ci2 starts bisection 2026-09-19 03:50:57.138328818 +0000 UTC m=+75108.515003741 bisecting fixing commit since 674f684f7c61c3db475450e8c2b0c5701f9e4ae7 building syzkaller on 492bab153dea5e0e414bd0bbf60c3871267255ed ensuring issue is reproducible on original commit 674f684f7c61c3db475450e8c2b0c5701f9e4ae7 testing commit 674f684f7c61c3db475450e8c2b0c5701f9e4ae7 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 2e1297b15e869a67ca3a54b36e7b14b0379d77e23f0d49addbd3d2186f259a2f all runs: crashed: KASAN: use-after-free Read in uea_upload_pre_firmware representative crash: KASAN: use-after-free Read in uea_upload_pre_firmware, types: [KASAN-USE-AFTER-FREE-READ] check whether we can drop unnecessary instrumentation disabling configs for [memleak ubsan bug_or_warning locking atomic_sleep hang], they are not needed testing commit 674f684f7c61c3db475450e8c2b0c5701f9e4ae7 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: fb3ad21873742a87f95439e5cd5af428b66055277995155c89f0ad6bd8be58fc all runs: crashed: KASAN: use-after-free Read in uea_upload_pre_firmware representative crash: KASAN: use-after-free Read in uea_upload_pre_firmware, types: [KASAN-USE-AFTER-FREE-READ] the bug reproduces without the instrumentation disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed kconfig minimization: base=3707 full=7427 leaves diff=2100 split chunks (needed=false): <2100> split chunk #0 of len 2100 into 5 parts testing without sub-chunk 1/5 disabling configs for [memleak ubsan bug_or_warning locking atomic_sleep hang], they are not needed testing commit 674f684f7c61c3db475450e8c2b0c5701f9e4ae7 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 49697931a746035b5623df4f64b829a4d98246da9a1c3ccdb6d73313cc49f1fe all runs: crashed: KASAN: use-after-free Read in uea_upload_pre_firmware representative crash: KASAN: use-after-free Read in uea_upload_pre_firmware, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed testing commit 674f684f7c61c3db475450e8c2b0c5701f9e4ae7 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 9f0181a374878d330e3ae7383cb925ae330b5c35fcc6b3f7eb44172394a3a493 all runs: crashed: KASAN: use-after-free Read in uea_upload_pre_firmware representative crash: KASAN: use-after-free Read in uea_upload_pre_firmware, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [hang memleak ubsan bug_or_warning locking atomic_sleep], they are not needed testing commit 674f684f7c61c3db475450e8c2b0c5701f9e4ae7 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 41321d9a23f460bea47959942066e0474527d9da0285bd2915adb803df8ad765 all runs: crashed: KASAN: use-after-free Read in uea_upload_pre_firmware representative crash: KASAN: use-after-free Read in uea_upload_pre_firmware, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [hang memleak ubsan bug_or_warning locking atomic_sleep], they are not needed testing commit 674f684f7c61c3db475450e8c2b0c5701f9e4ae7 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: dc43c3813cde46af0e4800a7844140835a79b180ee66532cf7ce34c4e382e653 all runs: crashed: KASAN: use-after-free Read in uea_upload_pre_firmware representative crash: KASAN: use-after-free Read in uea_upload_pre_firmware, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit 674f684f7c61c3db475450e8c2b0c5701f9e4ae7 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 413c479e2313ad1b1cc67b344227b3a3cee42a50527ac25b3886df874c3793b6 all runs: OK false negative chance: 0.000 minimized to 420 configs; suspects: [ARCH_ENABLE_MEMORY_HOTREMOVE ATM BCMA BLK_DEV_ZONED BPF_SYSCALL CARDBUS CFG80211 CFG80211_WEXT CMA CONTIG_ALLOC CRYPTO_842 CRYPTO_LZ4 CRYPTO_LZ4HC CRYPTO_LZO CRYPTO_ZSTD DVB_CORE EXTCON FB FRONTSWAP GPIOLIB HID_ZEROPLUS I2C_MUX IIO IRQ_REMAP LIBNVDIMM MEDIA_ANALOG_TV_SUPPORT MEDIA_CAMERA_SUPPORT MEDIA_CEC_SUPPORT MEDIA_CONTROLLER MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTPLUG_SPARSE MEMORY_HOTREMOVE MFD_VIPERBOARD NOP_USB_XCEIV PARPORT PCCARD PCMCIA PHONET RADIO_ADAPTERS RADIO_SI470X RADIO_SI4713 RC_CORE RFKILL SND SOUND SPI SSB TAP TARGET_CORE TUN USB_AMD5536UDC USB_ATM USB_CHIPIDEA USB_CHIPIDEA_HOST USB_CHIPIDEA_IMX USB_CHIPIDEA_MSM USB_CHIPIDEA_PCI USB_CHIPIDEA_TEGRA 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_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_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_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 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 WANT_DEV_COREDUMP WEXT_CORE WEXT_PRIV WEXT_PROC WIREGUARD WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ADMTEK X86_SGX 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_ONLINE_REPAIR XFS_ONLINE_SCRUB 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 ZONEFS_FS ZPOOL ZRAM ZRAM_DEF_COMP_LZORLE ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_LZO ZSWAP_DEFAULT_ON ZSWAP_ZPOOL_DEFAULT_ZBUD] disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning locking], they are not needed testing current HEAD 0248c33e835ecbec3a591f93fdaae53f7b90a4d6 testing commit 0248c33e835ecbec3a591f93fdaae53f7b90a4d6 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 309a78a8b708fee45474667b46864619456c986df73692358a71a4a730db9aa3 all runs: OK false negative chance: 0.000 # git bisect start 0248c33e835ecbec3a591f93fdaae53f7b90a4d6 674f684f7c61c3db475450e8c2b0c5701f9e4ae7 Bisecting: 902 revisions left to test after this (roughly 10 steps) [3b8938f5fbcf4a918785f9cb4b108782eb4ea717] fpga: altera-cvp: Avoid out-of-bounds read in trailing byte write determine whether the revision contains the guilty commit revision 674f684f7c61c3db475450e8c2b0c5701f9e4ae7 crashed and is reachable testing commit 3b8938f5fbcf4a918785f9cb4b108782eb4ea717 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: f01b15bb1d4708917119cf92df2c4ad67ece1ad2eb4e0a41c845cfb6a6725c27 all runs: OK false negative chance: 0.000 # git bisect bad 3b8938f5fbcf4a918785f9cb4b108782eb4ea717 Bisecting: 451 revisions left to test after this (roughly 9 steps) [1aa21e7c8702a7c37cd7d3cace1a652cfa5e8171] vsock/virtio: avoid refilling the RX queue after teardown determine whether the revision contains the guilty commit revision 674f684f7c61c3db475450e8c2b0c5701f9e4ae7 crashed and is reachable testing commit 1aa21e7c8702a7c37cd7d3cace1a652cfa5e8171 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 2ac796a88442b4e20da6f9107d00c2731a6e335629a3741018f25e7030273850 all runs: OK false negative chance: 0.000 # git bisect bad 1aa21e7c8702a7c37cd7d3cace1a652cfa5e8171 Bisecting: 225 revisions left to test after this (roughly 8 steps) [2b19fe277645fd1aeb18fd4ecdcf31966080dee7] net: hip04: fix RX buffer leak on build_skb failure determine whether the revision contains the guilty commit revision 674f684f7c61c3db475450e8c2b0c5701f9e4ae7 crashed and is reachable testing commit 2b19fe277645fd1aeb18fd4ecdcf31966080dee7 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 67fb3e80251684e22393dd87cfffb57146487bdbb926f98fe80de1677733ebf7 all runs: OK false negative chance: 0.000 # git bisect bad 2b19fe277645fd1aeb18fd4ecdcf31966080dee7 Bisecting: 112 revisions left to test after this (roughly 7 steps) [1ae00b6d9a6c82eb3de151d9b04ed59e06cc100f] wifi: mwifiex: bound uAP association event IEs to the event buffer determine whether the revision contains the guilty commit revision 674f684f7c61c3db475450e8c2b0c5701f9e4ae7 crashed and is reachable testing commit 1ae00b6d9a6c82eb3de151d9b04ed59e06cc100f gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 0536643835b2e1fffc030960821ea9a50b5abf04f52e1baa40165243b47e825a all runs: OK false negative chance: 0.000 # git bisect bad 1ae00b6d9a6c82eb3de151d9b04ed59e06cc100f Bisecting: 55 revisions left to test after this (roughly 6 steps) [20119517378661baa4c9c007b003c4970884678f] powerpc: remove the last remnants of cputime_t determine whether the revision contains the guilty commit revision 674f684f7c61c3db475450e8c2b0c5701f9e4ae7 crashed and is reachable testing commit 20119517378661baa4c9c007b003c4970884678f gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 6d874af8814ffbb9496db60c39b1da554ef61da1479584f45ec9866b39db704b all runs: crashed: KASAN: use-after-free Read in uea_upload_pre_firmware representative crash: KASAN: use-after-free Read in uea_upload_pre_firmware, types: [KASAN-USE-AFTER-FREE-READ] # git bisect good 20119517378661baa4c9c007b003c4970884678f Bisecting: 27 revisions left to test after this (roughly 5 steps) [723bf81751aec13b0c0750f02a15a1406e87985d] usb: xhci-pci: Limit VIA VL805 DMA addressing to 36 bits determine whether the revision contains the guilty commit revision 20119517378661baa4c9c007b003c4970884678f crashed and is reachable testing commit 723bf81751aec13b0c0750f02a15a1406e87985d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: d68a4509c093a8206ca15aec40bdf61b2ac99388f7cdaf859655c60f15a1aa74 all runs: crashed: KASAN: use-after-free Read in uea_upload_pre_firmware representative crash: KASAN: use-after-free Read in uea_upload_pre_firmware, types: [KASAN-USE-AFTER-FREE-READ] # git bisect good 723bf81751aec13b0c0750f02a15a1406e87985d Bisecting: 13 revisions left to test after this (roughly 4 steps) [32680e8f5609897051528205d29080f27f7252f9] ASoC: bt-sco: fix duplicate DAPM widget names for wideband DAI determine whether the revision contains the guilty commit revision 20119517378661baa4c9c007b003c4970884678f crashed and is reachable testing commit 32680e8f5609897051528205d29080f27f7252f9 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: d68a4509c093a8206ca15aec40bdf61b2ac99388f7cdaf859655c60f15a1aa74 all runs: crashed: KASAN: use-after-free Read in uea_upload_pre_firmware representative crash: KASAN: use-after-free Read in uea_upload_pre_firmware, types: [KASAN-USE-AFTER-FREE-READ] # git bisect good 32680e8f5609897051528205d29080f27f7252f9 Bisecting: 6 revisions left to test after this (roughly 3 steps) [c820f4b7f2fa38f8769db0d0cefdd94e2721504d] net/packet: avoid fanout hook re-registration after unregister determine whether the revision contains the guilty commit revision 723bf81751aec13b0c0750f02a15a1406e87985d crashed and is reachable testing commit c820f4b7f2fa38f8769db0d0cefdd94e2721504d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 0536643835b2e1fffc030960821ea9a50b5abf04f52e1baa40165243b47e825a all runs: OK false negative chance: 0.000 # git bisect bad c820f4b7f2fa38f8769db0d0cefdd94e2721504d Bisecting: 3 revisions left to test after this (roughly 2 steps) [f5485a58e919d6d43469b6dac26001770f2ebab0] hwmon: (occ) Add sysfs entry for OCC mode determine whether the revision contains the guilty commit revision 723bf81751aec13b0c0750f02a15a1406e87985d crashed and is reachable testing commit f5485a58e919d6d43469b6dac26001770f2ebab0 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: bbb37e73d9b475feb37e6d45b5ba53f328a87b0b35b834056388f7ca42529382 all runs: OK false negative chance: 0.000 # git bisect bad f5485a58e919d6d43469b6dac26001770f2ebab0 Bisecting: 0 revisions left to test after this (roughly 1 step) [0f5f26508002c7beab8bb44cf8e6b8f2e43b2249] hwmon: (occ) Add sysfs entry for IPS (Idle Power Saver) status determine whether the revision contains the guilty commit revision 723bf81751aec13b0c0750f02a15a1406e87985d crashed and is reachable testing commit 0f5f26508002c7beab8bb44cf8e6b8f2e43b2249 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: bbb37e73d9b475feb37e6d45b5ba53f328a87b0b35b834056388f7ca42529382 all runs: OK false negative chance: 0.000 # git bisect bad 0f5f26508002c7beab8bb44cf8e6b8f2e43b2249 Bisecting: 0 revisions left to test after this (roughly 0 steps) [f92832262718443feb4e5df2bf70424ba842629e] usb: atm: ueagle-atm: reject descriptors that confuse probe and disconnect determine whether the revision contains the guilty commit revision 723bf81751aec13b0c0750f02a15a1406e87985d crashed and is reachable testing commit f92832262718443feb4e5df2bf70424ba842629e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: bbb37e73d9b475feb37e6d45b5ba53f328a87b0b35b834056388f7ca42529382 all runs: OK false negative chance: 0.000 # git bisect bad f92832262718443feb4e5df2bf70424ba842629e f92832262718443feb4e5df2bf70424ba842629e is the first bad commit commit f92832262718443feb4e5df2bf70424ba842629e Author: Diego Fernando Mancera Gomez Date: Fri Jul 17 02:07:04 2026 -0600 usb: atm: ueagle-atm: reject descriptors that confuse probe and disconnect [ Upstream commit 71132cedd1ecbc4032d76e9928c18a10f7e39b80 ] uea_probe() distinguishes a pre-firmware device from a post-firmware one using the USB id (UEA_IS_PREFIRM()), and stores a different object as the interface data in each case: a 'struct completion' for a pre-firmware device (to be waited on in .disconnect()), or a 'struct usbatm_data' for a post-firmware one. uea_disconnect() instead tells the two apart by the number of interfaces of the active configuration (a pre-firmware device exposes a single interface, ADI930 has 2 and eagle has 3), and casts the interface data accordingly. Because the two handlers use different criteria, a crafted device that advertises a pre-firmware id together with a multi-interface descriptor (or a post-firmware id with a single interface) makes them disagree: the small 'struct completion' stored by uea_probe() is then passed to usbatm_usb_disconnect(), which casts it to 'struct usbatm_data' and takes instance->serialize, reading past the end of the allocation: BUG: KASAN: slab-out-of-bounds in __mutex_lock+0x152a/0x1b80 Read of size 8 at addr ffff8880470e2c60 by task kworker/1:2/982 ... __mutex_lock+0x152a/0x1b80 usbatm_usb_disconnect+0x70/0x820 uea_disconnect+0x133/0x2c0 usb_unbind_interface+0x1dd/0x9e0 ... which belongs to the cache kmalloc-96 of size 96 The buggy address is located 0 bytes to the right of allocated 96-byte region [ffff8880470e2c00, ffff8880470e2c60) Reject such inconsistent descriptors in uea_probe() so that both handlers always make the same pre/post-firmware decision. Reported-by: syzbot+e62a973f8322b3bbe3ac@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=e62a973f8322b3bbe3ac Fixes: e2674dfbed8a ("usb: atm: ueagle-atm: wait for pre-firmware load in .disconnect()") Signed-off-by: Diego Fernando Mancera Gomez Acked-by: Stanislaw Gruszka Link: https://patch.msgid.link/20260717080704.1264-1-diegomancera.dev@gmail.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin drivers/usb/atm/ueagle-atm.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) accumulated error probability: 0.00 culprit signature: bbb37e73d9b475feb37e6d45b5ba53f328a87b0b35b834056388f7ca42529382 parent signature: d68a4509c093a8206ca15aec40bdf61b2ac99388f7cdaf859655c60f15a1aa74 revisions tested: 19, total time: 5h55m37.190361234s (build: 1h39m53.026607591s, test: 3h49m18.154878679s) first good commit: f92832262718443feb4e5df2bf70424ba842629e usb: atm: ueagle-atm: reject descriptors that confuse probe and disconnect recipients (to): ["diegomancera.dev@gmail.com" "gregkh@linuxfoundation.org" "sashal@kernel.org" "stf_xl@wp.pl"] recipients (cc): []