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Message-ID: <686e7698.050a0220.c28f5.0006.GAE@google.com>
Date: Wed, 09 Jul 2025 07:03:04 -0700
From: syzbot <syzbot+592e2ab8775dbe0bf09a@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, penguin-kernel@...ove.sakura.ne.jp,
syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [kernel?] INFO: task hung in uevent_show (2)
Hello,
syzbot tried to test the proposed patch but the build/boot failed:
T1] usbcore: registered new interface driver ssu100
[ 12.803467][ T1] usbserial: USB Serial support registered for Quatech SSU-100 USB to Serial Driver
[ 12.813847][ T1] usbcore: registered new interface driver symbolserial
[ 12.822971][ T1] usbserial: USB Serial support registered for symbol
[ 12.830470][ T1] usbcore: registered new interface driver ti_usb_3410_5052
[ 12.838383][ T1] usbserial: USB Serial support registered for TI USB 3410 1 port adapter
[ 12.847393][ T1] usbserial: USB Serial support registered for TI USB 5052 2 port adapter
[ 12.856857][ T1] usbcore: registered new interface driver upd78f0730
[ 12.864214][ T1] usbserial: USB Serial support registered for upd78f0730
[ 12.872005][ T1] usbcore: registered new interface driver visor
[ 12.878832][ T1] usbserial: USB Serial support registered for Handspring Visor / Palm OS
[ 12.888619][ T1] usbserial: USB Serial support registered for Sony Clie 5.0
[ 12.897025][ T1] usbserial: USB Serial support registered for Sony Clie 3.5
[ 12.905181][ T1] usbcore: registered new interface driver wishbone_serial
[ 12.912848][ T1] usbserial: USB Serial support registered for wishbone_serial
[ 12.921084][ T1] usbcore: registered new interface driver whiteheat
[ 12.928135][ T1] usbserial: USB Serial support registered for Connect Tech - WhiteHEAT - (prerenumeration)
[ 12.939389][ T1] usbserial: USB Serial support registered for Connect Tech - WhiteHEAT
[ 12.948619][ T1] usbcore: registered new interface driver xr_serial
[ 12.955889][ T1] usbserial: USB Serial support registered for xr_serial
[ 12.963719][ T1] usbcore: registered new interface driver xsens_mt
[ 12.972185][ T1] usbserial: USB Serial support registered for xsens_mt
[ 12.980323][ T1] usbcore: registered new interface driver adutux
[ 12.987512][ T1] usbcore: registered new interface driver appledisplay
[ 12.995415][ T1] usbcore: registered new interface driver cypress_cy7c63
[ 13.003293][ T1] usbcore: registered new interface driver cytherm
[ 13.010571][ T1] usbcore: registered new interface driver emi26 - firmware loader
[ 13.019440][ T1] usbcore: registered new interface driver emi62 - firmware loader
[ 13.027806][ T1] usbcore: registered new device driver apple-mfi-fastcharge
[ 13.036824][ T1] usbcore: registered new interface driver ljca
[ 13.044111][ T1] usbcore: registered new interface driver idmouse
[ 13.052002][ T1] usbcore: registered new interface driver iowarrior
[ 13.059704][ T1] usbcore: registered new interface driver isight_firmware
[ 13.067642][ T1] usbcore: registered new interface driver usblcd
[ 13.074816][ T1] usbcore: registered new interface driver ldusb
[ 13.082081][ T1] usbcore: registered new interface driver legousbtower
[ 13.089958][ T1] usbcore: registered new interface driver usbtest
[ 13.097300][ T1] usbcore: registered new interface driver usb_ehset_test
[ 13.105262][ T1] usbcore: registered new interface driver trancevibrator
[ 13.113543][ T1] usbcore: registered new interface driver uss720
[ 13.120280][ T1] uss720: USB Parport Cable driver for Cables using the Lucent Technologies USS720 Chip
[ 13.130535][ T1] uss720: NOTE: this is a special purpose driver to allow nonstandard
[ 13.138957][ T1] uss720: protocols (eg. bitbang) over USS720 usb to parallel cables
[ 13.147209][ T1] uss720: If you just want to connect to a printer, use usblp instead
[ 13.156564][ T1] usbcore: registered new interface driver usbsevseg
[ 13.164290][ T1] usbcore: registered new interface driver yurex
[ 13.172561][ T1] usbcore: registered new interface driver chaoskey
[ 13.180124][ T1] usbcore: registered new interface driver sisusb
[ 13.187445][ T1] usbcore: registered new interface driver lvs
[ 13.194534][ T1] usbcore: registered new interface driver cxacru
[ 13.201660][ T1] usbcore: registered new interface driver speedtch
[ 13.209706][ T1] usbcore: registered new interface driver ueagle-atm
[ 13.217258][ T1] xusbatm: malformed module parameters
[ 13.236709][ T1] dummy_hcd dummy_hcd.0: USB Host+Gadget Emulator, driver 02 May 2005
[ 13.245196][ T1] dummy_hcd dummy_hcd.0: Dummy host controller
[ 13.257875][ T1] dummy_hcd dummy_hcd.0: new USB bus registered, assigned bus number 1
[ 13.277863][ T1] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 6.16
[ 13.288670][ T1] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 13.296864][ T1] usb usb1: Product: Dummy host controller
[ 13.303515][ T1] usb usb1: Manufacturer: Linux 6.16.0-rc5-syzkaller-00038-g733923397fd9-dirty dummy_hcd
[ 13.313553][ T1] usb usb1: SerialNumber: dummy_hcd.0
[ 13.333561][ T1] hub 1-0:1.0: USB hub found
[ 13.342305][ T1] hub 1-0:1.0: 1 port detected
[ 13.350916][ T1] ------------[ cut here ]------------
[ 13.356580][ T1] kernel BUG at ./include/linux/usb.h:1990!
[ 13.362686][ T1] Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
[ 13.368994][ T1] CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.16.0-rc5-syzkaller-00038-g733923397fd9-dirty #0 PREEMPT(full)
[ 13.372565][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
[ 13.372565][ T1] RIP: 0010:__create_pipe+0xa2/0xb0
[ 13.372565][ T1] Code: 80 e1 07 80 c1 03 38 c1 7c a5 4c 89 f7 e8 56 8f 0a fb eb 9b e8 5f 33 a9 fa 90 0f 0b e8 57 33 a9 fa 90 0f 0b e8 4f 33 a9 fa 90 <0f> 0b 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90
[ 13.372565][ T1] RSP: 0000:ffffc90000066680 EFLAGS: 00010293
[ 13.372565][ T1] RAX: ffffffff8716c411 RBX: 0000000000000081 RCX: ffff88801caf8000
[ 13.372565][ T1] RDX: 0000000000000000 RSI: 0000000000000081 RDI: 000000000000000f
[ 13.372565][ T1] RBP: 0000000000000001 R08: ffffc900000665c7 R09: 1ffff9200000ccb8
[ 13.372565][ T1] R10: dffffc0000000000 R11: fffff5200000ccb9 R12: 00000000000001f4
[ 13.372565][ T1] R13: 1ffff11004fd0c37 R14: ffff888027e82000 R15: ffff888027e861b8
[ 13.372565][ T1] FS: 0000000000000000(0000) GS:ffff8881261a1000(0000) knlGS:0000000000000000
[ 13.372565][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 13.372565][ T1] CR2: 0000000000000000 CR3: 000000000dd38000 CR4: 00000000003526f0
[ 13.372565][ T1] Call Trace:
[ 13.372565][ T1] <TASK>
[ 13.372565][ T1] hub_probe+0x2300/0x3840
[ 13.372565][ T1] ? __pfx_hub_probe+0x10/0x10
[ 13.372565][ T1] ? _raw_spin_unlock_irqrestore+0xad/0x110
[ 13.372565][ T1] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10
[ 13.372565][ T1] ? ktime_get_mono_fast_ns+0x2af/0x2d0
[ 13.372565][ T1] ? pm_runtime_enable+0x1f3/0x340
[ 13.372565][ T1] usb_probe_interface+0x644/0xbc0
[ 13.372565][ T1] ? __pfx_usb_probe_interface+0x10/0x10
[ 13.372565][ T1] really_probe+0x26a/0x9a0
[ 13.372565][ T1] __driver_probe_device+0x18c/0x2f0
[ 13.372565][ T1] driver_probe_device+0x4f/0x430
[ 13.372565][ T1] __device_attach_driver+0x2ce/0x530
[ 13.372565][ T1] bus_for_each_drv+0x251/0x2e0
[ 13.372565][ T1] ? __pfx___device_attach_driver+0x10/0x10
[ 13.372565][ T1] ? __pfx_bus_for_each_drv+0x10/0x10
[ 13.372565][ T1] __device_attach+0x2b8/0x400
[ 13.372565][ T1] ? __pfx___device_attach+0x10/0x10
[ 13.372565][ T1] ? do_raw_spin_unlock+0x122/0x240
[ 13.372565][ T1] bus_probe_device+0x185/0x260
[ 13.372565][ T1] device_add+0x7b6/0xb50
[ 13.372565][ T1] usb_set_configuration+0x1ab9/0x2120
[ 13.372565][ T1] usb_generic_driver_probe+0x8d/0x150
[ 13.372565][ T1] usb_probe_device+0x1c1/0x390
[ 13.372565][ T1] ? __pfx_usb_probe_device+0x10/0x10
[ 13.372565][ T1] really_probe+0x26a/0x9a0
[ 13.372565][ T1] __driver_probe_device+0x18c/0x2f0
[ 13.372565][ T1] driver_probe_device+0x4f/0x430
[ 13.372565][ T1] __device_attach_driver+0x2ce/0x530
[ 13.372565][ T1] bus_for_each_drv+0x251/0x2e0
[ 13.372565][ T1] ? __pfx___device_attach_driver+0x10/0x10
[ 13.372565][ T1] ? __pfx_bus_for_each_drv+0x10/0x10
[ 13.372565][ T1] __device_attach+0x2b8/0x400
[ 13.372565][ T1] ? __pfx___device_attach+0x10/0x10
[ 13.372565][ T1] ? do_raw_spin_unlock+0x122/0x240
[ 13.372565][ T1] bus_probe_device+0x185/0x260
[ 13.372565][ T1] device_add+0x7b6/0xb50
[ 13.372565][ T1] usb_new_device+0x9fd/0x1610
[ 13.372565][ T1] ? __pfx_usb_new_device+0x10/0x10
[ 13.372565][ T1] ? register_root_hub+0x153/0x590
[ 13.372565][ T1] ? kfree+0x18e/0x440
[ 13.372565][ T1] register_root_hub+0x275/0x590
[ 13.372565][ T1] ? usb_add_hcd+0xb90/0x1050
[ 13.372565][ T1] usb_add_hcd+0xba1/0x1050
[ 13.372565][ T1] dummy_hcd_probe+0x134/0x270
[ 13.372565][ T1] platform_probe+0x148/0x1d0
[ 13.372565][ T1] ? __pfx_platform_probe+0x10/0x10
[ 13.372565][ T1] really_probe+0x26a/0x9a0
[ 13.372565][ T1] __driver_probe_device+0x18c/0x2f0
[ 13.372565][ T1] driver_probe_device+0x4f/0x430
[ 13.372565][ T1] __device_attach_driver+0x2ce/0x530
[ 13.372565][ T1] bus_for_each_drv+0x251/0x2e0
[ 13.372565][ T1] ? __pfx___device_attach_driver+0x10/0x10
[ 13.372565][ T1] ? __pfx_bus_for_each_drv+0x10/0x10
[ 13.372565][ T1] __device_attach+0x2b8/0x400
[ 13.372565][ T1] ? __pfx___device_attach+0x10/0x10
[ 13.372565][ T1] ? do_raw_spin_unlock+0x122/0x240
[ 13.372565][ T1] bus_probe_device+0x185/0x260
[ 13.372565][ T1] device_add+0x7b6/0xb50
[ 13.372565][ T1] platform_device_add+0x4b4/0x820
[ 13.372565][ T1] ? deferred_probe_extend_timeout+0x79/0xb0
[ 13.372565][ T1] dummy_hcd_init+0x293/0x1070
[ 13.372565][ T1] ? __pfx_dummy_hcd_init+0x10/0x10
[ 13.372565][ T1] ? __pfx_add_device_randomness+0x10/0x10
[ 13.372565][ T1] ? configfs_register_subsystem+0x4ca/0x520
[ 13.372565][ T1] ? __pfx_dummy_hcd_init+0x10/0x10
[ 13.372565][ T1] do_one_initcall+0x233/0x820
[ 13.372565][ T1] ? __pfx_dummy_hcd_init+0x10/0x10
[ 13.372565][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 13.372565][ T1] ? rcu_is_watching+0x15/0xb0
[ 13.372565][ T1] ? trace_irq_disable+0x37/0x110
[ 13.372565][ T1] ? preempt_schedule_irq+0xde/0x150
[ 13.372565][ T1] ? __pfx_preempt_schedule_irq+0x10/0x10
[ 13.372565][ T1] ? irqentry_exit+0x74/0x90
[ 13.372565][ T1] ? lockdep_hardirqs_on+0x9c/0x150
[ 13.372565][ T1] ? irqentry_exit+0x74/0x90
[ 13.372565][ T1] ? lockdep_hardirqs_on+0x9c/0x150
[ 13.372565][ T1] ? next_arg+0x498/0x5e0
[ 13.372565][ T1] ? parameq+0x14d/0x170
[ 13.372565][ T1] ? parse_args+0x993/0xa70
[ 13.372565][ T1] ? __pfx_parse_args+0x10/0x10
[ 13.372565][ T1] ? rcu_is_watching+0x15/0xb0
[ 13.372565][ T1] do_initcall_level+0x137/0x1f0
[ 13.372565][ T1] do_initcalls+0x69/0xd0
[ 13.372565][ T1] kernel_init_freeable+0x3d9/0x570
[ 13.372565][ T1] ? __pfx_kernel_init_freeable+0x10/0x10
[ 13.372565][ T1] ? _raw_spin_unlock_irq+0x23/0x50
[ 13.372565][ T1] ? __pfx_kernel_init+0x10/0x10
[ 13.372565][ T1] kernel_init+0x1d/0x1d0
[ 13.372565][ T1] ? __pfx_kernel_init+0x10/0x10
[ 13.372565][ T1] ret_from_fork+0x3fc/0x770
[ 13.372565][ T1] ? __pfx_ret_from_fork+0x10/0x10
[ 13.372565][ T1] ? __switch_to_asm+0x39/0x70
[ 13.372565][ T1] ? __switch_to_asm+0x33/0x70
[ 13.372565][ T1] ? __pfx_kernel_init+0x10/0x10
[ 13.372565][ T1] ret_from_fork_asm+0x1a/0x30
[ 13.372565][ T1] </TASK>
[ 13.372565][ T1] Modules linked in:
[ 13.372565][ C1] vkms_vblank_simulate: vblank timer overrun
[ 13.995865][ T1] ---[ end trace 0000000000000000 ]---
[ 14.001889][ T1] RIP: 0010:__create_pipe+0xa2/0xb0
[ 14.007135][ T1] Code: 80 e1 07 80 c1 03 38 c1 7c a5 4c 89 f7 e8 56 8f 0a fb eb 9b e8 5f 33 a9 fa 90 0f 0b e8 57 33 a9 fa 90 0f 0b e8 4f 33 a9 fa 90 <0f> 0b 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90
[ 14.026940][ T1] RSP: 0000:ffffc90000066680 EFLAGS: 00010293
[ 14.033310][ T1] RAX: ffffffff8716c411 RBX: 0000000000000081 RCX: ffff88801caf8000
[ 14.041768][ T1] RDX: 0000000000000000 RSI: 0000000000000081 RDI: 000000000000000f
[ 14.049904][ T1] RBP: 0000000000000001 R08: ffffc900000665c7 R09: 1ffff9200000ccb8
[ 14.058174][ T1] R10: dffffc0000000000 R11: fffff5200000ccb9 R12: 00000000000001f4
[ 14.066824][ T1] R13: 1ffff11004fd0c37 R14: ffff888027e82000 R15: ffff888027e861b8
[ 14.074933][ T1] FS: 0000000000000000(0000) GS:ffff8881260a1000(0000) knlGS:0000000000000000
[ 14.084097][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 14.090767][ T1] CR2: ffff88823ffff000 CR3: 000000000dd38000 CR4: 00000000003526f0
[ 14.098809][ T1] Kernel panic - not syncing: Fatal exception
[ 14.100723][ T1] Kernel Offset: disabled
[ 14.100723][ T1] Rebooting in 86400 seconds..
syzkaller build log:
go env (err=<nil>)
AR='ar'
CC='gcc'
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_ENABLED='1'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
CXX='g++'
GCCGO='gccgo'
GO111MODULE='auto'
GOAMD64='v1'
GOARCH='amd64'
GOAUTH='netrc'
GOBIN=''
GOCACHE='/syzkaller/.cache/go-build'
GOCACHEPROG=''
GODEBUG=''
GOENV='/syzkaller/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFIPS140='off'
GOFLAGS=''
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build4116787073=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.mod'
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'
GOTELEMETRY='local'
GOTELEMETRYDIR='/syzkaller/.config/go/telemetry'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.24.4'
GOWORK=''
PKG_CONFIG='pkg-config'
git status (err=<nil>)
HEAD detached at 6a8fcbc4a6
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=6a8fcbc4a6172c831c89c507007f59fba13408aa -X 'github.com/google/syzkaller/prog.gitRevisionDate=20250226-150939'" -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 -DGOOS_linux=1 -DGOARCH_amd64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"6a8fcbc4a6172c831c89c507007f59fba13408aa\"
/usr/bin/ld: /tmp/ccrMQnbM.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=148c1a8c580000
Tested on:
commit: 73392339 Merge tag 'pwm/for-6.16-rc6-fixes' of git://g..
git tree: upstream
kernel config: https://syzkaller.appspot.com/x/.config?x=f481202e4ff2d138
dashboard link: https://syzkaller.appspot.com/bug?extid=592e2ab8775dbe0bf09a
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
patch: https://syzkaller.appspot.com/x/patch.diff?x=13f27f70580000
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