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AJvYcCXOS4ZoxoOd/5mg6FY7WgJ9yjMZ77iGBnKABMHZNxcWVHJJjJO1+zChV13WsVEvJ1OPMkZOziKp0rngKTI=@vger.kernel.org X-Gm-Message-State: AOJu0YyTEdWbSnYWv7URAnYlXty1NEvF6OFPvqArKVCuoGWIzLcVxdKs dLb7+ZDErpkUoBy0sly1Ck98RpYMQ2vCvXxKykH85YrtMGk3ZK48UMkmynUxlUfoPAxLZ287OVF sox3zIkhZGDzJ60C/QS3svLZS11vW4ub1T799mvO3fxTZunLTCzMHfWoZN0s= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:460c:b0:662:fbdd:1ace with SMTP id 006d021491bc7-6630f02e35bmr4904296eaf.30.1770106924069; Tue, 03 Feb 2026 00:22:04 -0800 (PST) Date: Tue, 03 Feb 2026 00:22:04 -0800 In-Reply-To: <20260203075236.376876-1-kartikey406@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6981b02c.a00a0220.34fa92.0006.GAE@google.com> Subject: Re: [syzbot] [ext4?] kernel BUG in ext4_write_inline_data (4) 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: [ 115.737028][ T5139] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > = 1 [ 115.745623][ T5139] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > = 9 [ 115.753680][ T5139] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > = 9 [ 115.762195][ T5139] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > = 4 [ 115.770008][ T5139] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > = 2 [ 117.565426][ T5866] chnl_net:caif_netlink_parms(): no params data found [ 118.101590][ T5866] bridge0: port 1(bridge_slave_0) entered blocking sta= te [ 118.109810][ T5866] bridge0: port 1(bridge_slave_0) entered disabled sta= te [ 118.117325][ T5866] bridge_slave_0: entered allmulticast mode [ 118.147613][ T5866] bridge_slave_0: entered promiscuous mode [ 118.398433][ T5866] bridge0: port 2(bridge_slave_1) entered blocking sta= te [ 118.405848][ T5866] bridge0: port 2(bridge_slave_1) entered disabled sta= te [ 118.413476][ T5866] bridge_slave_1: entered allmulticast mode [ 118.421980][ T5866] bridge_slave_1: entered promiscuous mode [ 118.477269][ T5866] bond0: (slave bond_slave_0): Enslaving as an active = interface with an up link [ 118.501071][ T5866] bond0: (slave bond_slave_1): Enslaving as an active = interface with an up link [ 118.669335][ T5866] team0: Port device team_slave_0 added [ 118.682494][ T5866] team0: Port device team_slave_1 added [ 118.748530][ T37] wlan0: Created IBSS using preconfigured BSSID 50:50:= 50:50:50:50 [ 118.776393][ T37] wlan0: Creating new IBSS network, BSSID 50:50:50:50:= 50:50 [ 118.826104][ T5866] batman_adv: batadv0: Adding interface: batadv_slave_= 0 [ 118.833113][ T5866] 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. [ 118.859988][ T5866] batman_adv: batadv0: Not using interface batadv_slav= e_0 (retrying later): interface not active [ 118.915653][ T5866] batman_adv: batadv0: Adding interface: batadv_slave_= 1 [ 118.922656][ T5866] 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. [ 118.974696][ T5866] batman_adv: batadv0: Not using interface batadv_slav= e_1 (retrying later): interface not active [ 119.007284][ T37] wlan1: Created IBSS using preconfigured BSSID 50:50:= 50:50:50:50 [ 119.026222][ T37] wlan1: Creating new IBSS network, BSSID 50:50:50:50:= 50:50 [ 119.114830][ T5866] hsr_slave_0: entered promiscuous mode [ 119.136943][ T5866] hsr_slave_1: entered promiscuous mode [ 119.432503][ T5866] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 119.447497][ T5866] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 119.458834][ T5866] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 119.469701][ T5866] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 119.563018][ T5866] 8021q: adding VLAN 0 to HW filter on device bond0 [ 119.586277][ T5866] 8021q: adding VLAN 0 to HW filter on device team0 [ 119.601598][ T12] bridge0: port 1(bridge_slave_0) entered blocking sta= te [ 119.608955][ T12] bridge0: port 1(bridge_slave_0) entered forwarding s= tate [ 119.627386][ T2898] bridge0: port 2(bridge_slave_1) entered blocking sta= te [ 119.634550][ T2898] bridge0: port 2(bridge_slave_1) entered forwarding s= tate [ 119.882615][ T5866] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 119.931648][ T5866] veth0_vlan: entered promiscuous mode [ 119.947109][ T5866] veth1_vlan: entered promiscuous mode [ 119.979256][ T5866] veth0_macvtap: entered promiscuous mode [ 119.990698][ T5866] veth1_macvtap: entered promiscuous mode [ 120.012667][ T5866] batman_adv: batadv0: Interface activated: batadv_sla= ve_0 [ 120.030121][ T5866] batman_adv: batadv0: Interface activated: batadv_sla= ve_1 [ 120.047991][ T12] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 120.062365][ T12] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 120.078098][ T12] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 120.087483][ T12] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 f= amily 0 port 6081 - 0 2026/02/03 08:21:00 executed programs: 0 [ 120.268277][ T52] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > = 1 [ 120.280246][ T52] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > = 9 [ 120.282551][ T38] netdevsim netdevsim0 netdevsim3 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 [ 120.288610][ T52] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > = 9 [ 120.308676][ T52] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > = 4 [ 120.319659][ T52] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > = 2 [ 120.397996][ T38] netdevsim netdevsim0 netdevsim2 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 [ 120.461411][ T38] netdevsim netdevsim0 netdevsim1 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 [ 120.566850][ T38] netdevsim netdevsim0 netdevsim0 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 [ 120.595322][ T5934] chnl_net:caif_netlink_parms(): no params data found [ 120.692126][ T5934] bridge0: port 1(bridge_slave_0) entered blocking sta= te [ 120.700477][ T5934] bridge0: port 1(bridge_slave_0) entered disabled sta= te [ 120.707832][ T5934] bridge_slave_0: entered allmulticast mode [ 120.715437][ T5934] bridge_slave_0: entered promiscuous mode [ 120.727578][ T5934] bridge0: port 2(bridge_slave_1) entered blocking sta= te [ 120.734814][ T5934] bridge0: port 2(bridge_slave_1) entered disabled sta= te [ 120.742283][ T5934] bridge_slave_1: entered allmulticast mode [ 120.750265][ T5934] bridge_slave_1: entered promiscuous mode [ 120.794480][ T5934] bond0: (slave bond_slave_0): Enslaving as an active = interface with an up link [ 120.807902][ T5934] bond0: (slave bond_slave_1): Enslaving as an active = interface with an up link [ 120.849234][ T5934] team0: Port device team_slave_0 added [ 120.860920][ T5934] team0: Port device team_slave_1 added [ 120.895391][ T5934] batman_adv: batadv0: Adding interface: batadv_slave_= 0 [ 120.903012][ T5934] 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. [ 120.930037][ T5934] batman_adv: batadv0: Not using interface batadv_slav= e_0 (retrying later): interface not active [ 120.944593][ T5934] batman_adv: batadv0: Adding interface: batadv_slave_= 1 [ 120.951991][ T5934] 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. [ 120.978209][ T5934] batman_adv: batadv0: Not using interface batadv_slav= e_1 (retrying later): interface not active [ 121.040031][ T5934] hsr_slave_0: entered promiscuous mode [ 121.047352][ T5934] hsr_slave_1: entered promiscuous mode [ 121.053630][ T5934] debugfs: 'hsr0' already exists in 'hsr' [ 121.059660][ T5934] Cannot create hsr debugfs directory [ 122.376418][ T5139] Bluetooth: hci0: command tx timeout [ 122.795041][ T38] bridge_slave_1: left allmulticast mode [ 122.801314][ T38] bridge_slave_1: left promiscuous mode [ 122.809322][ T38] bridge0: port 2(bridge_slave_1) entered disabled sta= te [ 122.822491][ T38] bridge_slave_0: left allmulticast mode [ 122.829206][ T38] bridge_slave_0: left promiscuous mode [ 122.834952][ T38] bridge0: port 1(bridge_slave_0) entered disabled sta= te [ 123.048250][ T38] bond0 (unregistering): (slave bond_slave_0): Releasi= ng backup interface [ 123.060120][ T38] bond0 (unregistering): (slave bond_slave_1): Releasi= ng backup interface [ 123.078027][ T38] bond0 (unregistering): Released all slaves [ 123.183531][ T38] hsr_slave_0: left promiscuous mode [ 123.193152][ T38] hsr_slave_1: left promiscuous mode [ 123.199945][ T38] batman_adv: batadv0: Interface deactivated: batadv_s= lave_0 [ 123.209756][ T38] batman_adv: batadv0: Removing interface: batadv_slav= e_0 [ 123.223968][ T38] batman_adv: batadv0: Interface deactivated: batadv_s= lave_1 [ 123.231842][ T38] batman_adv: batadv0: Removing interface: batadv_slav= e_1 [ 123.255322][ T38] veth1_macvtap: left promiscuous mode [ 123.261256][ T38] veth0_macvtap: left promiscuous mode [ 123.269082][ T38] veth1_vlan: left promiscuous mode [ 123.274496][ T38] veth0_vlan: left promiscuous mode [ 123.779508][ T38] team0 (unregistering): Port device team_slave_1 remo= ved [ 123.809216][ T38] team0 (unregistering): Port device team_slave_0 remo= ved [ 124.223362][ T5934] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 124.251383][ T5934] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 124.264544][ T5934] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 124.277620][ T5934] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 124.421915][ T5934] 8021q: adding VLAN 0 to HW filter on device bond0 [ 124.447497][ T5934] 8021q: adding VLAN 0 to HW filter on device team0 [ 124.456324][ T5139] Bluetooth: hci0: command tx timeout [ 124.471199][ T72] bridge0: port 1(bridge_slave_0) entered blocking sta= te [ 124.478408][ T72] bridge0: port 1(bridge_slave_0) entered forwarding s= tate [ 124.498560][ T38] bridge0: port 2(bridge_slave_1) entered blocking sta= te [ 124.505754][ T38] bridge0: port 2(bridge_slave_1) entered forwarding s= tate [ 124.853982][ T5934] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 124.921020][ T5934] veth0_vlan: entered promiscuous mode [ 124.932906][ T5934] veth1_vlan: entered promiscuous mode [ 124.965922][ T5934] veth0_macvtap: entered promiscuous mode [ 124.979333][ T5934] veth1_macvtap: entered promiscuous mode [ 124.999208][ T5934] batman_adv: batadv0: Interface activated: batadv_sla= ve_0 [ 125.015270][ T5934] batman_adv: batadv0: Interface activated: batadv_sla= ve_1 [ 125.032513][ T13] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 125.042018][ T13] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 125.057876][ T13] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 125.067233][ T13] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 125.137953][ T13] wlan0: Created IBSS using preconfigured BSSID 50:50:= 50:50:50:50 [ 125.153560][ T13] wlan0: Creating new IBSS network, BSSID 50:50:50:50:= 50:50 [ 125.188192][ T38] wlan1: Created IBSS using preconfigured BSSID 50:50:= 50:50:50:50 [ 125.196770][ T38] wlan1: Creating new IBSS network, BSSID 50:50:50:50:= 50:50 [ 126.761790][ T2898] netdevsim netdevsim0 netdevsim3 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 [ 128.218574][ T2898] netdevsim netdevsim0 netdevsim2 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 [ 128.308291][ T2898] netdevsim netdevsim0 netdevsim1 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 [ 128.398270][ T2898] netdevsim netdevsim0 netdevsim0 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 [ 128.550848][ T2898] bridge_slave_1: left allmulticast mode [ 128.562154][ T2898] bridge_slave_1: left promiscuous mode [ 128.568697][ T2898] bridge0: port 2(bridge_slave_1) entered disabled sta= te [ 128.578506][ T2898] bridge_slave_0: left allmulticast mode [ 128.584282][ T2898] bridge_slave_0: left promiscuous mode [ 128.591339][ T2898] bridge0: port 1(bridge_slave_0) entered disabled sta= te [ 128.826554][ T2898] bond0 (unregistering): (slave bond_slave_0): Releasi= ng backup interface [ 128.838167][ T2898] bond0 (unregistering): (slave bond_slave_1): Releasi= ng backup interface [ 128.848407][ T2898] bond0 (unregistering): Released all slaves [ 129.180084][ T2898] hsr_slave_0: left promiscuous mode [ 129.190184][ T2898] hsr_slave_1: left promiscuous mode [ 129.197878][ T2898] batman_adv: batadv0: Interface deactivated: batadv_s= lave_0 [ 129.205281][ T2898] batman_adv: batadv0: Removing interface: batadv_slav= e_0 [ 129.213895][ T2898] batman_adv: batadv0: Interface deactivated: batadv_s= lave_1 [ 129.221811][ T2898] batman_adv: batadv0: Removing interface: batadv_slav= e_1 [ 129.246390][ T2898] veth1_macvtap: left promiscuous mode [ 129.255979][ T2898] veth0_macvtap: left promiscuous mode [ 129.261712][ T2898] veth1_vlan: left promiscuous mode [ 129.267406][ T2898] veth0_vlan: left promiscuous mode [ 129.689185][ T2898] team0 (unregistering): Port device team_slave_1 remo= ved [ 129.721369][ T2898] team0 (unregistering): Port device team_slave_0 remo= ved 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-build4132501190=3D/tmp/go-build -gno-record-gc= c-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'go1.24.4' GOWORK=3D'' PKG_CONFIG=3D'pkg-config' git status (err=3D) HEAD detached at 6b8752f20c 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=3D6b8752f20c06eee857545047ab920e63322bf4c8 -X github.com/goo= gle/syzkaller/prog.gitRevisionDate=3D20260131-204520" ./sys/syz-sysgen | g= rep -q false || go install -ldflags=3D"-s -w -X github.com/google/syzkaller= /prog.GitRevision=3D6b8752f20c06eee857545047ab920e63322bf4c8 -X github.com/= google/syzkaller/prog.gitRevisionDate=3D20260131-204520" ./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=3D6b8752f20c06eee857545047ab920e63322bf4c8 -X g= ithub.com/google/syzkaller/prog.gitRevisionDate=3D20260131-204520" -o ./bi= n/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog mkdir -p ./bin/linux_amd64 g++ -o ./bin/linux_amd64/syz-executor executor/executor.cc \ -m64 -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= _amd64=3D1 \ -DHOSTGOOS_linux=3D1 -DGIT_REVISION=3D\"6b8752f20c06eee857545047ab920e6332= 2bf4c8\" /usr/bin/ld: /tmp/cc6AYh6x.o: in function `Connection::Connect(char const*,= char const*)': executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEP= KcS1_]+0x386): 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 Error text is too large and was truncated, full error text is at: https://syzkaller.appspot.com/x/error.txt?x=3D1298c25a580000 Tested on: commit: 6bd9ed02 Merge tag 'cgroup-for-6.19-rc8-fixes' of git:.. git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=3Dfea461e951c03b1= b dashboard link: https://syzkaller.appspot.com/bug?extid=3D7de5fe447862fc375= 76f compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Deb= ian) 2.44 patch: https://syzkaller.appspot.com/x/patch.diff?x=3D1277fbfa5800= 00