lost connection to test machine syzkaller login: qemu-system-x86_64: ahci: PRDT length for NCQ command (0x0) is smaller than the requested size (0xbc000) Warning: Permanently added '[localhost]:2214' (ED25519) to the list of known hosts. 2026/07/28 05:16:29 ignoring optional flag "type"="qemu" 2026/07/28 05:16:29 parsed 1 programs [ 120.295102][ T5295] cgroup: Unknown subsys name 'net' [ 120.364365][ T5295] cgroup: Unknown subsys name 'cpuset' [ 120.371128][ T5295] cgroup: Unknown subsys name 'rlimit' [ 137.897386][ T1332] ieee802154 phy0 wpan0: encryption failed: -22 [ 137.900766][ T1332] ieee802154 phy1 wpan1: encryption failed: -22 [ 172.470155][ T1028] ata1.00: NCQ disabled due to excessive errors [ 172.473019][ T1028] ata1.00: exception Emask 0x0 SAct 0x4000 SErr 0x0 action 0x6 frozen [ 172.476608][ T1028] ata1.00: failed command: WRITE FPDMA QUEUED [ 172.479271][ T1028] ata1.00: cmd 61/e0:70:8e:5d:04/05:00:00:00:00/40 tag 14 ncq dma 770048 out [ 172.479271][ T1028] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout) [ 172.487247][ T1028] ata1.00: status: { DRDY } [ 172.490069][ T1028] ata1: hard resetting link [ 172.810913][ T1028] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300) [ 172.815126][ T1028] ata1.00: configured for UDMA/100 [ 172.817678][ T1028] ata1: EH complete [ 174.396812][ T5295] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 180.362874][ T5326] 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. [ 182.537459][ T5365] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 182.543937][ T5365] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 182.548005][ T5365] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 182.553947][ T5365] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 182.563294][ T5365] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 [ 184.605984][ T178] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 184.610682][ T5365] Bluetooth: hci0: command tx timeout [ 184.639745][ T178] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 185.245440][ T178] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 185.265095][ T178] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 186.189725][ T5356] bridge0: port 1(bridge_slave_0) entered blocking state [ 186.194613][ T5356] bridge0: port 1(bridge_slave_0) entered disabled state [ 186.203822][ T5356] bridge_slave_0: entered allmulticast mode [ 186.216025][ T5356] bridge_slave_0: entered promiscuous mode [ 186.238814][ T5356] bridge0: port 2(bridge_slave_1) entered blocking state [ 186.249705][ T5356] bridge0: port 2(bridge_slave_1) entered disabled state [ 186.259742][ T5356] bridge_slave_1: entered allmulticast mode [ 186.272787][ T5356] bridge_slave_1: entered promiscuous mode [ 186.372008][ T5356] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 186.388677][ T5356] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 186.434286][ T5356] team0: Port device team_slave_0 added [ 186.451498][ T5356] team0: Port device team_slave_1 added [ 186.475764][ T5356] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 186.490235][ T5356] 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. [ 186.510094][ T5356] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 186.520303][ T5356] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 186.523612][ T5356] 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. [ 186.550235][ T5356] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 186.632268][ T5356] hsr_slave_0: entered promiscuous mode [ 186.641275][ T5356] hsr_slave_1: entered promiscuous mode [ 186.692212][ T5365] Bluetooth: hci0: command tx timeout [ 186.986830][ T5356] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 187.044544][ T5356] 8021q: adding VLAN 0 to HW filter on device netdevsim0 [ 187.058889][ T5356] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 187.076838][ T5356] 8021q: adding VLAN 0 to HW filter on device netdevsim1 [ 187.092010][ T5356] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 187.113854][ T5356] 8021q: adding VLAN 0 to HW filter on device netdevsim2 [ 187.119195][ T5356] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 187.133645][ T5356] 8021q: adding VLAN 0 to HW filter on device netdevsim3 [ 187.351198][ T5356] 8021q: adding VLAN 0 to HW filter on device bond0 [ 187.396227][ T5356] 8021q: adding VLAN 0 to HW filter on device team0 [ 187.405071][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 187.409081][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 187.426584][ T12] bridge0: port 2(bridge_slave_1) entered blocking state [ 187.429636][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state [ 187.868271][ T5356] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 187.923491][ T5356] veth0_vlan: entered promiscuous mode [ 187.938015][ T5356] veth1_vlan: entered promiscuous mode [ 188.006932][ T5356] veth0_macvtap: entered promiscuous mode [ 188.023457][ T5356] veth1_macvtap: entered promiscuous mode [ 188.056342][ T5356] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 188.076950][ T5356] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 188.106771][ T178] netdevsim netdevsim2 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 188.120993][ T178] netdevsim netdevsim2 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 188.128101][ T178] netdevsim netdevsim2 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 188.140435][ T12] netdevsim netdevsim2 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 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-build146716324=/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 c673ca06b2 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=c673ca06b23cea94091ab496ef62c3513e434585 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240916-123108'" "-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=\"c673ca06b23cea94091ab496ef62c3513e434585\" /usr/bin/ld: /tmp/ccKjsQWg.o: in function `test_cover_filter()': executor.cc:(.text+0x167fb): warning: the use of `tempnam' is dangerous, better use `mkstemp' /usr/bin/ld: /tmp/ccKjsQWg.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