Hello,
syzbot tried to test the proposed patch but the build/boot failed:
46.862565][ T1] IPI shorthand broadcast: enabled
[ 48.390695][ T1] sched_clock: Marking stable (48370050826, 17960846)->(48402924943, -14913271)
[ 49.493182][ T1] Timer migration: 1 hierarchy levels; 8 children per group; 0 crossnode level
[ 49.645015][ T1] registered taskstats version 1
[ 49.719060][ T1] Loading compiled-in X.509 certificates
[ 49.757838][ T1] Loaded X.509 cert 'Build time autogenerated kernel key: 0721be491b560242240f4d386be31dadacd83fb9'
[ 49.999690][ T1] zswap: loaded using pool lzo/zsmalloc
[ 50.009346][ T1] Demotion targets for Node 0: null
[ 50.014859][ T1] Demotion targets for Node 1: null
[ 50.024245][ T1] Key type .fscrypt registered
[ 50.029139][ T1] Key type fscrypt-provisioning registered
[ 50.036215][ T1] kAFS: Red Hat AFS client v0.1 registering.
[ 50.067479][ T1] Btrfs loaded, assert=on, ref-verify=on, zoned=yes, fsverity=yes
[ 50.093752][ T1] Key type encrypted registered
[ 50.098879][ T1] AppArmor: AppArmor sha256 policy hashing enabled
[ 50.105629][ T1] ima: No TPM chip found, activating TPM-bypass!
[ 50.112793][ T1] Loading compiled-in module X.509 certificates
[ 50.155555][ T1] Loaded X.509 cert 'Build time autogenerated kernel key: 0721be491b560242240f4d386be31dadacd83fb9'
[ 50.166713][ T1] ima: Allocated hash algorithm: sha256
[ 50.172789][ T1] ima: No architecture policies found
[ 50.179427][ T1] evm: Initialising EVM extended attributes:
[ 50.185545][ T1] evm: security.selinux (disabled)
[ 50.190767][ T1] evm: security.SMACK64 (disabled)
[ 50.196020][ T1] evm: security.SMACK64EXEC (disabled)
[ 50.201593][ T1] evm: security.SMACK64TRANSMUTE (disabled)
[ 50.207535][ T1] evm: security.SMACK64MMAP (disabled)
[ 50.213128][ T1] evm: security.apparmor
[ 50.217595][ T1] evm: security.ima
[ 50.221508][ T1] evm: security.capability
[ 50.225972][ T1] evm: HMAC attrs: 0x1
[ 50.234955][ T1] PM: Magic number: 12:678:32
[ 50.241542][ T1] tty ttydf: hash matches
[ 50.247287][ T1] printk: legacy console [netcon0] enabled
[ 50.254497][ T1] netconsole: network logging started
[ 50.261482][ T1] gtp: GTP module loaded (pdp ctx size 128 bytes)
[ 50.270457][ T1] rdma_rxe: loaded
[ 50.276235][ T1] cfg80211: Loading compiled-in X.509 certificates for regulatory database
[ 50.295946][ T1] Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
[ 50.313521][ T1] Loaded X.509 cert 'wens: 61c038651aabdcf94bd0ac7ff06c7248db18c600'
[ 50.322130][ T1] clk: Disabling unused clocks
[ 50.327068][ T1] ALSA device list:
[ 50.331121][ T1] #0: Dummy 1
[ 50.334711][ T1] #1: Loopback 1
[ 50.339143][ T1] #2: Virtual MIDI Card 1
[ 50.350432][ T1] md: Waiting for all devices to be available before autodetect
[ 50.350717][ T25] platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
[ 50.358332][ T1] md: If you don't use raid, use raid=noautodetect
[ 50.358393][ T1] md: Autodetecting RAID arrays.
[ 50.358434][ T1] md: autorun ...
[ 50.358473][ T1] md: ... autorun DONE.
[ 50.388342][ T25] platform regulatory.0: Falling back to sysfs fallback for: regulatory.db
[ 50.481647][ T1] EXT4-fs (sda1): mounted filesystem 5941fea2-f5fa-4b4e-b5ef-9af118b27b95 ro with ordered data mode. Quota mode: none.
[ 50.495006][ T1] VFS: Mounted root (ext4 filesystem) readonly on device 8:1.
[ 50.507343][ T1] devtmpfs: mounted
[ 50.770936][ T1] Freeing unused kernel image (initmem) memory: 36920K
[ 50.782607][ T1] Write protecting the kernel read-only data: 260096k
[ 50.830503][ T1] Freeing unused kernel image (rodata/data gap) memory: 1876K
[ 52.482845][ T1] x86/mm: Checked W+X mappings: passed, no W+X pages found.
[ 52.493217][ T1] x86/mm: Checking user space page tables
[ 53.998271][ T1] x86/mm: Checked W+X mappings: passed, no W+X pages found.
[ 54.007467][ T1] Failed to set sysctl parameter 'kernel.hung_task_all_cpu_backtrace=1': parameter not found
[ 54.031284][ T1] Failed to set sysctl parameter 'max_rcu_stall_to_panic=1': parameter not found
[ 54.043107][ T1] Run /sbin/init as init process
[ 55.620910][ T4446] mount (4446) used greatest stack depth: 8144 bytes left
[ 55.692569][ 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
[ 56.030947][ 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: [ 59.860978][ T4480] udevd[4480]: starting version 3.2.11
[ 63.448534][ T4481] udevd[4481]: starting eudev-3.2.11
[ 63.461355][ T4480] udevd (4480) used greatest stack depth: 5376 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
no interfaces have a carrier
forked to background, child pid 4694
[ 111.282058][ T4695] 8021q: adding VLAN 0 to HW filter on device bond0
[ 111.333940][ T4695] eql: remember to turn off Van-Jacobson compression on your slave devices
[ 111.851180][ T25] cfg80211: failed to load regulatory.db
Starting sshd: OK
syzkaller
syzkaller login: [ 113.999622][ C0] =====================================================
[ 114.006947][ C0] BUG: KMSAN: uninit-value in receive_buf+0x25e3/0x5fd0
[ 114.014214][ C0] receive_buf+0x25e3/0x5fd0
[ 114.019047][ C0] virtnet_poll+0xd1c/0x23c0
[ 114.023845][ C0] __napi_poll+0xe7/0x980
[ 114.028437][ C0] net_rx_action+0x82a/0x1850
[ 114.033296][ C0] handle_softirqs+0x1ce/0x800
[ 114.038238][ C0] __irq_exit_rcu+0x68/0x120
[ 114.042976][ C0] irq_exit_rcu+0x12/0x20
[ 114.047393][ C0] common_interrupt+0x94/0xa0
[ 114.052272][ C0] asm_common_interrupt+0x2b/0x40
[ 114.057547][ C0] acpi_safe_halt+0x25/0x30
[ 114.062420][ C0] acpi_idle_do_entry+0x22/0x40
[ 114.067438][ C0] acpi_idle_enter+0xa1/0xc0
[ 114.072234][ C0] cpuidle_enter_state+0xcb/0x250
[ 114.077501][ C0] cpuidle_enter+0x7f/0xf0
[ 114.082119][ C0] do_idle+0x551/0x750
[ 114.086349][ C0] cpu_startup_entry+0x65/0x80
[ 114.091272][ C0] rest_init+0x1e8/0x260
[ 114.095675][ C0] start_kernel+0x92c/0xa70
[ 114.100384][ C0] x86_64_start_reservations+0x2e/0x30
[ 114.106047][ C0] x86_64_start_kernel+0x98/0xa0
[ 114.111263][ C0] common_startup_64+0x12c/0x137
[ 114.116564][ C0]
[ 114.119010][ C0] Uninit was created at:
[ 114.123471][ C0] __alloc_pages_noprof+0x9d6/0xe70
[ 114.128864][ C0] alloc_pages_mpol_noprof+0x299/0x990
[ 114.134532][ C0] alloc_pages_noprof+0x1bf/0x1e0
[ 114.139774][ C0] skb_page_frag_refill+0x2bf/0x7c0
[ 114.145167][ C0] virtnet_rq_alloc+0x43/0xbb0
[ 114.150208][ C0] try_fill_recv+0x3f0/0x2f50
[ 114.155069][ C0] virtnet_open+0x1cc/0xb00
[ 114.159814][ C0] __dev_open+0x546/0x6f0
[ 114.164339][ C0] __dev_change_flags+0x309/0x9a0
[ 114.169581][ C0] dev_change_flags+0x8e/0x1d0
[ 114.174515][ C0] devinet_ioctl+0x13ec/0x22c0
[ 114.179650][ C0] inet_ioctl+0x4bd/0x6d0
[ 114.184217][ C0] sock_do_ioctl+0xb7/0x540
[ 114.188902][ C0] sock_ioctl+0x727/0xd70
[ 114.193366][ C0] __se_sys_ioctl+0x261/0x450
[ 114.198305][ C0] __x64_sys_ioctl+0x96/0xe0
[ 114.203035][ C0] x64_sys_call+0x18c0/0x3b90
[ 114.208102][ C0] do_syscall_64+0xcd/0x1e0
[ 114.212760][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 114.218840][ C0]
[ 114.221299][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.10.0-rc3-syzkaller-00022-g90302a82de09 #0
[ 114.231270][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
[ 114.241487][ C0] =====================================================
[ 114.248662][ C0] Disabling lock debugging due to kernel taint
[ 114.254904][ C0] Kernel panic - not syncing: kmsan.panic set ...
[ 114.261375][ C0] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G B 6.10.0-rc3-syzkaller-00022-g90302a82de09 #0
[ 114.272855][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
[ 114.283040][ C0] Call Trace:
[ 114.286385][ C0] <IRQ>
[ 114.289279][ C0] dump_stack_lvl+0x216/0x2d0
[ 114.294091][ C0] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0
[ 114.300049][ C0] dump_stack+0x1e/0x30
[ 114.304329][ C0] panic+0x4e2/0xcd0
[ 114.308315][ C0] ? kmsan_get_metadata+0xb1/0x1d0
[ 114.313630][ C0] kmsan_report+0x2d5/0x2e0
[ 114.318244][ C0] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0
[ 114.324165][ C0] ? kmsan_get_metadata+0x146/0x1d0
[ 114.329472][ C0] ? __msan_warning+0x95/0x120
[ 114.334350][ C0] ? receive_buf+0x25e3/0x5fd0
[ 114.339235][ C0] ? virtnet_poll+0xd1c/0x23c0
[ 114.344129][ C0] ? __napi_poll+0xe7/0x980
[ 114.348859][ C0] ? net_rx_action+0x82a/0x1850
[ 114.353823][ C0] ? handle_softirqs+0x1ce/0x800
[ 114.358872][ C0] ? __irq_exit_rcu+0x68/0x120
[ 114.363742][ C0] ? irq_exit_rcu+0x12/0x20
[ 114.368333][ C0] ? common_interrupt+0x94/0xa0
[ 114.373295][ C0] ? asm_common_interrupt+0x2b/0x40
[ 114.378595][ C0] ? acpi_safe_halt+0x25/0x30
[ 114.383390][ C0] ? acpi_idle_do_entry+0x22/0x40
[ 114.388528][ C0] ? acpi_idle_enter+0xa1/0xc0
[ 114.393384][ C0] ? cpuidle_enter_state+0xcb/0x250
[ 114.398680][ C0] ? cpuidle_enter+0x7f/0xf0
[ 114.403397][ C0] ? do_idle+0x551/0x750
[ 114.407738][ C0] ? cpu_startup_entry+0x65/0x80
[ 114.412803][ C0] ? rest_init+0x1e8/0x260
[ 114.417343][ C0] ? start_kernel+0x92c/0xa70
[ 114.422151][ C0] ? x86_64_start_reservations+0x2e/0x30
[ 114.427913][ C0] ? x86_64_start_kernel+0x98/0xa0
[ 114.433238][ C0] ? common_startup_64+0x12c/0x137
[ 114.438556][ C0] ? kmsan_internal_memmove_metadata+0x17b/0x230
[ 114.444994][ C0] ? kmsan_get_metadata+0x146/0x1d0
[ 114.450384][ C0] ? kmsan_get_metadata+0x146/0x1d0
[ 114.455777][ C0] ? page_to_skb+0xdae/0x1620
[ 114.460590][ C0] ? kmsan_get_metadata+0x146/0x1d0
[ 114.466005][ C0] __msan_warning+0x95/0x120
[ 114.470702][ C0] receive_buf+0x25e3/0x5fd0
[ 114.475415][ C0] ? kmsan_get_metadata+0x146/0x1d0
[ 114.480723][ C0] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0
[ 114.486658][ C0] virtnet_poll+0xd1c/0x23c0
[ 114.491392][ C0] ? __pfx_virtnet_poll+0x10/0x10
[ 114.496535][ C0] __napi_poll+0xe7/0x980
[ 114.500975][ C0] ? kmsan_get_metadata+0x146/0x1d0
[ 114.506376][ C0] net_rx_action+0x82a/0x1850
[ 114.511264][ C0] ? sched_clock_cpu+0x55/0x870
[ 114.516222][ C0] ? __pfx_net_rx_action+0x10/0x10
[ 114.521456][ C0] handle_softirqs+0x1ce/0x800
[ 114.526340][ C0] __irq_exit_rcu+0x68/0x120
[ 114.531117][ C0] irq_exit_rcu+0x12/0x20
[ 114.535538][ C0] common_interrupt+0x94/0xa0
[ 114.540324][ C0] </IRQ>
[ 114.543335][ C0] <TASK>
[ 114.546400][ C0] asm_common_interrupt+0x2b/0x40
[ 114.551563][ C0] RIP: 0010:acpi_safe_halt+0x25/0x30
[ 114.557004][ C0] Code: 90 90 90 90 90 55 48 89 e5 65 48 8b 04 25 80 5e 0a 00 48 f7 00 08 00 00 00 75 10 66 90 0f 00 2d eb b8 44 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
[ 114.576730][ C0] RSP: 0018:ffffffff90e03ce8 EFLAGS: 00000246
[ 114.582968][ C0] RAX: ffffffff90e2bdc0 RBX: ffffffff91286bb0 RCX: 0000000000000001
[ 114.591022][ C0] RDX: ffff88810322e064 RSI: ffffffff91286bb0 RDI: ffff88810322e064
[ 114.599114][ C0] RBP: ffffffff90e03ce8 R08: ffffea000000000f R09: 00000000000000ff
[ 114.607295][ C0] R10: ffff88823f173dc2 R11: ffffffff8f78a590 R12: ffff888103ce3c00
[ 114.615378][ C0] R13: ffffffff91286c30 R14: 0000000000000001 R15: 0000000000000001
[ 114.623533][ C0] ? __pfx_acpi_idle_enter+0x10/0x10
[ 114.628953][ C0] acpi_idle_do_entry+0x22/0x40
[ 114.633915][ C0] acpi_idle_enter+0xa1/0xc0
[ 114.638600][ C0] cpuidle_enter_state+0xcb/0x250
[ 114.643752][ C0] cpuidle_enter+0x7f/0xf0
[ 114.648302][ C0] do_idle+0x551/0x750
[ 114.652474][ C0] cpu_startup_entry+0x65/0x80
[ 114.657345][ C0] rest_init+0x1e8/0x260
[ 114.661722][ C0] start_kernel+0x92c/0xa70
[ 114.666326][ C0] x86_64_start_reservations+0x2e/0x30
[ 114.671913][ C0] x86_64_start_kernel+0x98/0xa0
[ 114.676985][ C0] common_startup_64+0x12c/0x137
[ 114.682081][ C0] </TASK>
[ 114.685493][ C0] Kernel Offset: disabled
[ 114.689884][ 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-build3847290796=/tmp/go-build -gno-record-gcc-switches'
git status (err=<nil>)
HEAD detached at 53df08b6d9
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=53df08b6d9d1467aa178b49a550c7b722fd9aa42 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240408-113412'" "-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=53df08b6d9d1467aa178b49a550c7b722fd9aa42 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240408-113412'" "-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=53df08b6d9d1467aa178b49a550c7b722fd9aa42 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240408-113412'" "-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=\"53df08b6d9d1467aa178b49a550c7b722fd9aa42\"
Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=159dd4fa980000
Tested on:
commit: 90302a82 kernel/bpf: KMSAN: uninit-value in htab_lru_p..
git tree: https://linux.googlesource.com/linux/kernel/git/torvalds/linux
kernel config: https://syzkaller.appspot.com/x/.config?x=b97faf4c225206cd
dashboard link: https://syzkaller.appspot.com/bug?extid=c33bff5d5da1391df027
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Note: no patches were applied.