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Message-ID: <000000000000a296af061c6381fc@google.com>
Date: Wed, 03 Jul 2024 20:26:02 -0700
From: syzbot <syzbot+35a4414f6e247f515443@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, lizhi.xu@...driver.com, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [kernel?] WARNING in follow_pte

Hello,

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

442 004144454141424e
ZMM27=0000000000000000 0000000000000000 0000000000000000 0000000000000000 282b2e2fdf37342d 280bbfbf23243324 26312033fc040f18 1317140d080b0412
ZMM28=0000000000000000 0000000000000000 0000000000000000 0000000000000000 343133bffc121104 1214041204110814 100411bffc040f18 1317140d080b0412
ZMM29=0000000000000000 0000000000000000 0000000000000000 0000000000000000 4141414141414141 4141414141414141 4141414141414141 4141414141414141
ZMM30=0000000000000000 0000000000000000 0000000000000000 0000000000000000 1a1a1a1a1a1a1a1a 1a1a1a1a1a1a1a1a 1a1a1a1a1a1a1a1a 1a1a1a1a1a1a1a1a
ZMM31=0000000000000000 0000000000000000 0000000000000000 0000000000000000 2020202020202020 2020202020202020 2020202020202020 2020202020202020
info registers vcpu 2

CPU#2
RAX=0000000000025c7c RBX=0000000000000002 RCX=ffffffff8ae75899 RDX=ffffed100d646fde
RSI=ffffffff8b8ff580 RDI=ffffffff8166387c RBP=ffffed1002fd9000 RSP=ffffc90000197e08
R8 =0000000000000000 R9 =ffffed100d646fdd R10=ffff88806b237eeb R11=0000000000000000
R12=0000000000000002 R13=ffff888017ec8000 R14=ffffffff8fe44110 R15=0000000000000000
RIP=ffffffff8ae76c8f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1
ES =0000 0000000000000000 ffffffff 00c00000
CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA]
SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0000 0000000000000000 ffffffff 00c00000
FS =0000 0000000000000000 ffffffff 00c00000
GS =0000 ffff88806b200000 ffffffff 00c00000
LDT=0000 0000000000000000 ffffffff 00c00000
TR =0040 fffffe0000091000 00004087 00008b00 DPL=0 TSS64-busy
GDT=     fffffe000008f000 0000007f
IDT=     fffffe0000000000 00000fff
CR0=80050033 CR2=00007f8cbb1a9b50 CR3=000000002a590000 CR4=00350ef0
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 
DR6=00000000fffe0ff0 DR7=0000000000000400
EFER=0000000000000d01
FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80
FPR0=0000000000000000 0000 FPR1=0000000000000000 0000
FPR2=0000000000000000 0000 FPR3=0000000000000000 0000
FPR4=0000000000000000 0000 FPR5=0000000000000000 0000
FPR6=0000000000000000 0000 FPR7=0000000000000000 0000
Opmask00=000000001000c0d0 Opmask01=0000000080000000 Opmask02=000000000000ffdf Opmask03=0000000000000000
Opmask04=00000000ffdfffff Opmask05=00000000004007ff Opmask06=0000000007ffe7ff Opmask07=0000000000000000
ZMM00=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM01=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 000055de380b4540 000055de3808da00
ZMM02=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 2f2f2f2f2f2f2f2f 2f2f2f2f2f2f2f2f
ZMM03=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000ff0000000000 00000000ff000000
ZMM04=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 00000000ff000000
ZMM05=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM06=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM07=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM08=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM09=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM10=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM11=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM12=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM13=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM14=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM15=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM16=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM17=0000000000000000 0000000000000000 0000000000000000 0000000000000000 3130323a30696368 2f306963682f6874 6f6f7465756c622f 6c6175747269762f
ZMM18=0000000000000000 0000000000000000 0000000000000000 0000000000000000 6f6f742079617272 6120656c75722079 7261726f706d6574 002a3f005b3f2a00
ZMM19=0000000000000000 0000000000000000 0000000000000000 0000000000000000 4a4a51055c445757 440540495057055c 5744574a55484051 000f1a005b1a0f00
ZMM20=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000041 0000000000000000 000000003130323a 306963682f306963
ZMM21=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 3031313837333033 0000000000000021 0000000000007374
ZMM22=0000000000000000 0000000000000000 0000000000000000 0000000000000000 68303e3b3a38253b 3a253e3a6e68303b 21383b657a687438 2739243c3b243b27
ZMM23=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM24=0000000000000000 0000000000000000 0000000000000000 0000000000000000 69305f474f5b647c 6930382432273f39 7b27697a787c7a30 23333a3a38263342
ZMM25=0000000000000000 0000000000000000 0000000000000000 0000000000000000 4f45454d41490054 454e5f4449692e6e 6524004452414f42 4e4f5f454d414e5f
ZMM26=0000000000000000 0000000000000000 0000000000000000 0000000000000000 4445414d41450000 454e4c4449452e41 002400444c414442 004144454141424e
ZMM27=0000000000000000 0000000000000000 0000000000000000 0000000000000000 282b2e2fdf37342d 280bbfbf23243324 26312033fc040f18 1317140d080b0412
ZMM28=0000000000000000 0000000000000000 0000000000000000 0000000000000000 343133bffc121104 1214041204110814 100411bffc040f18 1317140d080b0412
ZMM29=0000000000000000 0000000000000000 0000000000000000 0000000000000000 4141414141414141 4141414141414141 4141414141414141 4141414141414141
ZMM30=0000000000000000 0000000000000000 0000000000000000 0000000000000000 1a1a1a1a1a1a1a1a 1a1a1a1a1a1a1a1a 1a1a1a1a1a1a1a1a 1a1a1a1a1a1a1a1a
ZMM31=0000000000000000 0000000000000000 0000000000000000 0000000000000000 2020202020202020 2020202020202020 2020202020202020 2020202020202020
info registers vcpu 3

CPU#3
RAX=00000000000277bc RBX=0000000000000003 RCX=ffffffff8ae75899 RDX=ffffed100d666fde
RSI=ffffffff8b8ff580 RDI=ffffffff8166387c RBP=ffffed1002fd9488 RSP=ffffc900001a7e08
R8 =0000000000000000 R9 =ffffed100d666fdd R10=ffff88806b337eeb R11=0000000000000000
R12=0000000000000003 R13=ffff888017eca440 R14=ffffffff8fe44110 R15=0000000000000000
RIP=ffffffff8ae76c8f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1
ES =0000 0000000000000000 ffffffff 00c00000
CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA]
SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0000 0000000000000000 ffffffff 00c00000
FS =0000 0000000000000000 ffffffff 00c00000
GS =0000 ffff88806b300000 ffffffff 00c00000
LDT=0000 0000000000000000 ffffffff 00c00000
TR =0040 fffffe00000d8000 00004087 00008b00 DPL=0 TSS64-busy
GDT=     fffffe00000d6000 0000007f
IDT=     fffffe0000000000 00000fff
CR0=80050033 CR2=00007f94bd905a6c CR3=000000002a590000 CR4=00350ef0
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 
DR6=00000000fffe0ff0 DR7=0000000000000400
EFER=0000000000000d01
FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80
FPR0=0000000000000000 0000 FPR1=0000000000000000 0000
FPR2=0000000000000000 0000 FPR3=0000000000000000 0000
FPR4=0000000000000000 0000 FPR5=0000000000000000 0000
FPR6=0000000000000000 0000 FPR7=0000000000000000 0000
Opmask00=000000001000c0d0 Opmask01=0000000080000000 Opmask02=000000000000ffdf Opmask03=0000000000000000
Opmask04=00000000ffdfffff Opmask05=00000000004007ff Opmask06=0000000007ffe7ff Opmask07=0000000000000000
ZMM00=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM01=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 000055de380b4540 000055de3808da00
ZMM02=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 2f2f2f2f2f2f2f2f 2f2f2f2f2f2f2f2f
ZMM03=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000ff0000000000 00000000ff000000
ZMM04=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 00000000ff000000
ZMM05=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM06=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM07=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM08=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM09=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM10=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM11=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM12=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM13=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM14=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM15=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM16=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM17=0000000000000000 0000000000000000 0000000000000000 0000000000000000 3130323a30696368 2f306963682f6874 6f6f7465756c622f 6c6175747269762f
ZMM18=0000000000000000 0000000000000000 0000000000000000 0000000000000000 6f6f742079617272 6120656c75722079 7261726f706d6574 002a3f005b3f2a00
ZMM19=0000000000000000 0000000000000000 0000000000000000 0000000000000000 4a4a51055c445757 440540495057055c 5744574a55484051 000f1a005b1a0f00
ZMM20=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000041 0000000000000000 000000003130323a 306963682f306963
ZMM21=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 3031313837333033 0000000000000021 0000000000007374
ZMM22=0000000000000000 0000000000000000 0000000000000000 0000000000000000 68303e3b3a38253b 3a253e3a6e68303b 21383b657a687438 2739243c3b243b27
ZMM23=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM24=0000000000000000 0000000000000000 0000000000000000 0000000000000000 69305f474f5b647c 6930382432273f39 7b27697a787c7a30 23333a3a38263342
ZMM25=0000000000000000 0000000000000000 0000000000000000 0000000000000000 4f45454d41490054 454e5f4449692e6e 6524004452414f42 4e4f5f454d414e5f
ZMM26=0000000000000000 0000000000000000 0000000000000000 0000000000000000 4445414d41450000 454e4c4449452e41 002400444c414442 004144454141424e
ZMM27=0000000000000000 0000000000000000 0000000000000000 0000000000000000 282b2e2fdf37342d 280bbfbf23243324 26312033fc040f18 1317140d080b0412
ZMM28=0000000000000000 0000000000000000 0000000000000000 0000000000000000 343133bffc121104 1214041204110814 100411bffc040f18 1317140d080b0412
ZMM29=0000000000000000 0000000000000000 0000000000000000 0000000000000000 4141414141414141 4141414141414141 4141414141414141 4141414141414141
ZMM30=0000000000000000 0000000000000000 0000000000000000 0000000000000000 1a1a1a1a1a1a1a1a 1a1a1a1a1a1a1a1a 1a1a1a1a1a1a1a1a 1a1a1a1a1a1a1a1a
ZMM31=0000000000000000 0000000000000000 0000000000000000 0000000000000000 2020202020202020 2020202020202020 2020202020202020 2020202020202020


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/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'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.21.4'
GCCGO='gccgo'
GOAMD64='v1'
AR='ar'
CC='gcc'
CXX='g++'
CGO_ENABLED='1'
GOMOD='/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/go.mod'
GOWORK=''
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
PKG_CONFIG='pkg-config'
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build2952157381=/tmp/go-build -gno-record-gcc-switches'

git status (err=<nil>)
HEAD detached at 1ecfa2d85
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 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
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
go fmt ./sys/... >/dev/null
touch .descriptions
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=1ecfa2d8506efdae0483eedc0b425db8537b6e80 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240702-162210'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/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 -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 -fpermissive -w -DGOOS_linux=1 -DGOARCH_amd64=1 \
	-DHOSTGOOS_linux=1 -DGIT_REVISION=\"1ecfa2d8506efdae0483eedc0b425db8537b6e80\"
/usr/bin/ld: /tmp/ccFcxoKa.o: in function `test_cover_filter()':
executor.cc:(.text+0x133fb): warning: the use of `tempnam' is dangerous, better use `mkstemp'
/usr/bin/ld: /tmp/ccFcxoKa.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x1a0): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
# Temporal hack to pre-created removed syz-fuzzer,
# since old version of syz-ci still wants to copy it.
touch ./bin/linux_amd64/syz-fuzzer


Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=15574d15980000


Tested on:

commit:         73461051 Merge tag 'erofs-for-6.10-rc7-fixes' of git:/..
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel config:  https://syzkaller.appspot.com/x/.config?x=de2d4dc103148cd6
dashboard link: https://syzkaller.appspot.com/bug?extid=35a4414f6e247f515443
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
patch:          https://syzkaller.appspot.com/x/patch.diff?x=168779c1980000

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