ci starts bisection 2025-11-01 22:11:07.439346006 +0000 UTC m=+176146.974695665 bisecting cause commit starting from 98bd8b16ae57e8f25c95d496fcde3dfdd8223d41 building syzkaller on 2c50b6a91afe391fad4d14f7b7d7167d570089dd ensuring issue is reproducible on original commit 98bd8b16ae57e8f25c95d496fcde3dfdd8223d41 testing commit 98bd8b16ae57e8f25c95d496fcde3dfdd8223d41 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 6c54d0d0591ef19356abf0232ccf0e3bcf7456221253bcfd6c679527dd54d40e all runs: crashed: kernel BUG in folio_end_read representative crash: kernel BUG in folio_end_read, types: [BUG] check whether we can drop unnecessary instrumentation disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed testing commit 98bd8b16ae57e8f25c95d496fcde3dfdd8223d41 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5a8f9ba49984ea231a7f561acad7891f74987d667a8ecf5e364b7f90525a204d all runs: crashed: kernel BUG in folio_end_read representative crash: kernel BUG in folio_end_read, types: [BUG] the bug reproduces without the instrumentation disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed kconfig minimization: base=4116 full=8547 leaves diff=2160 split chunks (needed=false): <2160> split chunk #0 of len 2160 into 5 parts testing without sub-chunk 1/5 disabling configs for [locking atomic_sleep hang memleak ubsan kasan], they are not needed testing commit 98bd8b16ae57e8f25c95d496fcde3dfdd8223d41 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 9907f95f83bcae3f4235486651a21dda147a3dc863c81ce109506d2e90c584bf all runs: crashed: kernel BUG in folio_end_read representative crash: kernel BUG in folio_end_read, types: [BUG] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed testing commit 98bd8b16ae57e8f25c95d496fcde3dfdd8223d41 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 7ab7ab74ad887dc64eddf06f4c293fc7b58add3d545944c7ed899b56e0c28b03 run #0: crashed: WARNING in get_data run #1: crashed: WARNING in get_data run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK representative crash: WARNING in get_data, types: [WARNING] testing without sub-chunk 3/5 disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed testing commit 98bd8b16ae57e8f25c95d496fcde3dfdd8223d41 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0bced7f19b44d547b18ea1e927cf604f6a31a660c6606044d24cfbe3d7544b58 all runs: crashed: kernel BUG in folio_end_read representative crash: kernel BUG in folio_end_read, types: [BUG] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [atomic_sleep hang memleak ubsan kasan locking], they are not needed testing commit 98bd8b16ae57e8f25c95d496fcde3dfdd8223d41 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 349e91c677a3fccd43f156474a6368b4a28e5ad3e45d95a5fe8050e7239dfd1b all runs: crashed: kernel BUG in folio_end_read representative crash: kernel BUG in folio_end_read, types: [BUG] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed testing commit 98bd8b16ae57e8f25c95d496fcde3dfdd8223d41 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: fd2ae00970ba8d4aefb9dabd1bc56146de88e3e40b19c32ad8fff7eafe3fe7a7 all runs: crashed: kernel BUG in folio_end_read representative crash: kernel BUG in folio_end_read, types: [BUG] the chunk can be dropped minimized to 432 configs; suspects: [6LOWPAN ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI BLK_DEV_ZONED CHARGER_BQ24190 CMA COMMON_CLK DAX DLM DM_BUFIO DM_CACHE DM_CACHE_SMQ DM_CLONE DM_CRYPT DM_FLAKEY DM_INTEGRITY DM_MULTIPATH DM_MULTIPATH_QL DM_MULTIPATH_ST DM_PERSISTENT_DATA DM_RAID DM_SNAPSHOT DM_THIN_PROVISIONING DM_UEVENT DM_VERITY DM_VERITY_FEC DM_WRITECACHE DM_ZONED DRAGONRISE_FF DRM DRM_AUX_BRIDGE DRM_BOCHS DRM_BRIDGE DRM_BUDDY DRM_CIRRUS_QEMU DRM_CLIENT DRM_CLIENT_DEFAULT_FBDEV DRM_CLIENT_LIB DRM_CLIENT_SELECTION DRM_CLIENT_SETUP DRM_DEBUG_MM DRM_DISPLAY_DP_AUX_BUS DRM_DISPLAY_DP_HELPER DRM_DISPLAY_DSC_HELPER DRM_DISPLAY_HDCP_HELPER DRM_DISPLAY_HDMI_HELPER DRM_DISPLAY_HELPER DRM_FBDEV_EMULATION DRM_GEM_SHMEM_HELPER DRM_GM12U320 DRM_GUD DRM_I915 DRM_I915_CAPTURE_ERROR DRM_I915_COMPRESS_ERROR DRM_I915_USERPTR DRM_KMS_HELPER DRM_MIPI_DSI DRM_PANEL DRM_PANEL_BRIDGE DRM_PANEL_EDP DRM_PANEL_ORIENTATION_QUIRKS DRM_SIMPLEDRM DRM_SYSFB_HELPER 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 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 GROUP_SCHED_BANDWIDTH GTP GUEST_PERF_EVENTS HAS_LTO_CLANG HAVE_ARCH_NODE_DEV_GROUP HAVE_ARCH_USERFAULTFD_MINOR HAVE_ARCH_USERFAULTFD_WP HAVE_BOOTMEM_INFO_NODE HAVE_CLK_PREPARE HAVE_KLP_BUILD 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_DRAGONRISE 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_HAPTIC HID_HOLTEK HID_ICADE HID_JABRA HID_KEYTOUCH HID_KYE HID_LCPOWER HID_LED HID_LENOVO HID_LETSKETCH HID_LOGITECH 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_DIAG INET_DIAG_DESTROY INET_ESP INET_ESPINTCP INET_ESP_OFFLOAD INET_IPCOMP INET_MPTCP_DIAG INET_PSP 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 IO_URING_MOCK_FILE IP6_NF_FILTER IP6_NF_IPTABLES_LEGACY IP6_NF_MANGLE 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_REJECT 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_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_SCTP IRQ_TIME_ACCOUNTING LAPB LCD_CLASS_DEVICE LEDS_CLASS_MULTICOLOR 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 NETFILTER_XTABLES_LEGACY 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 TRUSTED_KEYS TYPEC TYPEC_MUX_PI3USB30532 USB_LJCA USB_ROLES_INTEL_XHCI USB_ROLE_SWITCH VIDEO_DEV VIRTIO_FS WAN ZONE_DEVICE] disabling configs for [locking atomic_sleep hang memleak ubsan kasan], they are not needed picked [v6.17 v6.16 v6.15 v6.13 v6.11 v6.9 v6.7 v6.5 v6.2 v5.19 v5.16 v5.13 v5.10 v5.7 v5.4 v5.1 v4.19] out of 40 release tags testing release v6.17 testing commit e5f0a698b34ed76002dc5cff3804a61c80233a7a gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 92cd90f7c9ea59418d745c0a4e1b7582d9aa38edb6c6b476dc0ce115f684c60b all runs: OK false negative chance: 0.000 # git bisect start 98bd8b16ae57e8f25c95d496fcde3dfdd8223d41 e5f0a698b34ed76002dc5cff3804a61c80233a7a Bisecting: 9549 revisions left to test after this (roughly 13 steps) [50647a1176b7abd1b4ae55b491eb2fbbeef89db9] Merge tag 'pull-f_path' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs testing commit 50647a1176b7abd1b4ae55b491eb2fbbeef89db9 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 2d6b91771d21aac8b76a695e9873863cdbd3a4ff5fd9fd9e5a58386071af4eaf all runs: OK false negative chance: 0.000 # git bisect good 50647a1176b7abd1b4ae55b491eb2fbbeef89db9 Bisecting: 4776 revisions left to test after this (roughly 12 steps) [60a47563751a1db781b8bb81bc8024bc1ce22caf] Merge branch 'mm-nonmm-unstable' of https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm testing commit 60a47563751a1db781b8bb81bc8024bc1ce22caf gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: b8db57c52daad544dd1ca6bb77aa88f851543dfc6e957d3fb2c25a155a0bcc6e all runs: OK false negative chance: 0.000 # git bisect good 60a47563751a1db781b8bb81bc8024bc1ce22caf Bisecting: 2169 revisions left to test after this (roughly 11 steps) [b3cb4468eaa6aba6c9ce48b178c8af44f63f20b0] Merge branch 'drm-next' of https://gitlab.freedesktop.org/drm/kernel.git testing commit b3cb4468eaa6aba6c9ce48b178c8af44f63f20b0 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 4d4c419b13790cd33c638b83d82d4e313373b9ad7b721e6814548db62a1f72fa all runs: crashed: kernel BUG in folio_end_read representative crash: kernel BUG in folio_end_read, types: [BUG] # git bisect bad b3cb4468eaa6aba6c9ce48b178c8af44f63f20b0 Bisecting: 1266 revisions left to test after this (roughly 10 steps) [c3db583c2b3aea9219ab0e57962576e26811c383] Merge branch 'docs-next' of git://git.lwn.net/linux.git testing commit c3db583c2b3aea9219ab0e57962576e26811c383 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 3dfe28b81630932249dd879ee90dde58a3cfe83543b0a4c6bd3ce65ff57a6b9c all runs: crashed: kernel BUG in folio_end_read representative crash: kernel BUG in folio_end_read, types: [BUG] # git bisect bad c3db583c2b3aea9219ab0e57962576e26811c383 Bisecting: 665 revisions left to test after this (roughly 9 steps) [69fa65271dcddde9e590c5a69705c8e7ccdedb29] Merge branch 'for-next' of https://github.com/spacemit-com/linux testing commit 69fa65271dcddde9e590c5a69705c8e7ccdedb29 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: a946681b59f5488a9fcf917ff0d5dc85e4c507aece0ea4159724720a221797dd all runs: OK false negative chance: 0.000 # git bisect good 69fa65271dcddde9e590c5a69705c8e7ccdedb29 Bisecting: 265 revisions left to test after this (roughly 8 steps) [960320cff5d67ad51822395aea61c32357d9df7e] Merge branch 'fs-next' of linux-next testing commit 960320cff5d67ad51822395aea61c32357d9df7e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: fe37a33ae18c3c645de988c2acae1cf874a2a14d19ca020d62fd0e75ad382baf all runs: crashed: kernel BUG in folio_end_read representative crash: kernel BUG in folio_end_read, types: [BUG] # git bisect bad 960320cff5d67ad51822395aea61c32357d9df7e Bisecting: 167 revisions left to test after this (roughly 8 steps) [7d8c88228d7ed136f2d354e69a551ef2bd551922] next-20251030/vfs-brauner testing commit 7d8c88228d7ed136f2d354e69a551ef2bd551922 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 6f2cb3373bb432596fc881b7c6f81fb3da4c472488f3daf4cf64737ce49d8492 all runs: crashed: kernel BUG in folio_end_read representative crash: kernel BUG in folio_end_read, types: [BUG] # git bisect bad 7d8c88228d7ed136f2d354e69a551ef2bd551922 Bisecting: 119 revisions left to test after this (roughly 7 steps) [a40dd1c30f9b4794b773157a05581b50aaa8ee01] Merge branch 'dev' of https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git testing commit a40dd1c30f9b4794b773157a05581b50aaa8ee01 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: ac01bcee2000a37fe4292205f02edf389a6ef0b32de4863dc66f70af9fba6e57 all runs: OK false negative chance: 0.000 # git bisect good a40dd1c30f9b4794b773157a05581b50aaa8ee01 Bisecting: 66 revisions left to test after this (roughly 6 steps) [947bc685d5f56c3b3d981839dfbd0b9d76240901] Merge branch 'vfs-6.19.inode' into vfs.all testing commit 947bc685d5f56c3b3d981839dfbd0b9d76240901 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: eabd625f2ccfc70c87b25d96d9deca93a7117e4df34a9548764577ddc1b4608a all runs: crashed: kernel BUG in folio_end_read representative crash: kernel BUG in folio_end_read, types: [BUG] # git bisect bad 947bc685d5f56c3b3d981839dfbd0b9d76240901 Bisecting: 26 revisions left to test after this (roughly 5 steps) [e5d51aced09bd5d4ef3a66ea70e239b81d61e2be] iomap: add IOMAP_DIO_FSBLOCK_ALIGNED flag testing commit e5d51aced09bd5d4ef3a66ea70e239b81d61e2be gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0b0fc9a16868068764bb88a0035838f51686417ca05cea673136ca4fd51e5528 all runs: crashed: kernel BUG in folio_end_read representative crash: kernel BUG in folio_end_read, types: [BUG] # git bisect bad e5d51aced09bd5d4ef3a66ea70e239b81d61e2be Bisecting: 12 revisions left to test after this (roughly 4 steps) [7c07a8e3e7dbbe34cb5f3da1f57ab6cb2f52811c] iomap: make iomap_read_folio() a void return testing commit 7c07a8e3e7dbbe34cb5f3da1f57ab6cb2f52811c gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 836309a86ff61ef7b960eae4d1435943a38035e70d07278c555b279687a74d08 all runs: crashed: kernel BUG in folio_end_read representative crash: kernel BUG in folio_end_read, types: [BUG] # git bisect bad 7c07a8e3e7dbbe34cb5f3da1f57ab6cb2f52811c Bisecting: 6 revisions left to test after this (roughly 3 steps) [e0e15340e41e99334670caa3807133f23f43064f] iomap: iterate over folio mapping in iomap_readpage_iter() testing commit e0e15340e41e99334670caa3807133f23f43064f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 37e26e6fd3a7e045714faba17e2c9dcb898f537003d871181d8677c7218f2352 run #0: ignore: lost connection to test machine run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK false negative chance: 0.000 # git bisect good e0e15340e41e99334670caa3807133f23f43064f Bisecting: 3 revisions left to test after this (roughly 2 steps) [51311f045375984dabdf8cc523e80d39a4c3dd5a] iomap: track pending read bytes more optimally testing commit 51311f045375984dabdf8cc523e80d39a4c3dd5a gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: c59b72a3cd6d80d5341b861bc88b87021e4ad476f37c7509def18abadb3df49a all runs: crashed: kernel BUG in folio_end_read representative crash: kernel BUG in folio_end_read, types: [BUG] # git bisect bad 51311f045375984dabdf8cc523e80d39a4c3dd5a Bisecting: 0 revisions left to test after this (roughly 1 step) [87a13819dde34e8af247744e979583a31d353244] iomap: rename iomap_readpage_ctx struct to iomap_read_folio_ctx testing commit 87a13819dde34e8af247744e979583a31d353244 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: dd3dd52528964314f4e8ffa4b58a667d9616dd675a897a93a7cf32a08865a557 all runs: OK false negative chance: 0.000 # git bisect good 87a13819dde34e8af247744e979583a31d353244 51311f045375984dabdf8cc523e80d39a4c3dd5a is the first bad commit commit 51311f045375984dabdf8cc523e80d39a4c3dd5a Author: Joanne Koong Date: Thu Sep 25 17:26:02 2025 -0700 iomap: track pending read bytes more optimally Instead of incrementing read_bytes_pending for every folio range read in (which requires acquiring the spinlock to do so), set read_bytes_pending to the folio size when the first range is asynchronously read in, keep track of how many bytes total are asynchronously read in, and adjust read_bytes_pending accordingly after issuing requests to read in all the necessary ranges. iomap_read_folio_ctx->cur_folio_in_bio can be removed since a non-zero value for pending bytes necessarily indicates the folio is in the bio. Signed-off-by: Joanne Koong Suggested-by: Darrick J. Wong Signed-off-by: Christian Brauner fs/iomap/buffered-io.c | 87 ++++++++++++++++++++++++++++++++++++++------------ 1 file changed, 66 insertions(+), 21 deletions(-) accumulated error probability: 0.00 culprit signature: c59b72a3cd6d80d5341b861bc88b87021e4ad476f37c7509def18abadb3df49a parent signature: dd3dd52528964314f4e8ffa4b58a667d9616dd675a897a93a7cf32a08865a557 reproducer is flaky (1.00 repro chance estimate) revisions tested: 22, total time: 7h27m29.994799534s (build: 4h11m28.732567741s, test: 2h18m52.649377704s) first bad commit: 51311f045375984dabdf8cc523e80d39a4c3dd5a iomap: track pending read bytes more optimally recipients (to): ["brauner@kernel.org" "brauner@kernel.org" "joannelkoong@gmail.com" "linux-fsdevel@vger.kernel.org" "linux-xfs@vger.kernel.org"] recipients (cc): ["djwong@kernel.org" "linux-kernel@vger.kernel.org"] crash: kernel BUG in folio_end_read ext4_evict_inode+0xc8/0x6f0 fs/ext4/inode.c:196 evict+0x1f5/0x360 fs/inode.c:810 do_unlinkat+0x1ec/0x2c0 fs/namei.c:4744 __do_sys_unlink fs/namei.c:4783 [inline] __se_sys_unlink fs/namei.c:4781 [inline] __x64_sys_unlink+0x1c/0x30 fs/namei.c:4781 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0x2f0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f ------------[ cut here ]------------ kernel BUG at mm/filemap.c:1537! Oops: invalid opcode: 0000 [#1] SMP PTI CPU: 0 UID: 0 PID: 3617 Comm: syz.3.17 Not tainted syzkaller #0 PREEMPT(none) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:folio_end_read+0x51/0x70 mm/filemap.c:1537 Code: 07 31 f6 e9 e1 fe ff ff c3 cc cc cc cc cc 48 c7 c6 b3 72 45 83 e8 cf b4 d8 ff 90 0f 0b 48 c7 c6 2c 0b 3f 83 e8 c0 b4 d8 ff 90 <0f> 0b 48 c7 c6 15 ef 4a 83 e8 b1 b4 d8 ff 90 0f 0b 66 66 66 66 66 RSP: 0018:ffffc90002643110 EFLAGS: 00010246 RAX: 585eb7d128174100 RBX: ffffffff82c71780 RCX: 585eb7d128174100 RDX: 0000000000000002 RSI: ffffffff8355d782 RDI: ffff888108af3680 RBP: ffffc90002643388 R08: 0000000000001fff R09: ffffffff838fee80 R10: 0000000000005ffd R11: 00000000ffffdfff R12: ffffc90002643118 R13: ffffea0005aea300 R14: ffffc90002643138 R15: ffffc90002643120 FS: 00007f9235df76c0(0000) GS:ffff8882b3418000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fad2c472000 CR3: 0000000103722000 CR4: 00000000003506f0 Call Trace: iomap_readahead+0x26b/0x370 fs/iomap/buffered-io.c:611 read_pages+0x8d/0x160 mm/readahead.c:163 page_cache_ra_order+0x26d/0x470 mm/readahead.c:518 filemap_readahead mm/filemap.c:2606 [inline] filemap_get_pages+0x248/0x8e0 mm/filemap.c:2652 filemap_read+0xe9/0x4d0 mm/filemap.c:2748 __kernel_read+0x193/0x2a0 fs/read_write.c:530 integrity_kernel_read+0x2a/0x50 security/integrity/iint.c:28 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:480 [inline] ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline] ima_calc_file_hash+0x54b/0xa90 security/integrity/ima/ima_crypto.c:568 ima_collect_measurement+0x223/0x3d0 security/integrity/ima/ima_api.c:293 process_measurement+0x5bc/0x910 security/integrity/ima/ima_main.c:405 ima_file_check+0x5a/0x90 security/integrity/ima/ima_main.c:633 security_file_post_open+0x3f/0x130 security/security.c:3199 do_open fs/namei.c:3977 [inline] path_openat+0xc7c/0xee0 fs/namei.c:4134 do_filp_open+0xc6/0x180 fs/namei.c:4161 do_sys_openat2+0x7c/0xd0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0x7b/0xa0 fs/open.c:1463 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0x2f0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9235f8efc9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9235df7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f92361e5fa0 RCX: 00007f9235f8efc9 RDX: 0000000000121140 RSI: 0000200000000000 RDI: ffffffffffffff9c RBP: 00007f9236011f91 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000013d R11: 0000000000000246 R12: 0000000000000000 R13: 00007f92361e6038 R14: 00007f92361e5fa0 R15: 00007ffc7f8cdaa8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:folio_end_read+0x51/0x70 mm/filemap.c:1537 Code: 07 31 f6 e9 e1 fe ff ff c3 cc cc cc cc cc 48 c7 c6 b3 72 45 83 e8 cf b4 d8 ff 90 0f 0b 48 c7 c6 2c 0b 3f 83 e8 c0 b4 d8 ff 90 <0f> 0b 48 c7 c6 15 ef 4a 83 e8 b1 b4 d8 ff 90 0f 0b 66 66 66 66 66 RSP: 0018:ffffc90002643110 EFLAGS: 00010246 RAX: 585eb7d128174100 RBX: ffffffff82c71780 RCX: 585eb7d128174100 RDX: 0000000000000002 RSI: ffffffff8355d782 RDI: ffff888108af3680 RBP: ffffc90002643388 R08: 0000000000001fff R09: ffffffff838fee80 R10: 0000000000005ffd R11: 00000000ffffdfff R12: ffffc90002643118 R13: ffffea0005aea300 R14: ffffc90002643138 R15: ffffc90002643120 FS: 00007f9235df76c0(0000) GS:ffff8882b3418000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fad2c472000 CR3: 0000000103722000 CR4: 00000000003506f0