ci starts bisection 2025-09-24 08:10:06.082449502 +0000 UTC m=+43623.895457059 bisecting cause commit starting from ce7f1a983b074f6cf8609068088ca3182c569ee4 building syzkaller on 0abd06914a0618dff2f4b80e8d3c0bfb50121eb1 ensuring issue is reproducible on original commit ce7f1a983b074f6cf8609068088ca3182c569ee4 testing commit ce7f1a983b074f6cf8609068088ca3182c569ee4 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 8c8b8d7f85ea0f93d18f996802b80c73dc9438bfe19b20b29c09c62c55a9de31 all runs: crashed: WARNING: bad unlock balance in namespace_unlock representative crash: WARNING: bad unlock balance in namespace_unlock, types: [LOCKDEP] check whether we can drop unnecessary instrumentation disabling configs for [hang memleak ubsan bug_or_warning kasan atomic_sleep], they are not needed testing commit ce7f1a983b074f6cf8609068088ca3182c569ee4 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 295568e4d0a8a8dfd4b5e12720c3c669896f3999b2102c8f300d7837edd91104 run #0: crashed: WARNING: bad unlock balance in namespace_unlock run #1: crashed: WARNING: bad unlock balance in namespace_unlock run #2: crashed: WARNING: bad unlock balance in namespace_unlock run #3: crashed: WARNING: bad unlock balance in namespace_unlock run #4: crashed: WARNING: bad unlock balance in copy_process run #5: crashed: WARNING: bad unlock balance in namespace_unlock run #6: crashed: WARNING: bad unlock balance in namespace_unlock run #7: crashed: WARNING: bad unlock balance in namespace_unlock run #8: crashed: WARNING: bad unlock balance in namespace_unlock run #9: OK representative crash: WARNING: bad unlock balance in namespace_unlock, types: [LOCKDEP] the bug reproduces without the instrumentation disabling configs for [memleak ubsan bug_or_warning kasan atomic_sleep hang], they are not needed kconfig minimization: base=4099 full=8527 leaves diff=2182 split chunks (needed=false): <2182> split chunk #0 of len 2182 into 5 parts testing without sub-chunk 1/5 disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed testing commit ce7f1a983b074f6cf8609068088ca3182c569ee4 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 04f367c3bb240705f08c50bb272cc76c5eb704faf2da91f7c60bd47cbabe2bbd all runs: crashed: WARNING: bad unlock balance in namespace_unlock representative crash: WARNING: bad unlock balance in namespace_unlock, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [kasan atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit ce7f1a983b074f6cf8609068088ca3182c569ee4 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 3459fbf3065e83114ef8c9961a66f40747b48b535c0d454f0fc5e95d31b95cc7 run #0: crashed: WARNING: bad unlock balance in namespace_unlock run #1: crashed: WARNING: bad unlock balance in namespace_unlock run #2: crashed: WARNING: bad unlock balance in namespace_unlock run #3: crashed: WARNING: bad unlock balance in namespace_unlock run #4: crashed: WARNING: bad unlock balance in namespace_unlock run #5: crashed: WARNING: bad unlock balance in namespace_unlock run #6: crashed: WARNING: bad unlock balance in namespace_unlock run #7: crashed: WARNING: bad unlock balance in namespace_unlock run #8: crashed: WARNING: bad unlock balance in namespace_unlock run #9: OK representative crash: WARNING: bad unlock balance in namespace_unlock, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [memleak ubsan bug_or_warning kasan atomic_sleep hang], they are not needed testing commit ce7f1a983b074f6cf8609068088ca3182c569ee4 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 465f5c13b0c078e18eda0e4991cc86378f29242c36c9e443c7a39a74e4433430 run #0: crashed: WARNING: bad unlock balance in copy_process run #1: crashed: WARNING: bad unlock balance in namespace_unlock run #2: crashed: WARNING: bad unlock balance in namespace_unlock run #3: crashed: WARNING: bad unlock balance in copy_process run #4: crashed: WARNING: bad unlock balance in namespace_unlock run #5: crashed: WARNING: bad unlock balance in namespace_unlock run #6: crashed: WARNING: bad unlock balance in namespace_unlock run #7: crashed: WARNING: bad unlock balance in namespace_unlock run #8: crashed: WARNING: bad unlock balance in namespace_unlock run #9: crashed: WARNING: bad unlock balance in namespace_unlock representative crash: WARNING: bad unlock balance in copy_process, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [ubsan bug_or_warning kasan atomic_sleep hang memleak], they are not needed testing commit ce7f1a983b074f6cf8609068088ca3182c569ee4 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: fc699fcf2ecef8ec3c89e4b28cb6cd682f11841e6197435eea253c92596db564 run #0: ignore: lost connection to test machine run #1: ignore: lost connection to test machine run #2: ignore: lost connection to test machine run #3: crashed: WARNING: bad unlock balance in namespace_unlock run #4: crashed: WARNING: bad unlock balance in namespace_unlock run #5: crashed: WARNING: bad unlock balance in namespace_unlock run #6: crashed: WARNING: bad unlock balance in namespace_unlock run #7: crashed: WARNING: bad unlock balance in namespace_unlock run #8: crashed: WARNING: bad unlock balance in namespace_unlock run #9: crashed: WARNING: bad unlock balance in namespace_unlock representative crash: WARNING: bad unlock balance in namespace_unlock, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [hang memleak ubsan bug_or_warning kasan atomic_sleep], they are not needed testing commit ce7f1a983b074f6cf8609068088ca3182c569ee4 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5df9c2bacbb8474b8e88bda590a154b149646371aa737420b7e3fb143e199ad6 all runs: OK false negative chance: 0.000 minimized to 434 configs; suspects: [ARCH_ENABLE_MEMORY_HOTREMOVE ATM BCMA BLK_DEV_ZONED BPF_SYSCALL CARDBUS CFG80211 CFG80211_WEXT CMA COMMON_CLK CONTIG_ALLOC DVB_CORE EXTCON GPIOLIB HID_ZEROPLUS I2C_MUX IIO IOMMUFD IRQ_REMAP KVM KVM_INTEL LIBNVDIMM 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_ALI_M5632 USB_AMD5536UDC USB_AN2720 USB_APPLEDISPLAY USB_ARMLINUX USB_ATM USB_BDC_UDC USB_BELKIN USB_C67X00_HCD USB_CATC USB_CDC_PHONET USB_CDNS2_UDC USB_CDNS3 USB_CDNS3_GADGET USB_CDNS3_HOST 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_GENERIC_PLAT 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 USB_F_PHONET USB_F_PRINTER USB_F_RNDIS USB_F_SERIAL USB_F_SS_LB USB_F_SUBSET USB_F_TCM USB_F_UAC1 USB_F_UAC1_LEGACY USB_F_UAC2 USB_F_UVC USB_GADGET USB_GADGETFS USB_GADGET_DEBUG_FILES USB_GADGET_DEBUG_FS USB_GL860 USB_GOKU USB_GR_UDC USB_GSPCA USB_GSPCA_BENQ USB_GSPCA_CONEX USB_GSPCA_CPIA1 USB_GSPCA_DTCS033 USB_GSPCA_ETOMS USB_GSPCA_FINEPIX USB_GSPCA_JEILINJ USB_GSPCA_JL2005BCD USB_GSPCA_KINECT USB_GSPCA_KONICA USB_GSPCA_MARS USB_GSPCA_MR97310A USB_GSPCA_NW80X USB_GSPCA_OV519 USB_GSPCA_OV534 USB_GSPCA_OV534_9 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USB_MR800 USB_MSI2500 USB_MUSB_DUAL_ROLE USB_MUSB_HDRC 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 USER_RETURN_NOTIFIER UVC_COMMON U_SERIAL_CONSOLE V4L2_ASYNC V4L2_FWNODE V4L2_MEM2MEM_DEV V4L_TEST_DRIVERS VALIDATE_FS_PARSER VDPA VDPA_SIM VDPA_SIM_BLOCK VDPA_SIM_NET VETH VFIO VFIO_DEVICE_CDEV VFIO_PCI VFIO_PCI_CORE VFIO_PCI_INTX VFIO_VIRQFD VGASTATE VHOST VHOST_CROSS_ENDIAN_LEGACY VHOST_ENABLE_FORK_OWNER_CONTROL 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_CAMERA_LENS 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 VIRT_XFER_TO_GUEST_WORK 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_PROC WIREGUARD WIRELESS WLAN WLAN_VENDOR_ADMTEK WLAN_VENDOR_SILABS X86_FRED X86_SGX X86_SGX_KVM X86_USER_SHADOW_STACK 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 ZRAM ZRAM_BACKEND_FORCE_LZO ZRAM_BACKEND_LZO ZRAM_DEF_COMP_LZO ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_842 ZSWAP_DEFAULT_ON ZSWAP_SHRINKER_DEFAULT_ON] disabling configs for [hang memleak ubsan bug_or_warning kasan atomic_sleep], they are not needed picked [v6.16 v6.15 v6.14 v6.12 v6.10 v6.8 v6.6 v6.4 v6.1 v5.18 v5.15 v5.12 v5.9 v5.6 v5.3 v5.0 v4.19] out of 39 release tags testing release v6.16 testing commit 038d61fd642278bab63ee8ef722c50d10ab01e8f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 7110386d9465e72d29def9ac4dd3ca1120a8ba5d4e023d24a3e3a602275b7718 run #0: ignore: lost connection to test machine run #1: ignore: lost connection to test machine run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK false negative chance: 0.000 # git bisect start ce7f1a983b074f6cf8609068088ca3182c569ee4 038d61fd642278bab63ee8ef722c50d10ab01e8f Bisecting: 13004 revisions left to test after this (roughly 14 steps) [6e8e6baf16ce7d2310959ae81d0194a56874e0d2] Merge branch 'net-dsa-lantiq_gswip-prepare-for-supporting-new-features' testing commit 6e8e6baf16ce7d2310959ae81d0194a56874e0d2 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 9a3b2ff12b86504598fc96427857244df69e5e4b04b014188589d50cb2f4f2a5 all runs: OK false negative chance: 0.000 # git bisect good 6e8e6baf16ce7d2310959ae81d0194a56874e0d2 Bisecting: 6786 revisions left to test after this (roughly 13 steps) [6f65ec5d526b3bfb137df077b637cb477fe16768] Merge branch 'for-next' of https://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git testing commit 6f65ec5d526b3bfb137df077b637cb477fe16768 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: aa22f8c4694d465981068d8eee3c6147a90083eb0d54c5dbd4231d80cbb266d2 run #0: ignore: lost connection to test machine run #1: ignore: lost connection to test machine run #2: crashed: WARNING: bad unlock balance in namespace_unlock run #3: crashed: WARNING: bad unlock balance in namespace_unlock run #4: crashed: WARNING: bad unlock balance in copy_process run #5: crashed: WARNING: bad unlock balance in namespace_unlock run #6: crashed: WARNING: bad unlock balance in namespace_unlock run #7: crashed: WARNING: bad unlock balance in namespace_unlock run #8: crashed: WARNING: bad unlock balance in namespace_unlock run #9: crashed: WARNING: bad unlock balance in namespace_unlock representative crash: WARNING: bad unlock balance in namespace_unlock, types: [LOCKDEP] # git bisect bad 6f65ec5d526b3bfb137df077b637cb477fe16768 Bisecting: 3243 revisions left to test after this (roughly 12 steps) [1e8b69f0b5e7c3fe01228423edfc1e00f02726df] Merge branch 'for-next/core' of https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux testing commit 1e8b69f0b5e7c3fe01228423edfc1e00f02726df gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5fa6f93aab1528f59ad321228df24ce9d4299e8c7112e71ba655d0f4b0dfc919 all runs: crashed: WARNING: bad unlock balance in namespace_unlock representative crash: WARNING: bad unlock balance in namespace_unlock, types: [LOCKDEP] # git bisect bad 1e8b69f0b5e7c3fe01228423edfc1e00f02726df Bisecting: 1488 revisions left to test after this (roughly 11 steps) [6c15463c4511d26f2a820f63f5b76624a71afc44] sunrpc: fix "occurence"->"occurrence" testing commit 6c15463c4511d26f2a820f63f5b76624a71afc44 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: f0cc3c0439eec9ef5f1b69a8c0aade4e4d8f2e764fbee8de1f9bf80c276956d7 run #0: crashed: WARNING: bad unlock balance in copy_process 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 representative crash: WARNING: bad unlock balance in copy_process, types: [LOCKDEP] unable to determine the verdict: 9 good runs (wanted 5), for bad wanted 5 in total, got 10 # git bisect skip 6c15463c4511d26f2a820f63f5b76624a71afc44 Bisecting: 1488 revisions left to test after this (roughly 11 steps) [afd58777de7f87c5f6a430c281907f0a66fd08ab] Merge tag 'mmc-v6.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc testing commit afd58777de7f87c5f6a430c281907f0a66fd08ab gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 439d1d7373921397f3040cbe1e3c3422ef1fb4d912629313139a4a8d301a7cfd all runs: OK false negative chance: 0.000 # git bisect good afd58777de7f87c5f6a430c281907f0a66fd08ab Bisecting: 1417 revisions left to test after this (roughly 11 steps) [a4c4a4b294ab6668b9f203c94ad2e0a10441ec2f] Merge branch 'for-next' of https://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git testing commit a4c4a4b294ab6668b9f203c94ad2e0a10441ec2f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 75f1c21e38af571e4cea48f23905cfc390221b70d2537fda8e8f6b6944eb525a all runs: OK false negative chance: 0.000 # git bisect good a4c4a4b294ab6668b9f203c94ad2e0a10441ec2f Bisecting: 729 revisions left to test after this (roughly 10 steps) [c36ebe899944f56beedb52d021940725029efbcf] Merge branch 'for-linux-next-fixes' of https://gitlab.freedesktop.org/drm/misc/kernel.git testing commit c36ebe899944f56beedb52d021940725029efbcf gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 4cd5445d7c1e00fd62f15f9126c49560b4c4679a81558e1b7db5f187eba781cd run #0: crashed: WARNING: bad unlock balance in namespace_unlock run #1: crashed: WARNING: bad unlock balance in namespace_unlock run #2: crashed: WARNING: bad unlock balance in namespace_unlock run #3: crashed: WARNING: bad unlock balance in namespace_unlock run #4: crashed: WARNING: bad unlock balance in namespace_unlock run #5: crashed: WARNING: bad unlock balance in namespace_unlock run #6: crashed: WARNING: bad unlock balance in namespace_unlock run #7: crashed: WARNING: bad unlock balance in namespace_unlock run #8: OK run #9: crashed: WARNING: bad unlock balance in namespace_unlock representative crash: WARNING: bad unlock balance in namespace_unlock, types: [LOCKDEP] # git bisect bad c36ebe899944f56beedb52d021940725029efbcf Bisecting: 414 revisions left to test after this (roughly 9 steps) [6ccbcf1d9af36bf01f4b735de010e3263d24a825] Merge branch 'for-next' of https://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs.git testing commit 6ccbcf1d9af36bf01f4b735de010e3263d24a825 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: c424d842b62614d71070b8944cc0b503b6637632a0a22d497f977a82f8d3a74a run #0: crashed: WARNING: bad unlock balance in copy_process run #1: crashed: WARNING: bad unlock balance in copy_process 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: bad unlock balance in copy_process, types: [LOCKDEP] # git bisect bad 6ccbcf1d9af36bf01f4b735de010e3263d24a825 Bisecting: 130 revisions left to test after this (roughly 7 steps) [50d9bbfabcdf56374c6638a7ce2fd0bcd319ed4e] Merge branch 'for-next' of https://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git testing commit 50d9bbfabcdf56374c6638a7ce2fd0bcd319ed4e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 64bcf1a060da618d50e588c7839c8b3ea826600a01b110ab498f009b0ffe9f07 run #0: crashed: WARNING: bad unlock balance in copy_process 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 representative crash: WARNING: bad unlock balance in copy_process, types: [LOCKDEP] unable to determine the verdict: 19 good runs (wanted 15), for bad wanted 10 in total, got 20 # git bisect skip 50d9bbfabcdf56374c6638a7ce2fd0bcd319ed4e Bisecting: 130 revisions left to test after this (roughly 7 steps) [a082e4b4d08a4a0e656d90c2c05da85f23e6d0c9] nfsd: nfserr_jukebox in nlm_fopen should lead to a retry testing commit a082e4b4d08a4a0e656d90c2c05da85f23e6d0c9 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 297633054cf74298d5ab4d70e4a6fb3f3cb577902d93b92956557f0be6a58ba5 run #0: crashed: WARNING: bad unlock balance in copy_process 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 representative crash: WARNING: bad unlock balance in copy_process, types: [LOCKDEP] unable to determine the verdict: 19 good runs (wanted 15), for bad wanted 10 in total, got 20 # git bisect skip a082e4b4d08a4a0e656d90c2c05da85f23e6d0c9 Bisecting: 130 revisions left to test after this (roughly 7 steps) [80e08ad242185c787e862873532249f4c12a7afb] ovl: Set case-insensitive dentry operations for ovl sb testing commit 80e08ad242185c787e862873532249f4c12a7afb gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 6f2d000f2de24f25621039f730288039df8fc3ec369b35727a2fa1e864bd2f20 all runs: OK false negative chance: 0.000 # git bisect good 80e08ad242185c787e862873532249f4c12a7afb Bisecting: 124 revisions left to test after this (roughly 7 steps) [cd718046646593ced5ad98f9cde22aaf2a2eb8f2] gfs2: Do not use atomic operations unnecessarily testing commit cd718046646593ced5ad98f9cde22aaf2a2eb8f2 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 977ed6b82a40b5e8d70cca81a9c91807e2257f770abd9ec1225eb28fa6a33813 all runs: OK false negative chance: 0.000 # git bisect good cd718046646593ced5ad98f9cde22aaf2a2eb8f2 Bisecting: 124 revisions left to test after this (roughly 7 steps) [dcc37b9169457624f54b170356dd76fb57b21317] Merge branch 'jfs-next' of https://github.com/kleikamp/linux-shaggy.git testing commit dcc37b9169457624f54b170356dd76fb57b21317 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 561655e807de675b19be70a6b56bb52169de0a7d86eb1781322761c935b3d350 all runs: OK false negative chance: 0.000 # git bisect good dcc37b9169457624f54b170356dd76fb57b21317 Bisecting: 62 revisions left to test after this (roughly 6 steps) [070bdf83f3b578cfb7c55d6743c31fec9b1c4bb8] Merge branch 'overlayfs-next' of https://git.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs.git testing commit 070bdf83f3b578cfb7c55d6743c31fec9b1c4bb8 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: b08735dfa3b44cb678e58eaa4ab16dae789bef5d238aab2ed0a6e1b53e573b52 run #0: crashed: WARNING: bad unlock balance in copy_process run #1: crashed: WARNING: bad unlock balance in copy_process run #2: crashed: WARNING: bad unlock balance in copy_process 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 representative crash: WARNING: bad unlock balance in copy_process, types: [LOCKDEP] # git bisect bad 070bdf83f3b578cfb7c55d6743c31fec9b1c4bb8 Bisecting: 27 revisions left to test after this (roughly 5 steps) [898374fdd7f06fa4c4a66e8be3135efeae6128d5] nfsd: unregister with rpcbind when deleting a transport testing commit 898374fdd7f06fa4c4a66e8be3135efeae6128d5 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 323f22966b750c76545008747d8ddb605529fff9fbfdb51b99bf59bb102593ba all runs: OK false negative chance: 0.000 # git bisect good 898374fdd7f06fa4c4a66e8be3135efeae6128d5 Bisecting: 16 revisions left to test after this (roughly 4 steps) [7cf15b155646cbbf9944050c7d5f26f1eb4876e0] Merge branch 'nfsd-next' of https://git.kernel.org/pub/scm/linux/kernel/git/cel/linux testing commit 7cf15b155646cbbf9944050c7d5f26f1eb4876e0 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0060156292ccc1479e125c5a48fa8e5ad20b7db2a0d5df9297e4d87102784f56 all runs: OK false negative chance: 0.000 # git bisect good 7cf15b155646cbbf9944050c7d5f26f1eb4876e0 Bisecting: 8 revisions left to test after this (roughly 3 steps) [7d460636b6402343ca150682f7bae896c4ff2a76] ntfs3: stop using write_cache_pages testing commit 7d460636b6402343ca150682f7bae896c4ff2a76 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 385d9d34a1f2b95f27c34cf867d2bcad74203e83c633f79113e4fdb7ec7255bf all runs: OK false negative chance: 0.000 # git bisect good 7d460636b6402343ca150682f7bae896c4ff2a76 Bisecting: 4 revisions left to test after this (roughly 2 steps) [5031db99847368c69df656ffe0907084516ed7c3] Merge branch 'for-next' of https://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux.git testing commit 5031db99847368c69df656ffe0907084516ed7c3 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0221eafb95294df11387db0d5b8c9b07789932a7b354150c11cd873d6a8d75a5 all runs: OK false negative chance: 0.000 # git bisect good 5031db99847368c69df656ffe0907084516ed7c3 Bisecting: 1 revision left to test after this (roughly 1 step) [a80ca3bfdde179d67d684c55bc52092e447fd871] ovl: Support mounting case-insensitive enabled layers testing commit a80ca3bfdde179d67d684c55bc52092e447fd871 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 64e195bd709fa8ffdd47566ac2fd0fbf811c559edcdf3f3cc91b8e681384f192 all runs: OK false negative chance: 0.000 # git bisect good a80ca3bfdde179d67d684c55bc52092e447fd871 Bisecting: 0 revisions left to test after this (roughly 0 steps) [e98d6b6b9e258a6a4d6e8d9f7295a65c74cc8a73] ovl: make sure that ovl_create_real() returns a hashed dentry testing commit e98d6b6b9e258a6a4d6e8d9f7295a65c74cc8a73 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: f85581c9963d2b26dfb5d33066864010895a2fed8117d423fd9c5a3aff6103d6 all runs: OK false negative chance: 0.000 # git bisect good e98d6b6b9e258a6a4d6e8d9f7295a65c74cc8a73 070bdf83f3b578cfb7c55d6743c31fec9b1c4bb8 is the first bad commit commit 070bdf83f3b578cfb7c55d6743c31fec9b1c4bb8 Merge: 5031db9984736 e98d6b6b9e258 Author: Mark Brown Date: Tue Sep 23 13:48:36 2025 +0200 Merge branch 'overlayfs-next' of https://git.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs.git fs/overlayfs/copy_up.c | 2 +- fs/overlayfs/dir.c | 29 ++++++++++- fs/overlayfs/inode.c | 1 + fs/overlayfs/namei.c | 17 ++++--- fs/overlayfs/overlayfs.h | 8 +-- fs/overlayfs/ovl_entry.h | 1 + fs/overlayfs/params.c | 15 ++++-- fs/overlayfs/params.h | 1 + fs/overlayfs/readdir.c | 126 +++++++++++++++++++++++++++++++++++++++-------- fs/overlayfs/super.c | 64 +++++++++++++++++++++++- fs/overlayfs/util.c | 6 +-- include/linux/fs.h | 27 +++++++++- 12 files changed, 254 insertions(+), 43 deletions(-) accumulated error probability: 0.00 reproducer is flaky (0.36 repro chance estimate) revisions tested: 28, total time: 10h24m9.051144543s (build: 4h16m12.75801828s, test: 5h24m46.992234346s) first bad commit: 070bdf83f3b578cfb7c55d6743c31fec9b1c4bb8 Merge branch 'overlayfs-next' of https://git.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs.git recipients (to): ["broonie@kernel.org"] recipients (cc): [] crash: WARNING: bad unlock balance in copy_process ===================================== WARNING: bad unlock balance detected! syzkaller #0 Not tainted ------------------------------------- syz.5.2624/15192 is trying to release lock (&sighand->siglock) at: [] spin_unlock include/linux/spinlock.h:391 [inline] [] copy_process+0x105f/0x1310 kernel/fork.c:2432 but there are no more locks to release! other info that might help us debug this: 1 lock held by syz.5.2624/15192: #0: ffffffff8379cf48 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: copy_process+0xb05/0x1310 kernel/fork.c:2274 stack backtrace: CPU: 0 UID: 0 PID: 15192 Comm: syz.5.2624 Not tainted syzkaller #0 PREEMPT(none) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Call Trace: dump_stack_lvl+0xad/0x110 lib/dump_stack.c:120 print_unlock_imbalance_bug+0xdc/0xf0 kernel/locking/lockdep.c:5298 __lock_release kernel/locking/lockdep.c:5537 [inline] lock_release+0x1fe/0x2f0 kernel/locking/lockdep.c:5889 __raw_spin_unlock include/linux/spinlock_api_smp.h:141 [inline] _raw_spin_unlock+0x16/0x50 kernel/locking/spinlock.c:186 spin_unlock include/linux/spinlock.h:391 [inline] copy_process+0x105f/0x1310 kernel/fork.c:2432 kernel_clone+0xf6/0x390 kernel/fork.c:2605 __do_sys_clone3 kernel/fork.c:2909 [inline] __se_sys_clone3+0x1c9/0x1e0 kernel/fork.c:2888 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xa6/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f581c473609 Code: d7 08 00 48 8d 3d 9c d7 08 00 e8 e2 28 f6 ff 66 90 b8 ea ff ff ff 48 85 ff 74 2c 48 85 d2 74 27 49 89 c8 b8 b3 01 00 00 0f 05 <48> 85 c0 7c 18 74 01 c3 31 ed 48 83 e4 f0 4c 89 c7 ff d2 48 89 c7 RSP: 002b:00007ffcac960908 EFLAGS: 00000206 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f581c3f59f0 RCX: 00007f581c473609 RDX: 00007f581c3f59f0 RSI: 0000000000000058 RDI: 00007ffcac960950 RBP: 00007f581c2af6c0 R08: 00007f581c2af6c0 R09: 00007ffcac960a37 R10: 0000000000000008 R11: 0000000000000206 R12: ffffffffffffffa8 R13: 000000000000000b R14: 00007ffcac960950 R15: 00007ffcac960a38