Re: [syzbot] [net?] [nfc?] KMSAN: uninit-value in nci_rx_work
From: syzbot
Date: Sun May 19 2024 - 03:06:14 EST
Hello,
syzbot tried to test the proposed patch but the build/boot failed:
d
[ 49.833473][ T1] Key type fscrypt-provisioning registered
[ 49.840611][ T1] kAFS: Red Hat AFS client v0.1 registering.
[ 49.871444][ T1] Btrfs loaded, assert=on, ref-verify=on, zoned=yes, fsverity=yes
[ 49.899097][ T1] Key type encrypted registered
[ 49.904196][ T1] AppArmor: AppArmor sha256 policy hashing enabled
[ 49.911103][ T1] ima: No TPM chip found, activating TPM-bypass!
[ 49.918186][ T1] Loading compiled-in module X.509 certificates
[ 49.958925][ T1] Loaded X.509 cert 'Build time autogenerated kernel key: a4798651021c2e94b01e09517f19b030d6efdca0'
[ 49.972127][ T1] ima: Allocated hash algorithm: sha256
[ 49.978232][ T1] ima: No architecture policies found
[ 49.984979][ T1] evm: Initialising EVM extended attributes:
[ 49.991015][ T1] evm: security.selinux (disabled)
[ 49.996257][ T1] evm: security.SMACK64 (disabled)
[ 50.001522][ T1] evm: security.SMACK64EXEC (disabled)
[ 50.007098][ T1] evm: security.SMACK64TRANSMUTE (disabled)
[ 50.013294][ T1] evm: security.SMACK64MMAP (disabled)
[ 50.018826][ T1] evm: security.apparmor
[ 50.023190][ T1] evm: security.ima
[ 50.027058][ T1] evm: security.capability
[ 50.031546][ T1] evm: HMAC attrs: 0x1
[ 50.040411][ T1] PM: Magic number: 8:498:974
[ 50.045711][ T1] net rose12: hash matches
[ 50.051619][ T1] tty ttyc1: hash matches
[ 50.057624][ T1] memory memory21: hash matches
[ 50.063084][ T1] printk: legacy console [netcon0] enabled
[ 50.069642][ T1] netconsole: network logging started
[ 50.076563][ T1] gtp: GTP module loaded (pdp ctx size 128 bytes)
[ 50.085358][ T1] rdma_rxe: loaded
[ 50.091037][ T1] cfg80211: Loading compiled-in X.509 certificates for regulatory database
[ 50.112091][ T1] Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
[ 50.129871][ T1] Loaded X.509 cert 'wens: 61c038651aabdcf94bd0ac7ff06c7248db18c600'
[ 50.138379][ T1] clk: Disabling unused clocks
[ 50.143379][ T1] ALSA device list:
[ 50.147270][ T1] #0: Dummy 1
[ 50.150844][ T1] #1: Loopback 1
[ 50.154858][ T1] #2: Virtual MIDI Card 1
[ 50.165056][ T10] platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
[ 50.175016][ T10] platform regulatory.0: Falling back to sysfs fallback for: regulatory.db
[ 50.187170][ T1] md: Waiting for all devices to be available before autodetect
[ 50.195642][ T1] md: If you don't use raid, use raid=noautodetect
[ 50.202700][ T1] md: Autodetecting RAID arrays.
[ 50.207733][ T1] md: autorun ...
[ 50.211457][ T1] md: ... autorun DONE.
[ 50.353528][ T1] EXT4-fs (sda1): mounted filesystem 5941fea2-f5fa-4b4e-b5ef-9af118b27b95 ro with ordered data mode. Quota mode: none.
[ 50.366915][ T1] VFS: Mounted root (ext4 filesystem) readonly on device 8:1.
[ 50.424949][ T1] devtmpfs: mounted
[ 50.699460][ T1] Freeing unused kernel image (initmem) memory: 37080K
[ 50.711336][ T1] Write protecting the kernel read-only data: 262144k
[ 50.758319][ T1] Freeing unused kernel image (rodata/data gap) memory: 1828K
[ 52.395352][ T1] x86/mm: Checked W+X mappings: passed, no W+X pages found.
[ 52.405685][ T1] x86/mm: Checking user space page tables
[ 53.902901][ T1] x86/mm: Checked W+X mappings: passed, no W+X pages found.
[ 53.912063][ T1] Failed to set sysctl parameter 'kernel.hung_task_all_cpu_backtrace=1': parameter not found
[ 53.933254][ T1] Failed to set sysctl parameter 'max_rcu_stall_to_panic=1': parameter not found
[ 53.945343][ T1] Run /sbin/init as init process
[ 55.451627][ T4457] mount (4457) used greatest stack depth: 8080 bytes left
[ 55.544800][ T4458] 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
[ 55.887872][ T4461] mount (4461) used greatest stack depth: 5536 bytes left
Starting syslogd: OK
Starting acpid: OK
Starting klogd: OK
Running sysctl: OK
Populating /dev using udev: [ 59.736174][ T4491] udevd[4491]: starting version 3.2.11
[ 63.326118][ T4492] udevd[4492]: starting eudev-3.2.11
[ 63.339616][ T4491] udevd (4491) used greatest stack depth: 5296 bytes left
[ 96.282221][ T1217] net_ratelimit: 2 callbacks suppressed
[ 96.288457][ T1217] aoe: packet could not be sent on lo. consider increasing tx_queue_len
[ 96.297759][ T1217] aoe: packet could not be sent on bond0. consider increasing tx_queue_len
[ 96.306994][ T1217] aoe: packet could not be sent on dummy0. consider increasing tx_queue_len
[ 96.316324][ T1217] aoe: packet could not be sent on eql. consider increasing tx_queue_len
[ 96.325251][ T1217] aoe: packet could not be sent on ifb0. consider increasing tx_queue_len
[ 96.334334][ T1217] aoe: packet could not be sent on ifb1. consider increasing tx_queue_len
[ 96.343322][ T1217] aoe: packet could not be sent on eth0. consider increasing tx_queue_len
[ 96.352454][ T1217] aoe: packet could not be sent on wlan0. consider increasing tx_queue_len
[ 96.361456][ T1217] aoe: packet could not be sent on wlan1. consider increasing tx_queue_len
[ 96.370791][ T1217] aoe: packet could not be sent on hwsim0. consider increasing tx_queue_len
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:ee:6e:2e:e3:62:a1:1e:1b:9d:a6:87:1c:6e:7e:27:0f
forked to background, child pid 4705
[ 111.221467][ T4706] 8021q: adding VLAN 0 to HW filter on device bond0
[ 111.265683][ T4706] eql: remember to turn off Van-Jacobson compression on your slave devices
[ 111.628301][ T10] cfg80211: failed to load regulatory.db
Starting sshd: OK
syzkaller
syzkaller login: [ 114.143712][ C0] =====================================================
[ 114.151005][ C0] BUG: KMSAN: uninit-value in receive_buf+0x25e3/0x5fd0
[ 114.158338][ C0] receive_buf+0x25e3/0x5fd0
[ 114.163226][ C0] virtnet_poll+0xd1c/0x23c0
[ 114.168041][ C0] __napi_poll+0xe7/0x980
[ 114.172623][ C0] net_rx_action+0x82a/0x1850
[ 114.177758][ C0] handle_softirqs+0x1d8/0x810
[ 114.182781][ C0] __irq_exit_rcu+0x68/0x120
[ 114.187568][ C0] irq_exit_rcu+0x12/0x20
[ 114.192171][ C0] common_interrupt+0x94/0xa0
[ 114.197187][ C0] asm_common_interrupt+0x2b/0x40
[ 114.202485][ C0] acpi_safe_halt+0x25/0x30
[ 114.207199][ C0] acpi_idle_do_entry+0x22/0x40
[ 114.212502][ C0] acpi_idle_enter+0xa1/0xc0
[ 114.217275][ C0] cpuidle_enter_state+0xcb/0x250
[ 114.222538][ C0] cpuidle_enter+0x7f/0xf0
[ 114.227114][ C0] do_idle+0x551/0x750
[ 114.231384][ C0] cpu_startup_entry+0x65/0x80
[ 114.236432][ C0] rest_init+0x1e8/0x260
[ 114.240862][ C0] start_kernel+0x927/0xa70
[ 114.245558][ C0] x86_64_start_reservations+0x2e/0x30
[ 114.251188][ C0] x86_64_start_kernel+0x98/0xa0
[ 114.257089][ C0] common_startup_64+0x12c/0x137
[ 114.262194][ C0]
[ 114.264659][ C0] Uninit was created at:
[ 114.269028][ C0] __alloc_pages+0x9d6/0xe70
[ 114.273784][ C0] alloc_pages_mpol+0x299/0x990
[ 114.278842][ C0] alloc_pages+0x1bf/0x1e0
[ 114.283456][ C0] skb_page_frag_refill+0x2bf/0x7c0
[ 114.288835][ C0] virtnet_rq_alloc+0x43/0xbb0
[ 114.293812][ C0] try_fill_recv+0x3f0/0x2f50
[ 114.298693][ C0] virtnet_open+0x1cc/0xb00
[ 114.303390][ C0] __dev_open+0x546/0x6f0
[ 114.307892][ C0] __dev_change_flags+0x309/0x9a0
[ 114.313123][ C0] dev_change_flags+0x8e/0x1d0
[ 114.318070][ C0] devinet_ioctl+0x13ec/0x22c0
[ 114.323032][ C0] inet_ioctl+0x4bd/0x6d0
[ 114.327536][ C0] sock_do_ioctl+0xb7/0x540
[ 114.332144][ C0] sock_ioctl+0x727/0xd70
[ 114.336671][ C0] __se_sys_ioctl+0x261/0x450
[ 114.341481][ C0] __x64_sys_ioctl+0x96/0xe0
[ 114.346265][ C0] x64_sys_call+0x1883/0x3b50
[ 114.351150][ C0] do_syscall_64+0xcf/0x1e0
[ 114.355849][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 114.361963][ C0]
[ 114.364413][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.9.0-syzkaller-08544-g4b377b4868ef-dirty #0
[ 114.374429][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
[ 114.385301][ C0] =====================================================
[ 114.392482][ C0] Disabling lock debugging due to kernel taint
[ 114.398789][ C0] Kernel panic - not syncing: kmsan.panic set ...
[ 114.405265][ C0] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G B 6.9.0-syzkaller-08544-g4b377b4868ef-dirty #0
[ 114.416655][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
[ 114.426788][ C0] Call Trace:
[ 114.430125][ C0] <IRQ>
[ 114.433020][ C0] dump_stack_lvl+0x216/0x2d0
[ 114.437823][ C0] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0
[ 114.443852][ C0] dump_stack+0x1e/0x30
[ 114.448123][ C0] panic+0x4e2/0xcd0
[ 114.452123][ C0] ? kmsan_get_metadata+0x91/0x1d0
[ 114.457373][ C0] kmsan_report+0x2d5/0x2e0
[ 114.461994][ C0] ? kmsan_get_metadata+0x146/0x1d0
[ 114.467326][ C0] ? __msan_warning+0x95/0x120
[ 114.472344][ C0] ? receive_buf+0x25e3/0x5fd0
[ 114.477270][ C0] ? virtnet_poll+0xd1c/0x23c0
[ 114.482168][ C0] ? __napi_poll+0xe7/0x980
[ 114.486819][ C0] ? net_rx_action+0x82a/0x1850
[ 114.491807][ C0] ? handle_softirqs+0x1d8/0x810
[ 114.496881][ C0] ? __irq_exit_rcu+0x68/0x120
[ 114.501854][ C0] ? irq_exit_rcu+0x12/0x20
[ 114.506463][ C0] ? common_interrupt+0x94/0xa0
[ 114.511407][ C0] ? asm_common_interrupt+0x2b/0x40
[ 114.516827][ C0] ? acpi_safe_halt+0x25/0x30
[ 114.521642][ C0] ? acpi_idle_do_entry+0x22/0x40
[ 114.526872][ C0] ? acpi_idle_enter+0xa1/0xc0
[ 114.531752][ C0] ? cpuidle_enter_state+0xcb/0x250
[ 114.537063][ C0] ? cpuidle_enter+0x7f/0xf0
[ 114.541755][ C0] ? do_idle+0x551/0x750
[ 114.546289][ C0] ? cpu_startup_entry+0x65/0x80
[ 114.551346][ C0] ? rest_init+0x1e8/0x260
[ 114.555884][ C0] ? start_kernel+0x927/0xa70
[ 114.560670][ C0] ? x86_64_start_reservations+0x2e/0x30
[ 114.566418][ C0] ? x86_64_start_kernel+0x98/0xa0
[ 114.571740][ C0] ? common_startup_64+0x12c/0x137
[ 114.577097][ C0] ? kmsan_internal_memmove_metadata+0x17b/0x230
[ 114.583544][ C0] ? kmsan_get_metadata+0x146/0x1d0
[ 114.588860][ C0] ? kmsan_get_metadata+0x146/0x1d0
[ 114.594216][ C0] ? page_to_skb+0xdae/0x1620
[ 114.599030][ C0] ? kmsan_get_metadata+0x146/0x1d0
[ 114.604348][ C0] __msan_warning+0x95/0x120
[ 114.609032][ C0] receive_buf+0x25e3/0x5fd0
[ 114.613763][ C0] ? kmsan_get_metadata+0x146/0x1d0
[ 114.619119][ C0] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0
[ 114.625151][ C0] virtnet_poll+0xd1c/0x23c0
[ 114.629890][ C0] ? __pfx_virtnet_poll+0x10/0x10
[ 114.635162][ C0] __napi_poll+0xe7/0x980
[ 114.639626][ C0] ? kmsan_get_metadata+0x146/0x1d0
[ 114.644985][ C0] net_rx_action+0x82a/0x1850
[ 114.649776][ C0] ? sched_clock_cpu+0x55/0x870
[ 114.654740][ C0] ? __pfx_net_rx_action+0x10/0x10
[ 114.659963][ C0] handle_softirqs+0x1d8/0x810
[ 114.665187][ C0] __irq_exit_rcu+0x68/0x120
[ 114.669904][ C0] irq_exit_rcu+0x12/0x20
[ 114.674347][ C0] common_interrupt+0x94/0xa0
[ 114.679140][ C0] </IRQ>
[ 114.682136][ C0] <TASK>
[ 114.685126][ C0] asm_common_interrupt+0x2b/0x40
[ 114.690296][ C0] RIP: 0010:acpi_safe_halt+0x25/0x30
[ 114.695727][ C0] Code: 90 90 90 90 90 55 48 89 e5 65 48 8b 04 25 c0 5c 0a 00 48 f7 00 08 00 00 00 75 10 66 90 0f 00 2d 8b f2 50 00 f3 0f 1e fa fb f4 <fa> 5d c3 cc cc cc cc 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90
[ 114.715481][ C0] RSP: 0018:ffffffff91003ce8 EFLAGS: 00000246
[ 114.721640][ C0] RAX: ffffffff9102be00 RBX: ffffffff914830f0 RCX: 0000000000000001
[ 114.729711][ C0] RDX: ffff888103536464 RSI: ffffffff914830f0 RDI: ffff888103536464
[ 114.737788][ C0] RBP: ffffffff91003ce8 R08: ffffea000000000f R09: 00000000000000ff
[ 114.745861][ C0] R10: ffff88823f170e02 R11: ffffffff8f8c6600 R12: ffff888104f29800
[ 114.755574][ C0] R13: ffffffff91483170 R14: 0000000000000001 R15: 0000000000000001
[ 114.763645][ C0] ? __pfx_acpi_idle_enter+0x10/0x10
[ 114.769080][ C0] acpi_idle_do_entry+0x22/0x40
[ 114.774059][ C0] acpi_idle_enter+0xa1/0xc0
[ 114.778766][ C0] cpuidle_enter_state+0xcb/0x250
[ 114.784045][ C0] cpuidle_enter+0x7f/0xf0
[ 114.788595][ C0] do_idle+0x551/0x750
[ 114.792810][ C0] cpu_startup_entry+0x65/0x80
[ 114.797746][ C0] rest_init+0x1e8/0x260
[ 114.802132][ C0] start_kernel+0x927/0xa70
[ 114.806754][ C0] x86_64_start_reservations+0x2e/0x30
[ 114.812354][ C0] x86_64_start_kernel+0x98/0xa0
[ 114.817515][ C0] common_startup_64+0x12c/0x137
[ 114.822596][ C0] </TASK>
[ 114.826121][ C0] Kernel Offset: disabled
[ 114.830501][ 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-build1133093471=/tmp/go-build -gno-record-gcc-switches'
git status (err=<nil>)
HEAD detached at 9026e1428
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=9026e14289eaf45a00ddddb8730f2092b956d99a -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240510-174117'" "-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=9026e14289eaf45a00ddddb8730f2092b956d99a -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240510-174117'" "-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=\"9026e14289eaf45a00ddddb8730f2092b956d99a\"
Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=1133df6c980000
Tested on:
commit: 4b377b48 kprobe/ftrace: fix build error due to bad fun..
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git main
kernel config: https://syzkaller.appspot.com/x/.config?x=39dc6d181fb71e3a
dashboard link: https://syzkaller.appspot.com/bug?extid=d7b4dc6cd50410152534
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=102cc592980000