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AHgh+RqORpcaeNtKXceJcYs7On9v5Twz/hiZiqLCSrhHuwboGWvXX4vim93Ny+kWJ5WJjwFtyvU1jaE6OjZIlFg=@vger.kernel.org X-Gm-Message-State: AOJu0Yyij3YoRkSd0OGBZnDJ37YBNmsakBkXhsp/oTFhrSqC7dBescVG Y6Oim+B9RXf2Chk++hAaR4cs1GrS9XaZ8133HOSvf9XRsSPh71J1cnayhk2mboE0obdJUfj0G/E In8KnQnQC5MDmJ5mwkrFlBmpAhueTLkOhOtJikxd1aeSD24E7FsznYPwycug= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:1394:b0:495:f0ac:8297 with SMTP id 5614622812f47-4ab38717e59mr4108653b6e.33.1784890203732; Fri, 24 Jul 2026 03:50:03 -0700 (PDT) Date: Fri, 24 Jul 2026 03:50:03 -0700 In-Reply-To: <20260724102620.16266-1-jeffinphilip14@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a63435b.dde6c935.cf6c8.001a.GAE@google.com> Subject: Re: [syzbot] [fuse?] INFO: task hung in fuse_chan_send From: syzbot To: jeffinphilip14@gmail.com, linux-kernel@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: lost connection to test machine syzkaller login: qemu-system-x86_64: ahci: PRDT length for NCQ command (0x0= ) is smaller than the requested size (0xba000) [ 110.222965][ T1028] ata1.00: Read log 0x10 page 0x00 failed, Emask 0x1 [ 110.225835][ T1028] ata1: failed to read log page 10h (errno=3D-5) [ 110.228573][ T1028] ata1.00: exception Emask 0x1 SAct 0xc000 SErr 0x0 ac= tion 0x0 [ 110.243158][ T1028] ata1.00: irq_stat 0x40000000 [ 110.247818][ T1028] ata1.00: failed command: WRITE FPDMA QUEUED [ 110.255077][ T1028] ata1.00: cmd 61/d0:70:36:41:04/05:00:00:00:00/40 tag= 14 ncq dma 761856 out [ 110.255077][ T1028] res 50/00:00:00:00:00/00:00:00:00:00/00 Ema= sk 0x1 (device error) [ 110.273090][ T1028] ata1.00: status: { DRDY } [ 110.280653][ T1028] ata1.00: failed command: WRITE FPDMA QUEUED [ 110.291935][ T1028] ata1.00: cmd 61/e8:78:06:47:04/02:00:00:00:00/40 tag= 15 ncq dma 380928 out [ 110.291935][ T1028] res 50/00:00:00:00:00/00:00:00:00:00/00 Ema= sk 0x1 (device error) [ 110.317045][ T1028] ata1.00: status: { DRDY } [ 110.325648][ T1028] ata1.00: configured for UDMA/100 [ 110.332172][ T1028] ata1: EH complete qemu-system-x86_64: ahci: PRDT length for NCQ command (0x0) is smaller than= the requested size (0x400000) qemu-system-x86_64: ahci: PRDT length for NCQ command (0x0) is smaller than= the requested size (0x400000) Warning: Permanently added '[localhost]:55333' (ED25519) to the list of kno= wn hosts. 2026/07/24 10:48:22 parsed 1 programs 2026/07/24 10:48:22 serving rpc on tcp://33671 [ 120.451810][ T5301] cgroup: Unknown subsys name 'net' [ 120.509463][ T5301] cgroup: Unknown subsys name 'cpuset' [ 120.516681][ T5301] cgroup: Unknown subsys name 'rlimit' [ 137.844799][ T1332] ieee802154 phy0 wpan0: encryption failed: -22 [ 137.847636][ T1332] ieee802154 phy1 wpan1: encryption failed: -22 [ 178.182256][ T1028] ata1.00: NCQ disabled due to excessive errors [ 178.184972][ T1028] ata1.00: exception Emask 0x0 SAct 0x120 SErr 0x0 act= ion 0x6 frozen [ 178.188645][ T1028] ata1.00: failed command: WRITE FPDMA QUEUED [ 178.191451][ T1028] ata1.00: cmd 61/00:28:36:01:05/20:00:00:00:00/40 tag= 5 ncq dma 4194304 ou [ 178.191451][ T1028] res 40/00:00:00:00:00/00:00:00:00:00/00 Ema= sk 0x4 (timeout) [ 178.199514][ T1028] ata1.00: status: { DRDY } [ 178.202584][ T1028] ata1.00: failed command: WRITE FPDMA QUEUED [ 178.205241][ T1028] ata1.00: cmd 61/00:40:36:61:05/20:00:00:00:00/40 tag= 8 ncq dma 4194304 ou [ 178.205241][ T1028] res 40/00:00:00:00:00/00:00:00:00:00/00 Ema= sk 0x4 (timeout) [ 178.213219][ T1028] ata1.00: status: { DRDY } [ 178.215375][ T1028] ata1: hard resetting link [ 178.533841][ T1028] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 30= 0) [ 178.537972][ T1028] ata1.00: configured for UDMA/100 [ 178.540726][ T1028] ata1: EH complete qemu-system-x86_64: hw/ide/core.c:934: ide_dma_cb: Assertion `prep_size >= =3D 0 && prep_size <=3D n * 512' failed. Connection to localhost closed by remote host. 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-build793079094=3D/tmp/go-build -gno-record-gcc= -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 fb92f11c47 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=3Dfb92f11c4789d9647a75c09c983dbee5c8488ccf -X github.com/goo= gle/syzkaller/prog.gitRevisionDate=3D20260626-134956" ./sys/syz-sysgen | g= rep -q false || go install -ldflags=3D"-s -w -X github.com/google/syzkaller= /prog.GitRevision=3Dfb92f11c4789d9647a75c09c983dbee5c8488ccf -X github.com/= google/syzkaller/prog.gitRevisionDate=3D20260626-134956" ./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=3Dfb92f11c4789d9647a75c09c983dbee5c8488ccf -X g= ithub.com/google/syzkaller/prog.gitRevisionDate=3D20260626-134956" -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\"fb92f11c4789d9647a75c09c983dbee5c8= 488ccf\" /usr/bin/ld: /tmp/ccLzPndg.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: 48a5a7ab Merge tag 'v7.2-rc4-smb3-client-fixes' of git.. git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=3D3c3d59be33cf7e9= a dashboard link: https://syzkaller.appspot.com/bug?extid=3Da531d1b1fb0fa2a75= a73 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-= 1~exp1~20260613092250.77), Debian LLD 22.1.8 patch: https://syzkaller.appspot.com/x/patch.diff?x=3D137f59c15800= 00