ci starts bisection 2025-03-18 15:42:21.46680738 +0000 UTC m=+17349.813129831 bisecting cause commit starting from fc444ada131001812c5d10b380837238c9cf7c8c building syzkaller on 22a6c2b1752ef57d8d612e233d35f6be8c3bf7df ensuring issue is reproducible on original commit fc444ada131001812c5d10b380837238c9cf7c8c testing commit fc444ada131001812c5d10b380837238c9cf7c8c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d63cd507ff9a26a42dafe1db3df4c3f569be067d266b0c66497b6ef2dd8af945 all runs: crashed: INFO: task hung in netfs_unbuffered_write_iter representative crash: INFO: task hung in netfs_unbuffered_write_iter, types: [HANG] check whether we can drop unnecessary instrumentation disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed testing commit fc444ada131001812c5d10b380837238c9cf7c8c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 400716b647c3fafa15cdc2d67670d27c58733ef12e1b47c55a609d552edd9c94 all runs: crashed: INFO: task hung in netfs_unbuffered_write_iter representative crash: INFO: task hung in netfs_unbuffered_write_iter, types: [HANG] the bug reproduces without the instrumentation disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed kconfig minimization: base=4064 full=8263 leaves diff=2113 split chunks (needed=false): <2113> split chunk #0 of len 2113 into 5 parts testing without sub-chunk 1/5 disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed testing commit fc444ada131001812c5d10b380837238c9cf7c8c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 21c2ffdd131b950aec9851d3119fc1fe5044b126f87226f9fe2ff3f5f7470641 all runs: crashed: INFO: task hung in netfs_unbuffered_write_iter representative crash: INFO: task hung in netfs_unbuffered_write_iter, types: [HANG] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit fc444ada131001812c5d10b380837238c9cf7c8c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 failed building fc444ada131001812c5d10b380837238c9cf7c8c: 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 LEAK UBSAN BUG KASAN LOCKDEP], they are not needed testing commit fc444ada131001812c5d10b380837238c9cf7c8c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d25d9324e8e5d17af111fcf873769f6f4f04f6c7c9bd24d220af133a751bff79 all runs: crashed: INFO: task hung in netfs_unbuffered_write_iter representative crash: INFO: task hung in netfs_unbuffered_write_iter, types: [HANG] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit fc444ada131001812c5d10b380837238c9cf7c8c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9c816847589a954e107bbfc4c41c4fbdd0b448831a17bfb19892ad62f5ae6d22 all runs: crashed: INFO: task hung in netfs_unbuffered_write_iter representative crash: INFO: task hung in netfs_unbuffered_write_iter, types: [HANG] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed testing commit fc444ada131001812c5d10b380837238c9cf7c8c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7a6eba1cfec6920a9054bcd9c403fcfc971a59577dc241b56d7b839f79b8cfd9 all runs: crashed: INFO: task hung in netfs_unbuffered_write_iter representative crash: INFO: task hung in netfs_unbuffered_write_iter, types: [HANG] the chunk can be dropped minimized to 423 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 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 LEAK UBSAN BUG KASAN], they are not needed picked [v6.13 v6.12 v6.11 v6.9 v6.7 v6.5 v6.3 v6.1 v5.18 v5.15 v5.12 v5.9 v5.6 v5.3 v5.0 v4.19] out of 36 release tags testing release v6.13 testing commit ffd294d346d185b70e28b1a28abe367bbfe53c04 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 65da2264c89bff20456de79b9f02f3bc2a7756bba0d895baaade29bdd9d3e5b1 all runs: OK false negative chance: 0.000 # git bisect start fc444ada131001812c5d10b380837238c9cf7c8c ffd294d346d185b70e28b1a28abe367bbfe53c04 Bisecting: 5883 revisions left to test after this (roughly 13 steps) [2c8d2a510c15c003749e43ac2b8e1bc79a7a00d6] Merge tag 'sound-6.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound testing commit 2c8d2a510c15c003749e43ac2b8e1bc79a7a00d6 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3afe546353b2b96d0774bc04772ad392ada8d59ccdc6ffbeae27f1fe98ab77c2 all runs: crashed: INFO: task hung in netfs_unbuffered_write_iter representative crash: INFO: task hung in netfs_unbuffered_write_iter, types: [HANG] # git bisect bad 2c8d2a510c15c003749e43ac2b8e1bc79a7a00d6 Bisecting: 3546 revisions left to test after this (roughly 12 steps) [5f537664e705b0bf8b7e329861f20128534f6a83] cachestat: fix page cache statistics permission checking testing commit 5f537664e705b0bf8b7e329861f20128534f6a83 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 50ea9c07e53334845bde0812b8ee3dc3b61c5c5c0416dc2508c0c18b3791428d all runs: crashed: INFO: task hung in netfs_unbuffered_write_iter representative crash: INFO: task hung in netfs_unbuffered_write_iter, types: [HANG] # git bisect bad 5f537664e705b0bf8b7e329861f20128534f6a83 Bisecting: 1258 revisions left to test after this (roughly 10 steps) [c0e75905caf368e19aab585d20151500e750de89] Merge tag 'trace-sorttable-v6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace testing commit c0e75905caf368e19aab585d20151500e750de89 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 560f18376c4a845019d068d0b4f2c32d52d01984e688ef1105a30c75f44f1a06 all runs: crashed: INFO: task hung in netfs_unbuffered_write_iter representative crash: INFO: task hung in netfs_unbuffered_write_iter, types: [HANG] # git bisect bad c0e75905caf368e19aab585d20151500e750de89 Bisecting: 664 revisions left to test after this (roughly 9 steps) [3d3a9c8b89d4f8a3785e06ffd15405c670696f02] Merge tag 'dlm-6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm testing commit 3d3a9c8b89d4f8a3785e06ffd15405c670696f02 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2827a67a141addfb0881eb28e80edaab6dffd7eba9bb26674349d27f34f7a9c4 all runs: crashed: INFO: task hung in netfs_unbuffered_write_iter representative crash: INFO: task hung in netfs_unbuffered_write_iter, types: [HANG] # git bisect bad 3d3a9c8b89d4f8a3785e06ffd15405c670696f02 Bisecting: 287 revisions left to test after this (roughly 8 steps) [0eb4aaa230d725fa9b1cd758c0f17abca5597af6] Merge tag 'for-6.14-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux testing commit 0eb4aaa230d725fa9b1cd758c0f17abca5597af6 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c0be27ed666d26df0d5245ee9777e12365eb5dc026237c9ab27d37039346d121 all runs: crashed: INFO: task hung in netfs_unbuffered_write_iter representative crash: INFO: task hung in netfs_unbuffered_write_iter, types: [HANG] # git bisect bad 0eb4aaa230d725fa9b1cd758c0f17abca5597af6 Bisecting: 150 revisions left to test after this (roughly 7 steps) [100ceb4817a2ac650e29f107cf97161ce3e2289a] Merge tag 'vfs-6.14-rc1.mount.v2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs testing commit 100ceb4817a2ac650e29f107cf97161ce3e2289a gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 0b31e42a4d187ed85c2a7aebc1f91e03acc5a4a4b871a6a8609cd80945b1d204 all runs: crashed: INFO: task hung in netfs_unbuffered_write_iter representative crash: INFO: task hung in netfs_unbuffered_write_iter, types: [HANG] # git bisect bad 100ceb4817a2ac650e29f107cf97161ce3e2289a Bisecting: 76 revisions left to test after this (roughly 6 steps) [4b84a4c8d40dfbfe1becec13a6e373e871e103e9] Merge tag 'vfs-6.14-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs testing commit 4b84a4c8d40dfbfe1becec13a6e373e871e103e9 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5ebb4a1c4039651fff4c84d98addba166b48c10940cee19f96e6fc42a09061db run #0: crashed: INFO: task hung in netfs_unbuffered_write_iter run #1: crashed: INFO: task hung in netfs_unbuffered_write_iter run #2: crashed: INFO: task hung in netfs_unbuffered_write_iter run #3: crashed: INFO: task hung in corrupted run #4: crashed: INFO: task hung in netfs_unbuffered_write_iter run #5: crashed: INFO: task hung in netfs_unbuffered_write_iter run #6: crashed: INFO: task hung in netfs_unbuffered_write_iter run #7: crashed: INFO: task hung in netfs_unbuffered_write_iter run #8: crashed: INFO: task hung in netfs_unbuffered_write_iter run #9: crashed: INFO: task hung in netfs_unbuffered_write_iter representative crash: INFO: task hung in netfs_unbuffered_write_iter, types: [HANG] # git bisect bad 4b84a4c8d40dfbfe1becec13a6e373e871e103e9 Bisecting: 38 revisions left to test after this (roughly 6 steps) [ca56a74a31e26d81a481304ed2f631e65883372b] Merge tag 'vfs-6.14-rc1.netfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs testing commit ca56a74a31e26d81a481304ed2f631e65883372b gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: dba34d9a0cf2196b2b2c1114195712eb7dff33cbdb590c1b7e47c7107e880acb all runs: OK false negative chance: 0.000 # git bisect good ca56a74a31e26d81a481304ed2f631e65883372b Bisecting: 18 revisions left to test after this (roughly 4 steps) [6a4ef7a2ff4dfdb7b345b13bd74fc68fe351bb45] Merge patch series "fix reading ESP during coredump" testing commit 6a4ef7a2ff4dfdb7b345b13bd74fc68fe351bb45 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a902b8f5773693e4bc97e7404367e3be98d30565a905edb0bf9106cc151aa1e8 all runs: crashed: INFO: task hung in netfs_unbuffered_write_iter representative crash: INFO: task hung in netfs_unbuffered_write_iter, types: [HANG] # git bisect bad 6a4ef7a2ff4dfdb7b345b13bd74fc68fe351bb45 Bisecting: 9 revisions left to test after this (roughly 3 steps) [9b7da575f85962c44abe7dc245b0a58179ad2c45] file: flush delayed work in delayed fput() testing commit 9b7da575f85962c44abe7dc245b0a58179ad2c45 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7aa8875110aefc5a18c7cd79a6a3ffdda47a48ea4a6ab22b586bf0f2df7f132f all runs: OK false negative chance: 0.000 # git bisect good 9b7da575f85962c44abe7dc245b0a58179ad2c45 Bisecting: 5 revisions left to test after this (roughly 2 steps) [ec052fae814d467d6aa7e591b4b24531b87e65ec] fs: sort out a stale comment about races between fd alloc and dup2 testing commit ec052fae814d467d6aa7e591b4b24531b87e65ec gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fa0fe1a9ce0edca2797939ed5552777b646b0e6e4b550640c7e85fe164a77a34 all runs: OK false negative chance: 0.000 # git bisect good ec052fae814d467d6aa7e591b4b24531b87e65ec Bisecting: 2 revisions left to test after this (roughly 2 steps) [aaec5a95d59615523db03dd53c2052f0a87beea7] pipe_read: don't wake up the writer if the pipe is still full testing commit aaec5a95d59615523db03dd53c2052f0a87beea7 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 43042d505233dd0644c21f9962cb1d0920b2cf91d7a142365dd94ecb920fe60d all runs: crashed: INFO: task hung in netfs_unbuffered_write_iter representative crash: INFO: task hung in netfs_unbuffered_write_iter, types: [HANG] # git bisect bad aaec5a95d59615523db03dd53c2052f0a87beea7 Bisecting: 0 revisions left to test after this (roughly 1 step) [d2fc0ed52a284a13a16c914bc83b0b8733f55a4a] Merge branch 'vfs-6.14.uncached_buffered_io' testing commit d2fc0ed52a284a13a16c914bc83b0b8733f55a4a gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d50d3465dda917709e865de4ab385a43a7dcd11833bfc895f1c6fc5bfcba426b all runs: OK false negative chance: 0.000 # git bisect good d2fc0ed52a284a13a16c914bc83b0b8733f55a4a aaec5a95d59615523db03dd53c2052f0a87beea7 is the first bad commit commit aaec5a95d59615523db03dd53c2052f0a87beea7 Author: Oleg Nesterov Date: Thu Jan 2 15:07:15 2025 +0100 pipe_read: don't wake up the writer if the pipe is still full wake_up(pipe->wr_wait) makes no sense if pipe_full() is still true after the reading, the writer sleeping in wait_event(wr_wait, pipe_writable()) will check the pipe_writable() == !pipe_full() condition and sleep again. Only wake the writer if we actually released a pipe buf, and the pipe was full before we did so. Signed-off-by: Oleg Nesterov Link: https://lore.kernel.org/all/20241229135737.GA3293@redhat.com/ Link: https://lore.kernel.org/r/20250102140715.GA7091@redhat.com Reported-by: WangYuli Signed-off-by: Christian Brauner fs/pipe.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) accumulated error probability: 0.00 culprit signature: 43042d505233dd0644c21f9962cb1d0920b2cf91d7a142365dd94ecb920fe60d parent signature: d50d3465dda917709e865de4ab385a43a7dcd11833bfc895f1c6fc5bfcba426b revisions tested: 20, total time: 5h37m5.229643557s (build: 2h37m47.907775402s, test: 2h39m15.720551171s) first bad commit: aaec5a95d59615523db03dd53c2052f0a87beea7 pipe_read: don't wake up the writer if the pipe is still full recipients (to): ["brauner@kernel.org" "linux-kernel@vger.kernel.org" "oleg@redhat.com"] recipients (cc): ["brauner@kernel.org" "jack@suse.cz" "linux-fsdevel@vger.kernel.org" "viro@zeniv.linux.org.uk"] crash: INFO: task hung in netfs_unbuffered_write_iter INFO: task syz.3.17:3528 blocked for more than 143 seconds. Not tainted 6.13.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.17 state:D stack:13576 pid:3528 tgid:3527 ppid:3110 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x4c4/0xac0 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x25/0x110 kernel/sched/core.c:6848 bit_wait+0xc/0x60 kernel/sched/wait_bit.c:237 __wait_on_bit+0x46/0x150 kernel/sched/wait_bit.c:49 out_of_line_wait_on_bit+0x92/0xb0 kernel/sched/wait_bit.c:64 wait_on_bit include/linux/wait_bit.h:77 [inline] netfs_unbuffered_write_iter_locked+0x31e/0x340 fs/netfs/direct_write.c:105 netfs_unbuffered_write_iter+0x113/0x1e0 fs/netfs/direct_write.c:193 new_sync_write fs/read_write.c:586 [inline] vfs_write+0x2b0/0x4b0 fs/read_write.c:679 ksys_write+0x6f/0xf0 fs/read_write.c:731 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x6d/0x170 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9d2e18d169 RSP: 002b:00007f9d2ef41038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f9d2e3a5fa0 RCX: 00007f9d2e18d169 RDX: 0000000000007fec RSI: 0000400000000540 RDI: 0000000000000007 RBP: 00007f9d2e20e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f9d2e3a5fa0 R15: 00007ffeae22a848 Showing all locks held in the system: 2 locks held by kworker/u8:0/11: #0: ffff888100078948 ((wq_completion)events_unbound){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3204 #1: ffffc90000063e58 ((work_completion)(&rreq->work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3205 1 lock held by khungtaskd/30: #0: ffffffff835e34c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff835e34c0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff835e34c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x36/0x120 kernel/locking/lockdep.c:6744 2 locks held by kworker/u8:2/38: #0: ffff888100078948 ((wq_completion)events_unbound){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3204 #1: ffffc90000147e58 ((work_completion)(&rreq->work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3205 2 locks held by kworker/u8:3/52: #0: ffff888100078948 ((wq_completion)events_unbound){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3204 #1: ffffc900001cfe58 ((work_completion)(&rreq->work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3205 2 locks held by kworker/u8:4/62: #0: ffff888100078948 ((wq_completion)events_unbound){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3204 #1: ffffc900001e7e58 ((work_completion)(&rreq->work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3205 2 locks held by kworker/u8:6/1456: #0: ffff888100078948 ((wq_completion)events_unbound){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3204 #1: ffffc90002dabe58 ((work_completion)(&rreq->work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3205 2 locks held by getty/1631: #0: ffff888102b398a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x23/0x60 drivers/tty/tty_ldisc.c:243 #1: ffffc900001fb2f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x54b/0x6a0 drivers/tty/n_tty.c:2211 3 locks held by syz.3.17/3528: #0: ffff888104bf4878 (&f->f_pos_lock){....}-{3:3}, at: fdget_pos+0xb2/0x1b0 fs/file.c:1191 #1: ffff88810570e410 (sb_writers#14){....}-{0:0}, at: ksys_write+0x6f/0xf0 fs/read_write.c:731 #2: ffff88817cdf0148 (&sb->s_type->i_mutex_key#20){....}-{3:3}, at: netfs_start_io_direct+0x79/0xd0 fs/netfs/locking.c:188 3 locks held by syz.4.19/3949: #0: ffff888105f746f8 (&f->f_pos_lock){....}-{3:3}, at: fdget_pos+0xb2/0x1b0 fs/file.c:1191 #1: ffff88810c7f6410 (sb_writers#14){....}-{0:0}, at: ksys_write+0x6f/0xf0 fs/read_write.c:731 #2: ffff88817cfb8148 (&sb->s_type->i_mutex_key#20){....}-{3:3}, at: netfs_start_io_direct+0x79/0xd0 fs/netfs/locking.c:188 3 locks held by syz.5.21/4370: #0: ffff888103fc5ef8 (&f->f_pos_lock){....}-{3:3}, at: fdget_pos+0xb2/0x1b0 fs/file.c:1191 #1: ffff8881037bf410 (sb_writers#14){....}-{0:0}, at: ksys_write+0x6f/0xf0 fs/read_write.c:731 #2: ffff88817cfb8730 (&sb->s_type->i_mutex_key#20){....}-{3:3}, at: netfs_start_io_direct+0x79/0xd0 fs/netfs/locking.c:188 3 locks held by syz.6.23/4791: #0: ffff8881740a72f8 (&f->f_pos_lock){....}-{3:3}, at: fdget_pos+0xb2/0x1b0 fs/file.c:1191 #1: ffff88810b2e7410 (sb_writers#14){....}-{0:0}, at: ksys_write+0x6f/0xf0 fs/read_write.c:731 #2: ffff88817cfb8d18 (&sb->s_type->i_mutex_key#20){....}-{3:3}, at: netfs_start_io_direct+0x79/0xd0 fs/netfs/locking.c:188 3 locks held by syz.7.25/5212: #0: ffff888102bad5f8 (&f->f_pos_lock){....}-{3:3}, at: fdget_pos+0xb2/0x1b0 fs/file.c:1191 #1: ffff88816bc4c410 (sb_writers#14){....}-{0:0}, at: ksys_write+0x6f/0xf0 fs/read_write.c:731 #2: ffff88817cdf0730 (&sb->s_type->i_mutex_key#20){....}-{3:3}, at: netfs_start_io_direct+0x79/0xd0 fs/netfs/locking.c:188 2 locks held by kworker/u8:8/5214: #0: ffff888100078948 ((wq_completion)events_unbound){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3204 #1: ffffc900044b3e58 ((work_completion)(&rreq->work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3205 3 locks held by syz.8.27/5635: #0: ffff88810a3aee78 (&f->f_pos_lock){....}-{3:3}, at: fdget_pos+0xb2/0x1b0 fs/file.c:1191 #1: ffff888104f13410 (sb_writers#14){....}-{0:0}, at: ksys_write+0x6f/0xf0 fs/read_write.c:731 #2: ffff88817cdf0d18 (&sb->s_type->i_mutex_key#20){....}-{3:3}, at: netfs_start_io_direct+0x79/0xd0 fs/netfs/locking.c:188 2 locks held by kworker/u8:9/5636: #0: ffff888100078948 ((wq_completion)events_unbound){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3204 #1: ffffc90004d53e58 ((work_completion)(&rreq->work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3205 3 locks held by syz.9.29/6057: #0: ffff888105f74278 (&f->f_pos_lock){....}-{3:3}, at: fdget_pos+0xb2/0x1b0 fs/file.c:1191 #1: ffff88810cf22410 (sb_writers#14){....}-{0:0}, at: ksys_write+0x6f/0xf0 fs/read_write.c:731 #2: ffff88817cdf1300 (&sb->s_type->i_mutex_key#20){....}-{3:3}, at: netfs_start_io_direct+0x79/0xd0 fs/netfs/locking.c:188 2 locks held by kworker/u8:10/6058: #0: ffff888100078948 ((wq_completion)events_unbound){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3204 #1: ffffc9000553be58 ((work_completion)(&rreq->work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3205 3 locks held by syz.0.31/6479: #0: ffff888100efa578 (&f->f_pos_lock){....}-{3:3}, at: fdget_pos+0xb2/0x1b0 fs/file.c:1191 #1: ffff88810cf24410 (sb_writers#14){....}-{0:0}, at: ksys_write+0x6f/0xf0 fs/read_write.c:731 #2: ffff88817cfb9300 (&sb->s_type->i_mutex_key#20){....}-{3:3}, at: netfs_start_io_direct+0x79/0xd0 fs/netfs/locking.c:188 2 locks held by kworker/u8:11/6481: #0: ffff888100078948 ((wq_completion)events_unbound){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3204 #1: ffffc90005d53e58 ((work_completion)(&rreq->work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3205 3 locks held by syz.1.33/6902: #0: ffff88810a3aeff8 (&f->f_pos_lock){....}-{3:3}, at: fdget_pos+0xb2/0x1b0 fs/file.c:1191 #1: ffff888111b7c410 (sb_writers#14){....}-{0:0}, at: ksys_write+0x6f/0xf0 fs/read_write.c:731 #2: ffff88817cfb98e8 (&sb->s_type->i_mutex_key#20){....}-{3:3}, at: netfs_start_io_direct+0x79/0xd0 fs/netfs/locking.c:188 2 locks held by kworker/u8:12/7260: #0: ffff888100078948 ((wq_completion)events_unbound){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3204 #1: ffffc90006c8be58 ((work_completion)(&rreq->work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3205 3 locks held by syz.2.35/7324: #0: ffff8881747d4878 (&f->f_pos_lock){....}-{3:3}, at: fdget_pos+0xb2/0x1b0 fs/file.c:1191 #1: ffff8881746fc410 (sb_writers#14){....}-{0:0}, at: ksys_write+0x6f/0xf0 fs/read_write.c:731 #2: ffff88817cdf18e8 (&sb->s_type->i_mutex_key#20){....}-{3:3}, at: netfs_start_io_direct+0x79/0xd0 fs/netfs/locking.c:188 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x5a/0x90 lib/dump_stack.c:120 nmi_cpu_backtrace+0xd4/0x110 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0xd5/0x140 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline] watchdog+0x63b/0x670 kernel/hung_task.c:397 kthread+0xd6/0x100 kernel/kthread.c:389 ret_from_fork+0x2c/0x50 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 7358 Comm: modprobe Not tainted 6.13.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:folio_put include/linux/mm.h:1487 [inline] RIP: 0010:filemap_map_pages+0x21b/0x6b0 mm/filemap.c:3686 Code: e3 08 48 83 44 24 28 01 f0 41 ff 45 34 09 5c 24 58 4c 89 ef e8 a6 cf ff ff 41 8b 45 34 85 c0 0f 84 73 01 00 00 f0 41 ff 4d 34 <0f> 84 4d 02 00 00 48 8b 54 24 20 48 8d 7c 24 68 48 8b 74 24 18 e8 RSP: 0000:ffffc90006da3d00 EFLAGS: 00000206 RAX: 0000000000000018 RBX: 0000000000000000 RCX: ffffc90006da3c7c RDX: 0000000000000005 RSI: ffffffff83245c7f RDI: ffffea0008df3240 RBP: 0000000000000029 R08: 0000000000000001 R09: ffff888174114e58 R10: 0000000000000001 R11: ffff88817417e90c R12: ffffc90006da3e10 R13: ffffea0008df3240 R14: 0000000000000029 R15: 0000000000000000 FS: 00007fca346eb500(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fca347aa9d3 CR3: 000000010d7d4000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_fault_around mm/memory.c:5280 [inline] do_read_fault mm/memory.c:5313 [inline] do_fault mm/memory.c:5456 [inline] do_pte_missing mm/memory.c:3979 [inline] handle_pte_fault mm/memory.c:5801 [inline] __handle_mm_fault+0x1264/0x1820 mm/memory.c:5944 handle_mm_fault+0x1db/0x360 mm/memory.c:6112 do_user_addr_fault arch/x86/mm/fault.c:1338 [inline] handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x256/0x6e0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7fca347aa9d3 Code: Unable to access opcode bytes at 0x7fca347aa9a9. RSP: 002b:00007ffc1e6ef9d8 EFLAGS: 00010202 RAX: 0000008c00000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 00007fca3487fd22 RSI: 00007fca34a166ed RDI: 0000000000000001 RBP: 00007ffc1e6efca0 R08: 000000000000ffff R09: 000000000000000d R10: 00007fca34779b74 R11: 0000000000000206 R12: 0000000000000000 R13: 0000008c9cc2cbfc R14: 0000000000000000 R15: 00007fca34a242a0