ci2 starts bisection 2025-03-06 01:29:33.034332653 +0000 UTC m=+12650.123498315 bisecting cause commit starting from 7eb172143d5508b4da468ed59ee857c6e5e01da6 building syzkaller on c3901742785ff25afdc6f470af7b25b69d7c4f2f ensuring issue is reproducible on original commit 7eb172143d5508b4da468ed59ee857c6e5e01da6 testing commit 7eb172143d5508b4da468ed59ee857c6e5e01da6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 52d31d22f9fefe5c15aa911bbdd89be8061b6b1cba9171f183e16c6104b871f3 run #0: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #1: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #2: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #3: crashed: KASAN: out-of-bounds Write in ext4_insert_dentry run #4: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #5: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #6: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #7: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #8: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #9: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #10: crashed: general protection fault in cfg80211_inform_single_bss_data run #11: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #12: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #13: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #14: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #15: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #16: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #17: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #18: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #19: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry representative crash: KASAN: use-after-free Write in ext4_insert_dentry, types: [KASAN] check whether we can drop unnecessary instrumentation disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG LOCKDEP], they are not needed testing commit 7eb172143d5508b4da468ed59ee857c6e5e01da6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9012e934853010753bca04bffdac03f5ddd98ec64e33348cb76da3539210239f run #0: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #1: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #2: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #3: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #4: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #5: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #6: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #7: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #8: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #9: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry representative crash: KASAN: use-after-free Write in ext4_insert_dentry, types: [KASAN] the bug reproduces without the instrumentation disabling configs for [UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed kconfig minimization: base=4054 full=8254 leaves diff=2116 split chunks (needed=false): <2116> split chunk #0 of len 2116 into 5 parts testing without sub-chunk 1/5 disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 7eb172143d5508b4da468ed59ee857c6e5e01da6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 756a368e9bfd1026780654fe79542903137f0de0d6caf2a26b59982393748bc1 run #0: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #1: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #2: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #3: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #4: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #5: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #6: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #7: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #8: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #9: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry representative crash: KASAN: slab-use-after-free Write in ext4_insert_dentry, types: [KASAN] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [BUG LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 7eb172143d5508b4da468ed59ee857c6e5e01da6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 failed building 7eb172143d5508b4da468ed59ee857c6e5e01da6: 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 [ATOMIC_SLEEP HANG LEAK UBSAN BUG LOCKDEP], they are not needed testing commit 7eb172143d5508b4da468ed59ee857c6e5e01da6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 60e82f4074fa4c7109b87134aa310c73ee6aa16f23d6af82f04085e44c8ba56d all runs: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry representative crash: KASAN: slab-use-after-free Write in ext4_insert_dentry, types: [KASAN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit 7eb172143d5508b4da468ed59ee857c6e5e01da6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d6dba38a6ffa3cc23265fd45db20ec9f21f345b89b94ff773442d1df6f50a96c run #0: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #1: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #2: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #3: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #4: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #5: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #6: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #7: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #8: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #9: crashed: KASAN: use-after-free Write in ext4_insert_dentry representative crash: KASAN: slab-use-after-free Write in ext4_insert_dentry, types: [KASAN] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 7eb172143d5508b4da468ed59ee857c6e5e01da6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c0c9561fd58781a4c5236ba1e0284b88dc9b217a59b41b3eb78c672d68bddf26 run #0: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #1: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #2: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #3: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #4: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #5: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #6: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #7: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #8: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #9: crashed: KASAN: use-after-free Write in ext4_insert_dentry representative crash: KASAN: slab-use-after-free Write in ext4_insert_dentry, types: [KASAN] the chunk can be dropped minimized to 424 configs; suspects: [6LOWPAN ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI CHARGER_BQ24190 CMA COMMON_CLK DAX DLM DRM DRM_BRIDGE 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 EVM_EXTRA_SMACK_XATTRS 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 GENDWARFKSYMS 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 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 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 MODVERSIONS 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 [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], 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: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b7fff4acbd7a106f3320f0350b793a10306cc64058ebc769415e9b2bc184d23d run #0: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #1: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #2: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #3: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #4: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #5: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #6: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #7: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #8: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry run #9: crashed: KASAN: slab-use-after-free Write in ext4_insert_dentry representative crash: KASAN: use-after-free Write in ext4_insert_dentry, types: [KASAN] 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: 770fe2c74186f3157d30d0136e5a7ce96c8e765e3ef44cd0aa3b8d3c0be6e2ed all runs: crashed: KASAN: use-after-free Write in ext4_insert_dentry representative crash: KASAN: use-after-free Write in ext4_insert_dentry, types: [KASAN] testing release v6.11 testing commit 98f7e32f20d28ec452afb208f9cffc08448a2652 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5e23b0eb4b936db4aad21d308d3882184a1fb750290e24d478647f3d7a1f0f26 all runs: crashed: KASAN: use-after-free Write in ext4_insert_dentry representative crash: KASAN: use-after-free Write in ext4_insert_dentry, types: [KASAN] testing release v6.9 testing commit a38297e3fb012ddfa7ce0321a7e5a8daeb1872b6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a5a7c491d8f4310997a209a2660a2033944018467f45c7523275743c227c0cf1 run #0: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #1: crashed: KASAN: out-of-bounds Write in ext4_insert_dentry run #2: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #3: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #4: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #5: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #6: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #7: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #8: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #9: crashed: KASAN: use-after-free Write in ext4_insert_dentry representative crash: KASAN: use-after-free Write in ext4_insert_dentry, types: [KASAN] testing release v6.7 testing commit 0dd3ee31125508cd67f7e7172247f05b7fd1753a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3a8ac63dc057ea9bce870e574d5011d5020c74f9ca3a5d8712d41d8957d24974 run #0: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #1: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #2: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #3: crashed: KASAN: out-of-bounds Write in ext4_insert_dentry run #4: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #5: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #6: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #7: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #8: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #9: crashed: KASAN: use-after-free Write in ext4_insert_dentry representative crash: KASAN: use-after-free Write in ext4_insert_dentry, types: [KASAN] testing release v6.5 testing commit 2dde18cd1d8fac735875f2e4987f11817cc0bc2c gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c255293f6f845cb2819201d30cf295f4ab6596b5ffe47958b1f2bc54bf223ece all runs: crashed: KASAN: use-after-free Write in ext4_insert_dentry representative crash: KASAN: use-after-free Write in ext4_insert_dentry, types: [KASAN] testing release v6.3 testing commit 457391b0380335d5e9a5babdec90ac53928b23b4 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c044477b7988af7f5f6840637c2bf48946fb6b1b7aacaebff7c272b3105ba635 all runs: crashed: KASAN: use-after-free Write in ext4_insert_dentry representative crash: KASAN: use-after-free Write in ext4_insert_dentry, types: [KASAN] testing release v6.1 testing commit 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 0269d423bd29cb48e33b9d227a04a702873a44fe5d1946f9baeea3f73808613f run #0: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #1: crashed: KASAN: out-of-bounds Write in ext4_insert_dentry run #2: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #3: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #4: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #5: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #6: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #7: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #8: crashed: KASAN: use-after-free Write in ext4_insert_dentry run #9: crashed: KASAN: use-after-free Write in ext4_insert_dentry representative crash: KASAN: use-after-free Write in ext4_insert_dentry, types: [KASAN] testing release v5.18 testing commit 4b0986a3613c92f4ec1bdc7f60ec66fea135991f gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 498c251ff9621ea44d09dc70b11485b2bd900809854074f483f9c5a67dd44975 all runs: crashed: KASAN: use-after-free Write in ext4_insert_dentry representative crash: KASAN: use-after-free Write in ext4_insert_dentry, types: [KASAN] testing release v5.15 testing commit 8bb7eca972ad531c9b149c0a51ab43a417385813 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2418d479314f27052eed77dac764f4b86bda8e1277161ab6c2d3f849b203328f all runs: crashed: KASAN: use-after-free Write in ext4_insert_dentry representative crash: KASAN: use-after-free Write in ext4_insert_dentry, types: [KASAN] testing release v5.12 testing commit 9f4ad9e425a1d3b6a34617b8ea226d56a119a717 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3a4b10ee28ae4a8faa7c8123fd4ccf2d5019549fa89d18064e840b27aecda634 run #0: crashed: KASAN: use-after-free Write in add_dirent_to_buf run #1: crashed: KASAN: use-after-free Write in add_dirent_to_buf run #2: crashed: KASAN: out-of-bounds Write in add_dirent_to_buf run #3: crashed: KASAN: use-after-free Write in add_dirent_to_buf run #4: crashed: KASAN: use-after-free Write in add_dirent_to_buf run #5: crashed: KASAN: use-after-free Write in add_dirent_to_buf run #6: crashed: KASAN: use-after-free Write in add_dirent_to_buf run #7: crashed: KASAN: use-after-free Write in add_dirent_to_buf run #8: crashed: KASAN: use-after-free Write in add_dirent_to_buf run #9: crashed: KASAN: use-after-free Write in add_dirent_to_buf representative crash: KASAN: use-after-free Write in add_dirent_to_buf, types: [KASAN] testing release v5.9 testing commit bbf5c979011a099af5dc76498918ed7df445635b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3e6249a5136ccd8268563c07a84c1585c14d36a2cf665aeb1d419504082bab07 all runs: crashed: KASAN: use-after-free Write in add_dirent_to_buf representative crash: KASAN: use-after-free Write in add_dirent_to_buf, types: [KASAN] testing release v5.6 testing commit 7111951b8d4973bda27ff663f2cf18b663d15b48 gcc compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: ae4435c475058787f187bdfe71603c0780fe328b3456f05cc036c06290375780 all runs: OK false negative chance: 0.000 # git bisect start bbf5c979011a099af5dc76498918ed7df445635b 7111951b8d4973bda27ff663f2cf18b663d15b48 Bisecting: 24595 revisions left to test after this (roughly 15 steps) [828f3e18e1cb98c68fc6db4d5113513d4a267775] Merge tag 'arm-drivers-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc testing commit 828f3e18e1cb98c68fc6db4d5113513d4a267775 gcc compiler: gcc version 8.4.1 20210217 (GCC), GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 23d2d7a727bb663796d50383075dc980bc0e5dc83e6b6ca4b9be662f44441a24 all runs: OK false negative chance: 0.000 # git bisect good 828f3e18e1cb98c68fc6db4d5113513d4a267775 Bisecting: 12193 revisions left to test after this (roughly 14 steps) [ecfd7940b8641da6e41ca94eba36876dc2ba827b] Merge tag 'usb-5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb testing commit ecfd7940b8641da6e41ca94eba36876dc2ba827b gcc compiler: gcc (GCC) 8.4.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 43bc3f9b024a15223a2f4347b307529549275167c6533a9d6fcbb711008e66e2 all runs: OK false negative chance: 0.000 # git bisect good ecfd7940b8641da6e41ca94eba36876dc2ba827b Bisecting: 6014 revisions left to test after this (roughly 13 steps) [dfdf16ecfd6abafc22b7f02364d9bb879ca8a5ee] Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi testing commit dfdf16ecfd6abafc22b7f02364d9bb879ca8a5ee gcc compiler: gcc (GCC) 8.4.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 72da4f096d80e5e1cf6e070209952f34c6152978455b32fde22ab1a635a6740d all runs: OK false negative chance: 0.000 # git bisect good dfdf16ecfd6abafc22b7f02364d9bb879ca8a5ee Bisecting: 2991 revisions left to test after this (roughly 12 steps) [8cd84b709647a015790a94bc809068b7a55cc05a] Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm testing commit 8cd84b709647a015790a94bc809068b7a55cc05a gcc compiler: gcc (GCC) 8.4.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 78d49ebf16931b850b2be020324fb3853d7c5da25fab7e8af981136fecf5647e all runs: OK false negative chance: 0.000 # git bisect good 8cd84b709647a015790a94bc809068b7a55cc05a Bisecting: 1546 revisions left to test after this (roughly 11 steps) [830fadfd954c6782b7a8a2461c76a568c7153b9a] perf tools: Add bpf image check to __map__is_kmodule testing commit 830fadfd954c6782b7a8a2461c76a568c7153b9a gcc compiler: gcc (GCC) 8.4.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 004696d5cf6abcf0f7913dd30b9e1b90335fc3f0dee4d7692bee12b776b6c550 all runs: crashed: KASAN: use-after-free Write in add_dirent_to_buf representative crash: KASAN: use-after-free Write in add_dirent_to_buf, types: [KASAN] # git bisect bad 830fadfd954c6782b7a8a2461c76a568c7153b9a Bisecting: 722 revisions left to test after this (roughly 10 steps) [9553b62c1dd27df67ab2f52ec8a3bc3501887619] net: atlantic: Use readx_poll_timeout() for large timeout testing commit 9553b62c1dd27df67ab2f52ec8a3bc3501887619 gcc compiler: gcc (GCC) 8.4.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3de3187238ebe02eed1f19219147253e810e636d54af1853f18a68c2436a84a2 all runs: OK false negative chance: 0.000 # git bisect good 9553b62c1dd27df67ab2f52ec8a3bc3501887619 Bisecting: 360 revisions left to test after this (roughly 9 steps) [abb3438d69fb6dd5baa4ae23eafbf5b87945eff1] Merge tag 'm68knommu-for-v5.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu testing commit abb3438d69fb6dd5baa4ae23eafbf5b87945eff1 gcc compiler: gcc (GCC) 8.4.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e4aa78b10209cd2142c7112088f7fbdfd5a008596128489ee370950af6158dad all runs: crashed: KASAN: use-after-free Write in add_dirent_to_buf representative crash: KASAN: use-after-free Write in add_dirent_to_buf, types: [KASAN] # git bisect bad abb3438d69fb6dd5baa4ae23eafbf5b87945eff1 Bisecting: 179 revisions left to test after this (roughly 8 steps) [f873db9acd3c92d4741bc3676c9eb511b2f9a6f6] Merge tag 'io_uring-5.9-2020-08-21' of git://git.kernel.dk/linux-block testing commit f873db9acd3c92d4741bc3676c9eb511b2f9a6f6 gcc compiler: gcc (GCC) 8.4.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7f211f499dc922e1b500a47f5e43ce71563846b77f25857bbfe5811e4625cd4b all runs: crashed: KASAN: use-after-free Write in add_dirent_to_buf representative crash: KASAN: use-after-free Write in add_dirent_to_buf, types: [KASAN] # git bisect bad f873db9acd3c92d4741bc3676c9eb511b2f9a6f6 Bisecting: 89 revisions left to test after this (roughly 7 steps) [7f04f3ed621fd345ca1b01ec6e98c9b85d95851f] Merge tag 'sound-5.9-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound testing commit 7f04f3ed621fd345ca1b01ec6e98c9b85d95851f gcc compiler: gcc (GCC) 8.4.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c90ebf26a0cce4014a6d2a1f9ec25c17ea51e15e215f79a4bd717e215dd6239e all runs: OK false negative chance: 0.000 # git bisect good 7f04f3ed621fd345ca1b01ec6e98c9b85d95851f Bisecting: 44 revisions left to test after this (roughly 6 steps) [66d5e0277e225cdc5d272fc22b1aa90a9b0d21ac] ext4: reorganize if statement of ext4_mb_release_context() testing commit 66d5e0277e225cdc5d272fc22b1aa90a9b0d21ac gcc compiler: gcc (GCC) 8.4.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3ee8b8ed16714cf07587a9da4edbd0c0cc77d8bf311f5d4e8d5e710040af03a0 all runs: crashed: KASAN: use-after-free Write in add_dirent_to_buf representative crash: KASAN: use-after-free Write in add_dirent_to_buf, types: [KASAN] # git bisect bad 66d5e0277e225cdc5d272fc22b1aa90a9b0d21ac Bisecting: 22 revisions left to test after this (roughly 5 steps) [3d392b2676bf3199863a1e5efb2c087ad9d442a4] ext4: add prefetch_block_bitmaps mount option testing commit 3d392b2676bf3199863a1e5efb2c087ad9d442a4 gcc compiler: gcc (GCC) 8.4.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 93bd2822e7c253ec76f6ebfeaaf1a4d0497f6ec31eaa71bdd9706f775cd1b091 all runs: crashed: KASAN: use-after-free Write in add_dirent_to_buf representative crash: KASAN: use-after-free Write in add_dirent_to_buf, types: [KASAN] # git bisect bad 3d392b2676bf3199863a1e5efb2c087ad9d442a4 Bisecting: 10 revisions left to test after this (roughly 4 steps) [11215630aada28307ba555a43138db6ac54fa825] ext4: don't BUG on inconsistent journal feature testing commit 11215630aada28307ba555a43138db6ac54fa825 gcc compiler: gcc (GCC) 8.4.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 365a137467031b2e74012030c252c15ecf574137f74e69fdcd79e5681b26ba12 all runs: crashed: KASAN: use-after-free Write in add_dirent_to_buf representative crash: KASAN: use-after-free Write in add_dirent_to_buf, types: [KASAN] # git bisect bad 11215630aada28307ba555a43138db6ac54fa825 Bisecting: 5 revisions left to test after this (roughly 3 steps) [5872331b3d91820e14716632ebb56b1399b34fe1] ext4: fix potential negative array index in do_split() testing commit 5872331b3d91820e14716632ebb56b1399b34fe1 gcc compiler: gcc (GCC) 8.4.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 48c276f37b08b63247b26542ec3ab453d4c537e620a9d568ac0bdcc4d763d14e run #0: crashed: KASAN: use-after-free Write in add_dirent_to_buf run #1: crashed: KASAN: use-after-free Write in add_dirent_to_buf run #2: crashed: KASAN: use-after-free Write in add_dirent_to_buf run #3: crashed: KASAN: use-after-free Write in add_dirent_to_buf run #4: crashed: KASAN: use-after-free Write in add_dirent_to_buf run #5: crashed: KASAN: use-after-free Write in add_dirent_to_buf run #6: crashed: KASAN: out-of-bounds Write in add_dirent_to_buf run #7: crashed: KASAN: use-after-free Write in add_dirent_to_buf run #8: crashed: KASAN: use-after-free Write in add_dirent_to_buf run #9: crashed: KASAN: use-after-free Write in add_dirent_to_buf representative crash: KASAN: use-after-free Write in add_dirent_to_buf, types: [KASAN] # git bisect bad 5872331b3d91820e14716632ebb56b1399b34fe1 Bisecting: 2 revisions left to test after this (roughly 1 step) [e0f49d270d9d04beec113aa7cfacac6bddcb5765] ext4: delete unnecessary checks before brelse() testing commit e0f49d270d9d04beec113aa7cfacac6bddcb5765 gcc compiler: gcc (GCC) 8.4.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 81a91ce23c648d6d40448dd0b7fecac20f146ca31cbc6cf91568006dafef7fc4 all runs: OK false negative chance: 0.000 # git bisect good e0f49d270d9d04beec113aa7cfacac6bddcb5765 Bisecting: 0 revisions left to test after this (roughly 1 step) [24dc9864914eb5813173cfa53313fcd02e4aea7d] jbd2: make sure jh have b_transaction set in refile/unfile_buffer testing commit 24dc9864914eb5813173cfa53313fcd02e4aea7d gcc compiler: gcc (GCC) 8.4.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 20f5aac54addd314dfc433ea57f1619fa76fd88b6b1dfd7f47112a6943f9f028 all runs: OK false negative chance: 0.000 # git bisect good 24dc9864914eb5813173cfa53313fcd02e4aea7d 5872331b3d91820e14716632ebb56b1399b34fe1 is the first bad commit commit 5872331b3d91820e14716632ebb56b1399b34fe1 Author: Eric Sandeen Date: Wed Jun 17 14:19:04 2020 -0500 ext4: fix potential negative array index in do_split() If for any reason a directory passed to do_split() does not have enough active entries to exceed half the size of the block, we can end up iterating over all "count" entries without finding a split point. In this case, count == move, and split will be zero, and we will attempt a negative index into map[]. Guard against this by detecting this case, and falling back to split-to-half-of-count instead; in this case we will still have plenty of space (> half blocksize) in each split block. Fixes: ef2b02d3e617 ("ext34: ensure do_split leaves enough free space in both blocks") Signed-off-by: Eric Sandeen Reviewed-by: Andreas Dilger Reviewed-by: Jan Kara Link: https://lore.kernel.org/r/f53e246b-647c-64bb-16ec-135383c70ad7@redhat.com Signed-off-by: Theodore Ts'o fs/ext4/namei.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) accumulated error probability: 0.00 culprit signature: 48c276f37b08b63247b26542ec3ab453d4c537e620a9d568ac0bdcc4d763d14e parent signature: 20f5aac54addd314dfc433ea57f1619fa76fd88b6b1dfd7f47112a6943f9f028 revisions tested: 34, total time: 6h49m32.5526742s (build: 3h27m11.289483156s, test: 3h8m30.603793548s) first bad commit: 5872331b3d91820e14716632ebb56b1399b34fe1 ext4: fix potential negative array index in do_split() recipients (to): ["adilger@dilger.ca" "jack@suse.cz" "sandeen@redhat.com" "tytso@mit.edu"] recipients (cc): [] crash: KASAN: use-after-free Write in add_dirent_to_buf EXT4-fs error (device loop3): ext4_xattr_inode_iget:389: comm syz.3.19: inode #1: comm syz.3.19: iget: illegal inode # EXT4-fs error (device loop3): ext4_xattr_inode_iget:394: comm syz.3.19: error while reading EA inode 1 err=-117 EXT4-fs (loop3): 1 orphan inode deleted EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue ================================================================== BUG: KASAN: use-after-free in add_dirent_to_buf+0x2a1/0x650 fs/ext4/namei.c:2025 Write of size 251 at addr ffff8881d4bddf14 by task syz.3.19/3236 CPU: 1 PID: 3236 Comm: syz.3.19 Not tainted 5.8.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x7c/0xb0 lib/dump_stack.c:118 print_address_description.constprop.8.cold.10+0x9/0x456 mm/kasan/report.c:383 __kasan_report mm/kasan/report.c:513 [inline] kasan_report.cold.11+0x1f/0x37 mm/kasan/report.c:530 check_memory_region_inline mm/kasan/generic.c:186 [inline] check_memory_region+0x1c1/0x1e0 mm/kasan/generic.c:192 memcpy+0x38/0x60 mm/kasan/common.c:106 add_dirent_to_buf+0x2a1/0x650 fs/ext4/namei.c:2025 make_indexed_dir+0x98d/0xc90 fs/ext4/namei.c:2153 ext4_add_entry+0x8f2/0xb50 fs/ext4/namei.c:2260 ext4_add_nondir+0x8a/0x220 fs/ext4/namei.c:2589 ext4_symlink+0x70d/0xca0 fs/ext4/namei.c:3382 vfs_symlink fs/namei.c:3953 [inline] vfs_symlink+0x2d6/0x4c0 fs/namei.c:3939 do_symlinkat+0x176/0x1b0 fs/namei.c:3980 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f857348d169 Code: Bad RIP value. RSP: 002b:00007f8572eff038 EFLAGS: 00000246 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 00007f85736a5fa0 RCX: 00007f857348d169 RDX: 0000000000000000 RSI: 0000400000000cc0 RDI: 0000400000000dc0 RBP: 00007f857350e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f85736a5fa0 R15: 00007ffc7f810ab8 The buggy address belongs to the page: page:ffffea000752f740 refcount:3 mapcount:0 mapping:000000007786cc22 index:0x3f mapping->a_ops:def_blk_aops flags: 0x10000000000202a(referenced|dirty|active|private) raw: 010000000000202a dead000000000100 dead000000000122 ffff8881ede26e20 raw: 000000000000003f ffff8881d81c8d98 00000003ffffffff ffff8881ddcdc000 page dumped because: kasan: bad access detected page->mem_cgroup:ffff8881ddcdc000 page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x108c48(GFP_NOFS|__GFP_NOFAIL|__GFP_HARDWALL|__GFP_MOVABLE) set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook mm/page_alloc.c:2218 [inline] prep_new_page+0x21e/0x320 mm/page_alloc.c:2224 get_page_from_freelist+0x110e/0x4610 mm/page_alloc.c:3794 __alloc_pages_nodemask+0x278/0x710 mm/page_alloc.c:4844 pagecache_get_page+0x15e/0x510 mm/filemap.c:1642 find_or_create_page include/linux/pagemap.h:348 [inline] grow_dev_page fs/buffer.c:975 [inline] grow_buffers fs/buffer.c:1044 [inline] __getblk_slow fs/buffer.c:1071 [inline] __getblk_gfp+0x1dd/0x800 fs/buffer.c:1355 sb_getblk include/linux/buffer_head.h:325 [inline] ext4_getblk+0x123/0x3b0 fs/ext4/inode.c:840 ext4_bread+0x5a/0x280 fs/ext4/inode.c:883 ext4_append+0x132/0x330 fs/ext4/namei.c:67 make_indexed_dir+0x265/0xc90 fs/ext4/namei.c:2096 ext4_add_entry+0x8f2/0xb50 fs/ext4/namei.c:2260 ext4_add_nondir+0x8a/0x220 fs/ext4/namei.c:2589 ext4_symlink+0x70d/0xca0 fs/ext4/namei.c:3382 vfs_symlink fs/namei.c:3953 [inline] vfs_symlink+0x2d6/0x4c0 fs/namei.c:3939 do_symlinkat+0x176/0x1b0 fs/namei.c:3980 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1213 [inline] free_pcp_prepare+0x3d8/0x4c0 mm/page_alloc.c:1248 free_unref_page_prepare mm/page_alloc.c:3098 [inline] free_unref_page_list+0xd4/0x4f0 mm/page_alloc.c:3167 release_pages+0x980/0x1200 mm/swap.c:911 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:242 [inline] tlb_flush_mmu+0xc1/0x540 mm/mmu_gather.c:249 tlb_finish_mmu+0x84/0x370 mm/mmu_gather.c:328 exit_mmap+0x26d/0x450 mm/mmap.c:3152 __mmput kernel/fork.c:1093 [inline] mmput+0xcd/0x3a0 kernel/fork.c:1114 exit_mm kernel/exit.c:482 [inline] do_exit+0x8c6/0x28e0 kernel/exit.c:792 do_group_exit+0xeb/0x2d0 kernel/exit.c:903 __do_sys_exit_group kernel/exit.c:914 [inline] __se_sys_exit_group kernel/exit.c:912 [inline] __x64_sys_exit_group+0x35/0x40 kernel/exit.c:912 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Memory state around the buggy address: ffff8881d4bddf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881d4bddf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8881d4bde000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff8881d4bde080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8881d4bde100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================