ci2 starts bisection 2025-11-18 17:03:06.67179569 +0000 UTC m=+104869.474811756
bisecting fixing commit since 7a6c2d093c4599727874a7e5e9b27fb313d2bd9c
building syzkaller on d291dd2d58a1885c00a60561048b6ceb1bf1206a
ensuring issue is reproducible on original commit 7a6c2d093c4599727874a7e5e9b27fb313d2bd9c
testing commit 7a6c2d093c4599727874a7e5e9b27fb313d2bd9c gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: caccc0c95cfa8f54d9a71f1a79dbbd218d590be0c31343a33be62adc4a672659
run #0: crashed: WARNING in bpf_probe_read_user
run #1: crashed: possible deadlock in __hrtimer_run_queues
run #2: crashed: WARNING in syz
run #3: crashed: possible deadlock in __hrtimer_run_queues
run #4: crashed: WARNING in bpf_probe_read_user
run #5: crashed: possible deadlock in console_unlock
run #6: crashed: WARNING in syz
run #7: crashed: WARNING in hrtimer_start_range_ns
run #8: crashed: WARNING in bpf_probe_read_user
run #9: crashed: WARNING in bpf_probe_read_user
run #10: crashed: WARNING in hrtimer_start_range_ns
run #11: crashed: possible deadlock in console_unlock
run #12: crashed: WARNING in bpf_probe_read_user
run #13: crashed: WARNING in bpf_probe_read_user
run #14: crashed: WARNING in bpf_probe_read_user
run #15: crashed: WARNING in bpf_probe_read_user
run #16: crashed: WARNING in bpf_probe_read_user
run #17: crashed: WARNING in bpf_probe_read_user
run #18: crashed: WARNING in bpf_probe_read_user
run #19: crashed: possible deadlock in __hrtimer_run_queues
representative crash: WARNING in bpf_probe_read_user, types: [WARNING]
check whether we can drop unnecessary instrumentation
disabling configs for [kasan locking atomic_sleep hang memleak ubsan], they are not needed
testing commit 7a6c2d093c4599727874a7e5e9b27fb313d2bd9c gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: d5e130e975f675178ab4bd88e1eae783df6834d46a9461566f487b85bf557781
all runs: OK
false negative chance: 0.000
kconfig minimization: base=3707 full=7423 leaves diff=2100
split chunks (needed=false): <2100>
split chunk #0 of len 2100 into 5 parts
testing without sub-chunk 1/5
testing commit 7a6c2d093c4599727874a7e5e9b27fb313d2bd9c gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 841894928ba380fa05d67cf7e464f87412dfa159d6aa0ea6a023ee1718cf11f3
run #0: crashed: WARNING in bpf_probe_read_user
run #1: crashed: possible deadlock in console_unlock
run #2: crashed: WARNING in bpf_probe_read_user
run #3: crashed: possible deadlock in __hrtimer_run_queues
run #4: crashed: WARNING in bpf_probe_read_user
run #5: crashed: WARNING in bpf_probe_read_user
run #6: crashed: WARNING in bpf_probe_read_user
run #7: crashed: WARNING in bpf_probe_read_user
run #8: crashed: possible deadlock in console_unlock
run #9: crashed: possible deadlock in console_unlock
representative crash: WARNING in bpf_probe_read_user, types: [WARNING LOCKDEP]
the chunk can be dropped
testing without sub-chunk 2/5
testing commit 7a6c2d093c4599727874a7e5e9b27fb313d2bd9c gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: eb2848edd47b0bb7db243ae784c6c36f12da3ea021791481ed5311406da29388
all runs: crashed: WARNING in bpf_probe_read_user
representative crash: WARNING in bpf_probe_read_user, types: [WARNING]
the chunk can be dropped
testing without sub-chunk 3/5
testing commit 7a6c2d093c4599727874a7e5e9b27fb313d2bd9c gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: efd471a439b0df9b35acab24cfffa113126b33df50b73ece223918274de09050
run #0: crashed: WARNING in bpf_probe_read_user
run #1: crashed: WARNING in bpf_probe_read_user
run #2: crashed: WARNING in bpf_probe_read_user
run #3: crashed: WARNING in bpf_probe_read_user
run #4: crashed: WARNING in bpf_probe_read_user
run #5: crashed: WARNING in bpf_probe_read_user
run #6: crashed: WARNING in bpf_probe_read_user
run #7: crashed: WARNING in bpf_probe_read_user
run #8: crashed: WARNING in bpf_probe_read_user
run #9: OK
representative crash: WARNING in bpf_probe_read_user, types: [WARNING]
the chunk can be dropped
testing without sub-chunk 4/5
testing commit 7a6c2d093c4599727874a7e5e9b27fb313d2bd9c gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 71b375f901f7d7b0e8c14b4ad42d2000fbffac1462c96e0b03cff5ae799019cb
run #0: crashed: WARNING in bpf_probe_read_user
run #1: crashed: WARNING in bpf_probe_read_user
run #2: crashed: WARNING in bpf_probe_read_user
run #3: crashed: WARNING in bpf_probe_read_user
run #4: crashed: WARNING in bpf_probe_read_user
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
representative crash: WARNING in bpf_probe_read_user, types: [WARNING]
the chunk can be dropped
testing without sub-chunk 5/5
testing commit 7a6c2d093c4599727874a7e5e9b27fb313d2bd9c gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: de343de391de1f154030960ab83eaeff6ad8805820e5f33ff97af5871227f92f
all runs: OK
false negative chance: 0.000
minimized to 420 configs; suspects: [ARCH_ENABLE_MEMORY_HOTREMOVE ATM BCMA BLK_DEV_ZONED BPF_SYSCALL CARDBUS CFG80211 CFG80211_WEXT CMA CONTIG_ALLOC CRYPTO_842 CRYPTO_LZ4 CRYPTO_LZ4HC CRYPTO_LZO CRYPTO_ZSTD DVB_CORE EXTCON FB FRONTSWAP GPIOLIB HID_ZEROPLUS I2C_MUX IIO IRQ_REMAP LIBNVDIMM MEDIA_ANALOG_TV_SUPPORT MEDIA_CAMERA_SUPPORT MEDIA_CEC_SUPPORT MEDIA_CONTROLLER MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTPLUG_SPARSE MEMORY_HOTREMOVE MFD_VIPERBOARD NOP_USB_XCEIV PARPORT PCCARD PCMCIA PHONET RADIO_ADAPTERS RADIO_SI470X RADIO_SI4713 RC_CORE RFKILL SND SOUND SPI SSB TAP TARGET_CORE TUN USB_AMD5536UDC USB_ATM USB_CHIPIDEA USB_CHIPIDEA_GENERIC USB_CHIPIDEA_HOST USB_CHIPIDEA_IMX USB_CHIPIDEA_MSM USB_CHIPIDEA_PCI USB_CHIPIDEA_TEGRA USB_CHIPIDEA_UDC USB_CONFIGFS USB_CONFIGFS_ACM USB_CONFIGFS_ECM USB_CONFIGFS_ECM_SUBSET USB_CONFIGFS_EEM USB_CONFIGFS_F_FS USB_CONFIGFS_F_HID USB_CONFIGFS_F_LB_SS USB_CONFIGFS_F_MIDI USB_CONFIGFS_F_PRINTER USB_CONFIGFS_F_TCM USB_CONFIGFS_F_UAC1 USB_CONFIGFS_F_UAC1_LEGACY USB_CONFIGFS_F_UAC2 USB_CONFIGFS_F_UVC USB_CONFIGFS_MASS_STORAGE USB_CONFIGFS_NCM USB_CONFIGFS_OBEX USB_CONFIGFS_PHONET USB_CONFIGFS_RNDIS USB_CONFIGFS_SERIAL USB_CONN_GPIO USB_CXACRU USB_CYPRESS_CY7C63 USB_CYTHERM USB_DSBR USB_DUMMY_HCD USB_DWC2 USB_DWC2_HOST USB_DWC2_PCI USB_DWC3 USB_DWC3_GADGET USB_DWC3_HAPS USB_DWC3_OF_SIMPLE USB_DWC3_PCI USB_DWC3_ULPI USB_DYNAMIC_MINORS USB_EG20T USB_EHCI_FSL USB_EHCI_HCD_PLATFORM USB_EHCI_ROOT_HUB_TT USB_EHSET_TEST_FIXTURE USB_EMI26 USB_EMI62 USB_EPSON2888 USB_EZUSB_FX2 USB_FEW_INIT_RETRIES USB_FOTG210_HCD USB_FOTG210_UDC USB_FTDI_ELAN USB_F_ACM USB_F_ECM USB_F_EEM USB_F_FS USB_F_HID USB_F_MASS_STORAGE USB_F_MIDI USB_F_NCM USB_F_OBEX USB_F_PHONET USB_F_PRINTER USB_F_RNDIS USB_F_SERIAL USB_F_SS_LB USB_F_SUBSET USB_F_TCM USB_F_UAC1 USB_F_UAC1_LEGACY USB_F_UAC2 USB_F_UVC USB_GADGET USB_GADGETFS USB_GADGET_DEBUG_FILES USB_GADGET_DEBUG_FS 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USB_ISP116X_HCD USB_ISP1301 USB_ISP1760 USB_ISP1760_DUAL_ROLE USB_ISP1760_HCD USB_ISP1761_UDC USB_KAWETH USB_KC2190 USB_KEENE USB_LAN78XX USB_LCD USB_LD USB_LEDS_TRIGGER_USBPORT USB_LED_TRIG USB_LEGOTOWER USB_LGM_PHY USB_LIBCOMPOSITE USB_LINK_LAYER_TEST USB_M5602 USB_MA901 USB_MAX3420_UDC USB_MAX3421_HCD USB_MDC800 USB_MICROTEK USB_MR800 USB_MSI2500 USB_MUSB_DUAL_ROLE USB_MUSB_HDRC USB_MV_U3D USB_MV_UDC USB_NET2272 USB_NET2272_DMA USB_NET2280 USB_NET_AQC111 USB_NET_AX88179_178A USB_NET_AX8817X USB_NET_CDCETHER USB_NET_CDC_EEM USB_NET_CDC_MBIM USB_NET_CDC_NCM USB_NET_CDC_SUBSET USB_NET_CDC_SUBSET_ENABLE USB_NET_CH9200 USB_NET_CX82310_ETH USB_NET_DM9601 USB_NET_GL620A USB_NET_HUAWEI_CDC_NCM USB_NET_INT51X1 USB_NET_KALMIA USB_NET_MCS7830 USB_NET_NET1080 USB_NET_PLUSB USB_NET_QMI_WWAN USB_NET_RNDIS_HOST USB_NET_RNDIS_WLAN USB_NET_SMSC75XX USB_NET_SMSC95XX USB_NET_SR9700 USB_NET_SR9800 USB_NET_ZAURUS USB_OHCI_HCD_PLATFORM USB_OTG USB_OTG_FSM USB_OXU210HP_HCD USB_PEGASUS USB_PULSE8_CEC USB_PWC USB_PWC_INPUT_EVDEV USB_PXA27X USB_R8A66597 USB_R8A66597_HCD USB_RAINSHADOW_CEC USB_RAREMONO USB_RAW_GADGET USB_RTL8150 USB_RTL8152 USB_RTL8153_ECM USB_S2255 USB_SERIAL USB_SERIAL_AIRCABLE USB_SERIAL_ARK3116 USB_SERIAL_BELKIN USB_SERIAL_CH341 USB_SERIAL_CONSOLE USB_SERIAL_CP210X USB_SERIAL_CYBERJACK USB_SERIAL_CYPRESS_M8 USB_SERIAL_DEBUG USB_SERIAL_DIGI_ACCELEPORT USB_SERIAL_EDGEPORT USB_SERIAL_EDGEPORT_TI USB_SERIAL_EMPEG USB_SERIAL_F81232 USB_SERIAL_F8153X USB_SERIAL_FTDI_SIO USB_SERIAL_GARMIN USB_SERIAL_GENERIC USB_SERIAL_IPAQ USB_SERIAL_IPW USB_SERIAL_IR USB_SERIAL_IUU USB_SERIAL_KEYSPAN USB_SERIAL_KEYSPAN_PDA USB_SERIAL_KLSI USB_SERIAL_KOBIL_SCT USB_SERIAL_MCT_U232 USB_SERIAL_METRO USB_SERIAL_MOS7715_PARPORT USB_SERIAL_MOS7720 USB_SERIAL_MOS7840 USB_SERIAL_MXUPORT USB_SERIAL_NAVMAN USB_SERIAL_OMNINET USB_SERIAL_OPTICON USB_SERIAL_OPTION USB_SERIAL_OTI6858 USB_SERIAL_PL2303 USB_SERIAL_QCAUX USB_SERIAL_QT2 USB_SERIAL_QUALCOMM USB_SERIAL_SAFE USB_SERIAL_SIERRAWIRELESS 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testing current HEAD cc5ec87693063acebb60f587e8a019ba9b94ae0e
testing commit cc5ec87693063acebb60f587e8a019ba9b94ae0e gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 2f6c283bd100129ecb9b305bde5aa24d602c7b2b07ffa058a1c271efecafc585
run #0: crashed: WARNING in bpf_probe_read_user
run #1: crashed: WARNING in bpf_probe_read_user
run #2: crashed: WARNING in bpf_probe_read_user
run #3: crashed: WARNING in bpf_probe_read_user
run #4: crashed: WARNING in bpf_probe_read_user
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
representative crash: WARNING in bpf_probe_read_user, types: [WARNING]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 2h33m58.080554615s (build: 1h14m34.544889724s, test: 1h16m21.343472087s)
crash still not fixed or there were kernel test errors
commit msg: Linux 5.15.196
crash: WARNING in bpf_probe_read_user
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4549 at mm/maccess.c:226 copy_from_user_nofault+0x5d/0x170 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 4549 Comm: syz.2.617 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:copy_from_user_nofault+0x5d/0x170 mm/maccess.c:226
Code: 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e fc 00 00 00 41 8b 85 80 16 00 00 85 c0 75 02 <0f> 0b 4c 89 e0 48 01 e8 0f 82 b8 00 00 00 48 ba 00 f0 ff ff ff 7f
RSP: 0018:ffffc90000007bd0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffffc90000007cc0 RCX: 0000000000000000
RDX: 1ffff110237a8668 RSI: 0000000000000000 RDI: ffff88811bd43340
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8aa67fe7
R10: fffffbfff154cffc R11: 0000000000000001 R12: 0000000000000008
R13: ffff88811bd41cc0 R14: ffffc90000007ce8 R15: ffffffff8145e900
FS: 0000555561474500(0000) GS:ffff8881f6200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c005771000 CR3: 0000000125ca2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
bpf_probe_read_user_common kernel/trace/bpf_trace.c:157 [inline]
____bpf_probe_read_user kernel/trace/bpf_trace.c:166 [inline]
bpf_probe_read_user+0x18/0x40 kernel/trace/bpf_trace.c:163
___bpf_prog_run+0x2fd0/0x74f0 kernel/bpf/core.c:1568
__bpf_prog_run32+0x79/0xb0 kernel/bpf/core.c:1788
bpf_dispatcher_nop_func include/linux/bpf.h:888 [inline]
__bpf_prog_run include/linux/filter.h:628 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1878 [inline]
bpf_trace_run2+0xe9/0x280 kernel/trace/bpf_trace.c:1915
trace_hrtimer_start include/trace/events/timer.h:199 [inline]
debug_activate kernel/time/hrtimer.c:466 [inline]
enqueue_hrtimer+0x209/0x2a0 kernel/time/hrtimer.c:1069
__run_hrtimer kernel/time/hrtimer.c:1702 [inline]
__hrtimer_run_queues+0x7d1/0x940 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x2c1/0x730 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
__sysvec_apic_timer_interrupt+0xf5/0x340 arch/x86/kernel/apic/apic.c:1114
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0x65/0x90 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:lock_acquire+0x1d5/0x4b0 kernel/locking/lockdep.c:5591
Code: 75 db 7e 83 f8 01 0f 85 78 02 00 00 9c 58 f6 c4 02 0f 85 63 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc90001c57d30 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff9200038afa8 RCX: 0000000000079493
RDX: 1ffff110237a84ec RSI: 0000000000000001 RDI: ffffffff87dfb238
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8aa67ff7
R10: fffffbfff154cffe R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888117a9fcd8 R15: 0000000000000000
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x27/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:364 [inline]
pick_file+0x20/0x1b0 fs/file.c:623
__range_close fs/file.c:689 [inline]
__close_range+0x229/0x3d0 fs/file.c:747
__do_sys_close_range fs/open.c:1408 [inline]
__se_sys_close_range fs/open.c:1405 [inline]
__x64_sys_close_range+0x6a/0xb0 fs/open.c:1405
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x33/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f8692aa8be9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd4022ea48 EFLAGS: 00000246
ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 0000000000013c39 RCX: 00007f8692aa8be9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f8692ce1da0 R08: 0000000000000001 R09: 000000034022ed3f
R10: 0000001b31c20000 R11: 0000000000000246 R12: 00007f8692cdffac
R13: 00007f8692cdffa0 R14: ffffffffffffffff R15: 00007ffd4022eb60
irq event stamp: 1550
hardirqs last enabled at (1549): [] syscall_enter_from_user_mode+0x21/0x70 kernel/entry/common.c:113
hardirqs last disabled at (1550): [] sysvec_apic_timer_interrupt+0xb/0x90 arch/x86/kernel/apic/apic.c:1108
softirqs last enabled at (1366): [] fpu_clone+0x11b/0x370 arch/x86/kernel/fpu/core.c:260
softirqs last disabled at (1364): [] fpu_clone+0x79/0x370 arch/x86/kernel/fpu/core.c:251
---[ end trace 031ec0a4699b8f4e ]---
----------------
Code disassembly (best guess):
0: 75 db jne 0xffffffdd
2: 7e 83 jle 0xffffff87
4: f8 clc
5: 01 0f add %ecx,(%rdi)
7: 85 78 02 test %edi,0x2(%rax)
a: 00 00 add %al,(%rax)
c: 9c pushf
d: 58 pop %rax
e: f6 c4 02 test $0x2,%ah
11: 0f 85 63 02 00 00 jne 0x27a
17: 48 83 7c 24 08 00 cmpq $0x0,0x8(%rsp)
1d: 74 01 je 0x20
1f: fb sti
20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
27: fc ff df
* 2a: 48 01 c3 add %rax,%rbx <-- trapping instruction
2d: 48 c7 03 00 00 00 00 movq $0x0,(%rbx)
34: 48 c7 43 08 00 00 00 movq $0x0,0x8(%rbx)
3b: 00
3c: 48 rex.W
3d: 8b .byte 0x8b
3e: 84 .byte 0x84
3f: 24 .byte 0x24