Message-ID: <66e401e2.050a0220.2e1f95.0000.GAE@google.com>
Date: Fri, 13 Sep 2024 02:12:02 -0700
From: syzbot <syzbot+17cae3c0a5b0acdc327d@...kaller.appspotmail.com>
To: ksjoe30@...il.com, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [crypto?] [ntfs3?] KMSAN: uninit-value in sw842_compress

Hello,

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

t Branch Prediction Barrier
[    0.233228] Spectre V2 : User space: Mitigation: STIBP via seccomp and prctl
[    0.234229] Speculative Store Bypass: Mitigation: Speculative Store Bypass disabled via prctl and seccomp
[    0.235273] TAA: Mitigation: Clear CPU buffers
[    0.236227] MDS: Mitigation: Clear CPU buffers
[    0.237511] Freeing SMP alternatives memory: 40K
[    0.341387] smpboot: CPU0: Intel(R) Xeon(R) CPU @ 2.20GHz (family: 0x6, model: 0x4f, stepping: 0x0)
[    0.342342] Performance Events: unsupported p6 CPU model 79 no PMU driver, software events only.
[    0.343304] rcu: Hierarchical SRCU implementation.
[    0.344161] smp: Bringing up secondary CPUs ...
[    0.344313] x86: Booting SMP configuration:
[    0.345227] .... node  #0, CPUs:      #1
[    0.101781] kvm-clock: cpu 1, msr ab0a2041, secondary cpu clock
[    0.346631] kvm-stealtime: cpu 1, msr 237b15200
[    0.348334] MDS CPU bug present and SMT on, data leak possible. See https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/mds.html for more details.
[    0.349230] TAA CPU bug present and SMT on, data leak possible. See https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/tsx_async_abort.html for more details.
[    0.350234] smp: Brought up 1 node, 2 CPUs
[    0.350810] smpboot: Max logical packages: 1
[    0.351228] smpboot: Total of 2 processors activated (8800.63 BogoMIPS)
[    0.352460] devtmpfs: initialized
[    0.353294] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1911260446275000 ns
[    0.353284] kworker/u4:0 (22) used greatest stack depth: 14336 bytes left
[    0.354234] futex hash table entries: 512 (order: 3, 32768 bytes)
[    0.357373] RTC time:  9:02:57, date: 09/13/24
[    0.359244] NET: Registered protocol family 16
[    0.359931] audit: initializing netlink subsys (disabled)
[    0.361244] audit: type=2000 audit(1726218177.184:1): state=initialized audit_enabled=0 res=1
[    0.361614] kworker/u4:1 (28) used greatest stack depth: 13936 bytes left
[    0.363236] cpuidle: using governor menu
[    0.363337] ACPI: bus type PCI registered
[    0.364372] PCI: Using configuration type 1 for base access
[    0.373228] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages
[    0.374282] ACPI: Added _OSI(Module Device)
[    0.375233] ACPI: Added _OSI(Processor Device)
[    0.376233] ACPI: Added _OSI(3.0 _SCP Extensions)
[    0.377003] ACPI: Added _OSI(Processor Aggregator Device)
[    0.377233] ACPI: Added _OSI(Linux-Dell-Video)
[    0.377886] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio)
[    0.379869] ACPI: 2 ACPI AML tables successfully acquired and loaded
[    0.381674] ACPI: Interpreter enabled
[    0.382248] ACPI: (supports S0 S3 S4 S5)
[    0.383229] ACPI: Using IOAPIC for interrupt routing
[    0.384235] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[    0.385415] ACPI: Enabled 16 GPEs in block 00 to 0F
[    0.390247] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
[    0.391232] acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments MSI]
[    0.392256] acpi PNP0A03:00: _OSC failed (AE_NOT_FOUND); disabling ASPM
[    0.393238] acpi PNP0A03:00: fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge.
[    0.394358] PCI host bridge to bus 0000:00
[    0.395229] pci_bus 0000:00: root bus resource [io  0x0000-0x0cf7 window]
[    0.396163] pci_bus 0000:00: root bus resource [io  0x0d00-0xffff window]
[    0.397229] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window]
[    0.398228] pci_bus 0000:00: root bus resource [mem 0xc0000000-0xfebfefff window]
[    0.399229] pci_bus 0000:00: root bus resource [bus 00-ff]
[    0.434280] pci 0000:00:01.3: quirk: [io  0xb000-0xb03f] claimed by PIIX4 ACPI
[    0.547277] ACPI: PCI Interrupt Link [LNKA] (IRQs 5 *10 11)
[    0.549289] ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11)
[    0.551285] ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11)
[    0.553288] ACPI: PCI Interrupt Link [LNKD] (IRQs 5 10 *11)
[    0.555248] ACPI: PCI Interrupt Link [LNKS] (IRQs *9)
[    0.556431] pci 0000:00:05.0: vgaarb: setting as boot VGA device
[    0.557203] pci 0000:00:05.0: vgaarb: VGA device added: decodes=io+mem,owns=io+mem,locks=none
[    0.558231] pci 0000:00:05.0: vgaarb: bridge control possible
[    0.559227] vgaarb: loaded
[    0.560232] SCSI subsystem initialized
[    0.560305] ACPI: bus type USB registered
[    0.561274] usbcore: registered new interface driver usbfs
[    0.562273] usbcore: registered new interface driver hub
[    0.562273] usbcore: registered new device driver usb
[    0.563253] pps_core: LinuxPPS API ver. 1 registered
[    0.564228] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@...ux.it>
[    0.565235] PTP clock support registered
[    0.566249] EDAC MC: Ver: 3.0.0
[    0.567225] Advanced Linux Sound Architecture Driver Initialized.
[    0.567303] PCI: Using ACPI for IRQ routing
[    0.569227] NetLabel: Initializing
[    0.569228] NetLabel:  domain hash size = 128
[    0.569834] NetLabel:  protocols = UNLABELED CIPSOv4 CALIPSO
[    0.570252] NetLabel:  unlabeled traffic allowed by default
[    0.571325] clocksource: Switched to clocksource kvm-clock
[    0.580325] VFS: Disk quotas dquot_6.6.0
[    0.581125] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[    0.582192] pnp: PnP ACPI init
[    0.583276] pnp: PnP ACPI: found 7 devices
[    0.590974] clocksource: acpi_pm: mask: 0xffffff max_cycles: 0xffffff, max_idle_ns: 2085701024 ns
[    0.592383] NET: Registered protocol family 2
[    0.593291] IP idents hash table entries: 131072 (order: 8, 1048576 bytes)
[    0.595192] tcp_listen_portaddr_hash hash table entries: 4096 (order: 4, 65536 bytes)
[    0.596433] TCP established hash table entries: 65536 (order: 7, 524288 bytes)
[    0.597549] TCP bind hash table entries: 65536 (order: 8, 1048576 bytes)
[    0.598661] TCP: Hash tables configured (established 65536 bind 65536)
[    0.599636] UDP hash table entries: 4096 (order: 5, 131072 bytes)
[    0.600500] UDP-Lite hash table entries: 4096 (order: 5, 131072 bytes)
[    0.601494] NET: Registered protocol family 1
[    0.602346] RPC: Registered named UNIX socket transport module.
[    0.603270] RPC: Registered udp transport module.
[    0.603959] RPC: Registered tcp transport module.
[    0.604648] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    0.605680] pci 0000:00:00.0: Limiting direct PCI/PCI transfers
[    0.606569] pci 0000:00:05.0: Video device with shadowed ROM at [mem 0x000c0000-0x000dffff]
[    0.607780] PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
[    0.608649] software IO TLB: mapped [mem 0xbbffd000-0xbfffd000] (64MB)
[    0.609637] RAPL PMU: API unit is 2^-32 Joules, 3 fixed counters, 10737418240 ms ovfl timer
[    0.611144] RAPL PMU: hw unit of domain pp0-core 2^-0 Joules
[    0.611974] RAPL PMU: hw unit of domain package 2^-0 Joules
[    0.612737] RAPL PMU: hw unit of domain dram 2^-16 Joules
[    0.613501] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x1fb6c80a799, max_idle_ns: 440795272342 ns
[    0.615219] Scanning for low memory corruption every 60 seconds
[    0.616680] Initialise system trusted keyrings
[    0.617443] workingset: timestamp_bits=56 max_order=21 bucket_order=0
[    0.620806] NFS: Registering the id_resolver key type
[    0.621695] Key type id_resolver registered
[    0.622358] Key type id_legacy registered
[    0.625266] Key type asymmetric registered
[    0.625855] Asymmetric key parser 'x509' registered
[    0.626648] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 251)
[    0.627648] io scheduler noop registered
[    0.628206] io scheduler deadline registered
[    0.628835] io scheduler cfq registered (default)
[    0.629506] io scheduler mq-deadline registered
[    0.630141] io scheduler kyber registered
[    0.630926] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
[    0.631962] ACPI: Power Button [PWRF]
[    0.632576] input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1
[    0.633600] ACPI: Sleep Button [SLPF]
[    0.636091] PCI Interrupt Link [LNKC] enabled at IRQ 11
[    0.636921] virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
[    0.642090] PCI Interrupt Link [LNKD] enabled at IRQ 10
[    0.642888] virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver
[    0.649581] PCI Interrupt Link [LNKB] enabled at IRQ 10
[    0.650373] virtio-pci 0000:00:06.0: virtio_pci: leaving for legacy driver
[    0.654995] virtio-pci 0000:00:07.0: virtio_pci: leaving for legacy driver
[    0.670716] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[    0.693031] 00:03: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
[    0.715987] 00:04: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
[    0.739118] 00:05: ttyS2 at I/O 0x3e8 (irq = 6, base_baud = 115200) is a 16550A
[    0.762116] 00:06: ttyS3 at I/O 0x2e8 (irq = 7, base_baud = 115200) is a 16550A
[    0.764122] Non-volatile memory driver v1.3
[    0.764885] Linux agpgart interface v0.103
[    0.767721] loop: module loaded
[    0.807436] e100: Intel(R) PRO/100 Network Driver, 3.5.24-k2-NAPI
[    0.808493] e100: Copyright(c) 1999-2006 Intel Corporation
[    0.809449] e1000: Intel(R) PRO/1000 Network Driver - version 7.3.21-k8-NAPI
[    0.810633] e1000: Copyright (c) 1999-2006 Intel Corporation.
[    0.811513] e1000e: Intel(R) PRO/1000 Network Driver - 3.2.6-k
[    0.812734] e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
[    0.813744] sky2: driver version 1.30
[    0.814550] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    0.815443] ehci-pci: EHCI PCI platform driver
[    0.816075] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    0.817012] ohci-pci: OHCI PCI platform driver
[    0.817610] uhci_hcd: USB Universal Host Controller Interface driver
[    0.818556] usbcore: registered new interface driver usblp
[    0.819172] usbcore: registered new interface driver usb-storage
[    0.820220] i8042: PNP: PS/2 Controller [PNP0303:KBD,PNP0f13:MOU] at 0x60,0x64 irq 1,12
[    0.821924] i8042: Warning: Keylock active
[    0.824090] serio: i8042 KBD port at 0x60,0x64 irq 1
[    0.825039] serio: i8042 AUX port at 0x60,0x64 irq 12
[    0.826219] rtc_cmos 00:00: RTC can wake from S4
[    0.827575] rtc_cmos 00:00: registered as rtc0
[    0.828412] rtc_cmos 00:00: alarms up to one day, 114 bytes nvram
[    0.829685] device-mapper: ioctl: 4.39.0-ioctl (2018-04-03) initialised: dm-devel@...hat.com
[    0.831360] hidraw: raw HID events driver (C) Jiri Kosina
[    0.832320] usbcore: registered new interface driver usbhid
[    0.833381] usbhid: USB HID core driver
[    0.834620] Initializing XFRM netlink socket
[    0.835375] NET: Registered protocol family 10
[    0.836515] Segment Routing with IPv6
[    0.837254] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
[    0.838155] NET: Registered protocol family 17
[    0.838961] Key type dns_resolver registered
[    0.840070] mce: Using 32 MCE banks
[    0.840614] sched_clock: Marking stable (739805965, 100781643)->(860712230, -20124622)
[    0.841974] registered taskstats version 1
[    0.842560] Loading compiled-in X.509 certificates
[    0.843835]   Magic number: 8:908:19
[    0.844533] console [netcon0] enabled
[    0.845127] netconsole: network logging started
[    0.846185] ALSA device list:
[    0.847369]   No soundcards found.
[    1.030526] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input2
[    1.446640] random: fast init done
[    1.447709] input: ImExPS/2 Generic Explorer Mouse as /devices/platform/i8042/serio1/input/input4
[    1.449201] md: Waiting for all devices to be available before autodetect
[    1.450219] md: If you don't use raid, use raid=noautodetect
[    1.451193] md: Autodetecting RAID arrays.
[    1.451815] md: autorun ...
[    1.452213] md: ... autorun DONE.
[    1.452772] VFS: Cannot open root device "sda1" or unknown-block(0,0): error -6
[    1.453832] Please append a correct "root=" boot option; here are the available partitions:
[    1.455077] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[    1.456263] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.19.204 #1
[    1.457133] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
[    1.458370] Call Trace:
[    1.458728]  dump_stack+0x69/0x84
[    1.459192]  panic+0xe2/0x236
[    1.459616]  mount_block_root+0x189/0x226
[    1.460186]  mount_root+0x10a/0x127
[    1.460709]  prepare_namespace+0x13a/0x172
[    1.461273]  kernel_init_freeable+0x1f7/0x20c
[    1.461869]  ? rest_init+0xa0/0xa0
[    1.462352]  kernel_init+0x9/0xfc
[    1.462832]  ret_from_fork+0x35/0x40
[    1.463467] Kernel Offset: 0x2c200000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[    1.465034] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) ]---


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=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.22.7'
GCCGO='gccgo'
GOAMD64='v1'
AR='ar'
CC='gcc'
CXX='g++'
CGO_ENABLED='1'
GOMOD='/syzkaller/jobs-2/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-build3057085696=/tmp/go-build -gno-record-gcc-switches'

git status (err=<nil>)
HEAD detached at 9d47f20a1c
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=9d47f20a1c5cfc0e89b8e37d0175d69be81ad9a9 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240903-155700'" "-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=\"9d47f20a1c5cfc0e89b8e37d0175d69be81ad9a9\"
/usr/bin/ld: /tmp/ccOaDBGX.o: in function `test_cover_filter()':
executor.cc:(.text+0x1412b): warning: the use of `tempnam' is dangerous, better use `mkstemp'
/usr/bin/ld: /tmp/ccOaDBGX.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x104): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking


Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=14c8549f980000


Tested on:

commit:         196145c6 Merge tag 'clk-fixes-for-linus' of git://git...
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=ea008021530b2de3
dashboard link: https://syzkaller.appspot.com/bug?extid=17cae3c0a5b0acdc327d
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch:          https://syzkaller.appspot.com/x/patch.diff?x=16e427c7980000

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