lost connection to test machine syzkaller login: qemu-system-x86_64: ahci: PRDT length for NCQ command (0x0) is smaller than the requested size (0x2f9000) Warning: Permanently added '[localhost]:22436' (ED25519) to the list of known hosts. 2026/08/05 10:47:17 parsed 1 programs [ 83.938747][ T5293] cgroup: Unknown subsys name 'net' [ 83.998705][ T5293] cgroup: Unknown subsys name 'cpuset' [ 84.007146][ T5293] cgroup: Unknown subsys name 'rlimit' [ 91.965956][ T9] cfg80211: failed to load regulatory.db [ 105.421497][ T1029] ata1.00: exception Emask 0x0 SAct 0x100 SErr 0x0 action 0x6 frozen [ 105.425235][ T1029] ata1.00: failed command: WRITE FPDMA QUEUED [ 105.428137][ T1029] ata1.00: cmd 61/c8:40:6e:69:05/17:00:00:00:00/40 tag 8 ncq dma 3117056 ou [ 105.428137][ T1029] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout) [ 105.437182][ T1029] ata1.00: status: { DRDY } [ 105.439627][ T1029] ata1: hard resetting link [ 105.763734][ T1029] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300) [ 105.768919][ T1029] ata1.00: configured for UDMA/100 [ 105.772664][ T1029] ata1: EH complete qemu-system-x86_64: ahci: PRDT length for NCQ command (0x0) is smaller than the requested size (0x400000) [ 105.802913][ T1029] ata1.00: Read log 0x10 page 0x00 failed, Emask 0x1 [ 105.816196][ T1029] ata1: failed to read log page 10h (errno=-5) [ 105.831447][ T1029] ata1.00: exception Emask 0x1 SAct 0x7c0000 SErr 0x0 action 0x0 [ 105.836353][ T1029] ata1.00: irq_stat 0x41000000 [ 105.842471][ T1029] ata1.00: failed command: WRITE FPDMA QUEUED [ 105.851236][ T1029] ata1.00: cmd 61/c8:90:6e:69:05/17:00:00:00:00/40 tag 18 ncq dma 3117056 ou [ 105.851236][ T1029] res 50/00:00:00:00:00/00:00:00:00:00/00 Emask 0x1 (device error) [ 105.865247][ T1029] ata1.00: status: { DRDY } [ 105.867684][ T1029] ata1.00: failed command: WRITE FPDMA QUEUED [ 105.870711][ T1029] ata1.00: cmd 61/08:98:ce:08:00/00:00:00:00:00/40 tag 19 ncq dma 4096 out [ 105.870711][ T1029] res 50/00:00:00:00:00/00:00:00:00:00/00 Emask 0x1 (device error) [ 105.879493][ T1029] ata1.00: status: { DRDY } [ 105.882904][ T1029] ata1.00: failed command: WRITE FPDMA QUEUED [ 105.885984][ T1029] ata1.00: cmd 61/08:a0:4e:21:04/00:00:00:00:00/40 tag 20 ncq dma 4096 out [ 105.885984][ T1029] res 50/00:00:00:00:00/00:00:00:00:00/00 Emask 0x1 (device error) [ 105.894191][ T1029] ata1.00: status: { DRDY } [ 105.896729][ T1029] ata1.00: failed command: WRITE FPDMA QUEUED [ 105.899676][ T1029] ata1.00: cmd 61/00:a8:36:81:05/20:00:00:00:00/40 tag 21 ncq dma 4194304 ou [ 105.899676][ T1029] res 50/00:00:00:00:00/00:00:00:00:00/00 Emask 0x1 (device error) [ 105.908223][ T1029] ata1.00: status: { DRDY } [ 105.910525][ T1029] ata1.00: failed command: WRITE FPDMA QUEUED [ 105.913704][ T1029] ata1.00: cmd 61/18:b0:36:a1:05/0d:00:00:00:00/40 tag 22 ncq dma 1716224 ou [ 105.913704][ T1029] res 50/00:00:00:00:00/00:00:00:00:00/00 Emask 0x1 (device error) [ 105.922130][ T1029] ata1.00: status: { DRDY } [ 105.925476][ T1029] ata1.00: configured for UDMA/100 [ 105.928399][ T1029] ata1: EH complete qemu-system-x86_64: ahci: PRDT length for NCQ command (0x0) is smaller than the requested size (0x400000) qemu-system-x86_64: ahci: PRDT length for NCQ command (0x0) is smaller than the requested size (0x1ea000) [ 136.141481][ T1029] ata1.00: NCQ disabled due to excessive errors [ 136.144477][ T1029] ata1.00: exception Emask 0x0 SAct 0x820 SErr 0x0 action 0x6 frozen [ 136.148161][ T1029] ata1.00: failed command: WRITE FPDMA QUEUED [ 136.153166][ T1029] ata1.00: cmd 61/00:28:36:81:05/20:00:00:00:00/40 tag 5 ncq dma 4194304 ou [ 136.153166][ T1029] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout) [ 136.162776][ T1029] ata1.00: status: { DRDY } [ 136.165290][ T1029] ata1.00: failed command: WRITE FPDMA QUEUED [ 136.168308][ T1029] ata1.00: cmd 61/50:58:26:cf:05/0f:00:00:00:00/40 tag 11 ncq dma 2007040 ou [ 136.168308][ T1029] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout) [ 136.176520][ T1029] ata1.00: status: { DRDY } [ 136.179362][ T1029] ata1: hard resetting link [ 136.503423][ T1029] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300) [ 136.507805][ T1029] ata1.00: configured for UDMA/100 [ 136.510901][ T1029] ata1: EH complete [ 138.052721][ T1332] ieee802154 phy0 wpan0: encryption failed: -22 [ 138.055950][ T1332] ieee802154 phy1 wpan1: encryption failed: -22 [ 138.826535][ T5293] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 144.114517][ T5334] bridge0: port 1(bridge_slave_0) entered blocking state [ 144.119386][ T5334] bridge0: port 1(bridge_slave_0) entered disabled state [ 144.131885][ T5334] bridge_slave_0: entered allmulticast mode [ 144.142706][ T5334] bridge_slave_0: entered promiscuous mode [ 144.159486][ T5334] bridge0: port 2(bridge_slave_1) entered blocking state [ 144.171897][ T5334] bridge0: port 2(bridge_slave_1) entered disabled state [ 144.175306][ T5334] bridge_slave_1: entered allmulticast mode [ 144.185960][ T5334] bridge_slave_1: entered promiscuous mode [ 144.268094][ T5334] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 144.285025][ T5334] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 144.312112][ T5334] team0: Port device team_slave_0 added [ 144.317667][ T5334] team0: Port device team_slave_1 added [ 144.342839][ T5334] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 144.345996][ T5334] 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. [ 144.359149][ T5334] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 144.368147][ T5334] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 144.372210][ T5334] 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. [ 144.385001][ T5334] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 144.429544][ T5334] hsr_slave_0: entered promiscuous mode [ 144.434046][ T5334] hsr_slave_1: entered promiscuous mode [ 144.644406][ T5334] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 144.658524][ T5334] 8021q: adding VLAN 0 to HW filter on device netdevsim0 [ 144.664506][ T5334] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 144.680372][ T5334] 8021q: adding VLAN 0 to HW filter on device netdevsim1 [ 144.688034][ T5334] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 144.696660][ T5334] 8021q: adding VLAN 0 to HW filter on device netdevsim2 [ 144.701745][ T5334] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 144.709452][ T5334] 8021q: adding VLAN 0 to HW filter on device netdevsim3 [ 144.746113][ T5334] bridge0: port 2(bridge_slave_1) entered blocking state [ 144.750088][ T5334] bridge0: port 2(bridge_slave_1) entered forwarding state [ 144.754881][ T5334] bridge0: port 1(bridge_slave_0) entered blocking state [ 144.758452][ T5334] bridge0: port 1(bridge_slave_0) entered forwarding state [ 144.849122][ T175] bridge0: port 1(bridge_slave_0) entered disabled state [ 144.864746][ T175] bridge0: port 2(bridge_slave_1) entered disabled state [ 144.915472][ T5334] 8021q: adding VLAN 0 to HW filter on device bond0 [ 144.944407][ T5334] 8021q: adding VLAN 0 to HW filter on device team0 [ 144.957323][ T41] bridge0: port 1(bridge_slave_0) entered blocking state [ 144.960785][ T41] bridge0: port 1(bridge_slave_0) entered forwarding state [ 144.978016][ T175] bridge0: port 2(bridge_slave_1) entered blocking state [ 144.981772][ T175] bridge0: port 2(bridge_slave_1) entered forwarding state [ 146.015359][ T5334] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 146.118869][ T5334] veth0_vlan: entered promiscuous mode [ 146.154928][ T5334] veth1_vlan: entered promiscuous mode [ 146.247695][ T5334] veth0_macvtap: entered promiscuous mode [ 146.265648][ T5334] veth1_macvtap: entered promiscuous mode [ 146.300348][ T5334] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 146.325851][ T5334] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 146.411680][ T41] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 146.491927][ T1107] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 146.517052][ T1107] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 146.538285][ T1107] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 146.640761][ T5334] soft_limit_in_bytes is deprecated and will be removed. Please report your usecase to linux-mm@kvack.org if you depend on this functionality. [ 147.008384][ T1107] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 147.444424][ T44] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 147.450797][ T44] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 147.455207][ T44] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 147.459798][ T44] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 147.464696][ T44] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 [ 147.543411][ T1107] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 147.878929][ T1107] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 148.061628][ T1107] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 148.377993][ T1107] bridge_slave_1: left allmulticast mode [ 148.382164][ T1107] bridge_slave_1: left promiscuous mode [ 148.386913][ T1107] bridge0: port 2(bridge_slave_1) entered disabled state [ 148.397177][ T1107] bridge_slave_0: left allmulticast mode [ 148.399769][ T1107] bridge_slave_0: left promiscuous mode [ 148.404182][ T1107] bridge0: port 1(bridge_slave_0) entered disabled state [ 148.594715][ T1107] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 148.624421][ T1107] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 148.634451][ T1107] bond0 (unregistering): Released all slaves [ 148.785352][ T1107] hsr_slave_0: left promiscuous mode [ 148.790124][ T1107] hsr_slave_1: left promiscuous mode [ 148.799692][ T1107] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 148.813916][ T1107] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 148.820538][ T1107] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 148.831756][ T1107] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 148.872918][ T1107] veth1_macvtap: left promiscuous mode [ 148.875842][ T1107] veth0_macvtap: left promiscuous mode [ 148.878791][ T1107] veth1_vlan: left promiscuous mode [ 148.898600][ T1107] veth0_vlan: left promiscuous mode [ 149.298002][ T1107] team0 (unregistering): Port device team_slave_1 removed [ 149.318513][ T1107] team0 (unregistering): Port device team_slave_0 removed [ 149.449701][ T4999] 8021q: adding VLAN 0 to HW filter on device eth2 [ 150.303013][ T4999] 8021q: adding VLAN 0 to HW filter on device eth3 [ 151.240561][ T4999] 8021q: adding VLAN 0 to HW filter on device eth4 [ 151.434677][ T13] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 151.438724][ T13] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 151.542228][ T41] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 151.555223][ T41] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 151.965863][ T4999] 8021q: adding VLAN 0 to HW filter on device eth5 2026/08/05 10:48:33 executed programs: 0 [ 156.434749][ T44] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 156.442632][ T44] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 156.448274][ T44] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 156.455003][ T44] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 156.459508][ T44] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 [ 157.149413][ T5462] bridge0: port 1(bridge_slave_0) entered blocking state [ 157.161734][ T5462] bridge0: port 1(bridge_slave_0) entered disabled state [ 157.165696][ T5462] bridge_slave_0: entered allmulticast mode [ 157.174413][ T5462] bridge_slave_0: entered promiscuous mode [ 157.186585][ T5462] bridge0: port 2(bridge_slave_1) entered blocking state [ 157.201464][ T5462] bridge0: port 2(bridge_slave_1) entered disabled state [ 157.205484][ T5462] bridge_slave_1: entered allmulticast mode [ 157.214369][ T5462] bridge_slave_1: entered promiscuous mode [ 157.306428][ T5462] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link qemu-system-x86_64: hw/ide/core.c:934: ide_dma_cb: Assertion `prep_size >= 0 && prep_size <= n * 512' failed. Connection to localhost closed by remote host. syzkaller build log: go env (err=) 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-build1196000661=/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='go1.26.0' GOWORK='' PKG_CONFIG='pkg-config' git status (err=) HEAD detached at 66aeb999f3 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}}' ./sys/syz-sysgen | grep -q false || go install ./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 go fmt ./sys/... >/dev/null touch .descriptions GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=66aeb999f37ab41e95f08d1da821200313f71342 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20241028-182907'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -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 -fpermissive -w -DGOOS_linux=1 -DGOARCH_amd64=1 \ -DHOSTGOOS_linux=1 -DGIT_REVISION=\"66aeb999f37ab41e95f08d1da821200313f71342\" /usr/bin/ld: /tmp/ccq7V5JG.o: in function `test_cover_filter()': executor.cc:(.text+0x1693b): warning: the use of `tempnam' is dangerous, better use `mkstemp' /usr/bin/ld: /tmp/ccq7V5JG.o: in function `Connection::Connect(char const*, char const*)': executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x386): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking