ci starts bisection 2023-07-14 01:48:38.340903579 +0000 UTC m=+28569.997097784 bisecting cause commit starting from e3262265625831348cfb3128d35907ead75d8bf7 building syzkaller on 860811962461dbc8d8fb3af4fd7f65cf50857661 ensuring issue is reproducible on original commit e3262265625831348cfb3128d35907ead75d8bf7 testing commit e3262265625831348cfb3128d35907ead75d8bf7 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 14368d845feb34f4726ecae0c1de01e93b475314f37a2df895c8c4a6f22e2b45 run #0: crashed: general protection fault in __fput run #1: crashed: general protection fault in __fput run #2: crashed: KASAN: slab-use-after-free Read in madvise_collapse run #3: crashed: KASAN: slab-use-after-free Read in madvise_collapse run #4: crashed: kernel BUG in collapse_file run #5: crashed: kernel BUG in collapse_file run #6: crashed: general protection fault in __fput run #7: crashed: general protection fault in __fput run #8: crashed: kernel BUG in collapse_file run #9: crashed: kernel BUG in collapse_file run #10: crashed: general protection fault in __fput run #11: crashed: general protection fault in __fput run #12: crashed: general protection fault in __fput run #13: crashed: general protection fault in __fput run #14: crashed: general protection fault in __fput run #15: crashed: general protection fault in __fput run #16: crashed: general protection fault in __fput run #17: crashed: general protection fault in __fput run #18: crashed: general protection fault in __fput run #19: crashed: general protection fault in __fput run #20: crashed: general protection fault in __fput run #21: crashed: general protection fault in __fput run #22: crashed: general protection fault in __fput run #23: crashed: general protection fault in __fput run #24: crashed: general protection fault in __fput run #25: crashed: general protection fault in __fput run #26: crashed: kernel BUG in collapse_file run #27: crashed: kernel BUG in collapse_file run #28: crashed: general protection fault in __fput run #29: crashed: general protection fault in __fput run #30: crashed: general protection fault in __fput run #31: crashed: general protection fault in __fput run #32: crashed: general protection fault in __fput run #33: crashed: general protection fault in __fput run #34: crashed: kernel BUG in collapse_file run #35: crashed: kernel BUG in collapse_file run #36: crashed: general protection fault in __fput run #37: crashed: general protection fault in __fput run #38: crashed: general protection fault in __fput run #39: crashed: general protection fault in __fput representative crash: general protection fault in __fput, types: [UNKNOWN] check whether we can drop unnecessary instrumentation disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit e3262265625831348cfb3128d35907ead75d8bf7 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c2c454060b93e7445df0e41328508eb96150eb93e7076c3ce5aae52b77199364 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run representative crash: BUG: unable to handle kernel NULL pointer dereference in task_work_run, types: [UNKNOWN] the bug reproduces without the instrumentation disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed kconfig minimization: base=3883 full=7666 leaves diff=2006 split chunks (needed=false): <2006> split chunk #0 of len 2006 into 5 parts testing without sub-chunk 1/5 testing commit e3262265625831348cfb3128d35907ead75d8bf7 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e0e1b75d3e0de109ab15ea9a9232e7e35af745eee27421d9c96c9bd31b96386b run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #1: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #2: crashed: invalid opcode in collapse_file run #3: crashed: invalid opcode in collapse_file run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #6: crashed: invalid opcode in __put_cred run #7: crashed: invalid opcode in __put_cred run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #9: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #10: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #11: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #12: crashed: invalid opcode in collapse_file run #13: crashed: invalid opcode in collapse_file run #14: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #15: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #16: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #17: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #18: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #19: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run representative crash: BUG: unable to handle kernel NULL pointer dereference in task_work_run, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 2/5 testing commit e3262265625831348cfb3128d35907ead75d8bf7 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 378273fbd9d6f176b7444d34133a31e5e1209a343eecb5c5d1dfd1bf389d693c run #0: crashed: invalid opcode in collapse_file run #1: crashed: invalid opcode in collapse_file run #2: crashed: invalid opcode in collapse_file run #3: crashed: invalid opcode in collapse_file run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #9: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #10: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #11: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #12: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #13: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #14: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #15: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #16: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #17: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #18: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #19: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run representative crash: invalid opcode in collapse_file, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 3/5 testing commit e3262265625831348cfb3128d35907ead75d8bf7 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d648980b3ea111786fe49095f741e7b171d6943f8e375bfb59b99f680304d3ec run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #1: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #2: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #9: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #10: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #11: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #12: crashed: invalid opcode in collapse_file run #13: crashed: invalid opcode in collapse_file run #14: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #15: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #16: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #17: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #18: OK representative crash: BUG: unable to handle kernel NULL pointer dereference in task_work_run, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 4/5 testing commit e3262265625831348cfb3128d35907ead75d8bf7 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1e9c11d6bfef757b4ca9bd9c148667367be0981bd0f48dc1cfd6e590adfb9586 all runs: OK testing without sub-chunk 5/5 testing commit e3262265625831348cfb3128d35907ead75d8bf7 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3f2985cef9d88b26c48341881e06a936a8e3c9def9445c9f67a535ba504382a8 run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #1: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #2: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #9: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #10: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #11: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #12: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #13: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #14: OK run #15: OK run #16: OK representative crash: BUG: unable to handle kernel NULL pointer dereference in task_work_run, types: [UNKNOWN] the chunk can be dropped minimized to 402 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_ADVANCED NETFILTER_CONNCOUNT NET_IPGRE NET_IPGRE_DEMUX NFS_V4_1 NF_CONNTRACK_SNMP NF_NAT_SNMP_BASIC 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 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_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_842_COMPRESS PSTORE_COMPRESS PSTORE_DEFLATE_COMPRESS PSTORE_DEFLATE_COMPRESS_DEFAULT PSTORE_LZ4HC_COMPRESS PSTORE_LZ4_COMPRESS PSTORE_LZO_COMPRESS PSTORE_ZSTD_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 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 testing release v6.4 testing commit 6995e2de6891c724bfeb2db33d7b87775f913ad1 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 438ec08b0241309dcd0816c3ab447216dd050e0f2eac88fe0668ea348ae98705 all runs: OK # git bisect start e3262265625831348cfb3128d35907ead75d8bf7 6995e2de6891c724bfeb2db33d7b87775f913ad1 Bisecting: 7551 revisions left to test after this (roughly 13 steps) [b775d6c5859affe00527cbe74263de05cfe6b9f9] Merge tag 'mips_6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux testing commit b775d6c5859affe00527cbe74263de05cfe6b9f9 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3292c7579146edb8148b163545276e42f2c9251e535055513b1aecd42d9a5c4e all runs: OK # git bisect good b775d6c5859affe00527cbe74263de05cfe6b9f9 Bisecting: 3692 revisions left to test after this (roughly 12 steps) [e8069f5a8e3bdb5fdeeff895780529388592ee7a] Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm testing commit e8069f5a8e3bdb5fdeeff895780529388592ee7a gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a9167569d1a447b980d183db6eec2987bb0ce1ac325e9da5529f7cf67514e16e all runs: OK # git bisect good e8069f5a8e3bdb5fdeeff895780529388592ee7a Bisecting: 1844 revisions left to test after this (roughly 11 steps) [c1b3d9444c43b5ec83dd387e2b2b70ad060049a9] Merge branch 'at91-next' of git://git.kernel.org/pub/scm/linux/kernel/git/at91/linux.git testing commit c1b3d9444c43b5ec83dd387e2b2b70ad060049a9 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 0f161dbef890d0ea08b385ef2060e796c36d4655cc9e741d84b9ab46207437ff run #0: crashed: invalid opcode in collapse_file run #1: crashed: invalid opcode in collapse_file run #2: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #9: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #10: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #11: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #12: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #13: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #14: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #15: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #16: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #17: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #18: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #19: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run representative crash: invalid opcode in collapse_file, types: [UNKNOWN] # git bisect bad c1b3d9444c43b5ec83dd387e2b2b70ad060049a9 Bisecting: 936 revisions left to test after this (roughly 10 steps) [c91e587be8e2680786cbf0b87fa7ae92c345857f] Merge tag 'linux-watchdog-6.5-rc1' of git://www.linux-watchdog.org/linux-watchdog testing commit c91e587be8e2680786cbf0b87fa7ae92c345857f gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d367921b8ab57db7536bf22a475ad60d10b29a065abb2fc45fb0d0a0d78c8ad8 all runs: OK # git bisect good c91e587be8e2680786cbf0b87fa7ae92c345857f Bisecting: 468 revisions left to test after this (roughly 9 steps) [280188b7fbe21af81f9046b1615f5eaf7a9e162d] fs/buffer: clean up block_commit_write testing commit 280188b7fbe21af81f9046b1615f5eaf7a9e162d gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 08c13c4c32045107621a681c47b653f2ead6f9df8b8cea5bed7786d60de62436 all runs: OK # git bisect good 280188b7fbe21af81f9046b1615f5eaf7a9e162d Bisecting: 232 revisions left to test after this (roughly 8 steps) [f6302631c2d494331c00f60b75d409845f2cb0f5] Merge branch 'for-linux-next-fixes' of git://anongit.freedesktop.org/drm-intel testing commit f6302631c2d494331c00f60b75d409845f2cb0f5 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8e7926d33649fc301122de853fd00b9272e65425b462b421c6c5c4560d00ea05 all runs: OK # git bisect good f6302631c2d494331c00f60b75d409845f2cb0f5 Bisecting: 116 revisions left to test after this (roughly 7 steps) [b90a25d4bc0292124e5b9a007c7a7a8a8d58e55c] selinux-use-vma_is_stack-and-vma_is_heap-fix testing commit b90a25d4bc0292124e5b9a007c7a7a8a8d58e55c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d699b19ba637bf6c0606e82dd1f5e9b70a5d3316ab874d0817f7139ecce8db3f run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #1: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #2: crashed: invalid opcode in collapse_file run #3: crashed: invalid opcode in collapse_file run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #9: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #10: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #11: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #12: OK run #13: OK run #14: OK run #15: OK representative crash: BUG: unable to handle kernel NULL pointer dereference in task_work_run, types: [UNKNOWN] # git bisect bad b90a25d4bc0292124e5b9a007c7a7a8a8d58e55c Bisecting: 57 revisions left to test after this (roughly 6 steps) [1e0e11765bf3478e43d0e379e59b008c3d4a25b1] mm: hugetlb_vmemmap: fix a race between vmemmap pmd split testing commit 1e0e11765bf3478e43d0e379e59b008c3d4a25b1 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6bbee915779e08245cebfbada21971bca7323e141a67435a942bfbac8c0894f1 all runs: OK # git bisect good 1e0e11765bf3478e43d0e379e59b008c3d4a25b1 Bisecting: 28 revisions left to test after this (roughly 5 steps) [b862ed8a8d478e9121f47d8ef17e5a959046e8bc] mm: memory-failure: minor cleanup for comments and codestyle testing commit b862ed8a8d478e9121f47d8ef17e5a959046e8bc gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fa6be81d7cbbaece853d00a463729d7232aa11308def94fe5a366eb6f3199d26 all runs: OK # git bisect good b862ed8a8d478e9121f47d8ef17e5a959046e8bc Bisecting: 14 revisions left to test after this (roughly 4 steps) [7f37e74d82ffaee5081f9a006463b99b68410680] powerpc: assert_pte_locked() use pte_offset_map_nolock() testing commit 7f37e74d82ffaee5081f9a006463b99b68410680 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 94117fcc2c63b89eca4ae5287c186ae8b7a3192b84f779526ad65f3967a5af42 all runs: OK # git bisect good 7f37e74d82ffaee5081f9a006463b99b68410680 Bisecting: 7 revisions left to test after this (roughly 3 steps) [f14f7aaf529c68d5c5a26d39995c9e9aa15b5628] mm/khugepaged: delete khugepaged_collapse_pte_mapped_thps() testing commit f14f7aaf529c68d5c5a26d39995c9e9aa15b5628 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4784feeca6dd2b1851fa4a9139def2042e3f22b8212fedd151e8770350d7710b run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #1: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #2: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #9: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #10: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #11: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #12: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #13: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #14: crashed: invalid opcode in collapse_file run #15: crashed: invalid opcode in collapse_file run #16: OK run #17: OK representative crash: BUG: unable to handle kernel NULL pointer dereference in task_work_run, types: [UNKNOWN] # git bisect bad f14f7aaf529c68d5c5a26d39995c9e9aa15b5628 Bisecting: 3 revisions left to test after this (roughly 2 steps) [ef78f98ce3ab2e79435475d4a66f081d9db75499] s390: add pte_free_defer() for pgtables sharing page testing commit ef78f98ce3ab2e79435475d4a66f081d9db75499 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7fa97312db84163e95a5b877d942e44ac779d70b627f40649f5e10595d5336fb all runs: OK # git bisect good ef78f98ce3ab2e79435475d4a66f081d9db75499 Bisecting: 1 revision left to test after this (roughly 1 step) [251ecd321ff5f8674485301bcc33f7093bf7a560] mm/khugepaged: retract_page_tables() without mmap or vma lock testing commit 251ecd321ff5f8674485301bcc33f7093bf7a560 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e09a2feef202d0c6aa6fb458c2d1fc48ad51635a1be6f8b61e0ac2f98b8fe543 all runs: OK # git bisect good 251ecd321ff5f8674485301bcc33f7093bf7a560 Bisecting: 0 revisions left to test after this (roughly 0 steps) [49a44d59344d1a6a4cc841d6e4a8727f99ed97bf] mm/khugepaged: collapse_pte_mapped_thp() with mmap_read_lock() testing commit 49a44d59344d1a6a4cc841d6e4a8727f99ed97bf gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 25f2e98c1c9555090269613732aeb0a59f1c8a917b8c31df6771ac87864f50d2 run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #1: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #2: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #9: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #10: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #11: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #12: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #13: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #14: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #15: crashed: BUG: unable to handle kernel NULL pointer dereference in task_work_run run #16: OK run #17: OK representative crash: BUG: unable to handle kernel NULL pointer dereference in task_work_run, types: [UNKNOWN] # git bisect bad 49a44d59344d1a6a4cc841d6e4a8727f99ed97bf 49a44d59344d1a6a4cc841d6e4a8727f99ed97bf is the first bad commit commit 49a44d59344d1a6a4cc841d6e4a8727f99ed97bf Author: Hugh Dickins Date: Tue Jul 11 21:42:19 2023 -0700 mm/khugepaged: collapse_pte_mapped_thp() with mmap_read_lock() Bring collapse_and_free_pmd() back into collapse_pte_mapped_thp(). It does need mmap_read_lock(), but it does not need mmap_write_lock(), nor vma_start_write() nor i_mmap lock nor anon_vma lock. All racing paths are relying on pte_offset_map_lock() and pmd_lock(), so use those. Follow the pattern in retract_page_tables(); and using pte_free_defer() removes most of the need for tlb_remove_table_sync_one() here; but call pmdp_get_lockless_sync() to use it in the PAE case. First check the VMA, in case page tables are being torn down: from JannH. Confirm the preliminary find_pmd_or_thp_or_none() once page lock has been acquired and the page looks suitable: from then on its state is stable. However, collapse_pte_mapped_thp() was doing something others don't: freeing a page table still containing "valid" entries. i_mmap lock did stop a racing truncate from double-freeing those pages, but we prefer collapse_pte_mapped_thp() to clear the entries as usual. Their TLB flush can wait until the pmdp_collapse_flush() which follows, but the mmu_notifier_invalidate_range_start() has to be done earlier. Do the "step 1" checking loop without mmu_notifier: it wouldn't be good for khugepaged to keep on repeatedly invalidating a range which is then found unsuitable e.g. contains COWs. "step 2", which does the clearing, must then be more careful (after dropping ptl to do mmu_notifier), with abort prepared to correct the accounting like "step 3". But with those entries now cleared, "step 4" (after dropping ptl to do pmd_lock) is kept safe by the huge page lock, which stops new PTEs from being faulted in. Link: https://lkml.kernel.org/r/b53be6a4-7715-51f9-aad-f1347dcb7c4@google.com Signed-off-by: Hugh Dickins Cc: Alexander Gordeev Cc: Alistair Popple Cc: Aneesh Kumar K.V Cc: Anshuman Khandual Cc: Axel Rasmussen Cc: Christian Borntraeger Cc: Christophe Leroy Cc: Christoph Hellwig Cc: Claudio Imbrenda Cc: David Hildenbrand Cc: "David S. Miller" Cc: Gerald Schaefer Cc: Heiko Carstens Cc: Huang, Ying Cc: Ira Weiny Cc: Jann Horn Cc: Jason Gunthorpe Cc: Kirill A. Shutemov Cc: Lorenzo Stoakes Cc: Matthew Wilcox (Oracle) Cc: Mel Gorman Cc: Miaohe Lin Cc: Michael Ellerman Cc: Mike Kravetz Cc: Mike Rapoport (IBM) Cc: Minchan Kim Cc: Naoya Horiguchi Cc: Pavel Tatashin Cc: Peter Xu Cc: Peter Zijlstra Cc: Qi Zheng Cc: Ralph Campbell Cc: Russell King Cc: SeongJae Park Cc: Song Liu Cc: Steven Price Cc: Suren Baghdasaryan Cc: Thomas Hellström Cc: Vasily Gorbik Cc: Vishal Moola (Oracle) Cc: Vlastimil Babka Cc: Will Deacon Cc: Yang Shi Cc: Yu Zhao Cc: Zack Rusin Cc: Zi Yan Signed-off-by: Andrew Morton mm/khugepaged.c | 170 +++++++++++++++++++++++++------------------------------- 1 file changed, 76 insertions(+), 94 deletions(-) culprit signature: 25f2e98c1c9555090269613732aeb0a59f1c8a917b8c31df6771ac87864f50d2 parent signature: e09a2feef202d0c6aa6fb458c2d1fc48ad51635a1be6f8b61e0ac2f98b8fe543 revisions tested: 22, total time: 5h2m50.898827673s (build: 1h31m44.381357856s, test: 3h26m3.31361077s) first bad commit: 49a44d59344d1a6a4cc841d6e4a8727f99ed97bf mm/khugepaged: collapse_pte_mapped_thp() with mmap_read_lock() recipients (to): ["akpm@linux-foundation.org" "hughd@google.com"] recipients (cc): [] crash: BUG: unable to handle kernel NULL pointer dereference in task_work_run BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 102f50067 P4D 102f50067 PUD 113625067 PMD 0 Oops: 0010 [#1] PREEMPT SMP CPU: 1 PID: 5647 Comm: syz-executor.3 Not tainted 6.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc90003c73ee8 EFLAGS: 00010286 RAX: ffff888104be3000 RBX: 0000000000000000 RCX: 0000000000000002 RDX: 0000000000000001 RSI: ffffe8ffffd1b470 RDI: ffff888104be3000 RBP: ffff8881117e1bc0 R08: 0000000000020020 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881117e2558 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f5e4ae9d6c0(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 0000000102a5e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: task_work_run+0x55/0x80 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x13f/0x150 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x16/0x30 kernel/entry/common.c:297 do_syscall_64+0x44/0x80 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f5e4a07cb29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5e4ae9d0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: 0000000020000000 RBX: 00007f5e4a19c050 RCX: 00007f5e4a07cb29 RDX: 000000000080000a RSI: 0000000000b36000 RDI: 0000000020000000 RBP: 00007f5e4a0c847a R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f5e4a19c050 R15: 00007fffc20f9b08 Modules linked in: CR2: 0000000000000000 ---[ end trace 0000000000000000 ]--- RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc90003c73ee8 EFLAGS: 00010286 RAX: ffff888104be3000 RBX: 0000000000000000 RCX: 0000000000000002 RDX: 0000000000000001 RSI: ffffe8ffffd1b470 RDI: ffff888104be3000 RBP: ffff8881117e1bc0 R08: 0000000000020020 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881117e2558 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f5e4ae9d6c0(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 0000000102a5e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400