ci2 starts bisection 2026-09-23 21:11:54.754329146 +0000 UTC m=+38334.888167067 bisecting fixing commit since e4f7d8be268ecf717f94ee2e242afa79ddeacaed building syzkaller on 1e72964b0111319984575e60f266d1fa0a98abb5 ensuring issue is reproducible on original commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed testing commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 7f2ece06df5a54843015ec6f8af520447edebb280505c54eb7c1f8f0791e0be4 run #0: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #1: crashed: WARNING in usbatm_usb_disconnect run #2: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #3: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #4: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #5: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #6: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #7: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #8: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #9: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #10: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #11: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #12: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #13: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #14: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #15: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #16: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #17: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #18: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #19: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect representative crash: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect, types: [KASAN-READ] check whether we can drop unnecessary instrumentation disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed testing commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: b11fb2d3e7639943d6ec451125cab6fddc86a0d359baa8d0894802b0dc29e000 all runs: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect representative crash: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect, types: [KASAN-READ] the bug reproduces without the instrumentation disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning locking], they are not needed kconfig minimization: base=3829 full=7621 leaves diff=2129 split chunks (needed=false): <2129> split chunk #0 of len 2129 into 5 parts testing without sub-chunk 1/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 2a721dc7f0822120abd0a5383645cab29942f709d22e20a91368c9bce8fc736c all runs: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect representative crash: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect, types: [KASAN-READ] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning locking], they are not needed testing commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 505bf8d780359bba1deab57cd11b6d1aaf1bd0d053b82efa4e144f6ba898b200 all runs: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect representative crash: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect, types: [KASAN-READ] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 1865b9c5ff42a3839ef0deda2d813465e03ee7b9f87a85d1c04c1f609b040460 all runs: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect representative crash: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect, types: [KASAN-READ] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed testing commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 32051d03e64ddfe057d8b983abad0038530db3d246e4ad69eeac696fec335ca7 all runs: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect representative crash: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect, types: [KASAN-READ] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed testing commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: cf6ec8eaaaf52270a32b6a922d07fa9098f2b07ed67c3625338c72b4b0ff06c8 all runs: OK false negative chance: 0.000 minimized to 425 configs; suspects: [ARCH_ENABLE_MEMORY_HOTREMOVE ATM BCMA BLK_DEV_ZONED BPF_SYSCALL CARDBUS CFG80211 CFG80211_WEXT CMA COMMON_CLK CONTIG_ALLOC CRYPTO_842 CRYPTO_LZ4 CRYPTO_LZ4HC CRYPTO_LZO CRYPTO_ZSTD DVB_CORE EXTCON FB GPIOLIB HID_ZEROPLUS I2C_MUX IIO IRQ_REMAP KVM KVM_INTEL LIBNVDIMM MEDIA_ANALOG_TV_SUPPORT MEDIA_CAMERA_SUPPORT MEDIA_CEC_SUPPORT MEDIA_CONTROLLER MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_VIPERBOARD NOP_USB_XCEIV PARPORT PCCARD PCMCIA PHONET RADIO_ADAPTERS RADIO_SI470X RADIO_SI4713 RC_CORE RFKILL SND SOUND SPI SSB TAP TARGET_CORE TUN USB_AMD5536UDC USB_ATM 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_RTL8150 USB_RTL8152 USB_RTL8153_ECM USB_S2255 USB_SERIAL USB_SERIAL_AIRCABLE USB_SERIAL_ARK3116 USB_SERIAL_BELKIN USB_SERIAL_CH341 USB_SERIAL_CONSOLE USB_SERIAL_CP210X USB_SERIAL_CYBERJACK USB_SERIAL_CYPRESS_M8 USB_SERIAL_DEBUG USB_SERIAL_DIGI_ACCELEPORT USB_SERIAL_EDGEPORT USB_SERIAL_EDGEPORT_TI USB_SERIAL_EMPEG USB_SERIAL_F81232 USB_SERIAL_F8153X USB_SERIAL_FTDI_SIO USB_SERIAL_GARMIN USB_SERIAL_GENERIC USB_SERIAL_IPAQ USB_SERIAL_IPW USB_SERIAL_IR USB_SERIAL_IUU USB_SERIAL_KEYSPAN USB_SERIAL_KEYSPAN_PDA USB_SERIAL_KLSI USB_SERIAL_KOBIL_SCT USB_SERIAL_MCT_U232 USB_SERIAL_METRO USB_SERIAL_MOS7715_PARPORT USB_SERIAL_MOS7720 USB_SERIAL_MOS7840 USB_SERIAL_MXUPORT USB_SERIAL_NAVMAN USB_SERIAL_OMNINET USB_SERIAL_OPTICON USB_SERIAL_OPTION USB_SERIAL_OTI6858 USB_SERIAL_PL2303 USB_SERIAL_QCAUX USB_SERIAL_QT2 USB_SERIAL_QUALCOMM USB_SERIAL_SAFE USB_SERIAL_SIERRAWIRELESS USB_SERIAL_SIMPLE USB_SERIAL_SPCP8X5 USB_SERIAL_SSU100 USB_SERIAL_SYMBOL USB_SERIAL_TI USB_SERIAL_UPD78F0730 USB_SERIAL_VISOR USB_SERIAL_WHITEHEAT USB_SERIAL_WISHBONE USB_SERIAL_WWAN USB_SERIAL_XR USB_SERIAL_XSENS_MT USB_SEVSEG USB_SI470X USB_SI4713 USB_SIERRA_NET USB_SISUSBVGA USB_SL811_CS USB_SL811_HCD USB_SL811_HCD_ISO USB_SNP_CORE USB_SPEEDTOUCH USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_ENE_UB6250 USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_STV06XX USB_TEST USB_TMC USB_TRANCEVIBRATOR USB_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 WANT_DEV_COREDUMP WEXT_CORE WEXT_PRIV WEXT_PROC WIREGUARD WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ADMTEK 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_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 ZLIB_DEFLATE 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 [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed testing current HEAD 1a8763b93150b2c8f3992c27a5ce7857fee4ab0f testing commit 1a8763b93150b2c8f3992c27a5ce7857fee4ab0f gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: d7317a0a6b282754cfa0562d9e616950ea33466d0d23d62e145e5893202fa77b all runs: OK false negative chance: 0.000 # git bisect start 1a8763b93150b2c8f3992c27a5ce7857fee4ab0f e4f7d8be268ecf717f94ee2e242afa79ddeacaed Bisecting: 1136 revisions left to test after this (roughly 10 steps) [ec896c5fbdd320e12c81dd9bec69725abc3616c4] nfsd: add filehandle match check to nfsd4_delegreturn() determine whether the revision contains the guilty commit revision e4f7d8be268ecf717f94ee2e242afa79ddeacaed crashed and is reachable testing commit ec896c5fbdd320e12c81dd9bec69725abc3616c4 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 349b1f2048f9a8b1f08d5affa70d0ddf66351ba121c6a21b6e436aa73e899575 all runs: OK false negative chance: 0.000 # git bisect bad ec896c5fbdd320e12c81dd9bec69725abc3616c4 Bisecting: 568 revisions left to test after this (roughly 9 steps) [e00f7d2b5f2540a3415a229c982af7a25ff6362e] ipv4: fix use-after-free in fib_nhc_update_mtu() determine whether the revision contains the guilty commit revision e4f7d8be268ecf717f94ee2e242afa79ddeacaed crashed and is reachable testing commit e00f7d2b5f2540a3415a229c982af7a25ff6362e gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 4c34f487fa0b58b2ef7e9e8e8f7cff07e52a596df6e5febab27d0ab1e21dfbe1 all runs: OK false negative chance: 0.000 # git bisect bad e00f7d2b5f2540a3415a229c982af7a25ff6362e Bisecting: 283 revisions left to test after this (roughly 8 steps) [81c9b4921f62d1642b9d775524ae9240e521a5ed] drm/amdgpu: fix division by zero with invalid uvd dimensions determine whether the revision contains the guilty commit revision e4f7d8be268ecf717f94ee2e242afa79ddeacaed crashed and is reachable testing commit 81c9b4921f62d1642b9d775524ae9240e521a5ed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: d9416a3d312000cc17cd90064743f756c723e792db88311419d5057db5021cda all runs: OK false negative chance: 0.000 # git bisect bad 81c9b4921f62d1642b9d775524ae9240e521a5ed Bisecting: 141 revisions left to test after this (roughly 7 steps) [9cd8c88e1336ec0fbe02af1ddf2b52838d30fae4] tipc: fix infinite loop in __tipc_nl_compat_dumpit determine whether the revision contains the guilty commit revision e4f7d8be268ecf717f94ee2e242afa79ddeacaed crashed and is reachable testing commit 9cd8c88e1336ec0fbe02af1ddf2b52838d30fae4 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: d0524cc5cf68cc08a2cbe287f8a048a5384366b12e16678d70245f1dfeef342c all runs: OK false negative chance: 0.000 # git bisect bad 9cd8c88e1336ec0fbe02af1ddf2b52838d30fae4 Bisecting: 70 revisions left to test after this (roughly 6 steps) [ee5e65964f456adfe14d526fba0bd055de98ecf3] sctp: fix auth_hmacs array size in struct sctp_cookie determine whether the revision contains the guilty commit revision e4f7d8be268ecf717f94ee2e242afa79ddeacaed crashed and is reachable testing commit ee5e65964f456adfe14d526fba0bd055de98ecf3 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 1dde69e8399d7a9bda0f7addc3ea9c29cea18b5dc439e43bcf3585afb458cfc1 all runs: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect representative crash: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect, types: [KASAN-READ] # git bisect good ee5e65964f456adfe14d526fba0bd055de98ecf3 Bisecting: 35 revisions left to test after this (roughly 5 steps) [268cea3800eda5fa3ee04a49ee2973b8766a8df3] firewire: net: Fix fragmented datagram reassembly determine whether the revision contains the guilty commit revision e4f7d8be268ecf717f94ee2e242afa79ddeacaed crashed and is reachable testing commit 268cea3800eda5fa3ee04a49ee2973b8766a8df3 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: e48569a05e91f9d29987d0140cb118e5ac93eb8795fe703cb73d2e3e591abe34 all runs: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect representative crash: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect, types: [KASAN-READ] # git bisect good 268cea3800eda5fa3ee04a49ee2973b8766a8df3 Bisecting: 17 revisions left to test after this (roughly 4 steps) [03c574112e5d066df0ddce36d7438e850bcf3050] rds: drop incoming messages that cross network namespace boundaries determine whether the revision contains the guilty commit revision ee5e65964f456adfe14d526fba0bd055de98ecf3 crashed and is reachable testing commit 03c574112e5d066df0ddce36d7438e850bcf3050 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 36a41ea10327020f73ebd2e71357ad5b52aa8d2688c6fed3b1cba25c71c4689d all runs: OK false negative chance: 0.000 # git bisect bad 03c574112e5d066df0ddce36d7438e850bcf3050 Bisecting: 8 revisions left to test after this (roughly 3 steps) [efc977e0dbeb64a20b915891348bb22f897c0fe3] wifi: iwlwifi: mvm: fix read in wake packet notification handler determine whether the revision contains the guilty commit revision ee5e65964f456adfe14d526fba0bd055de98ecf3 crashed and is reachable testing commit efc977e0dbeb64a20b915891348bb22f897c0fe3 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 5849b316a85d4b9ee10ec01fda797cd498aa7730783d73bccb2d375733b21a77 run #0: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #1: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #2: crashed: KASAN: use-after-free Read in usbatm_usb_disconnect run #3: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #4: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #5: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #6: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #7: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #8: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect run #9: crashed: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect representative crash: KASAN: slab-out-of-bounds Read in usbatm_usb_disconnect, types: [KASAN-READ] # git bisect good efc977e0dbeb64a20b915891348bb22f897c0fe3 Bisecting: 4 revisions left to test after this (roughly 2 steps) [d3aaf59d87ca6d417104e52c491b7c92903de00b] hwmon: (asus-ec-sensors) add missed handle for ENOMEM determine whether the revision contains the guilty commit revision e4f7d8be268ecf717f94ee2e242afa79ddeacaed crashed and is reachable testing commit d3aaf59d87ca6d417104e52c491b7c92903de00b gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 336b5e5572567c461d07ac66d787ab6fd61b3a986bb032190a4abc28e86c8d54 all runs: OK false negative chance: 0.000 # git bisect bad d3aaf59d87ca6d417104e52c491b7c92903de00b Bisecting: 1 revision left to test after this (roughly 1 step) [65f168b0c08326c1b9840e3f8d3fd1ce12e2c82d] hwmon: (asus-ec-sensors) fix looping over banks while reading from EC determine whether the revision contains the guilty commit revision e4f7d8be268ecf717f94ee2e242afa79ddeacaed crashed and is reachable testing commit 65f168b0c08326c1b9840e3f8d3fd1ce12e2c82d gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 069c53557da0b5f2111b000b96306d8ad11989a240a681f2fd6ba1b1fd190ebe all runs: OK false negative chance: 0.000 # git bisect bad 65f168b0c08326c1b9840e3f8d3fd1ce12e2c82d Bisecting: 0 revisions left to test after this (roughly 0 steps) [e814ae925f6f575325124c29dde518b92c822b83] usb: atm: ueagle-atm: reject descriptors that confuse probe and disconnect determine whether the revision contains the guilty commit revision e4f7d8be268ecf717f94ee2e242afa79ddeacaed crashed and is reachable testing commit e814ae925f6f575325124c29dde518b92c822b83 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 45054e2474e042a69d82278226c1d7021e81a24132893b819d6efd63a012f131 all runs: OK false negative chance: 0.000 # git bisect bad e814ae925f6f575325124c29dde518b92c822b83 e814ae925f6f575325124c29dde518b92c822b83 is the first bad commit commit e814ae925f6f575325124c29dde518b92c822b83 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: 45054e2474e042a69d82278226c1d7021e81a24132893b819d6efd63a012f131 parent signature: 5849b316a85d4b9ee10ec01fda797cd498aa7730783d73bccb2d375733b21a77 revisions tested: 19, total time: 4h20m55.675909401s (build: 1h14m37.179206501s, test: 2h43m5.870087089s) first good commit: e814ae925f6f575325124c29dde518b92c822b83 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): []