ci2 starts bisection 2024-04-08 07:56:34.561545946 +0000 UTC m=+194242.519359363 bisecting fixing commit since f1bb70486c9c11d7e2d55240d4557f9fc575fbac building syzkaller on 6404acf9ce200d01fcbe0923924c9f6c22c258de ensuring issue is reproducible on original commit f1bb70486c9c11d7e2d55240d4557f9fc575fbac testing commit f1bb70486c9c11d7e2d55240d4557f9fc575fbac gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f9ff373483a810c6dc6dde246fe0575c252277c41b1477f352ccfb9e858825fa all runs: crashed: BUG: unable to handle kernel paging request in bpf_probe_read_kernel_str representative crash: BUG: unable to handle kernel paging request in bpf_probe_read_kernel_str, types: [UNKNOWN] check whether we can drop unnecessary instrumentation disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit f1bb70486c9c11d7e2d55240d4557f9fc575fbac gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7421e6026c32cbdcdfed401b87226405bf243ad688d9b62f8fa5a78d67cf9f2e all runs: crashed: BUG: unable to handle kernel paging request in bpf_probe_read_kernel_str representative crash: BUG: unable to handle kernel paging request in bpf_probe_read_kernel_str, types: [UNKNOWN] the bug reproduces without the instrumentation disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed kconfig minimization: base=3820 full=7455 leaves diff=1990 split chunks (needed=false): <1990> split chunk #0 of len 1990 into 5 parts testing without sub-chunk 1/5 disabling configs for [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit f1bb70486c9c11d7e2d55240d4557f9fc575fbac gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d7bf2af5b234d98156978183e236523808c089423c9de48b0367dd163717d7d2 all runs: crashed: BUG: unable to handle kernel paging request in bpf_probe_read_kernel_str representative crash: BUG: unable to handle kernel paging request in bpf_probe_read_kernel_str, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit f1bb70486c9c11d7e2d55240d4557f9fc575fbac gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 49b4f7af88c706620cef086ff86cbee5338b4f275ee9487306947b221ef028f8 all runs: crashed: BUG: unable to handle kernel paging request in bpf_probe_read_kernel_str representative crash: BUG: unable to handle kernel paging request in bpf_probe_read_kernel_str, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN LOCKDEP], they are not needed testing commit f1bb70486c9c11d7e2d55240d4557f9fc575fbac gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 217a72706c0cfd194d0a845c02375d8b639f343070997401da28935800a097b5 all runs: crashed: BUG: unable to handle kernel paging request in bpf_probe_read_kernel_str representative crash: BUG: unable to handle kernel paging request in bpf_probe_read_kernel_str, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit f1bb70486c9c11d7e2d55240d4557f9fc575fbac gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e05725b789e6fbbf0869c9f458c64181f6026c5c44b4877e5cad3fefe0910464 all runs: crashed: BUG: unable to handle kernel paging request in bpf_probe_read_kernel_str representative crash: BUG: unable to handle kernel paging request in bpf_probe_read_kernel_str, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit f1bb70486c9c11d7e2d55240d4557f9fc575fbac gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b2f27819e92385c2203ba5424a15d833c5d456dab88993f6db782f626e7bf448 all runs: OK false negative chance: 0.000 minimized to 398 configs; suspects: [ARCH_ENABLE_MEMORY_HOTREMOVE ATM BCMA BLK_DEV_ZONED BPF_SYSCALL CARDBUS CFG80211 CFG80211_WEXT CMA COMMON_CLK CONTIG_ALLOC CRYPTO_842 CRYPTO_LZ4 CRYPTO_LZ4HC CRYPTO_LZO CRYPTO_ZSTD DVB_CORE EXTCON FB GPIOLIB HID_ZEROPLUS I2C_MUX IIO IRQ_REMAP KVM KVM_INTEL 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_HOTREMOVE MFD_VIPERBOARD 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_CONFIGFS 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_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_OF_SIMPLE USB_DWC3_PCI USB_DWC3_ULPI USB_DYNAMIC_MINORS USB_EG20T 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 USB_GL860 USB_GOKU USB_GPIO_VBUS USB_GR_UDC USB_GSPCA USB_GSPCA_BENQ USB_GSPCA_CONEX USB_GSPCA_CPIA1 USB_GSPCA_DTCS033 USB_GSPCA_ETOMS USB_GSPCA_FINEPIX USB_GSPCA_JEILINJ USB_GSPCA_JL2005BCD USB_GSPCA_KINECT USB_GSPCA_KONICA USB_GSPCA_MARS USB_GSPCA_MR97310A USB_GSPCA_NW80X USB_GSPCA_OV519 USB_GSPCA_OV534 USB_GSPCA_OV534_9 USB_GSPCA_PAC207 USB_GSPCA_PAC7302 USB_GSPCA_PAC7311 USB_GSPCA_SE401 USB_GSPCA_SN9C2028 USB_GSPCA_SN9C20X USB_GSPCA_SONIXB USB_GSPCA_SONIXJ USB_GSPCA_SPCA1528 USB_GSPCA_SPCA500 USB_GSPCA_SPCA501 USB_GSPCA_SPCA505 USB_GSPCA_SPCA506 USB_GSPCA_SPCA508 USB_GSPCA_SPCA561 USB_GSPCA_SQ905 USB_GSPCA_SQ905C USB_GSPCA_SQ930X USB_GSPCA_STK014 USB_GSPCA_STK1135 USB_GSPCA_STV0680 USB_GSPCA_SUNPLUS USB_GSPCA_T613 USB_GSPCA_TOPRO USB_GSPCA_TOUPTEK USB_GSPCA_TV8532 USB_GSPCA_VC032X USB_GSPCA_VICAM USB_GSPCA_XIRLINK_CIT USB_GSPCA_ZC3XX USB_HACKRF USB_HCD_BCMA USB_HCD_SSB USB_HSIC_USB3503 USB_HSIC_USB4604 USB_HSO USB_HUB_USB251XB USB_IDMOUSE USB_IOWARRIOR USB_IPHETH USB_ISIGHTFW 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_LIBCOMPOSITE USB_LINK_LAYER_TEST USB_M5602 USB_MA901 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_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 USB_SERIAL_SIMPLE USB_SERIAL_SPCP8X5 USB_SERIAL_SSU100 USB_SERIAL_SYMBOL USB_SERIAL_TI USB_SERIAL_UPD78F0730 USB_SERIAL_VISOR USB_SERIAL_WHITEHEAT USB_SERIAL_WISHBONE USB_SERIAL_WWAN USB_SERIAL_XR USB_SERIAL_XSENS_MT USB_SEVSEG USB_SI470X USB_SI4713 USB_SIERRA_NET USB_SISUSBVGA USB_SL811_CS USB_SL811_HCD USB_SL811_HCD_ISO USB_SNP_CORE USB_SPEEDTOUCH USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_ENE_UB6250 USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_STV06XX USB_TEST USB_TMC USB_TRANCEVIBRATOR USB_U132_HCD USB_UAS USB_UEAGLEATM USB_ULPI_BUS USB_USBNET USB_USS720 USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_VIDEO_CLASS USB_VIDEO_CLASS_INPUT_EVDEV USB_VL600 USB_WDM USB_XHCI_DBGCAP USB_XHCI_PLATFORM USB_XUSBATM USB_YUREX USERFAULTFD USERIO USERMODE_DRIVER USER_RETURN_NOTIFIER U_SERIAL_CONSOLE V4L2_MEM2MEM_DEV V4L_TEST_DRIVERS VALIDATE_FS_PARSER VDPA VDPA_SIM VDPA_SIM_BLOCK VDPA_SIM_NET VDPA_USER VETH VFIO VFIO_IOMMU_TYPE1 VFIO_PCI VFIO_PCI_CORE VFIO_PCI_INTX VFIO_PCI_MMAP VFIO_VIRQFD VGASTATE VHOST VHOST_CROSS_ENDIAN_LEGACY VHOST_IOTLB VHOST_NET VHOST_RING VHOST_VDPA VHOST_VSOCK VIDEOBUF2_CORE VIDEOBUF2_DMA_CONTIG VIDEOBUF2_DMA_SG VIDEOBUF2_MEMOPS VIDEOBUF2_V4L2 VIDEOBUF2_VMALLOC VIDEOMODE_HELPERS VIDEO_AU0828 VIDEO_AU0828_RC VIDEO_AU0828_V4L2 VIDEO_CS53L32A VIDEO_CX231XX VIDEO_CX231XX_ALSA VIDEO_CX231XX_DVB VIDEO_CX231XX_RC VIDEO_CX2341X VIDEO_CX25840 VIDEO_DEV VIDEO_EM28XX VIDEO_EM28XX_ALSA VIDEO_EM28XX_DVB VIDEO_EM28XX_RC VIDEO_EM28XX_V4L2 VIDEO_GO7007 VIDEO_GO7007_LOADER VIDEO_GO7007_USB VIDEO_GO7007_USB_S2250_BOARD VIDEO_HDPVR VIDEO_MSP3400 VIDEO_PVRUSB2 VIDEO_PVRUSB2_DVB VIDEO_PVRUSB2_SYSFS VIDEO_SAA711X VIDEO_STK1160 VIDEO_STK1160_COMMON VIDEO_TUNER VIDEO_TVEEPROM VIDEO_USBTV VIDEO_V4L2_I2C VIDEO_V4L2_SUBDEV_API VIDEO_V4L2_TPG VIDEO_VICODEC VIDEO_VIM2M VIDEO_VIMC VIDEO_VIVID VIDEO_VIVID_CEC VIDEO_WM8775 VIPERBOARD_ADC VIRTIO_BALLOON VIRTIO_DMA_SHARED_BUFFER VIRTIO_MEM VIRTIO_MMIO VIRTIO_MMIO_CMDLINE_DEVICES VIRTIO_PMEM VIRTIO_VDPA VIRTIO_VSOCKETS VIRTIO_VSOCKETS_COMMON VIRT_WIFI VLAN_8021Q VLAN_8021Q_GVRP VLAN_8021Q_MVRP VMAP_PFN VMWARE_VMCI VMXNET3 VP_VDPA VSOCKETS VSOCKETS_DIAG VSOCKETS_LOOPBACK VSOCKMON VT_HW_CONSOLE_BINDING VXFS_FS WANT_DEV_COREDUMP WEXT_CORE WEXT_PRIV WEXT_PROC WIREGUARD WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ADMTEK WLAN_VENDOR_PURELIFI WLAN_VENDOR_SILABS X86_SGX X86_SGX_KVM X86_X2APIC X86_X32_ABI XARRAY_MULTI XDP_SOCKETS XDP_SOCKETS_DIAG XFRM_ESPINTCP XFRM_INTERFACE XFRM_IPCOMP XFRM_MIGRATE XFRM_OFFLOAD XFRM_STATISTICS XFRM_SUB_POLICY XFRM_USER_COMPAT XFS_FS XFS_POSIX_ACL XFS_QUOTA XFS_RT XOR_BLOCKS YENTA YENTA_ENE_TUNE YENTA_O2 YENTA_RICOH YENTA_TI YENTA_TOSHIBA ZBUD ZEROPLUS_FF ZLIB_DEFLATE ZONEFS_FS ZPOOL ZRAM ZRAM_DEF_COMP_LZORLE ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_LZO ZSWAP_DEFAULT_ON ZSWAP_ZPOOL_DEFAULT_ZBUD] disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing current HEAD 347385861c50adc8d4801d4b899eded38a2f04cd testing commit 347385861c50adc8d4801d4b899eded38a2f04cd gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2c088efada06d45afa587c6d29249f3a4356580625358d8fbe00539aae902b4e all runs: OK false negative chance: 0.000 # git bisect start 347385861c50adc8d4801d4b899eded38a2f04cd f1bb70486c9c11d7e2d55240d4557f9fc575fbac Bisecting: 727 revisions left to test after this (roughly 10 steps) [a28f4d1e0bed85943d309ac243fd1c200f8af9a2] drm/amdgpu: Reset IH OVERFLOW_CLEAR bit determine whether the revision contains the guilty commit revision f1bb70486c9c11d7e2d55240d4557f9fc575fbac crashed and is reachable testing commit a28f4d1e0bed85943d309ac243fd1c200f8af9a2 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f983409eab63c11ccdeebd8f999a53c57eb8c30b35da4d5ab235bc5398d2e80e all runs: crashed: BUG: unable to handle kernel paging request in bpf_probe_read_kernel_str representative crash: BUG: unable to handle kernel paging request in bpf_probe_read_kernel_str, types: [UNKNOWN] # git bisect good a28f4d1e0bed85943d309ac243fd1c200f8af9a2 Bisecting: 363 revisions left to test after this (roughly 9 steps) [3c2e2c8059da54cab89bc6f7973cba821406a83e] f2fs: delete obsolete FI_DROP_CACHE determine whether the revision contains the guilty commit revision f1bb70486c9c11d7e2d55240d4557f9fc575fbac crashed and is reachable testing commit 3c2e2c8059da54cab89bc6f7973cba821406a83e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6bd41b48c2709848c60a05c6fc603cf65beba461ba48882baa59fcd712027a25 all runs: OK false negative chance: 0.000 # git bisect bad 3c2e2c8059da54cab89bc6f7973cba821406a83e Bisecting: 181 revisions left to test after this (roughly 8 steps) [db6e5e16f1ee9e3b01d2f71c7f0ba945f4bf0f4e] pstore: inode: Only d_invalidate() is needed determine whether the revision contains the guilty commit revision f1bb70486c9c11d7e2d55240d4557f9fc575fbac crashed and is reachable testing commit db6e5e16f1ee9e3b01d2f71c7f0ba945f4bf0f4e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7fedb0caa3f778317d5457e1117ba163305f9e207566935a1490db3a6f64b87b all runs: OK false negative chance: 0.000 # git bisect bad db6e5e16f1ee9e3b01d2f71c7f0ba945f4bf0f4e Bisecting: 90 revisions left to test after this (roughly 7 steps) [3e5e8248c0a4cd9d6e75208b21ff31ce5265e906] x86/sme: Fix memory encryption setting if enabled by default and not overridden determine whether the revision contains the guilty commit revision f1bb70486c9c11d7e2d55240d4557f9fc575fbac crashed and is reachable testing commit 3e5e8248c0a4cd9d6e75208b21ff31ce5265e906 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 18979f9f28950aea68e6b2ba508bc730b841b47c6d14d0346144c1d5e62a11fb all runs: OK false negative chance: 0.000 # git bisect bad 3e5e8248c0a4cd9d6e75208b21ff31ce5265e906 Bisecting: 45 revisions left to test after this (roughly 6 steps) [6d4c7bd6dc35427b76b16bd69e5552af53c11d5b] RDMA/mlx5: Relax DEVX access upon modify commands determine whether the revision contains the guilty commit revision f1bb70486c9c11d7e2d55240d4557f9fc575fbac crashed and is reachable testing commit 6d4c7bd6dc35427b76b16bd69e5552af53c11d5b gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 98e8f8d4e832e8b9e550554a6f2174708b209ec51331284bc453a75eeaf403ec all runs: crashed: BUG: unable to handle kernel paging request in bpf_probe_read_kernel_str representative crash: BUG: unable to handle kernel paging request in bpf_probe_read_kernel_str, types: [UNKNOWN] # git bisect good 6d4c7bd6dc35427b76b16bd69e5552af53c11d5b Bisecting: 22 revisions left to test after this (roughly 5 steps) [d575eb8747d6f748805187a49a614a152021728c] Input: gpio_keys_polled - suppress deferred probe error for gpio determine whether the revision contains the guilty commit revision 6d4c7bd6dc35427b76b16bd69e5552af53c11d5b crashed and is reachable testing commit d575eb8747d6f748805187a49a614a152021728c gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 250b73c11b8ccef07b50a488cccf5f5088000a050d6692699975e22c4277dde8 all runs: OK false negative chance: 0.000 # git bisect bad d575eb8747d6f748805187a49a614a152021728c Bisecting: 11 revisions left to test after this (roughly 4 steps) [80656ee2baa7d7b86834c6de2ce8ca19e403edfc] net: smsc95xx: add support for SYS TEC USB-SPEmodule1 determine whether the revision contains the guilty commit revision f1bb70486c9c11d7e2d55240d4557f9fc575fbac crashed and is reachable testing commit 80656ee2baa7d7b86834c6de2ce8ca19e403edfc gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2139f204a744a9ea276748404bdd1011072d573ef433e2cab76a64d908831553 all runs: OK false negative chance: 0.000 # git bisect bad 80656ee2baa7d7b86834c6de2ce8ca19e403edfc Bisecting: 5 revisions left to test after this (roughly 3 steps) [4492f21263186a84237f3167aed7b0cb455869c5] parisc/ftrace: add missing CONFIG_DYNAMIC_FTRACE check determine whether the revision contains the guilty commit revision 6d4c7bd6dc35427b76b16bd69e5552af53c11d5b crashed and is reachable testing commit 4492f21263186a84237f3167aed7b0cb455869c5 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 778d1bd65f681bac7e412868a1955d90642423863752cae787046d7a3ca0de41 all runs: OK false negative chance: 0.000 # git bisect bad 4492f21263186a84237f3167aed7b0cb455869c5 Bisecting: 2 revisions left to test after this (roughly 1 step) [46c8615de5bf7ee2076750bd3024e5912d7ee4eb] x86/mm: Move is_vsyscall_vaddr() into asm/vsyscall.h determine whether the revision contains the guilty commit revision 6d4c7bd6dc35427b76b16bd69e5552af53c11d5b crashed and is reachable testing commit 46c8615de5bf7ee2076750bd3024e5912d7ee4eb gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b180412fa4306d9e03c187aca11c62d6fe0b78775f0e6ee9253c00f00f27596d all runs: crashed: BUG: unable to handle kernel paging request in bpf_probe_read_kernel_str representative crash: BUG: unable to handle kernel paging request in bpf_probe_read_kernel_str, types: [UNKNOWN] # git bisect good 46c8615de5bf7ee2076750bd3024e5912d7ee4eb Bisecting: 0 revisions left to test after this (roughly 1 step) [05896c8ff4ed16ce622169c072046f8b86d8cde7] net/iucv: fix the allocation size of iucv_path_table array determine whether the revision contains the guilty commit revision a28f4d1e0bed85943d309ac243fd1c200f8af9a2 crashed and is reachable testing commit 05896c8ff4ed16ce622169c072046f8b86d8cde7 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fb9d44e8ace52d0f89ce098f62448a07c76d931caa5333316421eb0e01b0482c all runs: OK false negative chance: 0.000 # git bisect bad 05896c8ff4ed16ce622169c072046f8b86d8cde7 Bisecting: 0 revisions left to test after this (roughly 0 steps) [f175de546a3eb77614d94d4c02550181c0a8493e] x86/mm: Disallow vsyscall page read for copy_from_kernel_nofault() determine whether the revision contains the guilty commit revision f1bb70486c9c11d7e2d55240d4557f9fc575fbac crashed and is reachable testing commit f175de546a3eb77614d94d4c02550181c0a8493e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 168969ec9cda858e2f9f8c3ad05831c79c7be9824f2b1cff4e7c8498ef0ea326 all runs: OK false negative chance: 0.000 # git bisect bad f175de546a3eb77614d94d4c02550181c0a8493e f175de546a3eb77614d94d4c02550181c0a8493e is the first bad commit commit f175de546a3eb77614d94d4c02550181c0a8493e Author: Hou Tao Date: Fri Feb 2 18:39:34 2024 +0800 x86/mm: Disallow vsyscall page read for copy_from_kernel_nofault() [ Upstream commit 32019c659ecfe1d92e3bf9fcdfbb11a7c70acd58 ] When trying to use copy_from_kernel_nofault() to read vsyscall page through a bpf program, the following oops was reported: BUG: unable to handle page fault for address: ffffffffff600000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 3231067 P4D 3231067 PUD 3233067 PMD 3235067 PTE 0 Oops: 0000 [#1] PREEMPT SMP PTI CPU: 1 PID: 20390 Comm: test_progs ...... 6.7.0+ #58 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) ...... RIP: 0010:copy_from_kernel_nofault+0x6f/0x110 ...... Call Trace: ? copy_from_kernel_nofault+0x6f/0x110 bpf_probe_read_kernel+0x1d/0x50 bpf_prog_2061065e56845f08_do_probe_read+0x51/0x8d trace_call_bpf+0xc5/0x1c0 perf_call_bpf_enter.isra.0+0x69/0xb0 perf_syscall_enter+0x13e/0x200 syscall_trace_enter+0x188/0x1c0 do_syscall_64+0xb5/0xe0 entry_SYSCALL_64_after_hwframe+0x6e/0x76 ...... ---[ end trace 0000000000000000 ]--- The oops is triggered when: 1) A bpf program uses bpf_probe_read_kernel() to read from the vsyscall page and invokes copy_from_kernel_nofault() which in turn calls __get_user_asm(). 2) Because the vsyscall page address is not readable from kernel space, a page fault exception is triggered accordingly. 3) handle_page_fault() considers the vsyscall page address as a user space address instead of a kernel space address. This results in the fix-up setup by bpf not being applied and a page_fault_oops() is invoked due to SMAP. Considering handle_page_fault() has already considered the vsyscall page address as a userspace address, fix the problem by disallowing vsyscall page read for copy_from_kernel_nofault(). Originally-by: Thomas Gleixner Reported-by: syzbot+72aa0161922eba61b50e@syzkaller.appspotmail.com Closes: https://lore.kernel.org/bpf/CAG48ez06TZft=ATH1qh2c5mpS5BT8UakwNkzi6nvK5_djC-4Nw@mail.gmail.com Reported-by: xingwei lee Closes: https://lore.kernel.org/bpf/CABOYnLynjBoFZOf3Z4BhaZkc5hx_kHfsjiW+UWLoB=w33LvScw@mail.gmail.com Signed-off-by: Hou Tao Reviewed-by: Sohil Mehta Acked-by: Thomas Gleixner Link: https://lore.kernel.org/r/20240202103935.3154011-3-houtao@huaweicloud.com Signed-off-by: Alexei Starovoitov Signed-off-by: Sasha Levin arch/x86/mm/maccess.c | 10 ++++++++++ 1 file changed, 10 insertions(+) accumulated error probability: 0.00 culprit signature: 168969ec9cda858e2f9f8c3ad05831c79c7be9824f2b1cff4e7c8498ef0ea326 parent signature: b180412fa4306d9e03c187aca11c62d6fe0b78775f0e6ee9253c00f00f27596d revisions tested: 19, total time: 4h30m38.421634329s (build: 1h49m3.341805567s, test: 2h35m6.40422794s) first good commit: f175de546a3eb77614d94d4c02550181c0a8493e x86/mm: Disallow vsyscall page read for copy_from_kernel_nofault() recipients (to): ["ast@kernel.org" "houtao1@huawei.com" "sashal@kernel.org" "sohil.mehta@intel.com" "tglx@linutronix.de"] recipients (cc): []