ci starts bisection 2024-11-28 16:52:34.362991194 +0000 UTC m=+80407.130789045 bisecting cause commit starting from f486c8aa16b8172f63bddc70116a0c897a7f3f02 building syzkaller on 5df2386563cbffa1bbbb9d0b8ec1eebb98d051ae ensuring issue is reproducible on original commit f486c8aa16b8172f63bddc70116a0c897a7f3f02 testing commit f486c8aa16b8172f63bddc70116a0c897a7f3f02 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3536c7c11bde55fb6c3fd509ba7a9c1024f47bc63af0a75ee647f668144ec217 all runs: crashed: general protection fault in exfat_init_ext_entry representative crash: general protection fault in exfat_init_ext_entry, types: [UNKNOWN] check whether we can drop unnecessary instrumentation disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit f486c8aa16b8172f63bddc70116a0c897a7f3f02 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 10f4b7dbc8d6caf3040e9ec3ac473e06ae7f07345d69e4ac217aa78a779e022a all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in exfat_init_ext_entry representative crash: BUG: unable to handle kernel NULL pointer dereference in exfat_init_ext_entry, types: [UNKNOWN] the bug reproduces without the instrumentation disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed kconfig minimization: base=4045 full=8242 leaves diff=2124 split chunks (needed=false): <2124> split chunk #0 of len 2124 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 f486c8aa16b8172f63bddc70116a0c897a7f3f02 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 20bec9c3797d36a03bb5b80f271948b0bb14d0617a58bee07a3a70bdc6cc33cc all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in exfat_init_ext_entry representative crash: BUG: unable to handle kernel NULL pointer dereference in exfat_init_ext_entry, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN LOCKDEP], they are not needed testing commit f486c8aa16b8172f63bddc70116a0c897a7f3f02 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 failed building f486c8aa16b8172f63bddc70116a0c897a7f3f02: drivers/gpu/drm/bridge/aux-bridge.c:116: undefined reference to `devm_drm_of_get_bridge' testing without sub-chunk 3/5 disabling configs for [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit f486c8aa16b8172f63bddc70116a0c897a7f3f02 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8d71abac7112f823f618952999646a9551f2122306b838bd8d37cf3ecd3a79e9 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in exfat_init_ext_entry representative crash: BUG: unable to handle kernel NULL pointer dereference in exfat_init_ext_entry, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit f486c8aa16b8172f63bddc70116a0c897a7f3f02 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8603af6687714a734ea43ac4c4b82915ff256805932d1e08d2dd61d5a4b32e40 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in exfat_init_ext_entry representative crash: BUG: unable to handle kernel NULL pointer dereference in exfat_init_ext_entry, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit f486c8aa16b8172f63bddc70116a0c897a7f3f02 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8bcc4867d114196b449076f182f811a965dc6d6417ebb6aac9e34f0d70d79c67 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in exfat_init_ext_entry representative crash: BUG: unable to handle kernel NULL pointer dereference in exfat_init_ext_entry, types: [UNKNOWN] the chunk can be dropped minimized to 425 configs; suspects: [6LOWPAN ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI CHARGER_BQ24190 CMA COMMON_CLK DAX DLM DRM DRM_BRIDGE DRM_I915 DRM_I915_USERPTR DRM_KMS_HELPER DRM_MIPI_DSI 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_VIRTIO_GPU_KMS DRM_VKMS DRM_VMWGFX 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_BACKED_BY_FILE 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_CORE FB_DEFERRED_IO FB_DEVICE FB_IOMEM_FOPS FB_IOMEM_HELPERS FB_NOTIFY FB_SYSMEM_FOPS FB_SYSMEM_HELPERS FB_SYSMEM_HELPERS_DEFERRED FB_SYS_COPYAREA FB_SYS_FILLRECT 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 FS_DAX FS_DAX_PMD FS_ENCRYPTION FS_ENCRYPTION_ALGS FS_STACK 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_LJCA GPIO_VIPERBOARD GREENASIA_FF GREYBUS GREYBUS_BRIDGED_PHY GREYBUS_ES2 GREYBUS_HID GREYBUS_USB GROUP_SCHED_WEIGHT GTP GUEST_PERF_EVENTS GVE 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_IRQCHIP HAVE_KVM_IRQ_BYPASS HAVE_KVM_IRQ_ROUTING HAVE_KVM_MSI HAVE_KVM_NO_POLL HAVE_KVM_PFNCACHE HAVE_KVM_PM_NOTIFIER HAVE_KVM_READONLY_MEM 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_ELAN HID_ELECOM HID_ELO HID_EMS_FF HID_EVISION HID_FT260 HID_GEMBIRD HID_GFRM HID_GLORIOUS HID_GOOGLE_STADIA_FF 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_MCP2200 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_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_HID_ACPI I2C_HID_CORE I2C_HID_OF I2C_LJCA 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_ISHTP_ECLITE INTEL_ISH_FIRMWARE_DOWNLOADER INTEL_ISH_HID INTEL_SOC_PMIC_CHTWC INTERVAL_TREE_SPAN_ITER IOMMUFD IOMMUFD_DRIVER IOMMUFD_DRIVER_CORE IOMMUFD_TEST 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_NF_SECURITY IP_NF_TARGET_ECN IP_NF_TARGET_NETMAP IP_NF_TARGET_REDIRECT IP_NF_TARGET_SYNPROXY IP_NF_TARGET_TTL IP_ROUTE_CLASSID IP_SCTP IP_SET IP_SET_BITMAP_IP IP_SET_BITMAP_IPMAC IP_SET_BITMAP_PORT IP_SET_HASH_IP IP_SET_HASH_IPMAC IP_SET_HASH_IPMARK IP_SET_HASH_IPPORT IP_SET_HASH_IPPORTIP IP_SET_HASH_IPPORTNET IP_SET_HASH_MAC IP_SET_HASH_NET IP_SET_HASH_NETIFACE IP_SET_HASH_NETNET IP_SET_HASH_NETPORT IP_SET_HASH_NETPORTNET IP_SET_LIST_SET IP_VS IP_VS_DH IP_VS_FO IP_VS_FTP IP_VS_PROTO_TCP 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_COMPAT NFT_COMPAT_ARP NFT_FWD_NETDEV NF_TABLES NF_TABLES_ARP NF_TABLES_NETDEV RADIO_ADAPTERS RADIO_SI4713 RAS RC_CORE REGULATOR RFKILL SND SOUND STAGING TRANSPARENT_HUGEPAGE TYPEC TYPEC_MUX_PI3USB30532 USB_LJCA USB_ROLES_INTEL_XHCI USB_ROLE_SWITCH VIDEO_DEV VIRTIO_FS WAN ZONE_DEVICE] disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed picked [v6.12 v6.11 v6.10 v6.8 v6.6 v6.4 v6.2 v6.0 v5.17 v5.14 v5.11 v5.8 v5.5 v5.2 v4.20 v4.19] out of 35 release tags testing release v6.12 testing commit adc218676eef25575469234709c2d87185ca223a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: bcaae061e4b9c7560f733874de8edaba8442feba87c1fcedff0675275f319846 all runs: OK false negative chance: 0.000 # git bisect start f486c8aa16b8172f63bddc70116a0c897a7f3f02 adc218676eef25575469234709c2d87185ca223a Bisecting: 6785 revisions left to test after this (roughly 13 steps) [071b34dcf71523a559b6c39f5d21a268a9531b50] Merge tag 'sound-6.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound testing commit 071b34dcf71523a559b6c39f5d21a268a9531b50 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c42174bf0d7fed9944b2df844cf1285e519dd86b0907ba3bdecd29e55bbbdf01 all runs: OK false negative chance: 0.000 # git bisect good 071b34dcf71523a559b6c39f5d21a268a9531b50 Bisecting: 3368 revisions left to test after this (roughly 12 steps) [0637a68b9c6c1dfffcc1fca003cb7cd3257c3c03] Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi testing commit 0637a68b9c6c1dfffcc1fca003cb7cd3257c3c03 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 38c165a9bd93c62e71803da3cec627fd947ba85c826d433562a3cb307c0193b7 all runs: OK false negative chance: 0.000 # git bisect good 0637a68b9c6c1dfffcc1fca003cb7cd3257c3c03 Bisecting: 1807 revisions left to test after this (roughly 11 steps) [6dbb9a0417c6d33925544984cd83c3ffd855f4c8] Merge branch 'xtensa-for-next' of git://github.com/jcmvbkbc/linux-xtensa.git testing commit 6dbb9a0417c6d33925544984cd83c3ffd855f4c8 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: da25bc38b43ca885a1b813d9011999f29837326e3a8501c3c80f49502f087152 all runs: OK false negative chance: 0.000 # git bisect good 6dbb9a0417c6d33925544984cd83c3ffd855f4c8 Bisecting: 857 revisions left to test after this (roughly 10 steps) [01d295f33952f13cbac16567507bd7103a835982] Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git testing commit 01d295f33952f13cbac16567507bd7103a835982 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 571e4ece92fe06bcb0978ebaf218c636e302e3e38fe8007faaa1f6fcca401bab all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in exfat_init_ext_entry representative crash: BUG: unable to handle kernel NULL pointer dereference in exfat_init_ext_entry, types: [UNKNOWN] # git bisect bad 01d295f33952f13cbac16567507bd7103a835982 Bisecting: 485 revisions left to test after this (roughly 9 steps) [d96c4686c7f9a163eda66f3080f32888ab979dc5] Merge branch 'for-linux-next' of https://gitlab.freedesktop.org/drm/misc/kernel.git testing commit d96c4686c7f9a163eda66f3080f32888ab979dc5 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ac68e5768d8970b6547e2627028e6a3237d5168c1012c0a86e90b7783998e848 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in exfat_init_ext_entry representative crash: BUG: unable to handle kernel NULL pointer dereference in exfat_init_ext_entry, types: [UNKNOWN] # git bisect bad d96c4686c7f9a163eda66f3080f32888ab979dc5 Bisecting: 231 revisions left to test after this (roughly 8 steps) [70782f9c92cde21f3d144b78982157dbe8cfafc8] Merge branch 'linux-next' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6.git testing commit 70782f9c92cde21f3d144b78982157dbe8cfafc8 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: cef33f672195b942ade3bfeea8f6d4022200dfbe44ee5dd0b2ddca89db35e06b all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in exfat_init_ext_entry representative crash: BUG: unable to handle kernel NULL pointer dereference in exfat_init_ext_entry, types: [UNKNOWN] # git bisect bad 70782f9c92cde21f3d144b78982157dbe8cfafc8 Bisecting: 115 revisions left to test after this (roughly 7 steps) [d4a8d333cdb4ea55031e7a564bd122a193df184d] bcachefs: btree_write_buffer_flush_seq() no longer closes journal testing commit d4a8d333cdb4ea55031e7a564bd122a193df184d gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 49dab2853647106ccfe455f7d06096b48ab207a1949c23f4d54dfcfe7a82ceea all runs: OK false negative chance: 0.000 # git bisect good d4a8d333cdb4ea55031e7a564bd122a193df184d Bisecting: 52 revisions left to test after this (roughly 6 steps) [913d2668d290f31a2f2ce8ec3139d72ae2e72706] Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6.git testing commit 913d2668d290f31a2f2ce8ec3139d72ae2e72706 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 0e76af1db19d8fbe365c3b1d88adfcb5c42af1c6837f9ffc295a05ef7bf47a0f all runs: OK false negative chance: 0.000 # git bisect good 913d2668d290f31a2f2ce8ec3139d72ae2e72706 Bisecting: 25 revisions left to test after this (roughly 5 steps) [79822e71943ab6334d390d78194a31e2c716b296] Merge branch 'ksmbd-for-next' of https://github.com/smfrench/smb3-kernel.git testing commit 79822e71943ab6334d390d78194a31e2c716b296 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 079e5a2ba7cc5e8697419878077a63a8bf1d3a228997c198fb79a572276c50c6 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in exfat_init_ext_entry representative crash: BUG: unable to handle kernel NULL pointer dereference in exfat_init_ext_entry, types: [UNKNOWN] # git bisect bad 79822e71943ab6334d390d78194a31e2c716b296 Bisecting: 10 revisions left to test after this (roughly 4 steps) [c5fe001ea8215c80538cc0466bfddef539cb3dc6] Merge branch 'dev' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/exfat.git testing commit c5fe001ea8215c80538cc0466bfddef539cb3dc6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1285a23218dc56208c2a20e3a1fbf40e6cef98874e18c7bc3ec033a65bfab843 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in exfat_init_ext_entry representative crash: BUG: unable to handle kernel NULL pointer dereference in exfat_init_ext_entry, types: [UNKNOWN] # git bisect bad c5fe001ea8215c80538cc0466bfddef539cb3dc6 Bisecting: 7 revisions left to test after this (roughly 3 steps) [33a86666d37ed44a7280adcc6ca293f7718507b2] exfat: remove argument 'p_dir' from exfat_add_entry() testing commit 33a86666d37ed44a7280adcc6ca293f7718507b2 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e410bb65bfc2c49275eb7d3c0ee5e07bd84d8c04c637c8ca9b6aecd86293f8c2 all runs: OK false negative chance: 0.000 # git bisect good 33a86666d37ed44a7280adcc6ca293f7718507b2 Bisecting: 3 revisions left to test after this (roughly 2 steps) [fba133a3411847db49297c965218400c49571ebd] ecryptfs: Remove unused declartion ecryptfs_fill_zeros() testing commit fba133a3411847db49297c965218400c49571ebd gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 22510c62a7c6abd5b17ebbbe34f0bfeba598cb043c6dca941006525bcb472b3d all runs: OK false negative chance: 0.000 # git bisect good fba133a3411847db49297c965218400c49571ebd Bisecting: 1 revision left to test after this (roughly 1 step) [8a3f5711ad74db9881b289a6e34d7f3b700df720] exfat: reduce FAT chain traversal testing commit 8a3f5711ad74db9881b289a6e34d7f3b700df720 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7ad9e11b383a304123b4af76527b196a9aa271e6f1977e47849232df5569e58d all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in exfat_init_ext_entry representative crash: BUG: unable to handle kernel NULL pointer dereference in exfat_init_ext_entry, types: [UNKNOWN] # git bisect bad 8a3f5711ad74db9881b289a6e34d7f3b700df720 Bisecting: 0 revisions left to test after this (roughly 0 steps) [6b151eb5df78dc1a1ea7c862834199e08ea11c7b] exfat: code cleanup for exfat_readdir() testing commit 6b151eb5df78dc1a1ea7c862834199e08ea11c7b gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a22dad0c8fd864c7905f210befaa5f8a2c0d28fc1345dcd241a33d2b7ce234b8 all runs: OK false negative chance: 0.000 # git bisect good 6b151eb5df78dc1a1ea7c862834199e08ea11c7b 8a3f5711ad74db9881b289a6e34d7f3b700df720 is the first bad commit commit 8a3f5711ad74db9881b289a6e34d7f3b700df720 Author: Yuezhang Mo Date: Thu Sep 12 16:57:06 2024 +0800 exfat: reduce FAT chain traversal Before this commit, ->dir and ->entry of exfat_inode_info record the first cluster of the parent directory and the directory entry index starting from this cluster. The directory entry set will be gotten during write-back-inode/rmdir/ unlink/rename. If the clusters of the parent directory are not continuous, the FAT chain will be traversed from the first cluster of the parent directory to find the cluster where ->entry is located. After this commit, ->dir records the cluster where the first directory entry in the directory entry set is located, and ->entry records the directory entry index in the cluster, so that there is almost no need to access the FAT when getting the directory entry set. Signed-off-by: Yuezhang Mo Reviewed-by: Aoyama Wataru Reviewed-by: Daniel Palmer Reviewed-by: Sungjong Seo Signed-off-by: Namjae Jeon fs/exfat/dir.c | 5 +++-- fs/exfat/exfat_fs.h | 4 ++++ fs/exfat/namei.c | 32 +++++++++++++++++++++++++------- 3 files changed, 32 insertions(+), 9 deletions(-) accumulated error probability: 0.00 culprit signature: 7ad9e11b383a304123b4af76527b196a9aa271e6f1977e47849232df5569e58d parent signature: a22dad0c8fd864c7905f210befaa5f8a2c0d28fc1345dcd241a33d2b7ce234b8 revisions tested: 21, total time: 7h25m58.118210484s (build: 4h28m27.720437621s, test: 2h41m58.713642552s) first bad commit: 8a3f5711ad74db9881b289a6e34d7f3b700df720 exfat: reduce FAT chain traversal recipients (to): ["daniel.palmer@sony.com" "linkinjeon@kernel.org" "sj1557.seo@samsung.com" "wataru.aoyama@sony.com" "yuezhang.mo@sony.com"] recipients (cc): [] crash: BUG: unable to handle kernel NULL pointer dereference in exfat_init_ext_entry loop8: rw=524288, sector=165, nr_sectors = 1 limit=64 syz.8.26: attempt to access beyond end of device loop8: rw=524288, sector=166, nr_sectors = 1 limit=64 syz.8.26: attempt to access beyond end of device loop8: rw=524288, sector=167, nr_sectors = 1 limit=64 syz.8.26: attempt to access beyond end of device loop8: rw=0, sector=161, nr_sectors = 1 limit=64 BUG: kernel NULL pointer dereference, address: 0000000000000028 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 800000010b7be067 P4D 800000010b7be067 PUD 10eba5067 PMD 0 Oops: Oops: 0000 [#1] PREEMPT SMP PTI CPU: 0 UID: 0 PID: 5232 Comm: syz.8.26 Not tainted 6.12.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:exfat_get_dentry_cached fs/exfat/dir.c:727 [inline] RIP: 0010:exfat_init_ext_entry+0xba/0x140 fs/exfat/dir.c:498 Code: c0 41 39 f0 0f 84 92 00 00 00 44 89 c0 c1 e0 05 03 47 08 4c 8b 0f 41 0f b6 49 14 4c 63 d0 d3 f8 48 8b 4f 28 48 98 48 8b 04 c1 <48> 8b 40 28 49 8b 49 18 48 ff c9 4c 21 d1 4c 8d 0c 08 66 c7 04 08 RSP: 0018:ffffc9000260b908 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 000000000000007b RCX: ffffc9000260b958 RDX: ffffc9000260bb24 RSI: 0000000000000013 RDI: ffffc9000260b948 RBP: 0000000000000013 R08: 0000000000000010 R09: ffff8881092a4000 R10: 0000000000000200 R11: 000000000000e7e9 R12: ffff888174882ae8 R13: ffffc9000260b948 R14: ffffc9000260bbc8 R15: 000000000000011f FS: 00007fbc23bdb6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000028 CR3: 000000010cb2e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: exfat_add_entry+0x1cc/0x310 fs/exfat/namei.c:517 exfat_create+0xf2/0x200 fs/exfat/namei.c:565 lookup_open fs/namei.c:3649 [inline] open_last_lookups fs/namei.c:3748 [inline] path_openat+0x641/0xdf0 fs/namei.c:3984 do_filp_open+0xc5/0x180 fs/namei.c:4014 do_sys_openat2+0x7e/0xe0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_creat fs/open.c:1495 [inline] __se_sys_creat fs/open.c:1489 [inline] __x64_sys_creat+0x46/0x70 fs/open.c:1489 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x8d/0x170 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbc22d80809 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbc23bdb058 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007fbc22f46080 RCX: 00007fbc22d80809 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000e00 RBP: 00007fbc22df393e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007fbc22f46080 R15: 00007ffc698917c8 Modules linked in: CR2: 0000000000000028 ---[ end trace 0000000000000000 ]--- RIP: 0010:exfat_get_dentry_cached fs/exfat/dir.c:727 [inline] RIP: 0010:exfat_init_ext_entry+0xba/0x140 fs/exfat/dir.c:498 Code: c0 41 39 f0 0f 84 92 00 00 00 44 89 c0 c1 e0 05 03 47 08 4c 8b 0f 41 0f b6 49 14 4c 63 d0 d3 f8 48 8b 4f 28 48 98 48 8b 04 c1 <48> 8b 40 28 49 8b 49 18 48 ff c9 4c 21 d1 4c 8d 0c 08 66 c7 04 08 RSP: 0018:ffffc9000260b908 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 000000000000007b RCX: ffffc9000260b958 RDX: ffffc9000260bb24 RSI: 0000000000000013 RDI: ffffc9000260b948 RBP: 0000000000000013 R08: 0000000000000010 R09: ffff8881092a4000 R10: 0000000000000200 R11: 000000000000e7e9 R12: ffff888174882ae8 R13: ffffc9000260b948 R14: ffffc9000260bbc8 R15: 000000000000011f FS: 00007fbc23bdb6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000028 CR3: 000000010cb2e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: c0 41 39 f0 rolb $0xf0,0x39(%rcx) 4: 0f 84 92 00 00 00 je 0x9c a: 44 89 c0 mov %r8d,%eax d: c1 e0 05 shl $0x5,%eax 10: 03 47 08 add 0x8(%rdi),%eax 13: 4c 8b 0f mov (%rdi),%r9 16: 41 0f b6 49 14 movzbl 0x14(%r9),%ecx 1b: 4c 63 d0 movslq %eax,%r10 1e: d3 f8 sar %cl,%eax 20: 48 8b 4f 28 mov 0x28(%rdi),%rcx 24: 48 98 cltq 26: 48 8b 04 c1 mov (%rcx,%rax,8),%rax * 2a: 48 8b 40 28 mov 0x28(%rax),%rax <-- trapping instruction 2e: 49 8b 49 18 mov 0x18(%r9),%rcx 32: 48 ff c9 dec %rcx 35: 4c 21 d1 and %r10,%rcx 38: 4c 8d 0c 08 lea (%rax,%rcx,1),%r9 3c: 66 data16 3d: c7 .byte 0xc7 3e: 04 08 add $0x8,%al