ci2 starts bisection 2026-06-15 18:55:51.57009228 +0000 UTC m=+20687.701392878
bisecting fixing commit since ad16b162f21d970235ced0c7e36e960c227317e8
building syzkaller on 6ccb967e465e832a7bfd7a116ad00d52a0923a5d
ensuring issue is reproducible on original commit ad16b162f21d970235ced0c7e36e960c227317e8

testing commit ad16b162f21d970235ced0c7e36e960c227317e8 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 435eb2ab35b3878f5da163c3a194b31792cf1c2ca12a4afb38eda1775cf25f17
run #0: crashed: INFO: task hung in new_device_store
run #1: crashed: INFO: task hung in synchronize_rcu
run #2: crashed: INFO: task hung in synchronize_rcu
run #3: crashed: INFO: task hung in synchronize_rcu
run #4: crashed: INFO: task hung in linkwatch_event
run #5: crashed: INFO: task hung in linkwatch_event
run #6: crashed: INFO: task hung in synchronize_rcu
run #7: crashed: INFO: task hung in synchronize_rcu
run #8: crashed: INFO: task hung in synchronize_rcu
run #9: crashed: INFO: task hung in usb_audio_probe
run #10: crashed: INFO: task hung in synchronize_rcu
run #11: crashed: INFO: task hung in uevent_show
run #12: crashed: INFO: task hung in switchdev_deferred_process_work
run #13: crashed: INFO: task hung in linkwatch_event
run #14: crashed: INFO: task hung in synchronize_rcu
run #15: crashed: INFO: task hung in synchronize_rcu
run #16: crashed: INFO: task hung in linkwatch_event
run #17: crashed: INFO: task hung in synchronize_rcu
run #18: crashed: INFO: task hung in synchronize_rcu
run #19: crashed: INFO: task hung in synchronize_rcu
representative crash: INFO: task hung in new_device_store, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit ad16b162f21d970235ced0c7e36e960c227317e8 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 3d6a384e3698853612eb09e744dd3b5989a18707b041fcd3c199125047a3f63b
run #0: crashed: INFO: task hung in new_device_store
run #1: crashed: INFO: task hung in ip6gre_exit_batch_net
run #2: crashed: INFO: task hung in regdb_fw_cb
run #3: crashed: INFO: task hung in synchronize_rcu
run #4: crashed: INFO: task hung in synchronize_rcu
run #5: crashed: INFO: task hung in synchronize_rcu
run #6: crashed: INFO: task hung in usb_audio_probe
run #7: crashed: INFO: task hung in regdb_fw_cb
run #8: crashed: INFO: task hung in synchronize_rcu
run #9: crashed: INFO: task hung in synchronize_rcu
representative crash: INFO: task hung in new_device_store, types: [HANG]
the bug reproduces without the instrumentation
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
kconfig minimization: base=3829 full=7620 leaves diff=2128
split chunks (needed=false): <2128>
split chunk #0 of len 2128 into 5 parts
testing without sub-chunk 1/5
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit ad16b162f21d970235ced0c7e36e960c227317e8 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 526f4745de7b9845dd5acaa552b996535be42a7dcb2e1c0346284b879b4ba9f9
run #0: crashed: INFO: task hung in regdb_fw_cb
run #1: crashed: INFO: task hung in synchronize_rcu
run #2: crashed: INFO: task hung in synchronize_rcu
run #3: crashed: INFO: task hung in rxrpc_destroy_all_connections
run #4: crashed: INFO: task hung in usb_audio_probe
run #5: crashed: INFO: task hung in synchronize_rcu
run #6: crashed: INFO: task hung in synchronize_rcu
run #7: crashed: INFO: task hung in regdb_fw_cb
run #8: crashed: INFO: task hung in synchronize_rcu
run #9: crashed: INFO: task hung in usb_audio_probe
representative crash: INFO: task hung in regdb_fw_cb, types: [HANG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed
testing commit ad16b162f21d970235ced0c7e36e960c227317e8 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 19cc9f92891fdc2dd8e05e92d0433385f1fee0a1c37e71daa88f2e4f3aa87295
run #0: crashed: INFO: task hung in addrconf_dad_work
run #1: crashed: INFO: task hung in __netlink_dump_start
run #2: crashed: INFO: task hung in synchronize_rcu
run #3: crashed: INFO: task hung in synchronize_rcu
run #4: crashed: INFO: task hung in addrconf_dad_work
run #5: crashed: INFO: task hung in synchronize_rcu
run #6: crashed: INFO: task hung in __netlink_dump_start
run #7: crashed: INFO: task hung in synchronize_rcu
run #8: crashed: INFO: task hung in synchronize_rcu
run #9: crashed: INFO: task hung in usb_audio_probe
representative crash: INFO: task hung in addrconf_dad_work, types: [HANG]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit ad16b162f21d970235ced0c7e36e960c227317e8 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 4ecd0af84facb9682743e6fcaac44dbe39c3495aa727acb04da62114cbfddf13
run #0: crashed: INFO: task hung in usb_audio_probe
run #1: crashed: INFO: task hung in usb_audio_probe
run #2: crashed: INFO: task hung in usb_audio_probe
run #3: crashed: INFO: task hung in usb_audio_probe
run #4: crashed: INFO: task hung in usb_audio_probe
run #5: crashed: INFO: task hung in usb_audio_probe
run #6: crashed: INFO: task hung in usb_audio_probe
run #7: crashed: INFO: task hung in usb_audio_probe
run #8: crashed: INFO: task hung in usb_audio_probe
run #9: crashed: INFO: task hung in uevent_show
representative crash: INFO: task hung in usb_audio_probe, types: [HANG]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed
testing commit ad16b162f21d970235ced0c7e36e960c227317e8 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: d55bd5f2897452f81d77f6df32e3c9ef3e655997ae32d0280d51943d972d2e61
all runs: OK
false negative chance: 0.000
testing without sub-chunk 5/5
disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed
testing commit ad16b162f21d970235ced0c7e36e960c227317e8 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 43f542d72a567da02b9d2c0f21b68f433426eaf2a88a1287de3c17d49debefa3
all runs: OK
false negative chance: 0.000
minimized to 850 configs; suspects: [AF_RXRPC ARCH_ENABLE_MEMORY_HOTREMOVE ATM AX25 BCMA BLK_DEV_ZONED BPF_SYSCALL BXT_WC_PMIC_OPREGION CARDBUS CFG80211 CFG80211_WEXT CMA COMMON_CLK CONTIG_ALLOC CRYPTO_842 CRYPTO_LZ4 CRYPTO_LZ4HC CRYPTO_LZO CRYPTO_ZSTD DAX DLM DRM DVB_CORE ENCRYPTED_KEYS EXTCON FB GENEVE GPIOLIB HAMRADIO HAVE_CLK HID_NINTENDO HID_PLAYSTATION 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 INTEL_SCU_IPC INTEL_SOC_PMIC_BXTWC IP_SCTP IRQ_REMAP KVM KVM_INTEL L2TP LEDS_CLASS_MULTICOLOR LIBNVDIMM MAC80211 MEDIA_ANALOG_TV_SUPPORT MEDIA_CAMERA_SUPPORT MEDIA_CEC_SUPPORT MEDIA_COMMON_OPTIONS MEDIA_CONTROLLER MEDIA_DIGITAL_TV_SUPPORT MEDIA_PLATFORM_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_INTEL_PMC_BXT MFD_MT6360 MFD_MT6370 MFD_RETU MFD_VIPERBOARD MMC MTD MTD_UBI NETFILTER_ADVANCED NETFILTER_CONNCOUNT NET_IPGRE NET_IPGRE_DEMUX NFS_V4_1 NF_CONNTRACK_SNMP NF_DUP_NETDEV NF_FLOW_TABLE NF_FLOW_TABLE_INET NF_NAT_AMANDA NF_NAT_H323 NF_NAT_PPTP NF_NAT_REDIRECT NF_NAT_SNMP_BASIC NF_NAT_TFTP NF_SOCKET_IPV4 NF_SOCKET_IPV6 NF_TABLES NF_TABLES_ARP NF_TABLES_NETDEV 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 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_POOL 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 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 PLAYSTATION_FF PLFXLC PMIC_OPREGION PM_CLK 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_NOTIFIERS PRISM2_USB PROC_CHILDREN PROC_MEM_ALWAYS_FORCE 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 RADIO_ADAPTERS RADIO_SHARK RADIO_SHARK2 RADIO_SI470X RADIO_SI4713 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 READ_ONLY_THP_FOR_FS REALTEK_AUTOPM REED_SOLOMON REED_SOLOMON_DEC8 REGMAP REGMAP_I2C REGMAP_IRQ REGMAP_MMIO REGULATOR REGULATOR_FIXED_VOLTAGE 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 SENSORS_AQUACOMPUTER_D5NEXT SENSORS_CORSAIR_CPRO SENSORS_CORSAIR_PSU SENSORS_NZXT_KRAKEN2 SENSORS_NZXT_SMART2 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 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_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 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_SUPPORT_OLD_API SND_TIMER SND_USB SND_USB_6FIRE SND_USB_AUDIO 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 SOUND_OSS_CORE SOUND_OSS_CORE_PRECLAIM SPI SPI_DLN2 SPI_DYNAMIC SPI_MASTER SQUASHFS SQUASHFS_4K_DEVBLK_SIZE SQUASHFS_DECOMP_SINGLE 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 STAGING STAGING_MEDIA STP STREAM_PARSER SUNRPC_BACKCHANNEL SUN_PARTITION SW_SYNC SYSFB 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_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 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 TRANSPARENT_HUGEPAGE TRANSPARENT_HUGEPAGE_MADVISE TTPCI_EEPROM TTY_PRINTK TUN TUN_VNET_CROSS_LE TWL4030_CORE TYPEC TYPEC_ANX7411 TYPEC_DP_ALTMODE TYPEC_FUSB302 TYPEC_HD3SS3220 TYPEC_MT6360 TYPEC_MUX_FSA4480 TYPEC_MUX_INTEL_PMC 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_AMD5536UDC USB_AN2720 USB_APPLEDISPLAY USB_ARMLINUX USB_ATM USB_BDC_UDC USB_BELKIN USB_C67X00_HCD USB_CATC USB_CDC_PHONET 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_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_PRINTER USB_CONFIGFS_F_TCM USB_CONFIGFS_F_UAC1 USB_CONFIGFS_F_UAC1_LEGACY USB_CONFIGFS_F_UAC2 USB_CONFIGFS_F_UVC USB_CONFIGFS_MASS_STORAGE USB_CONFIGFS_NCM USB_CONFIGFS_OBEX USB_CONFIGFS_PHONET USB_CONFIGFS_RNDIS USB_CONFIGFS_SERIAL USB_CONN_GPIO USB_CXACRU USB_CYPRESS_CY7C63 USB_CYTHERM USB_DSBR USB_DUMMY_HCD USB_DWC2 USB_DWC2_HOST USB_DWC2_PCI USB_DWC3 USB_DWC3_GADGET USB_DWC3_HAPS USB_DWC3_OF_SIMPLE USB_DWC3_PCI USB_DWC3_ULPI USB_DYNAMIC_MINORS USB_EG20T USB_EHCI_FSL USB_EHCI_HCD_PLATFORM USB_EHCI_ROOT_HUB_TT USB_EHSET_TEST_FIXTURE USB_EMI26 USB_EMI62 USB_EPSON2888 USB_EZUSB_FX2 USB_FEW_INIT_RETRIES USB_FOTG210_HCD USB_FOTG210_UDC USB_FTDI_ELAN USB_F_ACM USB_F_ECM USB_F_EEM USB_F_FS USB_F_HID USB_F_MASS_STORAGE USB_F_MIDI 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_GPIO_VBUS 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 USB_GSPCA_PAC207 USB_GSPCA_PAC7302 USB_GSPCA_PAC7311 USB_GSPCA_SE401 USB_GSPCA_SN9C2028 USB_GSPCA_SN9C20X USB_GSPCA_SONIXB USB_GSPCA_SONIXJ USB_GSPCA_SPCA1528 USB_GSPCA_SPCA500 USB_GSPCA_SPCA501 USB_GSPCA_SPCA505 USB_GSPCA_SPCA506 USB_GSPCA_SPCA508 USB_GSPCA_SPCA561 USB_GSPCA_SQ905 USB_GSPCA_SQ905C USB_GSPCA_SQ930X USB_GSPCA_STK014 USB_GSPCA_STK1135 USB_GSPCA_STV0680 USB_GSPCA_SUNPLUS USB_GSPCA_T613 USB_GSPCA_TOPRO USB_GSPCA_TOUPTEK USB_GSPCA_TV8532 USB_GSPCA_VC032X USB_GSPCA_VICAM USB_GSPCA_XIRLINK_CIT USB_GSPCA_ZC3XX USB_HACKRF USB_HCD_BCMA USB_HCD_SSB USB_HSIC_USB3503 USB_HSIC_USB4604 USB_HSO USB_HUB_USB251XB USB_IDMOUSE USB_IOWARRIOR USB_IPHETH USB_ISIGHTFW USB_ISP116X_HCD USB_ISP1301 USB_ISP1760 USB_ISP1760_DUAL_ROLE USB_ISP1760_HCD USB_ISP1761_UDC USB_KAWETH USB_KC2190 USB_KEENE USB_LAN78XX USB_LCD USB_LD USB_LEDS_TRIGGER_USBPORT USB_LED_TRIG USB_LEGOTOWER USB_LGM_PHY USB_LIBCOMPOSITE USB_LINK_LAYER_TEST USB_M5602 USB_MA901 USB_MAX3420_UDC USB_MAX3421_HCD USB_MDC800 USB_MICROTEK USB_MR800 USB_MSI2500 USB_MUSB_DUAL_ROLE USB_MUSB_HDRC USB_MV_U3D USB_MV_UDC USB_NET2272 USB_NET2272_DMA USB_NET2280 USB_NET_AQC111 USB_NET_AX88179_178A USB_NET_AX8817X USB_NET_CDCETHER USB_NET_CDC_EEM USB_NET_CDC_MBIM USB_NET_CDC_NCM USB_NET_CDC_SUBSET USB_NET_CDC_SUBSET_ENABLE USB_NET_CH9200 USB_NET_CX82310_ETH USB_NET_DM9601 USB_NET_GL620A USB_NET_HUAWEI_CDC_NCM USB_NET_INT51X1 USB_NET_KALMIA USB_NET_MCS7830 USB_NET_NET1080 USB_NET_PLUSB USB_NET_QMI_WWAN USB_NET_RNDIS_HOST USB_NET_RNDIS_WLAN 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_ROLE_SWITCH 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_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_PCI_RENESAS USB_XHCI_PLATFORM USB_XUSBATM USB_YUREX USERFAULTFD USERIO USER_RETURN_NOTIFIER U_SERIAL_CONSOLE V4L2_MEM2MEM_DEV V4L_TEST_DRIVERS VALIDATE_FS_PARSER VDPA VDPA_SIM VDPA_SIM_BLOCK VDPA_SIM_NET VDPA_USER VETH VFIO VFIO_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 VIDEOMODE_HELPERS VIDEO_AU0828 VIDEO_AU0828_RC VIDEO_AU0828_V4L2 VIDEO_CS53L32A VIDEO_CX231XX VIDEO_CX231XX_ALSA VIDEO_CX231XX_DVB VIDEO_CX231XX_RC VIDEO_CX2341X VIDEO_CX25840 VIDEO_DEV VIDEO_EM28XX VIDEO_EM28XX_ALSA VIDEO_EM28XX_DVB VIDEO_EM28XX_RC VIDEO_EM28XX_V4L2 VIDEO_GO7007 VIDEO_GO7007_LOADER VIDEO_GO7007_USB VIDEO_GO7007_USB_S2250_BOARD VIDEO_HDPVR VIDEO_MSP3400 VIDEO_PVRUSB2 VIDEO_PVRUSB2_DVB VIDEO_PVRUSB2_SYSFS VIDEO_SAA711X VIDEO_STK1160 VIDEO_STK1160_COMMON VIDEO_TUNER VIDEO_TVEEPROM VIDEO_USBTV VIDEO_V4L2_I2C VIDEO_V4L2_SUBDEV_API VIDEO_V4L2_TPG VIDEO_VICODEC VIDEO_VIM2M VIDEO_VIMC VIDEO_VIVID VIDEO_VIVID_CEC VIDEO_WM8775 VIPERBOARD_ADC VIRTIO_BALLOON VIRTIO_DMA_SHARED_BUFFER VIRTIO_MEM VIRTIO_MMIO VIRTIO_MMIO_CMDLINE_DEVICES VIRTIO_PMEM VIRTIO_VDPA VIRTIO_VSOCKETS VIRTIO_VSOCKETS_COMMON VIRT_WIFI VLAN_8021Q VLAN_8021Q_GVRP VLAN_8021Q_MVRP VMAP_PFN VMWARE_VMCI VMXNET3 VP_VDPA VSOCKETS VSOCKETS_DIAG VSOCKETS_LOOPBACK VSOCKMON VT_HW_CONSOLE_BINDING VXFS_FS VXLAN WANT_DEV_COREDUMP WEXT_CORE WEXT_PRIV WEXT_PROC WIREGUARD WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ADMTEK WLAN_VENDOR_PURELIFI WLAN_VENDOR_SILABS X86_SGX X86_SGX_KVM X86_X2APIC 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 XILLYBUS_CLASS XILLYUSB XOR_BLOCKS YENTA YENTA_ENE_TUNE YENTA_O2 YENTA_RICOH YENTA_TI YENTA_TOSHIBA ZBUD ZEROPLUS_FF ZLIB_DEFLATE ZONEFS_FS ZONE_DEVICE ZPOOL ZRAM ZRAM_DEF_COMP_LZORLE ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_LZO ZSWAP_DEFAULT_ON ZSWAP_ZPOOL_DEFAULT_ZBUD]
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing current HEAD 228da13e907e2b46b7222cfc35290fbfad920bef
testing commit 228da13e907e2b46b7222cfc35290fbfad920bef gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 470e353f39747c4fb6268b7314d819b4ed0454f79c54442b860a92f2e1ebacac
all runs: OK
false negative chance: 0.000
# git bisect start 228da13e907e2b46b7222cfc35290fbfad920bef ad16b162f21d970235ced0c7e36e960c227317e8
Bisecting: 481 revisions left to test after this (roughly 9 steps)
[47cc6b2b4034ec3082f8ca0b5df6acbcf692a203] net: bcmgenet: switch to use 64bit statistics

determine whether the revision contains the guilty commit
revision ad16b162f21d970235ced0c7e36e960c227317e8 crashed and is reachable
testing commit 47cc6b2b4034ec3082f8ca0b5df6acbcf692a203 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 37f4d2f77a8ec98796229a4734e10fcf3a3433bf73bf3e3c13c9e1a72499dbc6
all runs: OK
false negative chance: 0.000
# git bisect bad 47cc6b2b4034ec3082f8ca0b5df6acbcf692a203
Bisecting: 240 revisions left to test after this (roughly 8 steps)
[c9aac1b0344812002448f836c8e748624ef81021] KVM: nSVM: Sync NextRIP to cached vmcb12 after VMRUN of L2

determine whether the revision contains the guilty commit
revision ad16b162f21d970235ced0c7e36e960c227317e8 crashed and is reachable
testing commit c9aac1b0344812002448f836c8e748624ef81021 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: a39acd13f9eeb9b887b41b55836a29b2fdc0e15c35fc56d38e1bb9f925d3ce31
run #0: crashed: INFO: task hung in usb_audio_probe
run #1: crashed: INFO: task hung in usb_audio_probe
run #2: crashed: INFO: task hung in uevent_show
run #3: crashed: INFO: task hung in synchronize_rcu
run #4: crashed: INFO: task hung in usb_audio_probe
run #5: crashed: INFO: task hung in usb_audio_probe
run #6: crashed: INFO: task hung in usb_audio_probe
run #7: crashed: INFO: task hung in usb_audio_probe
run #8: crashed: INFO: task hung in usb_audio_probe
run #9: crashed: INFO: task hung in usb_audio_probe
representative crash: INFO: task hung in usb_audio_probe, types: [HANG]
# git bisect good c9aac1b0344812002448f836c8e748624ef81021
Bisecting: 120 revisions left to test after this (roughly 7 steps)
[4733ff424391403c9b791b0591f18799ca0c24a9] dm-verity-fec: correctly reject too-small hash devices

determine whether the revision contains the guilty commit
revision c9aac1b0344812002448f836c8e748624ef81021 crashed and is reachable
testing commit 4733ff424391403c9b791b0591f18799ca0c24a9 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 62fd970695abee713b3d2c9825a57893abe1205c9a33c9b47ba4f7d643d56b96
all runs: OK
false negative chance: 0.000
# git bisect bad 4733ff424391403c9b791b0591f18799ca0c24a9
Bisecting: 59 revisions left to test after this (roughly 6 steps)
[d50981aaaefc3b04490fbc8274d37881a2b1b112] net: Fix icmp host relookup triggering ip_rt_bug

determine whether the revision contains the guilty commit
revision ad16b162f21d970235ced0c7e36e960c227317e8 crashed and is reachable
testing commit d50981aaaefc3b04490fbc8274d37881a2b1b112 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 5598b9775fb1781ae86f4e9b9479d9adcd5fbf2f8b632d1a37cc6a308ccc5f76
run #0: crashed: INFO: task hung in usb_audio_probe
run #1: crashed: INFO: task hung in uevent_show
run #2: crashed: INFO: task hung in usb_audio_probe
run #3: crashed: INFO: task hung in synchronize_rcu
run #4: crashed: INFO: task hung in uevent_show
run #5: crashed: INFO: task hung in usb_audio_probe
run #6: crashed: INFO: task hung in usb_audio_probe
run #7: crashed: INFO: task hung in synchronize_rcu
run #8: crashed: INFO: task hung in uevent_show
run #9: crashed: INFO: task hung in usb_audio_probe
representative crash: INFO: task hung in usb_audio_probe, types: [HANG]
# git bisect good d50981aaaefc3b04490fbc8274d37881a2b1b112
Bisecting: 29 revisions left to test after this (roughly 5 steps)
[a44fbb631cba646532f3948636626f81717365a7] net: rtnetlink: zero ifla_vf_broadcast to avoid stack infoleak in rtnl_fill_vfinfo

determine whether the revision contains the guilty commit
revision c9aac1b0344812002448f836c8e748624ef81021 crashed and is reachable
testing commit a44fbb631cba646532f3948636626f81717365a7 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: e19062680fae44270496d5099c3c742cd34665a065d81700af8aa6b1438bb0b4
all runs: OK
false negative chance: 0.000
# git bisect bad a44fbb631cba646532f3948636626f81717365a7
Bisecting: 14 revisions left to test after this (roughly 4 steps)
[b1b16a77450c5c6fa074742e2923ec923547be85] ALSA: usb-audio: Fix UAC3 cluster descriptor size check

determine whether the revision contains the guilty commit
revision ad16b162f21d970235ced0c7e36e960c227317e8 crashed and is reachable
testing commit b1b16a77450c5c6fa074742e2923ec923547be85 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 473a23af07c9d99f4628910f6807c0983ca2ac7f43bf9c39dfcc4ff4e77cc75d
all runs: OK
false negative chance: 0.000
# git bisect bad b1b16a77450c5c6fa074742e2923ec923547be85
Bisecting: 7 revisions left to test after this (roughly 3 steps)
[2a79b1a492bcfa725383b6580cd93a6862308c85] wifi: mt76: mt7921: fix a potential clc buffer length underflow

determine whether the revision contains the guilty commit
revision c9aac1b0344812002448f836c8e748624ef81021 crashed and is reachable
testing commit 2a79b1a492bcfa725383b6580cd93a6862308c85 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 35de06da9511a9d15a1f60596cb18b1c2bddf3bc1b0ff6b10b5f736839a5e506
run #0: crashed: INFO: task hung in usb_audio_probe
run #1: crashed: INFO: task hung in usb_audio_probe
run #2: crashed: INFO: task hung in uevent_show
run #3: crashed: INFO: task hung in usb_audio_probe
run #4: crashed: INFO: task hung in usb_audio_probe
run #5: crashed: INFO: task hung in usb_audio_probe
run #6: crashed: INFO: task hung in usb_audio_probe
run #7: crashed: INFO: task hung in usb_audio_probe
run #8: crashed: INFO: task hung in usb_audio_probe
run #9: crashed: INFO: task hung in usb_audio_probe
representative crash: INFO: task hung in usb_audio_probe, types: [HANG]
# git bisect good 2a79b1a492bcfa725383b6580cd93a6862308c85
Bisecting: 3 revisions left to test after this (roughly 2 steps)
[765709720e6af9a178abc40244a8d1aa39ac4e71] wifi: b43: enforce bounds check on firmware key index in b43_rx()

determine whether the revision contains the guilty commit
revision 2a79b1a492bcfa725383b6580cd93a6862308c85 crashed and is reachable
testing commit 765709720e6af9a178abc40244a8d1aa39ac4e71 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: bac06b6e9ad5051001869ab8974ce0b4e896d5b4beda8b4fd526e1a61963b378
run #0: crashed: INFO: task hung in usb_audio_probe
run #1: crashed: INFO: task hung in synchronize_rcu
run #2: crashed: INFO: task hung in usb_audio_probe
run #3: crashed: INFO: task hung in usb_audio_probe
run #4: crashed: INFO: task hung in usb_audio_probe
run #5: crashed: INFO: task hung in usb_audio_probe
run #6: crashed: INFO: task hung in usb_audio_probe
run #7: crashed: INFO: task hung in usb_audio_probe
run #8: crashed: INFO: task hung in synchronize_rcu
run #9: crashed: INFO: task hung in synchronize_rcu
representative crash: INFO: task hung in usb_audio_probe, types: [HANG]
# git bisect good 765709720e6af9a178abc40244a8d1aa39ac4e71
Bisecting: 1 revision left to test after this (roughly 1 step)
[087d97342c100138ea7d75a50977c9c2319f957b] usb: usblp: fix uninitialized heap leak via LPGETSTATUS ioctl

determine whether the revision contains the guilty commit
revision d50981aaaefc3b04490fbc8274d37881a2b1b112 crashed and is reachable
testing commit 087d97342c100138ea7d75a50977c9c2319f957b gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 3f83296328e09c21503af31e966fe7a8c268036e5a8fc6ac2bcd783214a129ed
run #0: crashed: INFO: task hung in usb_audio_probe
run #1: crashed: INFO: task hung in synchronize_rcu
run #2: crashed: INFO: task hung in usb_audio_probe
run #3: crashed: INFO: task hung in usb_audio_probe
run #4: crashed: INFO: task hung in usb_audio_probe
run #5: crashed: INFO: task hung in usb_audio_probe
run #6: crashed: INFO: task hung in usb_audio_probe
run #7: crashed: INFO: task hung in uevent_show
run #8: crashed: INFO: task hung in synchronize_rcu
run #9: crashed: INFO: task hung in synchronize_rcu
representative crash: INFO: task hung in usb_audio_probe, types: [HANG]
# git bisect good 087d97342c100138ea7d75a50977c9c2319f957b
Bisecting: 0 revisions left to test after this (roughly 0 steps)
[24a40df79307ca7ca0eec0889361cf6ac146d72a] ALSA: usb-audio: Avoid potential endless loop in convert_chmap_v3()

determine whether the revision contains the guilty commit
revision 087d97342c100138ea7d75a50977c9c2319f957b crashed and is reachable
testing commit 24a40df79307ca7ca0eec0889361cf6ac146d72a gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 49ab9b64b8f136b12ea4815560c05e077eeabd1e6482adb2ade0de239f24272e
all runs: OK
false negative chance: 0.000
# git bisect bad 24a40df79307ca7ca0eec0889361cf6ac146d72a
24a40df79307ca7ca0eec0889361cf6ac146d72a is the first bad commit
commit 24a40df79307ca7ca0eec0889361cf6ac146d72a
Author: Takashi Iwai <tiwai@suse.de>
Date:   Mon Apr 27 17:22:15 2026 +0200

    ALSA: usb-audio: Avoid potential endless loop in convert_chmap_v3()
    
    commit 6e7247d8f5fefeceb0bb9cc80a5388a636b219cd upstream.
    
    The convert_chmap_v3() has a loop with its increment size of
    cs_desc->wLength, but we forgot to validate cs_desc->wLength itself,
    which may lead to potential endless loop by a malformed descriptor.
    
    Add a proper size check to abort the loop for plugging the hole.
    
    Fixes: ecfd41166b72 ("ALSA: usb-audio: Validate UAC3 cluster segment descriptors")
    Cc: <stable@vger.kernel.org>
    Link: https://patch.msgid.link/20260427152224.15276-1-tiwai@suse.de
    Signed-off-by: Takashi Iwai <tiwai@suse.de>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

 sound/usb/stream.c | 2 ++
 1 file changed, 2 insertions(+)

accumulated error probability: 0.00
culprit signature: 49ab9b64b8f136b12ea4815560c05e077eeabd1e6482adb2ade0de239f24272e
parent  signature: 3f83296328e09c21503af31e966fe7a8c268036e5a8fc6ac2bcd783214a129ed
revisions tested: 18, total time: 6h53m30.817209529s (build: 2h7m21.94412796s, test: 3h59m27.948764958s)
first good commit: 24a40df79307ca7ca0eec0889361cf6ac146d72a ALSA: usb-audio: Avoid potential endless loop in convert_chmap_v3()
recipients (to): ["gregkh@linuxfoundation.org" "tiwai@suse.de"]
recipients (cc): []