ci2 starts bisection 2023-09-16 06:41:56.383225428 +0000 UTC m=+253448.412399541 bisecting cause commit starting from e42bebf6db296d7fbfb3dd6782977d626e94031e building syzkaller on 0b6a67ac4b0dc26f43030c5edd01c9175f13b784 ensuring issue is reproducible on original commit e42bebf6db296d7fbfb3dd6782977d626e94031e testing commit e42bebf6db296d7fbfb3dd6782977d626e94031e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: db2cadecf67d6ae92a11d4dee00f6f14eee7354294326f2d7cb4c191945f9ec3 all runs: crashed: general protection fault in utf8nlookup representative crash: general protection fault in utf8nlookup, types: [UNKNOWN] check whether we can drop unnecessary instrumentation disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit e42bebf6db296d7fbfb3dd6782977d626e94031e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 613abe9354781b65a0dc9b3d3347177fa666a3038dab0941942d9a15b30a8bf1 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in utf8nlookup representative crash: BUG: unable to handle kernel NULL pointer dereference in utf8nlookup, types: [UNKNOWN] the bug reproduces without the instrumentation disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN LOCKDEP], they are not needed kconfig minimization: base=3876 full=7686 leaves diff=2019 split chunks (needed=false): <2019> split chunk #0 of len 2019 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 e42bebf6db296d7fbfb3dd6782977d626e94031e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a2e448f4000d42e20f80d384cd1cdb63c48bb3c35460fc6551f209f655ee330e all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in utf8nlookup representative crash: BUG: unable to handle kernel NULL pointer dereference in utf8nlookup, 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 e42bebf6db296d7fbfb3dd6782977d626e94031e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c682992727332d57384cbe33ce0d15ffa73d907bbb3fcc46b0e6b3062926ea57 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in utf8nlookup representative crash: BUG: unable to handle kernel NULL pointer dereference in utf8nlookup, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit e42bebf6db296d7fbfb3dd6782977d626e94031e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 630f01e5aee518d38ed0fbad257771785b3d5119ca3cae2a5540c7ca42dce6dc all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in utf8nlookup representative crash: BUG: unable to handle kernel NULL pointer dereference in utf8nlookup, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit e42bebf6db296d7fbfb3dd6782977d626e94031e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a73536229b455f6f75df5f22b7e8e689ded30b54bdc75308b5247611c300b783 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 e42bebf6db296d7fbfb3dd6782977d626e94031e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1e9c38b13f77f2770bb0eab6f9706d39e8ae290a7059de54c9022d979fb853a4 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in utf8nlookup representative crash: BUG: unable to handle kernel NULL pointer dereference in utf8nlookup, types: [UNKNOWN] the chunk can be dropped minimized to 404 configs; suspects: [AF_RXRPC ARCH_ENABLE_MEMORY_HOTREMOVE ATM AX25 CFG80211 CMA DAX DLM DVB_CORE ENCRYPTED_KEYS EXTCON GENEVE GPIOLIB HAMRADIO HAVE_CLK HID_SENSOR_HUB HID_SMARTJOYPLUS HID_THRUSTMASTER IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_IPOIB INFINIBAND_USER_ACCESS INFINIBAND_VIRT_DMA INPUT_TABLET INPUT_TOUCHSCREEN IP_SCTP L2TP LIBNVDIMM MEDIA_COMMON_OPTIONS MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_RETU MMC MTD MTD_UBI NETFILTER_CONNCOUNT NET_IPGRE NET_IPGRE_DEMUX NFS_V4_1 NF_NAT_TFTP NF_SOCKET_IPV4 NF_SOCKET_IPV6 NF_TABLES NF_TABLES_ARP NF_TPROXY_IPV4 NF_TPROXY_IPV6 NILFS2_FS NLMON NLS_CODEPAGE_1250 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 NOP_USB_XCEIV NOZOMI NTFS3_FS NTFS3_FS_POSIX_ACL NTFS3_LZX_XPRESS NTFS_FS NTFS_RW NULL_TTY NUMA_BALANCING NUMA_BALANCING_DEFAULT_ENABLED NUMA_EMU NUMA_KEEP_MEMINFO NVDIMM_DAX NVDIMM_KEYS NVDIMM_PFN 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_INDEX OVERLAY_FS_REDIRECT_ALWAYS_FOLLOW OVERLAY_FS_REDIRECT_DIR PACKET_DIAG PADATA PAGE_IDLE_FLAG PAGE_POOL PAGE_REPORTING PAHOLE_HAS_BTF_TAG 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 PM_CLK PNFS_BLOCK PNFS_FILE_LAYOUT PNFS_FLEXFILE_LAYOUT PPP PPPOATM PPPOE PPPOE_HASH_BITS_4 PPPOL2TP PPP_ASYNC PPP_BSDCOMP PPP_DEFLATE PPP_FILTER PPP_MPPE PPP_MULTILINK PPP_SYNC_TTY PPTP PREEMPT PREEMPT_NOTIFIERS PRISM2_USB PROC_CHILDREN PSI PSTORE PSTORE_COMPRESS QCOM_QMI_HELPERS QNX4FS_FS QNX6FS_FS QRTR QRTR_TUN R8712U RADIO_ADAPTERS RADIO_SHARK RADIO_SHARK2 RADIO_TEA575X RAID6_PQ RAID_ATTRS RC_ATI_REMOTE RC_CORE RC_DEVICES 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 REGULATOR REGULATOR_TWL4030 REISERFS_FS REISERFS_FS_POSIX_ACL REISERFS_FS_SECURITY REISERFS_FS_XATTR REISERFS_PROC_INFO RESET_CONTROLLER RFKILL RFKILL_INPUT RFKILL_LEDS RMI4_2D_SENSOR RMI4_CORE RMI4_F03 RMI4_F03_SERIO RMI4_F11 RMI4_F12 RMI4_F30 ROMFS_BACKED_BY_BOTH ROMFS_FS ROMFS_ON_BLOCK ROMFS_ON_MTD ROSE RTC_DRV_HID_SENSOR_TIME RXKAD SCHED_CORE 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 SECURITY_SMACK_NETFILTER SERIAL_DEV_BUS SERIAL_DEV_CTRL_TTYPORT SERIAL_MCTRL_GPIO SGI_PARTITION SIGNATURE SIGNED_PE_FILE_VERIFICATION SLHC SLIP SLIP_COMPRESSED SLIP_MODE_SLIP6 SLIP_SMART SMARTJOYPLUS_FF SMBFS SMC SMC_DIAG SMSC_PHY 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_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_SUPPORT_OLD_API SND_TIMER SND_USB SND_USB_6FIRE SND_USB_AUDIO 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 SOUND_OSS_CORE SOUND_OSS_CORE_PRECLAIM SPI SPI_DLN2 SPI_DYNAMIC SPI_MASTER SQUASHFS SQUASHFS_4K_DEVBLK_SIZE SQUASHFS_COMPILE_DECOMP_SINGLE SQUASHFS_DECOMP_SINGLE 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 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 TASKS_TRACE_RCU 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 TEXTSEARCH TEXTSEARCH_BM TEXTSEARCH_FSM TEXTSEARCH_KMP THERMAL_NETLINK THP_SWAP THRUSTMASTER_FF TIPC TIPC_CRYPTO TIPC_DIAG TIPC_MEDIA_IB TIPC_MEDIA_UDP TLS TLS_TOE 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_FUSB302 TYPEC_TCPCI TYPEC_TCPM TYPEC_TPS6598X TYPEC_UCSI 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 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_CHAOSKEY USB_CHIPIDEA USB_CHIPIDEA_HOST USB_CHIPIDEA_PCI USB_CHIPIDEA_UDC USB_CONFIGFS USB_CONFIGFS_ACM USB_CONFIGFS_ECM USB_CONFIGFS_ECM_SUBSET USB_CONFIGFS_EEM USB_CONFIGFS_F_FS USB_CONFIGFS_F_HID USB_DWC2 USB_GADGET USB_MUSB_HDRC USB_NET_CDC_SUBSET USB_ROLE_SWITCH USB_STORAGE_REALTEK USB_ULPI_BUS USB_USBNET VIDEO_DEV VXLAN WIRELESS WLAN ZONE_DEVICE] disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed picked [v6.5 v6.4 v6.3 v6.1 v5.19 v5.17 v5.15 v5.13 v5.10 v5.7 v5.4 v5.1 v4.19] out of 28 release tags 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: 10e1d3a79d1a776bf9abb7a491b817318dc2529bab80e98660411480271c92dc all runs: OK false negative chance: 0.000 # git bisect start e42bebf6db296d7fbfb3dd6782977d626e94031e 2dde18cd1d8fac735875f2e4987f11817cc0bc2c Bisecting: 6909 revisions left to test after this (roughly 13 steps) [461f35f014466c4e26dca6be0f431f57297df3f2] Merge tag 'drm-next-2023-08-30' of git://anongit.freedesktop.org/drm/drm testing commit 461f35f014466c4e26dca6be0f431f57297df3f2 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 06b393e4cca06c4636dca65d38291e2084cda8ff651e3b68c8115f4e4b3f9f4d all runs: OK false negative chance: 0.000 # git bisect good 461f35f014466c4e26dca6be0f431f57297df3f2 Bisecting: 3406 revisions left to test after this (roughly 12 steps) [8e1e49550dc85694abd04d86a8ee36bc98bd8b9e] Merge tag 'tty-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty testing commit 8e1e49550dc85694abd04d86a8ee36bc98bd8b9e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1a71d2ed333c13eb34a12057ae7c6655df657032fefc22f9482713d88c51ce7b all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in utf8nlookup representative crash: BUG: unable to handle kernel NULL pointer dereference in utf8nlookup, types: [UNKNOWN] # git bisect bad 8e1e49550dc85694abd04d86a8ee36bc98bd8b9e Bisecting: 1695 revisions left to test after this (roughly 11 steps) [0e72db77672ff4758a31fb5259c754a7bb229751] Merge tag 'soc-dt-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc testing commit 0e72db77672ff4758a31fb5259c754a7bb229751 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2349f191e5e72db6682ca0977cd9593409e96c2b0fbd0f18eec0efd05191ebbc all runs: OK false negative chance: 0.000 # git bisect good 0e72db77672ff4758a31fb5259c754a7bb229751 Bisecting: 798 revisions left to test after this (roughly 10 steps) [4ad0a4c2343d3981e92df2b39fa262be62a9091a] Merge tag 'powerpc-6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux testing commit 4ad0a4c2343d3981e92df2b39fa262be62a9091a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9e41c63f0afa33fba1636a6b9d7d00b323b82b2e94a2b7be8c3aeb8015a6f044 all runs: OK false negative chance: 0.000 # git bisect good 4ad0a4c2343d3981e92df2b39fa262be62a9091a Bisecting: 433 revisions left to test after this (roughly 9 steps) [e2c874f999f079e3ec9b8071e92c87d57aded3b6] Merge tag 'platform-drivers-x86-v6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86 testing commit e2c874f999f079e3ec9b8071e92c87d57aded3b6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5e495f1ba2270593e65b6cd4c6340998b52e04bce14734e91109edf7cdd1e5d1 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in utf8nlookup representative crash: BUG: unable to handle kernel NULL pointer dereference in utf8nlookup, types: [UNKNOWN] # git bisect bad e2c874f999f079e3ec9b8071e92c87d57aded3b6 Bisecting: 191 revisions left to test after this (roughly 8 steps) [f35d1706159e015848ec7421e91b44b614c02dc2] Merge tag 'nfsd-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux testing commit f35d1706159e015848ec7421e91b44b614c02dc2 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c0d1079203cdec41bff912d4f579ae9c2500278e73986000366438b8a7dbb383 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in utf8nlookup representative crash: BUG: unable to handle kernel NULL pointer dereference in utf8nlookup, types: [UNKNOWN] # git bisect bad f35d1706159e015848ec7421e91b44b614c02dc2 Bisecting: 73 revisions left to test after this (roughly 7 steps) [3ef96fcfd50b9980470efb1acec7c27a60b98e87] Merge tag 'ext4_for_linus-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 testing commit 3ef96fcfd50b9980470efb1acec7c27a60b98e87 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9ac5de46a81c8ad9db02eee13f151e2e4662050ab5e783f1270fcef7c19148c5 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in utf8nlookup representative crash: BUG: unable to handle kernel NULL pointer dereference in utf8nlookup, types: [UNKNOWN] # git bisect bad 3ef96fcfd50b9980470efb1acec7c27a60b98e87 Bisecting: 49 revisions left to test after this (roughly 6 steps) [a50bda147421e24c1a5d47ddcc0675360b7cb3ac] ext4: mballoc: avoid garbage value from err testing commit a50bda147421e24c1a5d47ddcc0675360b7cb3ac gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 811455b92e04bf5e627da7f01d250cb81f26a55e379d05bf6ea6b66b23c2e252 all runs: OK false negative chance: 0.000 # git bisect good a50bda147421e24c1a5d47ddcc0675360b7cb3ac Bisecting: 29 revisions left to test after this (roughly 5 steps) [e7e9423db459423d3dcb367217553ad9ededadc9] Merge tag 'v6.6-vfs.super.fixes.2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs testing commit e7e9423db459423d3dcb367217553ad9ededadc9 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e1d463200962866c3916a99efa13f7430c42d5ba8287117e757612a2772db0e1 all runs: OK false negative chance: 0.000 # git bisect good e7e9423db459423d3dcb367217553ad9ededadc9 Bisecting: 14 revisions left to test after this (roughly 4 steps) [63e711b081609748d631fc3a08b14ba01c8e4f16] fs: dlm: create midcomms nodes when configure testing commit 63e711b081609748d631fc3a08b14ba01c8e4f16 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 05b5672fc6057c2b7cf79f3cb3e4380a05dae32ffa6989b8af71856b3ad6dfdd all runs: OK false negative chance: 0.000 # git bisect good 63e711b081609748d631fc3a08b14ba01c8e4f16 Bisecting: 7 revisions left to test after this (roughly 3 steps) [0f6bc57971c63f7352c3564d19a5dc707fe8332a] ext4: use LIST_HEAD() to initialize the list_head in mballoc.c testing commit 0f6bc57971c63f7352c3564d19a5dc707fe8332a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 624cd9892208f2e22400f037d4e8017ef2386823e355d3fee2451ab487132c69 all runs: OK false negative chance: 0.000 # git bisect good 0f6bc57971c63f7352c3564d19a5dc707fe8332a Bisecting: 3 revisions left to test after this (roughly 2 steps) [768d612f79822d30a1e7d132a4d4b05337ce42ec] ext4: fix slab-use-after-free in ext4_es_insert_extent() testing commit 768d612f79822d30a1e7d132a4d4b05337ce42ec gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4d34ec96a2feb826a2adf80e5c2bbb755e8ace253169a7c7c4e1ae14ef9ffa07 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in utf8nlookup representative crash: BUG: unable to handle kernel NULL pointer dereference in utf8nlookup, types: [UNKNOWN] # git bisect bad 768d612f79822d30a1e7d132a4d4b05337ce42ec Bisecting: 1 revision left to test after this (roughly 1 step) [b81427939590450172716093dafdda8ef52e020f] ext4: remove redundant checks of s_encoding testing commit b81427939590450172716093dafdda8ef52e020f gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a6cbc6878b6d5c8da20b6ee1e590a9797271bb2e7112c08bdf369a374c76a3b2 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in utf8nlookup representative crash: BUG: unable to handle kernel NULL pointer dereference in utf8nlookup, types: [UNKNOWN] # git bisect bad b81427939590450172716093dafdda8ef52e020f Bisecting: 0 revisions left to test after this (roughly 0 steps) [8216776ccff6fcd40e3fdaa109aa4150ebe760b3] ext4: reject casefold inode flag without casefold feature testing commit 8216776ccff6fcd40e3fdaa109aa4150ebe760b3 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7884c5d3f4c4b6cbf74a899fef930adfac46ad06519b8fb379f85a0eab1d5737 all runs: OK false negative chance: 0.000 # git bisect good 8216776ccff6fcd40e3fdaa109aa4150ebe760b3 b81427939590450172716093dafdda8ef52e020f is the first bad commit commit b81427939590450172716093dafdda8ef52e020f Author: Eric Biggers Date: Mon Aug 14 11:29:02 2023 -0700 ext4: remove redundant checks of s_encoding Now that ext4 does not allow inodes with the casefold flag to be instantiated when unsupported, it's unnecessary to repeatedly check for support later on during random filesystem operations. Signed-off-by: Eric Biggers Link: https://lore.kernel.org/r/20230814182903.37267-3-ebiggers@kernel.org Signed-off-by: Theodore Ts'o fs/ext4/hash.c | 2 +- fs/ext4/namei.c | 6 +++--- 2 files changed, 4 insertions(+), 4 deletions(-) accumulated error probability: 0.00 culprit signature: a6cbc6878b6d5c8da20b6ee1e590a9797271bb2e7112c08bdf369a374c76a3b2 parent signature: 7884c5d3f4c4b6cbf74a899fef930adfac46ad06519b8fb379f85a0eab1d5737 revisions tested: 22, total time: 3h33m56.360297791s (build: 1h19m49.900177993s, test: 2h2m6.429809396s) first bad commit: b81427939590450172716093dafdda8ef52e020f ext4: remove redundant checks of s_encoding recipients (to): ["ebiggers@google.com" "tytso@mit.edu"] recipients (cc): [] crash: BUG: unable to handle kernel NULL pointer dereference in utf8nlookup EXT4-fs error (device loop0): ext4_do_update_inode:5097: inode #2: comm syz-executor.0: corrupted inode contents EXT4-fs error (device loop0): __ext4_ext_dirty:202: inode #2: comm syz-executor.0: mark_inode_dirty error BUG: kernel NULL pointer dereference, address: 0000000000000018 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 113079067 P4D 113079067 PUD 1130f5067 PMD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 0 PID: 2636 Comm: syz-executor.0 Not tainted 6.5.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 RIP: 0010:utf8nlookup+0xb/0x1e0 fs/unicode/utf8-norm.c:306 Code: 3b 44 24 10 75 12 4c 89 f0 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 f2 12 f6 00 66 90 55 53 4d 85 c0 0f 84 d9 00 00 00 <48> 8b 5f 18 89 f0 48 8b 44 c7 08 8b 40 04 48 03 43 30 eb 0f 4c 63 RSP: 0018:ffffc90002a83cc8 EFLAGS: 00010206 RAX: 0000000000000040 RBX: ffffc90002a83d10 RCX: ffff88810bc7e2e0 RDX: ffffc90002a83d4c RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: ffff88810f50d400 R11: 0000000000000000 R12: ffffc90002a83d10 R13: 0000000000000002 R14: ffffc90002a83d4c R15: ffffc90002a83d30 FS: 00007fa68c5656c0(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000018 CR3: 00000001130cb000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: utf8byte+0xa9/0x2d0 utf8_casefold+0xab/0xf0 fs/unicode/utf8-core.c:109 ext4_fname_setup_ci_filename+0x60/0xe0 fs/ext4/namei.c:1458 ext4_fname_setup_filename fs/ext4/ext4.h:2755 [inline] ext4_fname_prepare_lookup fs/ext4/ext4.h:2765 [inline] ext4_lookup_entry fs/ext4/namei.c:1760 [inline] ext4_lookup+0x96/0x260 fs/ext4/namei.c:1835 lookup_one_qstr_excl+0x91/0xd0 fs/namei.c:1605 filename_create+0xd9/0x1a0 fs/namei.c:3887 do_mkdirat+0xd0/0x1a0 fs/namei.c:4132 __do_sys_mkdirat fs/namei.c:4155 [inline] __se_sys_mkdirat fs/namei.c:4153 [inline] __x64_sys_mkdirat+0x29/0x30 fs/namei.c:4153 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fa68b87b5e7 Code: 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa68c564ee8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 0000000020000300 RCX: 00007fa68b87b5e7 RDX: 00000000000001ff RSI: 0000000020000540 RDI: 00000000ffffff9c RBP: 00000000200000c0 R08: 00000000000000fd R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000020000540 R13: 00007fa68c564f40 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: CR2: 0000000000000018 ---[ end trace 0000000000000000 ]--- RIP: 0010:utf8nlookup+0xb/0x1e0 fs/unicode/utf8-norm.c:306 Code: 3b 44 24 10 75 12 4c 89 f0 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 f2 12 f6 00 66 90 55 53 4d 85 c0 0f 84 d9 00 00 00 <48> 8b 5f 18 89 f0 48 8b 44 c7 08 8b 40 04 48 03 43 30 eb 0f 4c 63 RSP: 0018:ffffc90002a83cc8 EFLAGS: 00010206 RAX: 0000000000000040 RBX: ffffc90002a83d10 RCX: ffff88810bc7e2e0 RDX: ffffc90002a83d4c RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: ffff88810f50d400 R11: 0000000000000000 R12: ffffc90002a83d10 R13: 0000000000000002 R14: ffffc90002a83d4c R15: ffffc90002a83d30 FS: 00007fa68c5656c0(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000018 CR3: 00000001130cb000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 3b 44 24 10 cmp 0x10(%rsp),%eax 4: 75 12 jne 0x18 6: 4c 89 f0 mov %r14,%rax 9: 48 83 c4 18 add $0x18,%rsp d: 5b pop %rbx e: 41 5c pop %r12 10: 41 5d pop %r13 12: 41 5e pop %r14 14: 41 5f pop %r15 16: 5d pop %rbp 17: c3 ret 18: e8 f2 12 f6 00 call 0xf6130f 1d: 66 90 xchg %ax,%ax 1f: 55 push %rbp 20: 53 push %rbx 21: 4d 85 c0 test %r8,%r8 24: 0f 84 d9 00 00 00 je 0x103 * 2a: 48 8b 5f 18 mov 0x18(%rdi),%rbx <-- trapping instruction 2e: 89 f0 mov %esi,%eax 30: 48 8b 44 c7 08 mov 0x8(%rdi,%rax,8),%rax 35: 8b 40 04 mov 0x4(%rax),%eax 38: 48 03 43 30 add 0x30(%rbx),%rax 3c: eb 0f jmp 0x4d 3e: 4c rex.WR 3f: 63 .byte 0x63