ci2 starts bisection 2023-11-22 14:51:38.401880085 +0000 UTC m=+104.783541560 bisecting fixing commit since d54cfc420586425d418a53871290cc4a59d33501 building syzkaller on 022df2bb9a105c303cf24c910b8e787cf642a3f3 ensuring issue is reproducible on original commit d54cfc420586425d418a53871290cc4a59d33501 testing commit d54cfc420586425d418a53871290cc4a59d33501 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c54bfd2b2aff0f8efbaf8a7872162f0e40742671e80c66b73138375d223bd579 all runs: crashed: WARNING in untrack_pfn representative crash: WARNING in untrack_pfn, types: [WARNING] check whether we can drop unnecessary instrumentation disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit d54cfc420586425d418a53871290cc4a59d33501 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7d5eff98d5a2861138ef559a74e335cab42a88b0ff44cbef5a270423d507f1e8 all runs: crashed: WARNING in untrack_pfn representative crash: WARNING in untrack_pfn, types: [WARNING] the bug reproduces without the instrumentation disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN KASAN], they are not needed kconfig minimization: base=3703 full=7267 leaves diff=1985 split chunks (needed=false): <1985> split chunk #0 of len 1985 into 5 parts testing without sub-chunk 1/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN KASAN], they are not needed testing commit d54cfc420586425d418a53871290cc4a59d33501 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 776debaeed089b7e83105910dd154a6370692f64a1dcc34ff7876ee5a59fd3ce all runs: crashed: WARNING in untrack_pfn representative crash: WARNING in untrack_pfn, types: [WARNING] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit d54cfc420586425d418a53871290cc4a59d33501 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c3b6402b3ca4e4e7ab37ece0748580f02ec31f9e1cc6f7f5615d80a039183b9d all runs: crashed: WARNING in untrack_pfn representative crash: WARNING in untrack_pfn, types: [WARNING] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit d54cfc420586425d418a53871290cc4a59d33501 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1831cd5a943cb68e3fc45e77417f6c375e36aa948ceba5721964b2b6ba3861b0 all runs: crashed: WARNING in untrack_pfn representative crash: WARNING in untrack_pfn, types: [WARNING] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit d54cfc420586425d418a53871290cc4a59d33501 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: dd488cf683275a28a3e0b84ee3a0341c44583278a1d3d615431bb734d3aa711a all runs: crashed: WARNING in untrack_pfn representative crash: WARNING in untrack_pfn, types: [WARNING] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit d54cfc420586425d418a53871290cc4a59d33501 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b7ac66dc633aa6d04c2441efe219eafcc67118f41ee376296457b03f94798840 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 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_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_FOTG210_HCD USB_FOTG210_UDC 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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_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 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 [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN KASAN], they are not needed determining the merge base between d54cfc420586425d418a53871290cc4a59d33501 and c2d5304e6c648ebcf653bace7e51e0e6742e46c8 8bb7eca972ad531c9b149c0a51ab43a417385813/Linux 5.15 is a merge base, check if it has the bug testing commit 8bb7eca972ad531c9b149c0a51ab43a417385813 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: db319b4416a9d0b6e4c7da4e8aaa55d7d438e0647a6807643a384d975c866c47 run #0: infra problem: failed to create instance: googleapi: Error 503: Authentication backend unavailable., backendError run #1: crashed: WARNING in untrack_pfn run #2: crashed: WARNING in untrack_pfn run #3: crashed: WARNING in untrack_pfn run #4: crashed: WARNING in untrack_pfn run #5: crashed: WARNING in untrack_pfn run #6: crashed: WARNING in untrack_pfn run #7: crashed: WARNING in untrack_pfn run #8: crashed: WARNING in untrack_pfn run #9: crashed: WARNING in untrack_pfn representative crash: WARNING in untrack_pfn, types: [WARNING] testing current HEAD c2d5304e6c648ebcf653bace7e51e0e6742e46c8 testing commit c2d5304e6c648ebcf653bace7e51e0e6742e46c8 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 202b53dc7e331736bae206be6d162c2a4524e48bb20383028d6a8c14cedb3b4e all runs: OK false negative chance: 0.000 # git bisect start c2d5304e6c648ebcf653bace7e51e0e6742e46c8 8bb7eca972ad531c9b149c0a51ab43a417385813 Bisecting: 94524 revisions left to test after this (roughly 17 steps) [f513a19a603a76965f3eeb88a45c4442dac035c1] Merge tag 'amd-drm-next-6.2-2022-11-25' of https://gitlab.freedesktop.org/agd5f/linux into drm-next determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit f513a19a603a76965f3eeb88a45c4442dac035c1 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 failed building f513a19a603a76965f3eeb88a45c4442dac035c1: ./include/linux/fb.h:812: multiple definition of `fb_modesetting_disabled'; drivers/video/aperture.o:./include/linux/fb.h:812: first defined here # git bisect skip f513a19a603a76965f3eeb88a45c4442dac035c1 Bisecting: 94457 revisions left to test after this (roughly 17 steps) [637a6a1bec9b68c1c48cbd45d72bf287d1e9f638] drm/bridge: tc358768: Convert to i2c's .probe_new() determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 637a6a1bec9b68c1c48cbd45d72bf287d1e9f638 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d9838f8b9c45768e2df7366929f2a85b7d4befa2b2b60bd2ffb1520e08cb512a all runs: crashed: WARNING in untrack_pfn representative crash: WARNING in untrack_pfn, types: [WARNING] # git bisect good 637a6a1bec9b68c1c48cbd45d72bf287d1e9f638 Bisecting: 47228 revisions left to test after this (roughly 16 steps) [6f48bc9e49f9ff343badeee9b87b258826c9bdc6] media: atomisp: Remove a bunch of unused atomisp_css_*() functions determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 6f48bc9e49f9ff343badeee9b87b258826c9bdc6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7af25cd5d5df0f9aed77ba2e191e5e2ac6e01d75329414422d44cca7e6f1176f all runs: OK false negative chance: 0.000 # git bisect bad 6f48bc9e49f9ff343badeee9b87b258826c9bdc6 Bisecting: 24082 revisions left to test after this (roughly 15 steps) [307e14c039063f0c9bd7a18a7add8f940580dcc9] Merge tag '6.3-rc-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6 determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 307e14c039063f0c9bd7a18a7add8f940580dcc9 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7b2d897810c211d09a2ba69cc8224c5dcf008cc19daac6bc3870950c941803d2 all runs: crashed: WARNING in untrack_pfn representative crash: WARNING in untrack_pfn, types: [WARNING] # git bisect good 307e14c039063f0c9bd7a18a7add8f940580dcc9 Bisecting: 11985 revisions left to test after this (roughly 14 steps) [c8cc58e289ed3b5bc50258f52776cf3dfa3bad66] Merge tag 'drm-next-2023-04-24' of git://anongit.freedesktop.org/drm/drm determine whether the revision contains the guilty commit revision 637a6a1bec9b68c1c48cbd45d72bf287d1e9f638 crashed and is reachable testing commit c8cc58e289ed3b5bc50258f52776cf3dfa3bad66 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6f9afc3292091b8b047da970708fc0e7bf7638d2fb1c9923042c21d95f3194a7 all runs: crashed: WARNING in untrack_pfn representative crash: WARNING in untrack_pfn, types: [WARNING] # git bisect good c8cc58e289ed3b5bc50258f52776cf3dfa3bad66 Bisecting: 5960 revisions left to test after this (roughly 13 steps) [b39667abcdcc754e32a0eb0df9cf49d45333d4ae] Merge tag 'tty-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty determine whether the revision contains the guilty commit revision 307e14c039063f0c9bd7a18a7add8f940580dcc9 crashed and is reachable testing commit b39667abcdcc754e32a0eb0df9cf49d45333d4ae gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 225a66cb668aef80bfa2ede5ae93f68a39e8a670aa4e74c6f1ca91ecb0d264be all runs: crashed: WARNING in untrack_pfn representative crash: WARNING in untrack_pfn, types: [WARNING] # git bisect good b39667abcdcc754e32a0eb0df9cf49d45333d4ae Bisecting: 2952 revisions left to test after this (roughly 12 steps) [c8c655c34e33544aec9d64b660872ab33c29b5f1] Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit c8c655c34e33544aec9d64b660872ab33c29b5f1 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6590c7ea48121488e5cba4185fff41cf5bb038ffdae653d01eaf62dae60943a7 all runs: OK false negative chance: 0.000 # git bisect bad c8c655c34e33544aec9d64b660872ab33c29b5f1 Bisecting: 1579 revisions left to test after this (roughly 11 steps) [5ea8abf589f2974d65460a1ffa0c303763e958da] Merge tag 'trace-tools-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace determine whether the revision contains the guilty commit revision c8cc58e289ed3b5bc50258f52776cf3dfa3bad66 crashed and is reachable testing commit 5ea8abf589f2974d65460a1ffa0c303763e958da gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 68bdaa51b08933c60f2b032e438480797bbfccaff9a6010e5f130b49599442bd all runs: OK false negative chance: 0.000 # git bisect bad 5ea8abf589f2974d65460a1ffa0c303763e958da Bisecting: 703 revisions left to test after this (roughly 10 steps) [8ccd54fe45713cd458015b5b08d6098545e70543] Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost determine whether the revision contains the guilty commit revision 307e14c039063f0c9bd7a18a7add8f940580dcc9 crashed and is reachable testing commit 8ccd54fe45713cd458015b5b08d6098545e70543 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 18eb1c4370f6451f09a3b8e57cc34b1179f3592f3eb16f310393152a99bb501c all runs: crashed: WARNING in untrack_pfn representative crash: WARNING in untrack_pfn, types: [WARNING] # git bisect good 8ccd54fe45713cd458015b5b08d6098545e70543 Bisecting: 351 revisions left to test after this (roughly 9 steps) [8e2e17560bed73c2a73c94cbe378719f6cf850ee] fs/buffer: add folio_create_empty_buffers helper determine whether the revision contains the guilty commit revision 307e14c039063f0c9bd7a18a7add8f940580dcc9 crashed and is reachable testing commit 8e2e17560bed73c2a73c94cbe378719f6cf850ee gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: bf2235e2ce9b629811b690c17887d7cd2395e40065025d79c92cb481734c2254 all runs: OK false negative chance: 0.000 # git bisect bad 8e2e17560bed73c2a73c94cbe378719f6cf850ee Bisecting: 175 revisions left to test after this (roughly 8 steps) [d6ac235de4ba6dc659eebb5f4e5ba0a8523d8424] mm/mremap: write-lock VMA while remapping it to a new address range determine whether the revision contains the guilty commit revision 307e14c039063f0c9bd7a18a7add8f940580dcc9 crashed and is reachable testing commit d6ac235de4ba6dc659eebb5f4e5ba0a8523d8424 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3c021df0b9b55900795225b2a88c347dfede2ecc080e41abb7203b66f644c443 all runs: OK false negative chance: 0.000 # git bisect bad d6ac235de4ba6dc659eebb5f4e5ba0a8523d8424 Bisecting: 87 revisions left to test after this (roughly 7 steps) [097b3e59b25e61481d93c6da5472319c0b7249e8] mm: use filemap_get_entry in filemap_get_incore_folio determine whether the revision contains the guilty commit revision f513a19a603a76965f3eeb88a45c4442dac035c1 crashed and is reachable testing commit 097b3e59b25e61481d93c6da5472319c0b7249e8 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: eaa9e070792c8de2aa35359ab1ff68114887b9e622c4c9677f3edef021ce1d16 all runs: OK false negative chance: 0.000 # git bisect bad 097b3e59b25e61481d93c6da5472319c0b7249e8 Bisecting: 43 revisions left to test after this (roughly 6 steps) [eaf7b66b76f85ce340c50b76e482c6f91593b8b0] mm, memcg: Prevent memory.oom.group load/store tearing determine whether the revision contains the guilty commit revision 307e14c039063f0c9bd7a18a7add8f940580dcc9 crashed and is reachable testing commit eaf7b66b76f85ce340c50b76e482c6f91593b8b0 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 170f974e698805dbeae06d98d5dc4deb2a36b7adae16c58e7244689b5cdd6731 all runs: OK false negative chance: 0.000 # git bisect bad eaf7b66b76f85ce340c50b76e482c6f91593b8b0 Bisecting: 21 revisions left to test after this (roughly 5 steps) [16d91faf09be148d9c1cf4999f4d15fb24a7cd72] kasan: call clear_page with a match-all tag instead of changing page tag determine whether the revision contains the guilty commit revision f513a19a603a76965f3eeb88a45c4442dac035c1 crashed and is reachable testing commit 16d91faf09be148d9c1cf4999f4d15fb24a7cd72 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f320fc5f6d84aefca0126a186ab3c77994db36dd86cae59eee35c7f3337bddc4 all runs: OK false negative chance: 0.000 # git bisect bad 16d91faf09be148d9c1cf4999f4d15fb24a7cd72 Bisecting: 10 revisions left to test after this (roughly 4 steps) [6cad87b0d216c6acdc40c5531c7b62db33fef5b1] kthread: simplify kthread_use_mm refcounting determine whether the revision contains the guilty commit revision f513a19a603a76965f3eeb88a45c4442dac035c1 crashed and is reachable testing commit 6cad87b0d216c6acdc40c5531c7b62db33fef5b1 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 676a5ae1fb570e0fda28ce71631eb221c911a94b0cdd708a690bd8554579b4c0 all runs: OK false negative chance: 0.000 # git bisect bad 6cad87b0d216c6acdc40c5531c7b62db33fef5b1 Bisecting: 5 revisions left to test after this (roughly 3 steps) [700d2e9a36b93601270c1e15550acde2521386c5] mm, page_alloc: reduce page alloc/free sanity checks determine whether the revision contains the guilty commit revision f513a19a603a76965f3eeb88a45c4442dac035c1 crashed and is reachable testing commit 700d2e9a36b93601270c1e15550acde2521386c5 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1eae211bcfacf70551df5e04e0932a4a8bc41e9650b9e13f2f816ebb66f683f6 all runs: crashed: WARNING in untrack_pfn representative crash: WARNING in untrack_pfn, types: [WARNING] # git bisect good 700d2e9a36b93601270c1e15550acde2521386c5 Bisecting: 2 revisions left to test after this (roughly 2 steps) [9a52b2f32a0942047348b30f866b846da5fcf4e3] mm: multi-gen LRU: clean up sysfs code determine whether the revision contains the guilty commit revision 637a6a1bec9b68c1c48cbd45d72bf287d1e9f638 crashed and is reachable testing commit 9a52b2f32a0942047348b30f866b846da5fcf4e3 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a9491e3bbf9bc88b144751834c4f523d4790b9e820cfe16a65cffdae66d68dc3 all runs: OK false negative chance: 0.000 # git bisect bad 9a52b2f32a0942047348b30f866b846da5fcf4e3 Bisecting: 1 revision left to test after this (roughly 1 step) [a1b92a3f14984c96ace381f204b5d72c0805296e] mm/userfaultfd: support WP on multiple VMAs determine whether the revision contains the guilty commit revision 700d2e9a36b93601270c1e15550acde2521386c5 crashed and is reachable testing commit a1b92a3f14984c96ace381f204b5d72c0805296e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2b7edf9b126473f4962dac2fdf24b2a9f211cdf7badf09b49c6f3aed66d58fef all runs: crashed: WARNING in untrack_pfn representative crash: WARNING in untrack_pfn, types: [WARNING] # git bisect good a1b92a3f14984c96ace381f204b5d72c0805296e Bisecting: 0 revisions left to test after this (roughly 0 steps) [d155df53f31068c3340733d586eb9b3ddfd70fc5] x86/mm/pat: clear VM_PAT if copy_p4d_range failed determine whether the revision contains the guilty commit revision f513a19a603a76965f3eeb88a45c4442dac035c1 crashed and is reachable testing commit d155df53f31068c3340733d586eb9b3ddfd70fc5 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 46a7f8c07ecd32b07172977dd6b44caec5282cfc9fdead96e5f9c579a4e82ca6 all runs: OK false negative chance: 0.000 # git bisect bad d155df53f31068c3340733d586eb9b3ddfd70fc5 d155df53f31068c3340733d586eb9b3ddfd70fc5 is the first bad commit commit d155df53f31068c3340733d586eb9b3ddfd70fc5 Author: Ma Wupeng Date: Fri Feb 17 10:56:15 2023 +0800 x86/mm/pat: clear VM_PAT if copy_p4d_range failed Syzbot reports a warning in untrack_pfn(). Digging into the root we found that this is due to memory allocation failure in pmd_alloc_one. And this failure is produced due to failslab. In copy_page_range(), memory alloaction for pmd failed. During the error handling process in copy_page_range(), mmput() is called to remove all vmas. While untrack_pfn this empty pfn, warning happens. Here's a simplified flow: dup_mm dup_mmap copy_page_range copy_p4d_range copy_pud_range copy_pmd_range pmd_alloc __pmd_alloc pmd_alloc_one page = alloc_pages(gfp, 0); if (!page) return NULL; mmput exit_mmap unmap_vmas unmap_single_vma untrack_pfn follow_phys WARN_ON_ONCE(1); Since this vma is not generate successfully, we can clear flag VM_PAT. In this case, untrack_pfn() will not be called while cleaning this vma. Function untrack_pfn_moved() has also been renamed to fit the new logic. Link: https://lkml.kernel.org/r/20230217025615.1595558-1-mawupeng1@huawei.com Signed-off-by: Ma Wupeng Reported-by: Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Dave Hansen Cc: Peter Zijlstra Cc: Suresh Siddha Cc: Toshi Kani Signed-off-by: Andrew Morton arch/x86/mm/pat/memtype.c | 12 ++++++++---- include/linux/pgtable.h | 7 ++++--- mm/memory.c | 1 + mm/mremap.c | 2 +- 4 files changed, 14 insertions(+), 8 deletions(-) accumulated error probability: 0.00 culprit signature: 46a7f8c07ecd32b07172977dd6b44caec5282cfc9fdead96e5f9c579a4e82ca6 parent signature: 2b7edf9b126473f4962dac2fdf24b2a9f211cdf7badf09b49c6f3aed66d58fef revisions tested: 27, total time: 5h33m50.541842046s (build: 1h43m17.700918514s, test: 3h18m6.514315655s) first good commit: d155df53f31068c3340733d586eb9b3ddfd70fc5 x86/mm/pat: clear VM_PAT if copy_p4d_range failed recipients (to): ["akpm@linux-foundation.org" "mawupeng1@huawei.com"] recipients (cc): []