lost connection to test machine



syzkaller login: qemu-system-x86_64: ahci: PRDT length for NCQ command (0x0) is smaller than the requested size (0x400000)
Warning: Permanently added '[localhost]:34430' (ED25519) to the list of known hosts.
[  180.296671][ T1029] ata1.00: NCQ disabled due to excessive errors
[  180.299898][ T1029] ata1.00: exception Emask 0x0 SAct 0x100 SErr 0x0 action 0x6 frozen
[  180.304339][ T1029] ata1.00: failed command: WRITE FPDMA QUEUED
[  180.308725][ T1029] ata1.00: cmd 61/00:40:36:81:04/20:00:00:00:00/40 tag 8 ncq dma 4194304 ou
[  180.308725][ T1029]          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[  180.316205][ T1029] ata1.00: status: { DRDY }
[  180.318865][ T1029] ata1: hard resetting link
[  180.638345][ T1029] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[  180.642704][ T1029] ata1.00: configured for UDMA/100
[  180.645697][ T1029] ata1: EH complete
2026/07/25 11:49:37 parsed 1 programs
[  185.023933][ T5313] cgroup: Unknown subsys name 'net'
[  185.092131][ T5313] cgroup: Unknown subsys name 'cpuset'
[  185.100107][ T5313] cgroup: Unknown subsys name 'rlimit'
[  186.725528][ T5313] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
[  191.726708][ T5332] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[  191.737847][ T5332] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[  191.745460][ T5332] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[  191.751577][ T5332] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[  191.760379][ T5332] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[  193.498343][ T5329] 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.
[  193.797077][ T4652] Bluetooth: hci0: command tx timeout
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=<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-build4195571134=/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=<nil>)
HEAD detached at cd6fc0a301
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=cd6fc0a3018e5d793bdcca6530622493f5e88307 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20241018-123137'" "-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=\"cd6fc0a3018e5d793bdcca6530622493f5e88307\"
/usr/bin/ld: /tmp/ccfAC1Ek.o: in function `test_cover_filter()':
executor.cc:(.text+0x1691b): warning: the use of `tempnam' is dangerous, better use `mkstemp'
/usr/bin/ld: /tmp/ccfAC1Ek.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