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Fri, 17 Apr 2026 03:28:03 -0700 (PDT) Date: Fri, 17 Apr 2026 03:28:03 -0700 In-Reply-To: <20260417101233.2491241-1-tristmd@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69e20b33.a00a0220.1cdc.0011.GAE@google.com> Subject: Re: [syzbot] [gfs2?] WARNING in rgblk_free (2) From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tristmd@gmail.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 (0xc0000) qemu-system-x86_64: ahci: PRDT length for NCQ command (0x0) is smaller than= the requested size (0x400000) [ 89.858685][ T1014] ata1.00: Read log 0x10 page 0x00 failed, Emask 0x1 [ 89.861727][ T1014] ata1: failed to read log page 10h (errno=3D-5) [ 89.864528][ T1014] ata1.00: exception Emask 0x1 SAct 0x40001800 SErr 0x= 0 action 0x0 [ 89.882551][ T1014] ata1.00: irq_stat 0x41000000 [ 89.890503][ T1014] ata1.00: failed command: WRITE FPDMA QUEUED [ 89.893877][ T1014] ata1.00: cmd 61/00:58:36:a1:04/20:00:00:00:00/40 tag= 11 ncq dma 4194304 ou [ 89.893877][ T1014] res 50/04:00:00:00:00/00:00:00:00:00/00 Ema= sk 0x1 (device error) [ 89.915460][ T1014] ata1.00: status: { DRDY } [ 89.920297][ T1014] ata1.00: error: { ABRT } [ 89.923386][ T1014] ata1.00: failed command: WRITE FPDMA QUEUED [ 89.931869][ T1014] ata1.00: cmd 61/00:60:36:c1:04/20:00:00:00:00/40 tag= 12 ncq dma 4194304 ou [ 89.931869][ T1014] res 50/04:00:00:00:00/00:00:00:00:00/00 Ema= sk 0x1 (device error) [ 89.950869][ T1014] ata1.00: status: { DRDY } [ 89.956448][ T1014] ata1.00: error: { ABRT } [ 89.958509][ T1014] ata1.00: failed command: WRITE FPDMA QUEUED [ 89.961206][ T1014] ata1.00: cmd 61/00:f0:6e:4d:04/06:00:00:00:00/40 tag= 30 ncq dma 786432 out [ 89.961206][ T1014] res 50/04:00:00:00:00/00:00:00:00:00/00 Ema= sk 0x1 (device error) [ 89.982304][ T1014] ata1.00: status: { DRDY } [ 89.991443][ T1014] ata1.00: error: { ABRT } [ 90.000906][ T1014] ata1.00: configured for UDMA/100 [ 90.010275][ T1014] ata1: EH complete qemu-system-x86_64: ahci: PRDT length for NCQ command (0x0) is smaller than= the requested size (0x400000) Warning: Permanently added '[localhost]:64818' (ED25519) to the list of kno= wn hosts. 2026/04/17 10:25:55 parsed 1 programs [ 96.907509][ T9] cfg80211: failed to load regulatory.db [ 98.569240][ T5315] cgroup: Unknown subsys name 'net' [ 98.640395][ T5315] cgroup: Unknown subsys name 'cpuset' [ 98.647229][ T5315] cgroup: Unknown subsys name 'rlimit' [ 142.980103][ T1317] ieee802154 phy0 wpan0: encryption failed: -22 [ 142.983476][ T1317] ieee802154 phy1 wpan1: encryption failed: -22 [ 157.075680][ T1014] ata1.00: exception Emask 0x0 SAct 0x800 SErr 0x0 act= ion 0x6 frozen [ 157.079696][ T1014] ata1.00: failed command: WRITE FPDMA QUEUED [ 157.082402][ T1014] ata1.00: cmd 61/00:58:36:61:05/20:00:00:00:00/40 tag= 11 ncq dma 4194304 ou [ 157.082402][ T1014] res 40/00:00:00:00:00/00:00:00:00:00/00 Ema= sk 0x4 (timeout) [ 157.090593][ T1014] ata1.00: status: { DRDY } [ 157.092972][ T1014] ata1: hard resetting link [ 157.416392][ T1014] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 30= 0) [ 157.420997][ T1014] ata1.00: configured for UDMA/100 [ 157.424015][ T1014] ata1: EH complete qemu-system-x86_64: ahci: PRDT length for NCQ command (0x0) is smaller than= the requested size (0x400000) [ 157.446324][ T1014] ata1.00: Read log 0x10 page 0x00 failed, Emask 0x1 [ 157.449310][ T1014] ata1: failed to read log page 10h (errno=3D-5) [ 157.451924][ T1014] ata1.00: NCQ disabled due to excessive errors [ 157.454677][ T1014] ata1.00: exception Emask 0x1 SAct 0x200000 SErr 0x0 = action 0x0 [ 157.470790][ T1014] ata1.00: irq_stat 0x41000000 [ 157.480554][ T1014] ata1.00: failed command: WRITE FPDMA QUEUED [ 157.483383][ T1014] ata1.00: cmd 61/00:a8:36:61:05/20:00:00:00:00/40 tag= 21 ncq dma 4194304 ou [ 157.483383][ T1014] res 50/04:00:00:00:00/00:00:00:00:00/00 Ema= sk 0x1 (device error) [ 157.491197][ T1014] ata1.00: status: { DRDY } [ 157.493200][ T1014] ata1.00: error: { ABRT } [ 157.496680][ T1014] ata1.00: configured for UDMA/100 [ 157.499460][ T1014] 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-build3275867337=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 d1b870e1003b 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=3Dd1b870e1003b52891d2196c1e2ee42fe905010ba -X github.com/goo= gle/syzkaller/prog.gitRevisionDate=3D20251128-125159" ./sys/syz-sysgen | g= rep -q false || go install -ldflags=3D"-s -w -X github.com/google/syzkaller= /prog.GitRevision=3Dd1b870e1003b52891d2196c1e2ee42fe905010ba -X github.com/= google/syzkaller/prog.gitRevisionDate=3D20251128-125159" ./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=3Dd1b870e1003b52891d2196c1e2ee42fe905010ba -X g= ithub.com/google/syzkaller/prog.gitRevisionDate=3D20251128-125159" -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\"d1b870e1003b52891d2196c1e2ee42fe90= 5010ba\" /usr/bin/ld: /tmp/ccpJgQJT.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: 43cfbdda Merge tag 'for-linus-iommufd' of git://git.ke.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/li= nux.git master kernel config: https://syzkaller.appspot.com/x/.config?x=3D54b300c91b61ad1= 0 dashboard link: https://syzkaller.appspot.com/bug?extid=3D3e2c95229d1ab81a0= bfd 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=3D11f70fca5800= 00