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AJvYcCVdjh++8hiZ9l5mHwG4h8JDacaJ7qOQ1iE14zT9fqr5WdJ2AxKFelHrVf00iABOUIiNGPBMin0=@vger.kernel.org X-Gm-Message-State: AOJu0Yytqv/8n8XNenK2uNecdTMheRzxgKf4GZ9n58gOAwEwC92j+Mm+ CDXG0TmZyybglNeU5o7DcXYIR6l6IHbCI4GkjWenv61L3vy04j1obKVWerpsBUp+k1jrmMP+qeQ HGwKGUzWJVg7NT6ck9OldbRFur4ZBqdsFdtAEBNhC9lKdq4OofVEus8wM2w0= Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:f023:b0:679:a5a6:8331 with SMTP id 006d021491bc7-67b9bd6c368mr6747365eaf.64.1773049142109; Mon, 09 Mar 2026 02:39:02 -0700 (PDT) Date: Mon, 09 Mar 2026 02:39:02 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69ae9536.050a0220.310d8.001e.GAE@google.com> Subject: Re: [syzbot] [net?] KASAN: slab-use-after-free Read in sock_def_readable (2) From: syzbot To: jiayuan.chen@linux.dev, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hello, syzbot tried to test the proposed patch but the build/boot failed: failed to copy syz-execprog to VM: failed to run ["scp" "-P" "48817" "-F" "= /dev/null" "-o" "UserKnownHostsFile=3D/dev/null" "-o" "IdentitiesOnly=3Dyes= " "-o" "BatchMode=3Dyes" "-o" "StrictHostKeyChecking=3Dno" "-o" "ConnectTim= eout=3D10" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bi= n/linux_amd64/syz-execprog" "root@localhost:/syz-execprog"]: exit status 25= 5 syzkaller build log: go env (err=3D) AR=3D'ar' CC=3D'gcc' CGO_CFLAGS=3D'-O2 -g' CGO_CPPFLAGS=3D'' CGO_CXXFLAGS=3D'-O2 -g' CGO_ENABLED=3D'1' CGO_FFLAGS=3D'-O2 -g' CGO_LDFLAGS=3D'-O2 -g' CXX=3D'g++' GCCGO=3D'gccgo' GO111MODULE=3D'auto' GOAMD64=3D'v1' GOARCH=3D'amd64' GOAUTH=3D'netrc' GOBIN=3D'' GOCACHE=3D'/syzkaller/.cache/go-build' GOCACHEPROG=3D'' GODEBUG=3D'' GOENV=3D'/syzkaller/.config/go/env' GOEXE=3D'' GOEXPERIMENT=3D'' GOFIPS140=3D'off' GOFLAGS=3D'' GOGCCFLAGS=3D'-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=3D0= -ffile-prefix-map=3D/tmp/go-build3224921581=3D/tmp/go-build -gno-record-gc= c-switches' GOHOSTARCH=3D'amd64' GOHOSTOS=3D'linux' GOINSECURE=3D'' GOMOD=3D'/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/go.mo= d' GOMODCACHE=3D'/syzkaller/jobs/linux/gopath/pkg/mod' GONOPROXY=3D'' GONOSUMDB=3D'' GOOS=3D'linux' GOPATH=3D'/syzkaller/jobs/linux/gopath' GOPRIVATE=3D'' GOPROXY=3D'https://proxy.golang.org,direct' GOROOT=3D'/usr/local/go' GOSUMDB=3D'sum.golang.org' GOTELEMETRY=3D'local' GOTELEMETRYDIR=3D'/syzkaller/.config/go/telemetry' GOTMPDIR=3D'' GOTOOLCHAIN=3D'auto' GOTOOLDIR=3D'/usr/local/go/pkg/tool/linux_amd64' GOVCS=3D'' GOVERSION=3D'go1.26.0' GOWORK=3D'' PKG_CONFIG=3D'pkg-config' git status (err=3D) HEAD detached at 7c9658af8505 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/contribut= ing.md#using-syz-env go list -f '{{.Stale}}' -ldflags=3D"-s -w -X github.com/google/syzkaller/pr= og.GitRevision=3D7c9658af8505abccd5bf5890cc8a8e6d9826eaa0 -X github.com/goo= gle/syzkaller/prog.gitRevisionDate=3D20260223-092328" ./sys/syz-sysgen | g= rep -q false || go install -ldflags=3D"-s -w -X github.com/google/syzkaller= /prog.GitRevision=3D7c9658af8505abccd5bf5890cc8a8e6d9826eaa0 -X github.com/= google/syzkaller/prog.gitRevisionDate=3D20260223-092328" ./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/contribut= ing.md#using-syz-env bin/syz-sysgen touch .descriptions GOOS=3Dlinux GOARCH=3Damd64 go build -ldflags=3D"-s -w -X github.com/google= /syzkaller/prog.GitRevision=3D7c9658af8505abccd5bf5890cc8a8e6d9826eaa0 -X g= ithub.com/google/syzkaller/prog.gitRevisionDate=3D20260223-092328" -o ./bi= n/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 -Wfr= ame-larger-than=3D16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-forma= t-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -= static-pie -std=3Dc++17 -I. -Iexecutor/_include -DGOOS_linux=3D1 -DGOARCH= _amd64=3D1 \ -DHOSTGOOS_linux=3D1 -DGIT_REVISION=3D\"7c9658af8505abccd5bf5890cc8a8e6d98= 26eaa0\" /usr/bin/ld: /tmp/cc2JgryH.o: in function `Connection::Connect(char const*,= char const*)': executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEP= KcS1_]+0x386): warning: Using 'gethostbyname' in statically linked applicat= ions requires at runtime the shared libraries from the glibc version used f= or linking ./tools/check-syzos.sh 2>/dev/null Tested on: commit: 1f318b96 Linux 7.0-rc3 git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=3Dc5c49ee0942d1cd= b dashboard link: https://syzkaller.appspot.com/bug?extid=3Df50072212ab792c86= 925 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=3D1528375a5800= 00