ci2 starts bisection 2026-09-21 08:39:33.042017663 +0000 UTC m=+265224.418692576 bisecting fixing commit since e4f7d8be268ecf717f94ee2e242afa79ddeacaed building syzkaller on 5d63f80b763910b40ae04a96c13dc75d621bea67 ensuring issue is reproducible on original commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed testing commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 76a019537188e0dc9c0a353e1a907c95208556f8597cfb97c82993ffb1c91194 all runs: crashed: general protection fault in i915_pci_probe representative crash: general protection fault in i915_pci_probe, types: [DoS] check whether we can drop unnecessary instrumentation disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: a722580eb40713ecb99a2390ac75136efc1a307f2a14a984dc1cf5e3301a9157 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in i915_pci_probe representative crash: BUG: unable to handle kernel NULL pointer dereference in i915_pci_probe, types: [NULL-POINTER-DEREFERENCE] the bug reproduces without the instrumentation disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed kconfig minimization: base=3829 full=7621 leaves diff=2129 split chunks (needed=false): <2129> split chunk #0 of len 2129 into 5 parts testing without sub-chunk 1/5 disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 4c402a8eca5a489806d7ce7f5693f9c3cfa9071a31c68d9d805da1edf362b7c6 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in i915_pci_probe representative crash: BUG: unable to handle kernel NULL pointer dereference in i915_pci_probe, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 6686e94492842258a8d2b07044c2b30b169c3bbe1127fdcf4cd344776e1dd10c all runs: OK false negative chance: 0.000 testing without sub-chunk 3/5 disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep hang], they are not needed testing commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: a9b8d7a861ae9cfdb8348220f9cdd4293c8ae4d553f2e8426d8a0baed7fc5247 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in i915_pci_probe representative crash: BUG: unable to handle kernel NULL pointer dereference in i915_pci_probe, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep hang], they are not needed testing commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 76675640fbf131b46fc71a9b46107e52e5065d66b686be5847b14b812de69780 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in i915_pci_probe representative crash: BUG: unable to handle kernel NULL pointer dereference in i915_pci_probe, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: f4f974ee50a1cfc0a93342903e4124f990acf8b8a9b34b11fad1d703eaf668c9 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in i915_pci_probe representative crash: BUG: unable to handle kernel NULL pointer dereference in i915_pci_probe, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped minimized to 426 configs; suspects: [6LOWPAN ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI BLK_DEV_ZONED CHARGER_BQ24190 CMA COMMON_CLK DAX DEVICE_PRIVATE DEV_COREDUMP DEV_DAX DIMLIB DLM DLN2_ADC DMABUF_HEAPS DMABUF_HEAPS_CMA DMABUF_HEAPS_SYSTEM DMABUF_MOVE_NOTIFY DMA_CMA DMA_ENGINE_RAID DM_AUDIT DM_BIO_PRISON DM_BUFIO DM_CACHE DM_CACHE_SMQ DM_CLONE DM_CRYPT DM_FLAKEY DM_INTEGRITY DM_MULTIPATH DM_MULTIPATH_QL DM_MULTIPATH_ST DM_PERSISTENT_DATA DM_RAID DM_SNAPSHOT DM_THIN_PROVISIONING DM_UEVENT DM_VERITY DM_VERITY_FEC DM_WRITECACHE DM_ZONED DRAGONRISE_FF DRM DRM_BOCHS DRM_BRIDGE DRM_BUDDY DRM_CIRRUS_QEMU DRM_DEBUG_MM DRM_DISPLAY_DP_HELPER DRM_DISPLAY_HDCP_HELPER DRM_DISPLAY_HDMI_HELPER DRM_DISPLAY_HELPER DRM_DP_AUX_BUS DRM_DP_AUX_CHARDEV DRM_FBDEV_EMULATION DRM_GEM_SHMEM_HELPER DRM_GM12U320 DRM_GUD DRM_I915 DRM_I915_CAPTURE_ERROR DRM_I915_COMPRESS_ERROR DRM_I915_USERPTR DRM_KMS_HELPER DRM_MIPI_DSI DRM_NOMODESET DRM_PANEL DRM_PANEL_BRIDGE DRM_PANEL_EDP DRM_PANEL_ORIENTATION_QUIRKS DRM_SIMPLEDRM DRM_TTM DRM_TTM_HELPER DRM_UDL DRM_VGEM DRM_VIRTIO_GPU DRM_VKMS DRM_VMWGFX DRM_VRAM_HELPER DUMMY DVB_AF9013 DVB_AF9033 DVB_AS102 DVB_AS102_FE DVB_B2C2_FLEXCOP DVB_B2C2_FLEXCOP_USB DVB_CORE DVB_DIB3000MB DVB_DIB3000MC DVB_EC100 DVB_GP8PSK_FE DVB_RTL2830 DVB_RTL2832 DVB_RTL2832_SDR DVB_TEST_DRIVERS DVB_TTUSB_BUDGET DVB_TTUSB_DEC DVB_USB DVB_USB_A800 DVB_USB_AF9005 DVB_USB_AF9005_REMOTE DVB_USB_AF9015 DVB_USB_AF9035 DVB_USB_ANYSEE DVB_USB_AU6610 DVB_USB_AZ6007 DVB_USB_AZ6027 DVB_USB_CE6230 DVB_USB_CINERGY_T2 DVB_USB_CXUSB DVB_USB_CXUSB_ANALOG DVB_USB_DIB0700 DVB_USB_DIB3000MC DVB_USB_DIBUSB_MB DVB_USB_DIBUSB_MC DVB_USB_DIGITV DVB_USB_DTT200U DVB_USB_DTV5100 DVB_USB_DVBSKY DVB_USB_DW2102 DVB_USB_EC168 DVB_USB_GL861 DVB_USB_GP8PSK DVB_USB_LME2510 DVB_USB_M920X DVB_USB_MXL111SF DVB_USB_NOVA_T_USB2 DVB_USB_OPERA1 DVB_USB_PCTV452E DVB_USB_RTL28XXU DVB_USB_TECHNISAT_USB2 DVB_USB_TTUSB2 DVB_USB_UMT_010 DVB_USB_V2 DVB_USB_VP702X DVB_USB_VP7045 DVB_USB_ZD1301 DVB_VIDTV DVB_ZL10353 ECRYPT_FS ECRYPT_FS_MESSAGING EDAC EEPROM_93CX6 EFS_FS ENCRYPTED_KEYS EQUALIZER EROFS_FS EROFS_FS_POSIX_ACL EROFS_FS_SECURITY EROFS_FS_XATTR EROFS_FS_ZIP EVM EVM_ADD_XATTRS EVM_ATTR_FSUUID EXFAT_FS EXPORTFS_BLOCK_OPS EXT3_FS EXT3_FS_POSIX_ACL EXT3_FS_SECURITY EXTCON EXTCON_INTEL_CHT_WC EXTCON_PTN5150 EXTCON_USBC_TUSB320 F2FS_CHECK_FS F2FS_FAULT_INJECTION F2FS_FS F2FS_FS_COMPRESSION F2FS_FS_LZ4 F2FS_FS_LZ4HC F2FS_FS_LZO F2FS_FS_LZORLE F2FS_FS_POSIX_ACL F2FS_FS_SECURITY F2FS_FS_XATTR F2FS_FS_ZSTD F2FS_STAT_FS FANOTIFY FANOTIFY_ACCESS_PERMISSIONS FB FB_CFB_COPYAREA FB_CFB_FILLRECT FB_CFB_IMAGEBLIT FB_CMDLINE FB_DEFERRED_IO FB_NOTIFY FB_SYS_COPYAREA FB_SYS_FILLRECT FB_SYS_FOPS FB_SYS_IMAGEBLIT FB_TILEBLITTING FB_VESA FB_VGA16 FB_VIRTUAL FDDI FIREWIRE FIREWIRE_NET FIREWIRE_OHCI FIREWIRE_SBP2 FONT_8x16 FONT_8x8 FONT_SUPPORT FRAMEBUFFER_CONSOLE FRAMEBUFFER_CONSOLE_DETECT_PRIMARY FRAMEBUFFER_CONSOLE_ROTATION FRONTSWAP FS_DAX FS_DAX_PMD FS_ENCRYPTION FS_ENCRYPTION_ALGS FS_VERITY FS_VERITY_BUILTIN_SIGNATURES FTL FUSE_DAX FUSE_FS FW_LOADER_COMPRESS FW_LOADER_PAGED_BUF FW_LOADER_SYSFS FW_LOADER_USER_HELPER FW_LOADER_USER_HELPER_FALLBACK GACT_PROB GARP GENERIC_PHY GET_FREE_REGION GFS2_FS GFS2_FS_LOCKING_DLM GNSS GNSS_USB GOOGLE_COREBOOT_TABLE GOOGLE_FIRMWARE GOOGLE_MEMCONSOLE GOOGLE_MEMCONSOLE_COREBOOT GOOGLE_VPD GPIOLIB GPIOLIB_IRQCHIP GPIO_ACPI GPIO_DLN2 GPIO_VIPERBOARD GREENASIA_FF GREYBUS GREYBUS_BRIDGED_PHY GREYBUS_ES2 GREYBUS_HID GREYBUS_USB GTP GUEST_PERF_EVENTS HAVE_ARCH_NODE_DEV_GROUP HAVE_ARCH_USERFAULTFD_MINOR HAVE_ARCH_USERFAULTFD_WP HAVE_BOOTMEM_INFO_NODE HAVE_CLK_PREPARE HAVE_KVM_CPU_RELAX_INTERCEPT HAVE_KVM_DIRTY_RING HAVE_KVM_DIRTY_RING_ACQ_REL HAVE_KVM_DIRTY_RING_TSO HAVE_KVM_EVENTFD HAVE_KVM_IRQCHIP HAVE_KVM_IRQFD HAVE_KVM_IRQ_BYPASS HAVE_KVM_IRQ_ROUTING HAVE_KVM_MSI HAVE_KVM_NO_POLL HAVE_KVM_PFNCACHE HAVE_KVM_PM_NOTIFIER HAVE_SCHED_AVG_IRQ HDLC HDLC_CISCO HDLC_FR HDLC_PPP HDLC_RAW HDLC_RAW_ETH HDLC_X25 HDMI HFSPLUS_FS HFS_FS HID_ACCUTOUCH HID_ACRUX HID_ACRUX_FF HID_ALPS HID_APPLEIR HID_ASUS HID_AUREAL HID_BATTERY_STRENGTH HID_BETOP_FF HID_BIGBEN_FF HID_CMEDIA HID_CORSAIR HID_COUGAR HID_CP2112 HID_CREATIVE_SB0540 HID_DRAGONRISE HID_ELAN HID_ELECOM HID_ELO HID_EMS_FF HID_FT260 HID_GEMBIRD HID_GFRM HID_GLORIOUS HID_GREENASIA HID_GT683R HID_HOLTEK HID_ICADE HID_JABRA HID_KEYTOUCH HID_KYE HID_LCPOWER HID_LED HID_LENOVO HID_LETSKETCH HID_LOGITECH_DJ HID_LOGITECH_HIDPP HID_MACALLY HID_MAGICMOUSE HID_MALTRON HID_MAYFLASH HID_MCP2221 HID_MEGAWORLD_FF HID_MULTITOUCH HID_NTI HID_ORTEK HID_PENMOUNT HID_PICOLCD HID_PICOLCD_BACKLIGHT HID_PICOLCD_CIR HID_PICOLCD_FB HID_PICOLCD_LCD HID_PICOLCD_LEDS HID_PLANTRONICS HID_PRIMAX HID_PRODIKEYS HID_PXRC HID_RAZER HID_RETRODE HID_RMI HID_ROCCAT HID_SAITEK HID_SEMITEK HID_SENSOR_ACCEL_3D HID_SENSOR_ALS HID_SENSOR_CUSTOM_INTEL_HINGE HID_SENSOR_CUSTOM_SENSOR HID_SENSOR_DEVICE_ROTATION HID_SENSOR_GYRO_3D HID_SENSOR_HUB HID_SENSOR_HUMIDITY HID_SENSOR_IIO_COMMON HID_SENSOR_IIO_TRIGGER HID_SENSOR_INCLINOMETER_3D HID_SENSOR_MAGNETOMETER_3D HID_SENSOR_PRESS HID_SENSOR_PROX HID_SENSOR_TEMP HID_SIGMAMICRO HID_SPEEDLINK HID_STEAM HID_STEELSERIES HID_THINGM HID_TIVO HID_TOPRE HID_TWINHAN HID_U2FZERO HID_UCLOGIC HID_UDRAW_PS3 HID_VIEWSONIC HID_VIVALDI HID_VIVALDI_COMMON HID_VRC2 HID_WACOM HID_WALTOP HID_WIIMOTE HID_XIAOMI HID_XINMO HID_ZYDACRON HMM_MIRROR HOLTEK_FF HOTPLUG_PCI_PCIE HPET_MMAP HPET_MMAP_DEFAULT HPFS_FS I2C_ALGOBIT I2C_CHARDEV I2C_CP2615 I2C_DESIGNWARE_CORE I2C_DESIGNWARE_PLATFORM I2C_DIOLAN_U2C I2C_DLN2 I2C_MUX I2C_MUX_REG I2C_ROBOTFUZZ_OSIF I2C_SI4713 I2C_SLAVE I2C_SLAVE_EEPROM I2C_TINY_USB I2C_VIPERBOARD IEEE802154 IEEE802154_6LOWPAN IEEE802154_ATUSB IEEE802154_DRIVERS IEEE802154_HWSIM IEEE802154_NL802154_EXPERIMENTAL IEEE802154_SOCKET IFB IIO IIO_BUFFER IIO_KFIFO_BUF IIO_TRIGGER IIO_TRIGGERED_BUFFER IKCONFIG IKCONFIG_PROC IMA IMA_APPRAISE IMA_APPRAISE_MODSIG IMA_DEFAULT_HASH_SHA256 IMA_LSM_RULES IMA_MEASURE_ASYMMETRIC_KEYS IMA_NG_TEMPLATE IMA_QUEUE_EARLY_BOOT_KEYS IMA_READ_POLICY IMA_WRITE_POLICY INET6_ESPINTCP INET6_ESP_OFFLOAD INET6_IPCOMP INET6_TUNNEL INET6_XFRM_TUNNEL INET_AH INET_DCCP_DIAG INET_DIAG INET_DIAG_DESTROY INET_ESP INET_ESPINTCP INET_ESP_OFFLOAD INET_IPCOMP INET_MPTCP_DIAG INET_RAW_DIAG INET_SCTP_DIAG INET_TCP_DIAG INET_UDP_DIAG INET_XFRM_TUNNEL INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_ADDR_TRANS_CONFIGFS INFINIBAND_IPOIB INFINIBAND_IPOIB_CM INFINIBAND_IPOIB_DEBUG INFINIBAND_ISER INFINIBAND_ON_DEMAND_PAGING INFINIBAND_RTRS INFINIBAND_SRP INFINIBAND_USER_ACCESS INFINIBAND_USER_MAD INFINIBAND_USER_MEM INPUT_ATI_REMOTE2 INPUT_CM109 INPUT_IMS_PCU INPUT_JOYDEV INPUT_KEYSPAN_REMOTE INPUT_LEDS INPUT_MOUSEDEV INPUT_MOUSEDEV_PSAUX INPUT_POWERMATE INPUT_UINPUT INPUT_YEALINK INTEGRITY INTEGRITY_ASYMMETRIC_KEYS INTEGRITY_AUDIT INTEGRITY_SIGNATURE INTEGRITY_TRUSTED_KEYRING INTEL_CHTWC_INT33FE INTEL_IDMA64 INTEL_IOATDMA INTEL_IOMMU_DEFAULT_ON INTEL_IOMMU_SVM INTEL_SOC_PMIC_CHTWC INTERVAL_TREE IOMMU_SVA IP6_NF_MATCH_AH IP6_NF_MATCH_EUI64 IP6_NF_MATCH_FRAG IP6_NF_MATCH_HL IP6_NF_MATCH_MH IP6_NF_MATCH_OPTS IP6_NF_MATCH_RPFILTER IP6_NF_MATCH_RT IP6_NF_MATCH_SRH IP6_NF_NAT IP6_NF_RAW IP6_NF_SECURITY IP6_NF_TARGET_HL IP6_NF_TARGET_MASQUERADE IP6_NF_TARGET_NPT IP6_NF_TARGET_SYNPROXY IPV6_FOU IPV6_FOU_TUNNEL IPV6_GRE IPV6_ILA IPV6_MIP6 IPV6_MROUTE IPV6_MROUTE_MULTIPLE_TABLES IPV6_MULTIPLE_TABLES IPV6_OPTIMISTIC_DAD IPV6_PIMSM_V2 IPV6_ROUTER_PREF IPV6_ROUTE_INFO IPV6_RPL_LWTUNNEL IPV6_SEG6_BPF IPV6_SEG6_HMAC IPV6_SEG6_LWTUNNEL IPV6_SIT_6RD IPV6_SUBTREES IPV6_TUNNEL IPV6_VTI IPVLAN IPVLAN_L3S IPVTAP IP_DCCP IP_DCCP_CCID3 IP_DCCP_TFRC_LIB IP_FIB_TRIE_STATS IP_MROUTE_MULTIPLE_TABLES IP_NF_ARPFILTER IP_NF_ARPTABLES IP_NF_ARP_MANGLE IP_NF_MATCH_AH IP_NF_MATCH_ECN IP_NF_MATCH_RPFILTER IP_NF_MATCH_TTL IP_NF_RAW IP_SCTP IRQ_TIME_ACCOUNTING LAPB LCD_CLASS_DEVICE MAC802154 MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_VIPERBOARD MPTCP MTD NETFILTER_ADVANCED NET_ACT_GACT NET_ACT_MIRRED NET_IPGRE_DEMUX NFT_FWD_NETDEV NF_TABLES NF_TABLES_NETDEV RADIO_ADAPTERS RADIO_SI4713 RAS RC_CORE REGULATOR RFKILL SND SOUND STAGING TRANSPARENT_HUGEPAGE TRUSTED_KEYS TYPEC TYPEC_MUX_PI3USB30532 USB_ROLES_INTEL_XHCI USB_ROLE_SWITCH VIDEO_DEV VIRTIO_FS WAN ZONE_DEVICE] disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing current HEAD 1a8763b93150b2c8f3992c27a5ce7857fee4ab0f testing commit 1a8763b93150b2c8f3992c27a5ce7857fee4ab0f gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 94d2ec3654f551da96f24428f3235c8d34f0c1d622d8a06fdefae0c5b1e8a424 all runs: OK false negative chance: 0.000 # git bisect start 1a8763b93150b2c8f3992c27a5ce7857fee4ab0f e4f7d8be268ecf717f94ee2e242afa79ddeacaed Bisecting: 1136 revisions left to test after this (roughly 10 steps) [ec896c5fbdd320e12c81dd9bec69725abc3616c4] nfsd: add filehandle match check to nfsd4_delegreturn() determine whether the revision contains the guilty commit revision e4f7d8be268ecf717f94ee2e242afa79ddeacaed crashed and is reachable testing commit ec896c5fbdd320e12c81dd9bec69725abc3616c4 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: cd5533208ea7c57020854e5555ccdd061dd54d9e99f6d8c72ddd4450086d8ed4 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in i915_pci_probe representative crash: BUG: unable to handle kernel NULL pointer dereference in i915_pci_probe, types: [NULL-POINTER-DEREFERENCE] # git bisect good ec896c5fbdd320e12c81dd9bec69725abc3616c4 Bisecting: 568 revisions left to test after this (roughly 9 steps) [1dffdae28657053cb86bffc1652b1073b0f00176] PCI: xgene: Drop XGENE_PCIE_IP_VER_UNKN determine whether the revision contains the guilty commit revision ec896c5fbdd320e12c81dd9bec69725abc3616c4 crashed and is reachable testing commit 1dffdae28657053cb86bffc1652b1073b0f00176 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 66e777a8b5adc208a713eaa330fa340fdcab2b842df831d33b8ca563f163e936 all runs: OK false negative chance: 0.000 # git bisect bad 1dffdae28657053cb86bffc1652b1073b0f00176 Bisecting: 283 revisions left to test after this (roughly 8 steps) [eac2f377cc2b7ff91a802c56543c1f2984aa7a99] clk: qcom: gcc-mdm9607: Fix enable_reg for gcc_blsp1_sleep_clk determine whether the revision contains the guilty commit revision e4f7d8be268ecf717f94ee2e242afa79ddeacaed crashed and is reachable testing commit eac2f377cc2b7ff91a802c56543c1f2984aa7a99 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: e8b116cb6629af44c6083d245d85e2897fc3361083094dd44990ab19967f5188 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in i915_pci_probe representative crash: BUG: unable to handle kernel NULL pointer dereference in i915_pci_probe, types: [NULL-POINTER-DEREFERENCE] # git bisect good eac2f377cc2b7ff91a802c56543c1f2984aa7a99 Bisecting: 141 revisions left to test after this (roughly 7 steps) [7f4b3625cae9605020383146ef61939ca015eaf7] HID: nintendo: Fix imu_timestamp_us double increment per report determine whether the revision contains the guilty commit revision e4f7d8be268ecf717f94ee2e242afa79ddeacaed crashed and is reachable testing commit 7f4b3625cae9605020383146ef61939ca015eaf7 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 3b864a87d335f6020f0fc3c5069437a9f360e4fd31ad6b53973acdb332501d4b all runs: OK false negative chance: 0.000 # git bisect bad 7f4b3625cae9605020383146ef61939ca015eaf7 Bisecting: 70 revisions left to test after this (roughly 6 steps) [f5b660e0b0d9190d8853c795c2522cc5f8c93003] scsi: qla2xxx: Avoid double completion in async IOCB timeout determine whether the revision contains the guilty commit revision e4f7d8be268ecf717f94ee2e242afa79ddeacaed crashed and is reachable testing commit f5b660e0b0d9190d8853c795c2522cc5f8c93003 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: d81ed552febc2d3e86ee61c68662db752ac25ae9957aa45e10411070987bd26f all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in i915_pci_probe representative crash: BUG: unable to handle kernel NULL pointer dereference in i915_pci_probe, types: [NULL-POINTER-DEREFERENCE] # git bisect good f5b660e0b0d9190d8853c795c2522cc5f8c93003 Bisecting: 35 revisions left to test after this (roughly 5 steps) [9ccd8dd34f6fbd1e787c7c6e9233616a45b839c3] mm/damon/sysfs-schemes: kobject_del() scheme dirs determine whether the revision contains the guilty commit revision ec896c5fbdd320e12c81dd9bec69725abc3616c4 crashed and is reachable testing commit 9ccd8dd34f6fbd1e787c7c6e9233616a45b839c3 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 710b75b3dc180a342fccd6fe10991d5a27f5a91696c236fc7095749527a7a28c all runs: OK false negative chance: 0.000 # git bisect bad 9ccd8dd34f6fbd1e787c7c6e9233616a45b839c3 Bisecting: 17 revisions left to test after this (roughly 4 steps) [c127ace7af2b40107947a6504391f94d6fd21734] drm/amd/display: avoid divide-by-zero in __is_lut_linear() determine whether the revision contains the guilty commit revision e4f7d8be268ecf717f94ee2e242afa79ddeacaed crashed and is reachable testing commit c127ace7af2b40107947a6504391f94d6fd21734 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 4661850d18f155816096ee3d9fea9e3d9738e65a219f927eda804ad4e1071103 all runs: OK false negative chance: 0.000 # git bisect bad c127ace7af2b40107947a6504391f94d6fd21734 Bisecting: 8 revisions left to test after this (roughly 3 steps) [3699327156dc7c89b7a44f1b012e6af6e75e8df1] f2fs: return writeback error from collapse range determine whether the revision contains the guilty commit revision ec896c5fbdd320e12c81dd9bec69725abc3616c4 crashed and is reachable testing commit 3699327156dc7c89b7a44f1b012e6af6e75e8df1 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: db5aa9b393b087e226cdc879385124e9cebde1e34c2efaeb84a68e3acc6a2a3b all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in i915_pci_probe representative crash: BUG: unable to handle kernel NULL pointer dereference in i915_pci_probe, types: [NULL-POINTER-DEREFERENCE] # git bisect good 3699327156dc7c89b7a44f1b012e6af6e75e8df1 Bisecting: 4 revisions left to test after this (roughly 2 steps) [6729990df9e70623bf53f855b521ae71ca9cb278] drm: fix race between partial drm_dev_register() failure and ioctl determine whether the revision contains the guilty commit revision ec896c5fbdd320e12c81dd9bec69725abc3616c4 crashed and is reachable testing commit 6729990df9e70623bf53f855b521ae71ca9cb278 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 964deb050c45f56b19b3d7f3ffec829d38e9e5bf72d836219ad96ccd6bb8770f all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in i915_pci_probe representative crash: BUG: unable to handle kernel NULL pointer dereference in i915_pci_probe, types: [NULL-POINTER-DEREFERENCE] # git bisect good 6729990df9e70623bf53f855b521ae71ca9cb278 Bisecting: 2 revisions left to test after this (roughly 1 step) [9210647e5cb005a2d5b199f8dbb6104860c88512] drm/sun4i: fix refcount leak in sun4i_backend_init_sat() determine whether the revision contains the guilty commit revision 3699327156dc7c89b7a44f1b012e6af6e75e8df1 crashed and is reachable testing commit 9210647e5cb005a2d5b199f8dbb6104860c88512 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 52b0af370453757040da2f1ccc3544f8baed6d7e2952de9950692a43becbee4b all runs: OK false negative chance: 0.000 # git bisect bad 9210647e5cb005a2d5b199f8dbb6104860c88512 Bisecting: 0 revisions left to test after this (roughly 0 steps) [2239e6b49d33bb38817d69b4f0bf7d5cbde2ec68] drm/i915: Guard against NULL driver_data in i915_pci_probe() determine whether the revision contains the guilty commit revision 3699327156dc7c89b7a44f1b012e6af6e75e8df1 crashed and is reachable testing commit 2239e6b49d33bb38817d69b4f0bf7d5cbde2ec68 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: e037b25d379f9485614542b65f5264e58a5d238b0cfa95880a36950b02ca23c0 all runs: OK false negative chance: 0.000 # git bisect bad 2239e6b49d33bb38817d69b4f0bf7d5cbde2ec68 2239e6b49d33bb38817d69b4f0bf7d5cbde2ec68 is the first bad commit commit 2239e6b49d33bb38817d69b4f0bf7d5cbde2ec68 Author: Deepanshu Kartikey Date: Thu Aug 13 12:19:02 2026 +0530 drm/i915: Guard against NULL driver_data in i915_pci_probe() commit 3785d40831ba5601296283e0197e10e089392757 upstream. pci_match_device() can return the dummy pci_device_id_any entry when a device is force-bound via sysfs driver_override, in which case ->driver_data is unset (NULL). i915_pci_probe() casts it to struct intel_device_info * unconditionally and dereferences intel_info->require_force_probe, causing a NULL-ptr-deref. Reported-by: syzbot+db96c5ff032f4292a8dc@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=db96c5ff032f4292a8dc Tested-by: syzbot+db96c5ff032f4292a8dc@syzkaller.appspotmail.com Cc: stable@vger.kernel.org Signed-off-by: Deepanshu Kartikey Link: https://patch.msgid.link/20260813064902.367504-1-kartikey406@gmail.com Signed-off-by: Jani Nikula (cherry picked from commit 2727922084672cc274ecea726ea00363c2893731) Signed-off-by: Jani Nikula Signed-off-by: Greg Kroah-Hartman drivers/gpu/drm/i915/i915_pci.c | 3 +++ 1 file changed, 3 insertions(+) accumulated error probability: 0.00 culprit signature: e037b25d379f9485614542b65f5264e58a5d238b0cfa95880a36950b02ca23c0 parent signature: 964deb050c45f56b19b3d7f3ffec829d38e9e5bf72d836219ad96ccd6bb8770f revisions tested: 19, total time: 5h56m55.543335987s (build: 2h13m22.954484988s, test: 3h15m11.237507696s) first good commit: 2239e6b49d33bb38817d69b4f0bf7d5cbde2ec68 drm/i915: Guard against NULL driver_data in i915_pci_probe() recipients (to): ["gregkh@linuxfoundation.org" "jani.nikula@intel.com" "kartikey406@gmail.com" "syzbot+db96c5ff032f4292a8dc@syzkaller.appspotmail.com"] recipients (cc): []