ci2 starts bisection 2025-11-26 16:52:46.033716756 +0000 UTC m=+12178.210839823 bisecting cause commit starting from 30f09200cc4aefbd8385b01e41bde2e4565a6f0e building syzkaller on 64219f1537429ca826770c4d6f3d49ee6964d16c ensuring issue is reproducible on original commit 30f09200cc4aefbd8385b01e41bde2e4565a6f0e testing commit 30f09200cc4aefbd8385b01e41bde2e4565a6f0e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 8bf05ed850dbbc3d181f74802b1e62b46dff0d662776a455ce893135595aec3c run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: crashed: WARNING in shmem_unlink run #3: crashed: WARNING in shmem_unlink run #4: crashed: WARNING in shmem_unlink run #5: crashed: WARNING in shmem_unlink run #6: crashed: WARNING in shmem_unlink run #7: crashed: WARNING in shmem_unlink run #8: crashed: WARNING in shmem_unlink run #9: crashed: WARNING in shmem_unlink run #10: crashed: WARNING in shmem_unlink run #11: crashed: WARNING in shmem_unlink run #12: crashed: WARNING in shmem_unlink run #13: crashed: WARNING in shmem_unlink run #14: crashed: WARNING in shmem_unlink run #15: crashed: WARNING in shmem_unlink run #16: crashed: WARNING in shmem_unlink run #17: crashed: WARNING in shmem_unlink run #18: crashed: WARNING in shmem_unlink run #19: crashed: WARNING in shmem_unlink representative crash: WARNING in shmem_unlink, types: [WARNING] check whether we can drop unnecessary instrumentation disabling configs for [ubsan kasan locking atomic_sleep hang memleak], they are not needed testing commit 30f09200cc4aefbd8385b01e41bde2e4565a6f0e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: dad3cc33369ac51082cf416b4fe20381da1f576a0a4e538b79fe5081d930da6e run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: crashed: WARNING in shmem_unlink run #6: crashed: WARNING in shmem_unlink run #7: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor855087470" "root@10.128.0.245:./syz-executor855087470"]: exit status 255 run #8: OK run #9: OK representative crash: WARNING in shmem_unlink, types: [WARNING] unable to determine the verdict: 2 good runs (wanted 5), for bad wanted 5 in total, got 4 kconfig minimization: base=4109 full=8337 leaves diff=2119 split chunks (needed=false): <2119> split chunk #0 of len 2119 into 5 parts testing without sub-chunk 1/5 testing commit 30f09200cc4aefbd8385b01e41bde2e4565a6f0e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: b8fde2d769ea3c0f09915d5436466d72c7cef08a2c2283d2ae2c167893a2e590 all runs: crashed: WARNING in shmem_unlink representative crash: WARNING in shmem_unlink, types: [WARNING] the chunk can be dropped testing without sub-chunk 2/5 testing commit 30f09200cc4aefbd8385b01e41bde2e4565a6f0e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 9628e3904d4370c033291a861b26464b4ce9d7d505e566e0c00e647f1a92da43 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: crashed: WARNING in shmem_unlink run #4: crashed: WARNING in shmem_unlink run #5: crashed: WARNING in shmem_unlink run #6: crashed: WARNING in shmem_unlink run #7: crashed: WARNING in shmem_unlink run #8: crashed: WARNING in shmem_unlink run #9: crashed: WARNING in shmem_unlink representative crash: WARNING in shmem_unlink, types: [WARNING] the chunk can be dropped testing without sub-chunk 3/5 testing commit 30f09200cc4aefbd8385b01e41bde2e4565a6f0e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 70418414d0598ae6e3573e5485f42c525becd7cdf93732c586fc4573c05558b2 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: crashed: WARNING in shmem_unlink run #5: crashed: WARNING in shmem_unlink run #6: crashed: WARNING in shmem_unlink run #7: crashed: WARNING in shmem_unlink run #8: crashed: WARNING in shmem_unlink run #9: crashed: WARNING in shmem_unlink representative crash: WARNING in shmem_unlink, types: [WARNING] the chunk can be dropped testing without sub-chunk 4/5 testing commit 30f09200cc4aefbd8385b01e41bde2e4565a6f0e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 1b60f2c8610f09b0a38ad880a2b75502c0498d908d383acc91aaa4fb503732fd run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc 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 false negative chance: 0.000 testing without sub-chunk 5/5 testing commit 30f09200cc4aefbd8385b01e41bde2e4565a6f0e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 412a1f56b647684fc59fe807ec855984c261fad07157c5772114ff139638de19 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: crashed: WARNING in shmem_unlink run #2: crashed: WARNING in shmem_unlink run #3: crashed: WARNING in shmem_unlink run #4: crashed: WARNING in shmem_unlink run #5: crashed: WARNING in shmem_unlink run #6: crashed: WARNING in shmem_unlink run #7: crashed: WARNING in shmem_unlink run #8: crashed: WARNING in shmem_unlink run #9: crashed: WARNING in shmem_unlink representative crash: WARNING in shmem_unlink, types: [WARNING] the chunk can be dropped minimized to 424 configs; suspects: [AF_RXRPC ARCH_ENABLE_MEMORY_HOTREMOVE ATM AX25 BT BT_BREDR BT_HIDP BXT_WC_PMIC_OPREGION CFG80211 CMA DAX DIBS DLM DMABUF_HEAPS DRM DVB_CORE ENCRYPTED_KEYS EXTCON GENEVE GPIOLIB HAMRADIO HAVE_CLK HID_NINTENDO HID_NVIDIA_SHIELD HID_PLAYSTATION HID_SENSOR_HUB HID_SMARTJOYPLUS HID_STEAM HID_THRUSTMASTER IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_IPOIB INFINIBAND_USER_ACCESS INFINIBAND_VIRT_DMA INPUT_TABLET INPUT_TOUCHSCREEN INTEL_SCU_IPC INTEL_SOC_PMIC_BXTWC IP_SCTP L2TP LEDS_CLASS_MULTICOLOR LIBNVDIMM MAC80211 MEDIA_COMMON_OPTIONS MEDIA_DIGITAL_TV_SUPPORT MEDIA_PLATFORM_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_INTEL_PMC_BXT MFD_MT6360 MFD_MT6370 MFD_RETU MMC MTD MTD_UBI NETFILTER_ADVANCED NETFILTER_CONNCOUNT NET_IPGRE NET_IPGRE_DEMUX NFS_V4_1 NF_CONNTRACK_SNMP NF_NAT_REDIRECT NF_NAT_SNMP_BASIC NF_NAT_TFTP NF_SOCKET_IPV4 NF_SOCKET_IPV6 NF_TPROXY_IPV4 NF_TPROXY_IPV6 NILFS2_FS NINTENDO_FF NLMON NLS_CODEPAGE_1250 NLS_CODEPAGE_1251 NLS_CODEPAGE_737 NLS_CODEPAGE_775 NLS_CODEPAGE_850 NLS_CODEPAGE_852 NLS_CODEPAGE_855 NLS_CODEPAGE_857 NLS_CODEPAGE_860 NLS_CODEPAGE_861 NLS_CODEPAGE_862 NLS_CODEPAGE_863 NLS_CODEPAGE_864 NLS_CODEPAGE_865 NLS_CODEPAGE_866 NLS_CODEPAGE_869 NLS_CODEPAGE_874 NLS_CODEPAGE_932 NLS_CODEPAGE_936 NLS_CODEPAGE_949 NLS_CODEPAGE_950 NLS_ISO8859_13 NLS_ISO8859_14 NLS_ISO8859_15 NLS_ISO8859_2 NLS_ISO8859_3 NLS_ISO8859_4 NLS_ISO8859_5 NLS_ISO8859_6 NLS_ISO8859_7 NLS_ISO8859_8 NLS_ISO8859_9 NLS_KOI8_R NLS_KOI8_U NLS_MAC_CELTIC NLS_MAC_CENTEURO NLS_MAC_CROATIAN NLS_MAC_CYRILLIC NLS_MAC_GAELIC NLS_MAC_GREEK NLS_MAC_ICELAND NLS_MAC_INUIT NLS_MAC_ROMAN NLS_MAC_ROMANIAN NLS_MAC_TURKISH NLS_UCS2_UTILS NOZOMI NTFS3_FS NTFS3_FS_POSIX_ACL NTFS3_LZX_XPRESS NULL_TTY NUMA_EMU NUMA_KEEP_MEMINFO NVDIMM_DAX NVDIMM_KEYS NVDIMM_PFN NVIDIA_SHIELD_FF NVME_CORE NVME_FABRICS NVME_FC NVME_MULTIPATH NVME_RDMA NVME_TARGET NVME_TARGET_FC NVME_TARGET_FCLOOP NVME_TARGET_LOOP NVME_TARGET_RDMA NVME_TARGET_TCP NVME_TCP N_GSM N_HDLC OCFS2_DEBUG_FS OCFS2_FS OCFS2_FS_O2CB OCFS2_FS_STATS OCFS2_FS_USERSPACE_CLUSTER OF_GPIO OF_PMEM OMFS_FS OPENVSWITCH OPENVSWITCH_GENEVE OPENVSWITCH_GRE OPENVSWITCH_VXLAN OPTEE_STATIC_PROTMEM_POOL ORANGEFS_FS OSF_PARTITION OVERLAY_FS OVERLAY_FS_DEBUG OVERLAY_FS_INDEX OVERLAY_FS_REDIRECT_ALWAYS_FOLLOW OVERLAY_FS_REDIRECT_DIR PACKET_DIAG PAGE_IDLE_FLAG PAGE_REPORTING PAHOLE_HAS_BTF_TAG PAHOLE_HAS_LANG_EXCLUDE PAHOLE_HAS_SPLIT_BTF PARPORT PARPORT_NOT_PC PARTITION_ADVANCED PCCARD PCCARD_NONSTATIC PCIEAER PCI_ENDPOINT PCI_IOV PCMCIA PCMCIA_LOAD_CIS PERCPU_STATS PERSISTENT_KEYRINGS PHYLINK PHY_CPCAP_USB PHY_QCOM_USB_HS PHY_QCOM_USB_HSIC PHY_SAMSUNG_USB2 PHY_TUSB1210 PKCS7_TEST_KEY PKCS8_PRIVATE_KEY_PARSER PLAYSTATION_FF PLFXLC PMIC_OPREGION PM_CLK PNFS_BLOCK PNFS_FILE_LAYOUT PNFS_FLEXFILE_LAYOUT POSIX_AUX_CLOCKS PPP PPPOATM PPPOE PPPOE_HASH_BITS_1 PPPOL2TP PPP_ASYNC PPP_BSDCOMP PPP_DEFLATE PPP_FILTER PPP_MPPE PPP_MULTILINK PPP_SYNC_TTY PPTP PREEMPT PREEMPT_NOTIFIERS PREEMPT_RT PROC_CHILDREN PSAMPLE PSI PSTORE PSTORE_COMPRESS QCOM_QMI_HELPERS QNX4FS_FS QNX6FS_FS QRTR QRTR_TUN RADIO_ADAPTERS RADIO_SHARK RADIO_SHARK2 RADIO_TEA575X RAID6_PQ RAID_ATTRS RC_ATI_REMOTE RC_CORE RC_DEVICES RC_XBOX_DVD RDMA_RXE RDMA_SIW RDS RDS_RDMA RDS_TCP REALTEK_AUTOPM REED_SOLOMON REED_SOLOMON_DEC8 REGMAP REGMAP_I2C REGMAP_IRQ REGMAP_MMIO REGMAP_SPI REGULATOR REGULATOR_FIXED_VOLTAGE REGULATOR_TWL4030 RESET_CONTROLLER RFKILL RFKILL_INPUT RFKILL_LEDS RMI4_2D_SENSOR RMI4_CORE RMI4_F03 RMI4_F03_SERIO RMI4_F11 RMI4_F12 RMI4_F30 RMI4_F3A ROMFS_BACKED_BY_BOTH ROMFS_FS ROMFS_ON_BLOCK ROMFS_ON_MTD ROSE RTC_DRV_HID_SENSOR_TIME RXKAD SCHED_CORE SCREEN_INFO SCSI_FC_ATTRS SCSI_HPSA SCSI_ISCSI_ATTRS SCSI_LOGGING SCSI_NETLINK SCSI_SAS_ATA SCSI_SAS_ATTRS SCSI_SAS_LIBSAS SCSI_SCAN_ASYNC SCSI_SRP_ATTRS SCTP_DEFAULT_COOKIE_HMAC_SHA256 SECONDARY_TRUSTED_KEYRING SECURITY_INFINIBAND SECURITY_NETWORK_XFRM SECURITY_SMACK_NETFILTER SENSORS_AQUACOMPUTER_D5NEXT SENSORS_CORSAIR_CPRO SENSORS_CORSAIR_PSU SENSORS_GIGABYTE_WATERFORCE SENSORS_NZXT_KRAKEN2 SENSORS_NZXT_SMART2 SENSORS_POWERZ SERIAL_DEV_BUS SERIAL_DEV_CTRL_TTYPORT SERIAL_MCTRL_GPIO SGI_PARTITION SIGNATURE SIGNED_PE_FILE_VERIFICATION SKB_DECRYPTED SLHC SLIP SLIP_COMPRESSED SLIP_MODE_SLIP6 SLIP_SMART SMARTJOYPLUS_FF SMBFS SMB_SERVER SMC SMC_DIAG SMSC_PHY SMS_SDIO_DRV SMS_SIANO_DEBUGFS SMS_SIANO_MDTV SMS_SIANO_RC SMS_USB_DRV SND SND_ALOOP SND_BCD2000 SND_CTL_FAST_LOOKUP SND_CTL_LED SND_DEBUG SND_DMA_SGBUF SND_DRIVERS SND_DUMMY SND_HDA SND_HDA_CODEC_ANALOG SND_HDA_CODEC_CA0110 SND_HDA_CODEC_CA0132 SND_HDA_CODEC_CIRRUS SND_HDA_CODEC_CMEDIA SND_HDA_CODEC_CONEXANT SND_HDA_CODEC_HDMI SND_HDA_CODEC_REALTEK SND_HDA_CODEC_SI3054 SND_HDA_CODEC_SIGMATEL SND_HDA_CODEC_VIA SND_HDA_CORE SND_HDA_GENERIC SND_HDA_GENERIC_LEDS SND_HDA_HWDEP SND_HDA_INPUT_BEEP SND_HDA_INTEL SND_HDA_PATCH_LOADER SND_HDA_RECONFIG SND_HRTIMER SND_HWDEP SND_INTEL_DSP_CONFIG SND_INTEL_NHLT SND_INTEL_SOUNDWIRE_ACPI SND_JACK SND_JACK_INPUT_DEV SND_MIXER_OSS SND_OSSEMUL SND_PCI SND_PCM SND_PCMCIA SND_PCM_OSS SND_PCM_OSS_PLUGINS SND_PCM_TIMER SND_PCM_XRUN_DEBUG SND_PROC_FS SND_RAWMIDI SND_SEQUENCER SND_SEQUENCER_OSS SND_SEQ_DEVICE SND_SEQ_DUMMY SND_SEQ_HRTIMER_DEFAULT SND_SEQ_MIDI SND_SEQ_MIDI_EVENT SND_SEQ_VIRMIDI SND_SOC SND_SOC_I2C_AND_SPI SND_SOC_SDCA_OPTIONAL SND_SUPPORT_OLD_API SND_TIMER SND_UMP SND_UMP_LEGACY_RAWMIDI SND_USB SND_USB_6FIRE SND_USB_AUDIO SND_USB_AUDIO_MIDI_V2 SND_USB_AUDIO_USE_MEDIA_CONTROLLER SND_USB_CAIAQ SND_USB_CAIAQ_INPUT SND_USB_HIFACE SND_USB_LINE6 SND_USB_POD SND_USB_PODHD SND_USB_TONEPORT SND_USB_UA101 SND_USB_US122L SND_USB_USX2Y SND_USB_VARIAX SND_VERBOSE_PROCFS SND_VIRMIDI SND_VIRTIO SND_VMASTER SND_X86 SOCK_VALIDATE_XMIT SOLARIS_X86_PARTITION SONY_FF SOUND SOUNDWIRE SOUND_OSS_CORE SOUND_OSS_CORE_PRECLAIM SPI SPI_DLN2 SPI_DYNAMIC SPI_LJCA SPI_MASTER SQUASHFS SQUASHFS_4K_DEVBLK_SIZE SQUASHFS_COMPILE_DECOMP_MULTI SQUASHFS_DECOMP_MULTI SQUASHFS_FILE_DIRECT SQUASHFS_LZ4 SQUASHFS_LZO SQUASHFS_XATTR SQUASHFS_XZ SQUASHFS_ZLIB SQUASHFS_ZSTD SSB SSB_PCIHOST_POSSIBLE SSB_PCMCIAHOST_POSSIBLE SSB_SDIOHOST_POSSIBLE STEAM_FF STP STREAM_PARSER SUNRPC_BACKCHANNEL SUN_PARTITION SURFACE_AGGREGATOR SURFACE_AGGREGATOR_BUS SURFACE_AGGREGATOR_REGISTRY SURFACE_HID SURFACE_HID_CORE SURFACE_KBD SW_SYNC SYSFB SYSFS_SYSCALL SYSV68_PARTITION TABLET_USB_ACECAD TABLET_USB_AIPTEK TABLET_USB_HANWANG TABLET_USB_KBTAB TABLET_USB_PEGASUS TAHVO_USB TAHVO_USB_HOST_BY_DEFAULT TCG_CRB TCG_TIS TCG_TIS_CORE TCG_TPM TCP_CONG_BBR TCP_CONG_BIC TCP_CONG_CDG TCP_CONG_DCTCP TCP_CONG_HSTCP TCP_CONG_HTCP TCP_CONG_HYBLA TCP_CONG_ILLINOIS TCP_CONG_LP TCP_CONG_NV TCP_CONG_SCALABLE TCP_CONG_VEGAS TCP_CONG_VENO TCP_CONG_WESTWOOD TCP_CONG_YEAH TEE TEE_DMABUF_HEAPS TEXTSEARCH TEXTSEARCH_BM TEXTSEARCH_FSM TEXTSEARCH_KMP THRUSTMASTER_FF TIPC TIPC_CRYPTO TIPC_DIAG TIPC_MEDIA_IB TIPC_MEDIA_UDP TLS TLS_TOE TMPFS_QUOTA TOOLS_SUPPORT_RELR TOUCHSCREEN_SUR40 TOUCHSCREEN_USB_3M TOUCHSCREEN_USB_COMPOSITE TOUCHSCREEN_USB_DMC_TSC10 TOUCHSCREEN_USB_E2I TOUCHSCREEN_USB_EASYTOUCH TOUCHSCREEN_USB_EGALAX TOUCHSCREEN_USB_ELO TOUCHSCREEN_USB_ETT_TC45USB TOUCHSCREEN_USB_ETURBO TOUCHSCREEN_USB_GENERAL_TOUCH TOUCHSCREEN_USB_GOTOP TOUCHSCREEN_USB_GUNZE TOUCHSCREEN_USB_IDEALTEK TOUCHSCREEN_USB_IRTOUCH TOUCHSCREEN_USB_ITM TOUCHSCREEN_USB_JASTEC TOUCHSCREEN_USB_NEXIO TOUCHSCREEN_USB_PANJIT TOUCHSCREEN_USB_ZYTRONIC TTPCI_EEPROM TTY_PRINTK TUN_VNET_CROSS_LE TWL4030_CORE TYPEC TYPEC_ANX7411 TYPEC_DP_ALTMODE TYPEC_FUSB302 TYPEC_HD3SS3220 TYPEC_MT6360 TYPEC_MUX_FSA4480 TYPEC_MUX_GPIO_SBU TYPEC_MUX_INTEL_PMC TYPEC_MUX_NB7VPQ904M TYPEC_MUX_PTN36502 TYPEC_MUX_WCD939X_USBSS TYPEC_NVIDIA_ALTMODE TYPEC_RT1711H TYPEC_RT1719 TYPEC_STUSB160X TYPEC_TCPCI TYPEC_TCPCI_MAXIM TYPEC_TCPCI_MT6370 TYPEC_TCPM TYPEC_TPS6598X TYPEC_UCSI TYPEC_WCOVE TYPEC_WUSB3801 UBIFS_ATIME_SUPPORT UBIFS_FS UBIFS_FS_ADVANCED_COMPR UBIFS_FS_LZO UBIFS_FS_SECURITY UBIFS_FS_XATTR UBIFS_FS_ZLIB UBIFS_FS_ZSTD UCSI_ACPI UCSI_CCG UCSI_STM32G0 UDF_FS UDMABUF UFS_FS UFS_FS_WRITE UHID ULTRIX_PARTITION UNICODE UNIXWARE_DISKLABEL UNIX_DIAG USB4 USB4_NET USBIP_CORE USBIP_HOST USBIP_VHCI_HCD USBIP_VUDC USBPCWATCHDOG USB_ACM USB_ADUTUX USB_AIRSPY USB_ALI_M5632 USB_AN2720 USB_APPLEDISPLAY USB_ARMLINUX USB_BDC_UDC USB_BELKIN USB_DWC2 USB_GADGET USB_LJCA USB_MUSB_HDRC USB_NET_CDC_SUBSET USB_ROLE_SWITCH USB_STORAGE_REALTEK USB_ULPI_BUS USB_USBNET VIDEO_DEV VXLAN WIRELESS WLAN WLAN_VENDOR_PURELIFI ZONE_DEVICE] 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: df4a113fe40c8f51ff555fa63051a3a62400e8c360818aa4a38e7e5d6326b1d9 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: crashed: WARNING in shmem_unlink run #6: crashed: WARNING in shmem_unlink run #7: crashed: WARNING in shmem_unlink run #8: crashed: WARNING in shmem_unlink run #9: crashed: WARNING in shmem_unlink representative crash: WARNING in shmem_unlink, types: [WARNING] 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: 99894bbbf90f4151388a0cd3eab9c53983b1b5082fab93f71346aacf0c4af8d0 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK false negative chance: 0.000 # git bisect start e5f0a698b34ed76002dc5cff3804a61c80233a7a 038d61fd642278bab63ee8ef722c50d10ab01e8f Bisecting: 7158 revisions left to test after this (roughly 13 steps) [63eb28bb1402891b1ad2be02a530f29a9dd7f1cd] Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm testing commit 63eb28bb1402891b1ad2be02a530f29a9dd7f1cd gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: a21c7d7b574f75ce22389dc7f8e0a57d7e4af699ae180a65023a9aeb9404389d run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: crashed: WARNING in shmem_unlink run #5: crashed: WARNING in shmem_unlink run #6: crashed: WARNING in shmem_unlink run #7: crashed: WARNING in shmem_unlink run #8: crashed: WARNING in shmem_unlink run #9: crashed: WARNING in shmem_unlink representative crash: WARNING in shmem_unlink, types: [WARNING] # git bisect bad 63eb28bb1402891b1ad2be02a530f29a9dd7f1cd Bisecting: 3597 revisions left to test after this (roughly 12 steps) [0ae982df67760cd08affa935c0fe86c8a9311797] Merge tag 'i2c-for-6.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux testing commit 0ae982df67760cd08affa935c0fe86c8a9311797 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 6b28e002071c335acba3cdfd10abc317963ab5b7a2db0130b21900d03a5a993f run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: crashed: WARNING in shmem_unlink run #4: crashed: WARNING in shmem_unlink run #5: crashed: WARNING in shmem_unlink run #6: crashed: WARNING in shmem_unlink run #7: crashed: WARNING in shmem_unlink run #8: crashed: WARNING in shmem_unlink run #9: crashed: WARNING in shmem_unlink representative crash: WARNING in shmem_unlink, types: [WARNING] # git bisect bad 0ae982df67760cd08affa935c0fe86c8a9311797 Bisecting: 1728 revisions left to test after this (roughly 11 steps) [fcb117e0758d1462128a50c5788555e03b48833b] Merge tag 'gpio-updates-for-v6.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux testing commit fcb117e0758d1462128a50c5788555e03b48833b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: e219648ae262c16313dc18766245158cbc917d65b034fe6673460e38762cbcdd run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: crashed: WARNING in shmem_unlink run #4: crashed: WARNING in shmem_unlink run #5: crashed: WARNING in shmem_unlink run #6: crashed: WARNING in shmem_unlink run #7: crashed: WARNING in shmem_unlink run #8: crashed: WARNING in shmem_unlink run #9: crashed: WARNING in shmem_unlink representative crash: WARNING in shmem_unlink, types: [WARNING] # git bisect bad fcb117e0758d1462128a50c5788555e03b48833b Bisecting: 914 revisions left to test after this (roughly 10 steps) [a578dd095dfe8b56c167201d9aea43e47d27f807] Merge tag 'crc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux testing commit a578dd095dfe8b56c167201d9aea43e47d27f807 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: e98a29fc052160c81d1bbede0df9be68f3c040d17114735669e6a648d29851b4 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: crashed: WARNING in shmem_unlink run #4: crashed: WARNING in shmem_unlink run #5: crashed: WARNING in shmem_unlink run #6: crashed: WARNING in shmem_unlink run #7: crashed: WARNING in shmem_unlink run #8: crashed: WARNING in shmem_unlink run #9: crashed: WARNING in shmem_unlink representative crash: WARNING in shmem_unlink, types: [WARNING] # git bisect bad a578dd095dfe8b56c167201d9aea43e47d27f807 Bisecting: 465 revisions left to test after this (roughly 9 steps) [7879d7aff0ffd969fcb1a59e3f87ebb353e47b7f] Merge tag 'vfs-6.17-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs testing commit 7879d7aff0ffd969fcb1a59e3f87ebb353e47b7f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 387624131ee1832dbebedc2529a0b10d2ba65352560a02533d02ab36bfe30d68 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc 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 good 7879d7aff0ffd969fcb1a59e3f87ebb353e47b7f Bisecting: 248 revisions left to test after this (roughly 8 steps) [e5cf61fa6e2fb9ae6339eaa892612488c966baaf] Merge tag 'v6.17-rc-smb3-server-fixes' of git://git.samba.org/ksmbd testing commit e5cf61fa6e2fb9ae6339eaa892612488c966baaf gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: fc59bdfe78f9c9df3b2b403f07e1b6dc36623284a7acf4b4d1fe0647ceeda2e7 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: crashed: WARNING in shmem_unlink run #6: crashed: WARNING in shmem_unlink run #7: crashed: WARNING in shmem_unlink run #8: crashed: WARNING in shmem_unlink run #9: crashed: WARNING in shmem_unlink representative crash: WARNING in shmem_unlink, types: [WARNING] # git bisect bad e5cf61fa6e2fb9ae6339eaa892612488c966baaf Bisecting: 118 revisions left to test after this (roughly 7 steps) [7031769e102b768b3fa0c4c726faf532cb31e973] Merge tag 'vfs-6.17-rc1.mmap_prepare' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs testing commit 7031769e102b768b3fa0c4c726faf532cb31e973 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: a9f18c8db64a70ea3c352f68f273852cd857af93da125b99b919889fbfd42e09 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: crashed: WARNING in shmem_unlink run #6: crashed: WARNING in shmem_unlink run #7: crashed: WARNING in shmem_unlink run #8: crashed: WARNING in shmem_unlink run #9: crashed: WARNING in shmem_unlink representative crash: WARNING in shmem_unlink, types: [WARNING] # git bisect bad 7031769e102b768b3fa0c4c726faf532cb31e973 Bisecting: 35 revisions left to test after this (roughly 6 steps) [934600daa7bcce8ad6d5efe05cce4811c8d2f464] Merge tag 'vfs-6.17-rc1.ovl' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs testing commit 934600daa7bcce8ad6d5efe05cce4811c8d2f464 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: d63422a2c17e0cada3ecf9e41f8f66a9a3bbaf938322a8614d72715d5af20af5 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: crashed: WARNING in shmem_unlink run #3: crashed: WARNING in shmem_unlink run #4: crashed: WARNING in shmem_unlink run #5: crashed: WARNING in shmem_unlink run #6: crashed: WARNING in shmem_unlink run #7: crashed: WARNING in shmem_unlink run #8: crashed: WARNING in shmem_unlink run #9: crashed: WARNING in shmem_unlink representative crash: WARNING in shmem_unlink, types: [WARNING] # git bisect bad 934600daa7bcce8ad6d5efe05cce4811c8d2f464 Bisecting: 30 revisions left to test after this (roughly 5 steps) [da9029b47d790675dcd82a6d9e332bc41e1a17f1] coredump: add coredump_skip() helper testing commit da9029b47d790675dcd82a6d9e332bc41e1a17f1 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 1915b8467685de10af473255c32deb80bba599c572fe1cd040552e6078313b4a run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: basic kernel testing failed: SYZFAIL: failed to recv rpc run #6: basic kernel testing failed: SYZFAIL: failed to recv rpc run #7: OK run #8: OK run #9: OK unable to determine the verdict: 3 good runs (wanted 5), for bad wanted 5 in total, got 3 # git bisect skip da9029b47d790675dcd82a6d9e332bc41e1a17f1 Bisecting: 30 revisions left to test after this (roughly 5 steps) [4a9f5d7fb6649af534c36aa8cc9c1aa51b172ad9] coredump: auto cleanup argv testing commit 4a9f5d7fb6649af534c36aa8cc9c1aa51b172ad9 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 7a979d2f325fc6af2aa3175fa85ee7979f8865cf393a8042bca3083380c469d8 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK false negative chance: 0.000 # git bisect good 4a9f5d7fb6649af534c36aa8cc9c1aa51b172ad9 Bisecting: 18 revisions left to test after this (roughly 4 steps) [241062ae5d8784158d0af5d7b9212c3b53d91ca5] ovl: change ovl_workdir_cleanup() to take dir lock as needed. testing commit 241062ae5d8784158d0af5d7b9212c3b53d91ca5 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: a99ac73028d2c9752b17c3b6ea212e9e0332b68a22a65b53ffb2a23a6d0ff494 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: basic kernel testing failed: SYZFAIL: failed to recv rpc run #6: basic kernel testing failed: SYZFAIL: failed to recv rpc run #7: crashed: WARNING in shmem_unlink run #8: crashed: WARNING in shmem_unlink run #9: crashed: WARNING in shmem_unlink representative crash: WARNING in shmem_unlink, types: [WARNING] unable to determine the verdict: 0 good runs (wanted 5), for bad wanted 5 in total, got 3 # git bisect skip 241062ae5d8784158d0af5d7b9212c3b53d91ca5 Bisecting: 18 revisions left to test after this (roughly 4 steps) [fe4d3360f9cbb513be6d74bdeb154728cad5c437] ovl: rename ovl_cleanup_unlocked() to ovl_cleanup() testing commit fe4d3360f9cbb513be6d74bdeb154728cad5c437 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 9d7f28bd9285de3489791b01aa11015c1b42f702017a776db2e0bd2e81099c0d run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: basic kernel testing failed: SYZFAIL: failed to recv rpc run #6: crashed: WARNING in shmem_unlink run #7: crashed: WARNING in shmem_unlink run #8: crashed: WARNING in shmem_unlink run #9: crashed: WARNING in shmem_unlink representative crash: WARNING in shmem_unlink, types: [WARNING] unable to determine the verdict: 0 good runs (wanted 5), for bad wanted 5 in total, got 4 # git bisect skip fe4d3360f9cbb513be6d74bdeb154728cad5c437 Bisecting: 18 revisions left to test after this (roughly 4 steps) [8434fac512d35597488b13e23cc85e2903f5c8ae] coredump: directly return testing commit 8434fac512d35597488b13e23cc85e2903f5c8ae gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 3d12e353d374fdfa3f706866a889362e7e44a6405422c3284ce68161d3964617 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK false negative chance: 0.000 # git bisect good 8434fac512d35597488b13e23cc85e2903f5c8ae Bisecting: 17 revisions left to test after this (roughly 4 steps) [ee37c3cfc5df9013dadf42919ca65510abc15632] ovl: change ovl_create_real() to receive dentry parent testing commit ee37c3cfc5df9013dadf42919ca65510abc15632 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 3f10787b2ed0778b8b224efd53c7bf6f2e3764f9f491e2b37a7be53b5b8e86c9 all runs: boot failed: can't ssh into the instance unable to determine the verdict: 0 good runs (wanted 5), for bad wanted 5 in total, got 0 # git bisect skip ee37c3cfc5df9013dadf42919ca65510abc15632 Bisecting: 17 revisions left to test after this (roughly 4 steps) [377d7860c960ac8e672881bc50353d867e2f94a4] cred: add auto cleanup method testing commit 377d7860c960ac8e672881bc50353d867e2f94a4 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 94c6c44dbff71182a446e14f9a8b53243a45d76153c06adc27ff244e77358433 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc 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 good 377d7860c960ac8e672881bc50353d867e2f94a4 Bisecting: 17 revisions left to test after this (roughly 4 steps) [a45ee87ded78876f8106a255f726b89aa69cd7a4] ovl: narrow locking in ovl_workdir_cleanup_recurse() testing commit a45ee87ded78876f8106a255f726b89aa69cd7a4 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: d53480dd1e3b02695af9752c07886c9217d32b496186160113a24ca6621edc76 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: crashed: WARNING in shmem_unlink run #6: crashed: WARNING in shmem_unlink run #7: crashed: WARNING in shmem_unlink run #8: crashed: WARNING in shmem_unlink run #9: crashed: WARNING in shmem_unlink representative crash: WARNING in shmem_unlink, types: [WARNING] # git bisect bad a45ee87ded78876f8106a255f726b89aa69cd7a4 Bisecting: 8 revisions left to test after this (roughly 3 steps) [a07052e07b67add56328b547ce4459878618334d] ovl: narrow locking in ovl_create_upper() testing commit a07052e07b67add56328b547ce4459878618334d gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: b311871313235d07514db00dfd742436d791bd2a29a9415de043dca745c1b398 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: basic kernel testing failed: SYZFAIL: failed to recv rpc run #6: crashed: WARNING in shmem_unlink run #7: crashed: WARNING in shmem_unlink run #8: crashed: WARNING in shmem_unlink run #9: crashed: WARNING in shmem_unlink representative crash: WARNING in shmem_unlink, types: [WARNING] unable to determine the verdict: 0 good runs (wanted 5), for bad wanted 5 in total, got 4 # git bisect skip a07052e07b67add56328b547ce4459878618334d Bisecting: 8 revisions left to test after this (roughly 3 steps) [04060e7860cb2dad21898248f7e7f7575ce44a14] Merge patch series "backing_file accessors cleanup" testing commit 04060e7860cb2dad21898248f7e7f7575ce44a14 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: d5c5696bc4e4fc14ae56b2e72f8dead637c4a95c4cb866a35b0000bdab41f485 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK false negative chance: 0.000 # git bisect good 04060e7860cb2dad21898248f7e7f7575ce44a14 Bisecting: 7 revisions left to test after this (roughly 3 steps) [4f622bd9f3e5dd1e882ee8f4194ea1d95dcf752f] ovl: narrow locking in ovl_clear_empty() testing commit 4f622bd9f3e5dd1e882ee8f4194ea1d95dcf752f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 9ee4e873d74298ecee265be0399fa62e5dba1b0578a7d86522af0856768f8b82 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: crashed: WARNING in shmem_unlink run #5: crashed: WARNING in shmem_unlink run #6: crashed: WARNING in shmem_unlink run #7: crashed: WARNING in shmem_unlink run #8: crashed: WARNING in shmem_unlink run #9: crashed: WARNING in shmem_unlink representative crash: WARNING in shmem_unlink, types: [WARNING] # git bisect bad 4f622bd9f3e5dd1e882ee8f4194ea1d95dcf752f Bisecting: 3 revisions left to test after this (roughly 2 steps) [c4f8f862b31ccd3d633475fe3982490c744b6565] ovl: change ovl_create_index() to take dir locks testing commit c4f8f862b31ccd3d633475fe3982490c744b6565 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 4fab1220ddeb52b5d4c646f650931392bcc2b733a7b2e91c1861a325db5f748c run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc 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 good c4f8f862b31ccd3d633475fe3982490c744b6565 Bisecting: 1 revision left to test after this (roughly 1 step) [a735bdf0b78528970f169870ced234dd3a33ea7b] ovl: narrow the locked region in ovl_copy_up_workdir() testing commit a735bdf0b78528970f169870ced234dd3a33ea7b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: c7c7ad499f422c934d64508c65a3b7717cda49f7543a099f0119e97585b87731 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: crashed: WARNING in shmem_unlink run #2: crashed: WARNING in shmem_unlink run #3: crashed: WARNING in shmem_unlink run #4: crashed: WARNING in shmem_unlink run #5: crashed: WARNING in shmem_unlink run #6: crashed: WARNING in shmem_unlink run #7: crashed: WARNING in shmem_unlink run #8: crashed: WARNING in shmem_unlink run #9: crashed: WARNING in shmem_unlink representative crash: WARNING in shmem_unlink, types: [WARNING] # git bisect bad a735bdf0b78528970f169870ced234dd3a33ea7b Bisecting: 0 revisions left to test after this (roughly 0 steps) [d2c995581c7c5d0ff623b2700e76bf22499c66df] ovl: Call ovl_create_temp() without lock held. testing commit d2c995581c7c5d0ff623b2700e76bf22499c66df gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 85fd7fa3d02f7c895b7e97ee28b2f2eaf0e0a042420731e3de9d103ba1f1003e run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: crashed: WARNING in shmem_unlink run #5: crashed: WARNING in shmem_unlink run #6: crashed: WARNING in shmem_unlink run #7: crashed: WARNING in shmem_unlink run #8: crashed: WARNING in shmem_unlink run #9: crashed: WARNING in shmem_unlink representative crash: WARNING in shmem_unlink, types: [WARNING] # git bisect bad d2c995581c7c5d0ff623b2700e76bf22499c66df d2c995581c7c5d0ff623b2700e76bf22499c66df is the first bad commit commit d2c995581c7c5d0ff623b2700e76bf22499c66df Author: NeilBrown Date: Wed Jul 16 10:44:14 2025 +1000 ovl: Call ovl_create_temp() without lock held. ovl currently locks a directory or two and then performs multiple actions in one or both directories. This is incompatible with proposed changes which will lock just the dentry of objects being acted on. This patch moves calls to ovl_create_temp() out of the locked regions and has it take and release the relevant lock itself. The lock that was taken before this function was called is now taken after. This means that any code between where the lock was taken and ovl_create_temp() is now unlocked. This necessitates the use of ovl_cleanup_unlocked() and the creation of ovl_lookup_upper_unlocked(). These will be used more widely in future patches. Now that the file is created before the lock is taken for rename, we need to ensure the parent wasn't changed before the lock was gained. ovl_lock_rename_workdir() is changed to optionally receive the dentries that will be involved in the rename. If either is present but has the wrong parent, an error is returned. Reviewed-by: Amir Goldstein Signed-off-by: NeilBrown Link: https://lore.kernel.org/20250716004725.1206467-4-neil@brown.name Signed-off-by: Christian Brauner fs/overlayfs/copy_up.c | 6 ------ fs/overlayfs/dir.c | 54 +++++++++++++++++++++++++----------------------- fs/overlayfs/overlayfs.h | 12 ++++++++++- fs/overlayfs/super.c | 11 ++++++---- fs/overlayfs/util.c | 7 ++++++- 5 files changed, 52 insertions(+), 38 deletions(-) accumulated error probability: 0.00 culprit signature: 85fd7fa3d02f7c895b7e97ee28b2f2eaf0e0a042420731e3de9d103ba1f1003e parent signature: 4fab1220ddeb52b5d4c646f650931392bcc2b733a7b2e91c1861a325db5f748c revisions tested: 31, total time: 8h5m18.558794565s (build: 3h33m0.461576537s, test: 3h59m15.396651817s) first bad commit: d2c995581c7c5d0ff623b2700e76bf22499c66df ovl: Call ovl_create_temp() without lock held. recipients (to): ["amir73il@gmail.com" "brauner@kernel.org" "neil@brown.name"] recipients (cc): [] crash: WARNING in shmem_unlink ------------[ cut here ]------------ WARNING: CPU: 0 PID: 3735 at fs/inode.c:417 drop_nlink+0x82/0xd0 fs/inode.c:417 Modules linked in: CPU: 0 UID: 0 PID: 3735 Comm: syz.3.18 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:drop_nlink+0x82/0xd0 fs/inode.c:417 Code: 48 8b 1f 48 8d bb b0 08 00 00 be 08 00 00 00 e8 54 15 f3 ff f0 48 ff 83 b0 08 00 00 5b 41 5c 41 5e 41 5f c3 cc cc cc cc cc 90 <0f> 0b 90 eb a7 89 d9 80 e1 07 80 c1 03 38 c1 7c 96 49 89 fc 48 89 RSP: 0018:ffffc900037ff2d0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88802a21ec88 RCX: ec2e28bb32c35900 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff88802a21ec40 RBP: dffffc0000000000 R08: ffffc900037ff287 R09: 1ffff920006ffe50 R10: dffffc0000000000 R11: fffff520006ffe51 R12: 0000000028fe14c5 R13: 000000006927a1dd R14: dffffc0000000000 R15: 1ffff11005443d91 FS: 00007efc9bc0e6c0(0000) GS:ffff8881309dc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007efc9bc0df98 CR3: 000000002d1ec000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: shmem_unlink+0x19f/0x250 mm/shmem.c:3976 shmem_rename2+0x1b3/0x2c0 mm/shmem.c:4062 vfs_rename+0x7c0/0xb50 fs/namei.c:5129 ovl_do_rename+0x130/0x1d0 fs/overlayfs/overlayfs.h:372 ovl_create_over_whiteout fs/overlayfs/dir.c:517 [inline] ovl_create_or_link+0x600/0x1170 fs/overlayfs/dir.c:623 ovl_create_object+0x1f0/0x2c0 fs/overlayfs/dir.c:662 lookup_open fs/namei.c:3708 [inline] open_last_lookups fs/namei.c:3807 [inline] path_openat+0xe56/0x2be0 fs/namei.c:4043 do_filp_open+0x1e4/0x3c0 fs/namei.c:4073 do_sys_openat2+0xfa/0x180 fs/open.c:1434 do_sys_open fs/open.c:1449 [inline] __do_sys_openat fs/open.c:1465 [inline] __se_sys_openat fs/open.c:1460 [inline] __x64_sys_openat+0xf3/0x120 fs/open.c:1460 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7efc9bdbf749 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:00007efc9bc0e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007efc9c016090 RCX: 00007efc9bdbf749 RDX: 0000000000105042 RSI: 0000200000000080 RDI: ffffffffffffff9c RBP: 00007efc9be43f91 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000000001ff R11: 0000000000000246 R12: 0000000000000000 R13: 00007efc9c016128 R14: 00007efc9c016090 R15: 00007ffedabdbde8