ci starts bisection 2023-08-27 09:23:49.53038085 +0000 UTC m=+173345.236493998 bisecting cause commit starting from 6269320850097903b30be8f07a5c61d9f7592393 building syzkaller on 03d9c195daed8fca30b642783f35657aa7e32209 ensuring issue is reproducible on original commit 6269320850097903b30be8f07a5c61d9f7592393 testing commit 6269320850097903b30be8f07a5c61d9f7592393 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7549a1a414d2de8e5dc02f40a3af4b29ffbc095e9142e843bd9ba3cdcbb54f8c all runs: crashed: KASAN: slab-use-after-free Read in pwq_release_workfn representative crash: KASAN: slab-use-after-free Read in pwq_release_workfn, types: [KASAN] check whether we can drop unnecessary instrumentation disabling configs for [BUG LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 6269320850097903b30be8f07a5c61d9f7592393 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a65a05eeefacadbe5adae71350f82cdee4ea44680f6d5165d12cfb982bed6955 all runs: crashed: KASAN: slab-use-after-free Read in pwq_release_workfn representative crash: KASAN: slab-use-after-free Read in pwq_release_workfn, types: [KASAN] the bug reproduces without the instrumentation disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed kconfig minimization: base=3883 full=7693 leaves diff=2019 split chunks (needed=false): <2019> split chunk #0 of len 2019 into 5 parts testing without sub-chunk 1/5 disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 6269320850097903b30be8f07a5c61d9f7592393 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1ef98ce876c063ccb4ee13a326707c358d340eb8d55e5c4b5a9298ebd51e481e all runs: crashed: KASAN: slab-use-after-free Read in pwq_release_workfn representative crash: KASAN: slab-use-after-free Read in pwq_release_workfn, types: [KASAN] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit 6269320850097903b30be8f07a5c61d9f7592393 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e1ff301bf1a79242156086e9b42eb6cae4490d07a15b28d2b7b6e2aee10a2029 all runs: crashed: KASAN: slab-use-after-free Read in pwq_release_workfn representative crash: KASAN: slab-use-after-free Read in pwq_release_workfn, types: [KASAN] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit 6269320850097903b30be8f07a5c61d9f7592393 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 99d065e4c5ab987cf0d013acb44d4ea7b7819b4d12d755ca493840a1e6da25ef all runs: crashed: KASAN: slab-use-after-free Read in pwq_release_workfn representative crash: KASAN: slab-use-after-free Read in pwq_release_workfn, types: [KASAN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 6269320850097903b30be8f07a5c61d9f7592393 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 610129a402007f3bead2878cc67c86a9caa1f1808ad17c939f15d32aa43ba97e all runs: crashed: KASAN: slab-use-after-free Read in pwq_release_workfn representative crash: KASAN: slab-use-after-free Read in pwq_release_workfn, types: [KASAN] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit 6269320850097903b30be8f07a5c61d9f7592393 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a8fa95efb6f6d7391f375544169d5c6cc62def7da842a30567f2b5ac4465c905 all runs: OK false negative chance: 0.000 minimized to 403 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_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_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_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_ASYNC V4L2_FWNODE V4L2_MEM2MEM_DEV V4L_TEST_DRIVERS VALIDATE_FS_PARSER VDPA VDPA_SIM VDPA_SIM_BLOCK VDPA_SIM_NET VDPA_USER VETH VFIO VFIO_GROUP 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 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_CAMERA_SENSOR VIDEO_CMDLINE 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_NOMODESET 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_SGX X86_SGX_KVM X86_USER_SHADOW_STACK 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 [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed picked [%!d(string=v6.4) %!d(string=v6.3) %!d(string=v6.2) %!d(string=v6.0) %!d(string=v5.18) %!d(string=v5.16) %!d(string=v5.14) %!d(string=v5.12) %!d(string=v5.9) %!d(string=v5.6) %!d(string=v5.3) %!d(string=v5.0) %!d(string=v4.19)] out of %!d(MISSING) release tags testing release v6.4 testing commit 6995e2de6891c724bfeb2db33d7b87775f913ad1 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 97e23982510d9cf831fda22c698e6ddbcd797b31600b616a1a239a3dae5754dd all runs: OK false negative chance: 0.000 # git bisect start 6269320850097903b30be8f07a5c61d9f7592393 6995e2de6891c724bfeb2db33d7b87775f913ad1 Bisecting: 13708 revisions left to test after this (roughly 14 steps) [43fbd506498aefb696e4e338a517883fbd8b39ce] Merge tag 'iio-for-6.6a' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into char-misc-next testing commit 43fbd506498aefb696e4e338a517883fbd8b39ce gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5e5f346b0a23d2a8d8495c4a19d26940289badb9acd9af936472fcffc586b029 all runs: OK false negative chance: 0.000 # git bisect good 43fbd506498aefb696e4e338a517883fbd8b39ce Bisecting: 6305 revisions left to test after this (roughly 13 steps) [0c8f01b0c3c16b0a0983030ed3282974fc17e972] Merge branch 'main' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git testing commit 0c8f01b0c3c16b0a0983030ed3282974fc17e972 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fcd2f08f8a8fc2a52ddf85f954a0a3b577085d9f579a6c7d071ff908ea924b69 all runs: OK false negative chance: 0.000 # git bisect good 0c8f01b0c3c16b0a0983030ed3282974fc17e972 Bisecting: 3176 revisions left to test after this (roughly 12 steps) [08f633fb57b32b05bc5bde5472443004c92cb39e] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply.git testing commit 08f633fb57b32b05bc5bde5472443004c92cb39e gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 0cf238b360520428e7fccdc57f0e4532e80a13de1696fa40e82ac3a694c48ada all runs: OK false negative chance: 0.000 # git bisect good 08f633fb57b32b05bc5bde5472443004c92cb39e Bisecting: 1613 revisions left to test after this (roughly 11 steps) [29e2338674187230c23110f4a5ea7308c6c71e30] Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial.git testing commit 29e2338674187230c23110f4a5ea7308c6c71e30 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a2e6e55e1d0e118885ea7c1ec4c85444ca1949d5db7587d48cb88a474388e028 all runs: crashed: KASAN: slab-use-after-free Read in pwq_release_workfn representative crash: KASAN: slab-use-after-free Read in pwq_release_workfn, types: [KASAN] # git bisect bad 29e2338674187230c23110f4a5ea7308c6c71e30 Bisecting: 790 revisions left to test after this (roughly 10 steps) [07a281ad1e11ca1026678bbad27a236d759898f0] Merge branch 'irq/irqchip-next' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git testing commit 07a281ad1e11ca1026678bbad27a236d759898f0 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6200fbf81d8ac410c5b74fa14d93ab2d1b3ab2bdf58a0f69cdbef6165b7d3bc0 all runs: OK false negative chance: 0.000 # git bisect good 07a281ad1e11ca1026678bbad27a236d759898f0 Bisecting: 381 revisions left to test after this (roughly 9 steps) [637d033f469b7988999b13bf007f4474b6a0af89] Merge branch 'next' of https://github.com/kvm-x86/linux.git testing commit 637d033f469b7988999b13bf007f4474b6a0af89 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2a125313ddfa18d407f72e2638feb644c7a1297b65b4105f18fb19fc886be85d all runs: OK false negative chance: 0.000 # git bisect good 637d033f469b7988999b13bf007f4474b6a0af89 Bisecting: 190 revisions left to test after this (roughly 8 steps) [47b2db8af4a79a6711fa639856055d659952cae0] Merge branch 'for-next' of git://github.com/cminyard/linux-ipmi.git testing commit 47b2db8af4a79a6711fa639856055d659952cae0 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 16231d2c7d9e64125cb11473cad72bc98d37c13a28a331e8767aae35998038c7 all runs: crashed: KASAN: slab-use-after-free Read in pwq_release_workfn representative crash: KASAN: slab-use-after-free Read in pwq_release_workfn, types: [KASAN] # git bisect bad 47b2db8af4a79a6711fa639856055d659952cae0 Bisecting: 114 revisions left to test after this (roughly 7 steps) [65c6ea33e7f63799090158866cdcfdfe8d63ce16] Merge remote-tracking branch 'pdx86/platform-drivers-x86-simatic-ipc' into review-hans testing commit 65c6ea33e7f63799090158866cdcfdfe8d63ce16 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a5c8e1d74ac84014e69d4c06d9ac41003d1d8d14d78dba472579ed56f044b495 all runs: OK false negative chance: 0.000 # git bisect good 65c6ea33e7f63799090158866cdcfdfe8d63ce16 Bisecting: 55 revisions left to test after this (roughly 6 steps) [a6728f420558b8c21dd349505ecb3b2d77a5a3f2] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux.git testing commit a6728f420558b8c21dd349505ecb3b2d77a5a3f2 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7598a810f21a5b3a0ff0ec7943700a433f8fbe1bded16c205166c29923646306 all runs: crashed: KASAN: slab-use-after-free Read in pwq_release_workfn representative crash: KASAN: slab-use-after-free Read in pwq_release_workfn, types: [KASAN] # git bisect bad a6728f420558b8c21dd349505ecb3b2d77a5a3f2 Bisecting: 29 revisions left to test after this (roughly 5 steps) [7dbf15c5c05e835d488e0fee49a35b0f23452e45] workqueue: Add "Affinity Scopes and Performance" section to documentation testing commit 7dbf15c5c05e835d488e0fee49a35b0f23452e45 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 255316a097afc71da5cdcb30a536202fc367048a166f50505fea0ecefd0f64a5 all runs: OK false negative chance: 0.000 # git bisect good 7dbf15c5c05e835d488e0fee49a35b0f23452e45 Bisecting: 13 revisions left to test after this (roughly 4 steps) [818d45f8a71f0260c9b9e24e66b445809d1a231f] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu.git testing commit 818d45f8a71f0260c9b9e24e66b445809d1a231f gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 98c23c539f329ce1402534be5492cadacf7ac396c6ca06482c497086d37b8516 all runs: OK false negative chance: 0.000 # git bisect good 818d45f8a71f0260c9b9e24e66b445809d1a231f Bisecting: 6 revisions left to test after this (roughly 3 steps) [c076af902bdf17e1f0fa095dac47e81a28288ed5] Merge branch 'for-6.6' into for-next testing commit c076af902bdf17e1f0fa095dac47e81a28288ed5 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5c5d58c7e6401c31cb7b9f579aeb57ba709c17c8c9971e6098fd5b2d5d3da24e all runs: OK false negative chance: 0.000 # git bisect good c076af902bdf17e1f0fa095dac47e81a28288ed5 Bisecting: 3 revisions left to test after this (roughly 2 steps) [703e77134ebf7d99acbd0f85f7c94cfb408f4bd0] platform/chrome: chromeos_acpi: support official HID GOOG0016 testing commit 703e77134ebf7d99acbd0f85f7c94cfb408f4bd0 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 395716b457c05500348f030f79770299fbe3a0c7578b320a23d4343e72f45aeb all runs: OK false negative chance: 0.000 # git bisect good 703e77134ebf7d99acbd0f85f7c94cfb408f4bd0 Bisecting: 1 revision left to test after this (roughly 1 step) [2262beadf7f0e15629a67b85a85362b731803d55] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git testing commit 2262beadf7f0e15629a67b85a85362b731803d55 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8c5bcdec4ce7a99779953c9284fc7d75770641898f736488f8fc47f14f8919fa all runs: crashed: KASAN: slab-use-after-free Read in pwq_release_workfn representative crash: KASAN: slab-use-after-free Read in pwq_release_workfn, types: [KASAN] # git bisect bad 2262beadf7f0e15629a67b85a85362b731803d55 Bisecting: 0 revisions left to test after this (roughly 0 steps) [9040900ee31fb409992e7d5924f0d9bfa01bb00e] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git testing commit 9040900ee31fb409992e7d5924f0d9bfa01bb00e gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2e73d8e9220be359880978f3de38e85557e0e22c7fb8869f033463d6152b855c all runs: crashed: KASAN: slab-use-after-free Read in pwq_release_workfn representative crash: KASAN: slab-use-after-free Read in pwq_release_workfn, types: [KASAN] # git bisect bad 9040900ee31fb409992e7d5924f0d9bfa01bb00e 9040900ee31fb409992e7d5924f0d9bfa01bb00e is the first bad commit commit 9040900ee31fb409992e7d5924f0d9bfa01bb00e Merge: 818d45f8a71f c076af902bdf Author: Stephen Rothwell Date: Fri Aug 25 12:38:59 2023 +1000 Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git Documentation/admin-guide/kernel-parameters.txt | 28 +- Documentation/core-api/workqueue.rst | 356 ++++- include/linux/workqueue.h | 115 +- init/main.c | 1 + kernel/workqueue.c | 1616 +++++++++++++---------- kernel/workqueue_internal.h | 2 +- tools/workqueue/wq_dump.py | 177 +++ tools/workqueue/wq_monitor.py | 21 +- 8 files changed, 1512 insertions(+), 804 deletions(-) create mode 100644 tools/workqueue/wq_dump.py accumulated error probability: 0.00 revisions tested: 23, total time: 10h0m13.830424752s (build: 6h28m51.244839226s, test: 3h10m14.658657298s) first bad commit: 9040900ee31fb409992e7d5924f0d9bfa01bb00e Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git recipients (to): ["sfr@canb.auug.org.au"] recipients (cc): [] crash: KASAN: slab-use-after-free Read in pwq_release_workfn ================================================================== BUG: KASAN: slab-use-after-free in pwq_release_workfn+0x2ce/0x330 kernel/workqueue.c:4124 Read of size 4 at addr ffff88811c01f9c0 by task pool_workqueue_/3 CPU: 1 PID: 3 Comm: pool_workqueue_ Not tainted 6.5.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x3d/0x60 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xc4/0x620 mm/kasan/report.c:475 kasan_report+0xda/0x110 mm/kasan/report.c:588 pwq_release_workfn+0x2ce/0x330 kernel/workqueue.c:4124 kthread_worker_fn+0x21a/0x6e0 kernel/kthread.c:823 kthread+0x278/0x330 kernel/kthread.c:388 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Allocated by task 2825: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383 kmalloc include/linux/slab.h:582 [inline] kzalloc include/linux/slab.h:703 [inline] alloc_workqueue+0x11a/0x1100 kernel/workqueue.c:4684 kvm_mmu_init_tdp_mmu+0x1e/0xf0 arch/x86/kvm/mmu/tdp_mmu.c:19 kvm_mmu_init_vm+0x226/0x2b0 arch/x86/kvm/mmu/mmu.c:6180 kvm_arch_init_vm+0x1f/0x6b0 arch/x86/kvm/x86.c:12311 kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:1222 [inline] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:5089 [inline] kvm_dev_ioctl+0x96f/0x17a0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:5131 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __x64_sys_ioctl+0x12b/0x1a0 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 2825: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1792 [inline] slab_free_freelist_hook+0x10b/0x1e0 mm/slub.c:1818 slab_free mm/slub.c:3801 [inline] __kmem_cache_free+0xba/0x330 mm/slub.c:3814 alloc_workqueue+0xafa/0x1100 kernel/workqueue.c:4746 kvm_mmu_init_tdp_mmu+0x1e/0xf0 arch/x86/kvm/mmu/tdp_mmu.c:19 kvm_mmu_init_vm+0x226/0x2b0 arch/x86/kvm/mmu/mmu.c:6180 kvm_arch_init_vm+0x1f/0x6b0 arch/x86/kvm/x86.c:12311 kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:1222 [inline] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:5089 [inline] kvm_dev_ioctl+0x96f/0x17a0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:5131 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __x64_sys_ioctl+0x12b/0x1a0 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88811c01f800 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 448 bytes inside of freed 512-byte region [ffff88811c01f800, ffff88811c01fa00) The buggy address belongs to the physical page: page:ffffea0004700700 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11c01c head:ffffea0004700700 order:2 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0x200000000000840(slab|head|node=0|zone=2) page_type: 0xffffffff() raw: 0200000000000840 ffff888100041c80 0000000000000000 dead000000000001 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1949, tgid 1949 (udevadm), ts 6306230964, free_ts 0 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x27e/0x2f0 mm/page_alloc.c:1530 prep_new_page mm/page_alloc.c:1537 [inline] get_page_from_freelist+0xca9/0x2f50 mm/page_alloc.c:3200 __alloc_pages+0x1d0/0x470 mm/page_alloc.c:4456 alloc_slab_page mm/slub.c:1862 [inline] allocate_slab+0x24b/0x360 mm/slub.c:2009 new_slab mm/slub.c:2062 [inline] ___slab_alloc+0x7a9/0x1000 mm/slub.c:3215 __slab_alloc.constprop.0+0x4d/0x90 mm/slub.c:3314 __slab_alloc_node mm/slub.c:3367 [inline] slab_alloc_node mm/slub.c:3460 [inline] __kmem_cache_alloc_node+0x143/0x390 mm/slub.c:3509 kmalloc_trace+0x25/0xb0 mm/slab_common.c:1075 kmalloc include/linux/slab.h:582 [inline] kzalloc include/linux/slab.h:703 [inline] kernfs_fop_open+0x259/0xd30 fs/kernfs/file.c:670 do_dentry_open+0x5db/0x11b0 fs/open.c:929 do_open fs/namei.c:3639 [inline] path_openat+0x18b8/0x27c0 fs/namei.c:3796 do_filp_open+0x1bc/0x400 fs/namei.c:3823 do_sys_openat2+0x12c/0x170 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __x64_sys_openat+0x134/0x1d0 fs/open.c:1448 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page_owner free stack trace missing Memory state around the buggy address: ffff88811c01f880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88811c01f900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88811c01f980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88811c01fa00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88811c01fa80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================