ci2 starts bisection 2024-09-13 23:08:31.062163157 +0000 UTC m=+31416.806883053 bisecting fixing commit since 7c6d66f0266faf94d04b3bfe0d7a06eae3484c50 building syzkaller on 46eb10b79c61c4032281212d862c913683ab32a0 ensuring issue is reproducible on original commit 7c6d66f0266faf94d04b3bfe0d7a06eae3484c50 testing commit 7c6d66f0266faf94d04b3bfe0d7a06eae3484c50 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 167c676adc994fa33bb65a41943977ce9a92fd4176fd1d5ae8f0dbae0a1af825 run #0: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #1: crashed: possible deadlock in __lock_task_sighand run #2: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #3: crashed: possible deadlock in __lock_task_sighand run #4: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #5: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #6: crashed: possible deadlock in __lock_task_sighand run #7: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #8: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #9: crashed: possible deadlock in __lock_task_sighand run #10: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #11: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #12: crashed: possible deadlock in __lock_task_sighand run #13: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #14: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #15: crashed: possible deadlock in __lock_task_sighand run #16: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #17: crashed: possible deadlock in __lock_task_sighand run #18: crashed: possible deadlock in __lock_task_sighand run #19: crashed: possible deadlock in __lock_task_sighand representative crash: possible deadlock in __mmap_lock_do_trace_acquire_returned, types: [LOCKDEP] check whether we can drop unnecessary instrumentation disabling configs for [BUG KASAN ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 7c6d66f0266faf94d04b3bfe0d7a06eae3484c50 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7347905652ef3ebec2d31cf96264c1b87e877c3c2436d739cec9c37c1e15d5cb run #0: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #1: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #2: crashed: possible deadlock in __lock_task_sighand run #3: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #4: crashed: possible deadlock in __lock_task_sighand run #5: crashed: possible deadlock in __lock_task_sighand run #6: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #7: crashed: possible deadlock in __lock_task_sighand run #8: crashed: possible deadlock in __lock_task_sighand run #9: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned representative crash: possible deadlock in __mmap_lock_do_trace_acquire_returned, 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=3706 full=7299 leaves diff=2036 split chunks (needed=false): <2036> split chunk #0 of len 2036 into 5 parts testing without sub-chunk 1/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit 7c6d66f0266faf94d04b3bfe0d7a06eae3484c50 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: bfdca87e4352839c6a508053cf6820bf30be3dcee163dfc031450a9e89ab11f1 run #0: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #1: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #2: crashed: possible deadlock in __lock_task_sighand run #3: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #4: crashed: possible deadlock in __lock_task_sighand run #5: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #6: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #7: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #8: crashed: possible deadlock in __lock_task_sighand run #9: crashed: possible deadlock in __lock_task_sighand representative crash: possible deadlock in __mmap_lock_do_trace_acquire_returned, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [KASAN ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit 7c6d66f0266faf94d04b3bfe0d7a06eae3484c50 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3ebbc98fa694e0fabbc7155a91c201461c0e7390625cf75b10251ca8d3ce7785 run #0: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #1: crashed: possible deadlock in __lock_task_sighand run #2: crashed: possible deadlock in __lock_task_sighand run #3: crashed: possible deadlock in __lock_task_sighand run #4: crashed: possible deadlock in __lock_task_sighand run #5: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #6: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #7: crashed: possible deadlock in __lock_task_sighand run #8: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #9: crashed: possible deadlock in __lock_task_sighand representative crash: possible deadlock in __mmap_lock_do_trace_acquire_returned, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit 7c6d66f0266faf94d04b3bfe0d7a06eae3484c50 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a70c2b8e57d463310edcd57987e31afeb014d47fbb4d0ba367c26d5f220caee2 run #0: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #1: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #2: crashed: possible deadlock in __lock_task_sighand run #3: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #4: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #5: crashed: possible deadlock in __lock_task_sighand run #6: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #7: crashed: possible deadlock in __lock_task_sighand run #8: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #9: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned representative crash: possible deadlock in __mmap_lock_do_trace_acquire_returned, 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 7c6d66f0266faf94d04b3bfe0d7a06eae3484c50 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b98fa2ad9a78919d8b954f584375c19046e52acd00baeebbd3b58bd3e8c01be2 all runs: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned representative crash: possible deadlock in __mmap_lock_do_trace_acquire_returned, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [UBSAN BUG KASAN ATOMIC_SLEEP HANG LEAK], they are not needed testing commit 7c6d66f0266faf94d04b3bfe0d7a06eae3484c50 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3aa12ba0a695bd0fe144f89b15c1295bf8c63b18c95ce522b759bbc48b0ab22b 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 CONTIG_ALLOC CRYPTO_842 CRYPTO_LZ4 CRYPTO_LZ4HC CRYPTO_LZO CRYPTO_ZSTD DVB_CORE EXTCON FB FRONTSWAP GPIOLIB HID_ZEROPLUS I2C_MUX IIO IRQ_REMAP LIBNVDIMM MEDIA_ANALOG_TV_SUPPORT MEDIA_CAMERA_SUPPORT MEDIA_CEC_SUPPORT MEDIA_CONTROLLER MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTPLUG_SPARSE MEMORY_HOTREMOVE MFD_VIPERBOARD 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_F_TCM USB_CONFIGFS_F_UAC1 USB_CONFIGFS_F_UAC1_LEGACY USB_CONFIGFS_F_UAC2 USB_CONFIGFS_F_UVC USB_CONFIGFS_MASS_STORAGE USB_CONFIGFS_NCM USB_CONFIGFS_OBEX USB_CONFIGFS_PHONET USB_CONFIGFS_RNDIS USB_CONFIGFS_SERIAL USB_CONN_GPIO USB_CXACRU USB_CYPRESS_CY7C63 USB_CYTHERM USB_DSBR USB_DUMMY_HCD USB_DWC2 USB_DWC2_HOST USB_DWC2_PCI USB_DWC3 USB_DWC3_GADGET USB_DWC3_HAPS USB_DWC3_OF_SIMPLE USB_DWC3_PCI USB_DWC3_ULPI USB_DYNAMIC_MINORS USB_EG20T USB_EHCI_FSL USB_EHCI_HCD_PLATFORM USB_EHCI_ROOT_HUB_TT USB_EHSET_TEST_FIXTURE USB_EMI26 USB_EMI62 USB_EPSON2888 USB_EZUSB_FX2 USB_FEW_INIT_RETRIES USB_FOTG210_HCD USB_FOTG210_UDC USB_FTDI_ELAN USB_F_ACM USB_F_ECM USB_F_EEM USB_F_FS USB_F_HID USB_F_MASS_STORAGE USB_F_MIDI USB_F_NCM USB_F_OBEX USB_F_PHONET USB_F_PRINTER USB_F_RNDIS USB_F_SERIAL USB_F_SS_LB USB_F_SUBSET USB_F_TCM USB_F_UAC1 USB_F_UAC1_LEGACY USB_F_UAC2 USB_F_UVC USB_GADGET USB_GADGETFS USB_GADGET_DEBUG_FILES USB_GADGET_DEBUG_FS USB_GL860 USB_GOKU USB_GPIO_VBUS USB_GR_UDC USB_GSPCA USB_GSPCA_BENQ USB_GSPCA_CONEX USB_GSPCA_CPIA1 USB_GSPCA_DTCS033 USB_GSPCA_ETOMS USB_GSPCA_FINEPIX USB_GSPCA_JEILINJ USB_GSPCA_JL2005BCD USB_GSPCA_KINECT USB_GSPCA_KONICA USB_GSPCA_MARS USB_GSPCA_MR97310A USB_GSPCA_NW80X USB_GSPCA_OV519 USB_GSPCA_OV534 USB_GSPCA_OV534_9 USB_GSPCA_PAC207 USB_GSPCA_PAC7302 USB_GSPCA_PAC7311 USB_GSPCA_SE401 USB_GSPCA_SN9C2028 USB_GSPCA_SN9C20X USB_GSPCA_SONIXB USB_GSPCA_SONIXJ USB_GSPCA_SPCA1528 USB_GSPCA_SPCA500 USB_GSPCA_SPCA501 USB_GSPCA_SPCA505 USB_GSPCA_SPCA506 USB_GSPCA_SPCA508 USB_GSPCA_SPCA561 USB_GSPCA_SQ905 USB_GSPCA_SQ905C USB_GSPCA_SQ930X USB_GSPCA_STK014 USB_GSPCA_STK1135 USB_GSPCA_STV0680 USB_GSPCA_SUNPLUS USB_GSPCA_T613 USB_GSPCA_TOPRO USB_GSPCA_TOUPTEK USB_GSPCA_TV8532 USB_GSPCA_VC032X USB_GSPCA_VICAM USB_GSPCA_XIRLINK_CIT USB_GSPCA_ZC3XX USB_HACKRF USB_HCD_BCMA USB_HCD_SSB USB_HSIC_USB3503 USB_HSIC_USB4604 USB_HSO USB_HUB_USB251XB USB_IDMOUSE USB_IOWARRIOR USB_IPHETH USB_ISIGHTFW USB_ISP116X_HCD USB_ISP1301 USB_ISP1760 USB_ISP1760_DUAL_ROLE USB_ISP1760_HCD USB_ISP1761_UDC USB_KAWETH USB_KC2190 USB_KEENE USB_LAN78XX USB_LCD USB_LD USB_LEDS_TRIGGER_USBPORT USB_LED_TRIG USB_LEGOTOWER USB_LGM_PHY USB_LIBCOMPOSITE USB_LINK_LAYER_TEST USB_M5602 USB_MA901 USB_MAX3420_UDC USB_MAX3421_HCD USB_MDC800 USB_MICROTEK USB_MR800 USB_MSI2500 USB_MUSB_DUAL_ROLE USB_MUSB_HDRC USB_MV_U3D USB_MV_UDC USB_NET2272 USB_NET2272_DMA USB_NET2280 USB_NET_AQC111 USB_NET_AX88179_178A USB_NET_AX8817X USB_NET_CDCETHER USB_NET_CDC_EEM USB_NET_CDC_MBIM USB_NET_CDC_NCM USB_NET_CDC_SUBSET USB_NET_CDC_SUBSET_ENABLE USB_NET_CH9200 USB_NET_CX82310_ETH USB_NET_DM9601 USB_NET_GL620A USB_NET_HUAWEI_CDC_NCM USB_NET_INT51X1 USB_NET_KALMIA USB_NET_MCS7830 USB_NET_NET1080 USB_NET_PLUSB USB_NET_QMI_WWAN USB_NET_RNDIS_HOST USB_NET_RNDIS_WLAN USB_NET_SMSC75XX USB_NET_SMSC95XX USB_NET_SR9700 USB_NET_SR9800 USB_NET_ZAURUS USB_OHCI_HCD_PLATFORM USB_OTG USB_OTG_FSM USB_OXU210HP_HCD USB_PEGASUS USB_PULSE8_CEC USB_PWC USB_PWC_INPUT_EVDEV USB_PXA27X USB_R8A66597 USB_R8A66597_HCD USB_RAINSHADOW_CEC USB_RAREMONO USB_RAW_GADGET USB_RTL8150 USB_RTL8152 USB_RTL8153_ECM USB_S2255 USB_SERIAL USB_SERIAL_AIRCABLE USB_SERIAL_ARK3116 USB_SERIAL_BELKIN USB_SERIAL_CH341 USB_SERIAL_CONSOLE USB_SERIAL_CP210X USB_SERIAL_CYBERJACK USB_SERIAL_CYPRESS_M8 USB_SERIAL_DEBUG USB_SERIAL_DIGI_ACCELEPORT USB_SERIAL_EDGEPORT USB_SERIAL_EDGEPORT_TI USB_SERIAL_EMPEG USB_SERIAL_F81232 USB_SERIAL_F8153X USB_SERIAL_FTDI_SIO USB_SERIAL_GARMIN USB_SERIAL_GENERIC USB_SERIAL_IPAQ USB_SERIAL_IPW USB_SERIAL_IR USB_SERIAL_IUU USB_SERIAL_KEYSPAN USB_SERIAL_KEYSPAN_PDA USB_SERIAL_KLSI USB_SERIAL_KOBIL_SCT USB_SERIAL_MCT_U232 USB_SERIAL_METRO USB_SERIAL_MOS7715_PARPORT USB_SERIAL_MOS7720 USB_SERIAL_MOS7840 USB_SERIAL_MXUPORT USB_SERIAL_NAVMAN USB_SERIAL_OMNINET USB_SERIAL_OPTICON USB_SERIAL_OPTION USB_SERIAL_OTI6858 USB_SERIAL_PL2303 USB_SERIAL_QCAUX USB_SERIAL_QT2 USB_SERIAL_QUALCOMM USB_SERIAL_SAFE USB_SERIAL_SIERRAWIRELESS USB_SERIAL_SIMPLE USB_SERIAL_SPCP8X5 USB_SERIAL_SSU100 USB_SERIAL_SYMBOL USB_SERIAL_TI USB_SERIAL_UPD78F0730 USB_SERIAL_VISOR USB_SERIAL_WHITEHEAT USB_SERIAL_WISHBONE USB_SERIAL_WWAN USB_SERIAL_XR USB_SERIAL_XSENS_MT USB_SEVSEG USB_SI470X USB_SI4713 USB_SIERRA_NET USB_SISUSBVGA USB_SL811_CS USB_SL811_HCD USB_SL811_HCD_ISO USB_SNP_CORE USB_SPEEDTOUCH USB_STKWEBCAM USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_ENE_UB6250 USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_STV06XX USB_TEST USB_TMC USB_TRANCEVIBRATOR USB_U132_HCD USB_UAS USB_UEAGLEATM USB_ULPI_BUS USB_USBNET USB_USS720 USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_VIDEO_CLASS USB_VIDEO_CLASS_INPUT_EVDEV USB_VL600 USB_WDM USB_XHCI_DBGCAP USB_XHCI_PCI_RENESAS USB_XHCI_PLATFORM USB_XUSBATM USB_YUREX USB_ZR364XX USERFAULTFD USERIO USERMODE_DRIVER USER_RETURN_NOTIFIER U_SERIAL_CONSOLE V4L2_MEM2MEM_DEV V4L_TEST_DRIVERS VALIDATE_FS_PARSER VDPA VETH VFIO VFIO_IOMMU_TYPE1 VFIO_PCI VFIO_PCI_CORE VFIO_PCI_INTX VFIO_PCI_MMAP VFIO_VIRQFD VGASTATE VHOST VHOST_CROSS_ENDIAN_LEGACY VHOST_IOTLB VHOST_NET VHOST_RING VHOST_VDPA VHOST_VSOCK VIDEOBUF2_CORE VIDEOBUF2_DMA_CONTIG VIDEOBUF2_DMA_SG VIDEOBUF2_MEMOPS VIDEOBUF2_V4L2 VIDEOBUF2_VMALLOC VIDEOBUF_GEN VIDEOBUF_VMALLOC VIDEO_AU0828 VIDEO_AU0828_RC VIDEO_AU0828_V4L2 VIDEO_CPIA2 VIDEO_CS53L32A VIDEO_CX231XX VIDEO_CX231XX_ALSA VIDEO_CX231XX_DVB VIDEO_CX231XX_RC VIDEO_CX2341X VIDEO_CX25840 VIDEO_DEV VIDEO_EM28XX VIDEO_EM28XX_ALSA VIDEO_EM28XX_DVB VIDEO_EM28XX_RC VIDEO_EM28XX_V4L2 VIDEO_GO7007 VIDEO_GO7007_LOADER VIDEO_GO7007_USB VIDEO_GO7007_USB_S2250_BOARD VIDEO_HDPVR VIDEO_MSP3400 VIDEO_PVRUSB2 VIDEO_PVRUSB2_DVB VIDEO_PVRUSB2_SYSFS VIDEO_SAA711X VIDEO_STK1160 VIDEO_STK1160_COMMON VIDEO_TM6000 VIDEO_TM6000_ALSA VIDEO_TM6000_DVB VIDEO_TUNER VIDEO_TVEEPROM VIDEO_USBTV VIDEO_V4L2 VIDEO_V4L2_I2C VIDEO_V4L2_SUBDEV_API VIDEO_V4L2_TPG VIDEO_VICODEC VIDEO_VIM2M VIDEO_VIMC VIDEO_VIVID VIDEO_VIVID_CEC VIDEO_WM8775 VIPERBOARD_ADC VIRTIO_BALLOON VIRTIO_DMA_SHARED_BUFFER VIRTIO_MEM VIRTIO_MMIO VIRTIO_MMIO_CMDLINE_DEVICES VIRTIO_PMEM VIRTIO_VDPA VIRTIO_VSOCKETS VIRTIO_VSOCKETS_COMMON VIRT_WIFI VLAN_8021Q VLAN_8021Q_GVRP VLAN_8021Q_MVRP VMAP_PFN VMWARE_VMCI VMXNET3 VP_VDPA VSOCKETS VSOCKETS_DIAG VSOCKETS_LOOPBACK VSOCKMON VT_HW_CONSOLE_BINDING VXFS_FS WANT_DEV_COREDUMP WEXT_CORE WEXT_PRIV WEXT_PROC WIREGUARD WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ADMTEK X86_SGX X86_X2APIC X86_X32 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_POSIX_ACL XFS_QUOTA XFS_RT XILLYBUS_CLASS XILLYUSB XOR_BLOCKS YENTA YENTA_ENE_TUNE YENTA_O2 YENTA_RICOH YENTA_TI YENTA_TOSHIBA ZBUD ZEROPLUS_FF ZONEFS_FS ZPOOL ZRAM ZRAM_DEF_COMP_LZORLE ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_LZO ZSWAP_DEFAULT_ON ZSWAP_ZPOOL_DEFAULT_ZBUD] disabling configs for [LEAK UBSAN BUG KASAN ATOMIC_SLEEP HANG], they are not needed testing current HEAD 3a5928702e7120f83f703fd566082bfb59f1a57e testing commit 3a5928702e7120f83f703fd566082bfb59f1a57e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: db6dbf31b94ca4660e210f68b28991060ec3d819e3ccbd9f1c0a445b71986423 all runs: OK false negative chance: 0.000 # git bisect start 3a5928702e7120f83f703fd566082bfb59f1a57e 7c6d66f0266faf94d04b3bfe0d7a06eae3484c50 Bisecting: 496 revisions left to test after this (roughly 9 steps) [c763dfe09425152b6bb0e348900a637c62c2ce52] drm/client: fix null pointer dereference in drm_client_modeset_probe determine whether the revision contains the guilty commit revision 7c6d66f0266faf94d04b3bfe0d7a06eae3484c50 crashed and is reachable testing commit c763dfe09425152b6bb0e348900a637c62c2ce52 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 0216e1db598280215c34f22945211f19df2bedb134dc1672c029db01c61ed826 all runs: OK false negative chance: 0.000 # git bisect bad c763dfe09425152b6bb0e348900a637c62c2ce52 Bisecting: 247 revisions left to test after this (roughly 8 steps) [f99a44c33fa43adebefcd0e9d61e10ffbd8723cc] rtc: interface: Add RTC offset to alarm after fix-up determine whether the revision contains the guilty commit revision 7c6d66f0266faf94d04b3bfe0d7a06eae3484c50 crashed and is reachable testing commit f99a44c33fa43adebefcd0e9d61e10ffbd8723cc gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1a756c24f26a75981c085117fbedbf5f33ec43a37def47db107bf8bac28a646a run #0: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #1: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #2: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #3: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #4: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #5: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #6: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #7: crashed: possible deadlock in __lock_task_sighand run #8: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned run #9: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned representative crash: possible deadlock in __mmap_lock_do_trace_acquire_returned, types: [LOCKDEP] # git bisect good f99a44c33fa43adebefcd0e9d61e10ffbd8723cc Bisecting: 123 revisions left to test after this (roughly 7 steps) [d76bec2f0d64253d77258af1734d364af9026964] ceph: fix incorrect kmalloc size of pagevec mempool determine whether the revision contains the guilty commit revision f99a44c33fa43adebefcd0e9d61e10ffbd8723cc crashed and is reachable testing commit d76bec2f0d64253d77258af1734d364af9026964 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c9c0383aebb11045bafa95346842c83ef2441cf5a042a0a2051972b78dbdb18b all runs: OK false negative chance: 0.000 # git bisect bad d76bec2f0d64253d77258af1734d364af9026964 Bisecting: 61 revisions left to test after this (roughly 6 steps) [bdfdd57a308afb449865a4c890cbdfe0b05ff37f] scsi: qla2xxx: Fix flash read failure determine whether the revision contains the guilty commit revision 7c6d66f0266faf94d04b3bfe0d7a06eae3484c50 crashed and is reachable testing commit bdfdd57a308afb449865a4c890cbdfe0b05ff37f gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b165bf21caf8a33b2d8c00adf08c9e0fde72048072642c607577388af97d9630 all runs: OK false negative chance: 0.000 # git bisect bad bdfdd57a308afb449865a4c890cbdfe0b05ff37f Bisecting: 30 revisions left to test after this (roughly 5 steps) [838fef8e44b05723b541c9c68601462476739b22] wifi: mwifiex: Fix interface type change determine whether the revision contains the guilty commit revision f99a44c33fa43adebefcd0e9d61e10ffbd8723cc crashed and is reachable testing commit 838fef8e44b05723b541c9c68601462476739b22 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 28a15007f32a5fe33545965138f7cb2f1279908eaf4d7b93d0b319c71c6a633c all runs: OK false negative chance: 0.000 # git bisect bad 838fef8e44b05723b541c9c68601462476739b22 Bisecting: 15 revisions left to test after this (roughly 4 steps) [d55aae5c1730d6b70d5d8eaff00113cd34772ea3] hfs: fix to initialize fields of hfs_inode_info after hfs_alloc_inode() determine whether the revision contains the guilty commit revision 7c6d66f0266faf94d04b3bfe0d7a06eae3484c50 crashed and is reachable testing commit d55aae5c1730d6b70d5d8eaff00113cd34772ea3 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f2358614fa587dba702aa8e139113c62a0e5cb5571b7b36d5b18c10fbb9a1411 all runs: OK false negative chance: 0.000 # git bisect bad d55aae5c1730d6b70d5d8eaff00113cd34772ea3 Bisecting: 7 revisions left to test after this (roughly 3 steps) [2f9576a9c2966c2f6ed75af7271d3f455b236bf5] net: netconsole: Disable target before netpoll cleanup determine whether the revision contains the guilty commit revision f99a44c33fa43adebefcd0e9d61e10ffbd8723cc crashed and is reachable testing commit 2f9576a9c2966c2f6ed75af7271d3f455b236bf5 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a5c77f9f55ab4923acac9bc4818492b81851849ee8a1fdc02c66bcb3b5870638 all runs: OK false negative chance: 0.000 # git bisect bad 2f9576a9c2966c2f6ed75af7271d3f455b236bf5 Bisecting: 3 revisions left to test after this (roughly 2 steps) [fa774151f9b74a6b5a85cff1c9f876ad1f0db62a] mm/hugetlb: fix possible recursive locking detected warning determine whether the revision contains the guilty commit revision 7c6d66f0266faf94d04b3bfe0d7a06eae3484c50 crashed and is reachable testing commit fa774151f9b74a6b5a85cff1c9f876ad1f0db62a gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9afe3867026034e1a42eaf35d87431eaf03596371c286673daffd2bc643c7530 all runs: crashed: possible deadlock in __mmap_lock_do_trace_acquire_returned representative crash: possible deadlock in __mmap_lock_do_trace_acquire_returned, types: [LOCKDEP] # git bisect good fa774151f9b74a6b5a85cff1c9f876ad1f0db62a Bisecting: 1 revision left to test after this (roughly 1 step) [8b6ad5840fab3804194d318801115d97a8e1d742] dt-bindings: thermal: correct thermal zone node name limit determine whether the revision contains the guilty commit revision 7c6d66f0266faf94d04b3bfe0d7a06eae3484c50 crashed and is reachable testing commit 8b6ad5840fab3804194d318801115d97a8e1d742 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8ccd17669ac9844a264278aa82ef77e1f6223cfde6e1e5b98bfcf98f502f3d40 all runs: OK false negative chance: 0.000 # git bisect bad 8b6ad5840fab3804194d318801115d97a8e1d742 Bisecting: 0 revisions left to test after this (roughly 0 steps) [d240b789dded28e4fb9f28b4265dbaf67050d870] mm: mmap_lock: replace get_memcg_path_buf() with on-stack buffer determine whether the revision contains the guilty commit revision fa774151f9b74a6b5a85cff1c9f876ad1f0db62a crashed and is reachable testing commit d240b789dded28e4fb9f28b4265dbaf67050d870 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8ccd17669ac9844a264278aa82ef77e1f6223cfde6e1e5b98bfcf98f502f3d40 all runs: OK false negative chance: 0.000 # git bisect bad d240b789dded28e4fb9f28b4265dbaf67050d870 d240b789dded28e4fb9f28b4265dbaf67050d870 is the first bad commit commit d240b789dded28e4fb9f28b4265dbaf67050d870 Author: Tetsuo Handa Date: Fri Jun 21 10:08:41 2024 +0900 mm: mmap_lock: replace get_memcg_path_buf() with on-stack buffer commit 7d6be67cfdd4a53cea7147313ca13c531e3a470f upstream. Commit 2b5067a8143e ("mm: mmap_lock: add tracepoints around lock acquisition") introduced TRACE_MMAP_LOCK_EVENT() macro using preempt_disable() in order to let get_mm_memcg_path() return a percpu buffer exclusively used by normal, softirq, irq and NMI contexts respectively. Commit 832b50725373 ("mm: mmap_lock: use local locks instead of disabling preemption") replaced preempt_disable() with local_lock(&memcg_paths.lock) based on an argument that preempt_disable() has to be avoided because get_mm_memcg_path() might sleep if PREEMPT_RT=y. But syzbot started reporting inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. and inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. messages, for local_lock() does not disable IRQ. We could replace local_lock() with local_lock_irqsave() in order to suppress these messages. But this patch instead replaces percpu buffers with on-stack buffer, for the size of each buffer returned by get_memcg_path_buf() is only 256 bytes which is tolerable for allocating from current thread's kernel stack memory. Link: https://lkml.kernel.org/r/ef22d289-eadb-4ed9-863b-fbc922b33d8d@I-love.SAKURA.ne.jp Reported-by: syzbot Closes: https://syzkaller.appspot.com/bug?extid=40905bca570ae6784745 Fixes: 832b50725373 ("mm: mmap_lock: use local locks instead of disabling preemption") Signed-off-by: Tetsuo Handa Reviewed-by: Axel Rasmussen Cc: Nicolas Saenz Julienne Cc: Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman mm/mmap_lock.c | 175 +++++++-------------------------------------------------- 1 file changed, 20 insertions(+), 155 deletions(-) accumulated error probability: 0.00 culprit signature: 8ccd17669ac9844a264278aa82ef77e1f6223cfde6e1e5b98bfcf98f502f3d40 parent signature: 9afe3867026034e1a42eaf35d87431eaf03596371c286673daffd2bc643c7530 revisions tested: 18, total time: 3h8m43.506296152s (build: 41m46.237316202s, test: 2h23m8.863212159s) first good commit: d240b789dded28e4fb9f28b4265dbaf67050d870 mm: mmap_lock: replace get_memcg_path_buf() with on-stack buffer recipients (to): ["akpm@linux-foundation.org" "axelrasmussen@google.com" "gregkh@linuxfoundation.org" "penguin-kernel@i-love.sakura.ne.jp"] recipients (cc): []