ci starts bisection 2024-10-20 12:04:16.65259855 +0000 UTC m=+167946.785602435 bisecting fixing commit since cbf3a2cb156a2c911d8f38d8247814b4c07f49a2 building syzkaller on 65faba36470e75a1339e6f79c8631c9578786b7b ensuring issue is reproducible on original commit cbf3a2cb156a2c911d8f38d8247814b4c07f49a2 testing commit cbf3a2cb156a2c911d8f38d8247814b4c07f49a2 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7ab7e92df55137693e64df914be17056a048a85ad8d1861a39b31bc3ba2a8650 all runs: crashed: kernel BUG in __page_table_check_zero representative crash: kernel BUG in __page_table_check_zero, types: [BUG] check whether we can drop unnecessary instrumentation disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit cbf3a2cb156a2c911d8f38d8247814b4c07f49a2 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4571b585d8da7654003b9a4463ecf6d785ab43634a3d56e0e870c74dd2853674 all runs: crashed: kernel BUG in __page_table_check_zero representative crash: kernel BUG in __page_table_check_zero, types: [BUG] the bug reproduces without the instrumentation disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed kconfig minimization: base=4037 full=7686 leaves diff=2009 split chunks (needed=false): <2009> split chunk #0 of len 2009 into 5 parts testing without sub-chunk 1/5 disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit cbf3a2cb156a2c911d8f38d8247814b4c07f49a2 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: bd94a467c61c883f82d791b12900b4fb41bf446d42615e8f899b0d5e9124de04 all runs: crashed: kernel BUG in __page_table_check_zero representative crash: kernel BUG in __page_table_check_zero, types: [BUG] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit cbf3a2cb156a2c911d8f38d8247814b4c07f49a2 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9d7de008a1fadce2334d0a015854288aaafad189a82b7b3548e1343cdefea08c all runs: crashed: kernel BUG in __page_table_check_zero representative crash: kernel BUG in __page_table_check_zero, types: [BUG] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN KASAN LOCKDEP], they are not needed testing commit cbf3a2cb156a2c911d8f38d8247814b4c07f49a2 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2bcb38f6f95d705d2f088180257ca7e87b18d69c0eb8efea397a6f97240f02fe all runs: crashed: kernel BUG in __page_table_check_zero representative crash: kernel BUG in __page_table_check_zero, types: [BUG] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit cbf3a2cb156a2c911d8f38d8247814b4c07f49a2 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 83b12c60fca3ac7476b23f7fb53e50e941147e82941e16c1c2641ae376883bad run #0: crashed: kernel BUG in __page_table_check_zero run #1: crashed: kernel BUG in __page_table_check_zero run #2: crashed: kernel BUG in __page_table_check_zero run #3: crashed: kernel BUG in __page_table_check_zero run #4: crashed: kernel BUG in __page_table_check_zero run #5: crashed: kernel BUG in __page_table_check_zero run #6: crashed: kernel BUG in __page_table_check_zero run #7: crashed: kernel BUG in __page_table_check_zero run #8: OK run #9: OK representative crash: kernel BUG in __page_table_check_zero, types: [BUG] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit cbf3a2cb156a2c911d8f38d8247814b4c07f49a2 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: de3c62a6ac74cb3bd2de9ea2dfea93806933bb3b57eb3df614a57c43d95bccf5 all runs: OK false negative chance: 0.000 minimized to 401 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_ZSTD DVB_CORE EXTCON FB GPIOLIB HAVE_KVM HID_ZEROPLUS HW_CONSOLE I2C_MUX IIO IOMMUFD 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_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_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 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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_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 UVC_COMMON U_SERIAL_CONSOLE V4L2_ASYNC V4L2_FWNODE V4L2_MEM2MEM_DEV V4L_TEST_DRIVERS VALIDATE_FS_PARSER VDPA VDPA_SIM VDPA_SIM_BLOCK VDPA_SIM_NET VDPA_USER VETH VFIO VFIO_GROUP 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_TASK 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_CAMERA_SENSOR VIDEO_CMDLINE 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_NOMODESET VIDEO_PVRUSB2 VIDEO_PVRUSB2_DVB VIDEO_PVRUSB2_SYSFS VIDEO_SAA711X VIDEO_STK1160 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_USER_SHADOW_STACK X86_X2APIC X86_X32_ABI 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 XZ_DEC_IA64 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 [UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing current HEAD 715ca9dd687f89ddaac8ec8ccb3b5e5a30311a99 testing commit 715ca9dd687f89ddaac8ec8ccb3b5e5a30311a99 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: dab061ae88f4d28ff17f2ec322368a1df20b4f1e5c91204c1f77ee5c76a94046 all runs: OK false negative chance: 0.000 # git bisect start 715ca9dd687f89ddaac8ec8ccb3b5e5a30311a99 cbf3a2cb156a2c911d8f38d8247814b4c07f49a2 Bisecting: 46914 revisions left to test after this (roughly 16 steps) [f9c035492f2010e1e7aede1f1bd32181d7cef2dc] Merge tag 's390-6.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux determine whether the revision contains the guilty commit revision cbf3a2cb156a2c911d8f38d8247814b4c07f49a2 crashed and is reachable testing commit f9c035492f2010e1e7aede1f1bd32181d7cef2dc gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5717f066fbc65377c1b53d3b53b5cf92b73832b7801b054c89dc77ab6b1f1c9c all runs: boot failed: WARNING: refcount bug in __free_pages_ok unable to determine the verdict: 0 good runs (wanted 5), for bad wanted 5 in total, got 0 # git bisect skip f9c035492f2010e1e7aede1f1bd32181d7cef2dc Bisecting: 46914 revisions left to test after this (roughly 16 steps) [810e6d2fac01ab1e189f3002a364f19bd5d0f444] clk: qcom: clk-alpha-pll: Skip reconfiguring the running Lucid Evo determine whether the revision contains the guilty commit revision f9c035492f2010e1e7aede1f1bd32181d7cef2dc crashed and is reachable testing commit 810e6d2fac01ab1e189f3002a364f19bd5d0f444 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 71ad9ed2681009ab30a32bc7c82af9aa51b800a6f71ab880704704147dc059e3 all runs: boot failed: WARNING: refcount bug in __free_pages_ok unable to determine the verdict: 0 good runs (wanted 5), for bad wanted 5 in total, got 0 # git bisect skip 810e6d2fac01ab1e189f3002a364f19bd5d0f444 Bisecting: 46914 revisions left to test after this (roughly 16 steps) [0af86604e34188e1a7263dac739f2b8faa6e892c] drm: atmel-hlcdc: add DPI mode support for XLCDC determine whether the revision contains the guilty commit revision cbf3a2cb156a2c911d8f38d8247814b4c07f49a2 crashed and is reachable testing commit 0af86604e34188e1a7263dac739f2b8faa6e892c gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8666de22f062da33f57324bf6eea87eb7180da265e10c3fa02d9a01120550e8b all runs: crashed: kernel BUG in __page_table_check_zero representative crash: kernel BUG in __page_table_check_zero, types: [BUG] # git bisect good 0af86604e34188e1a7263dac739f2b8faa6e892c Bisecting: 15125 revisions left to test after this (roughly 14 steps) [d3426a6ed9d8398bfee2a1c5cd0ae50f2f4494a8] Merge tag 'xfs-6.11-fixes-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux determine whether the revision contains the guilty commit revision cbf3a2cb156a2c911d8f38d8247814b4c07f49a2 crashed and is reachable testing commit d3426a6ed9d8398bfee2a1c5cd0ae50f2f4494a8 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b50556d4e952d5a1d4b39570e076a8062e93ea1636b96e5a7f0c8aac3661838b all runs: crashed: kernel BUG in __page_table_check_zero representative crash: kernel BUG in __page_table_check_zero, types: [BUG] # git bisect good d3426a6ed9d8398bfee2a1c5cd0ae50f2f4494a8 Bisecting: 7571 revisions left to test after this (roughly 13 steps) [d5e65d1fb75ffbe3aba33de81a72752ace28295e] Merge tag 'tpmdd-next-6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd determine whether the revision contains the guilty commit revision 0af86604e34188e1a7263dac739f2b8faa6e892c crashed and is reachable testing commit d5e65d1fb75ffbe3aba33de81a72752ace28295e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ce5a5b8775f6d89cd1021df185da5d602abedf4f0157c255267153510f2167ba all runs: OK false negative chance: 0.000 # git bisect bad d5e65d1fb75ffbe3aba33de81a72752ace28295e Bisecting: 3784 revisions left to test after this (roughly 12 steps) [11b3125073d16929403d3aa7b2ae6a482060a937] Merge tag 'acpi-6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm determine whether the revision contains the guilty commit revision 810e6d2fac01ab1e189f3002a364f19bd5d0f444 crashed and is reachable testing commit 11b3125073d16929403d3aa7b2ae6a482060a937 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a26efc81e180691f7d9a54c96469a1f2c5b4b9283e33af9d5f4edfa5d5dfb21b all runs: OK false negative chance: 0.000 # git bisect bad 11b3125073d16929403d3aa7b2ae6a482060a937 Bisecting: 1883 revisions left to test after this (roughly 11 steps) [30e48a75df9c6ead93866bdf1511ca6ecfe17fbe] net: microchip: add FDMA library determine whether the revision contains the guilty commit revision f9c035492f2010e1e7aede1f1bd32181d7cef2dc crashed and is reachable testing commit 30e48a75df9c6ead93866bdf1511ca6ecfe17fbe gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: af1c5fb504164024ea697233874fc688626987f7e02673d710ce4ffe7fa8dc16 all runs: crashed: kernel BUG in __page_table_check_zero representative crash: kernel BUG in __page_table_check_zero, types: [BUG] # git bisect good 30e48a75df9c6ead93866bdf1511ca6ecfe17fbe Bisecting: 941 revisions left to test after this (roughly 10 steps) [24b8c19314fa92baf03f2cea19d017789889a5b3] Merge branch '200GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue determine whether the revision contains the guilty commit revision f9c035492f2010e1e7aede1f1bd32181d7cef2dc crashed and is reachable testing commit 24b8c19314fa92baf03f2cea19d017789889a5b3 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c2f749e4a4f6cdf86aeef84e2f09681453b2246cf776390ba958de0fb8cfb18d all runs: crashed: kernel BUG in __page_table_check_zero representative crash: kernel BUG in __page_table_check_zero, types: [BUG] # git bisect good 24b8c19314fa92baf03f2cea19d017789889a5b3 Bisecting: 492 revisions left to test after this (roughly 9 steps) [3561373114c8b3359114e2da27259317dc51145a] Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net determine whether the revision contains the guilty commit revision 30e48a75df9c6ead93866bdf1511ca6ecfe17fbe crashed and is reachable testing commit 3561373114c8b3359114e2da27259317dc51145a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4176a3746cce84c9c28113622a01bcaf855c64b03919422ca392e9747e5b5270 all runs: OK false negative chance: 0.000 # git bisect bad 3561373114c8b3359114e2da27259317dc51145a Bisecting: 223 revisions left to test after this (roughly 8 steps) [77f587896757708780a7e8792efe62939f25a5ab] Merge tag 'arm-fixes-6.11-3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc determine whether the revision contains the guilty commit revision f9c035492f2010e1e7aede1f1bd32181d7cef2dc crashed and is reachable testing commit 77f587896757708780a7e8792efe62939f25a5ab gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d02cce7e6add0e3b966f6bb719ed5ce8bcab6fb44f1502c7aa60b534f37f0dba all runs: crashed: kernel BUG in __page_table_check_zero representative crash: kernel BUG in __page_table_check_zero, types: [BUG] # git bisect good 77f587896757708780a7e8792efe62939f25a5ab Bisecting: 111 revisions left to test after this (roughly 7 steps) [1217e6989c99c1c4b76866ea395dda757c79deb4] net/mlx5: fs, add support for no append at software level determine whether the revision contains the guilty commit revision 0af86604e34188e1a7263dac739f2b8faa6e892c crashed and is reachable testing commit 1217e6989c99c1c4b76866ea395dda757c79deb4 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 04237ab92874dc3cee230435498601bc62aa6e489b5d7dda2b677b639bf915af all runs: OK false negative chance: 0.000 # git bisect bad 1217e6989c99c1c4b76866ea395dda757c79deb4 Bisecting: 64 revisions left to test after this (roughly 6 steps) [5abfdfd402699ce7c1e81d1a25bc37f60f7741ff] Merge tag 'net-6.11-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net determine whether the revision contains the guilty commit revision d3426a6ed9d8398bfee2a1c5cd0ae50f2f4494a8 crashed and is reachable testing commit 5abfdfd402699ce7c1e81d1a25bc37f60f7741ff gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a3e7658f11615ae857356a969ed756838f01b60df4e094226602f42779acc280 all runs: OK false negative chance: 0.000 # git bisect bad 5abfdfd402699ce7c1e81d1a25bc37f60f7741ff Bisecting: 20 revisions left to test after this (roughly 5 steps) [d1aaaa2e0a6742b2bc4d851eb1a2b6390dbde2d9] Merge branch '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue determine whether the revision contains the guilty commit revision f9c035492f2010e1e7aede1f1bd32181d7cef2dc crashed and is reachable testing commit d1aaaa2e0a6742b2bc4d851eb1a2b6390dbde2d9 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 40851057d89d25e991e13d77ba0704ab7fcfb39bfb0d4ea640a5913d8925962c all runs: crashed: kernel BUG in __page_table_check_zero representative crash: kernel BUG in __page_table_check_zero, types: [BUG] # git bisect good d1aaaa2e0a6742b2bc4d851eb1a2b6390dbde2d9 Bisecting: 10 revisions left to test after this (roughly 3 steps) [09a45a5553792bbf20beba0a1ac90b4692324d06] netlink: specs: mptcp: fix port endianness determine whether the revision contains the guilty commit revision cbf3a2cb156a2c911d8f38d8247814b4c07f49a2 crashed and is reachable testing commit 09a45a5553792bbf20beba0a1ac90b4692324d06 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: bd061bc0cbb87c5835f0d22d69e2c7353e1c6df0d0762c08fda2fc767bbffebd all runs: crashed: kernel BUG in __page_table_check_zero representative crash: kernel BUG in __page_table_check_zero, types: [BUG] # git bisect good 09a45a5553792bbf20beba0a1ac90b4692324d06 Bisecting: 5 revisions left to test after this (roughly 3 steps) [3e705251d998c9688be0e7e0526c250fec24d233] net: netfilter: move nf flowtable bpf initialization in nf_flow_table_module_init() determine whether the revision contains the guilty commit revision d1aaaa2e0a6742b2bc4d851eb1a2b6390dbde2d9 crashed and is reachable testing commit 3e705251d998c9688be0e7e0526c250fec24d233 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b549f4cda8c2ee977dc2cf6ef4fd4b846030db7ad2a3500474fb800b97afe4a8 all runs: crashed: kernel BUG in __page_table_check_zero representative crash: kernel BUG in __page_table_check_zero, types: [BUG] # git bisect good 3e705251d998c9688be0e7e0526c250fec24d233 Bisecting: 2 revisions left to test after this (roughly 2 steps) [d6de45e3c6f3713d3825d3e2860c11d24e0f941f] platform/x86: asus-wmi: Disable OOBE experience on Zenbook S 16 determine whether the revision contains the guilty commit revision f9c035492f2010e1e7aede1f1bd32181d7cef2dc crashed and is reachable testing commit d6de45e3c6f3713d3825d3e2860c11d24e0f941f gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 53b5b8ee673e5711dd7f13472f781581d9e4588d6f28d6a26506a76aeafaf302 all runs: crashed: kernel BUG in __page_table_check_zero representative crash: kernel BUG in __page_table_check_zero, types: [BUG] # git bisect good d6de45e3c6f3713d3825d3e2860c11d24e0f941f Bisecting: 0 revisions left to test after this (roughly 1 step) [42c5b519498820e95d96311b1200eb4b854fc2bd] Merge tag 'platform-drivers-x86-v6.11-7' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86 determine whether the revision contains the guilty commit revision d6de45e3c6f3713d3825d3e2860c11d24e0f941f crashed and is reachable testing commit 42c5b519498820e95d96311b1200eb4b854fc2bd gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 39d59925c40b2ec46a5a31b62afc4236492f9360d90f4ca8e1ce1d02f0bfdbfb all runs: OK false negative chance: 0.000 # git bisect bad 42c5b519498820e95d96311b1200eb4b854fc2bd Bisecting: 0 revisions left to test after this (roughly 0 steps) [79a61cc3fc0466ad2b7b89618a6157785f0293b3] mm: avoid leaving partial pfn mappings around in error case determine whether the revision contains the guilty commit revision 810e6d2fac01ab1e189f3002a364f19bd5d0f444 crashed and is reachable testing commit 79a61cc3fc0466ad2b7b89618a6157785f0293b3 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5e76c62888b8b86fd5a8a22769118890d109456b3b43fc4275a70c8f73801792 all runs: OK false negative chance: 0.000 # git bisect bad 79a61cc3fc0466ad2b7b89618a6157785f0293b3 79a61cc3fc0466ad2b7b89618a6157785f0293b3 is the first bad commit commit 79a61cc3fc0466ad2b7b89618a6157785f0293b3 Author: Linus Torvalds Date: Wed Sep 11 17:11:23 2024 -0700 mm: avoid leaving partial pfn mappings around in error case As Jann points out, PFN mappings are special, because unlike normal memory mappings, there is no lifetime information associated with the mapping - it is just a raw mapping of PFNs with no reference counting of a 'struct page'. That's all very much intentional, but it does mean that it's easy to mess up the cleanup in case of errors. Yes, a failed mmap() will always eventually clean up any partial mappings, but without any explicit lifetime in the page table mapping itself, it's very easy to do the error handling in the wrong order. In particular, it's easy to mistakenly free the physical backing store before the page tables are actually cleaned up and (temporarily) have stale dangling PTE entries. To make this situation less error-prone, just make sure that any partial pfn mapping is torn down early, before any other error handling. Reported-and-tested-by: Jann Horn Cc: Andrew Morton Cc: Jason Gunthorpe Cc: Simona Vetter Signed-off-by: Linus Torvalds mm/memory.c | 27 ++++++++++++++++++++++----- 1 file changed, 22 insertions(+), 5 deletions(-) accumulated error probability: 0.00 culprit signature: 5e76c62888b8b86fd5a8a22769118890d109456b3b43fc4275a70c8f73801792 parent signature: d02cce7e6add0e3b966f6bb719ed5ce8bcab6fb44f1502c7aa60b534f37f0dba revisions tested: 26, total time: 6h6m44.505740194s (build: 2h42m24.219704368s, test: 3h6m42.362479256s) first good commit: 79a61cc3fc0466ad2b7b89618a6157785f0293b3 mm: avoid leaving partial pfn mappings around in error case recipients (to): ["akpm@linux-foundation.org" "jannh@google.com" "linux-mm@kvack.org" "torvalds@linux-foundation.org"] recipients (cc): ["linux-kernel@vger.kernel.org"]