Hello, syzbot tried to test the proposed patch but the build/boot failed:
50:50:50 [ 96.324372][ T4608] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 96.383532][ T13] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 96.388909][ T13] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 98.981820][ T4685] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 98.986155][ T4685] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 98.989980][ T4685] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 98.993960][ T4685] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 98.997492][ T4685] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 [ 101.080148][ T5400] chnl_net:caif_netlink_parms(): no params data found [ 101.260660][ T5400] bridge0: port 1(bridge_slave_0) entered blocking state [ 101.271979][ T5400] bridge0: port 1(bridge_slave_0) entered disabled state [ 101.275128][ T5400] bridge_slave_0: entered allmulticast mode [ 101.291786][ T5400] bridge_slave_0: entered promiscuous mode [ 101.298693][ T5400] bridge0: port 2(bridge_slave_1) entered blocking state [ 101.309121][ T5400] bridge0: port 2(bridge_slave_1) entered disabled state [ 101.312608][ T5400] bridge_slave_1: entered allmulticast mode [ 101.321527][ T5400] bridge_slave_1: entered promiscuous mode [ 101.374348][ T5400] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 101.394422][ T5400] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 101.443124][ T5400] team0: Port device team_slave_0 added [ 101.452091][ T5400] team0: Port device team_slave_1 added [ 101.495794][ T5400] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 101.498939][ T5400] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem. [ 101.541327][ T5400] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 101.571912][ T5400] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 101.574976][ T5400] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem. [ 101.611346][ T5400] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 101.716466][ T5400] hsr_slave_0: entered promiscuous mode [ 101.720143][ T5400] hsr_slave_1: entered promiscuous mode [ 102.035333][ T5400] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 102.057801][ T5400] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 102.066664][ T5400] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 102.085706][ T5400] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 102.225047][ T5400] 8021q: adding VLAN 0 to HW filter on device bond0 [ 102.254868][ T5400] 8021q: adding VLAN 0 to HW filter on device team0 [ 102.295073][ T1127] bridge0: port 1(bridge_slave_0) entered blocking state [ 102.298513][ T1127] bridge0: port 1(bridge_slave_0) entered forwarding state [ 102.313626][ T1127] bridge0: port 2(bridge_slave_1) entered blocking state [ 102.316779][ T1127] bridge0: port 2(bridge_slave_1) entered forwarding state [ 102.538955][ T5400] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 102.576951][ T5400] veth0_vlan: entered promiscuous mode [ 102.584258][ T5400] veth1_vlan: entered promiscuous mode [ 102.606836][ T5400] veth0_macvtap: entered promiscuous mode [ 102.617483][ T5400] veth1_macvtap: entered promiscuous mode [ 102.631115][ T5400] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 102.644037][ T5400] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 102.656266][ T4637] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 102.667017][ T4637] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 102.678832][ T4637] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 102.699431][ T4637] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 102.827338][ T4637] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 102.874563][ T4637] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 102.916861][ T4637] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 102.955081][ T4637] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 2026/01/07 10:04:23 executed programs: 0 [ 103.704543][ T47] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 103.708655][ T47] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 103.713035][ T47] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 103.716711][ T47] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 103.720706][ T47] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 [ 103.874928][ T5441] chnl_net:caif_netlink_parms(): no params data found [ 104.002432][ T5441] bridge0: port 1(bridge_slave_0) entered blocking state [ 104.005631][ T5441] bridge0: port 1(bridge_slave_0) entered disabled state [ 104.009058][ T5441] bridge_slave_0: entered allmulticast mode [ 104.025056][ T5441] bridge_slave_0: entered promiscuous mode [ 104.033625][ T5441] bridge0: port 2(bridge_slave_1) entered blocking state [ 104.037020][ T5441] bridge0: port 2(bridge_slave_1) entered disabled state [ 104.040130][ T5441] bridge_slave_1: entered allmulticast mode [ 104.053666][ T5441] bridge_slave_1: entered promiscuous mode [ 104.115026][ T5441] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 104.136512][ T5441] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 104.178539][ T5441] team0: Port device team_slave_0 added [ 104.183425][ T5441] team0: Port device team_slave_1 added [ 104.207708][ T5441] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 104.210805][ T5441] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem. [ 104.223299][ T5441] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 104.230664][ T5441] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 104.234253][ T5441] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem. [ 104.246544][ T5441] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 104.281972][ T5441] hsr_slave_0: entered promiscuous mode [ 104.285329][ T5441] hsr_slave_1: entered promiscuous mode [ 104.288328][ T5441] debugfs: 'hsr0' already exists in 'hsr' [ 104.290838][ T5441] Cannot create hsr debugfs directory [ 105.062924][ T4637] bridge_slave_1: left allmulticast mode [ 105.065283][ T4637] bridge_slave_1: left promiscuous mode [ 105.072635][ T4637] bridge0: port 2(bridge_slave_1) entered disabled state [ 105.084121][ T4637] bridge_slave_0: left allmulticast mode [ 105.086616][ T4637] bridge_slave_0: left promiscuous mode [ 105.089229][ T4637] bridge0: port 1(bridge_slave_0) entered disabled state [ 105.434250][ T4637] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 105.441979][ T4637] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 105.446733][ T4637] bond0 (unregistering): Released all slaves [ 105.546762][ T4637] hsr_slave_0: left promiscuous mode [ 105.561587][ T4637] hsr_slave_1: left promiscuous mode [ 105.564672][ T4637] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 105.568054][ T4637] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 105.578013][ T4637] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 105.581111][ T4637] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 105.608041][ T4637] veth1_macvtap: left promiscuous mode [ 105.610648][ T4637] veth0_macvtap: left promiscuous mode [ 105.628271][ T4637] veth1_vlan: left promiscuous mode [ 105.632462][ T4637] veth0_vlan: left promiscuous mode [ 105.736315][ T47] Bluetooth: hci0: command tx timeout [ 106.107211][ T4637] team0 (unregistering): Port device team_slave_1 removed [ 106.134290][ T4637] team0 (unregistering): Port device team_slave_0 removed [ 106.578691][ T5441] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 106.599515][ T5441] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 106.616734][ T5441] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 106.630262][ T5441] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 107.173027][ T5441] 8021q: adding VLAN 0 to HW filter on device bond0 [ 107.206957][ T5441] 8021q: adding VLAN 0 to HW filter on device team0 [ 107.255745][ T3440] bridge0: port 1(bridge_slave_0) entered blocking state [ 107.259102][ T3440] bridge0: port 1(bridge_slave_0) entered forwarding state [ 107.305836][ T3440] bridge0: port 2(bridge_slave_1) entered blocking state [ 107.309126][ T3440] bridge0: port 2(bridge_slave_1) entered forwarding state [ 107.468490][ T5441] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 107.504820][ T5441] veth0_vlan: entered promiscuous mode [ 107.513636][ T5441] veth1_vlan: entered promiscuous mode [ 107.533127][ T5441] veth0_macvtap: entered promiscuous mode [ 107.538225][ T5441] veth1_macvtap: entered promiscuous mode [ 107.551007][ T5441] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 107.563537][ T5441] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 107.573370][ T13] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 107.583446][ T13] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 107.587551][ T13] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 107.620236][ T13] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 107.687153][ T3440] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 107.690521][ T3440] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 107.739992][ T13] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 107.744091][ T13] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 107.821622][ T47] Bluetooth: hci0: command tx timeout SYZFAIL: failed to recv rpc fd=3 want=4 recv=0 n=0 (errno 9: Bad file descriptor) [ 109.064804][ T3440] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 110.112799][ T3440] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 110.530922][ T3440] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 110.573006][ T3440] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 110.696901][ T3440] bridge_slave_1: left allmulticast mode [ 110.699371][ T3440] bridge_slave_1: left promiscuous mode [ 110.712675][ T3440] bridge0: port 2(bridge_slave_1) entered disabled state [ 110.717544][ T3440] bridge_slave_0: left allmulticast mode [ 110.720008][ T3440] bridge_slave_0: left promiscuous mode [ 110.724098][ T3440] bridge0: port 1(bridge_slave_0) entered disabled state [ 111.067299][ T3440] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 111.073241][ T3440] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 111.077962][ T3440] bond0 (unregistering): Released all slaves [ 111.288410][ T3440] hsr_slave_0: left promiscuous mode [ 111.290938][ T3440] hsr_slave_1: left promiscuous mode [ 111.302397][ T3440] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 111.305777][ T3440] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 111.326508][ T3440] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 111.329929][ T3440] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 111.348723][ T3440] veth1_macvtap: left promiscuous mode [ 111.362446][ T3440] veth0_macvtap: left promiscuous mode [ 111.365101][ T3440] veth1_vlan: left promiscuous mode [ 111.367513][ T3440] veth0_vlan: left promiscuous mode [ 111.699085][ T3440] team0 (unregistering): Port device team_slave_1 removed [ 111.720608][ T3440] team0 (unregistering): Port device team_slave_0 removed syzkaller build log: go env (err=<nil>) AR='ar' CC='gcc' CGO_CFLAGS='-O2 -g' CGO_CPPFLAGS='' CGO_CXXFLAGS='-O2 -g' CGO_ENABLED='1' CGO_FFLAGS='-O2 -g' CGO_LDFLAGS='-O2 -g' CXX='g++' GCCGO='gccgo' GO111MODULE='auto' GOAMD64='v1' GOARCH='amd64' GOAUTH='netrc' GOBIN='' GOCACHE='/syzkaller/.cache/go-build' GOCACHEPROG='' GODEBUG='' GOENV='/syzkaller/.config/go/env' GOEXE='' GOEXPERIMENT='' GOFIPS140='off' GOFLAGS='' GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build1275535676=/tmp/go-build -gno-record-gcc-switches' GOHOSTARCH='amd64' GOHOSTOS='linux' GOINSECURE='' GOMOD='/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/go.mod' GOMODCACHE='/syzkaller/jobs/linux/gopath/pkg/mod' GONOPROXY='' GONOSUMDB='' GOOS='linux' GOPATH='/syzkaller/jobs/linux/gopath' GOPRIVATE='' GOPROXY='https://proxy.golang.org,direct' GOROOT='/usr/local/go' GOSUMDB='sum.golang.org' GOTELEMETRY='local' GOTELEMETRYDIR='/syzkaller/.config/go/telemetry' GOTMPDIR='' GOTOOLCHAIN='auto' GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64' GOVCS='' GOVERSION='go1.24.4' GOWORK='' PKG_CONFIG='pkg-config' git status (err=<nil>) HEAD detached at d1b870e1003b 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/contributing.md#using-syz-env go list -f '{{.Stale}}' -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=d1b870e1003b52891d2196c1e2ee42fe905010ba -X github.com/google/syzkaller/prog.gitRevisionDate=20251128-125159" ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=d1b870e1003b52891d2196c1e2ee42fe905010ba -X github.com/google/syzkaller/prog.gitRevisionDate=20251128-125159" ./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/contributing.md#using-syz-env bin/syz-sysgen touch .descriptions GOOS=linux GOARCH=amd64 go build -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=d1b870e1003b52891d2196c1e2ee42fe905010ba -X github.com/google/syzkaller/prog.gitRevisionDate=20251128-125159" -o ./bin/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 -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -std=c++17 -I. -Iexecutor/_include -DGOOS_linux=1 -DGOARCH_amd64=1 \ -DHOSTGOOS_linux=1 -DGIT_REVISION=\"d1b870e1003b52891d2196c1e2ee42fe905010ba\" /usr/bin/ld: /tmp/cc4qdZbn.o: in function `Connection::Connect(char const*, char const*)': executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x104): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for 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=15dbee9a580000 Tested on: commit: 1860d530 f2fs: fix to avoid UAF in f2fs_write_end_io() git tree: https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git bugfix/syzbot kernel config: https://syzkaller.appspot.com/x/.config?x=513255d80ab78f2b dashboard link: https://syzkaller.appspot.com/bug?extid=b4444e3c972a7a124187 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 Note: no patches were applied. _______________________________________________ Linux-f2fs-devel mailing list [email protected] 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