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Date: Tue, 20 Feb 2024 14:50:37 +0800
From: Gao Xiang <hsiangkao@...ux.alibaba.com>
To: syzbot <syzbot+88ad8b0517a9d3bb9dc8@...kaller.appspotmail.com>,
chao@...nel.org, huyue2@...lpad.com, jefflexu@...ux.alibaba.com,
linux-erofs@...ts.ozlabs.org, linux-fsdevel@...r.kernel.org,
linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com,
xiang@...nel.org
Subject: Re: [syzbot] [erofs?] KMSAN: uninit-value in z_erofs_lz4_decompress
(3)
#syz test git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
On 2024/2/2 00:57, syzbot wrote:
> Hello,
>
> syzbot tried to test the proposed patch but the build/boot failed:
>
> [ T1] NFS: Registering the id_resolver key type
> [ 20.847533][ T1] Key type id_resolver registered
> [ 20.852991][ T1] Key type id_legacy registered
> [ 20.859477][ T1] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
> [ 20.868251][ T1] nfs4flexfilelayout_init: NFSv4 Flexfile Layout Driver Registering...
> [ 20.901326][ T1] Key type cifs.spnego registered
> [ 20.907727][ T1] Key type cifs.idmap registered
> [ 20.917413][ T1] ntfs: driver 2.1.32 [Flags: R/W].
> [ 20.923298][ T1] ntfs3: Max link count 4000
> [ 20.928297][ T1] ntfs3: Enabled Linux POSIX ACLs support
> [ 20.934148][ T1] ntfs3: Read-only LZX/Xpress compression included
> [ 20.941172][ T1] efs: 1.0a - http://aeschi.ch.eu.org/efs/
> [ 20.947393][ T1] romfs: ROMFS MTD (C) 2007 Red Hat, Inc.
> [ 20.953397][ T1] QNX4 filesystem 0.2.3 registered.
> [ 20.958982][ T1] qnx6: QNX6 filesystem 1.0.0 registered.
> [ 20.965985][ T1] fuse: init (API version 7.39)
> [ 20.976858][ T1] orangefs_debugfs_init: called with debug mask: :none: :0:
> [ 20.985505][ T1] orangefs_init: module version upstream loaded
> [ 20.993572][ T1] JFS: nTxBlock = 8192, nTxLock = 65536
> [ 21.034087][ T1] SGI XFS with ACLs, security attributes, realtime, quota, no debug enabled
> [ 21.051635][ T1] 9p: Installing v9fs 9p2000 file system support
> [ 21.058997][ T1] NILFS version 2 loaded
> [ 21.063484][ T1] befs: version: 0.9.3
> [ 21.068879][ T1] ocfs2: Registered cluster interface o2cb
> [ 21.075961][ T1] ocfs2: Registered cluster interface user
> [ 21.083257][ T1] OCFS2 User DLM kernel interface loaded
> [ 21.102750][ T1] gfs2: GFS2 installed
> [ 21.142225][ T1] ceph: loaded (mds proto 32)
> [ 25.265679][ T1] NET: Registered PF_ALG protocol family
> [ 25.271965][ T1] xor: automatically using best checksumming function avx
> [ 25.280055][ T1] async_tx: api initialized (async)
> [ 25.285498][ T1] Key type asymmetric registered
> [ 25.290927][ T1] Asymmetric key parser 'x509' registered
> [ 25.296825][ T1] Asymmetric key parser 'pkcs8' registered
> [ 25.302732][ T1] Key type pkcs7_test registered
> [ 25.308482][ T1] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 240)
> [ 25.318600][ T1] io scheduler mq-deadline registered
> [ 25.324054][ T1] io scheduler kyber registered
> [ 25.331126][ T1] io scheduler bfq registered
> [ 25.347558][ T1] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
> [ 25.363347][ T136] kworker/u4:0 (136) used greatest stack depth: 11000 bytes left
> [ 25.374100][ T1] ACPI: button: Power Button [PWRF]
> [ 25.381760][ T1] input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1
> [ 25.392277][ T1] ACPI: button: Sleep Button [SLPF]
> [ 25.414526][ T1] ioatdma: Intel(R) QuickData Technology Driver 5.00
> [ 25.499231][ T1] ACPI: \_SB_.LNKC: Enabled at IRQ 11
> [ 25.505226][ T1] virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
> [ 25.579195][ T1] ACPI: \_SB_.LNKD: Enabled at IRQ 10
> [ 25.585070][ T1] virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver
> [ 25.662347][ T1] ACPI: \_SB_.LNKB: Enabled at IRQ 10
> [ 25.668284][ T1] virtio-pci 0000:00:06.0: virtio_pci: leaving for legacy driver
> [ 25.725221][ T1] virtio-pci 0000:00:07.0: virtio_pci: leaving for legacy driver
> [ 26.750369][ T1] N_HDLC line discipline registered with maxframe=4096
> [ 26.758188][ T1] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
> [ 26.770021][ T1] 00:03: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
> [ 26.799322][ T1] 00:04: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
> [ 26.828884][ T1] 00:05: ttyS2 at I/O 0x3e8 (irq = 6, base_baud = 115200) is a 16550A
> [ 26.856640][ T1] 00:06: ttyS3 at I/O 0x2e8 (irq = 7, base_baud = 115200) is a 16550A
> [ 26.903869][ T1] Non-volatile memory driver v1.3
> [ 26.925949][ T1] Linux agpgart interface v0.103
> [ 26.944845][ T1] ACPI: bus type drm_connector registered
> [ 26.963460][ T1] [drm] Initialized vgem 1.0.0 20120112 for vgem on minor 0
> [ 26.985308][ T1] [drm] Initialized vkms 1.0.0 20180514 for vkms on minor 1
> [ 27.457414][ T1] Console: switching to colour frame buffer device 128x48
> [ 27.612960][ T1] platform vkms: [drm] fb0: vkmsdrmfb frame buffer device
> [ 27.621207][ T1] usbcore: registered new interface driver udl
> [ 27.785853][ T1] brd: module loaded
> [ 27.962515][ T1] loop: module loaded
> [ 28.204419][ T1] zram: Added device: zram0
> [ 28.227930][ T1] null_blk: disk nullb0 created
> [ 28.232984][ T1] null_blk: module loaded
> [ 28.238841][ T1] Guest personality initialized and is inactive
> [ 28.247691][ T1] VMCI host device registered (name=vmci, major=10, minor=118)
> [ 28.255558][ T1] Initialized host personality
> [ 28.261000][ T1] usbcore: registered new interface driver rtsx_usb
> [ 28.269847][ T1] usbcore: registered new interface driver viperboard
> [ 28.277538][ T1] usbcore: registered new interface driver dln2
> [ 28.284724][ T1] usbcore: registered new interface driver pn533_usb
> [ 28.297696][ T1] nfcsim 0.2 initialized
> [ 28.302508][ T1] usbcore: registered new interface driver port100
> [ 28.309540][ T1] usbcore: registered new interface driver nfcmrvl
> [ 28.325751][ T1] Loading iSCSI transport class v2.0-870.
> [ 28.358008][ T1] virtio_scsi virtio0: 1/0/0 default/read/poll queues
> [ 28.395519][ T1] scsi host0: Virtio SCSI HBA
> [ 28.917048][ T1] st: Version 20160209, fixed bufsize 32768, s/g segs 256
> [ 28.933542][ T11] scsi 0:0:1:0: Direct-Access Google PersistentDisk 1 PQ: 0 ANSI: 6
> [ 28.978523][ T1] Rounding down aligned max_sectors from 4294967295 to 4294967288
> [ 28.988652][ T1] db_root: cannot open: /etc/target
> [ 29.035870][ T1] =====================================================
> [ 29.036118][ T1] BUG: KMSAN: use-after-free in __list_del_entry_valid_or_report+0x19e/0x490
> [ 29.036138][ T1] __list_del_entry_valid_or_report+0x19e/0x490
> [ 29.036138][ T1] stack_depot_save_flags+0x3e7/0x7b0
> [ 29.036138][ T1] stack_depot_save+0x12/0x20
> [ 29.036138][ T1] ref_tracker_alloc+0x215/0x700
> [ 29.036138][ T1] netdev_hold+0xe2/0x120
> [ 29.036138][ T1] register_netdevice+0x1bc7/0x2170
> [ 29.036138][ T1] bond_create+0x138/0x2a0
> [ 29.036138][ T1] bonding_init+0x1a7/0x2d0
> [ 29.036138][ T1] do_one_initcall+0x216/0x960
> [ 29.036138][ T1] do_initcall_level+0x140/0x350
> [ 29.036138][ T1] do_initcalls+0xf0/0x1d0
> [ 29.036138][ T1] do_basic_setup+0x22/0x30
> [ 29.036138][ T1] kernel_init_freeable+0x300/0x4b0
> [ 29.036138][ T1] kernel_init+0x2f/0x7e0
> [ 29.036138][ T1] ret_from_fork+0x66/0x80
> [ 29.036138][ T1] ret_from_fork_asm+0x11/0x20
> [ 29.036138][ T1]
> [ 29.036138][ T1] Uninit was created at:
> [ 29.036138][ T1] free_unref_page_prepare+0xc1/0xad0
> [ 29.036138][ T1] free_unref_page+0x58/0x6d0
> [ 29.036138][ T1] __free_pages+0xb1/0x1f0
> [ 29.036138][ T1] thread_stack_free_rcu+0x97/0xb0
> [ 29.036138][ T1] rcu_core+0xa3c/0x1df0
> [ 29.036138][ T1] rcu_core_si+0x12/0x20
> [ 29.036138][ T1] __do_softirq+0x1b7/0x7c3
> [ 29.036138][ T1]
> [ 29.036138][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.8.0-rc2-syzkaller-g6764c317b6bb #0
> [ 29.036138][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
> [ 29.036138][ T1] =====================================================
> [ 29.036138][ T1] Disabling lock debugging due to kernel taint
> [ 29.036138][ T1] Kernel panic - not syncing: kmsan.panic set ...
> [ 29.036138][ T1] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G B 6.8.0-rc2-syzkaller-g6764c317b6bb #0
> [ 29.036138][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
> [ 29.036138][ T1] Call Trace:
> [ 29.036138][ T1] <TASK>
> [ 29.036138][ T1] dump_stack_lvl+0x1bf/0x240
> [ 29.036138][ T1] dump_stack+0x1e/0x20
> [ 29.036138][ T1] panic+0x4de/0xc90
> [ 29.036138][ T1] kmsan_report+0x2d0/0x2d0
> [ 29.036138][ T1] ? cleanup_uevent_env+0x30/0x50
> [ 29.036138][ T1] ? netdev_queue_update_kobjects+0x3f5/0x870
> [ 29.036138][ T1] ? netdev_register_kobject+0x41e/0x520
> [ 29.036138][ T1] ? register_netdevice+0x198f/0x2170
> [ 29.036138][ T1] ? __msan_warning+0x96/0x110
> [ 29.036138][ T1] ? __list_del_entry_valid_or_report+0x19e/0x490
> [ 29.036138][ T1] ? stack_depot_save_flags+0x3e7/0x7b0
> [ 29.036138][ T1] ? stack_depot_save+0x12/0x20
> [ 29.036138][ T1] ? ref_tracker_alloc+0x215/0x700
> [ 29.036138][ T1] ? netdev_hold+0xe2/0x120
> [ 29.036138][ T1] ? register_netdevice+0x1bc7/0x2170
> [ 29.036138][ T1] ? bond_create+0x138/0x2a0
> [ 29.036138][ T1] ? bonding_init+0x1a7/0x2d0
> [ 29.036138][ T1] ? do_one_initcall+0x216/0x960
> [ 29.036138][ T1] ? do_initcall_level+0x140/0x350
> [ 29.036138][ T1] ? do_initcalls+0xf0/0x1d0
> [ 29.036138][ T1] ? do_basic_setup+0x22/0x30
> [ 29.036138][ T1] ? kernel_init_freeable+0x300/0x4b0
> [ 29.036138][ T1] ? kernel_init+0x2f/0x7e0
> [ 29.036138][ T1] ? ret_from_fork+0x66/0x80
> [ 29.036138][ T1] ? ret_from_fork_asm+0x11/0x20
> [ 29.036138][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
> [ 29.036138][ T1] ? kmsan_get_metadata+0x146/0x1c0
> [ 29.036138][ T1] ? kmsan_get_metadata+0x146/0x1c0
> [ 29.036138][ T1] ? kmsan_get_metadata+0x146/0x1c0
> [ 29.036138][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
> [ 29.036138][ T1] ? filter_irq_stacks+0x60/0x1a0
> [ 29.036138][ T1] ? stack_depot_save_flags+0x2c/0x7b0
> [ 29.036138][ T1] ? kmsan_get_metadata+0x146/0x1c0
> [ 29.036138][ T1] ? kmsan_get_metadata+0x146/0x1c0
> [ 29.036138][ T1] ? kmsan_get_metadata+0x146/0x1c0
> [ 29.036138][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
> [ 29.036138][ T1] __msan_warning+0x96/0x110
> [ 29.036138][ T1] __list_del_entry_valid_or_report+0x19e/0x490
> [ 29.036138][ T1] stack_depot_save_flags+0x3e7/0x7b0
> [ 29.036138][ T1] stack_depot_save+0x12/0x20
> [ 29.036138][ T1] ref_tracker_alloc+0x215/0x700
> [ 29.036138][ T1] ? kmsan_get_metadata+0x146/0x1c0
> [ 29.036138][ T1] ? netdev_hold+0xe2/0x120
> [ 29.036138][ T1] ? register_netdevice+0x1bc7/0x2170
> [ 29.036138][ T1] ? bond_create+0x138/0x2a0
> [ 29.036138][ T1] ? bonding_init+0x1a7/0x2d0
> [ 29.036138][ T1] ? do_one_initcall+0x216/0x960
> [ 29.036138][ T1] ? do_initcall_level+0x140/0x350
> [ 29.036138][ T1] ? do_initcalls+0xf0/0x1d0
> [ 29.036138][ T1] ? do_basic_setup+0x22/0x30
> [ 29.036138][ T1] ? kernel_init_freeable+0x300/0x4b0
> [ 29.036138][ T1] ? kernel_init+0x2f/0x7e0
> [ 29.036138][ T1] ? ret_from_fork+0x66/0x80
> [ 29.036138][ T1] ? ret_from_fork_asm+0x11/0x20
> [ 29.036138][ T1] ? kmsan_internal_unpoison_memory+0x14/0x20
> [ 29.036138][ T1] netdev_hold+0xe2/0x120
> [ 29.036138][ T1] register_netdevice+0x1bc7/0x2170
> [ 29.036138][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
> [ 29.036138][ T1] bond_create+0x138/0x2a0
> [ 29.036138][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
> [ 29.036138][ T1] bonding_init+0x1a7/0x2d0
> [ 29.036138][ T1] ? spi_dln2_driver_init+0x40/0x40
> [ 29.036138][ T1] do_one_initcall+0x216/0x960
> [ 29.036138][ T1] ? spi_dln2_driver_init+0x40/0x40
> [ 29.036138][ T1] ? kmsan_get_metadata+0x60/0x1c0
> [ 29.036138][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
> [ 29.036138][ T1] ? filter_irq_stacks+0x60/0x1a0
> [ 29.036138][ T1] ? stack_depot_save_flags+0x2c/0x7b0
> [ 29.036138][ T1] ? skip_spaces+0x8f/0xc0
> [ 29.036138][ T1] ? kmsan_get_metadata+0x146/0x1c0
> [ 29.036138][ T1] ? kmsan_get_metadata+0x146/0x1c0
> [ 29.036138][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
> [ 29.036138][ T1] ? kmsan_get_metadata+0x146/0x1c0
> [ 29.036138][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
> [ 29.036138][ T1] ? parse_args+0x1511/0x15e0
> [ 29.036138][ T1] ? kmsan_get_metadata+0x146/0x1c0
> [ 29.036138][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
> [ 29.036138][ T1] ? spi_dln2_driver_init+0x40/0x40
> [ 29.036138][ T1] do_initcall_level+0x140/0x350
> [ 29.036138][ T1] do_initcalls+0xf0/0x1d0
> [ 29.036138][ T1] ? arch_cpuhp_init_parallel_bringup+0xe0/0xe0
> [ 29.036138][ T1] do_basic_setup+0x22/0x30
> [ 29.036138][ T1] kernel_init_freeable+0x300/0x4b0
> [ 29.036138][ T1] ? rest_init+0x260/0x260
> [ 29.036138][ T1] kernel_init+0x2f/0x7e0
> [ 29.036138][ T1] ? rest_init+0x260/0x260
> [ 29.036138][ T1] ret_from_fork+0x66/0x80
> [ 29.036138][ T1] ? rest_init+0x260/0x260
> [ 29.036138][ T1] ret_from_fork_asm+0x11/0x20
> [ 29.036138][ T1] </TASK>
> [ 29.036138][ T1] Kernel Offset: disabled
>
>
> 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='go1.21.4'
> 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-build2170902610=/tmp/go-build -gno-record-gcc-switches'
>
> git status (err=<nil>)
> HEAD detached at 373b66cd2
> 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=373b66cd2ba1fd05c72d0bbe16141fb287fe2eb3 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240130-131205'" "-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=373b66cd2ba1fd05c72d0bbe16141fb287fe2eb3 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240130-131205'" "-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=373b66cd2ba1fd05c72d0bbe16141fb287fe2eb3 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240130-131205'" "-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 -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -fpermissive -w -DGOOS_linux=1 -DGOARCH_amd64=1 \
> -DHOSTGOOS_linux=1 -DGIT_REVISION=\"373b66cd2ba1fd05c72d0bbe16141fb287fe2eb3\"
>
>
> Error text is too large and was truncated, full error text is at:
> https://syzkaller.appspot.com/x/error.txt?x=12b5bad3e80000
>
>
> Tested on:
>
> commit: 6764c317 Merge tag 'scsi-fixes' of git://git.kernel.or..
> git tree: upstream
> kernel config: https://syzkaller.appspot.com/x/.config?x=f8b2756f2e75608e
> dashboard link: https://syzkaller.appspot.com/bug?extid=88ad8b0517a9d3bb9dc8
> compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
>
> Note: no patches were applied.
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