Re: [syzbot] [input?] [usb?] KMSAN: uninit-value in asus_report_fixup

syzbot
2024-05-28T05:46:09Z

Hello,

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

sert=on, ref-verify=on, zoned=yes, fsverity=yes
[ 50.230614][ T1] Key type encrypted registered
[ 50.235891][ T1] AppArmor: AppArmor sha256 policy hashing enabled
[ 50.242800][ T1] ima: No TPM chip found, activating TPM-bypass!
[ 50.249865][ T1] Loading compiled-in module X.509 certificates
[ 50.292391][ T1] Loaded X.509 cert 'Build time autogenerated kernel key: 2ef82123926fa34f508acba9911fce577bb4fe8a'
[ 50.303920][ T1] ima: Allocated hash algorithm: sha256
[ 50.310144][ T1] ima: No architecture policies found
[ 50.316925][ T1] evm: Initialising EVM extended attributes:
[ 50.322973][ T1] evm: security.selinux (disabled)
[ 50.328526][ T1] evm: security.SMACK64 (disabled)
[ 50.334013][ T1] evm: security.SMACK64EXEC (disabled)
[ 50.339602][ T1] evm: security.SMACK64TRANSMUTE (disabled)
[ 50.345640][ T1] evm: security.SMACK64MMAP (disabled)
[ 50.351386][ T1] evm: security.apparmor
[ 50.355851][ T1] evm: security.ima
[ 50.359745][ T1] evm: security.capability
[ 50.364417][ T1] evm: HMAC attrs: 0x1
[ 50.373466][ T1] PM: Magic number: 8:208:619
[ 50.379889][ T1] usb usb14-port4: hash matches
[ 50.386279][ T1] net ifb0: hash matches
[ 50.391057][ T1] tty ptye9: hash matches
[ 50.396054][ T1] tty ptybc: hash matches
[ 50.401524][ T1] printk: legacy console [netcon0] enabled
[ 50.407774][ T1] netconsole: network logging started
[ 50.414999][ T1] gtp: GTP module loaded (pdp ctx size 128 bytes)
[ 50.424381][ T1] rdma_rxe: loaded
[ 50.430039][ T1] cfg80211: Loading compiled-in X.509 certificates for regulatory database
[ 50.451536][ T1] Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
[ 50.469189][ T1] Loaded X.509 cert 'wens: 61c038651aabdcf94bd0ac7ff06c7248db18c600'
[ 50.477773][ T1] clk: Disabling unused clocks
[ 50.482816][ T1] ALSA device list:
[ 50.486809][ T1] #0: Dummy 1
[ 50.490724][ T1] #1: Loopback 1
[ 50.494616][ T1] #2: Virtual MIDI Card 1
[ 50.505678][ T10] platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
[ 50.506128][ T1] md: Waiting for all devices to be available before autodetect
[ 50.517296][ T10] platform regulatory.0: Falling back to sysfs fallback for: regulatory.db
[ 50.524217][ T1] md: If you don't use raid, use raid=noautodetect
[ 50.540178][ T1] md: Autodetecting RAID arrays.
[ 50.545383][ T1] md: autorun ...
[ 50.549388][ T1] md: ... autorun DONE.
[ 50.671837][ T1] EXT4-fs (sda1): mounted filesystem 5941fea2-f5fa-4b4e-b5ef-9af118b27b95 ro with ordered data mode. Quota mode: none.
[ 50.685698][ T1] VFS: Mounted root (ext4 filesystem) readonly on device 8:1.
[ 50.779387][ T1] devtmpfs: mounted
[ 51.037410][ T1] Freeing unused kernel image (initmem) memory: 37032K
[ 51.049223][ T1] Write protecting the kernel read-only data: 262144k
[ 51.096766][ T1] Freeing unused kernel image (rodata/data gap) memory: 1808K
[ 52.746982][ T1] x86/mm: Checked W+X mappings: passed, no W+X pages found.
[ 52.757511][ T1] x86/mm: Checking user space page tables
[ 54.254031][ T1] x86/mm: Checked W+X mappings: passed, no W+X pages found.
[ 54.263213][ T1] Failed to set sysctl parameter 'kernel.hung_task_all_cpu_backtrace=1': parameter not found
[ 54.285036][ T1] Failed to set sysctl parameter 'max_rcu_stall_to_panic=1': parameter not found
[ 54.296902][ T1] Run /sbin/init as init process
[ 55.866548][ T4446] mount (4446) used greatest stack depth: 8144 bytes left
[ 55.941342][ T4447] EXT4-fs (sda1): re-mounted 5941fea2-f5fa-4b4e-b5ef-9af118b27b95 r/w. Quota mode: none.
mount: mounting smackfs on /sys/fs/smackfs failed: No such file or directory
mount: mounting selinuxfs on /sys/fs/selinux failed: No such file or directory
[ 56.283370][ T4450] mount (4450) used greatest stack depth: 5568 bytes left
Starting syslogd: OK
Starting acpid: OK
Starting klogd: OK
Running sysctl: OK
Populating /dev using udev: [ 60.169672][ T4480] udevd[4480]: starting version 3.2.11
[ 63.755909][ T4481] udevd[4481]: starting eudev-3.2.11
[ 63.769352][ T4480] udevd (4480) used greatest stack depth: 5272 bytes left
done
Starting system message bus: done
Starting iptables: OK
Starting network: OK
Starting dhcpcd...
dhcpcd-9.4.1 starting
dev: loaded udev
DUID 00:04:c7:fd:4a:df:9d:a6:e9:60:55:7b:b4:5b:1f:77:00:5c
forked to background, child pid 4693
[ 111.458895][ T4694] 8021q: adding VLAN 0 to HW filter on device bond0
[ 111.496440][ T4694] eql: remember to turn off Van-Jacobson compression on your slave devices
[ 111.697880][ T10] cfg80211: failed to load regulatory.db
Starting sshd: [ 113.751142][ T4779] sshd (4779) used greatest stack depth: 4720 bytes left
[ 113.792885][ C0] =====================================================
[ 113.800595][ C0] BUG: KMSAN: uninit-value in receive_buf+0x25e3/0x5fd0
[ 113.807866][ C0] receive_buf+0x25e3/0x5fd0
[ 113.812660][ C0] virtnet_poll+0xd1c/0x23c0
[ 113.817511][ C0] __napi_poll+0xe7/0x980
[ 113.822060][ C0] net_rx_action+0x82a/0x1850
[ 113.827121][ C0] handle_softirqs+0x1ce/0x800
[ 113.832171][ C0] __irq_exit_rcu+0x68/0x120
[ 113.837029][ C0] irq_exit_rcu+0x12/0x20
[ 113.841544][ C0] common_interrupt+0x94/0xa0
[ 113.846507][ C0] asm_common_interrupt+0x2b/0x40
[ 113.851825][ C0] kmsan_internal_set_shadow_origin+0x76/0xe0
[ 113.858320][ C0] kmsan_internal_unpoison_memory+0x14/0x20
[ 113.864659][ C0] kmsan_unpoison_memory+0x28/0x40
[ 113.869970][ C0] prep_new_page+0x115/0x540
[ 113.874876][ C0] get_page_from_freelist+0x1578/0x15f0
[ 113.880730][ C0] __alloc_pages_noprof+0x8a7/0xe70
[ 113.886250][ C0] alloc_pages_mpol_noprof+0x299/0x990
[ 113.892181][ C0] vma_alloc_folio_noprof+0x412/0x750
[ 113.898206][ C0] handle_mm_fault+0x907c/0xe610
[ 113.903457][ C0] exc_page_fault+0x41b/0x700
[ 113.908439][ C0] asm_exc_page_fault+0x2b/0x30
[ 113.913577][ C0]
[ 113.916067][ C0] Uninit was created at:
OK[ 113.920879][ C0] __alloc_pages_noprof+0x9d6/0xe70

[ 113.926417][ C0] alloc_pages_mpol_noprof+0x299/0x990
[ 113.932200][ C0] alloc_pages_noprof+0x1bf/0x1e0
[ 113.937655][ C0] skb_page_frag_refill+0x2bf/0x7c0
[ 113.943288][ C0] virtnet_rq_alloc+0x43/0xbb0
[ 113.948380][ C0] try_fill_recv+0x3f0/0x2f50
[ 113.953224][ C0] virtnet_open+0x1cc/0xb00
[ 113.958077][ C0] __dev_open+0x546/0x6f0
[ 113.962708][ C0] __dev_change_flags+0x309/0x9a0
[ 113.968302][ C0] dev_change_flags+0x8e/0x1d0
[ 113.973240][ C0] devinet_ioctl+0x13ec/0x22c0
[ 113.978437][ C0] inet_ioctl+0x4bd/0x6d0
[ 113.983181][ C0] sock_do_ioctl+0xb7/0x540
[ 113.987928][ C0] sock_ioctl+0x727/0xd70
[ 113.992433][ C0] __se_sys_ioctl+0x261/0x450
[ 113.997393][ C0] __x64_sys_ioctl+0x96/0xe0
[ 114.002313][ C0] x64_sys_call+0x18c0/0x3b90
[ 114.007248][ C0] do_syscall_64+0xcd/0x1e0
[ 114.011927][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 114.018164][ C0]
[ 114.020697][ C0] CPU: 0 PID: 4786 Comm: rm Not tainted 6.10.0-rc1-syzkaller-00013-g2bfcfd584ff5-dirty #0
[ 114.031264][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
[ 114.041826][ C0] =====================================================
[ 114.049359][ C0] Disabling lock debugging due to kernel taint
[ 114.055708][ C0] Kernel panic - not syncing: kmsan.panic set ...
[ 114.062795][ C0] CPU: 0 PID: 4786 Comm: rm Tainted: G B 6.10.0-rc1-syzkaller-00013-g2bfcfd584ff5-dirty #0
[ 114.075000][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
[ 114.085286][ C0] Call Trace:
[ 114.088865][ C0] <IRQ>
[ 114.091913][ C0] dump_stack_lvl+0x216/0x2d0
[ 114.096785][ C0] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0
[ 114.102924][ C0] dump_stack+0x1e/0x30
[ 114.107269][ C0] panic+0x4e2/0xcd0
[ 114.111426][ C0] ? kmsan_get_metadata+0x111/0x1d0
[ 114.116837][ C0] kmsan_report+0x2d5/0x2e0
[ 114.121549][ C0] ? kmsan_alloc_page+0x182/0x220
[ 114.126772][ C0] ? kmsan_get_metadata+0x146/0x1d0
[ 114.132180][ C0] ? __msan_warning+0x95/0x120
[ 114.137205][ C0] ? receive_buf+0x25e3/0x5fd0
[ 114.142074][ C0] ? virtnet_poll+0xd1c/0x23c0
[ 114.147049][ C0] ? __napi_poll+0xe7/0x980
[ 114.151760][ C0] ? net_rx_action+0x82a/0x1850
[ 114.156910][ C0] ? handle_softirqs+0x1ce/0x800
[ 114.161958][ C0] ? __irq_exit_rcu+0x68/0x120
[ 114.166911][ C0] ? irq_exit_rcu+0x12/0x20
[ 114.171601][ C0] ? common_interrupt+0x94/0xa0
[ 114.176565][ C0] ? asm_common_interrupt+0x2b/0x40
[ 114.181863][ C0] ? kmsan_internal_set_shadow_origin+0x76/0xe0
[ 114.188207][ C0] ? kmsan_internal_unpoison_memory+0x14/0x20
[ 114.194391][ C0] ? kmsan_unpoison_memory+0x28/0x40
[ 114.199793][ C0] ? prep_new_page+0x115/0x540
[ 114.204666][ C0] ? get_page_from_freelist+0x1578/0x15f0
[ 114.210579][ C0] ? __alloc_pages_noprof+0x8a7/0xe70
[ 114.216060][ C0] ? alloc_pages_mpol_noprof+0x299/0x990
[ 114.221983][ C0] ? vma_alloc_folio_noprof+0x412/0x750
[ 114.227836][ C0] ? handle_mm_fault+0x907c/0xe610
[ 114.233178][ C0] ? exc_page_fault+0x41b/0x700

[ 114.238164][ C0] ? asm_exc_page_fault+0x2b/0x30
[ 114.243578][ C0] ? kmsan_internal_memmove_metadata+0x17b/0x230
syzkaller[ 114.250182][ C0] ? kmsan_get_metadata+0x146/0x1d0

[ 114.256633][ C0] ? kmsan_get_metadata+0x146/0x1d0
[ 114.262332][ C0] ? page_to_skb+0xdae/0x1620
[ 114.267233][ C0] __msan_warning+0x95/0x120
[ 114.272275][ C0] receive_buf+0x25e3/0x5fd0
[ 114.277094][ C0] ? kmsan_get_metadata+0x146/0x1d0
[ 114.282402][ C0] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0
[ 114.288519][ C0] virtnet_poll+0xd1c/0x23c0
[ 114.293235][ C0] ? __pfx_virtnet_poll+0x10/0x10
[ 114.298573][ C0] __napi_poll+0xe7/0x980
[ 114.303042][ C0] ? kmsan_get_metadata+0x146/0x1d0
[ 114.308529][ C0] net_rx_action+0x82a/0x1850
[ 114.313443][ C0] ? sched_clock_cpu+0x55/0x870
[ 114.318434][ C0] ? __pfx_net_rx_action+0x10/0x10
[ 114.323766][ C0] handle_softirqs+0x1ce/0x800
[ 114.328788][ C0] __irq_exit_rcu+0x68/0x120
[ 114.333488][ C0] irq_exit_rcu+0x12/0x20
[ 114.337976][ C0] common_interrupt+0x94/0xa0
[ 114.343068][ C0] </IRQ>
[ 114.346080][ C0] <TASK>
[ 114.349188][ C0] asm_common_interrupt+0x2b/0x40
[ 114.354554][ C0] RIP: 0010:kmsan_internal_set_shadow_origin+0x76/0xe0
[ 114.361736][ C0] Code: f0 83 e0 03 49 83 e6 fc 49 8d 5c 07 03 4c 89 f7 be 01 00 00 00 e8 3a 35 00 00 48 83 fb 04 72 1a 48 c1 eb 02 31 c9 44 89 2c 88 <ff> c1 48 63 c9 48 39 cb 77 f2 eb 04 84 db 75 0f 5b 41 5c 41 5d 41
[ 114.382246][ C0] RSP: 0000:ffff88812094b8b0 EFLAGS: 00000216
[ 114.388520][ C0] RAX: ffff8881212ed000 RBX: 0000000000000400 RCX: 000000000000019b
[ 114.396599][ C0] RDX: 00000001216ed000 RSI: ffff88813fff9240 RDI: ffff8881216ed000
[ 114.404856][ C0] RBP: ffff88812094b8d8 R08: ffffea000000000f R09: 0000000000000000
[ 114.413096][ C0] R10: ffff888120eed000 R11: 0000000000000004 R12: 0000000000000000
[ 114.421164][ C0] R13: 0000000000000000 R14: ffff8881216ed000 R15: 0000000000001000
[ 114.429361][ C0] kmsan_internal_unpoison_memory+0x14/0x20
[ 114.435481][ C0] kmsan_unpoison_memory+0x28/0x40
[ 114.441106][ C0] prep_new_page+0x115/0x540
[ 114.445833][ C0] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0
[ 114.451866][ C0] get_page_from_freelist+0x1578/0x15f0
[ 114.457804][ C0] __alloc_pages_noprof+0x8a7/0xe70
[ 114.463144][ C0] alloc_pages_mpol_noprof+0x299/0x990
[ 114.469050][ C0] ? kmsan_get_metadata+0x146/0x1d0
[ 114.474479][ C0] vma_alloc_folio_noprof+0x412/0x750
[ 114.480070][ C0] ? kmsan_get_metadata+0x146/0x1d0
[ 114.485509][ C0] handle_mm_fault+0x907c/0xe610
[ 114.491145][ C0] ? kmsan_get_metadata+0x146/0x1d0
[ 114.496501][ C0] ? kmsan_get_metadata+0x146/0x1d0
[ 114.501877][ C0] exc_page_fault+0x41b/0x700
[ 114.506694][ C0] asm_exc_page_fault+0x2b/0x30
[ 114.511959][ C0] RIP: 0033:0x7fbc8aec8b9d
[ 114.517011][ C0] Code: 8b 90 c8 01 00 00 48 81 e2 00 ff ff ff 7e 14 48 89 d1 48 89 15 94 e6 10 00 48 d1 f9 48 89 0d 92 e6 10 00 48 8b 90 d0 01 00 00 <48> 89 15 24 58 11 00 48 8b 90 d8 01 00 00 48 89 15 66 e6 10 00 48
[ 114.536844][ C0] RSP: 002b:00007fffd2152068 EFLAGS: 00010206
[ 114.543432][ C0] RAX: 00007fbc8b0dfa80 RBX: 00007fbc8ae35000 RCX: 0000000000dc0000
[ 114.551697][ C0] RDX: 00000000014a0000 RSI: 00007fbc8ae53540 RDI: 0000000000000000
[ 114.559908][ C0] RBP: 00007fffd2152170 R08: 00007fffd2150000 R09: 00007fbc8b0e0ab0
[ 114.568160][ C0] R10: 00007fbc8ae39ab8 R11: 0000000000000025 R12: 00007fbc8b0a95c0
[ 114.576260][ C0] R13: 00007fbc8b0d4eda R14: 00007fbc8afd68c8 R15: 00007fbc8ae39ab8
[ 114.584358][ C0] </TASK>
[ 114.587837][ C0] Kernel Offset: disabled
[ 114.592358][ C0] Rebooting in 86400 seconds..

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-build1371669175=/tmp/go-build -gno-record-gcc-switches'

git status (err=<nil>)
HEAD detached at c0f1611a3
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
touch .descriptions
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=c0f1611a36d66bb0bb8e2f294b97fb685bfc5f9c -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240517-125934'" "-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=c0f1611a36d66bb0bb8e2f294b97fb685bfc5f9c -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240517-125934'" "-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
gcc -o ./bin/linux_amd64/syz-executor executor/executor.cc \
-m64 -std=c++11 -I. -Iexecutor/_include -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=\"c0f1611a36d66bb0bb8e2f294b97fb685bfc5f9c\"

Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=15a9822c980000

Tested on:

commit: 2bfcfd58 Merge tag 'pmdomain-v6.10-rc1' of git://git.k..
git tree: upstream
kernel config: https://syzkaller.appspot.com/x/.config?x=54d66e52f38a45d8
dashboard link: https://syzkaller.appspot.com/bug?extid=07762f019fd03d01f04c
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=1425c62c980000