ci starts bisection 2025-02-01 13:01:30.570146903 +0000 UTC m=+2701.682965444 bisecting cause commit starting from 69e858e0b8b2ea07759e995aa383e8780d9d140c building syzkaller on aa47157c8ec3df5a6d16e3866b095c8f91026465 ensuring issue is reproducible on original commit 69e858e0b8b2ea07759e995aa383e8780d9d140c testing commit 69e858e0b8b2ea07759e995aa383e8780d9d140c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f590c9508b3cb4a2b0d8f49a6c90347cdbc5111ef40d79a8b8212a99c342a7d8 all runs: crashed: general protection fault in d_splice_alias representative crash: general protection fault in d_splice_alias, 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 69e858e0b8b2ea07759e995aa383e8780d9d140c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 277ba858ade6e1cb42479efc457e25042bc9b483bec7a1889bfc36ce96e906a9 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in d_splice_alias representative crash: BUG: unable to handle kernel NULL pointer dereference in d_splice_alias, types: [UNKNOWN] the bug reproduces without the instrumentation disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed kconfig minimization: base=4065 full=8260 leaves diff=2114 split chunks (needed=false): <2114> split chunk #0 of len 2114 into 5 parts testing without sub-chunk 1/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN LOCKDEP], they are not needed testing commit 69e858e0b8b2ea07759e995aa383e8780d9d140c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 973e9e47682510f308e9e7411c66d7c91fd6c305aea9ebd859257a6b1dc0fccc all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in d_splice_alias representative crash: BUG: unable to handle kernel NULL pointer dereference in d_splice_alias, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit 69e858e0b8b2ea07759e995aa383e8780d9d140c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 failed building 69e858e0b8b2ea07759e995aa383e8780d9d140c: 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 [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit 69e858e0b8b2ea07759e995aa383e8780d9d140c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6b87a10de0eb61b8dcdd101f5b39015d4cc7dae9043060ea155d0b1aabb9289c all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in d_splice_alias representative crash: BUG: unable to handle kernel NULL pointer dereference in d_splice_alias, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 69e858e0b8b2ea07759e995aa383e8780d9d140c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 19f02842302936e66616c01f8793f6b759e9130bdb2ca49b50c267e69ca08455 all runs: OK false negative chance: 0.000 testing without sub-chunk 5/5 disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit 69e858e0b8b2ea07759e995aa383e8780d9d140c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6a835345540c7f1adef10f742f8539dd7ca3830b9abd871967b1ee5bf4d04ec0 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in d_splice_alias representative crash: BUG: unable to handle kernel NULL pointer dereference in d_splice_alias, types: [UNKNOWN] the chunk can be dropped minimized to 846 configs; suspects: [6LOWPAN AF_RXRPC ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI ATM AX25 BT BT_BREDR BT_HIDP BXT_WC_PMIC_OPREGION CFG80211 CHARGER_BQ24190 CMA COMMON_CLK DAX DLM DRM DRM_BRIDGE DRM_GUD DRM_I915 DRM_I915_CAPTURE_ERROR DRM_I915_COMPRESS_ERROR 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 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_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 GENEVE 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 GTP GUEST_PERF_EVENTS GVE HAMRADIO HAVE_ARCH_NODE_DEV_GROUP HAVE_ARCH_USERFAULTFD_MINOR HAVE_ARCH_USERFAULTFD_WP HAVE_BOOTMEM_INFO_NODE HAVE_CLK 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_NVIDIA_SHIELD HID_ORTEK HID_PENMOUNT HID_PICOLCD HID_PICOLCD_BACKLIGHT HID_PICOLCD_CIR HID_PICOLCD_FB HID_PICOLCD_LCD HID_PICOLCD_LEDS HID_PLANTRONICS HID_PLAYSTATION 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_SMARTJOYPLUS HID_SPEEDLINK HID_STEAM HID_STEELSERIES HID_THINGM HID_THRUSTMASTER 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 INFINIBAND_VIRT_DMA INPUT_ATI_REMOTE2 INPUT_CM109 INPUT_IMS_PCU INPUT_JOYDEV INPUT_KEYSPAN_REMOTE INPUT_LEDS INPUT_MOUSEDEV INPUT_MOUSEDEV_PSAUX INPUT_POWERMATE INPUT_TABLET INPUT_TOUCHSCREEN 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_SCU_IPC INTEL_SOC_PMIC_BXTWC 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 IRQ_TIME_ACCOUNTING L2TP LAPB LCD_CLASS_DEVICE LEDS_CLASS_MULTICOLOR LIBNVDIMM MAC80211 MAC802154 MEDIA_COMMON_OPTIONS MEDIA_DIGITAL_TV_SUPPORT MEDIA_PLATFORM_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_INTEL_PMC_BXT MFD_MT6360 MFD_MT6370 MFD_RETU MFD_VIPERBOARD MMC MPTCP MTD MTD_UBI NETFILTER_ADVANCED NETFILTER_CONNCOUNT NET_ACT_GACT NET_ACT_MIRRED NET_IPGRE NET_IPGRE_DEMUX NFS_V4_1 NFT_COMPAT NFT_COMPAT_ARP NFT_FWD_NETDEV NF_TABLES NF_TABLES_ARP NF_TABLES_NETDEV NLS_CODEPAGE_1251 NLS_CODEPAGE_737 NLS_CODEPAGE_775 NLS_CODEPAGE_850 NLS_CODEPAGE_852 NLS_CODEPAGE_855 NLS_CODEPAGE_857 NLS_CODEPAGE_860 NLS_CODEPAGE_861 NLS_CODEPAGE_862 NLS_CODEPAGE_863 NLS_CODEPAGE_864 NLS_CODEPAGE_865 NLS_CODEPAGE_866 NLS_CODEPAGE_869 NLS_CODEPAGE_874 NLS_CODEPAGE_932 NLS_CODEPAGE_936 NLS_CODEPAGE_949 NLS_CODEPAGE_950 NLS_ISO8859_13 NLS_ISO8859_14 NLS_ISO8859_15 NLS_ISO8859_2 NLS_ISO8859_3 NLS_ISO8859_4 NLS_ISO8859_5 NLS_ISO8859_6 NLS_ISO8859_7 NLS_ISO8859_8 NLS_ISO8859_9 NLS_KOI8_R NLS_KOI8_U NLS_MAC_CELTIC NLS_MAC_CENTEURO NLS_MAC_CROATIAN NLS_MAC_CYRILLIC NLS_MAC_GAELIC NLS_MAC_GREEK NLS_MAC_ICELAND NLS_MAC_INUIT NLS_MAC_ROMAN NLS_MAC_ROMANIAN NLS_MAC_TURKISH NLS_UCS2_UTILS NOZOMI NTFS3_FS NTFS3_FS_POSIX_ACL NTFS3_LZX_XPRESS NULL_TTY NUMA_BALANCING NUMA_BALANCING_DEFAULT_ENABLED NUMA_EMU NUMA_KEEP_MEMINFO NVDIMM_DAX NVDIMM_KEYS NVDIMM_PFN NVIDIA_SHIELD_FF NVME_CORE NVME_FABRICS NVME_FC NVME_MULTIPATH NVME_RDMA NVME_TARGET NVME_TARGET_FC NVME_TARGET_FCLOOP NVME_TARGET_LOOP NVME_TARGET_RDMA NVME_TARGET_TCP NVME_TCP N_GSM N_HDLC OCFS2_DEBUG_FS OCFS2_FS OCFS2_FS_O2CB OCFS2_FS_STATS OCFS2_FS_USERSPACE_CLUSTER OF_GPIO OF_PMEM OMFS_FS OPENVSWITCH OPENVSWITCH_GENEVE OPENVSWITCH_GRE OPENVSWITCH_VXLAN ORANGEFS_FS OSF_PARTITION OVERLAY_FS OVERLAY_FS_DEBUG OVERLAY_FS_INDEX OVERLAY_FS_REDIRECT_ALWAYS_FOLLOW OVERLAY_FS_REDIRECT_DIR PACKET_DIAG PAGE_IDLE_FLAG PAGE_REPORTING PAHOLE_HAS_LANG_EXCLUDE PAHOLE_HAS_SPLIT_BTF PARPORT PARPORT_NOT_PC PARTITION_ADVANCED PCCARD PCCARD_NONSTATIC PCIEAER PCI_ENDPOINT PCI_IOV PCMCIA PCMCIA_LOAD_CIS PERCPU_STATS PERSISTENT_KEYRINGS PHONET PHYLINK PHY_CPCAP_USB PHY_QCOM_USB_HS PHY_QCOM_USB_HSIC PHY_SAMSUNG_USB2 PHY_TUSB1210 PKCS7_TEST_KEY PKCS8_PRIVATE_KEY_PARSER PLAYSTATION_FF PLFXLC PMIC_OPREGION PM_CLK PNFS_BLOCK PNFS_FILE_LAYOUT PNFS_FLEXFILE_LAYOUT PPP PPPOATM PPPOE PPPOE_HASH_BITS_1 PPPOL2TP PPP_ASYNC PPP_BSDCOMP PPP_DEFLATE PPP_FILTER PPP_MPPE PPP_MULTILINK PPP_SYNC_TTY PPTP PREEMPT PREEMPT_NOTIFIERS PROC_CHILDREN PROC_PID_CPUSET PSAMPLE PSI PSTORE PSTORE_COMPRESS QCOM_QMI_HELPERS QNX4FS_FS QNX6FS_FS QRTR QRTR_TUN RADIO_ADAPTERS RADIO_SHARK RADIO_SHARK2 RADIO_SI4713 RADIO_TEA575X RAID6_PQ RAID_ATTRS RAS RC_ATI_REMOTE RC_CORE RC_DEVICES RC_XBOX_DVD RDMA_RXE RDMA_SIW RDS RDS_RDMA RDS_TCP READ_ONLY_THP_FOR_FS REALTEK_AUTOPM REED_SOLOMON REED_SOLOMON_DEC8 REGMAP REGMAP_I2C REGMAP_IRQ REGMAP_MMIO REGMAP_SPI REGULATOR REGULATOR_FIXED_VOLTAGE REGULATOR_TWL4030 RESET_CONTROLLER RFKILL RFKILL_INPUT RFKILL_LEDS RMI4_2D_SENSOR RMI4_CORE RMI4_F03 RMI4_F03_SERIO RMI4_F11 RMI4_F12 RMI4_F30 RMI4_F3A ROMFS_BACKED_BY_BOTH ROMFS_FS ROMFS_ON_BLOCK ROMFS_ON_MTD ROSE RTC_DRV_HID_SENSOR_TIME RXKAD SCHED_CORE SCREEN_INFO SCSI_FC_ATTRS SCSI_HPSA SCSI_ISCSI_ATTRS SCSI_LOGGING SCSI_NETLINK SCSI_SAS_ATA SCSI_SAS_ATTRS SCSI_SAS_LIBSAS SCSI_SCAN_ASYNC SCSI_SRP_ATTRS SCTP_COOKIE_HMAC_MD5 SCTP_COOKIE_HMAC_SHA1 SCTP_DEFAULT_COOKIE_HMAC_MD5 SECONDARY_TRUSTED_KEYRING SECURITY_INFINIBAND SECURITY_NETWORK_XFRM SENSORS_AQUACOMPUTER_D5NEXT SENSORS_CORSAIR_CPRO SENSORS_CORSAIR_PSU SENSORS_GIGABYTE_WATERFORCE SENSORS_NZXT_KRAKEN2 SENSORS_NZXT_SMART2 SENSORS_POWERZ SERIAL_DEV_BUS SERIAL_DEV_CTRL_TTYPORT SERIAL_MCTRL_GPIO SGI_PARTITION SIGNATURE SIGNED_PE_FILE_VERIFICATION SKB_DECRYPTED SLHC SLIP SLIP_COMPRESSED SLIP_MODE_SLIP6 SLIP_SMART SMARTJOYPLUS_FF SMBFS SMB_SERVER SMC SMC_DIAG SMSC_PHY SMS_SDIO_DRV SMS_SIANO_DEBUGFS SMS_SIANO_MDTV SMS_SIANO_RC SMS_USB_DRV SND SND_ALOOP SND_BCD2000 SND_CTL_FAST_LOOKUP SND_CTL_LED SND_DEBUG SND_DMA_SGBUF SND_DRIVERS SND_DUMMY SND_DYNAMIC_MINORS SND_HDA SND_HDA_CODEC_ANALOG SND_HDA_CODEC_CA0110 SND_HDA_CODEC_CA0132 SND_HDA_CODEC_CIRRUS SND_HDA_CODEC_CMEDIA SND_HDA_CODEC_CONEXANT SND_HDA_CODEC_HDMI SND_HDA_CODEC_REALTEK SND_HDA_CODEC_SI3054 SND_HDA_CODEC_SIGMATEL SND_HDA_CODEC_VIA SND_HDA_COMPONENT SND_HDA_CORE SND_HDA_GENERIC SND_HDA_GENERIC_LEDS SND_HDA_HWDEP SND_HDA_I915 SND_HDA_INPUT_BEEP SND_HDA_INTEL SND_HDA_PATCH_LOADER SND_HDA_RECONFIG SND_HDA_SCODEC_COMPONENT SND_HRTIMER SND_HWDEP SND_INTEL_DSP_CONFIG SND_INTEL_NHLT SND_INTEL_SOUNDWIRE_ACPI SND_JACK SND_JACK_INPUT_DEV SND_MIXER_OSS SND_OSSEMUL SND_PCI SND_PCM SND_PCMCIA SND_PCM_OSS SND_PCM_OSS_PLUGINS SND_PCM_TIMER SND_PCM_XRUN_DEBUG SND_PROC_FS SND_RAWMIDI SND_SEQUENCER SND_SEQUENCER_OSS SND_SEQ_DEVICE SND_SEQ_DUMMY SND_SEQ_HRTIMER_DEFAULT SND_SEQ_MIDI SND_SEQ_MIDI_EVENT SND_SEQ_VIRMIDI SND_SOC SND_SOC_I2C_AND_SPI SND_SOC_SDCA_OPTIONAL SND_SUPPORT_OLD_API SND_TIMER SND_UMP SND_UMP_LEGACY_RAWMIDI SND_USB SND_USB_6FIRE SND_USB_AUDIO SND_USB_AUDIO_MIDI_V2 SND_USB_AUDIO_USE_MEDIA_CONTROLLER SND_USB_CAIAQ SND_USB_CAIAQ_INPUT SND_USB_HIFACE SND_USB_LINE6 SND_USB_POD SND_USB_PODHD SND_USB_TONEPORT SND_USB_UA101 SND_USB_US122L SND_USB_USX2Y SND_USB_VARIAX SND_VERBOSE_PROCFS SND_VIRMIDI SND_VIRTIO SND_VMASTER SND_X86 SOCK_VALIDATE_XMIT SOLARIS_X86_PARTITION SONY_FF SOUND SOUNDWIRE SOUND_OSS_CORE SOUND_OSS_CORE_PRECLAIM SPI SPI_DLN2 SPI_DYNAMIC SPI_LJCA SPI_MASTER SQUASHFS SQUASHFS_4K_DEVBLK_SIZE SQUASHFS_COMPILE_DECOMP_MULTI SQUASHFS_DECOMP_MULTI SQUASHFS_FILE_DIRECT SQUASHFS_LZ4 SQUASHFS_LZO SQUASHFS_XATTR SQUASHFS_XZ SQUASHFS_ZLIB SQUASHFS_ZSTD SSB SSB_PCIHOST_POSSIBLE SSB_PCMCIAHOST_POSSIBLE SSB_SDIOHOST_POSSIBLE STAGING STEAM_FF STP STREAM_PARSER SUNRPC_BACKCHANNEL SUN_PARTITION SW_SYNC SYSFB SYSV68_PARTITION SYSV_FS TABLET_USB_ACECAD TABLET_USB_AIPTEK TABLET_USB_HANWANG TABLET_USB_KBTAB TABLET_USB_PEGASUS TAHVO_USB TAHVO_USB_HOST_BY_DEFAULT TCG_CRB TCG_TIS TCG_TIS_CORE TCG_TPM TCP_CONG_BBR TCP_CONG_BIC TCP_CONG_CDG TCP_CONG_DCTCP TCP_CONG_HSTCP TCP_CONG_HTCP TCP_CONG_HYBLA TCP_CONG_ILLINOIS TCP_CONG_LP TCP_CONG_NV TCP_CONG_SCALABLE TCP_CONG_VEGAS TCP_CONG_VENO TCP_CONG_WESTWOOD TCP_CONG_YEAH TEE TEXTSEARCH TEXTSEARCH_BM TEXTSEARCH_FSM TEXTSEARCH_KMP THP_SWAP THRUSTMASTER_FF TIPC TIPC_CRYPTO TIPC_DIAG TIPC_MEDIA_IB TIPC_MEDIA_UDP TLS TLS_TOE TMPFS_QUOTA TOUCHSCREEN_SUR40 TOUCHSCREEN_USB_3M TOUCHSCREEN_USB_COMPOSITE TOUCHSCREEN_USB_DMC_TSC10 TOUCHSCREEN_USB_E2I TOUCHSCREEN_USB_EASYTOUCH TOUCHSCREEN_USB_EGALAX TOUCHSCREEN_USB_ELO TOUCHSCREEN_USB_ETT_TC45USB TOUCHSCREEN_USB_ETURBO TOUCHSCREEN_USB_GENERAL_TOUCH TOUCHSCREEN_USB_GOTOP TOUCHSCREEN_USB_GUNZE TOUCHSCREEN_USB_IDEALTEK TOUCHSCREEN_USB_IRTOUCH TOUCHSCREEN_USB_ITM TOUCHSCREEN_USB_JASTEC TOUCHSCREEN_USB_NEXIO TOUCHSCREEN_USB_PANJIT TOUCHSCREEN_USB_ZYTRONIC TRANSPARENT_HUGEPAGE TRANSPARENT_HUGEPAGE_MADVISE TTPCI_EEPROM TTY_PRINTK TUN_VNET_CROSS_LE TWL4030_CORE TYPEC TYPEC_ANX7411 TYPEC_DP_ALTMODE TYPEC_FUSB302 TYPEC_HD3SS3220 TYPEC_MT6360 TYPEC_MUX_FSA4480 TYPEC_MUX_GPIO_SBU TYPEC_MUX_INTEL_PMC TYPEC_MUX_NB7VPQ904M TYPEC_MUX_PI3USB30532 TYPEC_MUX_PTN36502 TYPEC_MUX_WCD939X_USBSS TYPEC_NVIDIA_ALTMODE TYPEC_RT1711H TYPEC_RT1719 TYPEC_STUSB160X TYPEC_TCPCI TYPEC_TCPCI_MAXIM TYPEC_TCPCI_MT6370 TYPEC_TCPM TYPEC_TPS6598X TYPEC_UCSI TYPEC_WCOVE TYPEC_WUSB3801 UBIFS_ATIME_SUPPORT UBIFS_FS UBIFS_FS_ADVANCED_COMPR UBIFS_FS_LZO UBIFS_FS_SECURITY UBIFS_FS_XATTR UBIFS_FS_ZLIB UBIFS_FS_ZSTD UCSI_ACPI UCSI_CCG UCSI_STM32G0 UDF_FS UDMABUF UFS_FS UFS_FS_WRITE UHID ULTRIX_PARTITION UNICODE UNIXWARE_DISKLABEL UNIX_DIAG USB4 USB4_NET USBIP_CORE USBIP_HOST USBIP_VHCI_HCD USBIP_VUDC USBPCWATCHDOG USB_ACM USB_ADUTUX USB_AIRSPY USB_ALI_M5632 USB_AN2720 USB_APPLEDISPLAY USB_ARMLINUX USB_BDC_UDC USB_BELKIN USB_C67X00_HCD USB_CATC USB_CDC_PHONET USB_CDNS2_UDC USB_CDNS3 USB_CDNS3_GADGET USB_CDNS3_HOST USB_CDNS3_PCI_WRAP USB_CDNS_SUPPORT USB_DWC2 USB_GADGET USB_LJCA USB_MUSB_HDRC USB_NET_CDC_SUBSET USB_ROLES_INTEL_XHCI USB_ROLE_SWITCH USB_STORAGE_REALTEK USB_ULPI_BUS USB_USBNET VIDEO_DEV VIRTIO_FS VXLAN WAN WIRELESS WLAN WLAN_VENDOR_PURELIFI ZONE_DEVICE] disabling configs for [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed picked [v6.13 v6.12 v6.11 v6.9 v6.7 v6.5 v6.3 v6.1 v5.18 v5.15 v5.12 v5.9 v5.6 v5.3 v5.0 v4.19] out of 36 release tags testing release v6.13 testing commit ffd294d346d185b70e28b1a28abe367bbfe53c04 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 53876949907ffbf2257b231f0f0ed70335c608d1955afbe18c5d699b964ab005 all runs: OK false negative chance: 0.000 # git bisect start 69e858e0b8b2ea07759e995aa383e8780d9d140c ffd294d346d185b70e28b1a28abe367bbfe53c04 Bisecting: 4898 revisions left to test after this (roughly 12 steps) [754916d4a2b970bc1b5104d552b5d16ab54954c0] Merge tag 'caps-6.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/sergeh/linux testing commit 754916d4a2b970bc1b5104d552b5d16ab54954c0 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 83937a7981b19493549bba29a5596adcf2038749a10f6aaa851f16b79c9c0450 all runs: OK false negative chance: 0.000 # git bisect good 754916d4a2b970bc1b5104d552b5d16ab54954c0 Bisecting: 2492 revisions left to test after this (roughly 11 steps) [405057718a1f9074133979a9f2ff0c9fa4a19948] Merge tag 'kgdb-6.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux testing commit 405057718a1f9074133979a9f2ff0c9fa4a19948 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f6535ea656aaa39a6c8fcbc83061b86b0f1340a270350d7d835c479932069316 all runs: OK false negative chance: 0.000 # git bisect good 405057718a1f9074133979a9f2ff0c9fa4a19948 Bisecting: 1233 revisions left to test after this (roughly 10 steps) [cc8b10fa70682218c2a318fc44f71f3175a23cc0] Merge tag 'usb-6.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb testing commit cc8b10fa70682218c2a318fc44f71f3175a23cc0 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: caa7de5ea465d7ff857c391e2329f8c37d1b03777030c7cdd4e6fb60ce486f2f all runs: OK false negative chance: 0.000 # git bisect good cc8b10fa70682218c2a318fc44f71f3175a23cc0 Bisecting: 612 revisions left to test after this (roughly 9 steps) [e2ee2e9b159094527ae7ad78058b1316f62fc5b7] Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux testing commit e2ee2e9b159094527ae7ad78058b1316f62fc5b7 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7d24ada1acfd1b936280a62873540ff52c0cff757a07142c303187669c8462bf all runs: OK false negative chance: 0.000 # git bisect good e2ee2e9b159094527ae7ad78058b1316f62fc5b7 Bisecting: 291 revisions left to test after this (roughly 8 steps) [9f10e7fb6a06bce4f81de5fd0f2f0390f99e89e4] Merge tag 'phy-for-6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/phy/linux-phy testing commit 9f10e7fb6a06bce4f81de5fd0f2f0390f99e89e4 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: bd73400fd010422766cf7e326356f82b1501bd89ac74cd56ec935e67e8aa1ac1 all runs: OK false negative chance: 0.000 # git bisect good 9f10e7fb6a06bce4f81de5fd0f2f0390f99e89e4 Bisecting: 174 revisions left to test after this (roughly 7 steps) [b4b0881156fb8209bf5ef6cb63211bb0ad6e1a6b] Merge tag 'docs-6.14-2' of git://git.lwn.net/linux testing commit b4b0881156fb8209bf5ef6cb63211bb0ad6e1a6b gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 05d9ec88d1513e01b47712120aa8c8a8cd07179734de664bb6c8d016c14de8be all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in d_splice_alias representative crash: BUG: unable to handle kernel NULL pointer dereference in d_splice_alias, types: [UNKNOWN] # git bisect bad b4b0881156fb8209bf5ef6cb63211bb0ad6e1a6b Bisecting: 59 revisions left to test after this (roughly 6 steps) [90cb220062f52c50ad689f40be3aa958a4553204] Merge tag 'gpio-fixes-for-v6.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux testing commit 90cb220062f52c50ad689f40be3aa958a4553204 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1dd1934f8a724c5b399f8e79cda316efe05289c920e94a4254f7dcdf27c8a37f all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in d_splice_alias representative crash: BUG: unable to handle kernel NULL pointer dereference in d_splice_alias, types: [UNKNOWN] # git bisect bad 90cb220062f52c50ad689f40be3aa958a4553204 Bisecting: 27 revisions left to test after this (roughly 5 steps) [8080ff5ac656b9ca6c282e4044be19d2b8a837df] Merge tag 'bcachefs-2025-01-29' of git://evilpiepirate.org/bcachefs testing commit 8080ff5ac656b9ca6c282e4044be19d2b8a837df gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2eecd48c427c75e7db1e0568740805eef0b118d9b514bd3eccf6f73ff39835fc all runs: OK false negative chance: 0.000 # git bisect good 8080ff5ac656b9ca6c282e4044be19d2b8a837df Bisecting: 13 revisions left to test after this (roughly 4 steps) [19e1dbdc6b9e9b069bef94c6856364781338eb76] fuse_dentry_revalidate(): use stable parent inode and name passed by caller testing commit 19e1dbdc6b9e9b069bef94c6856364781338eb76 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b7db5da8d01c5e59c31c7dc25a7328cff2019b7a889a850c92ba75ec8bd4b108 all runs: OK false negative chance: 0.000 # git bisect good 19e1dbdc6b9e9b069bef94c6856364781338eb76 Bisecting: 7 revisions left to test after this (roughly 3 steps) [30d61efe118cad1a73ad2ad66a3298e4abdf9f41] 9p: fix ->rename_sem exclusion testing commit 30d61efe118cad1a73ad2ad66a3298e4abdf9f41 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 23ef33947a3e46565e906ae2658dda0a1411f53206aac708f4c7bca9e77d4775 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in d_splice_alias representative crash: BUG: unable to handle kernel NULL pointer dereference in d_splice_alias, types: [UNKNOWN] # git bisect bad 30d61efe118cad1a73ad2ad66a3298e4abdf9f41 Bisecting: 2 revisions left to test after this (roughly 2 steps) [ffeeaada2bddb88078f16ba24f24ce8651c22d5b] nfs: fix ->d_revalidate() UAF on ->d_name accesses testing commit ffeeaada2bddb88078f16ba24f24ce8651c22d5b gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a0a5cb952b904b32980d235a47474b33d70f3413f1f881f808f766ccb5643dfa all runs: OK false negative chance: 0.000 # git bisect good ffeeaada2bddb88078f16ba24f24ce8651c22d5b Bisecting: 0 revisions left to test after this (roughly 1 step) [90341f22c364d8ad55184ce2b8777545942dc5cf] orangefs_d_revalidate(): use stable parent inode and name passed by caller testing commit 90341f22c364d8ad55184ce2b8777545942dc5cf gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2670def85539f6b4066fafe1a6777f0d1bcc978665fd9ff36e80e25f9e14ef7a all runs: OK false negative chance: 0.000 # git bisect good 90341f22c364d8ad55184ce2b8777545942dc5cf 30d61efe118cad1a73ad2ad66a3298e4abdf9f41 is the first bad commit commit 30d61efe118cad1a73ad2ad66a3298e4abdf9f41 Author: Al Viro Date: Sun Jan 5 21:33:17 2025 -0500 9p: fix ->rename_sem exclusion 9p wants to be able to build a path from given dentry to fs root and keep it valid over a blocking operation. ->s_vfs_rename_mutex would be a natural candidate, but there are places where we need that and where we have no way to tell if ->s_vfs_rename_mutex is already held deeper in callchain. Moreover, it's only held for cross-directory renames; name changes within the same directory happen without it. Solution: * have d_move() done in ->rename() rather than in its caller * maintain a 9p-private rwsem (per-filesystem) * hold it exclusive over the relevant part of ->rename() * hold it shared over the places where we want the path. That almost works. FS_RENAME_DOES_D_MOVE is enough to put all d_move() and d_exchange() calls under filesystem's control. However, there's also __d_unalias(), which isn't covered by any of that. If ->lookup() hits a directory inode with preexisting dentry elsewhere (due to e.g. rename done on server behind our back), d_splice_alias() called by ->lookup() will move/rename that alias. Add a couple of optional methods, so that __d_unalias() would do if alias->d_op->d_unalias_trylock != NULL if (!alias->d_op->d_unalias_trylock(alias)) fail (resulting in -ESTALE from lookup) __d_move(...) if alias->d_op->d_unalias_unlock != NULL alias->d_unalias_unlock(alias) where it currently does __d_move(). 9p instances do down_write_trylock() and up_write() of ->rename_mutex. Signed-off-by: Al Viro Documentation/filesystems/locking.rst | 4 ++++ Documentation/filesystems/vfs.rst | 21 +++++++++++++++++++++ fs/9p/v9fs.h | 2 +- fs/9p/vfs_dentry.c | 16 ++++++++++++++++ fs/dcache.c | 5 +++++ include/linux/dcache.h | 2 ++ 6 files changed, 49 insertions(+), 1 deletion(-) accumulated error probability: 0.00 culprit signature: 23ef33947a3e46565e906ae2658dda0a1411f53206aac708f4c7bca9e77d4775 parent signature: 2670def85539f6b4066fafe1a6777f0d1bcc978665fd9ff36e80e25f9e14ef7a revisions tested: 19, total time: 6h44m1.398936661s (build: 3h24m8.580600077s, test: 2h54m10.76353521s) first bad commit: 30d61efe118cad1a73ad2ad66a3298e4abdf9f41 9p: fix ->rename_sem exclusion recipients (to): ["asmadeus@codewreck.org" "corbet@lwn.net" "ericvh@kernel.org" "linux-doc@vger.kernel.org" "linux-fsdevel@vger.kernel.org" "lucho@ionkov.net" "v9fs@lists.linux.dev" "viro@zeniv.linux.org.uk" "willy@infradead.org"] recipients (cc): ["amir73il@gmail.com" "brauner@kernel.org" "jack@suse.cz" "linux-kernel@vger.kernel.org" "linux_oss@crudebyte.com" "mjguzik@gmail.com" "viro@zeniv.linux.org.uk"] crash: BUG: unable to handle kernel NULL pointer dereference in d_splice_alias loop3: detected capacity change from 0 to 2048 UDF-fs: error (device loop3): udf_process_sequence: Primary Volume Descriptor not found! UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) BUG: kernel NULL pointer dereference, address: 0000000000000068 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 121aec067 P4D 121aec067 PUD 121af0067 PMD 0 Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 0 UID: 0 PID: 4265 Comm: syz.3.16 Not tainted 6.13.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 RIP: 0010:__d_unalias fs/dcache.c:2970 [inline] RIP: 0010:d_splice_alias+0x198/0x330 fs/dcache.c:3038 Code: 00 e8 6c e1 d9 ff 85 c0 0f 84 9e 01 00 00 49 8b 87 28 ff ff ff 48 8b 40 68 48 05 d8 00 00 00 48 89 04 24 49 8b 87 70 ff ff ff <48> 8b 40 68 48 85 c0 74 10 4c 89 f7 e8 47 ee ac 01 84 c0 0f 84 5f RSP: 0018:ffffc90003777d88 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88810c618d28 RCX: ffffc90003777d3c RDX: 0000000000000002 RSI: ffffffff83df15f2 RDI: 00000000ffffffff RBP: ffff88810a480138 R08: 0000000000000000 R09: ffff888104395fa0 R10: 0000000000000001 R11: 00000000000000fe R12: 0000000000000000 R13: ffff88810a480618 R14: ffff88810a480c30 R15: ffff88810a480d58 FS: 00007fe2419ff6c0(0000) GS:ffff88813ba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000068 CR3: 00000001073a6000 CR4: 0000000000350ef0 Call Trace: udf_lookup+0x95/0xe0 fs/udf/namei.c:130 lookup_one_qstr_excl+0x6d/0xa0 fs/namei.c:1693 do_rmdir+0x11c/0x1c0 fs/namei.c:4444 __do_sys_rmdir fs/namei.c:4474 [inline] __se_sys_rmdir fs/namei.c:4472 [inline] __x64_sys_rmdir+0x3a/0x70 fs/namei.c:4472 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x6d/0x170 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe241f8cda9 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:00007fe2419ff038 EFLAGS: 00000246 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 00007fe2421a5fa0 RCX: 00007fe241f8cda9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100 RBP: 00007fe24200e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fe2421a5fa0 R15: 00007ffcdfec0cf8 Modules linked in: CR2: 0000000000000068 ---[ end trace 0000000000000000 ]--- RIP: 0010:__d_unalias fs/dcache.c:2970 [inline] RIP: 0010:d_splice_alias+0x198/0x330 fs/dcache.c:3038 Code: 00 e8 6c e1 d9 ff 85 c0 0f 84 9e 01 00 00 49 8b 87 28 ff ff ff 48 8b 40 68 48 05 d8 00 00 00 48 89 04 24 49 8b 87 70 ff ff ff <48> 8b 40 68 48 85 c0 74 10 4c 89 f7 e8 47 ee ac 01 84 c0 0f 84 5f RSP: 0018:ffffc90003777d88 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88810c618d28 RCX: ffffc90003777d3c RDX: 0000000000000002 RSI: ffffffff83df15f2 RDI: 00000000ffffffff RBP: ffff88810a480138 R08: 0000000000000000 R09: ffff888104395fa0 R10: 0000000000000001 R11: 00000000000000fe R12: 0000000000000000 R13: ffff88810a480618 R14: ffff88810a480c30 R15: ffff88810a480d58 FS: 00007fe2419ff6c0(0000) GS:ffff88813ba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000068 CR3: 00000001073a6000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: e8 6c e1 d9 ff call 0xffd9e171 5: 85 c0 test %eax,%eax 7: 0f 84 9e 01 00 00 je 0x1ab d: 49 8b 87 28 ff ff ff mov -0xd8(%r15),%rax 14: 48 8b 40 68 mov 0x68(%rax),%rax 18: 48 05 d8 00 00 00 add $0xd8,%rax 1e: 48 89 04 24 mov %rax,(%rsp) 22: 49 8b 87 70 ff ff ff mov -0x90(%r15),%rax * 29: 48 8b 40 68 mov 0x68(%rax),%rax <-- trapping instruction 2d: 48 85 c0 test %rax,%rax 30: 74 10 je 0x42 32: 4c 89 f7 mov %r14,%rdi 35: e8 47 ee ac 01 call 0x1acee81 3a: 84 c0 test %al,%al 3c: 0f .byte 0xf 3d: 84 .byte 0x84 3e: 5f pop %rdi