate=3D20260915-092900" ./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=3Df41e228a2e7b883d75a56aa602070c9893ccb54c -X g= ithub.com/google/syzkaller/prog.gitRevisionDate=3D20260915-092900" -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\"f41e228a2e7b883d75a56aa602070c9893= ccb54c\" /usr/bin/ld: /tmp/ccyeqg4J.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: 5dd1818b Merge tag 'for-next-keys-v7.3-rc4' of git://g.. git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=3Dd61c584072d6137 dashboard link: https://syzkaller.appspot.com/bug?extid=3D9bfac891bdd42eb70= 8fc compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Deb= ian) 2.44 userspace arch: i386 patch: https://syzkaller.appspot.com/x/patch.diff?x=3D1741b8c95800= 00