ci starts bisection 2025-07-31 04:56:54.558436449 +0000 UTC m=+136722.070928482 bisecting cause commit starting from e8d780dcd957d80725ad5dd00bab53b856429bc0 building syzkaller on f8f2b4da0e6eaaf0aeed6f6d613d86d599aafcd3 ensuring issue is reproducible on original commit e8d780dcd957d80725ad5dd00bab53b856429bc0 testing commit e8d780dcd957d80725ad5dd00bab53b856429bc0 gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2b02fc4e6aba26de397b47706c9aef7bc49e2ef2fa6959671ca0dd285a9f6b7c all runs: crashed: WARNING in convert_ctx_accesses representative crash: WARNING in convert_ctx_accesses, types: [WARNING] check whether we can drop unnecessary instrumentation disabling configs for [atomic_sleep hang memleak ubsan kasan locking], they are not needed testing commit e8d780dcd957d80725ad5dd00bab53b856429bc0 gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1f1269683614a6fdbb3db473927aa96c4e5e1605c348bd5d2a552e22c25f5bf2 all runs: crashed: WARNING in convert_ctx_accesses representative crash: WARNING in convert_ctx_accesses, types: [WARNING] the bug reproduces without the instrumentation disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed kconfig minimization: base=4089 full=8474 leaves diff=2164 split chunks (needed=false): <2164> split chunk #0 of len 2164 into 5 parts testing without sub-chunk 1/5 disabling configs for [memleak ubsan kasan locking atomic_sleep hang], they are not needed testing commit e8d780dcd957d80725ad5dd00bab53b856429bc0 gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 67dc549138d61bf973c714fb903bb859c861d129cc415ece03407832beaabfba all runs: crashed: WARNING in convert_ctx_accesses representative crash: WARNING in convert_ctx_accesses, types: [WARNING] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed testing commit e8d780dcd957d80725ad5dd00bab53b856429bc0 gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: dd9f952b3f5d1294bcfb76017437afecfcd1a5d03616bfa184cb9df0975a766e all runs: crashed: WARNING in convert_ctx_accesses representative crash: WARNING in convert_ctx_accesses, types: [WARNING] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [locking atomic_sleep hang memleak ubsan kasan], they are not needed testing commit e8d780dcd957d80725ad5dd00bab53b856429bc0 gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d78b5dba395507bcdafe1bedc3559773bf86db5bf3939dcd6013b323555bb977 all runs: crashed: WARNING in convert_ctx_accesses representative crash: WARNING in convert_ctx_accesses, types: [WARNING] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed testing commit e8d780dcd957d80725ad5dd00bab53b856429bc0 gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 277f11fc0b1defd9b2a3f12869be88c34c94b2a27e230de44641a246fe328da0 all runs: crashed: WARNING in convert_ctx_accesses representative crash: WARNING in convert_ctx_accesses, types: [WARNING] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit e8d780dcd957d80725ad5dd00bab53b856429bc0 gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a773fa3ea2e03cff1d3a70ad4b7d49680f6b496cb3ce72aa79d3b2467a83f682 all runs: OK false negative chance: 0.000 minimized to 432 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 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 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_MIDI2 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_F_ACM USB_F_ECM USB_F_EEM USB_F_FS USB_F_HID USB_F_MASS_STORAGE USB_F_MIDI USB_F_MIDI2 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 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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_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_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_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 X86_X32_ABI 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 [memleak ubsan kasan locking atomic_sleep hang], 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: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 235fc71f93db01582ad9ae344d138950d6cabdd66dbf98bfc86402de15bf32cb all runs: OK false negative chance: 0.000 # git bisect start e8d780dcd957d80725ad5dd00bab53b856429bc0 038d61fd642278bab63ee8ef722c50d10ab01e8f Bisecting: 3355 revisions left to test after this (roughly 12 steps) [115e74a29b530d121891238e9551c4bcdf7b04b5] Merge tag 'soc-dt-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc testing commit 115e74a29b530d121891238e9551c4bcdf7b04b5 gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: cc677709b31308534c71bd5aea1473a95df87c85b47c2ed7e6dcde676cf9b481 all runs: OK false negative chance: 0.000 # git bisect good 115e74a29b530d121891238e9551c4bcdf7b04b5 Bisecting: 1600 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: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7dadf47b231563970d311c2f82eaf68998b41da88bad742f8f93a82a45a8d6ce all runs: OK false negative chance: 0.000 # git bisect good 126d85fb040559ba6654f51c0b587d280b041abb Bisecting: 802 revisions left to test after this (roughly 10 steps) [bf76f23aa1c178e9115eba17f699fa726aed669b] Merge tag 'sched-core-2025-07-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip testing commit bf76f23aa1c178e9115eba17f699fa726aed669b gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: dd7c50fa1c60c703bbfc346277d7a5dc04bd81befe58dbe5071bd802f0ac3367 all runs: OK false negative chance: 0.000 # git bisect good bf76f23aa1c178e9115eba17f699fa726aed669b Bisecting: 347 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: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f3203387e26237ab8336a9fabf6b6ef9fa80c00b4c2a4128294244b4cf6c01b1 all runs: OK false negative chance: 0.000 # git bisect good 8be4d31cb8aaeea27bde4b7ddb26e28a89062ebf Bisecting: 173 revisions left to test after this (roughly 8 steps) [2b1fd82cbaffef05a35bd04ba2d62d96f4d8a622] Merge branch 'bpf-arena-add-kfunc-for-reserving-arena-memory' testing commit 2b1fd82cbaffef05a35bd04ba2d62d96f4d8a622 gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2834a3d11abc95d72fd6a1a12950dab52a63bdd9a244808d77ba8e0747950b88 all runs: crashed: WARNING in convert_ctx_accesses representative crash: WARNING in convert_ctx_accesses, types: [WARNING] # git bisect bad 2b1fd82cbaffef05a35bd04ba2d62d96f4d8a622 Bisecting: 86 revisions left to test after this (roughly 7 steps) [d69bafe6ee2b5eff6099fa26626ecc2963f0f363] selftests/bpf: Fix usdt multispec failure with arm64/clang20 selftest build testing commit d69bafe6ee2b5eff6099fa26626ecc2963f0f363 gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 49ed3c7a96c3b247ae2c962a07d02b29cd4d6186901c79d1ba3f2984038258aa all runs: OK false negative chance: 0.000 # git bisect good d69bafe6ee2b5eff6099fa26626ecc2963f0f363 Bisecting: 42 revisions left to test after this (roughly 6 steps) [1f24c0d819903cc30145d5fd8387f93ef637a62a] Merge branch 'bpf-add-bpf_dynptr_memset-kfunc' testing commit 1f24c0d819903cc30145d5fd8387f93ef637a62a gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 558365a8c5f6fbde84e71e3fa57ce76bda64c0f6af58d19d5f0a5051d0838cd1 all runs: crashed: WARNING in convert_ctx_accesses representative crash: WARNING in convert_ctx_accesses, types: [WARNING] # git bisect bad 1f24c0d819903cc30145d5fd8387f93ef637a62a Bisecting: 19 revisions left to test after this (roughly 5 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: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4dd5da63093706083eb7740e0c2181c51aa94ee1076ac3cb86642580ef5ddd4a all runs: OK false negative chance: 0.000 # git bisect good 48d998af99f9e78ac8a8e405c50a7af64a5325a6 Bisecting: 9 revisions left to test after this (roughly 3 steps) [cce3fee729ee18caa03bade7f4c360343e863bb1] selftests/bpf: Enable dynptr/test_probe_read_user_str_dynptr testing commit cce3fee729ee18caa03bade7f4c360343e863bb1 gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 10d8111b3d1673c8125e3d92c3f92702dbd4ebadfb40f042d861b470857f9916 all runs: crashed: WARNING in convert_ctx_accesses representative crash: WARNING in convert_ctx_accesses, types: [WARNING] # git bisect bad cce3fee729ee18caa03bade7f4c360343e863bb1 Bisecting: 4 revisions left to test after this (roughly 2 steps) [c4b1be928ea05add0e0f9334e5bc44932395782e] selftests/bpf: bpf_rdonly_cast u{8,16,32,64} access tests testing commit c4b1be928ea05add0e0f9334e5bc44932395782e gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: bdc2c0350f5c79c5ea0e79e1d4f59d3c108854ae988129ce1385370a0b702242 all runs: OK false negative chance: 0.000 # git bisect good c4b1be928ea05add0e0f9334e5bc44932395782e Bisecting: 2 revisions left to test after this (roughly 1 step) [e26d523edf2a62b142d2dd2dd9b87f61ed92f33a] s390/bpf: Describe the frame using a struct instead of constants testing commit e26d523edf2a62b142d2dd2dd9b87f61ed92f33a gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 57ef67630cfd9eb06fea6c2f1b86d42f7dcd3f8dc1bc74e0d4556b385e73a031 all runs: OK false negative chance: 0.000 # git bisect good e26d523edf2a62b142d2dd2dd9b87f61ed92f33a Bisecting: 0 revisions left to test after this (roughly 1 step) [0df1a55afa832f463f9ad68ddc5de92230f1bc8a] bpf: Warn on internal verifier errors testing commit 0df1a55afa832f463f9ad68ddc5de92230f1bc8a gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a511411084b8b1ac6b8e83482e254af21ea64f45e4ca1ba8ee4ca4a41250b246 all runs: crashed: WARNING in convert_ctx_accesses representative crash: WARNING in convert_ctx_accesses, types: [WARNING] # git bisect bad 0df1a55afa832f463f9ad68ddc5de92230f1bc8a Bisecting: 0 revisions left to test after this (roughly 0 steps) [26d0e5324677dc0acce4c0fda52316154a1d689e] Merge branch 's390-bpf-describe-the-frame-using-a-struct-instead-of-constants' testing commit 26d0e5324677dc0acce4c0fda52316154a1d689e gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2ba91bcdd2e01f9532869d4ff3c4c834bf66176e66a58a43499c501ed570d119 all runs: OK false negative chance: 0.000 # git bisect good 26d0e5324677dc0acce4c0fda52316154a1d689e 0df1a55afa832f463f9ad68ddc5de92230f1bc8a is the first bad commit commit 0df1a55afa832f463f9ad68ddc5de92230f1bc8a Author: Paul Chaignon Date: Tue Jul 1 20:36:15 2025 +0200 bpf: Warn on internal verifier errors This patch is a follow up to commit 1cb0f56d9618 ("bpf: WARN_ONCE on verifier bugs"). It generalizes the use of verifier_error throughout the verifier, in particular for logs previously marked "verifier internal error". As a consequence, all of those verifier bugs will now come with a kernel warning (under CONFIG_DBEUG_KERNEL) detectable by fuzzers. While at it, some error messages that were too generic (ex., "bpf verifier is misconfigured") have been reworded. Signed-off-by: Paul Chaignon Link: https://lore.kernel.org/r/aGQqnzMyeagzgkCK@Tunnel Signed-off-by: Alexei Starovoitov kernel/bpf/verifier.c | 211 ++++++++++++++++++++++++-------------------------- 1 file changed, 102 insertions(+), 109 deletions(-) accumulated error probability: 0.00 culprit signature: a511411084b8b1ac6b8e83482e254af21ea64f45e4ca1ba8ee4ca4a41250b246 parent signature: 2ba91bcdd2e01f9532869d4ff3c4c834bf66176e66a58a43499c501ed570d119 revisions tested: 21, total time: 8h45m7.179995947s (build: 4h51m11.799726629s, test: 2h43m8.626477226s) first bad commit: 0df1a55afa832f463f9ad68ddc5de92230f1bc8a bpf: Warn on internal verifier errors recipients (to): ["ast@kernel.org" "ast@kernel.org" "bpf@vger.kernel.org" "daniel@iogearbox.net" "paul.chaignon@gmail.com"] recipients (cc): ["andrii@kernel.org" "eddyz87@gmail.com" "haoluo@google.com" "john.fastabend@gmail.com" "jolsa@kernel.org" "kpsingh@kernel.org" "linux-kernel@vger.kernel.org" "martin.lau@linux.dev" "sdf@fomichev.me" "song@kernel.org" "yonghong.song@linux.dev"] crash: WARNING in convert_ctx_accesses ------------[ cut here ]------------ verifier bug: error during ctx access conversion(1) WARNING: CPU: 1 PID: 3894 at kernel/bpf/verifier.c:21364 convert_ctx_accesses+0x9f3/0xbe0 kernel/bpf/verifier.c:21364 Modules linked in: CPU: 1 UID: 0 PID: 3894 Comm: syz.2.16 Not tainted 6.16.0-rc3-syzkaller #0 PREEMPT(undef) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:convert_ctx_accesses+0x9f3/0xbe0 kernel/bpf/verifier.c:21364 Code: 80 06 00 00 48 c7 c6 a0 db f9 82 e8 57 25 02 00 e9 9c fe ff ff c6 05 50 c2 2d 02 01 90 48 c7 c7 68 dc f9 82 e8 5e 96 e5 ff 90 <0f> 0b 90 90 e9 80 fc ff ff 80 3d 37 c2 2d 02 00 0f 84 b0 00 00 00 RSP: 0018:ffffc9000743bb08 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff888114ef0000 RCX: 0000000000000000 RDX: 0000000000000002 RSI: 0000000000000001 RDI: 00000000ffffffff RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000003 R10: ffffc9000743b9a0 R11: ffffffff835943c8 R12: 0000000000000013 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fe7b0ebf6c0(0000) GS:ffff8882b399b000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe7b0ebef98 CR3: 0000000123c61000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: bpf_check+0x1555/0x3010 kernel/bpf/verifier.c:24655 bpf_prog_load+0x6f4/0xc50 kernel/bpf/syscall.c:2972 __sys_bpf+0x22bc/0x2300 kernel/bpf/syscall.c:5978 __do_sys_bpf kernel/bpf/syscall.c:6085 [inline] __se_sys_bpf kernel/bpf/syscall.c:6083 [inline] __x64_sys_bpf+0x19/0x30 kernel/bpf/syscall.c:6083 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xb6/0x3e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe7b144e9a9 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:00007fe7b0ebf038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fe7b1675fa0 RCX: 00007fe7b144e9a9 RDX: 0000000000000048 RSI: 00002000000054c0 RDI: 0000000000000005 RBP: 00007fe7b14d0d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007fe7b1675fa0 R15: 00007ffc6fa05618