ci2 starts bisection 2026-08-21 05:02:53.119540948 +0000 UTC m=+279673.786216572 bisecting fixing commit since 08667c1437c07ce2e5d323165031ae152d6f061a building syzkaller on 4440e7c2e964875f9e35dba6deda12c2195f19d3 ensuring issue is reproducible on original commit 08667c1437c07ce2e5d323165031ae152d6f061a testing commit 08667c1437c07ce2e5d323165031ae152d6f061a gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: d638f5883f47d5d2f8be1e5c2137dcd0c9a08febd8cd9c5ba62598cfc7b3e909 all runs: crashed: kernel BUG in gfs2_withdraw representative crash: kernel BUG in gfs2_withdraw, types: [BUG] check whether we can drop unnecessary instrumentation disabling configs for [kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit 08667c1437c07ce2e5d323165031ae152d6f061a gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 7cb9a54877bcfdad29e9627a5e8dc51f4aac0702b8526837af486e56676efb7c all runs: crashed: kernel BUG in gfs2_withdraw representative crash: kernel BUG in gfs2_withdraw, types: [BUG] the bug reproduces without the instrumentation disabling configs for [kasan locking atomic_sleep hang memleak ubsan], they are not needed kconfig minimization: base=3913 full=7800 leaves diff=2159 split chunks (needed=false): <2159> split chunk #0 of len 2159 into 5 parts testing without sub-chunk 1/5 disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed testing commit 08667c1437c07ce2e5d323165031ae152d6f061a gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 27cd4eb750eed1fe49cbaafc84bd0813df1a24a55088c1a34d8addfe1d6dfdf0 all runs: crashed: kernel BUG in gfs2_withdraw representative crash: kernel BUG in gfs2_withdraw, types: [BUG] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit 08667c1437c07ce2e5d323165031ae152d6f061a gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 0ca5c11159fd1b370d388cd00d02f3fe19e4b79199e804f7c3ea8d2dcaf03797 all runs: OK false negative chance: 0.000 testing without sub-chunk 3/5 disabling configs for [kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit 08667c1437c07ce2e5d323165031ae152d6f061a gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: d25f0436fb32a17c748deb1030860dad365cf486bfab895ec4a25e310f83eea1 all runs: crashed: kernel BUG in gfs2_withdraw representative crash: kernel BUG in gfs2_withdraw, types: [BUG] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed testing commit 08667c1437c07ce2e5d323165031ae152d6f061a gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 20978b015b5c6bcd8cae8797818ba957b026393c8eb01db580808443730363d9 all runs: crashed: kernel BUG in gfs2_withdraw representative crash: kernel BUG in gfs2_withdraw, 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 08667c1437c07ce2e5d323165031ae152d6f061a gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: fa122bb1a97c3a054792b19ce5903395b7ced5666e7fc02970a6297638551616 all runs: crashed: kernel BUG in gfs2_withdraw representative crash: kernel BUG in gfs2_withdraw, 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 DLN2_ADC DMABUF_HEAPS DMABUF_HEAPS_CMA DMABUF_HEAPS_SYSTEM DMABUF_MOVE_NOTIFY DMA_CMA DMA_ENGINE_RAID DM_AUDIT DM_BIO_PRISON 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_BOCHS DRM_BRIDGE DRM_BUDDY DRM_CIRRUS_QEMU DRM_DEBUG_MM DRM_DISPLAY_DP_HELPER DRM_DISPLAY_HDCP_HELPER DRM_DISPLAY_HDMI_HELPER DRM_DISPLAY_HELPER DRM_DP_AUX_BUS DRM_DP_AUX_CHARDEV 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_TTM DRM_TTM_HELPER DRM_UDL DRM_VGEM DRM_VIRTIO_GPU DRM_VIRTIO_GPU_KMS DRM_VKMS DRM_VMWGFX DRM_VRAM_HELPER 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 EEPROM_93CX6 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_HELPERS FB_SYSMEM_HELPERS_DEFERRED FB_SYS_COPYAREA FB_SYS_FILLRECT FB_SYS_FOPS 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_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 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_VIPERBOARD GREENASIA_FF GREYBUS GREYBUS_BRIDGED_PHY GREYBUS_ES2 GREYBUS_HID GREYBUS_USB 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_KVM_CPU_RELAX_INTERCEPT HAVE_KVM_DIRTY_RING HAVE_KVM_DIRTY_RING_ACQ_REL HAVE_KVM_DIRTY_RING_TSO HAVE_KVM_EVENTFD HAVE_KVM_IRQCHIP HAVE_KVM_IRQFD HAVE_KVM_IRQ_BYPASS HAVE_KVM_IRQ_ROUTING HAVE_KVM_MSI HAVE_KVM_NO_POLL HAVE_KVM_PFNCACHE HAVE_KVM_PM_NOTIFIER 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_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_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 INTERVAL_TREE_SPAN_ITER IOMMUFD IOMMUFD_TEST IOMMU_SVA 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_SCTP 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 MPTCP MTD NETFILTER_ADVANCED NET_ACT_GACT NET_ACT_MIRRED NET_IPGRE_DEMUX NFT_FWD_NETDEV NF_TABLES NF_TABLES_NETDEV RADIO_ADAPTERS RADIO_SI4713 RAS RC_CORE REGULATOR RFKILL SND SOUND STAGING TRANSPARENT_HUGEPAGE TRUSTED_KEYS TYPEC TYPEC_MUX_PI3USB30532 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 determining the merge base between 08667c1437c07ce2e5d323165031ae152d6f061a and 818bebeb63dd6bf5f4e07e145f6cdbace520a34c ffc253263a1375a65fa6c9f62a893e9767fbebfa/Linux 6.6 is a merge base, check if it has the bug testing commit ffc253263a1375a65fa6c9f62a893e9767fbebfa gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 247bfece98ea92937bcaa0ce52c922dc5b8b9f6c18e19db03388d67a17b2b099 all runs: crashed: kernel BUG in gfs2_withdraw representative crash: kernel BUG in gfs2_withdraw, types: [BUG] testing current HEAD 818bebeb63dd6bf5f4e07e145f6cdbace520a34c testing commit 818bebeb63dd6bf5f4e07e145f6cdbace520a34c gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 0cc4b76ab50af8d3e9a0f4b1c7be845219d0211edd07f7f30d4130704c8169b2 all runs: OK false negative chance: 0.000 # git bisect start 818bebeb63dd6bf5f4e07e145f6cdbace520a34c ffc253263a1375a65fa6c9f62a893e9767fbebfa Bisecting: 128918 revisions left to test after this (roughly 17 steps) [390513642ee6763c7ada07f0a1470474986e6c1c] io_uring: always do atomic put from iowq determine whether the revision contains the guilty commit revision ffc253263a1375a65fa6c9f62a893e9767fbebfa crashed and is reachable testing commit 390513642ee6763c7ada07f0a1470474986e6c1c gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: a823aa68d8f5c2f80ac3387231759d8497a261e1333ca5099c22226a7607d113 all runs: crashed: kernel BUG in gfs2_withdraw representative crash: kernel BUG in gfs2_withdraw, types: [BUG] # git bisect good 390513642ee6763c7ada07f0a1470474986e6c1c Bisecting: 64449 revisions left to test after this (roughly 16 steps) [7eb7f5723df50a7d5564aa609e4c147f669a5cb4] Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi determine whether the revision contains the guilty commit revision 390513642ee6763c7ada07f0a1470474986e6c1c crashed and is reachable testing commit 7eb7f5723df50a7d5564aa609e4c147f669a5cb4 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: d5c4d462bcff1a205d72cebdb4757bd9e027e0139a5042b0991480d5605fffcb all runs: OK false negative chance: 0.000 # git bisect bad 7eb7f5723df50a7d5564aa609e4c147f669a5cb4 Bisecting: 31501 revisions left to test after this (roughly 15 steps) [260f6f4fda93c8485c8037865c941b42b9cba5d2] Merge tag 'drm-next-2025-07-30' of https://gitlab.freedesktop.org/drm/kernel determine whether the revision contains the guilty commit revision ffc253263a1375a65fa6c9f62a893e9767fbebfa crashed and is reachable testing commit 260f6f4fda93c8485c8037865c941b42b9cba5d2 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: fb6ca839e6e953f4d854d78e2ad874422d1c95c85d4e40daa56ed699a46648c8 all runs: crashed: kernel BUG in gfs2_withdraw representative crash: kernel BUG in gfs2_withdraw, types: [BUG] # git bisect good 260f6f4fda93c8485c8037865c941b42b9cba5d2 Bisecting: 15652 revisions left to test after this (roughly 14 steps) [f3826aa9962b4572d01083c84ac0f8345f121168] Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm determine whether the revision contains the guilty commit revision ffc253263a1375a65fa6c9f62a893e9767fbebfa crashed and is reachable testing commit f3826aa9962b4572d01083c84ac0f8345f121168 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 6233d67798d965343b9426fd5f26503b2e48dd48fe13171d02676b367530051d all runs: crashed: kernel BUG in gfs2_withdraw representative crash: kernel BUG in gfs2_withdraw, types: [BUG] # git bisect good f3826aa9962b4572d01083c84ac0f8345f121168 Bisecting: 8452 revisions left to test after this (roughly 13 steps) [015e7b0b0e8e51f7321ec2aafc1d7fc0a8a5536f] Merge tag 'bpf-next-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next determine whether the revision contains the guilty commit revision ffc253263a1375a65fa6c9f62a893e9767fbebfa crashed and is reachable testing commit 015e7b0b0e8e51f7321ec2aafc1d7fc0a8a5536f gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 7a376ad0e8dd25de81de9f28dd5fd6192d08a192ff7eb9906fc9ae3c34969263 all runs: crashed: kernel BUG in gfs2_withdraw representative crash: kernel BUG in gfs2_withdraw, types: [BUG] # git bisect good 015e7b0b0e8e51f7321ec2aafc1d7fc0a8a5536f Bisecting: 4112 revisions left to test after this (roughly 12 steps) [6dfafbd0299a60bfb5d5e277fdf100037c7ded07] Merge tag 'drm-next-2025-12-03' of https://gitlab.freedesktop.org/drm/kernel determine whether the revision contains the guilty commit revision 260f6f4fda93c8485c8037865c941b42b9cba5d2 crashed and is reachable testing commit 6dfafbd0299a60bfb5d5e277fdf100037c7ded07 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: bcd921d76b14db795f348bd00061fc2b8c65937d2b06727f12c881b9a4ea01ce all runs: OK false negative chance: 0.000 # git bisect bad 6dfafbd0299a60bfb5d5e277fdf100037c7ded07 Bisecting: 2166 revisions left to test after this (roughly 11 steps) [559e608c46553c107dbba19dae0854af7b219400] Merge tag 'ntfs3_for_6.19' of https://github.com/Paragon-Software-Group/linux-ntfs3 determine whether the revision contains the guilty commit revision 260f6f4fda93c8485c8037865c941b42b9cba5d2 crashed and is reachable testing commit 559e608c46553c107dbba19dae0854af7b219400 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: a0947b030de4f23f796f2cada662153efa85c826eff101ad71732c1590385630 all runs: OK false negative chance: 0.000 # git bisect bad 559e608c46553c107dbba19dae0854af7b219400 Bisecting: 1086 revisions left to test after this (roughly 10 steps) [b2a38f6df9dab0b05858746edcbe2403f8f4e4ec] net_sched: make room for (struct qdisc_skb_cb)->pkt_segs determine whether the revision contains the guilty commit revision ffc253263a1375a65fa6c9f62a893e9767fbebfa crashed and is reachable testing commit b2a38f6df9dab0b05858746edcbe2403f8f4e4ec gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 53f846787a5da85ba51eb7f7293912ad91e5131fafee341c8a60dcadbe3ab022 all runs: crashed: kernel BUG in gfs2_withdraw representative crash: kernel BUG in gfs2_withdraw, types: [BUG] # git bisect good b2a38f6df9dab0b05858746edcbe2403f8f4e4ec Bisecting: 540 revisions left to test after this (roughly 9 steps) [0abcfd8983e3d3d27b8f5f7d01fed4354eb422c4] Merge tag 'for-6.19/io_uring-20251201' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux determine whether the revision contains the guilty commit revision b2a38f6df9dab0b05858746edcbe2403f8f4e4ec crashed and is reachable testing commit 0abcfd8983e3d3d27b8f5f7d01fed4354eb422c4 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 3df268bf57c5ed1f4e2a40df7a63b7001f7f74aa4e1585f82b35319e88a4cc21 all runs: crashed: kernel BUG in gfs2_withdraw representative crash: kernel BUG in gfs2_withdraw, types: [BUG] # git bisect good 0abcfd8983e3d3d27b8f5f7d01fed4354eb422c4 Bisecting: 221 revisions left to test after this (roughly 8 steps) [7696286034ac72cf9b46499be1715ac62fd302c3] Merge tag 'for-6.19-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux determine whether the revision contains the guilty commit revision 390513642ee6763c7ada07f0a1470474986e6c1c crashed and is reachable testing commit 7696286034ac72cf9b46499be1715ac62fd302c3 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: cb780c4b654ed79d1a685dae5133a23a861ea9a97a37902da417d42cbd7ff837 all runs: crashed: kernel BUG in gfs2_withdraw representative crash: kernel BUG in gfs2_withdraw, types: [BUG] # git bisect good 7696286034ac72cf9b46499be1715ac62fd302c3 Bisecting: 121 revisions left to test after this (roughly 7 steps) [869737543b39a145809c41a7253c6ee777e22729] Merge tag 'v6.19-rc-smb-fixes' of git://git.samba.org/ksmbd determine whether the revision contains the guilty commit revision 0abcfd8983e3d3d27b8f5f7d01fed4354eb422c4 crashed and is reachable testing commit 869737543b39a145809c41a7253c6ee777e22729 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: c973749bc27793234264a984734b46551212a5443475c1d03b0e98b41b4ae271 all runs: crashed: kernel BUG in gfs2_withdraw representative crash: kernel BUG in gfs2_withdraw, types: [BUG] # git bisect good 869737543b39a145809c41a7253c6ee777e22729 Bisecting: 63 revisions left to test after this (roughly 6 steps) [91ef18b567dae84c0cea9b996d933c856e366f52] ext4: mark inodes without acls in __ext4_iget() determine whether the revision contains the guilty commit revision f3826aa9962b4572d01083c84ac0f8345f121168 crashed and is reachable testing commit 91ef18b567dae84c0cea9b996d933c856e366f52 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 213d2153f1f4b236a4c167f09f6f93f7945d9dd256929a4e17b00760eb6191b6 all runs: crashed: kernel BUG in gfs2_withdraw representative crash: kernel BUG in gfs2_withdraw, types: [BUG] # git bisect good 91ef18b567dae84c0cea9b996d933c856e366f52 Bisecting: 31 revisions left to test after this (roughly 5 steps) [3a88edc1657da9a847041ea994e66e26db9578d2] gfs2: Withdraw immediately in gfs2_trans_add_meta determine whether the revision contains the guilty commit revision f3826aa9962b4572d01083c84ac0f8345f121168 crashed and is reachable testing commit 3a88edc1657da9a847041ea994e66e26db9578d2 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: fe9767755023ba79e7fac022e0227b76233130d459fd228b213a2643218a2226 all runs: OK false negative chance: 0.000 # git bisect bad 3a88edc1657da9a847041ea994e66e26db9578d2 Bisecting: 15 revisions left to test after this (roughly 4 steps) [fab27b49305c8cabe9c5bf91a66f8ca4884c1aec] gfs2: Kill gfs2_io_error_bh_wd determine whether the revision contains the guilty commit revision 260f6f4fda93c8485c8037865c941b42b9cba5d2 crashed and is reachable testing commit fab27b49305c8cabe9c5bf91a66f8ca4884c1aec gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: c854516e48490c398c7fbbe0dc413a30b5eaba02435840db90c77df7f1b92bbe all runs: OK false negative chance: 0.000 # git bisect bad fab27b49305c8cabe9c5bf91a66f8ca4884c1aec Bisecting: 7 revisions left to test after this (roughly 3 steps) [5b351583a327f59438bb87832b8eedfa972e2c3d] gfs2: Minor cosmetic remote delete cleanups determine whether the revision contains the guilty commit revision f3826aa9962b4572d01083c84ac0f8345f121168 crashed and is reachable testing commit 5b351583a327f59438bb87832b8eedfa972e2c3d gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 9383f4f34419a7760f67186a3100201a1a23d3b7dfb64452c77c80a9a5c0ea16 all runs: crashed: kernel BUG in gfs2_withdraw representative crash: kernel BUG in gfs2_withdraw, types: [BUG] # git bisect good 5b351583a327f59438bb87832b8eedfa972e2c3d Bisecting: 3 revisions left to test after this (roughly 2 steps) [9c4a3de6cd5b46aa743c460b86eb58fe5f93daec] gfs2: Asynchronous withdraw determine whether the revision contains the guilty commit revision f3826aa9962b4572d01083c84ac0f8345f121168 crashed and is reachable testing commit 9c4a3de6cd5b46aa743c460b86eb58fe5f93daec gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 35d94dc06f85cca81ae66db082a24741c6b4eee9a3bf0173f22d17da2a823cf0 all runs: OK false negative chance: 0.000 # git bisect bad 9c4a3de6cd5b46aa743c460b86eb58fe5f93daec Bisecting: 1 revision left to test after this (roughly 1 step) [94f56488c7e47579aae8f20323c43d27b7b5f4ef] gfs2: Clean up quotad timeout handling determine whether the revision contains the guilty commit revision f3826aa9962b4572d01083c84ac0f8345f121168 crashed and is reachable testing commit 94f56488c7e47579aae8f20323c43d27b7b5f4ef gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 654049f66bc44a75d17e89ff8221ac7dfa444f715ee2d45f58bdbc0706ea0fc3 all runs: crashed: kernel BUG in gfs2_withdraw representative crash: kernel BUG in gfs2_withdraw, types: [BUG] # git bisect good 94f56488c7e47579aae8f20323c43d27b7b5f4ef Bisecting: 0 revisions left to test after this (roughly 0 steps) [9334c73fb16b183a6d4af09ce1d445f7f89b8d49] gfs2: Add clean argument to lm_unmount hook determine whether the revision contains the guilty commit revision 5b351583a327f59438bb87832b8eedfa972e2c3d crashed and is reachable testing commit 9334c73fb16b183a6d4af09ce1d445f7f89b8d49 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: ce9b076c40750c9f754c9e2e6e8177f4bbfb5bd17819c29a89ec1f8f32db8478 all runs: crashed: kernel BUG in gfs2_withdraw representative crash: kernel BUG in gfs2_withdraw, types: [BUG] # git bisect good 9334c73fb16b183a6d4af09ce1d445f7f89b8d49 9c4a3de6cd5b46aa743c460b86eb58fe5f93daec is the first bad commit commit 9c4a3de6cd5b46aa743c460b86eb58fe5f93daec Author: Andreas Gruenbacher Date: Tue Aug 5 23:12:06 2025 +0200 gfs2: Asynchronous withdraw So far, withdraws are carried out in the context of the calling task. When another task tries to withdraw while a withdraw is already underway, that task blocks as well. Change that to carry out withdraws asynchronously in workqueue context and don't block the task triggering the withdraw anymore. Fixes: syzbot+6b156e132970e550194c@syzkaller.appspotmail.com Signed-off-by: Andreas Gruenbacher fs/gfs2/incore.h | 1 + fs/gfs2/ops_fstype.c | 2 ++ fs/gfs2/super.c | 2 +- fs/gfs2/util.c | 55 +++++++++++++++++++++++++++++----------------------- fs/gfs2/util.h | 2 ++ 5 files changed, 37 insertions(+), 25 deletions(-) accumulated error probability: 0.00 culprit signature: 35d94dc06f85cca81ae66db082a24741c6b4eee9a3bf0173f22d17da2a823cf0 parent signature: ce9b076c40750c9f754c9e2e6e8177f4bbfb5bd17819c29a89ec1f8f32db8478 revisions tested: 27, total time: 6h49m10.197251316s (build: 2h24m58.55785264s, test: 3h25m4.052263426s) first good commit: 9c4a3de6cd5b46aa743c460b86eb58fe5f93daec gfs2: Asynchronous withdraw recipients (to): ["agruenba@redhat.com"] recipients (cc): []