ci2 starts bisection 2024-04-08 03:03:24.145882054 +0000 UTC m=+176652.103695491 bisecting fixing commit since 6139f2a02fe0ac7a08389b4eb786e0c659039ddd building syzkaller on 60bf9982e3c5f47dee643bd88d86c7f0b631e32d ensuring issue is reproducible on original commit 6139f2a02fe0ac7a08389b4eb786e0c659039ddd testing commit 6139f2a02fe0ac7a08389b4eb786e0c659039ddd gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 420511dfb2718579d0e0f3afe4349d2c92510841fb5c6cebd84d1ff399f5c050 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 [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit 6139f2a02fe0ac7a08389b4eb786e0c659039ddd gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 07117c2c0716c090763db2d0e9166efb7145ca75c7cbd4bcdc69fd6d9d4b5874 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 [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed kconfig minimization: base=3703 full=7266 leaves diff=1981 split chunks (needed=false): <1981> split chunk #0 of len 1981 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 6139f2a02fe0ac7a08389b4eb786e0c659039ddd gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c8c397fe70de49ea8bc205be87f77d5936e0c5258b74695fdd6f9a3092e2b733 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 [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit 6139f2a02fe0ac7a08389b4eb786e0c659039ddd gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d251fd79f44913e9d316eac1893cbe6b61afbd25085dd302a1c2e0755d3e16c0 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 [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit 6139f2a02fe0ac7a08389b4eb786e0c659039ddd gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b75036a6f7f350d7a871c2316361ead552bf80190c1321d8fc6a4883b6e80435 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 [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit 6139f2a02fe0ac7a08389b4eb786e0c659039ddd gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 84f9d9cb89117624c20c6f15729cc37d6b36bc013e9e89272e73163af317bd7d 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 6139f2a02fe0ac7a08389b4eb786e0c659039ddd gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9244ac58b6f12bf08cdd19c12686268b32047f2976b01f518717f0440588a219 all runs: OK false negative chance: 0.000 minimized to 393 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 PARPORT PCCARD PCMCIA PHONET RADIO_ADAPTERS RADIO_SI470X RADIO_SI4713 RC_CORE RFKILL SND SOUND SPI SSB TAP TUN USB_AMD5536UDC USB_ATM USB_CONFIGFS 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_STKWEBCAM 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 USB_ZR364XX USERFAULTFD USERIO USERMODE_DRIVER USER_RETURN_NOTIFIER U_SERIAL_CONSOLE V4L2_MEM2MEM_DEV V4L_TEST_DRIVERS VALIDATE_FS_PARSER VDPA 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 VIDEOBUF_GEN VIDEOBUF_VMALLOC VIDEO_AU0828 VIDEO_AU0828_RC VIDEO_AU0828_V4L2 VIDEO_CPIA2 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_TM6000 VIDEO_TM6000_ALSA VIDEO_TM6000_DVB VIDEO_TUNER VIDEO_TVEEPROM VIDEO_USBTV VIDEO_V4L2 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 X86_SGX X86_X2APIC X86_X32 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 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 [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing current HEAD 9465fef4ae351749f7068da8c78af4ca27e61928 testing commit 9465fef4ae351749f7068da8c78af4ca27e61928 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 53e96375fc14d5c15c63435bfa576e3f9aa2a4e0c5c1f6467123cc659b57e3d5 all runs: OK false negative chance: 0.000 # git bisect start 9465fef4ae351749f7068da8c78af4ca27e61928 6139f2a02fe0ac7a08389b4eb786e0c659039ddd Bisecting: 588 revisions left to test after this (roughly 9 steps) [83c043b92b0f665607e80a8f9843de5007f1bbf6] powerpc/powernv/ioda: Skip unallocated resources when mapping to PE determine whether the revision contains the guilty commit revision 6139f2a02fe0ac7a08389b4eb786e0c659039ddd crashed and is reachable testing commit 83c043b92b0f665607e80a8f9843de5007f1bbf6 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fea27a1892be70b9361d6ded9d7443c7ef7a56bbbbfb7534433543466504b11b 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 83c043b92b0f665607e80a8f9843de5007f1bbf6 Bisecting: 294 revisions left to test after this (roughly 8 steps) [e524979a8a3bf9c0b6c32e9fc0a898069785f840] gen_compile_commands: fix invalid escape sequence warning determine whether the revision contains the guilty commit revision 6139f2a02fe0ac7a08389b4eb786e0c659039ddd crashed and is reachable testing commit e524979a8a3bf9c0b6c32e9fc0a898069785f840 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6c4e04be25ae2c1845fe004f61422add0d8e5c9a660f0241e21fd7ed0a35f74c 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 e524979a8a3bf9c0b6c32e9fc0a898069785f840 Bisecting: 147 revisions left to test after this (roughly 7 steps) [5eaa1597e2319707c7d4cd052a6f115219d00b8c] drm/ttm: add ttm_resource_fini v2 determine whether the revision contains the guilty commit revision 6139f2a02fe0ac7a08389b4eb786e0c659039ddd crashed and is reachable testing commit 5eaa1597e2319707c7d4cd052a6f115219d00b8c gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9950954699287fb4e3a5d784f8a6408659780d954f273fe57ecf0bfdf869fcac all runs: OK false negative chance: 0.000 # git bisect bad 5eaa1597e2319707c7d4cd052a6f115219d00b8c Bisecting: 73 revisions left to test after this (roughly 6 steps) [f94625ec57477f16dab523f8eda38705ee75bd86] wifi: iwlwifi: mvm: don't set replay counters to 0xff determine whether the revision contains the guilty commit revision 83c043b92b0f665607e80a8f9843de5007f1bbf6 crashed and is reachable testing commit f94625ec57477f16dab523f8eda38705ee75bd86 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fdf4e9a871e52c0bea20626634c8f9f1d8e5d7588ffa1c83ab1846c80cb047ac all runs: OK false negative chance: 0.000 # git bisect bad f94625ec57477f16dab523f8eda38705ee75bd86 Bisecting: 36 revisions left to test after this (roughly 5 steps) [3c1122aee91ea651d362992e13146e12a9064b97] timekeeping: Fix cross-timestamp interpolation for non-x86 determine whether the revision contains the guilty commit revision 6139f2a02fe0ac7a08389b4eb786e0c659039ddd crashed and is reachable testing commit 3c1122aee91ea651d362992e13146e12a9064b97 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7a58071ce519cda7cec4d4bebcba6be7107fbff1231f1385dc71ca6027cc19ab all runs: OK false negative chance: 0.000 # git bisect bad 3c1122aee91ea651d362992e13146e12a9064b97 Bisecting: 17 revisions left to test after this (roughly 4 steps) [2a239a9487f79527e45b2d6c3c8a19df52586bb9] ASoC: wm8962: Enable both SPKOUTR_ENA and SPKOUTL_ENA in mono mode determine whether the revision contains the guilty commit revision 6139f2a02fe0ac7a08389b4eb786e0c659039ddd crashed and is reachable testing commit 2a239a9487f79527e45b2d6c3c8a19df52586bb9 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: bbae5b4f8cce749419fc589176ec00e55cf0b7114287cf7a94a6ac21eab4d5f1 all runs: OK false negative chance: 0.000 # git bisect bad 2a239a9487f79527e45b2d6c3c8a19df52586bb9 Bisecting: 8 revisions left to test after this (roughly 3 steps) [0c255fb9b1a6a77638595015745f9ec249f597e1] dm-verity, dm-crypt: align "struct bvec_iter" correctly determine whether the revision contains the guilty commit revision 6139f2a02fe0ac7a08389b4eb786e0c659039ddd crashed and is reachable testing commit 0c255fb9b1a6a77638595015745f9ec249f597e1 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: bbae5b4f8cce749419fc589176ec00e55cf0b7114287cf7a94a6ac21eab4d5f1 all runs: OK false negative chance: 0.000 # git bisect bad 0c255fb9b1a6a77638595015745f9ec249f597e1 Bisecting: 4 revisions left to test after this (roughly 2 steps) [e2d5cf0dcb9f824fe4e7244ddd24e3dddd7216f2] x86/mm: Move is_vsyscall_vaddr() into asm/vsyscall.h determine whether the revision contains the guilty commit revision e524979a8a3bf9c0b6c32e9fc0a898069785f840 crashed and is reachable testing commit e2d5cf0dcb9f824fe4e7244ddd24e3dddd7216f2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6c4e04be25ae2c1845fe004f61422add0d8e5c9a660f0241e21fd7ed0a35f74c 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 e2d5cf0dcb9f824fe4e7244ddd24e3dddd7216f2 Bisecting: 2 revisions left to test after this (roughly 1 step) [59be50a37f37812688547ae0f9a43947494adf0f] net/iucv: fix the allocation size of iucv_path_table array determine whether the revision contains the guilty commit revision e524979a8a3bf9c0b6c32e9fc0a898069785f840 crashed and is reachable testing commit 59be50a37f37812688547ae0f9a43947494adf0f gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: bbae5b4f8cce749419fc589176ec00e55cf0b7114287cf7a94a6ac21eab4d5f1 all runs: OK false negative chance: 0.000 # git bisect bad 59be50a37f37812688547ae0f9a43947494adf0f Bisecting: 0 revisions left to test after this (roughly 0 steps) [e8a67fe34b76a49320b33032228a794f40b0316b] x86/mm: Disallow vsyscall page read for copy_from_kernel_nofault() determine whether the revision contains the guilty commit revision 6139f2a02fe0ac7a08389b4eb786e0c659039ddd crashed and is reachable testing commit e8a67fe34b76a49320b33032228a794f40b0316b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: bbae5b4f8cce749419fc589176ec00e55cf0b7114287cf7a94a6ac21eab4d5f1 all runs: OK false negative chance: 0.000 # git bisect bad e8a67fe34b76a49320b33032228a794f40b0316b e8a67fe34b76a49320b33032228a794f40b0316b is the first bad commit commit e8a67fe34b76a49320b33032228a794f40b0316b 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: bbae5b4f8cce749419fc589176ec00e55cf0b7114287cf7a94a6ac21eab4d5f1 parent signature: 6c4e04be25ae2c1845fe004f61422add0d8e5c9a660f0241e21fd7ed0a35f74c revisions tested: 18, total time: 4h51m32.071877134s (build: 2h6m22.817488487s, test: 2h41m10.402298549s) first good commit: e8a67fe34b76a49320b33032228a794f40b0316b 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): []