Re: [syzbot] [kvmarm?] [kvm?] WARNING: locking bug in vgic_put_irq

[syzbot <syzbot+cef594105ac7e60c6d93@syzkaller.appspotmail.com>]

Hello,

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

failed to copy binary to VM: failed to run ["scp" "-P" "31225" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "/tmp/syz-executor3241787550" "root@localhost:/syz-executor3241787550"]: exit status 255
Connection timed out during banner exchange
Connection to 127.0.0.1 port 31225 timed out
scp: Connection closed




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'
GOARCH='arm64'
GOARM64='v8.0'
GOAUTH='netrc'
GOBIN=''
GOCACHE='/syzkaller/.cache/go-build'
GOCACHEPROG=''
GODEBUG=''
GOENV='/syzkaller/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFIPS140='off'
GOFLAGS=''
GOGCCFLAGS='-fPIC -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build3554905218=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='arm64'
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_arm64'
GOVCS=''
GOVERSION='go1.24.4'
GOWORK=''
PKG_CONFIG='pkg-config'

git status (err=<nil>)
HEAD detached at bf27483f96
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 v0.34.0
go: downloading github.com/prometheus/client_golang v1.23.0
go: downloading github.com/prometheus/common v0.65.0
go: downloading github.com/prometheus/client_model v0.6.2
go: downloading github.com/prometheus/procfs v0.16.1
go list -f '{{.Stale}}' -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=bf27483f963359281b2d9b6d6efd36289f82e282 -X github.com/google/syzkaller/prog.gitRevisionDate=20250821-140520"  ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=bf27483f963359281b2d9b6d6efd36289f82e282 -X github.com/google/syzkaller/prog.gitRevisionDate=20250821-140520"  ./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=arm64 go build -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=bf27483f963359281b2d9b6d6efd36289f82e282 -X github.com/google/syzkaller/prog.gitRevisionDate=20250821-140520"  -o ./bin/linux_arm64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
mkdir -p ./bin/linux_arm64
g++ -o ./bin/linux_arm64/syz-executor executor/executor.cc \
	-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_arm64=1 \
	-DHOSTGOOS_linux=1 -DGIT_REVISION=\"bf27483f963359281b2d9b6d6efd36289f82e282\"
go: downloading golang.org/x/sync v0.16.0
go: downloading golang.org/x/exp v0.0.0-20250711185948-6ae5c78190dc
go: downloading cloud.google.com/go/spanner v1.82.0
go: downloading cloud.google.com/go/bigquery v1.69.0
go: downloading github.com/sergi/go-diff v1.4.0
go: downloading google.golang.org/genproto v0.0.0-20250603155806-513f23925822
go: downloading google.golang.org/genproto/googleapis/api v0.0.0-20250603155806-513f23925822
go: downloading github.com/GoogleCloudPlatform/opentelemetry-operations-go/exporter/metric v0.52.0
go: downloading github.com/GoogleCloudPlatform/opentelemetry-operations-go/detectors/gcp v1.28.0
go: downloading github.com/GoogleCloudPlatform/opentelemetry-operations-go/internal/resourcemapping v0.52.0
go: downloading github.com/golang/groupcache v0.0.0-20241129210726-2c02b8208cf8
go: downloading github.com/go-logr/logr v1.4.3
go: downloading github.com/goccy/go-json v0.10.5
go: downloading golang.org/x/net v0.42.0
go: downloading github.com/cncf/xds/go v0.0.0-20250501225837-2ac532fd4443
go: downloading cel.dev/expr v0.24.0
go: downloading github.com/go-jose/go-jose/v4 v4.1.0
go: downloading golang.org/x/text v0.27.0
go: downloading golang.org/x/crypto v0.40.0
/usr/bin/ld: /tmp/ccHdKQ2T.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0xd8): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking



Tested on:

commit:         2d047827 KVM: arm64: vgic: fix incorrect spinlock API ..
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git fixes
kernel config:  https://syzkaller.appspot.com/x/.config?x=a348a32a552b6434
dashboard link: https://syzkaller.appspot.com/bug?extid=cef594105ac7e60c6d93
compiler:       Debian clang version 20.1.8 (++20250708123704+0de59a293f7a-1~exp1~20250708003721.134), Debian LLD 20.1.8
userspace arch: arm64

Note: no patches were applied.