ci starts bisection 2025-09-15 16:48:45.294721607 +0000 UTC m=+334007.681470036 bisecting cause commit starting from f83ec76bf285bea5727f478a68b894f5543ca76e building syzkaller on e2beed91937c0ace342f19a2e9afb67adb3a828a ensuring issue is reproducible on original commit f83ec76bf285bea5727f478a68b894f5543ca76e testing commit f83ec76bf285bea5727f478a68b894f5543ca76e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: dea893b604121ff6c88e46e986c3904b291b5621591037a40ddfddd4dd3e1ba4 all runs: crashed: WARNING in do_check representative crash: WARNING in do_check, types: [WARNING] check whether we can drop unnecessary instrumentation disabling configs for [locking atomic_sleep hang memleak ubsan kasan], they are not needed testing commit f83ec76bf285bea5727f478a68b894f5543ca76e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 2113ee40597fd417f29f47aa7037bd07aef170ac43b214793cc4df12249a312c all runs: crashed: WARNING in do_check representative crash: WARNING in do_check, types: [WARNING] the bug reproduces without the instrumentation disabling configs for [memleak ubsan kasan locking atomic_sleep hang], they are not needed kconfig minimization: base=4099 full=8510 leaves diff=2194 split chunks (needed=false): <2194> split chunk #0 of len 2194 into 5 parts testing without sub-chunk 1/5 disabling configs for [atomic_sleep hang memleak ubsan kasan locking], they are not needed testing commit f83ec76bf285bea5727f478a68b894f5543ca76e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: bc9cf678f389824a8c54412133b2625c7730eba04a38eb399737d2ba07c1724e all runs: crashed: WARNING in do_check representative crash: WARNING in do_check, types: [WARNING] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit f83ec76bf285bea5727f478a68b894f5543ca76e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: a18c615851b2907b3fddc78b92210677a5364467860f20613b31740075ab4375 all runs: crashed: WARNING in do_check representative crash: WARNING in do_check, types: [WARNING] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [memleak ubsan kasan locking atomic_sleep hang], they are not needed testing commit f83ec76bf285bea5727f478a68b894f5543ca76e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0a332376d776ec1b67f048f2484198bff7cad58234dfc7b8f2468f6358b6e41a all runs: crashed: WARNING in do_check representative crash: WARNING in do_check, types: [WARNING] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [memleak ubsan kasan locking atomic_sleep hang], they are not needed testing commit f83ec76bf285bea5727f478a68b894f5543ca76e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 8862fd1e9212dc5190da112461fc5efd997e3a3810850f7e028b3ad5972c15b0 all runs: crashed: WARNING in do_check representative crash: WARNING in do_check, types: [WARNING] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed testing commit f83ec76bf285bea5727f478a68b894f5543ca76e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 47b4c4c2aba1429526c3303698aa076c115d6f62164ed31582c607b7c8d3afd2 all runs: OK false negative chance: 0.000 minimized to 438 configs; suspects: [ARCH_ENABLE_MEMORY_HOTREMOVE ATM BCMA BLK_DEV_ZONED BPF_SYSCALL CARDBUS CFG80211 CFG80211_WEXT CMA COMMON_CLK CONTIG_ALLOC DVB_CORE EXTCON GPIOLIB HID_ZEROPLUS I2C_MUX IIO IOMMUFD 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 USBIP_CORE 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_CDNS2_UDC 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_NPCM USB_CHIPIDEA_PCI 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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_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_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_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 UVC_COMMON U_SERIAL_CONSOLE V4L2_ASYNC V4L2_FWNODE V4L2_MEM2MEM_DEV V4L_TEST_DRIVERS VALIDATE_FS_PARSER VDPA VDPA_SIM VDPA_SIM_BLOCK VDPA_SIM_NET VETH VFIO VFIO_DEVICE_CDEV VFIO_PCI VFIO_PCI_CORE VFIO_PCI_INTX VFIO_VIRQFD VGASTATE VHOST VHOST_CROSS_ENDIAN_LEGACY VHOST_ENABLE_FORK_OWNER_CONTROL VHOST_IOTLB VHOST_NET VHOST_RING VHOST_TASK VHOST_VDPA VHOST_VSOCK VIDEO 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_CAMERA_LENS 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_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_PROC WIREGUARD WIRELESS WLAN WLAN_VENDOR_ADMTEK WLAN_VENDOR_SILABS X86_SGX X86_SGX_KVM X86_USER_SHADOW_STACK 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 ZEROPLUS_FF ZLIB_DEFLATE ZONEFS_FS ZPOOL ZRAM ZRAM_BACKEND_FORCE_LZO ZRAM_BACKEND_LZO ZRAM_DEF_COMP_LZO ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_842 ZSWAP_DEFAULT_ON ZSWAP_SHRINKER_DEFAULT_ON ZSWAP_ZPOOL_DEFAULT_ZSMALLOC] disabling configs for [kasan locking atomic_sleep hang memleak ubsan], they are not needed picked [v6.16 v6.15 v6.14 v6.12 v6.10 v6.8 v6.6 v6.4 v6.1 v5.18 v5.15 v5.12 v5.9 v5.6 v5.3 v5.0 v4.19] out of 39 release tags testing release v6.16 testing commit 038d61fd642278bab63ee8ef722c50d10ab01e8f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0890be5c65e6f1ad39790437c1a58242a4c4df689f5d3e96bbbf4eb1e92f3829 all runs: OK false negative chance: 0.000 # git bisect start f83ec76bf285bea5727f478a68b894f5543ca76e 038d61fd642278bab63ee8ef722c50d10ab01e8f Bisecting: 7041 revisions left to test after this (roughly 13 steps) [7d767a9528f6d203bca5e83faf1b8f2f6af3fc07] Merge tag 'for-linus-6.17-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip testing commit 7d767a9528f6d203bca5e83faf1b8f2f6af3fc07 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 365937c17c501566350e0d039d775ef883b6858897138e6045ddc3fb2f16d5cc all runs: crashed: WARNING in do_check representative crash: WARNING in do_check, types: [WARNING] # git bisect bad 7d767a9528f6d203bca5e83faf1b8f2f6af3fc07 Bisecting: 3345 revisions left to test after this (roughly 12 steps) [0f46f50845ce75bfaba62df0421084d23bb6a72f] Merge tag 'soc-drivers-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc testing commit 0f46f50845ce75bfaba62df0421084d23bb6a72f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 1b5eae0c5f7a3b26a54a763c0c8d823f2f7d01ca6b7c2c5158152fd99b31fba2 all runs: OK false negative chance: 0.000 # git bisect good 0f46f50845ce75bfaba62df0421084d23bb6a72f Bisecting: 1590 revisions left to test after this (roughly 11 steps) [126d85fb040559ba6654f51c0b587d280b041abb] Merge tag 'wireless-next-2025-07-24' of https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next testing commit 126d85fb040559ba6654f51c0b587d280b041abb gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 7bdbc47816d56e5448c95dab024c345f77c155dfce3d675713c23ee1bc0d6e94 all runs: OK false negative chance: 0.000 # git bisect good 126d85fb040559ba6654f51c0b587d280b041abb Bisecting: 814 revisions left to test after this (roughly 10 steps) [3bb38c52719baa7f9cdbf200016ed481b4498290] Merge tag 'm68k-for-v6.17-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k testing commit 3bb38c52719baa7f9cdbf200016ed481b4498290 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: c3f891f9adf976b1c91ffd20fbe4bd50d7001e6186828b40f7863a854d216b75 all runs: OK false negative chance: 0.000 # git bisect good 3bb38c52719baa7f9cdbf200016ed481b4498290 Bisecting: 457 revisions left to test after this (roughly 9 steps) [8be4d31cb8aaeea27bde4b7ddb26e28a89062ebf] Merge tag 'net-next-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next testing commit 8be4d31cb8aaeea27bde4b7ddb26e28a89062ebf gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 38c729290380c7f6cc11ab01ddccfc6c8fb562e066d57198b71e0c037353e7f6 all runs: OK false negative chance: 0.000 # git bisect good 8be4d31cb8aaeea27bde4b7ddb26e28a89062ebf Bisecting: 234 revisions left to test after this (roughly 8 steps) [d9104cec3e8fe4b458b74709853231385779001f] Merge tag 'bpf-next-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next testing commit d9104cec3e8fe4b458b74709853231385779001f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 3cf494e68cf0727e3798b3ec35512afc9e5ffaea5fb45ce0b97dd285ab25c5af all runs: crashed: WARNING in do_check representative crash: WARNING in do_check, types: [WARNING] # git bisect bad d9104cec3e8fe4b458b74709853231385779001f Bisecting: 111 revisions left to test after this (roughly 7 steps) [48d998af99f9e78ac8a8e405c50a7af64a5325a6] Merge branch 'vfs-6.17.bpf' of https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs testing commit 48d998af99f9e78ac8a8e405c50a7af64a5325a6 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 8fe20d2fa656d624c11028a3e14745af8ef0c5d14d112573203d5f4211e4f1d3 all runs: OK false negative chance: 0.000 # git bisect good 48d998af99f9e78ac8a8e405c50a7af64a5325a6 Bisecting: 55 revisions left to test after this (roughly 6 steps) [92974cef83b560175fc52acb53aa833cb1e93306] selftests/bpf: Add Spectre v4 tests testing commit 92974cef83b560175fc52acb53aa833cb1e93306 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 09be3e1dd180bba454d455b0b6a8b8a733726dc0d4b257c39eacab7045e670eb all runs: crashed: WARNING in do_check representative crash: WARNING in do_check, types: [WARNING] # git bisect bad 92974cef83b560175fc52acb53aa833cb1e93306 Bisecting: 27 revisions left to test after this (roughly 5 steps) [f0c53fd4a742f957da7077a691a85ef9775907dc] bpf: Add function to find program from stack trace testing commit f0c53fd4a742f957da7077a691a85ef9775907dc gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: eb99850b4676b9e9a0b3fb00462e450a0cfdacc316ba8d85906acb09a141dd7f all runs: OK false negative chance: 0.000 # git bisect good f0c53fd4a742f957da7077a691a85ef9775907dc Bisecting: 13 revisions left to test after this (roughly 4 steps) [b9d44bc9fd30550052d0854d71b0c0731dc9f053] bpf: make makr_btf_ld_reg return error for unexpected reg types testing commit b9d44bc9fd30550052d0854d71b0c0731dc9f053 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0737225966a5b9f6eea3e61bb7f2cb4ee9c4c32c4d324cf25b3397b9aa403b35 all runs: OK false negative chance: 0.000 # git bisect good b9d44bc9fd30550052d0854d71b0c0731dc9f053 Bisecting: 6 revisions left to test after this (roughly 3 steps) [68cca81fd57fd9f5b8fd8da0dccd1d00522592f9] selftests/bpf: tests for __arg_untrusted void * global func params testing commit 68cca81fd57fd9f5b8fd8da0dccd1d00522592f9 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 9a88d74592b1ce2dcb0db86a9319cfb9ed1b2e1c8cfe6181f713bc8a31815b70 all runs: OK false negative chance: 0.000 # git bisect good 68cca81fd57fd9f5b8fd8da0dccd1d00522592f9 Bisecting: 2 revisions left to test after this (roughly 2 steps) [0074250c35a4ad9b21ee91b78f62906d8b7942bf] Merge branch 'bpf-streams-fixes' testing commit 0074250c35a4ad9b21ee91b78f62906d8b7942bf gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 7f256f42e1066d04ef4dd403f5ecc212774bb7c1f4f91f4d827ec2195d5c1b9c all runs: OK false negative chance: 0.000 # git bisect good 0074250c35a4ad9b21ee91b78f62906d8b7942bf Bisecting: 0 revisions left to test after this (roughly 1 step) [dadb59104c6441f54d0c42bba3e4bd11e25fc6d9] bpf: Fix aux usage after do_check_insn() testing commit dadb59104c6441f54d0c42bba3e4bd11e25fc6d9 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: aa5dcbe6594b8a3141ff1dd5435fa29ec0373b4746304c95e01b14ba3b81ba61 all runs: crashed: WARNING in do_check representative crash: WARNING in do_check, types: [WARNING] # git bisect bad dadb59104c6441f54d0c42bba3e4bd11e25fc6d9 Bisecting: 0 revisions left to test after this (roughly 0 steps) [0f626c98fd10330da0420029a1c4fa35e39fb873] selftests/bpf: Set CONFIG_PACKET=y for selftests testing commit 0f626c98fd10330da0420029a1c4fa35e39fb873 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 4c8677a1081bc4b41f2c438a4f678057001991a8ff79db79819d97b57a323678 all runs: OK false negative chance: 0.000 # git bisect good 0f626c98fd10330da0420029a1c4fa35e39fb873 dadb59104c6441f54d0c42bba3e4bd11e25fc6d9 is the first bad commit commit dadb59104c6441f54d0c42bba3e4bd11e25fc6d9 Author: Luis Gerhorst Date: Sat Jul 5 21:09:07 2025 +0200 bpf: Fix aux usage after do_check_insn() We must terminate the speculative analysis if the just-analyzed insn had nospec_result set. Using cur_aux() here is wrong because insn_idx might have been incremented by do_check_insn(). Therefore, introduce and use insn_aux variable. Also change cur_aux(env)->nospec in case do_check_insn() ever manages to increment insn_idx but still fail. Change the warning to check the insn class (which prevents it from triggering for ldimm64, for which nospec_result would not be problematic) and use verifier_bug_if(). In line with Eduard's suggestion, do not introduce prev_aux() because that requires one to understand that after do_check_insn() call what was current became previous. This would at-least require a comment. Fixes: d6f1c85f2253 ("bpf: Fall back to nospec for Spectre v1") Reported-by: Paul Chaignon Reported-by: Eduard Zingerman Reported-by: syzbot+dc27c5fb8388e38d2d37@syzkaller.appspotmail.com Link: https://lore.kernel.org/bpf/685b3c1b.050a0220.2303ee.0010.GAE@google.com/ Link: https://lore.kernel.org/bpf/4266fd5de04092aa4971cbef14f1b4b96961f432.camel@gmail.com/ Suggested-by: Eduard Zingerman Signed-off-by: Luis Gerhorst Acked-by: Eduard Zingerman Link: https://lore.kernel.org/r/20250705190908.1756862-2-luis.gerhorst@fau.de Signed-off-by: Alexei Starovoitov kernel/bpf/verifier.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) accumulated error probability: 0.00 culprit signature: aa5dcbe6594b8a3141ff1dd5435fa29ec0373b4746304c95e01b14ba3b81ba61 parent signature: 4c8677a1081bc4b41f2c438a4f678057001991a8ff79db79819d97b57a323678 revisions tested: 22, total time: 11h0m27.620097586s (build: 6h44m31.838081477s, test: 3h26m21.823714049s) first bad commit: dadb59104c6441f54d0c42bba3e4bd11e25fc6d9 bpf: Fix aux usage after do_check_insn() recipients (to): ["ast@kernel.org" "eddyz87@gmail.com" "luis.gerhorst@fau.de"] recipients (cc): [] crash: WARNING in do_check ------------[ cut here ]------------ verifier bug: scc exit: no visit info for call chain (1)(1) WARNING: CPU: 0 PID: 3942 at kernel/bpf/verifier.c:1950 maybe_exit_scc kernel/bpf/verifier.c:1949 [inline] WARNING: CPU: 0 PID: 3942 at kernel/bpf/verifier.c:1950 update_branch_counts kernel/bpf/verifier.c:2040 [inline] WARNING: CPU: 0 PID: 3942 at kernel/bpf/verifier.c:1950 do_check+0x2f99/0x3050 kernel/bpf/verifier.c:20088 Modules linked in: CPU: 0 UID: 0 PID: 3942 Comm: syz.2.17 Not tainted syzkaller #0 PREEMPT(undef) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:maybe_exit_scc kernel/bpf/verifier.c:1949 [inline] RIP: 0010:update_branch_counts kernel/bpf/verifier.c:2040 [inline] RIP: 0010:do_check+0x2f99/0x3050 kernel/bpf/verifier.c:20088 Code: 02 00 e9 14 ff ff ff c6 05 ac 01 46 02 01 90 48 89 df 4c 89 ee e8 57 20 00 00 48 c7 c7 94 70 1c 83 48 89 c6 e8 78 bb cc ff 90 <0f> 0b 90 90 e9 c9 fe ff ff e8 c9 49 36 01 c6 05 3a 01 46 02 01 90 RSP: 0018:ffffc900076e7a58 EFLAGS: 00010246 RAX: f1facec80f302a00 RBX: ffff888119370000 RCX: 0000000000000000 RDX: 0000000000000002 RSI: 00000000ffffdfff RDI: 00000000ffffffff RBP: ffff88811d089000 R08: 0000000000001fff R09: ffffffff836ad2f0 R10: 0000000000005ffd R11: 00000000ffffdfff R12: ffffc90000ea50a0 R13: ffff888119376328 R14: 0000000000000528 R15: 0000000000000000 FS: 00007f04f00af6c0(0000) GS:ffff8882b3701000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000003000 CR3: 0000000113d76000 CR4: 0000000000350ef0 Call Trace: do_check_common+0x319/0x830 kernel/bpf/verifier.c:23215 do_check_main kernel/bpf/verifier.c:23298 [inline] bpf_check+0xf45/0x5040 kernel/bpf/verifier.c:24654 bpf_prog_load+0x65c/0x6f0 kernel/bpf/syscall.c:2972 __sys_bpf+0x351/0x5a0 kernel/bpf/syscall.c:6007 __do_sys_bpf kernel/bpf/syscall.c:6117 [inline] __se_sys_bpf kernel/bpf/syscall.c:6115 [inline] __x64_sys_bpf+0x17/0x20 kernel/bpf/syscall.c:6115 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0x2f0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f04f023eba9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f04f00af038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f04f0485fa0 RCX: 00007f04f023eba9 RDX: 0000000000000048 RSI: 00002000000017c0 RDI: 0000000000000005 RBP: 00007f04f02c1e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f04f0486038 R14: 00007f04f0485fa0 R15: 00007ffc75a91598