ci2 starts bisection 2023-09-27 18:28:05.040733441 +0000 UTC m=+22712.642527525 bisecting fixing commit since 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 building syzkaller on 90c93c40627cb0ac3c2c7cb99d807fd4c137adcb ensuring issue is reproducible on original commit 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 testing commit 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d0c44caf6f7cc1ba18c2dd35684368284b148277112fe7b7939424e55bfc0227 all runs: crashed: INFO: task hung in virtio_cleanup representative crash: INFO: task hung in virtio_cleanup, types: [HANG] check whether we can drop unnecessary instrumentation disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9bc23210d0b6651742f7083258fd0623cf8b5e6545c17100e220304c44b59002 all runs: crashed: INFO: task hung in virtio_cleanup representative crash: INFO: task hung in virtio_cleanup, types: [HANG] the bug reproduces without the instrumentation disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed kconfig minimization: base=3703 full=7272 leaves diff=1986 split chunks (needed=false): <1986> split chunk #0 of len 1986 into 5 parts testing without sub-chunk 1/5 disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed testing commit 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 99f116327c79911b083583b834461cf40f39a00e4158ac81809d1dbf0ed5fd08 run #0: crashed: INFO: task hung in corrupted run #1: crashed: INFO: task hung in virtio_cleanup run #2: crashed: INFO: task hung in virtio_cleanup run #3: crashed: INFO: task hung in virtio_cleanup run #4: crashed: INFO: task hung in virtio_cleanup run #5: crashed: INFO: task hung in virtio_cleanup run #6: crashed: INFO: task hung in virtio_cleanup run #7: crashed: INFO: task hung in virtio_cleanup run #8: crashed: INFO: task hung in virtio_cleanup run #9: crashed: INFO: task hung in virtio_cleanup representative crash: INFO: task hung in corrupted, types: [HANG] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed testing commit 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f743c87dc2789a09e5ecf8c795a460b319442c1f96e10592b9aa912283e6a1d4 all runs: crashed: INFO: task hung in virtio_cleanup representative crash: INFO: task hung in virtio_cleanup, 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 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: be1a7707cafe8c405272acbf25c970338246ddbdb3df5e207099aabf02a7f487 all runs: crashed: INFO: task hung in drop_current_rng representative crash: INFO: task hung in drop_current_rng, types: [HANG] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed testing commit 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8d2917e07542218f3cc886fdbda4a4cf80ef9f508bb81cb3d06ac9623ffd8428 all runs: OK false negative chance: 0.000 testing without sub-chunk 5/5 disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed testing commit 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 40f508d9d6756ae7a854986df9459cf18f87b8fb958f3994c5ee1c1b3ed47052 all runs: OK false negative chance: 0.000 minimized to 792 configs; suspects: [AF_RXRPC ARCH_ENABLE_MEMORY_HOTREMOVE ASYMMETRIC_TPM_KEY_SUBTYPE ATM AX25 BCMA BLK_DEV_ZONED BPF_SYSCALL CARDBUS CFG80211 CFG80211_WEXT CMA CONTIG_ALLOC CRYPTO_842 CRYPTO_LZ4 CRYPTO_LZ4HC CRYPTO_LZO CRYPTO_ZSTD DAX DLM DVB_CORE ENCRYPTED_KEYS EXTCON FB FRONTSWAP GENEVE GPIOLIB HAMRADIO HID_SENSOR_HUB HID_SMARTJOYPLUS HID_THRUSTMASTER HID_ZEROPLUS I2C_MUX IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_IPOIB INFINIBAND_USER_ACCESS INFINIBAND_VIRT_DMA INPUT_TABLET INPUT_TOUCHSCREEN IP_SCTP IRQ_REMAP L2TP LIBCRC32C LIBNVDIMM MEDIA_ANALOG_TV_SUPPORT MEDIA_CAMERA_SUPPORT MEDIA_CEC_SUPPORT MEDIA_COMMON_OPTIONS MEDIA_CONTROLLER MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTPLUG_SPARSE MEMORY_HOTREMOVE MFD_DLN2 MFD_RETU MFD_VIPERBOARD MMC MTD MTD_UBI NETFILTER_CONNCOUNT NET_IPGRE NET_IPGRE_DEMUX NFS_V4_1 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 NOP_USB_XCEIV NOZOMI NTFS3_FS NTFS3_FS_POSIX_ACL NTFS3_LZX_XPRESS NTFS_FS NTFS_RW NULL_TTY NUMA_BALANCING NUMA_BALANCING_DEFAULT_ENABLED NUMA_EMU NUMA_KEEP_MEMINFO NVDIMM_DAX NVDIMM_KEYS NVDIMM_PFN 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 ORANGEFS_FS OSF_PARTITION OVERLAY_FS OVERLAY_FS_INDEX OVERLAY_FS_REDIRECT_ALWAYS_FOLLOW OVERLAY_FS_REDIRECT_DIR PACKET_DIAG PADATA PAGE_IDLE_FLAG PAGE_REPORTING 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 PHONET PHYLINK PHY_CPCAP_USB PHY_QCOM_USB_HS PHY_QCOM_USB_HSIC PHY_SAMSUNG_USB2 PHY_TUSB1210 PKCS7_TEST_KEY PKCS8_PRIVATE_KEY_PARSER PNFS_BLOCK PNFS_FILE_LAYOUT PNFS_FLEXFILE_LAYOUT PPP PPPOATM PPPOE PPPOL2TP PPP_ASYNC PPP_BSDCOMP PPP_DEFLATE PPP_FILTER PPP_MPPE PPP_MULTILINK PPP_SYNC_TTY PPTP PREEMPT PREEMPT_DYNAMIC PREEMPT_NOTIFIERS PREEMPT_RCU PRISM2_USB PROC_CHILDREN PSI PSTORE PSTORE_842_COMPRESS PSTORE_COMPRESS PSTORE_DEFLATE_COMPRESS PSTORE_DEFLATE_COMPRESS_DEFAULT PSTORE_LZ4HC_COMPRESS PSTORE_LZ4_COMPRESS PSTORE_LZO_COMPRESS PSTORE_ZSTD_COMPRESS QCOM_QMI_HELPERS QNX4FS_FS QNX6FS_FS QRTR QRTR_TUN R8712U RADIO_ADAPTERS RADIO_SHARK RADIO_SHARK2 RADIO_SI470X RADIO_SI4713 RADIO_TEA575X RAID6_PQ RAID_ATTRS RC_ATI_REMOTE RC_CORE RC_DEVICES RDMA_RXE RDMA_SIW RDS RDS_RDMA RDS_TCP READ_ONLY_THP_FOR_FS REALTEK_AUTOPM REED_SOLOMON REED_SOLOMON_DEC8 REGMAP REGMAP_I2C REGMAP_IRQ REGMAP_MMIO REGULATOR REGULATOR_TWL4030 REISERFS_FS REISERFS_FS_POSIX_ACL REISERFS_FS_SECURITY REISERFS_FS_XATTR REISERFS_PROC_INFO RESET_CONTROLLER RFKILL RFKILL_INPUT RFKILL_LEDS RMI4_2D_SENSOR RMI4_CORE RMI4_F03 RMI4_F03_SERIO RMI4_F11 RMI4_F12 RMI4_F30 ROMFS_BACKED_BY_BOTH ROMFS_FS ROMFS_ON_BLOCK ROMFS_ON_MTD ROSE RTC_DRV_HID_SENSOR_TIME RXKAD SCHED_CORE 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_COOKIE_HMAC_MD5 SCTP_COOKIE_HMAC_SHA1 SCTP_DEFAULT_COOKIE_HMAC_MD5 SECONDARY_TRUSTED_KEYRING SECURITY_INFINIBAND SECURITY_NETWORK_XFRM SERIAL_DEV_BUS SERIAL_DEV_CTRL_TTYPORT SERIAL_MCTRL_GPIO SGI_PARTITION SIGNATURE SIGNED_PE_FILE_VERIFICATION SLHC SLIP SLIP_COMPRESSED SLIP_MODE_SLIP6 SLIP_SMART SMARTJOYPLUS_FF SMBFS_COMMON SMC SMC_DIAG SMSC_PHY SMS_SIANO_MDTV SMS_SIANO_RC SMS_USB_DRV SND SND_ALOOP SND_BCD2000 SND_CTL_LED SND_CTL_VALIDATION SND_DEBUG SND_DMA_SGBUF SND_DRIVERS SND_DUMMY SND_DYNAMIC_MINORS 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_COMPONENT SND_HDA_CORE SND_HDA_GENERIC SND_HDA_GENERIC_LEDS SND_HDA_HWDEP SND_HDA_I915 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 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STAGING STP STREAM_PARSER SUNRPC_BACKCHANNEL SUN_PARTITION SW_SYNC SYSV68_PARTITION SYSV_FS TABLET_USB_ACECAD TABLET_USB_AIPTEK TABLET_USB_HANWANG TABLET_USB_KBTAB TABLET_USB_PEGASUS TAHVO_USB TAHVO_USB_HOST_BY_DEFAULT TAP TARGET_CORE TASKS_RCU TASKS_RCU_GENERIC TASKS_TRACE_RCU 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 TEXTSEARCH TEXTSEARCH_BM TEXTSEARCH_FSM TEXTSEARCH_KMP THERMAL_NETLINK THP_SWAP THRUSTMASTER_FF TIPC TIPC_CRYPTO TIPC_DIAG TIPC_MEDIA_IB TIPC_MEDIA_UDP TLS TLS_TOE 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 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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_STKWEBCAM 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_REALTEK USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_STV06XX USB_TEST USB_TMC USB_TRANCEVIBRATOR USB_U132_HCD 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_PLATFORM USB_XUSBATM USB_YUREX USB_ZR364XX USERFAULTFD USERIO USERMODE_DRIVER USER_RETURN_NOTIFIER U_SERIAL_CONSOLE V4L2_MEM2MEM_DEV V4L_TEST_DRIVERS VALIDATE_FS_PARSER VDPA VETH VFIO VFIO_IOMMU_TYPE1 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_VDPA VHOST_VSOCK VIDEOBUF2_CORE VIDEOBUF2_DMA_CONTIG VIDEOBUF2_DMA_SG VIDEOBUF2_MEMOPS VIDEOBUF2_V4L2 VIDEOBUF2_VMALLOC VIDEOBUF_GEN VIDEOBUF_VMALLOC VIDEO_AU0828 VIDEO_AU0828_RC VIDEO_AU0828_V4L2 VIDEO_CPIA2 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_STK1160_COMMON VIDEO_TM6000 VIDEO_TM6000_ALSA VIDEO_TM6000_DVB VIDEO_TUNER VIDEO_TVEEPROM VIDEO_USBTV VIDEO_V4L2 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 VXLAN WANT_DEV_COREDUMP WEXT_CORE WEXT_PRIV WEXT_PROC WIREGUARD WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ADMTEK X86_SGX X86_X2APIC X86_X32 XARRAY_MULTI 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 XFS_SUPPORT_V4 XOR_BLOCKS YENTA YENTA_ENE_TUNE YENTA_O2 YENTA_RICOH YENTA_TI YENTA_TOSHIBA ZBUD ZEROPLUS_FF ZONEFS_FS ZONE_DEVICE ZPOOL ZRAM ZRAM_DEF_COMP_LZORLE ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_LZO ZSWAP_ZPOOL_DEFAULT_ZBUD] disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed testing current HEAD b911329317b4218e63baf78f3f422efbaa7198ed testing commit b911329317b4218e63baf78f3f422efbaa7198ed gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1ec8c4d7c798207adb552dbc60a4004daee238bf7838804080e3c46c13184ddb all runs: OK false negative chance: 0.000 # git bisect start b911329317b4218e63baf78f3f422efbaa7198ed 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 Bisecting: 1579 revisions left to test after this (roughly 11 steps) [ca9e766c8a49e03b31074003a349e78299ec83cc] kernfs: fix missing kernfs_idr_lock to remove an ID from the IDR determine whether the revision contains the guilty commit revision 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 crashed and is reachable testing commit ca9e766c8a49e03b31074003a349e78299ec83cc gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8325e11af9ca7c4092900460258135eed713e2e43a10b2aa4f106ba214279b7b all runs: OK false negative chance: 0.000 # git bisect bad ca9e766c8a49e03b31074003a349e78299ec83cc Bisecting: 788 revisions left to test after this (roughly 10 steps) [69966bce28da6aadccfd968b75d128a79da32d17] net/mlx5e: Fix deadlock in tc route query code determine whether the revision contains the guilty commit revision 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 crashed and is reachable testing commit 69966bce28da6aadccfd968b75d128a79da32d17 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e1f294d217ba41cfcae3ca2623396c8b4a588011cdf3cd0e02c837589ef0cf99 all runs: crashed: INFO: task hung in drop_current_rng representative crash: INFO: task hung in drop_current_rng, types: [HANG] # git bisect good 69966bce28da6aadccfd968b75d128a79da32d17 Bisecting: 394 revisions left to test after this (roughly 9 steps) [b28fc26683b4d6f5ec8e0f2a3ad193c92799029b] selftests: mptcp: lib: skip if missing symbol determine whether the revision contains the guilty commit revision 69966bce28da6aadccfd968b75d128a79da32d17 crashed and is reachable testing commit b28fc26683b4d6f5ec8e0f2a3ad193c92799029b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fba65ad8b1eca83e31b589e698d2a96e9944e1f4ed5b1019ce94053b714a8045 all runs: crashed: INFO: task hung in drop_current_rng representative crash: INFO: task hung in drop_current_rng, types: [HANG] # git bisect good b28fc26683b4d6f5ec8e0f2a3ad193c92799029b Bisecting: 197 revisions left to test after this (roughly 8 steps) [fc8429f8d86801f092fbfbd257c3af821ac0dcd3] net: nfc: Fix use-after-free caused by nfc_llcp_find_local determine whether the revision contains the guilty commit revision 69966bce28da6aadccfd968b75d128a79da32d17 crashed and is reachable testing commit fc8429f8d86801f092fbfbd257c3af821ac0dcd3 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fdc93c697682fbbe687de4d9337c9bb1762a284b049b7155a30542cae988e57e all runs: crashed: INFO: task hung in drop_current_rng representative crash: INFO: task hung in drop_current_rng, types: [HANG] # git bisect good fc8429f8d86801f092fbfbd257c3af821ac0dcd3 Bisecting: 98 revisions left to test after this (roughly 7 steps) [8ca6b2add2c084aceac76a3f1bc0444fe15cc8de] clk: ti: clkctrl: check return value of kasprintf() determine whether the revision contains the guilty commit revision 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 crashed and is reachable testing commit 8ca6b2add2c084aceac76a3f1bc0444fe15cc8de gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a388312cf1a9d00a23247c8669c22102f37f9a2ba215c3d82d50b38e2e440678 run #0: crashed: INFO: task hung in corrupted run #1: crashed: INFO: task hung in drop_current_rng run #2: crashed: INFO: task hung in drop_current_rng run #3: crashed: INFO: task hung in drop_current_rng run #4: crashed: INFO: task hung in drop_current_rng run #5: crashed: INFO: task hung in drop_current_rng run #6: crashed: INFO: task hung in drop_current_rng run #7: crashed: INFO: task hung in drop_current_rng run #8: crashed: INFO: task hung in drop_current_rng run #9: crashed: INFO: task hung in drop_current_rng representative crash: INFO: task hung in corrupted, types: [HANG] # git bisect good 8ca6b2add2c084aceac76a3f1bc0444fe15cc8de Bisecting: 49 revisions left to test after this (roughly 6 steps) [6d9f814b265cc9e39e2decfac5a62a0241617494] crypto: qat - unmap buffers before free for RSA determine whether the revision contains the guilty commit revision fc8429f8d86801f092fbfbd257c3af821ac0dcd3 crashed and is reachable testing commit 6d9f814b265cc9e39e2decfac5a62a0241617494 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f642385a972ffe5833d33a25478e49263752a11f67bf4c2a080e2acd64a0ddf6 all runs: OK false negative chance: 0.000 # git bisect bad 6d9f814b265cc9e39e2decfac5a62a0241617494 Bisecting: 24 revisions left to test after this (roughly 5 steps) [0a95dd17a73b7603818ad7c46c99d757232be331] pinctrl: at91-pio4: check return value of devm_kasprintf() determine whether the revision contains the guilty commit revision 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 crashed and is reachable testing commit 0a95dd17a73b7603818ad7c46c99d757232be331 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 61786cc7e7e69992e14d57507ab3bced156d7938b612f72d90a021b6980bdc7e all runs: crashed: INFO: task hung in drop_current_rng representative crash: INFO: task hung in drop_current_rng, types: [HANG] # git bisect good 0a95dd17a73b7603818ad7c46c99d757232be331 Bisecting: 12 revisions left to test after this (roughly 4 steps) [b030d239256c9a2cb354c1bdb797491d0c30fa6f] modpost: remove broken calculation of exception_table_entry size determine whether the revision contains the guilty commit revision fc8429f8d86801f092fbfbd257c3af821ac0dcd3 crashed and is reachable testing commit b030d239256c9a2cb354c1bdb797491d0c30fa6f gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f642385a972ffe5833d33a25478e49263752a11f67bf4c2a080e2acd64a0ddf6 all runs: OK false negative chance: 0.000 # git bisect bad b030d239256c9a2cb354c1bdb797491d0c30fa6f Bisecting: 5 revisions left to test after this (roughly 3 steps) [36874844f7b50946cbcd7636121faea04d39f623] powerpc/mm/dax: Fix the condition when checking if altmap vmemap can cross-boundary determine whether the revision contains the guilty commit revision 69966bce28da6aadccfd968b75d128a79da32d17 crashed and is reachable testing commit 36874844f7b50946cbcd7636121faea04d39f623 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 61786cc7e7e69992e14d57507ab3bced156d7938b612f72d90a021b6980bdc7e all runs: crashed: INFO: task hung in drop_current_rng representative crash: INFO: task hung in drop_current_rng, types: [HANG] # git bisect good 36874844f7b50946cbcd7636121faea04d39f623 Bisecting: 2 revisions left to test after this (roughly 2 steps) [9a9ef9652941777fdcea302a30b19075a940e059] hwrng: virtio - don't waste entropy determine whether the revision contains the guilty commit revision 36874844f7b50946cbcd7636121faea04d39f623 crashed and is reachable testing commit 9a9ef9652941777fdcea302a30b19075a940e059 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b21c1b6467912ef13c4727cc46f326109341ba9cf3788b12285df6aae144548a all runs: OK false negative chance: 0.000 # git bisect bad 9a9ef9652941777fdcea302a30b19075a940e059 Bisecting: 0 revisions left to test after this (roughly 1 step) [f5634d21541efab5712c2e948b32cdc3c9f00752] hwrng: virtio - don't wait on cleanup determine whether the revision contains the guilty commit revision 69966bce28da6aadccfd968b75d128a79da32d17 crashed and is reachable testing commit f5634d21541efab5712c2e948b32cdc3c9f00752 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e113e0a7a384ad34b7952cea6831ff9e27ca01feec406d767227e00d60b48b9f all runs: OK false negative chance: 0.000 # git bisect bad f5634d21541efab5712c2e948b32cdc3c9f00752 Bisecting: 0 revisions left to test after this (roughly 0 steps) [91806246e4e9029ed5c2ce275708a849f6f30d66] hwrng: virtio - add an internal buffer determine whether the revision contains the guilty commit revision 0a95dd17a73b7603818ad7c46c99d757232be331 crashed and is reachable testing commit 91806246e4e9029ed5c2ce275708a849f6f30d66 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d8781f90dcbc25597945ee7eb5d5e365868bd0c58a30698a4abde7ffd0c2c9b5 all runs: crashed: INFO: task hung in drop_current_rng representative crash: INFO: task hung in drop_current_rng, types: [HANG] # git bisect good 91806246e4e9029ed5c2ce275708a849f6f30d66 f5634d21541efab5712c2e948b32cdc3c9f00752 is the first bad commit commit f5634d21541efab5712c2e948b32cdc3c9f00752 Author: Laurent Vivier Date: Thu Oct 28 12:11:09 2021 +0200 hwrng: virtio - don't wait on cleanup [ Upstream commit 2bb31abdbe55742c89f4dc0cc26fcbc8467364f6 ] When virtio-rng device was dropped by the hwrng core we were forced to wait the buffer to come back from the device to not have remaining ongoing operation that could spoil the buffer. But now, as the buffer is internal to the virtio-rng we can release the waiting loop immediately, the buffer will be retrieve and use when the virtio-rng driver will be selected again. This avoids to hang on an rng_current write command if the virtio-rng device is blocked by a lack of entropy. This allows to select another entropy source if the current one is empty. Signed-off-by: Laurent Vivier Link: https://lore.kernel.org/r/20211028101111.128049-3-lvivier@redhat.com Signed-off-by: Michael S. Tsirkin Stable-dep-of: ac52578d6e8d ("hwrng: virtio - Fix race on data_avail and actual data") Signed-off-by: Sasha Levin drivers/char/hw_random/virtio-rng.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) accumulated error probability: 0.00 culprit signature: e113e0a7a384ad34b7952cea6831ff9e27ca01feec406d767227e00d60b48b9f parent signature: d8781f90dcbc25597945ee7eb5d5e365868bd0c58a30698a4abde7ffd0c2c9b5 revisions tested: 20, total time: 3h38m59.476862397s (build: 44m28.108264146s, test: 2h50m24.514755028s) first good commit: f5634d21541efab5712c2e948b32cdc3c9f00752 hwrng: virtio - don't wait on cleanup recipients (to): ["lvivier@redhat.com" "mst@redhat.com" "sashal@kernel.org"] recipients (cc): []