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charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hello, syzbot tried to test the proposed patch but the build/boot failed: 72.433667][ T5886] batman_adv: batadv0: Interface activated: batadv_slave= _0 [ 72.445739][ T5886] batman_adv: batadv0: Interface activated: batadv_sla= ve_1 [ 72.457663][ T5886] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 72.466980][ T5886] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 72.476086][ T5886] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 72.485383][ T5886] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 72.632760][ T4915] netdevsim netdevsim0 netdevsim3 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 [ 72.692574][ T4915] netdevsim netdevsim0 netdevsim2 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 [ 72.784028][ T4915] netdevsim netdevsim0 netdevsim1 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 [ 72.874605][ T4915] netdevsim netdevsim0 netdevsim0 (unregistering): uns= et [1, 0] type 2 family 0 port 6081 - 0 2025/03/16 01:22:38 executed programs: 0 [ 73.931356][ T5851] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > = 1 [ 73.940395][ T5851] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > = 9 [ 73.950465][ T5851] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > = 9 [ 73.960767][ T5851] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > = 4 [ 73.968729][ T5851] Bluetooth: hci0: unexpected cc 0x0c25 length: 249 > = 3 [ 73.976076][ T5851] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > = 2 [ 74.076074][ T5939] chnl_net:caif_netlink_parms(): no params data found [ 74.128718][ T5939] bridge0: port 1(bridge_slave_0) entered blocking sta= te [ 74.135896][ T5939] bridge0: port 1(bridge_slave_0) entered disabled sta= te [ 74.143357][ T5939] bridge_slave_0: entered allmulticast mode [ 74.150540][ T5939] bridge_slave_0: entered promiscuous mode [ 74.157725][ T5939] bridge0: port 2(bridge_slave_1) entered blocking sta= te [ 74.165646][ T5939] bridge0: port 2(bridge_slave_1) entered disabled sta= te [ 74.173064][ T5939] bridge_slave_1: entered allmulticast mode [ 74.179810][ T5939] bridge_slave_1: entered promiscuous mode [ 74.204642][ T5939] bond0: (slave bond_slave_0): Enslaving as an active = interface with an up link [ 74.215916][ T5939] bond0: (slave bond_slave_1): Enslaving as an active = interface with an up link [ 74.241618][ T5939] team0: Port device team_slave_0 added [ 74.250900][ T5939] team0: Port device team_slave_1 added [ 74.269595][ T5939] batman_adv: batadv0: Adding interface: batadv_slave_= 0 [ 74.276571][ T5939] 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 1560 would solve the problem. [ 74.303099][ T5939] batman_adv: batadv0: Not using interface batadv_slav= e_0 (retrying later): interface not active [ 74.316822][ T5939] batman_adv: batadv0: Adding interface: batadv_slave_= 1 [ 74.323877][ T5939] 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 1560 would solve the problem. [ 74.351065][ T5939] batman_adv: batadv0: Not using interface batadv_slav= e_1 (retrying later): interface not active [ 74.387353][ T5939] hsr_slave_0: entered promiscuous mode [ 74.393586][ T5939] hsr_slave_1: entered promiscuous mode [ 74.400465][ T5939] debugfs: Directory 'hsr0' with parent 'hsr' already = present! [ 74.408569][ T5939] Cannot create hsr debugfs directory [ 75.504126][ T4915] bridge_slave_1: left allmulticast mode [ 75.510136][ T4915] bridge_slave_1: left promiscuous mode [ 75.516970][ T4915] bridge0: port 2(bridge_slave_1) entered disabled sta= te [ 75.536981][ T4915] bridge_slave_0: left allmulticast mode [ 75.544581][ T4915] bridge_slave_0: left promiscuous mode [ 75.551159][ T4915] bridge0: port 1(bridge_slave_0) entered disabled sta= te [ 75.802024][ T4915] bond0 (unregistering): (slave bond_slave_0): Releasi= ng backup interface [ 75.814407][ T4915] bond0 (unregistering): (slave bond_slave_1): Releasi= ng backup interface [ 75.824472][ T4915] bond0 (unregistering): Released all slaves [ 75.921046][ T4915] hsr_slave_0: left promiscuous mode [ 75.927724][ T4915] hsr_slave_1: left promiscuous mode [ 75.936428][ T4915] batman_adv: batadv0: Interface deactivated: batadv_s= lave_0 [ 75.944464][ T4915] batman_adv: batadv0: Removing interface: batadv_slav= e_0 [ 75.955660][ T4915] batman_adv: batadv0: Interface deactivated: batadv_s= lave_1 [ 75.964004][ T4915] batman_adv: batadv0: Removing interface: batadv_slav= e_1 [ 75.985966][ T4915] veth1_macvtap: left promiscuous mode [ 75.994538][ T4915] veth0_macvtap: left promiscuous mode [ 76.001124][ T4915] veth1_vlan: left promiscuous mode [ 76.006763][ T4915] veth0_vlan: left promiscuous mode [ 76.029255][ T5148] Bluetooth: hci0: command tx timeout [ 76.386411][ T4915] team0 (unregistering): Port device team_slave_1 remo= ved [ 76.416643][ T4915] team0 (unregistering): Port device team_slave_0 remo= ved [ 76.680651][ T5503]=20 [ 76.682998][ T5503] =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D [ 76.689143][ T5503] WARNING: possible recursive locking detected [ 76.695340][ T5503] 6.14.0-rc6-syzkaller-gbfc6c67ec2d6-dirty #0 Not tain= ted [ 76.702636][ T5503] -------------------------------------------- [ 76.708784][ T5503] dhcpcd/5503 is trying to acquire lock: [ 76.714415][ T5503] ffff888030558d28 (&dev->lock){+.+.}-{4:4}, at: lapbe= th_device_event+0x766/0xa20 [ 76.723635][ T5503]=20 [ 76.723635][ T5503] but task is already holding lock: [ 76.731089][ T5503] ffff888029c3cd28 (&dev->lock){+.+.}-{4:4}, at: dev_c= hange_flags+0x120/0x270 [ 76.740207][ T5503]=20 [ 76.740207][ T5503] other info that might help us debug this: [ 76.748254][ T5503] Possible unsafe locking scenario: [ 76.748254][ T5503]=20 [ 76.755709][ T5503] CPU0 [ 76.758970][ T5503] ---- [ 76.762241][ T5503] lock(&dev->lock); [ 76.766387][ T5503] lock(&dev->lock); [ 76.770359][ T5503]=20 [ 76.770359][ T5503] *** DEADLOCK *** [ 76.770359][ T5503]=20 [ 76.778512][ T5503] May be due to missing lock nesting notation [ 76.778512][ T5503]=20 [ 76.786821][ T5503] 2 locks held by dhcpcd/5503: [ 76.791564][ T5503] #0: ffffffff8fed6cc8 (rtnl_mutex){+.+.}-{4:4}, at: = devinet_ioctl+0x34c/0x1d80 [ 76.800771][ T5503] #1: ffff888029c3cd28 (&dev->lock){+.+.}-{4:4}, at: = dev_change_flags+0x120/0x270 [ 76.810056][ T5503]=20 [ 76.810056][ T5503] stack backtrace: [ 76.815937][ T5503] CPU: 1 UID: 0 PID: 5503 Comm: dhcpcd Not tainted 6.1= 4.0-rc6-syzkaller-gbfc6c67ec2d6-dirty #0 [ 76.815948][ T5503] Hardware name: Google Google Compute Engine/Google C= ompute Engine, BIOS Google 02/12/2025 [ 76.815957][ T5503] Call Trace: [ 76.815964][ T5503] [ 76.815969][ T5503] dump_stack_lvl+0x241/0x360 [ 76.815985][ T5503] ? __pfx_dump_stack_lvl+0x10/0x10 [ 76.815995][ T5503] ? __pfx__printk+0x10/0x10 [ 76.816004][ T5503] ? lockdep_unlock+0x16a/0x300 [ 76.816019][ T5503] print_deadlock_bug+0x483/0x620 [ 76.816035][ T5503] validate_chain+0x15e2/0x5920 [ 76.816047][ T5503] ? is_bpf_text_address+0x26/0x2a0 [ 76.816056][ T5503] ? unwind_next_frame+0x18e6/0x22d0 [ 76.816070][ T5503] ? __pfx_validate_chain+0x10/0x10 [ 76.816079][ T5503] ? preempt_count_add+0x93/0x190 [ 76.816092][ T5503] ? is_bpf_text_address+0x285/0x2a0 [ 76.816100][ T5503] ? is_bpf_text_address+0x26/0x2a0 [ 76.816107][ T5503] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 76.816120][ T5503] ? kernel_text_address+0xa7/0xe0 [ 76.816130][ T5503] ? look_up_lock_class+0x77/0x170 [ 76.816141][ T5503] ? register_lock_class+0x102/0x980 [ 76.816155][ T5503] ? __pfx_register_lock_class+0x10/0x10 [ 76.816168][ T5503] ? mark_lock+0x9a/0x360 [ 76.816176][ T5503] __lock_acquire+0x1397/0x2100 [ 76.816193][ T5503] lock_acquire+0x1ed/0x550 [ 76.816205][ T5503] ? lapbeth_device_event+0x766/0xa20 [ 76.816216][ T5503] ? __pfx_lock_acquire+0x10/0x10 [ 76.816229][ T5503] ? __pfx___might_resched+0x10/0x10 [ 76.816243][ T5503] __mutex_lock+0x19c/0x1010 [ 76.816255][ T5503] ? lapbeth_device_event+0x766/0xa20 [ 76.816264][ T5503] ? __asan_memset+0x23/0x50 [ 76.816274][ T5503] ? lapbeth_device_event+0x766/0xa20 [ 76.816283][ T5503] ? __pfx___mutex_lock+0x10/0x10 [ 76.816298][ T5503] ? __raw_spin_lock_init+0x45/0x100 [ 76.816310][ T5503] lapbeth_device_event+0x766/0xa20 [ 76.816319][ T5503] notifier_call_chain+0x1a5/0x3f0 [ 76.816334][ T5503] __dev_notify_flags+0x207/0x400 [ 76.816345][ T5503] ? dev_set_rx_mode+0xb8/0x2e0 [ 76.816354][ T5503] ? __pfx___dev_notify_flags+0x10/0x10 [ 76.816363][ T5503] ? __dev_change_flags+0x515/0x6f0 [ 76.816372][ T5503] ? __pfx___mutex_lock+0x10/0x10 [ 76.816383][ T5503] ? __pfx___dev_change_flags+0x10/0x10 [ 76.816393][ T5503] ? __pfx___mutex_lock+0x10/0x10 [ 76.816404][ T5503] netif_change_flags+0xf0/0x1a0 [ 76.816414][ T5503] dev_change_flags+0x146/0x270 [ 76.816424][ T5503] devinet_ioctl+0xea2/0x1d80 [ 76.816440][ T5503] ? __pfx_devinet_ioctl+0x10/0x10 [ 76.816453][ T5503] ? get_user_ifreq+0x1bb/0x200 [ 76.816465][ T5503] inet_ioctl+0x3d7/0x4f0 [ 76.816476][ T5503] ? __pfx_inet_ioctl+0x10/0x10 [ 76.816486][ T5503] ? tomoyo_path_number_perm+0x5dd/0x770 [ 76.816503][ T5503] sock_do_ioctl+0x158/0x460 [ 76.816517][ T5503] ? __pfx_sock_do_ioctl+0x10/0x10 [ 76.816529][ T5503] ? __pfx_lock_release+0x10/0x10 [ 76.816544][ T5503] sock_ioctl+0x626/0x8e0 [ 76.816556][ T5503] ? __pfx_sock_ioctl+0x10/0x10 [ 76.816567][ T5503] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 76.816581][ T5503] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 76.816594][ T5503] ? __pfx_sock_ioctl+0x10/0x10 [ 76.816605][ T5503] __se_sys_ioctl+0xf5/0x170 [ 76.816616][ T5503] do_syscall_64+0xf3/0x230 [ 76.816628][ T5503] ? clear_bhb_loop+0x35/0x90 [ 76.816641][ T5503] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.816659][ T5503] RIP: 0033:0x7fafacad9d49 [ 76.816672][ T5503] Code: 5c c3 48 8d 44 24 08 48 89 54 24 e0 48 89 44 2= 4 c0 48 8d 44 24 d0 48 89 44 24 c8 b8 10 00 00 00 c7 44 24 b8 10 00 00 00 0= f 05 <41> 89 c0 3d 00 f0 ff ff 76 10 48 8b 15 ae 60 0d 00 f7 d8 41 83 c8 [ 76.816679][ T5503] RSP: 002b:00007fff965e9208 EFLAGS: 00000246 ORIG_RAX= : 0000000000000010 [ 76.816690][ T5503] RAX: ffffffffffffffda RBX: 00007fafaca0b6c0 RCX: 000= 07fafacad9d49 [ 76.816696][ T5503] RDX: 00007fff965f93f8 RSI: 0000000000008914 RDI: 000= 000000000000e [ 76.816702][ T5503] RBP: 00007fff966095b8 R08: 00007fff965f93b8 R09: 000= 07fff965f9368 [ 76.816709][ T5503] R10: 0000000000000000 R11: 0000000000000246 R12: 000= 0000000000000 [ 76.816714][ T5503] R13: 00007fff965f93f8 R14: 0000000000000028 R15: 000= 0000000008914 [ 76.816722][ T5503] [ 77.431447][ T5939] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 77.447065][ T5939] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 77.459986][ T5939] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 77.470884][ T5939] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 77.532921][ T5939] 8021q: adding VLAN 0 to HW filter on device bond0 [ 77.562340][ T5939] 8021q: adding VLAN 0 to HW filter on device team0 [ 77.580014][ T1055] bridge0: port 1(bridge_slave_0) entered blocking sta= te [ 77.587132][ T1055] bridge0: port 1(bridge_slave_0) entered forwarding s= tate [ 77.706703][ T1055] bridge0: port 2(bridge_slave_1) entered blocking sta= te [ 77.713863][ T1055] bridge0: port 2(bridge_slave_1) entered forwarding s= tate [ 77.881667][ T5939] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 77.938802][ T5939] veth0_vlan: entered promiscuous mode [ 77.949800][ T5939] veth1_vlan: entered promiscuous mode [ 77.990643][ T5939] veth0_macvtap: entered promiscuous mode [ 77.999872][ T5939] veth1_macvtap: entered promiscuous mode [ 78.015141][ T5939] batman_adv: batadv0: Interface activated: batadv_sla= ve_0 [ 78.032460][ T5939] batman_adv: batadv0: Interface activated: batadv_sla= ve_1 [ 78.046046][ T5939] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 78.055528][ T5939] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 78.066650][ T5939] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 78.076163][ T5939] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 78.106714][ T5939] ieee80211 phy5: Selected rate control algorithm 'min= strel_ht' [ 78.114482][ T5148] Bluetooth: hci0: command tx timeout [ 78.135848][ T13] wlan0: Created IBSS using preconfigured BSSID 50:50:= 50:50:50:50 [ 78.144458][ T13] wlan0: Creating new IBSS network, BSSID 50:50:50:50:= 50:50 [ 78.152395][ T5939] ieee80211 phy6: Selected rate control algorithm 'min= strel_ht' [ 78.176744][ T13] wlan1: Created IBSS using preconfigured BSSID 50:50:= 50:50:50:50 [ 78.186077][ T13] wlan1: Creating new IBSS network, BSSID 50:50:50:50:= 50:50 syzkaller build log: go env (err=3D) GO111MODULE=3D'auto' GOARCH=3D'amd64' GOBIN=3D'' GOCACHE=3D'/syzkaller/.cache/go-build' GOENV=3D'/syzkaller/.config/go/env' GOEXE=3D'' GOEXPERIMENT=3D'' GOFLAGS=3D'' GOHOSTARCH=3D'amd64' GOHOSTOS=3D'linux' GOINSECURE=3D'' 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'/syzkaller/jobs-2/linux/gopath/pkg/mod/golang.org/toolchain@v0.0.= 1-go1.23.6.linux-amd64' GOSUMDB=3D'sum.golang.org' GOTMPDIR=3D'' GOTOOLCHAIN=3D'auto' GOTOOLDIR=3D'/syzkaller/jobs-2/linux/gopath/pkg/mod/golang.org/toolchain@v0= .0.1-go1.23.6.linux-amd64/pkg/tool/linux_amd64' GOVCS=3D'' GOVERSION=3D'go1.23.6' GODEBUG=3D'' GOTELEMETRY=3D'local' GOTELEMETRYDIR=3D'/syzkaller/.config/go/telemetry' GCCGO=3D'gccgo' GOAMD64=3D'v1' AR=3D'ar' CC=3D'gcc' CXX=3D'g++' CGO_ENABLED=3D'1' GOMOD=3D'/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.= mod' GOWORK=3D'' CGO_CFLAGS=3D'-O2 -g' CGO_CPPFLAGS=3D'' CGO_CXXFLAGS=3D'-O2 -g' CGO_FFLAGS=3D'-O2 -g' CGO_LDFLAGS=3D'-O2 -g' PKG_CONFIG=3D'pkg-config' GOGCCFLAGS=3D'-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=3D0= -ffile-prefix-map=3D/tmp/go-build162451828=3D/tmp/go-build -gno-record-gcc= -switches' git status (err=3D) HEAD detached at e28266709d 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}}' ./sys/syz-sysgen | grep -q false || go install ./sy= s/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=3De28266709dd2a1d1452d4a5bbf271700e10335c6 -X '= github.com/google/syzkaller/prog.gitRevisionDate=3D20250313-150626'" -o ./b= in/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\"e28266709dd2a1d1452d4a5bbf271700e1= 0335c6\" /usr/bin/ld: /tmp/cc7kFs5f.o: in function `Connection::Connect(char const*,= char const*)': executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEP= KcS1_]+0x104): warning: Using 'gethostbyname' in statically linked applicat= ions requires at runtime the shared libraries from the glibc version used f= or linking Error text is too large and was truncated, full error text is at: https://syzkaller.appspot.com/x/error.txt?x=3D10d6483f980000 Tested on: commit: bfc6c67e net/smc: use the correct ndev to find pnetid .. git tree: net-next kernel config: https://syzkaller.appspot.com/x/.config?x=3Daeeec842a6bdc8b= 9 dashboard link: https://syzkaller.appspot.com/bug?extid=3D30de9d963fdd95d74= 5f8 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debia= n) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=3D10c6483f9800= 00