ci2 starts bisection 2024-05-14 23:13:48.349996531 +0000 UTC m=+84276.071144547 bisecting fixing commit since 347385861c50adc8d4801d4b899eded38a2f04cd building syzkaller on ca620dd8f97f5b3a9134b687b5584203019518fb ensuring issue is reproducible on original commit 347385861c50adc8d4801d4b899eded38a2f04cd testing commit 347385861c50adc8d4801d4b899eded38a2f04cd gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 22089c2aa9613934b8fa835c260fee4bd70d56d55f4312261c12ee88db5eed9e run #0: crashed: WARNING in validate_chain run #1: crashed: possible deadlock in scheduler_tick run #2: crashed: WARNING in validate_chain run #3: crashed: possible deadlock in swake_up_one run #4: crashed: possible deadlock in scheduler_tick run #5: crashed: WARNING in validate_chain run #6: crashed: possible deadlock in scheduler_tick run #7: crashed: WARNING in call_timer_fn run #8: crashed: possible deadlock in scheduler_tick run #9: crashed: possible deadlock in scheduler_tick run #10: crashed: WARNING in validate_chain run #11: crashed: possible deadlock in scheduler_tick run #12: crashed: possible deadlock in swake_up_one run #13: crashed: possible deadlock in scheduler_tick run #14: crashed: WARNING in sock_hash_delete_elem run #15: crashed: possible deadlock in scheduler_tick run #16: crashed: WARNING in sock_hash_delete_elem run #17: crashed: WARNING in call_timer_fn run #18: crashed: possible deadlock in scheduler_tick run #19: crashed: possible deadlock in rcu_report_exp_cpu_mult representative crash: possible deadlock in scheduler_tick, types: [LOCKDEP WARNING] check whether we can drop unnecessary instrumentation disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN KASAN], they are not needed testing commit 347385861c50adc8d4801d4b899eded38a2f04cd gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c96a0dcbe859aacc552a48073e46532f1e4ecec1abc41a631b9ee3721d16ae01 run #0: crashed: possible deadlock in scheduler_tick run #1: crashed: possible deadlock in rcu_report_exp_cpu_mult run #2: crashed: possible deadlock in scheduler_tick run #3: crashed: possible deadlock in swake_up_one run #4: crashed: possible deadlock in scheduler_tick run #5: crashed: WARNING in sta_info_insert_rcu run #6: crashed: possible deadlock in scheduler_tick run #7: crashed: possible deadlock in scheduler_tick run #8: crashed: no output from test machine run #9: crashed: no output from test machine representative crash: possible deadlock in scheduler_tick, types: [LOCKDEP UNKNOWN] the bug reproduces without the instrumentation disabling configs for [HANG LEAK UBSAN KASAN ATOMIC_SLEEP], they are not needed kconfig minimization: base=3820 full=7454 leaves diff=1989 split chunks (needed=false): <1989> split chunk #0 of len 1989 into 5 parts testing without sub-chunk 1/5 disabling configs for [HANG LEAK UBSAN KASAN ATOMIC_SLEEP], they are not needed testing commit 347385861c50adc8d4801d4b899eded38a2f04cd gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b9e6167e300a3f6879053f180ebfe80d299d472c75db527fc09bdc8ea49af9f6 run #0: crashed: possible deadlock in scheduler_tick run #1: crashed: possible deadlock in rcu_report_exp_cpu_mult run #2: crashed: possible deadlock in scheduler_tick run #3: crashed: possible deadlock in scheduler_tick run #4: crashed: WARNING in sock_hash_delete_elem run #5: crashed: WARNING in call_rcu run #6: crashed: possible deadlock in scheduler_tick run #7: crashed: possible deadlock in console_emit_next_record run #8: crashed: WARNING in sock_hash_delete_elem run #9: crashed: possible deadlock in rcu_report_exp_cpu_mult representative crash: possible deadlock in scheduler_tick, types: [LOCKDEP WARNING] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [KASAN ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 347385861c50adc8d4801d4b899eded38a2f04cd gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2d279ecc8c993a6e61a66bf787bbc16773eb56281b76ab3bd6725833f25fc542 run #0: crashed: WARNING in sock_hash_delete_elem run #1: crashed: possible deadlock in rcu_report_exp_cpu_mult run #2: crashed: possible deadlock in scheduler_tick run #3: crashed: possible deadlock in scheduler_tick run #4: crashed: possible deadlock in scheduler_tick run #5: crashed: WARNING in synchronize_rcu_expedited run #6: crashed: possible deadlock in scheduler_tick run #7: crashed: WARNING in sock_hash_delete_elem run #8: crashed: WARNING in sock_hash_delete_elem run #9: crashed: possible deadlock in add_timer_on representative crash: possible deadlock in rcu_report_exp_cpu_mult, types: [LOCKDEP WARNING] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [HANG LEAK UBSAN KASAN ATOMIC_SLEEP], they are not needed testing commit 347385861c50adc8d4801d4b899eded38a2f04cd gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: edc71e2b01c4eef99b2b4234a2e930240bb474f9b5d0ddd5be4ae18b1c644f7b run #0: crashed: possible deadlock in scheduler_tick run #1: crashed: possible deadlock in scheduler_tick run #2: crashed: possible deadlock in hrtimer_run_queues run #3: crashed: possible deadlock in scheduler_tick run #4: crashed: WARNING in call_rcu run #5: crashed: possible deadlock in scheduler_tick run #6: crashed: possible deadlock in rcu_report_exp_cpu_mult run #7: crashed: possible deadlock in swake_up_one run #8: crashed: WARNING in sock_hash_delete_elem run #9: crashed: possible deadlock in scheduler_tick representative crash: possible deadlock in scheduler_tick, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [UBSAN KASAN ATOMIC_SLEEP HANG LEAK], they are not needed testing commit 347385861c50adc8d4801d4b899eded38a2f04cd gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: db3cd9c5cfea528b47595e394bd1cbc4f07018a45ef58dae7f4b2e03085b1447 run #0: crashed: WARNING in sock_hash_delete_elem run #1: crashed: possible deadlock in scheduler_tick run #2: crashed: possible deadlock in scheduler_tick run #3: crashed: possible deadlock in scheduler_tick run #4: crashed: WARNING in call_rcu run #5: crashed: possible deadlock in rcu_report_exp_cpu_mult run #6: crashed: possible deadlock in scheduler_tick run #7: crashed: WARNING in call_rcu run #8: crashed: WARNING in call_rcu run #9: crashed: WARNING in sock_hash_delete_elem representative crash: WARNING in sock_hash_delete_elem, types: [WARNING LOCKDEP] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN KASAN], they are not needed testing commit 347385861c50adc8d4801d4b899eded38a2f04cd gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8bc793bd620ba02950b1706df3c7b3ab8d1babb129c3ea9a555d66bf781053b2 all runs: OK false negative chance: 0.000 minimized to 397 configs; suspects: [ARCH_ENABLE_MEMORY_HOTREMOVE ATM BCMA BLK_DEV_ZONED BPF_SYSCALL CARDBUS CFG80211 CFG80211_WEXT CMA COMMON_CLK CONTIG_ALLOC CRYPTO_842 CRYPTO_LZ4 CRYPTO_LZ4HC CRYPTO_LZO CRYPTO_ZSTD DVB_CORE EXTCON FB GPIOLIB HID_ZEROPLUS I2C_MUX IIO IRQ_REMAP KVM KVM_INTEL LIBNVDIMM MEDIA_ANALOG_TV_SUPPORT MEDIA_CAMERA_SUPPORT MEDIA_CEC_SUPPORT MEDIA_CONTROLLER MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_VIPERBOARD 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_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_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_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_RNDIS_WLAN USB_NET_SMSC75XX USB_NET_SMSC95XX USB_NET_SR9700 USB_NET_SR9800 USB_NET_ZAURUS USB_OHCI_HCD_PLATFORM USB_OTG USB_OTG_FSM USB_OXU210HP_HCD USB_PEGASUS USB_PULSE8_CEC USB_PWC USB_PWC_INPUT_EVDEV USB_PXA27X USB_R8A66597 USB_R8A66597_HCD USB_RAINSHADOW_CEC USB_RAREMONO USB_RAW_GADGET USB_RTL8150 USB_RTL8152 USB_RTL8153_ECM USB_S2255 USB_SERIAL USB_SERIAL_AIRCABLE USB_SERIAL_ARK3116 USB_SERIAL_BELKIN USB_SERIAL_CH341 USB_SERIAL_CONSOLE USB_SERIAL_CP210X USB_SERIAL_CYBERJACK USB_SERIAL_CYPRESS_M8 USB_SERIAL_DEBUG USB_SERIAL_DIGI_ACCELEPORT USB_SERIAL_EDGEPORT USB_SERIAL_EDGEPORT_TI USB_SERIAL_EMPEG USB_SERIAL_F81232 USB_SERIAL_F8153X USB_SERIAL_FTDI_SIO USB_SERIAL_GARMIN USB_SERIAL_GENERIC USB_SERIAL_IPAQ USB_SERIAL_IPW USB_SERIAL_IR USB_SERIAL_IUU USB_SERIAL_KEYSPAN USB_SERIAL_KEYSPAN_PDA USB_SERIAL_KLSI USB_SERIAL_KOBIL_SCT USB_SERIAL_MCT_U232 USB_SERIAL_METRO USB_SERIAL_MOS7715_PARPORT USB_SERIAL_MOS7720 USB_SERIAL_MOS7840 USB_SERIAL_MXUPORT USB_SERIAL_NAVMAN USB_SERIAL_OMNINET USB_SERIAL_OPTICON USB_SERIAL_OPTION USB_SERIAL_OTI6858 USB_SERIAL_PL2303 USB_SERIAL_QCAUX USB_SERIAL_QT2 USB_SERIAL_QUALCOMM USB_SERIAL_SAFE USB_SERIAL_SIERRAWIRELESS USB_SERIAL_SIMPLE USB_SERIAL_SPCP8X5 USB_SERIAL_SSU100 USB_SERIAL_SYMBOL USB_SERIAL_TI USB_SERIAL_UPD78F0730 USB_SERIAL_VISOR USB_SERIAL_WHITEHEAT USB_SERIAL_WISHBONE USB_SERIAL_WWAN USB_SERIAL_XR USB_SERIAL_XSENS_MT USB_SEVSEG USB_SI470X USB_SI4713 USB_SIERRA_NET USB_SISUSBVGA USB_SL811_CS USB_SL811_HCD USB_SL811_HCD_ISO USB_SNP_CORE USB_SPEEDTOUCH USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_ENE_UB6250 USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_STV06XX USB_TEST USB_TMC USB_TRANCEVIBRATOR USB_U132_HCD USB_UAS USB_UEAGLEATM USB_ULPI_BUS USB_USBNET USB_USS720 USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_VIDEO_CLASS USB_VIDEO_CLASS_INPUT_EVDEV USB_VL600 USB_WDM USB_XHCI_DBGCAP USB_XHCI_PLATFORM USB_XUSBATM USB_YUREX USERFAULTFD USERIO USERMODE_DRIVER USER_RETURN_NOTIFIER U_SERIAL_CONSOLE V4L2_MEM2MEM_DEV V4L_TEST_DRIVERS VALIDATE_FS_PARSER VDPA VDPA_SIM VDPA_SIM_BLOCK VDPA_SIM_NET VDPA_USER VETH VFIO VFIO_IOMMU_TYPE1 VFIO_PCI VFIO_PCI_CORE VFIO_PCI_INTX VFIO_PCI_MMAP VFIO_VIRQFD VGASTATE VHOST VHOST_CROSS_ENDIAN_LEGACY VHOST_IOTLB VHOST_NET VHOST_RING VHOST_VDPA VHOST_VSOCK VIDEOBUF2_CORE VIDEOBUF2_DMA_CONTIG VIDEOBUF2_DMA_SG VIDEOBUF2_MEMOPS VIDEOBUF2_V4L2 VIDEOBUF2_VMALLOC VIDEOMODE_HELPERS VIDEO_AU0828 VIDEO_AU0828_RC VIDEO_AU0828_V4L2 VIDEO_CS53L32A VIDEO_CX231XX VIDEO_CX231XX_ALSA VIDEO_CX231XX_DVB VIDEO_CX231XX_RC VIDEO_CX2341X VIDEO_CX25840 VIDEO_DEV VIDEO_EM28XX VIDEO_EM28XX_ALSA VIDEO_EM28XX_DVB VIDEO_EM28XX_RC VIDEO_EM28XX_V4L2 VIDEO_GO7007 VIDEO_GO7007_LOADER VIDEO_GO7007_USB VIDEO_GO7007_USB_S2250_BOARD VIDEO_HDPVR VIDEO_MSP3400 VIDEO_PVRUSB2 VIDEO_PVRUSB2_DVB VIDEO_PVRUSB2_SYSFS VIDEO_SAA711X VIDEO_STK1160 VIDEO_STK1160_COMMON VIDEO_TUNER VIDEO_TVEEPROM VIDEO_USBTV VIDEO_V4L2_I2C VIDEO_V4L2_SUBDEV_API VIDEO_V4L2_TPG VIDEO_VICODEC VIDEO_VIM2M VIDEO_VIMC VIDEO_VIVID VIDEO_VIVID_CEC VIDEO_WM8775 VIPERBOARD_ADC VIRTIO_BALLOON VIRTIO_DMA_SHARED_BUFFER VIRTIO_MEM VIRTIO_MMIO VIRTIO_MMIO_CMDLINE_DEVICES VIRTIO_PMEM VIRTIO_VDPA VIRTIO_VSOCKETS VIRTIO_VSOCKETS_COMMON VIRT_WIFI VLAN_8021Q VLAN_8021Q_GVRP VLAN_8021Q_MVRP VMAP_PFN VMWARE_VMCI VMXNET3 VP_VDPA VSOCKETS VSOCKETS_DIAG VSOCKETS_LOOPBACK VSOCKMON VT_HW_CONSOLE_BINDING VXFS_FS WANT_DEV_COREDUMP WEXT_CORE WEXT_PRIV WEXT_PROC WIREGUARD WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ADMTEK WLAN_VENDOR_PURELIFI WLAN_VENDOR_SILABS X86_SGX X86_SGX_KVM X86_X2APIC X86_X32_ABI 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 XOR_BLOCKS YENTA YENTA_ENE_TUNE YENTA_O2 YENTA_RICOH YENTA_TI YENTA_TOSHIBA ZBUD ZEROPLUS_FF ZLIB_DEFLATE ZONEFS_FS ZPOOL ZRAM ZRAM_DEF_COMP_LZORLE ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_LZO ZSWAP_DEFAULT_ON ZSWAP_ZPOOL_DEFAULT_ZBUD] disabling configs for [KASAN ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing current HEAD 909ba1f1b4146de529469910c1bd0b1248964536 testing commit 909ba1f1b4146de529469910c1bd0b1248964536 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a98261f289b676c3c6b8cfc2b575a30ac676bdd9390021ebd8f82439e4689e39 all runs: OK false negative chance: 0.000 # git bisect start 909ba1f1b4146de529469910c1bd0b1248964536 347385861c50adc8d4801d4b899eded38a2f04cd Bisecting: 271 revisions left to test after this (roughly 8 steps) [18c8cc6680ce938d0458859b6a08b4d34f7d8055] drm/client: Fully protect modes[] with dev->mode_config.mutex determine whether the revision contains the guilty commit revision 347385861c50adc8d4801d4b899eded38a2f04cd crashed and is reachable testing commit 18c8cc6680ce938d0458859b6a08b4d34f7d8055 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 030cb5e129c3f9ba21bcd0e42a728d7fad423c944dd324b348eb71bbabadef29 all runs: OK false negative chance: 0.000 # git bisect bad 18c8cc6680ce938d0458859b6a08b4d34f7d8055 Bisecting: 135 revisions left to test after this (roughly 7 steps) [bb8384b6dfbc49be230071d1e844a8741982b1ec] x86/bhi: Add BHI mitigation knob determine whether the revision contains the guilty commit revision 347385861c50adc8d4801d4b899eded38a2f04cd crashed and is reachable testing commit bb8384b6dfbc49be230071d1e844a8741982b1ec gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 04392828d7416c20d6d0ec5bd6e6ebdbfe2ce0a8e87c6cd57c54cb2d8f5b31a1 all runs: OK false negative chance: 0.000 # git bisect bad bb8384b6dfbc49be230071d1e844a8741982b1ec Bisecting: 67 revisions left to test after this (roughly 6 steps) [fe74ea5b8b78d96b9ba313f070b18833a4e32b32] i40e: fix i40e_count_filters() to count only active/new filters determine whether the revision contains the guilty commit revision 347385861c50adc8d4801d4b899eded38a2f04cd crashed and is reachable testing commit fe74ea5b8b78d96b9ba313f070b18833a4e32b32 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b1e0b53d41bffdb1f0834160ba54b56fb1862c8bfe0a8d9120e31e77c0519deb all runs: OK false negative chance: 0.000 # git bisect bad fe74ea5b8b78d96b9ba313f070b18833a4e32b32 Bisecting: 33 revisions left to test after this (roughly 5 steps) [38e3eaa861bde62b92e207b07a9dc595a784191f] Bluetooth: hci_event: set the conn encrypted before conn establishes determine whether the revision contains the guilty commit revision 347385861c50adc8d4801d4b899eded38a2f04cd crashed and is reachable testing commit 38e3eaa861bde62b92e207b07a9dc595a784191f gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 729c3ce5c3d42e002864049097baf7a5685df2bb4f569d056c9f10dacfece260 run #0: crashed: possible deadlock in swake_up_one run #1: crashed: possible deadlock in scheduler_tick run #2: crashed: WARNING in call_rcu run #3: crashed: possible deadlock in rcu_report_exp_cpu_mult run #4: crashed: possible deadlock in scheduler_tick run #5: crashed: possible deadlock in scheduler_tick run #6: crashed: possible deadlock in scheduler_tick run #7: crashed: possible deadlock in scheduler_tick run #8: crashed: possible deadlock in swake_up_one run #9: crashed: possible deadlock in scheduler_tick representative crash: possible deadlock in swake_up_one, types: [LOCKDEP] # git bisect good 38e3eaa861bde62b92e207b07a9dc595a784191f Bisecting: 16 revisions left to test after this (roughly 4 steps) [10608161696c2768f53426642f78a42bcaaa53e8] net: phy: micrel: Fix potential null pointer dereference determine whether the revision contains the guilty commit revision 38e3eaa861bde62b92e207b07a9dc595a784191f crashed and is reachable testing commit 10608161696c2768f53426642f78a42bcaaa53e8 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2ea5e4646f63381b22ca17cda4d7cf781e961671deb99b0f6720c6d09494f56b all runs: OK false negative chance: 0.000 # git bisect bad 10608161696c2768f53426642f78a42bcaaa53e8 Bisecting: 8 revisions left to test after this (roughly 3 steps) [4e8447a9a3d367b5065a0b7abe101da6e0037b6e] netfilter: nf_tables: flush pending destroy work before exit_net release determine whether the revision contains the guilty commit revision 347385861c50adc8d4801d4b899eded38a2f04cd crashed and is reachable testing commit 4e8447a9a3d367b5065a0b7abe101da6e0037b6e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fddb6769e1eaea185c96460dbf6a53a477f277eb151e6cc75c05634739d284ca run #0: crashed: possible deadlock in scheduler_tick run #1: crashed: WARNING in bpf_link_settle run #2: crashed: BUG: using __this_cpu_add() in preemptible code in graph_lock run #3: crashed: possible deadlock in scheduler_tick run #4: crashed: possible deadlock in scheduler_tick run #5: crashed: possible deadlock in scheduler_tick run #6: crashed: possible deadlock in scheduler_tick run #7: crashed: possible deadlock in scheduler_tick run #8: crashed: possible deadlock in scheduler_tick run #9: crashed: possible deadlock in scheduler_tick representative crash: possible deadlock in scheduler_tick, types: [LOCKDEP] # git bisect good 4e8447a9a3d367b5065a0b7abe101da6e0037b6e Bisecting: 4 revisions left to test after this (roughly 2 steps) [a44770fed86515eedb5a7c00b787f847ebb134a5] bpf, sockmap: Prevent lock inversion deadlock in map delete elem determine whether the revision contains the guilty commit revision 38e3eaa861bde62b92e207b07a9dc595a784191f crashed and is reachable testing commit a44770fed86515eedb5a7c00b787f847ebb134a5 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7a78a31c86ee7108118239fef163dd0e1e198c509f4419d99a538486d8738307 all runs: OK false negative chance: 0.000 # git bisect bad a44770fed86515eedb5a7c00b787f847ebb134a5 Bisecting: 1 revision left to test after this (roughly 1 step) [18aae2cb87e5faa9c5bd865260ceadac60d5a6c5] netfilter: validate user input for expected length determine whether the revision contains the guilty commit revision 38e3eaa861bde62b92e207b07a9dc595a784191f crashed and is reachable testing commit 18aae2cb87e5faa9c5bd865260ceadac60d5a6c5 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 92376ba2ffcc8941af84409d756f2c016cd36e0d63f08b848bbc096daad49841 run #0: crashed: possible deadlock in swake_up_one run #1: crashed: possible deadlock in scheduler_tick run #2: crashed: possible deadlock in scheduler_tick run #3: crashed: possible deadlock in scheduler_tick run #4: crashed: possible deadlock in scheduler_tick run #5: crashed: possible deadlock in rcu_report_exp_cpu_mult run #6: crashed: possible deadlock in scheduler_tick run #7: crashed: WARNING in sock_hash_delete_elem run #8: crashed: possible deadlock in rcu_report_exp_cpu_mult run #9: crashed: no output from test machine representative crash: possible deadlock in swake_up_one, types: [LOCKDEP] # git bisect good 18aae2cb87e5faa9c5bd865260ceadac60d5a6c5 Bisecting: 0 revisions left to test after this (roughly 0 steps) [8a57544e9285a16dce8e58f470a1b30f426812c4] vboxsf: Avoid an spurious warning if load_nls_xxx() fails determine whether the revision contains the guilty commit revision 18aae2cb87e5faa9c5bd865260ceadac60d5a6c5 crashed and is reachable testing commit 8a57544e9285a16dce8e58f470a1b30f426812c4 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 12874670ba5c83698fc1b1905b7e26855388f2969e313eac677febebf0ef676c run #0: crashed: possible deadlock in scheduler_tick run #1: crashed: possible deadlock in scheduler_tick run #2: crashed: possible deadlock in scheduler_tick run #3: crashed: possible deadlock in scheduler_tick run #4: crashed: WARNING in call_rcu run #5: crashed: WARNING in call_rcu run #6: crashed: possible deadlock in scheduler_tick run #7: crashed: WARNING in sock_hash_delete_elem run #8: crashed: possible deadlock in scheduler_tick run #9: crashed: possible deadlock in scheduler_tick representative crash: possible deadlock in scheduler_tick, types: [LOCKDEP WARNING] # git bisect good 8a57544e9285a16dce8e58f470a1b30f426812c4 a44770fed86515eedb5a7c00b787f847ebb134a5 is the first bad commit commit a44770fed86515eedb5a7c00b787f847ebb134a5 Author: Jakub Sitnicki Date: Tue Apr 2 12:46:21 2024 +0200 bpf, sockmap: Prevent lock inversion deadlock in map delete elem commit ff91059932401894e6c86341915615c5eb0eca48 upstream. syzkaller started using corpuses where a BPF tracing program deletes elements from a sockmap/sockhash map. Because BPF tracing programs can be invoked from any interrupt context, locks taken during a map_delete_elem operation must be hardirq-safe. Otherwise a deadlock due to lock inversion is possible, as reported by lockdep: CPU0 CPU1 ---- ---- lock(&htab->buckets[i].lock); local_irq_disable(); lock(&host->lock); lock(&htab->buckets[i].lock); lock(&host->lock); Locks in sockmap are hardirq-unsafe by design. We expects elements to be deleted from sockmap/sockhash only in task (normal) context with interrupts enabled, or in softirq context. Detect when map_delete_elem operation is invoked from a context which is _not_ hardirq-unsafe, that is interrupts are disabled, and bail out with an error. Note that map updates are not affected by this issue. BPF verifier does not allow updating sockmap/sockhash from a BPF tracing program today. Fixes: 604326b41a6f ("bpf, sockmap: convert to generic sk_msg interface") Reported-by: xingwei lee Reported-by: yue sun Reported-by: syzbot+bc922f476bd65abbd466@syzkaller.appspotmail.com Reported-by: syzbot+d4066896495db380182e@syzkaller.appspotmail.com Signed-off-by: Jakub Sitnicki Signed-off-by: Daniel Borkmann Tested-by: syzbot+d4066896495db380182e@syzkaller.appspotmail.com Acked-by: John Fastabend Closes: https://syzkaller.appspot.com/bug?extid=d4066896495db380182e Closes: https://syzkaller.appspot.com/bug?extid=bc922f476bd65abbd466 Link: https://lore.kernel.org/bpf/20240402104621.1050319-1-jakub@cloudflare.com Signed-off-by: Greg Kroah-Hartman net/core/sock_map.c | 6 ++++++ 1 file changed, 6 insertions(+) accumulated error probability: 0.00 culprit signature: 7a78a31c86ee7108118239fef163dd0e1e198c509f4419d99a538486d8738307 parent signature: 12874670ba5c83698fc1b1905b7e26855388f2969e313eac677febebf0ef676c revisions tested: 17, total time: 3h2m7.732237774s (build: 48m6.993861932s, test: 2h9m4.958702032s) first good commit: a44770fed86515eedb5a7c00b787f847ebb134a5 bpf, sockmap: Prevent lock inversion deadlock in map delete elem recipients (to): ["daniel@iogearbox.net" "gregkh@linuxfoundation.org" "jakub@cloudflare.com" "john.fastabend@gmail.com" "syzbot+d4066896495db380182e@syzkaller.appspotmail.com"] recipients (cc): []