ci2 starts bisection 2025-06-25 13:33:22.044661658 +0000 UTC m=+72417.494265875 bisecting fixing commit since 85652baa895b59b94bea29c77cb9b51cf7120deb building syzkaller on dbc93b085f18cf00b6c0e077c902b5f83ecbe76c ensuring issue is reproducible on original commit 85652baa895b59b94bea29c77cb9b51cf7120deb testing commit 85652baa895b59b94bea29c77cb9b51cf7120deb gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: ee9980385df816c2771eddd56aea85b5b62cd6375cb8c82edaa9a4881aea2d39 all runs: crashed: INFO: task hung in xfs_buf_item_unpin representative crash: INFO: task hung in xfs_buf_item_unpin, types: [HANG] check whether we can drop unnecessary instrumentation disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed testing commit 85652baa895b59b94bea29c77cb9b51cf7120deb gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 9723354a33effb19c6d651f5653904d7d870f864b32d0b217c74e0020405f4e2 all runs: crashed: INFO: task hung in xfs_buf_item_unpin representative crash: INFO: task hung in xfs_buf_item_unpin, 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=4088 full=8129 leaves diff=2143 split chunks (needed=false): <2143> split chunk #0 of len 2143 into 5 parts testing without sub-chunk 1/5 disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 85652baa895b59b94bea29c77cb9b51cf7120deb gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: d2ea118609dc043fa7f564edb9cfacd19f50ea0b85f8bc1bf9caad46a48b4db2 all runs: crashed: INFO: task hung in xfs_buf_item_unpin representative crash: INFO: task hung in xfs_buf_item_unpin, types: [HANG] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed testing commit 85652baa895b59b94bea29c77cb9b51cf7120deb gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 490a430c23bb1cf6045daab0dd561635b53c9f3fdc8fd24033cd7a61e057d365 all runs: crashed: INFO: task hung in xfs_buf_item_unpin representative crash: INFO: task hung in xfs_buf_item_unpin, types: [HANG] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 85652baa895b59b94bea29c77cb9b51cf7120deb gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 8ac142a64c7542f42e29b95328840fc87d5ae040ad6488ec8d58611d3614afac all runs: crashed: INFO: task hung in xfs_buf_item_unpin representative crash: INFO: task hung in xfs_buf_item_unpin, types: [HANG] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed testing commit 85652baa895b59b94bea29c77cb9b51cf7120deb gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 4caa9c1a3fa436dad373d2018bb3ca5f9ef4b31b27aa56dd880054cb1e432972 all runs: crashed: INFO: task hung in xfs_buf_item_unpin representative crash: INFO: task hung in xfs_buf_item_unpin, types: [HANG] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed testing commit 85652baa895b59b94bea29c77cb9b51cf7120deb gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 1aee6d60a5a8a8eee454e971a336833c8164cbd5ff3c27370051a038a9c067c1 all runs: OK false negative chance: 0.000 minimized to 427 configs; suspects: [ARCH_ENABLE_MEMORY_HOTREMOVE ATM BCMA BLK_DEV_ZONED BPF_SYSCALL CARDBUS CFG80211 CFG80211_WEXT CMA COMMON_CLK CONTIG_ALLOC CRYPTO_842 CRYPTO_LZ4 CRYPTO_LZ4HC CRYPTO_ZSTD DVB_CORE EXTCON FB GPIOLIB HAVE_ZSMALLOC HID_ZEROPLUS I2C_MUX IIO IOMMUFD IRQ_REMAP KVM KVM_INTEL LIBNVDIMM MCORE2 MEDIA_ANALOG_TV_SUPPORT MEDIA_CAMERA_SUPPORT MEDIA_CEC_SUPPORT MEDIA_CONTROLLER MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_VIPERBOARD NOP_USB_XCEIV PARPORT PCCARD PCMCIA PHONET RADIO_ADAPTERS RADIO_SI470X RADIO_SI4713 RC_CORE RFKILL SND SOUND SPI SSB TAP TARGET_CORE TUN USB_AMD5536UDC USB_ATM USB_CDNS3 USB_CDNS3_PCI_WRAP USB_CDNSP_GADGET USB_CDNSP_HOST USB_CDNSP_PCI USB_CDNS_HOST USB_CDNS_SUPPORT USB_CHAOSKEY USB_CHIPIDEA USB_CHIPIDEA_GENERIC USB_CHIPIDEA_HOST USB_CHIPIDEA_MSM USB_CHIPIDEA_NPCM 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_CONFIGFS_F_LB_SS USB_CONFIGFS_F_MIDI USB_CONFIGFS_F_MIDI2 USB_CONFIGFS_F_PRINTER USB_CONFIGFS_F_TCM USB_CONFIGFS_F_UAC1 USB_CONFIGFS_F_UAC1_LEGACY USB_CONFIGFS_F_UAC2 USB_CONFIGFS_F_UVC USB_CONFIGFS_MASS_STORAGE USB_CONFIGFS_NCM USB_CONFIGFS_OBEX USB_CONFIGFS_PHONET USB_CONFIGFS_RNDIS USB_CONFIGFS_SERIAL USB_CONN_GPIO USB_CXACRU USB_CYPRESS_CY7C63 USB_CYTHERM USB_DSBR USB_DUMMY_HCD USB_DWC2 USB_DWC2_HOST USB_DWC2_PCI USB_DWC3 USB_DWC3_GADGET USB_DWC3_HAPS USB_DWC3_OF_SIMPLE USB_DWC3_PCI USB_DWC3_ULPI USB_DYNAMIC_MINORS USB_EG20T USB_EHCI_FSL USB_EHCI_HCD_PLATFORM USB_EHCI_ROOT_HUB_TT USB_EHSET_TEST_FIXTURE USB_EMI26 USB_EMI62 USB_EPSON2888 USB_EZUSB_FX2 USB_FEW_INIT_RETRIES USB_F_ACM USB_F_ECM USB_F_EEM USB_F_FS USB_F_HID USB_F_MASS_STORAGE USB_F_MIDI USB_F_MIDI2 USB_F_NCM USB_F_OBEX 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USB_GSPCA_VICAM USB_GSPCA_XIRLINK_CIT USB_GSPCA_ZC3XX USB_HACKRF USB_HCD_BCMA USB_HCD_SSB USB_HSIC_USB3503 USB_HSIC_USB4604 USB_HSO USB_HUB_USB251XB USB_IDMOUSE USB_IOWARRIOR USB_IPHETH USB_ISIGHTFW USB_ISP116X_HCD USB_ISP1301 USB_ISP1760 USB_ISP1760_DUAL_ROLE USB_ISP1760_HCD USB_ISP1761_UDC USB_KAWETH USB_KC2190 USB_KEENE USB_LAN78XX USB_LCD USB_LD USB_LEDS_TRIGGER_USBPORT USB_LED_TRIG USB_LEGOTOWER USB_LGM_PHY USB_LIBCOMPOSITE USB_LINK_LAYER_TEST USB_M5602 USB_MA901 USB_MAX3420_UDC USB_MAX3421_HCD USB_MDC800 USB_MICROTEK USB_MR800 USB_MSI2500 USB_MUSB_DUAL_ROLE USB_MUSB_HDRC USB_MV_U3D USB_MV_UDC USB_NET2272 USB_NET2272_DMA USB_NET2280 USB_NET_AQC111 USB_NET_AX88179_178A USB_NET_AX8817X USB_NET_CDCETHER USB_NET_CDC_EEM USB_NET_CDC_MBIM USB_NET_CDC_NCM USB_NET_CDC_SUBSET USB_NET_CDC_SUBSET_ENABLE USB_NET_CH9200 USB_NET_CX82310_ETH USB_NET_DM9601 USB_NET_GL620A USB_NET_HUAWEI_CDC_NCM USB_NET_INT51X1 USB_NET_KALMIA USB_NET_MCS7830 USB_NET_NET1080 USB_NET_PLUSB USB_NET_QMI_WWAN USB_NET_RNDIS_HOST USB_NET_SMSC75XX USB_NET_SMSC95XX USB_NET_SR9700 USB_NET_SR9800 USB_NET_ZAURUS USB_OHCI_HCD_PLATFORM USB_OTG USB_OTG_FSM USB_OXU210HP_HCD USB_PEGASUS USB_PULSE8_CEC USB_PWC USB_PWC_INPUT_EVDEV USB_PXA27X USB_R8A66597 USB_R8A66597_HCD USB_RAINSHADOW_CEC USB_RAREMONO USB_RAW_GADGET USB_RTL8150 USB_RTL8152 USB_RTL8153_ECM USB_S2255 USB_SERIAL USB_SERIAL_AIRCABLE USB_SERIAL_ARK3116 USB_SERIAL_BELKIN USB_SERIAL_CH341 USB_SERIAL_CONSOLE USB_SERIAL_CP210X USB_SERIAL_CYBERJACK USB_SERIAL_CYPRESS_M8 USB_SERIAL_DEBUG USB_SERIAL_DIGI_ACCELEPORT USB_SERIAL_EDGEPORT USB_SERIAL_EDGEPORT_TI USB_SERIAL_EMPEG USB_SERIAL_F81232 USB_SERIAL_F8153X USB_SERIAL_FTDI_SIO USB_SERIAL_GARMIN USB_SERIAL_GENERIC USB_SERIAL_IPAQ USB_SERIAL_IPW USB_SERIAL_IR USB_SERIAL_IUU USB_SERIAL_KEYSPAN USB_SERIAL_KEYSPAN_PDA USB_SERIAL_KLSI USB_SERIAL_KOBIL_SCT USB_SERIAL_MCT_U232 USB_SERIAL_METRO USB_SERIAL_MOS7715_PARPORT USB_SERIAL_MOS7720 USB_SERIAL_MOS7840 USB_SERIAL_MXUPORT USB_SERIAL_NAVMAN USB_SERIAL_OMNINET USB_SERIAL_OPTICON USB_SERIAL_OPTION USB_SERIAL_OTI6858 USB_SERIAL_PL2303 USB_SERIAL_QCAUX USB_SERIAL_QT2 USB_SERIAL_QUALCOMM USB_SERIAL_SAFE USB_SERIAL_SIERRAWIRELESS USB_SERIAL_SIMPLE USB_SERIAL_SPCP8X5 USB_SERIAL_SSU100 USB_SERIAL_SYMBOL USB_SERIAL_TI USB_SERIAL_UPD78F0730 USB_SERIAL_VISOR USB_SERIAL_WHITEHEAT USB_SERIAL_WISHBONE USB_SERIAL_WWAN USB_SERIAL_XR USB_SERIAL_XSENS_MT USB_SEVSEG USB_SI470X USB_SI4713 USB_SIERRA_NET USB_SISUSBVGA USB_SL811_CS USB_SL811_HCD USB_SL811_HCD_ISO USB_SNP_CORE USB_SPEEDTOUCH USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_ENE_UB6250 USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_STV06XX USB_TEST USB_TMC USB_TRANCEVIBRATOR USB_UAS USB_UEAGLEATM USB_ULPI_BUS USB_USBNET USB_USS720 USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_VIDEO_CLASS USB_VIDEO_CLASS_INPUT_EVDEV USB_VL600 USB_WDM USB_XHCI_DBGCAP USB_XHCI_PCI_RENESAS USB_XHCI_PLATFORM USB_XUSBATM USB_YUREX USERFAULTFD USERIO USERMODE_DRIVER USER_RETURN_NOTIFIER UVC_COMMON U_SERIAL_CONSOLE V4L2_MEM2MEM_DEV V4L_TEST_DRIVERS VALIDATE_FS_PARSER VDPA VDPA_SIM VDPA_SIM_BLOCK VDPA_SIM_NET VDPA_USER VETH VFIO VFIO_DEVICE_CDEV VFIO_PCI VFIO_PCI_CORE VFIO_PCI_INTX VFIO_PCI_MMAP VFIO_VIRQFD VGASTATE VHOST VHOST_CROSS_ENDIAN_LEGACY VHOST_IOTLB VHOST_NET VHOST_RING VHOST_TASK VHOST_VDPA VHOST_VSOCK VIDEO VIDEOBUF2_CORE VIDEOBUF2_DMA_CONTIG VIDEOBUF2_DMA_SG VIDEOBUF2_MEMOPS VIDEOBUF2_V4L2 VIDEOBUF2_VMALLOC VIDEOMODE_HELPERS VIDEO_AU0828 VIDEO_AU0828_RC VIDEO_AU0828_V4L2 VIDEO_CS53L32A VIDEO_CX231XX VIDEO_CX231XX_ALSA VIDEO_CX231XX_DVB VIDEO_CX231XX_RC VIDEO_CX2341X VIDEO_CX25840 VIDEO_DEV VIDEO_EM28XX VIDEO_EM28XX_ALSA VIDEO_EM28XX_DVB VIDEO_EM28XX_RC VIDEO_EM28XX_V4L2 VIDEO_GO7007 VIDEO_GO7007_LOADER VIDEO_GO7007_USB VIDEO_GO7007_USB_S2250_BOARD VIDEO_HDPVR VIDEO_MSP3400 VIDEO_PVRUSB2 VIDEO_PVRUSB2_DVB VIDEO_PVRUSB2_SYSFS VIDEO_SAA711X VIDEO_STK1160 VIDEO_TUNER VIDEO_TVEEPROM VIDEO_USBTV VIDEO_V4L2_I2C VIDEO_V4L2_SUBDEV_API VIDEO_V4L2_TPG VIDEO_VICODEC VIDEO_VIM2M VIDEO_VIMC VIDEO_VIVID VIDEO_VIVID_CEC VIDEO_WM8775 VIPERBOARD_ADC VIRTIO_BALLOON VIRTIO_DMA_SHARED_BUFFER VIRTIO_MEM VIRTIO_MMIO VIRTIO_MMIO_CMDLINE_DEVICES VIRTIO_PMEM VIRTIO_VDPA VIRTIO_VSOCKETS VIRTIO_VSOCKETS_COMMON VIRT_WIFI VLAN_8021Q VLAN_8021Q_GVRP VLAN_8021Q_MVRP VMAP_PFN VMWARE_VMCI VMXNET3 VP_VDPA VSOCKETS VSOCKETS_DIAG VSOCKETS_LOOPBACK VSOCKMON VT_HW_CONSOLE_BINDING VXFS_FS WANT_DEV_COREDUMP WEXT_CORE WEXT_PRIV WEXT_PROC WIREGUARD WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ADMTEK WLAN_VENDOR_SILABS X86_CMPXCHG64 X86_INTEL_USERCOPY X86_P6_NOP X86_SGX X86_SGX_KVM X86_USER_SHADOW_STACK X86_USE_PPRO_CHECKSUM X86_X32_ABI XDP_SOCKETS XDP_SOCKETS_DIAG XFRM_ESPINTCP XFRM_INTERFACE XFRM_IPCOMP XFRM_MIGRATE XFRM_OFFLOAD XFRM_STATISTICS XFRM_SUB_POLICY XFRM_USER_COMPAT XFS_FS XFS_POSIX_ACL XFS_QUOTA XFS_RT XILLYBUS_CLASS XILLYUSB XOR_BLOCKS YENTA YENTA_ENE_TUNE YENTA_O2 YENTA_RICOH YENTA_TI YENTA_TOSHIBA ZEROPLUS_FF ZLIB_DEFLATE ZONEFS_FS ZPOOL ZRAM ZRAM_DEF_COMP_LZORLE ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_LZO ZSWAP_DEFAULT_ON ZSWAP_SHRINKER_DEFAULT_ON ZSWAP_ZPOOL_DEFAULT_ZSMALLOC] disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing current HEAD 7595b66ae9de667bf35a8c99e8f1bfc4792e207e testing commit 7595b66ae9de667bf35a8c99e8f1bfc4792e207e gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: f3f5c63be2930edf3b2428e9eadf09e6d70c6ec9cbad4cebe0ab245daba9209c all runs: OK false negative chance: 0.000 # git bisect start 7595b66ae9de667bf35a8c99e8f1bfc4792e207e 85652baa895b59b94bea29c77cb9b51cf7120deb Bisecting: 36327 revisions left to test after this (roughly 15 steps) [4e517a6acdc40d61076ead4244b980c276af9b6e] Merge tag 'soc-new-6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc determine whether the revision contains the guilty commit revision 85652baa895b59b94bea29c77cb9b51cf7120deb crashed and is reachable testing commit 4e517a6acdc40d61076ead4244b980c276af9b6e gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 37a5193af85052eb8cc6e70ea4cbb855724b0473c814b16cd9325a757618037a all runs: crashed: INFO: task hung in xfs_buf_item_unpin representative crash: INFO: task hung in xfs_buf_item_unpin, types: [HANG] # git bisect good 4e517a6acdc40d61076ead4244b980c276af9b6e Bisecting: 18164 revisions left to test after this (roughly 14 steps) [91e5bfe317d8f8471fbaa3e70cf66cae1314a516] Merge tag 'dmaengine-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine determine whether the revision contains the guilty commit revision 85652baa895b59b94bea29c77cb9b51cf7120deb crashed and is reachable testing commit 91e5bfe317d8f8471fbaa3e70cf66cae1314a516 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: fdf9e20cad331b8f83a9128cd65ccbc298a5ed4138606eba37efafd3b880e68a all runs: crashed: INFO: task hung in xfs_buf_item_unpin representative crash: INFO: task hung in xfs_buf_item_unpin, types: [HANG] # git bisect good 91e5bfe317d8f8471fbaa3e70cf66cae1314a516 Bisecting: 8851 revisions left to test after this (roughly 13 steps) [b08494a8f7416e5f09907318c5460ad6f6e2a548] Merge tag 'drm-next-2025-05-28' of https://gitlab.freedesktop.org/drm/kernel determine whether the revision contains the guilty commit revision 85652baa895b59b94bea29c77cb9b51cf7120deb crashed and is reachable testing commit b08494a8f7416e5f09907318c5460ad6f6e2a548 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: bb4c4c41252103ec98e9865afd000d946697bee665d7ff47ef735db823b34b21 all runs: OK false negative chance: 0.000 # git bisect bad b08494a8f7416e5f09907318c5460ad6f6e2a548 Bisecting: 4699 revisions left to test after this (roughly 12 steps) [15d90a5e5524532b7456a24f4626cf28c1629c4c] Merge tag 'crc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux determine whether the revision contains the guilty commit revision 85652baa895b59b94bea29c77cb9b51cf7120deb crashed and is reachable testing commit 15d90a5e5524532b7456a24f4626cf28c1629c4c gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 9efac29ee265b5205c6d992e4c6eb1c6f8cf328146c6b253fcba5b8ad606d379 all runs: OK false negative chance: 0.000 # git bisect bad 15d90a5e5524532b7456a24f4626cf28c1629c4c Bisecting: 2306 revisions left to test after this (roughly 11 steps) [0a7bc4d6b04bed1257faf9502f9b4076bac466ea] Merge branch 'bnxt_en-fixes' determine whether the revision contains the guilty commit revision 4e517a6acdc40d61076ead4244b980c276af9b6e crashed and is reachable testing commit 0a7bc4d6b04bed1257faf9502f9b4076bac466ea gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 85fd09acb12bb2a43084a745ef2af89cd2f486bc5f8ca30ecaefcfe655c631db all runs: crashed: INFO: task hung in xfs_buf_item_unpin representative crash: INFO: task hung in xfs_buf_item_unpin, types: [HANG] # git bisect good 0a7bc4d6b04bed1257faf9502f9b4076bac466ea Bisecting: 1153 revisions left to test after this (roughly 10 steps) [ba4ec9a5a018379825f7c6d97910cae2bd14481a] btrfs: use boolean for delalloc argument to btrfs_free_reserved_bytes() determine whether the revision contains the guilty commit revision 0a7bc4d6b04bed1257faf9502f9b4076bac466ea crashed and is reachable testing commit ba4ec9a5a018379825f7c6d97910cae2bd14481a gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 4d6f221337e1c95a464598834562b27eb426835d67b730d8186b1aeceb7d4788 all runs: crashed: INFO: task hung in xfs_buf_item_unpin representative crash: INFO: task hung in xfs_buf_item_unpin, types: [HANG] # git bisect good ba4ec9a5a018379825f7c6d97910cae2bd14481a Bisecting: 578 revisions left to test after this (roughly 9 steps) [3e406741b19890c3d8a2ed126aa7c23b106ca9e1] Merge tag 'vfs-6.16-rc1.selftests' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs determine whether the revision contains the guilty commit revision 0a7bc4d6b04bed1257faf9502f9b4076bac466ea crashed and is reachable testing commit 3e406741b19890c3d8a2ed126aa7c23b106ca9e1 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 7b097c6819838f69c4215a3a0c20fd38e752f2cd23fe2247579331ee718fcd9d all runs: crashed: INFO: task hung in xfs_buf_item_unpin representative crash: INFO: task hung in xfs_buf_item_unpin, types: [HANG] # git bisect good 3e406741b19890c3d8a2ed126aa7c23b106ca9e1 Bisecting: 300 revisions left to test after this (roughly 8 steps) [a56d3133bd875d90ef3237f24e37b75b6d0326a9] Merge tag 'configfs-for-v6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/a.hindborg/linux determine whether the revision contains the guilty commit revision ba4ec9a5a018379825f7c6d97910cae2bd14481a crashed and is reachable testing commit a56d3133bd875d90ef3237f24e37b75b6d0326a9 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: c6e85ba03ce4ee97b8d248d10fdd22928369cfd9d5725767118b047264c77aee all runs: crashed: INFO: task hung in xfs_buf_item_unpin representative crash: INFO: task hung in xfs_buf_item_unpin, types: [HANG] # git bisect good a56d3133bd875d90ef3237f24e37b75b6d0326a9 Bisecting: 150 revisions left to test after this (roughly 7 steps) [7ad7497862a2484333fa6a054aeab11a9b2f979b] bcachefs: add missing locking in bch2_write_point_to_text() determine whether the revision contains the guilty commit revision 4e517a6acdc40d61076ead4244b980c276af9b6e crashed and is reachable testing commit 7ad7497862a2484333fa6a054aeab11a9b2f979b gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: f97ee71d85b9eb1e3c8dd4eaecd421851ffd3c53ac9d7ef0533d944222ea4c34 all runs: crashed: INFO: task hung in xfs_buf_item_unpin representative crash: INFO: task hung in xfs_buf_item_unpin, types: [HANG] # git bisect good 7ad7497862a2484333fa6a054aeab11a9b2f979b Bisecting: 82 revisions left to test after this (roughly 6 steps) [9caea9208fc3fbdbd4a41a2de8c6a0c969b030f9] bcachefs: Don't mount bs > ps without TRANSPARENT_HUGEPAGE determine whether the revision contains the guilty commit revision 7ad7497862a2484333fa6a054aeab11a9b2f979b crashed and is reachable testing commit 9caea9208fc3fbdbd4a41a2de8c6a0c969b030f9 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 4a1061795205dd122c23de63590974a39969582da31550c0c0f7dba878f8b827 all runs: crashed: INFO: task hung in xfs_buf_item_unpin representative crash: INFO: task hung in xfs_buf_item_unpin, types: [HANG] # git bisect good 9caea9208fc3fbdbd4a41a2de8c6a0c969b030f9 Bisecting: 49 revisions left to test after this (roughly 5 steps) [79b98edf918e8146047e08817e2a42937428be02] Merge tag 'erofs-for-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs determine whether the revision contains the guilty commit revision 9caea9208fc3fbdbd4a41a2de8c6a0c969b030f9 crashed and is reachable testing commit 79b98edf918e8146047e08817e2a42937428be02 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: e43f36d30ed6da4248307af90b301f7138fbad89d29c573ce3e9a686c4c600bf all runs: crashed: INFO: task hung in xfs_buf_item_unpin representative crash: INFO: task hung in xfs_buf_item_unpin, types: [HANG] # git bisect good 79b98edf918e8146047e08817e2a42937428be02 Bisecting: 23 revisions left to test after this (roughly 5 steps) [6e7d71b3a0f9732863b6a1366c9d875cec52c842] Merge branch 'atomic_writes-6.16' into xfs-6.16-merge determine whether the revision contains the guilty commit revision 85652baa895b59b94bea29c77cb9b51cf7120deb crashed and is reachable testing commit 6e7d71b3a0f9732863b6a1366c9d875cec52c842 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: d1e266731cd3f81c100ea7247868004e86bde204d019eef07aa2cee84c127c99 all runs: OK false negative chance: 0.000 # git bisect bad 6e7d71b3a0f9732863b6a1366c9d875cec52c842 Bisecting: 12 revisions left to test after this (roughly 4 steps) [0ea88ed47bb1912377975f310da10183e0f6c5bb] xfs: refine atomic write size check in xfs_file_write_iter() determine whether the revision contains the guilty commit revision 91e5bfe317d8f8471fbaa3e70cf66cae1314a516 crashed and is reachable testing commit 0ea88ed47bb1912377975f310da10183e0f6c5bb gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 6919c96fec37ff47be037a3357586ae36c81da1c06264cf5a49cf8b0cfc21af2 all runs: crashed: INFO: task hung in xfs_buf_item_unpin representative crash: INFO: task hung in xfs_buf_item_unpin, types: [HANG] # git bisect good 0ea88ed47bb1912377975f310da10183e0f6c5bb Bisecting: 6 revisions left to test after this (roughly 3 steps) [9dffc58f23849783ab2f6c2c9f5af9b94a42666f] xfs: update atomic write limits determine whether the revision contains the guilty commit revision 91e5bfe317d8f8471fbaa3e70cf66cae1314a516 crashed and is reachable testing commit 9dffc58f23849783ab2f6c2c9f5af9b94a42666f gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 5a5ed9f766b0e34693674bed6b20a46fdbe871af1ff9e18267efa1d86b681256 all runs: OK false negative chance: 0.000 # git bisect bad 9dffc58f23849783ab2f6c2c9f5af9b94a42666f Bisecting: 2 revisions left to test after this (roughly 2 steps) [b1e09178b73adf10dc87fba9aee7787a7ad26874] xfs: commit CoW-based atomic writes atomically determine whether the revision contains the guilty commit revision 91e5bfe317d8f8471fbaa3e70cf66cae1314a516 crashed and is reachable testing commit b1e09178b73adf10dc87fba9aee7787a7ad26874 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 0d43cc8ebadd712dcafc64fc2cbb922ff978999b1478665058250b2f7261b3d4 all runs: OK false negative chance: 0.000 # git bisect bad b1e09178b73adf10dc87fba9aee7787a7ad26874 Bisecting: 0 revisions left to test after this (roughly 1 step) [11ab31909d7cc177fab981cd0d6822a570244599] xfs: add large atomic writes checks in xfs_direct_write_iomap_begin() determine whether the revision contains the guilty commit revision 91e5bfe317d8f8471fbaa3e70cf66cae1314a516 crashed and is reachable testing commit 11ab31909d7cc177fab981cd0d6822a570244599 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: b500e4bbe3c441fbd994ea7f43aaec53ff59f211a2d980fef26c7bee2b90315f all runs: crashed: INFO: task hung in xfs_buf_item_unpin representative crash: INFO: task hung in xfs_buf_item_unpin, types: [HANG] # git bisect good 11ab31909d7cc177fab981cd0d6822a570244599 b1e09178b73adf10dc87fba9aee7787a7ad26874 is the first bad commit commit b1e09178b73adf10dc87fba9aee7787a7ad26874 Author: John Garry Date: Wed May 7 14:18:31 2025 -0700 xfs: commit CoW-based atomic writes atomically When completing a CoW-based write, each extent range mapping update is covered by a separate transaction. For a CoW-based atomic write, all mappings must be changed at once, so change to use a single transaction. Note that there is a limit on the amount of log intent items which can be fit into a single transaction, but this is being ignored for now since the count of items for a typical atomic write would be much less than is typically supported. A typical atomic write would be expected to be 64KB or less, which means only 16 possible extents unmaps, which is quite small. Reviewed-by: Darrick J. Wong [djwong: add tr_atomic_ioend] Reviewed-by: Christoph Hellwig Signed-off-by: Darrick J. Wong Signed-off-by: John Garry fs/xfs/libxfs/xfs_log_rlimit.c | 4 +++ fs/xfs/libxfs/xfs_trans_resv.c | 15 +++++++++++ fs/xfs/libxfs/xfs_trans_resv.h | 1 + fs/xfs/xfs_file.c | 5 +++- fs/xfs/xfs_reflink.c | 56 ++++++++++++++++++++++++++++++++++++++++++ fs/xfs/xfs_reflink.h | 2 ++ 6 files changed, 82 insertions(+), 1 deletion(-) accumulated error probability: 0.00 culprit signature: 0d43cc8ebadd712dcafc64fc2cbb922ff978999b1478665058250b2f7261b3d4 parent signature: b500e4bbe3c441fbd994ea7f43aaec53ff59f211a2d980fef26c7bee2b90315f revisions tested: 24, total time: 7h36m16.717987045s (build: 3h16m9.033446281s, test: 3h58m24.230913263s) first good commit: b1e09178b73adf10dc87fba9aee7787a7ad26874 xfs: commit CoW-based atomic writes atomically recipients (to): ["djwong@kernel.org" "hch@lst.de" "john.g.garry@oracle.com"] recipients (cc): []