ci starts bisection 2024-02-12 12:29:35.842374047 +0000 UTC m=+237120.510922593 bisecting cause commit starting from ae00c445390b349e070a64dc62f08aa878db7248 building syzkaller on 77b23aa147a898d1e1912a5f01e6716bbdc3a59e ensuring issue is reproducible on original commit ae00c445390b349e070a64dc62f08aa878db7248 testing commit ae00c445390b349e070a64dc62f08aa878db7248 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: dc9830ac2e87c61e40ebe231ece1fc4be508cba22b369c6cbc494875127ce782 all runs: crashed: possible deadlock in lock_vma representative crash: possible deadlock in lock_vma, types: [LOCKDEP] check whether we can drop unnecessary instrumentation disabling configs for [UBSAN BUG KASAN ATOMIC_SLEEP HANG LEAK], they are not needed testing commit ae00c445390b349e070a64dc62f08aa878db7248 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 50512094a1a5afb6f889abb0582b0cbb9b746a545d1e91b273fe5131570ff5e8 all runs: crashed: possible deadlock in lock_vma representative crash: possible deadlock in lock_vma, types: [LOCKDEP] the bug reproduces without the instrumentation disabling configs for [UBSAN BUG KASAN ATOMIC_SLEEP HANG LEAK], they are not needed kconfig minimization: base=3937 full=7988 leaves diff=2020 split chunks (needed=false): <2020> split chunk #0 of len 2020 into 5 parts testing without sub-chunk 1/5 disabling configs for [KASAN ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit ae00c445390b349e070a64dc62f08aa878db7248 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b504626b00e927398fa5a8afc861526cdecf80ab3eeef3ee718249ea62cebdfc all runs: crashed: possible deadlock in lock_vma representative crash: possible deadlock in lock_vma, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [LEAK UBSAN BUG KASAN ATOMIC_SLEEP HANG], they are not needed testing commit ae00c445390b349e070a64dc62f08aa878db7248 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2e1a0916b6dc4f04fb8c624bb358fe65c48f9e6169901e18b23acc4ca13d1bfe all runs: crashed: possible deadlock in lock_vma representative crash: possible deadlock in lock_vma, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [LEAK UBSAN BUG KASAN ATOMIC_SLEEP HANG], they are not needed testing commit ae00c445390b349e070a64dc62f08aa878db7248 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ff37912d873962ea97838419903749d2aa813ab57e60924e91b28b698a82680d all runs: crashed: possible deadlock in lock_vma representative crash: possible deadlock in lock_vma, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit ae00c445390b349e070a64dc62f08aa878db7248 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 73c8b67a24c301fe4bf3a0bef517af02d84920c81896c7e45a8b0884a58e0246 all runs: crashed: possible deadlock in lock_vma representative crash: possible deadlock in lock_vma, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit ae00c445390b349e070a64dc62f08aa878db7248 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e833874f63df3cb26e804ecc58f580b1107515073559dd1f1e09ba83c1635ab6 all runs: OK false negative chance: 0.000 minimized to 404 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 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 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_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_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_OF_SIMPLE USB_DWC3_PCI USB_DWC3_ULPI USB_DYNAMIC_MINORS USB_EG20T 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_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_LIBCOMPOSITE USB_LINK_LAYER_TEST USB_M5602 USB_MA901 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_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_PLATFORM USB_XUSBATM USB_YUREX USERFAULTFD USERIO USERMODE_DRIVER 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 VDPA_USER VETH VFIO VFIO_DEVICE_CDEV 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_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_PRIV WEXT_PROC WIREGUARD WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ADMTEK WLAN_VENDOR_PURELIFI WLAN_VENDOR_SILABS X86_AMD_PSTATE X86_SGX X86_SGX_KVM X86_USER_SHADOW_STACK X86_X2APIC 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 XOR_BLOCKS YENTA YENTA_ENE_TUNE YENTA_O2 YENTA_RICOH YENTA_TI YENTA_TOSHIBA ZEROPLUS_FF ZLIB_DEFLATE ZONEFS_FS ZPOOL ZRAM ZRAM_DEF_COMP_LZORLE ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_LZO ZSWAP_DEFAULT_ON ZSWAP_SHRINKER_DEFAULT_ON ZSWAP_ZPOOL_DEFAULT_ZSMALLOC] disabling configs for [HANG LEAK UBSAN BUG KASAN ATOMIC_SLEEP], they are not needed picked [v6.7 v6.6 v6.5 v6.3 v6.1 v5.19 v5.17 v5.15 v5.12 v5.9 v5.6 v5.3 v5.0 v4.19] out of 30 release tags testing release v6.7 testing commit 0dd3ee31125508cd67f7e7172247f05b7fd1753a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 377a10c84e6709fdf3003578d5350dd33a116278b99550e9bb61db9330fe91f9 all runs: OK false negative chance: 0.000 # git bisect start ae00c445390b349e070a64dc62f08aa878db7248 0dd3ee31125508cd67f7e7172247f05b7fd1753a Bisecting: 10271 revisions left to test after this (roughly 13 steps) [5aa1c96e8ef347430e7a7c898f290425d1b568ef] Merge branch 'master' into mm-hotfixes-stable testing commit 5aa1c96e8ef347430e7a7c898f290425d1b568ef gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2a14c4cec35bb9b67045f2cb4198c2820f075c2b25da7b8effc7244d66889d9e all runs: OK false negative chance: 0.000 # git bisect good 5aa1c96e8ef347430e7a7c898f290425d1b568ef Bisecting: 5195 revisions left to test after this (roughly 12 steps) [4515dce0d1ead9d31b81b3c5e423321e1bcbff18] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap.git testing commit 4515dce0d1ead9d31b81b3c5e423321e1bcbff18 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f475340ea0953dd9b1c303b795b988db5e2fffd0ef90d57b58f65e787e7f12c2 all runs: crashed: possible deadlock in lock_vma representative crash: possible deadlock in lock_vma, types: [LOCKDEP] # git bisect bad 4515dce0d1ead9d31b81b3c5e423321e1bcbff18 Bisecting: 2532 revisions left to test after this (roughly 11 steps) [24fdd5189914b36102cb51626a890a2d84501993] Merge tag 'loongarch-6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson testing commit 24fdd5189914b36102cb51626a890a2d84501993 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2e52aaedac34401d428c5a1ff4712db6de93eadd3b07a39fb39876a31bb7b33f all runs: OK false negative chance: 0.000 # git bisect good 24fdd5189914b36102cb51626a890a2d84501993 Bisecting: 1255 revisions left to test after this (roughly 10 steps) [809be620dc070c02a6e0daee0dcb0479c6296891] Merge tag 'usb-6.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb testing commit 809be620dc070c02a6e0daee0dcb0479c6296891 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 20188c677d2a42bc850d3e0a84b80dcf2bff56f63d341f1271cb733ae408eb24 all runs: OK false negative chance: 0.000 # git bisect good 809be620dc070c02a6e0daee0dcb0479c6296891 Bisecting: 659 revisions left to test after this (roughly 9 steps) [965c587a265e73e91ea5eda6f9b30ea59389cf65] Merge branch 'for-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/jgg/iommufd.git testing commit 965c587a265e73e91ea5eda6f9b30ea59389cf65 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c8b4a495b4fd2a1bf9b91013e171d7b53d6b74402569832f1f0af259d3c55663 all runs: OK false negative chance: 0.000 # git bisect good 965c587a265e73e91ea5eda6f9b30ea59389cf65 Bisecting: 329 revisions left to test after this (roughly 8 steps) [579a90ce2e8e1dee0fc3bcce9a29e8b5c3fcf2f7] Merge branch 'mm-nonmm-unstable' into mm-everything testing commit 579a90ce2e8e1dee0fc3bcce9a29e8b5c3fcf2f7 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6a51776989ab902bf2cf6ba35a49f021a924be92a8a3eb11743cab5e7f594cbd all runs: crashed: possible deadlock in lock_vma representative crash: possible deadlock in lock_vma, types: [LOCKDEP] # git bisect bad 579a90ce2e8e1dee0fc3bcce9a29e8b5c3fcf2f7 Bisecting: 164 revisions left to test after this (roughly 7 steps) [ff3d0c8a6c2b1969640c9e02bcf1a1dd6ad98421] selftests/mm: map_hugetlb: conform test to TAP format output testing commit ff3d0c8a6c2b1969640c9e02bcf1a1dd6ad98421 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 52462ef358e9fb0edac7d3c6ffd3b213303c9f4ad2a9133d3052f480d351aeec all runs: OK false negative chance: 0.000 # git bisect good ff3d0c8a6c2b1969640c9e02bcf1a1dd6ad98421 Bisecting: 82 revisions left to test after this (roughly 6 steps) [000dfeb500a3d0efb9472bb761f1613b7868e844] introduce cpu_dcache_is_aliasing() across all architectures testing commit 000dfeb500a3d0efb9472bb761f1613b7868e844 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 382ec159daa4d1e9198c03ce6e699fc021f217793255ab525753e24a82abc3c7 all runs: OK false negative chance: 0.000 # git bisect good 000dfeb500a3d0efb9472bb761f1613b7868e844 Bisecting: 41 revisions left to test after this (roughly 5 steps) [f26de17f4d6882af0fe20615ea147fc77849c185] Makefile: drop warn-stack-size plugin opt testing commit f26de17f4d6882af0fe20615ea147fc77849c185 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e32962a679c13e714ec16560c5cb254b2b5d95a36b9ed50b0f5d68f981e65abe all runs: OK false negative chance: 0.000 # git bisect good f26de17f4d6882af0fe20615ea147fc77849c185 Bisecting: 20 revisions left to test after this (roughly 4 steps) [380bbec23c9bb930442eafea2c958f71b3afe094] fat: Fix uninitialized field in nostale filehandles testing commit 380bbec23c9bb930442eafea2c958f71b3afe094 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4c71018ff1f3540d72c704e6cc5d1ae177ea8098883201445ff4716c840e22f0 all runs: OK false negative chance: 0.000 # git bisect good 380bbec23c9bb930442eafea2c958f71b3afe094 Bisecting: 10 revisions left to test after this (roughly 3 steps) [b28bad14adfed4eb922ff01f193f045102a6c74a] selftests/mm: log a consistent test name for check_compaction testing commit b28bad14adfed4eb922ff01f193f045102a6c74a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 014d1a1238ab1b90ee8db9e26d8100a62f0a53953134b71c3aec90b5d940055b all runs: crashed: possible deadlock in lock_vma representative crash: possible deadlock in lock_vma, types: [LOCKDEP] # git bisect bad b28bad14adfed4eb922ff01f193f045102a6c74a Bisecting: 4 revisions left to test after this (roughly 2 steps) [a9ef13a8fae49733cd1b8f311a3243814e125e03] virtio: cleanup alloc_dax() error handling testing commit a9ef13a8fae49733cd1b8f311a3243814e125e03 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b970934473c7d7b4a4b9c150f30c1b51461266cf943417855318fe4190fcfb12 all runs: OK false negative chance: 0.000 # git bisect good a9ef13a8fae49733cd1b8f311a3243814e125e03 Bisecting: 2 revisions left to test after this (roughly 1 step) [231c1aaf288bf7d92670c83a16696c15b1ebc581] userfaultfd: protect mmap_changing with rw_sem in userfaulfd_ctx testing commit 231c1aaf288bf7d92670c83a16696c15b1ebc581 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: eb5bd055c49c3b7e4b33006b63c6fc1b619dc548cf7d8ff6ebffbeaffe8ba938 all runs: OK false negative chance: 0.000 # git bisect good 231c1aaf288bf7d92670c83a16696c15b1ebc581 Bisecting: 0 revisions left to test after this (roughly 1 step) [9b57157e485cecba1929209388d6c7467b679533] selftests/mm: log skipped compaction test as a skip testing commit 9b57157e485cecba1929209388d6c7467b679533 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c424ea4ec6d5d0e2751045c25b031346338f74d7f8e4a9e41284c29782e55a23 all runs: crashed: possible deadlock in lock_vma representative crash: possible deadlock in lock_vma, types: [LOCKDEP] # git bisect bad 9b57157e485cecba1929209388d6c7467b679533 Bisecting: 0 revisions left to test after this (roughly 0 steps) [31d97016c80a83daa4c938014c81282810a14773] userfaultfd: use per-vma locks in userfaultfd operations testing commit 31d97016c80a83daa4c938014c81282810a14773 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2591c973dba60ed9eeb7656178bb105f48564f8f7d9fbb671e23a004892b7193 all runs: crashed: possible deadlock in lock_vma representative crash: possible deadlock in lock_vma, types: [LOCKDEP] # git bisect bad 31d97016c80a83daa4c938014c81282810a14773 31d97016c80a83daa4c938014c81282810a14773 is the first bad commit commit 31d97016c80a83daa4c938014c81282810a14773 Author: Lokesh Gidra Date: Thu Feb 8 13:22:04 2024 -0800 userfaultfd: use per-vma locks in userfaultfd operations All userfaultfd operations, except write-protect, opportunistically use per-vma locks to lock vmas. On failure, attempt again inside mmap_lock critical section. Write-protect operation requires mmap_lock as it iterates over multiple vmas. Link: https://lkml.kernel.org/r/20240208212204.2043140-4-lokeshgidra@google.com Signed-off-by: Lokesh Gidra Cc: Andrea Arcangeli Cc: Axel Rasmussen Cc: Brian Geffon Cc: David Hildenbrand Cc: Jann Horn Cc: Kalesh Singh Cc: Liam R. Howlett Cc: Matthew Wilcox (Oracle) Cc: Mike Rapoport (IBM) Cc: Nicolas Geoffray Cc: Peter Xu Cc: Suren Baghdasaryan Cc: Tim Murray Signed-off-by: Andrew Morton fs/userfaultfd.c | 13 +- include/linux/userfaultfd_k.h | 5 +- mm/userfaultfd.c | 356 ++++++++++++++++++++++++++++++++---------- 3 files changed, 275 insertions(+), 99 deletions(-) accumulated error probability: 0.00 culprit signature: 2591c973dba60ed9eeb7656178bb105f48564f8f7d9fbb671e23a004892b7193 parent signature: eb5bd055c49c3b7e4b33006b63c6fc1b619dc548cf7d8ff6ebffbeaffe8ba938 revisions tested: 23, total time: 9h24m33.452645721s (build: 5h11m30.710078509s, test: 3h53m30.513396698s) first bad commit: 31d97016c80a83daa4c938014c81282810a14773 userfaultfd: use per-vma locks in userfaultfd operations recipients (to): ["akpm@linux-foundation.org" "akpm@linux-foundation.org" "linux-mm@kvack.org" "lokeshgidra@google.com"] recipients (cc): ["axelrasmussen@google.com" "brauner@kernel.org" "linux-fsdevel@vger.kernel.org" "linux-kernel@vger.kernel.org" "mirq-linux@rere.qmqm.pl" "peterx@redhat.com" "rppt@kernel.org" "viro@zeniv.linux.org.uk"] crash: possible deadlock in lock_vma ====================================================== WARNING: possible circular locking dependency detected 6.8.0-rc3-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.0/2800 is trying to acquire lock: ffff88810df25920 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:146 [inline] ffff88810df25920 (&mm->mmap_lock){++++}-{3:3}, at: lock_vma+0x4a/0xf0 mm/userfaultfd.c:73 but task is already holding lock: ffff888112e3feb0 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma+0x7c/0xf0 mm/userfaultfd.c:87 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&vma->vm_lock->lock){++++}-{3:3}: down_write+0x29/0xb0 kernel/locking/rwsem.c:1579 vma_start_write include/linux/mm.h:716 [inline] vma_link+0xe4/0x190 mm/mmap.c:416 insert_vm_struct+0xdd/0x120 mm/mmap.c:3331 __bprm_mm_init fs/exec.c:282 [inline] bprm_mm_init fs/exec.c:384 [inline] alloc_bprm+0x2de/0x470 fs/exec.c:1580 kernel_execve+0x53/0x210 fs/exec.c:2009 try_to_run_init_process init/main.c:1366 [inline] kernel_init+0xcb/0x190 init/main.c:1500 ret_from_fork+0x32/0x40 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242 -> #0 (&mm->mmap_lock){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x11fd/0x2490 kernel/locking/lockdep.c:5137 lock_acquire+0xea/0x270 kernel/locking/lockdep.c:5754 down_read+0x4a/0x440 kernel/locking/rwsem.c:1526 mmap_read_lock include/linux/mmap_lock.h:146 [inline] lock_vma+0x4a/0xf0 mm/userfaultfd.c:73 find_and_lock_vmas mm/userfaultfd.c:1405 [inline] move_pages+0x78/0x2f0 mm/userfaultfd.c:1546 userfaultfd_move fs/userfaultfd.c:2008 [inline] userfaultfd_ioctl+0x38e/0x25d0 fs/userfaultfd.c:2126 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl+0x6e/0xc0 fs/ioctl.c:857 do_syscall_64+0xa7/0x1c0 entry_SYSCALL_64_after_hwframe+0x6f/0x77 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&vma->vm_lock->lock); lock(&mm->mmap_lock); lock(&vma->vm_lock->lock); rlock(&mm->mmap_lock); *** DEADLOCK *** 1 lock held by syz-executor.0/2800: #0: ffff888112e3feb0 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma+0x7c/0xf0 mm/userfaultfd.c:87 stack backtrace: CPU: 1 PID: 2800 Comm: syz-executor.0 Not tainted 6.8.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x8d/0xe0 lib/dump_stack.c:106 check_noncircular+0x119/0x140 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x11fd/0x2490 kernel/locking/lockdep.c:5137 lock_acquire+0xea/0x270 kernel/locking/lockdep.c:5754 down_read+0x4a/0x440 kernel/locking/rwsem.c:1526 mmap_read_lock include/linux/mmap_lock.h:146 [inline] lock_vma+0x4a/0xf0 mm/userfaultfd.c:73 find_and_lock_vmas mm/userfaultfd.c:1405 [inline] move_pages+0x78/0x2f0 mm/userfaultfd.c:1546 userfaultfd_move fs/userfaultfd.c:2008 [inline] userfaultfd_ioctl+0x38e/0x25d0 fs/userfaultfd.c:2126 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl+0x6e/0xc0 fs/ioctl.c:857 do_syscall_64+0xa7/0x1c0 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7ffa1a38ada9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffa19f0c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffa1a4b8f80 RCX: 00007ffa1a38ada9 RDX: 0000000020000040 RSI: 00000000c028aa05 RDI: 0000000000000003 RBP: 00007ffa1a3d747a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007ffa1a4b8f80 R15: 00007fff54dc4838