Re: [syzbot] [nilfs?] WARNING in nilfs_btree_mark

[syzbot]

Hello,

syzbot tried to test the proposed patch but the build/boot failed:

failed to copy syz-executor to VM: failed to run ["scp" "-P" "3599" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-executor" "root@localhost:/syz-executor"]: exit status 1



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-build2752091841=/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 c88105488a56
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: downloading golang.org/x/sys v0.41.0
go: downloading github.com/prometheus/common v0.67.5
go: downloading google.golang.org/protobuf v1.36.11
go: downloading github.com/prometheus/procfs v0.20.1
go list -f '{{.Stale}}' -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=c88105488a5620be13a34f467b1b811950c61bdd -X github.com/google/syzkaller/prog.gitRevisionDate=20260317-161255"  ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=c88105488a5620be13a34f467b1b811950c61bdd -X github.com/google/syzkaller/prog.gitRevisionDate=20260317-161255"  ./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=c88105488a5620be13a34f467b1b811950c61bdd -X github.com/google/syzkaller/prog.gitRevisionDate=20260317-161255"  -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=\"c88105488a5620be13a34f467b1b811950c61bdd\"
go: downloading github.com/google/flatbuffers v25.12.19+incompatible
go: downloading golang.org/x/sync v0.19.0
go: downloading golang.org/x/exp v0.0.0-20260218203240-3dfff04db8fa
go: downloading google.golang.org/api v0.269.0
go: downloading cloud.google.com/go/spanner v1.88.0
go: downloading cloud.google.com/go/bigquery v1.74.0
go: downloading cloud.google.com/go/storage v1.60.0
go: downloading cloud.google.com/go/auth v0.18.2
go: downloading google.golang.org/grpc v1.79.1
go: downloading google.golang.org/genproto v0.0.0-20260226221140-a57be14db171
go: downloading go.opentelemetry.io/otel v1.40.0
go: downloading go.opentelemetry.io/otel/sdk/metric v1.40.0
go: downloading go.opentelemetry.io/otel/sdk v1.40.0
go: downloading github.com/googleapis/gax-go/v2 v2.17.0
go: downloading github.com/GoogleCloudPlatform/opentelemetry-operations-go/exporter/metric v0.55.0
go: downloading google.golang.org/genproto/googleapis/api v0.0.0-20260226221140-a57be14db171
go: downloading google.golang.org/genproto/googleapis/rpc v0.0.0-20260226221140-a57be14db171
go: downloading go.opentelemetry.io/otel/trace v1.40.0
go: downloading go.opentelemetry.io/contrib/detectors/gcp v1.40.0
go: downloading github.com/GoogleCloudPlatform/grpc-gcp-go/grpcgcp v1.6.0
go: downloading go.opentelemetry.io/otel/metric v1.40.0
go: downloading github.com/GoogleCloudPlatform/opentelemetry-operations-go/internal/resourcemapping v0.55.0
go: downloading golang.org/x/oauth2 v0.35.0
go: downloading github.com/GoogleCloudPlatform/opentelemetry-operations-go/detectors/gcp v1.31.0
go: downloading github.com/klauspost/compress v1.18.4
go: downloading github.com/zeebo/xxh3 v1.1.0
go: downloading github.com/pierrec/lz4/v4 v4.1.25
go: downloading golang.org/x/net v0.51.0
go: downloading github.com/cncf/xds/go v0.0.0-20260202195803-dba9d589def2
go: downloading github.com/envoyproxy/go-control-plane/envoy v1.37.0
go: downloading cel.dev/expr v0.25.1
go: downloading github.com/envoyproxy/protoc-gen-validate v1.3.3
go: downloading golang.org/x/text v0.34.0
go: downloading github.com/googleapis/enterprise-certificate-proxy v0.3.12
go: downloading go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.65.0
go: downloading go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.65.0
go: downloading golang.org/x/crypto v0.48.0
/usr/bin/ld: /tmp/ccEER4Ht.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
./tools/check-syzos.sh 2>/dev/null



Tested on:

commit:         8a30aeb0 Merge tag 'nfsd-7.0-2' of git://git.kernel.or..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=d46eab0cfd31c214
dashboard link: https://syzkaller.appspot.com/bug?extid=98a040252119df0506f8
compiler:       Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
patch:          https://syzkaller.appspot.com/x/patch.diff?x=17e5a06a580000