Re: [syzbot] [xfs?] KASAN: stack-out-of-bounds Read in xfs_buf_lock

[Dmitry Vyukov]

On Mon, 23 Jan 2023 at 12:42, syzbot
<syzbot+0bc698a422b5e4ac988c@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> Hello,
>
> syzbot tried to test the proposed patch but the build/boot failed:
>
> failed to delete instance: googleapi: Error 400: Invalid value for field 'instance': 'ci-upstream-kasan-gce-root-test-job-parallel-test-job-parallel-1'. Must be a match of regex '[a-z](?:[-a-z0-9]{0,61}[a-z0-9])?|[1-9][0-9]{0,19}', invalid

+Aleksandr, was this fixed already?

> syzkaller build log:
> go env (err=<nil>)
> GO111MODULE="auto"
> GOARCH="amd64"
> GOBIN=""
> GOCACHE="/syzkaller/.cache/go-build"
> GOENV="/syzkaller/.config/go/env"
> GOEXE=""
> GOEXPERIMENT=""
> GOFLAGS=""
> GOHOSTARCH="amd64"
> GOHOSTOS="linux"
> GOINSECURE=""
> GOMODCACHE="/syzkaller/jobs-2/linux/gopath/pkg/mod"
> GONOPROXY=""
> GONOSUMDB=""
> GOOS="linux"
> GOPATH="/syzkaller/jobs-2/linux/gopath"
> GOPRIVATE=""
> GOPROXY="https://proxy.golang.org,direct";
> GOROOT="/usr/local/go"
> GOSUMDB="sum.golang.org"
> GOTMPDIR=""
> GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
> GOVCS=""
> GOVERSION="go1.17"
> GCCGO="gccgo"
> AR="ar"
> CC="gcc"
> CXX="g++"
> CGO_ENABLED="1"
> GOMOD="/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.mod"
> CGO_CFLAGS="-g -O2"
> CGO_CPPFLAGS=""
> CGO_CXXFLAGS="-g -O2"
> CGO_FFLAGS="-g -O2"
> CGO_LDFLAGS="-g -O2"
> PKG_CONFIG="pkg-config"
> GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build480514578=/tmp/go-build -gno-record-gcc-switches"
>
> git status (err=<nil>)
> HEAD detached at 1dac8c7a0
> 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:32: run command via tools/syz-env for best compatibility, see:
> Makefile:33: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
> go list -f '{{.Stale}}' ./sys/syz-sysgen | grep -q false || go install ./sys/syz-sysgen
> make .descriptions
> tput: No value for $TERM and no -T specified
> tput: No value for $TERM and no -T specified
> bin/syz-sysgen
> touch .descriptions
> GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=1dac8c7a01e2bdd35cb04eb4901ddb157291ac2d -X 'github.com/google/syzkaller/prog.gitRevisionDate=20230103-123455'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-fuzzer github.com/google/syzkaller/syz-fuzzer
> GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=1dac8c7a01e2bdd35cb04eb4901ddb157291ac2d -X 'github.com/google/syzkaller/prog.gitRevisionDate=20230103-123455'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
> GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=1dac8c7a01e2bdd35cb04eb4901ddb157291ac2d -X 'github.com/google/syzkaller/prog.gitRevisionDate=20230103-123455'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-stress github.com/google/syzkaller/tools/syz-stress
> mkdir -p ./bin/linux_amd64
> gcc -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 -static-pie -fpermissive -w -DGOOS_linux=1 -DGOARCH_amd64=1 \
>         -DHOSTGOOS_linux=1 -DGIT_REVISION=\"1dac8c7a01e2bdd35cb04eb4901ddb157291ac2d\"
>
>
>
> Tested on:
>
> commit:         7dd4b804 Merge tag 'nfsd-6.2-3' of git://git.kernel.or..
> git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> kernel config:  https://syzkaller.appspot.com/x/.config?x=2b6ecad960fc703e
> dashboard link: https://syzkaller.appspot.com/bug?extid=0bc698a422b5e4ac988c
> compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> patch:          https://syzkaller.appspot.com/x/patch.diff?x=145887ee480000