ci starts bisection 2023-08-18 04:46:27.632246037 +0000 UTC m=+88027.116530488 bisecting cause commit starting from 4853c74bd7ab7fdb83f319bd9ace8a08c031e9b6 building syzkaller on 7773e940a7feacbe318f849807fe586fee985805 ensuring issue is reproducible on original commit 4853c74bd7ab7fdb83f319bd9ace8a08c031e9b6 testing commit 4853c74bd7ab7fdb83f319bd9ace8a08c031e9b6 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: da8825badb7e167d5fe6a3629181f5c4c61c78b1667892346e454a73aaf3d17e all runs: crashed: INFO: task hung in __writeback_inodes_sb_nr representative crash: INFO: task hung in __writeback_inodes_sb_nr, types: [HANG] check whether we can drop unnecessary instrumentation disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed testing commit 4853c74bd7ab7fdb83f319bd9ace8a08c031e9b6 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8621b72e73f872844c71a20636d074cecf90e423c25507c73192dad254edfc55 all runs: crashed: INFO: task hung in __writeback_inodes_sb_nr representative crash: INFO: task hung in __writeback_inodes_sb_nr, types: [HANG] the bug reproduces without the instrumentation disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed kconfig minimization: base=3883 full=7652 leaves diff=1997 split chunks (needed=false): <1997> split chunk #0 of len 1997 into 5 parts testing without sub-chunk 1/5 disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 4853c74bd7ab7fdb83f319bd9ace8a08c031e9b6 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 08a1d1b797a4abf24b7fc8eb0ba2cc8e142faed02d135ef2d7d34d654f266f04 all runs: crashed: INFO: task hung in __writeback_inodes_sb_nr representative crash: INFO: task hung in __writeback_inodes_sb_nr, types: [HANG] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 4853c74bd7ab7fdb83f319bd9ace8a08c031e9b6 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 79db79a1005936de791a3b5df05aa165bd0915b336e887c599a016da79ed2e91 all runs: OK false negative chance: 0.000 testing without sub-chunk 3/5 disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 4853c74bd7ab7fdb83f319bd9ace8a08c031e9b6 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 79c51aaa79410390041c26952a8a42eb2a9763dd099af209a4122ccbb3d99bee all runs: crashed: INFO: task hung in __writeback_inodes_sb_nr representative crash: INFO: task hung in __writeback_inodes_sb_nr, types: [HANG] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 4853c74bd7ab7fdb83f319bd9ace8a08c031e9b6 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fcbd8961bb92ee05b8eebd76daa1584aba810d8708859904cf42123b8b8cecfa run #0: crashed: BUG: soft lockup in wb_workfn run #1: crashed: BUG: soft lockup in wb_workfn run #2: crashed: INFO: task hung in synchronize_rcu run #3: crashed: BUG: soft lockup in wb_workfn run #4: crashed: BUG: soft lockup in wb_workfn run #5: crashed: INFO: task hung in __writeback_inodes_sb_nr run #6: crashed: INFO: task hung in __writeback_inodes_sb_nr run #7: crashed: BUG: soft lockup in wb_workfn run #8: crashed: BUG: soft lockup in wb_workfn run #9: crashed: BUG: soft lockup in wb_workfn representative crash: BUG: soft lockup in wb_workfn, types: [HANG] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 4853c74bd7ab7fdb83f319bd9ace8a08c031e9b6 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 83d8bc7cb39df0f8d2394ab813b05e66fa2eb45ac12f1ac9b7a48cd2c58043c2 run #0: crashed: BUG: soft lockup in corrupted run #1: crashed: BUG: soft lockup in wb_workfn run #2: crashed: BUG: soft lockup in wb_workfn run #3: crashed: BUG: soft lockup in wb_workfn run #4: crashed: BUG: soft lockup in wb_workfn run #5: crashed: BUG: soft lockup in wb_workfn run #6: crashed: BUG: soft lockup in wb_workfn run #7: crashed: BUG: soft lockup in wb_workfn run #8: crashed: BUG: soft lockup in wb_workfn run #9: crashed: BUG: soft lockup in wb_workfn representative crash: BUG: soft lockup in corrupted, types: [HANG] the chunk can be dropped minimized to 400 configs; suspects: [6LOWPAN ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI CMA COMMON_CLK DAX DLM DRM DRM_BRIDGE DRM_DISPLAY_DP_HELPER DRM_DISPLAY_HDCP_HELPER DRM_DISPLAY_HDMI_HELPER DRM_DISPLAY_HELPER DRM_DP_AUX_BUS DRM_DP_AUX_CHARDEV DRM_FBDEV_EMULATION DRM_GEM_SHMEM_HELPER DRM_I915 DRM_I915_CAPTURE_ERROR DRM_I915_COMPRESS_ERROR DRM_I915_USERPTR DRM_KMS_HELPER DRM_MIPI_DSI DRM_PANEL DRM_PANEL_BRIDGE DRM_PANEL_EDP DRM_PANEL_ORIENTATION_QUIRKS DRM_SIMPLEDRM DRM_TTM DRM_TTM_HELPER DRM_UDL DRM_VGEM DRM_VIRTIO_GPU DRM_VIRTIO_GPU_KMS DRM_VKMS DRM_VMWGFX DRM_VRAM_HELPER DUMMY DVB_AF9013 DVB_AF9033 DVB_AS102 DVB_AS102_FE DVB_B2C2_FLEXCOP DVB_B2C2_FLEXCOP_USB DVB_CORE DVB_DIB3000MB DVB_DIB3000MC DVB_EC100 DVB_GP8PSK_FE DVB_RTL2830 DVB_RTL2832 DVB_RTL2832_SDR DVB_TEST_DRIVERS DVB_TTUSB_BUDGET DVB_TTUSB_DEC DVB_USB DVB_USB_A800 DVB_USB_AF9005 DVB_USB_AF9005_REMOTE DVB_USB_AF9015 DVB_USB_AF9035 DVB_USB_ANYSEE DVB_USB_AU6610 DVB_USB_AZ6007 DVB_USB_AZ6027 DVB_USB_CE6230 DVB_USB_CINERGY_T2 DVB_USB_CXUSB DVB_USB_DIB0700 DVB_USB_DIB3000MC DVB_USB_DIBUSB_MB DVB_USB_DIBUSB_MC DVB_USB_DIGITV DVB_USB_DTT200U DVB_USB_DTV5100 DVB_USB_DVBSKY DVB_USB_DW2102 DVB_USB_EC168 DVB_USB_GL861 DVB_USB_GP8PSK DVB_USB_LME2510 DVB_USB_M920X DVB_USB_MXL111SF DVB_USB_NOVA_T_USB2 DVB_USB_OPERA1 DVB_USB_PCTV452E DVB_USB_RTL28XXU DVB_USB_TECHNISAT_USB2 DVB_USB_TTUSB2 DVB_USB_UMT_010 DVB_USB_V2 DVB_USB_VP702X DVB_USB_VP7045 DVB_USB_ZD1301 DVB_VIDTV DVB_ZL10353 ECRYPT_FS ECRYPT_FS_MESSAGING EDAC EEPROM_93CX6 EFS_FS ENCRYPTED_KEYS EQUALIZER EROFS_FS EROFS_FS_POSIX_ACL EROFS_FS_SECURITY EROFS_FS_XATTR EROFS_FS_ZIP EVM EVM_ADD_XATTRS EVM_ATTR_FSUUID EXFAT_FS EXPORTFS_BLOCK_OPS EXT3_FS EXT3_FS_POSIX_ACL EXT3_FS_SECURITY EXTCON EXTCON_INTEL_CHT_WC F2FS_CHECK_FS F2FS_FAULT_INJECTION F2FS_FS F2FS_FS_COMPRESSION F2FS_FS_LZ4 F2FS_FS_LZ4HC F2FS_FS_LZO F2FS_FS_LZORLE F2FS_FS_POSIX_ACL F2FS_FS_SECURITY F2FS_FS_XATTR F2FS_FS_ZSTD F2FS_STAT_FS FANOTIFY FANOTIFY_ACCESS_PERMISSIONS FB FB_CFB_COPYAREA FB_CFB_FILLRECT FB_CFB_IMAGEBLIT FB_DEFERRED_IO FB_IO_HELPERS FB_NOTIFY FB_SYS_COPYAREA FB_SYS_FILLRECT FB_SYS_FOPS FB_SYS_HELPERS FB_SYS_HELPERS_DEFERRED FB_SYS_IMAGEBLIT FB_TILEBLITTING FB_VESA FB_VGA16 FB_VIRTUAL FDDI FIREWIRE FIREWIRE_NET FIREWIRE_OHCI FIREWIRE_SBP2 FONT_8x16 FONT_8x8 FONT_SUPPORT FRAMEBUFFER_CONSOLE FRAMEBUFFER_CONSOLE_DETECT_PRIMARY FRAMEBUFFER_CONSOLE_ROTATION FRONTSWAP FS_DAX FS_DAX_PMD FS_ENCRYPTION FS_ENCRYPTION_ALGS FS_VERITY FS_VERITY_BUILTIN_SIGNATURES FTL FUSE_DAX FUSE_FS FW_LOADER_COMPRESS FW_LOADER_PAGED_BUF FW_LOADER_SYSFS FW_LOADER_USER_HELPER FW_LOADER_USER_HELPER_FALLBACK GACT_PROB GARP GENERIC_PHY GET_FREE_REGION GFS2_FS GFS2_FS_LOCKING_DLM GOOGLE_COREBOOT_TABLE GOOGLE_FIRMWARE GOOGLE_MEMCONSOLE GOOGLE_MEMCONSOLE_COREBOOT GOOGLE_VPD GPIOLIB GPIOLIB_IRQCHIP GPIO_ACPI GPIO_DLN2 GPIO_VIPERBOARD GREENASIA_FF GREYBUS GREYBUS_BRIDGED_PHY GREYBUS_ES2 GREYBUS_HID GREYBUS_USB GTP GUEST_PERF_EVENTS GVE HAVE_ARCH_NODE_DEV_GROUP HAVE_ARCH_USERFAULTFD_MINOR HAVE_ARCH_USERFAULTFD_WP HAVE_BOOTMEM_INFO_NODE HAVE_CLK_PREPARE HAVE_KVM_CPU_RELAX_INTERCEPT HAVE_KVM_DIRTY_RING HAVE_KVM_DIRTY_RING_ACQ_REL HAVE_KVM_DIRTY_RING_TSO HAVE_KVM_EVENTFD HAVE_KVM_IRQCHIP HAVE_KVM_IRQFD HAVE_KVM_IRQ_BYPASS HAVE_KVM_IRQ_ROUTING HAVE_KVM_MSI HAVE_KVM_NO_POLL HAVE_KVM_PFNCACHE HAVE_KVM_PM_NOTIFIER HAVE_SCHED_AVG_IRQ HDLC HDLC_CISCO HDLC_FR HDLC_PPP HDLC_RAW HDLC_RAW_ETH HDLC_X25 HDMI HFSPLUS_FS HFS_FS HID_ACCUTOUCH HID_ACRUX HID_ACRUX_FF HID_ALPS HID_APPLEIR HID_ASUS HID_AUREAL HID_BATTERY_STRENGTH HID_BETOP_FF HID_CMEDIA HID_CORSAIR HID_CP2112 HID_ELECOM HID_ELO HID_EMS_FF HID_GEMBIRD HID_GFRM HID_GREENASIA HID_GT683R HID_HOLTEK HID_ICADE HID_KEYTOUCH HID_KYE HID_LCPOWER HID_LED HID_LENOVO HID_LOGITECH_DJ HID_LOGITECH_HIDPP HID_MAGICMOUSE HID_MAYFLASH HID_MULTITOUCH HID_NTI HID_ORTEK HID_PENMOUNT HID_PICOLCD HID_PICOLCD_BACKLIGHT HID_PICOLCD_CIR HID_PICOLCD_FB HID_PICOLCD_LCD HID_PICOLCD_LEDS HID_PLANTRONICS HID_PRIMAX HID_PRODIKEYS HID_RETRODE HID_RMI HID_ROCCAT HID_SAITEK HID_SENSOR_ACCEL_3D HID_SENSOR_ALS HID_SENSOR_CUSTOM_SENSOR HID_SENSOR_DEVICE_ROTATION HID_SENSOR_GYRO_3D HID_SENSOR_HUB HID_SENSOR_HUMIDITY HID_SENSOR_IIO_COMMON HID_SENSOR_IIO_TRIGGER HID_SENSOR_INCLINOMETER_3D HID_SENSOR_MAGNETOMETER_3D HID_SENSOR_PRESS HID_SENSOR_PROX HID_SENSOR_TEMP HID_SPEEDLINK HID_STEELSERIES HID_THINGM HID_TIVO HID_TWINHAN HID_UCLOGIC HID_UDRAW_PS3 HID_WACOM HID_WALTOP HID_WIIMOTE HID_XINMO HID_ZYDACRON HMM_MIRROR HOLTEK_FF HOTPLUG_PCI_PCIE HPET_MMAP HPET_MMAP_DEFAULT HPFS_FS I2C_ALGOBIT I2C_CHARDEV I2C_DESIGNWARE_CORE I2C_DESIGNWARE_PLATFORM I2C_DIOLAN_U2C I2C_DLN2 I2C_MUX I2C_MUX_REG I2C_ROBOTFUZZ_OSIF I2C_SI4713 I2C_SLAVE I2C_SLAVE_EEPROM I2C_TINY_USB I2C_VIPERBOARD IEEE802154 IEEE802154_6LOWPAN IEEE802154_ATUSB IEEE802154_DRIVERS IEEE802154_HWSIM IEEE802154_NL802154_EXPERIMENTAL IEEE802154_SOCKET IFB IIO IIO_BUFFER IIO_KFIFO_BUF IIO_TRIGGER IIO_TRIGGERED_BUFFER IKCONFIG IKCONFIG_PROC IMA IMA_APPRAISE IMA_APPRAISE_MODSIG IMA_DEFAULT_HASH_SHA256 IMA_LSM_RULES IMA_MEASURE_ASYMMETRIC_KEYS IMA_NG_TEMPLATE IMA_QUEUE_EARLY_BOOT_KEYS IMA_READ_POLICY IMA_WRITE_POLICY INET6_ESPINTCP INET6_ESP_OFFLOAD INET6_IPCOMP INET6_TUNNEL INET6_XFRM_TUNNEL INET_AH INET_DCCP_DIAG INET_DIAG INET_DIAG_DESTROY INET_ESP INET_ESPINTCP INET_ESP_OFFLOAD INET_IPCOMP INET_MPTCP_DIAG INET_RAW_DIAG INET_SCTP_DIAG INET_TCP_DIAG INET_UDP_DIAG INET_XFRM_TUNNEL INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_ADDR_TRANS_CONFIGFS INFINIBAND_IPOIB INFINIBAND_IPOIB_CM INFINIBAND_IPOIB_DEBUG INFINIBAND_ISER INFINIBAND_ON_DEMAND_PAGING INFINIBAND_RTRS INFINIBAND_SRP INFINIBAND_USER_ACCESS INFINIBAND_USER_MAD INFINIBAND_USER_MEM INPUT_ATI_REMOTE2 INPUT_CM109 INPUT_IMS_PCU INPUT_JOYDEV INPUT_KEYSPAN_REMOTE INPUT_LEDS INPUT_MOUSEDEV INPUT_MOUSEDEV_PSAUX INPUT_POWERMATE INPUT_UINPUT INPUT_YEALINK INTEGRITY INTEGRITY_ASYMMETRIC_KEYS INTEGRITY_AUDIT INTEGRITY_SIGNATURE INTEGRITY_TRUSTED_KEYRING INTEL_IDMA64 INTEL_IOATDMA INTEL_IOMMU_DEFAULT_ON INTEL_IOMMU_SVM INTEL_ISH_HID INTEL_SOC_PMIC_CHTWC INTERVAL_TREE INTERVAL_TREE_SPAN_ITER IOMMUFD IOMMUFD_TEST IOMMU_SVA IP6_NF_MATCH_AH IP6_NF_MATCH_EUI64 IP6_NF_MATCH_FRAG IP6_NF_MATCH_HL IP6_NF_MATCH_MH IP6_NF_MATCH_OPTS IP6_NF_MATCH_RPFILTER IP6_NF_MATCH_RT IP6_NF_MATCH_SRH IP6_NF_NAT IP6_NF_RAW IP6_NF_SECURITY IP6_NF_TARGET_HL IP6_NF_TARGET_MASQUERADE IP6_NF_TARGET_NPT IP6_NF_TARGET_SYNPROXY IPV6_FOU IPV6_FOU_TUNNEL IPV6_GRE IPV6_ILA IPV6_MIP6 IPV6_MROUTE IPV6_MROUTE_MULTIPLE_TABLES IPV6_MULTIPLE_TABLES IPV6_OPTIMISTIC_DAD IPV6_PIMSM_V2 IPV6_ROUTER_PREF IPV6_ROUTE_INFO IPV6_RPL_LWTUNNEL IPV6_SEG6_BPF IPV6_SEG6_HMAC IPV6_SEG6_LWTUNNEL IPV6_SIT_6RD IPV6_SUBTREES IPV6_TUNNEL IPV6_VTI IPVLAN IPVLAN_L3S IPVTAP IP_DCCP IP_DCCP_CCID3 IP_DCCP_TFRC_LIB IP_FIB_TRIE_STATS IP_MROUTE_MULTIPLE_TABLES IP_NF_ARPFILTER IP_NF_ARPTABLES IP_NF_ARP_MANGLE IP_NF_MATCH_AH IP_NF_MATCH_ECN IP_NF_MATCH_RPFILTER IP_NF_MATCH_TTL IP_NF_RAW IP_NF_SECURITY IP_NF_TARGET_ECN IP_NF_TARGET_NETMAP IP_NF_TARGET_REDIRECT IP_NF_TARGET_SYNPROXY IP_NF_TARGET_TTL IP_ROUTE_CLASSID IP_SCTP IP_SET IP_SET_BITMAP_IP IP_SET_BITMAP_IPMAC IP_SET_BITMAP_PORT IP_SET_HASH_IP IP_SET_HASH_IPMAC IP_SET_HASH_IPMARK IP_SET_HASH_IPPORT IP_SET_HASH_IPPORTIP IP_SET_HASH_IPPORTNET IP_SET_HASH_MAC IP_SET_HASH_NET IP_SET_HASH_NETIFACE IP_SET_HASH_NETNET IP_SET_HASH_NETPORT IP_SET_HASH_NETPORTNET IP_SET_LIST_SET IP_VS IP_VS_DH IP_VS_FO IP_VS_FTP IP_VS_IPV6 IP_VS_LBLC IP_VS_LBLCR IP_VS_LC IP_VS_MH IP_VS_NFCT IP_VS_NQ IP_VS_OVF IP_VS_PROTO_TCP IRQ_TIME_ACCOUNTING LAPB LCD_CLASS_DEVICE MAC802154 MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_VIPERBOARD MPTCP MTD NETFILTER_ADVANCED NET_ACT_GACT NET_ACT_MIRRED NET_IPGRE_DEMUX NFT_FWD_NETDEV NF_TABLES NF_TABLES_NETDEV RADIO_ADAPTERS RADIO_SI4713 RAS RC_CORE RFKILL SND SOUND STAGING TRANSPARENT_HUGEPAGE VIDEO_DEV VIRTIO_FS WAN ZONE_DEVICE] disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed 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: 37838f07b7d66bfa46ccd1db76e73e0685692ed8c29a190fe700f8b779ff1323 all runs: crashed: INFO: rcu detected stall in corrupted representative crash: INFO: rcu detected stall in corrupted, types: [HANG] testing release v6.3 testing commit 457391b0380335d5e9a5babdec90ac53928b23b4 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3247fb40afee3dfc3abd935ed9bd399bec500c036a3261623ae6a69b5a60511f all runs: OK false negative chance: 0.000 # git bisect start 6995e2de6891c724bfeb2db33d7b87775f913ad1 457391b0380335d5e9a5babdec90ac53928b23b4 Bisecting: 8012 revisions left to test after this (roughly 13 steps) [d42b1c47570eb2ed818dc3fe94b2678124af109d] Merge tag 'devicetree-for-6.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux testing commit d42b1c47570eb2ed818dc3fe94b2678124af109d gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 265fb444b8c674a6bd9d670bcb07f7374813e48b9f94a2b0fa712565e8caf6fa all runs: OK false negative chance: 0.000 # git bisect good d42b1c47570eb2ed818dc3fe94b2678124af109d Bisecting: 3963 revisions left to test after this (roughly 12 steps) [58390c8ce1bddb6c623f62e7ed36383e7fa5c02f] Merge tag 'iommu-updates-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu testing commit 58390c8ce1bddb6c623f62e7ed36383e7fa5c02f gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: cdfb128d59acc45225c369506d8ead9ceba35f1c5b875244282523e542b98387 all runs: OK false negative chance: 0.000 # git bisect good 58390c8ce1bddb6c623f62e7ed36383e7fa5c02f Bisecting: 1979 revisions left to test after this (roughly 11 steps) [adfbf653a3ba6bb8bbb84ed90bf4f1533db545d3] Merge tag 'fbdev-for-6.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev testing commit adfbf653a3ba6bb8bbb84ed90bf4f1533db545d3 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e6939884886dbb47661d12bac29d9bc75438c45ec4cd6d48eefcc5cb4f019bb3 run #0: crashed: INFO: rcu detected stall in corrupted run #1: crashed: INFO: rcu detected stall in corrupted run #2: crashed: INFO: rcu detected stall in corrupted run #3: crashed: INFO: rcu detected stall in corrupted run #4: crashed: INFO: rcu detected stall in corrupted run #5: crashed: INFO: rcu detected stall in corrupted run #6: crashed: INFO: rcu detected stall in corrupted run #7: crashed: INFO: rcu detected stall in corrupted run #8: crashed: INFO: rcu detected stall in corrupted run #9: crashed: BUG: soft lockup in wb_workfn representative crash: INFO: rcu detected stall in corrupted, types: [HANG] # git bisect bad adfbf653a3ba6bb8bbb84ed90bf4f1533db545d3 Bisecting: 992 revisions left to test after this (roughly 10 steps) [d4fba4dfdcce1e23bc769591bc2e993118391b53] Merge tag 'kvm-riscv-6.4-1' of https://github.com/kvm-riscv/linux into HEAD testing commit d4fba4dfdcce1e23bc769591bc2e993118391b53 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ec5f47df5caec24fc4822a25cb933ec5c4cc2a74d6bd3fdf3bdbbafc2d55ea33 all runs: crashed: INFO: rcu detected stall in corrupted representative crash: INFO: rcu detected stall in corrupted, types: [HANG] # git bisect bad d4fba4dfdcce1e23bc769591bc2e993118391b53 Bisecting: 496 revisions left to test after this (roughly 9 steps) [3af49062b0115b55a54615109172b44f618daf97] Merge tag 'mfd-next-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd testing commit 3af49062b0115b55a54615109172b44f618daf97 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5dd849ec95a1427d3c59074225e3c96b3223ff041f49f852edcca4f4fdf9e9ac all runs: OK false negative chance: 0.000 # git bisect good 3af49062b0115b55a54615109172b44f618daf97 Bisecting: 238 revisions left to test after this (roughly 8 steps) [7994beabfbb9a15c069eba7833a00f5ff4da1172] Merge tag 'dmaengine-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine testing commit 7994beabfbb9a15c069eba7833a00f5ff4da1172 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f4cffa5a38961a900839040bf647dbf0d52bc9ba96c3aaf31704391f534af6db all runs: OK false negative chance: 0.000 # git bisect good 7994beabfbb9a15c069eba7833a00f5ff4da1172 Bisecting: 121 revisions left to test after this (roughly 7 steps) [4c9818d8652b9824c73e456dd0d73ffba1d0e64d] Merge tag 'soundwire-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire testing commit 4c9818d8652b9824c73e456dd0d73ffba1d0e64d gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3ba8b4ad746f1bd51edeb02b6cbb845f466fa1b9b7fa1535e2c2ad4eb124aec0 all runs: OK false negative chance: 0.000 # git bisect good 4c9818d8652b9824c73e456dd0d73ffba1d0e64d Bisecting: 56 revisions left to test after this (roughly 6 steps) [667de5c68440732373f571f7eac4ff44b1b93ee7] Merge tag 'thermal-6.4-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm testing commit 667de5c68440732373f571f7eac4ff44b1b93ee7 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7c9702b19789f484c93d9229ae13633376b502ee2f5541b8ffad994afe6a6ce5 all runs: OK false negative chance: 0.000 # git bisect good 667de5c68440732373f571f7eac4ff44b1b93ee7 Bisecting: 25 revisions left to test after this (roughly 5 steps) [342528ff00e8a7dd31c1ea0c0093c2289d769b39] Merge tag 'uml-for-linus-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux testing commit 342528ff00e8a7dd31c1ea0c0093c2289d769b39 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9dbe565777de8c0c0db7d611aea245fe985cce8c09a76bd8676838ad8596c5f7 all runs: crashed: INFO: rcu detected stall in corrupted representative crash: INFO: rcu detected stall in corrupted, types: [HANG] # git bisect bad 342528ff00e8a7dd31c1ea0c0093c2289d769b39 Bisecting: 14 revisions left to test after this (roughly 4 steps) [fa31fc82fb775445c176e576304c4098222f47f2] Merge tag 'pm-6.4-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm testing commit fa31fc82fb775445c176e576304c4098222f47f2 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3eeae934e17619901afdf08a26e080435ebe56a6a392d13fb01fa84c39e4633a all runs: crashed: INFO: rcu detected stall in corrupted representative crash: INFO: rcu detected stall in corrupted, types: [HANG] # git bisect bad fa31fc82fb775445c176e576304c4098222f47f2 Bisecting: 8 revisions left to test after this (roughly 3 steps) [bd4468295e7a335319c10affdf594b56f1e6c0a4] intel_idle: mark few variables as __read_mostly testing commit bd4468295e7a335319c10affdf594b56f1e6c0a4 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7dcf6477c75fd81a689daa50c3821e016148777e48ea204164ca160fcb29ce0f all runs: OK false negative chance: 0.000 # git bisect good bd4468295e7a335319c10affdf594b56f1e6c0a4 Bisecting: 4 revisions left to test after this (roughly 2 steps) [2e70a47ceafe4d71a4a402b2f7c5123cb4bf33f6] Merge branches 'acpi-pm' and 'acpi-properties' testing commit 2e70a47ceafe4d71a4a402b2f7c5123cb4bf33f6 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 40380bc90061943c9f50f8c1ad5c23a67f4de4666b8fe6512f13d0228a5a7633 all runs: OK false negative chance: 0.000 # git bisect good 2e70a47ceafe4d71a4a402b2f7c5123cb4bf33f6 Bisecting: 2 revisions left to test after this (roughly 1 step) [5904de0d735bbb3b4afe9375c5b4f9748f882945] PM: hibernate: Do not get block device exclusively in test_resume mode testing commit 5904de0d735bbb3b4afe9375c5b4f9748f882945 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1f0a431974848b90eb7b54377b792380d472d43233cca01a6e5565de9a6ad074 run #0: crashed: INFO: rcu detected stall in corrupted run #1: crashed: INFO: rcu detected stall in corrupted run #2: crashed: INFO: rcu detected stall in corrupted run #3: crashed: INFO: rcu detected stall in corrupted run #4: crashed: INFO: rcu detected stall in corrupted run #5: crashed: INFO: rcu detected stall in corrupted run #6: crashed: INFO: rcu detected stall in corrupted run #7: crashed: INFO: rcu detected stall in corrupted run #8: crashed: INFO: rcu detected stall in corrupted run #9: crashed: BUG: soft lockup in wb_workfn representative crash: INFO: rcu detected stall in corrupted, types: [HANG] # git bisect bad 5904de0d735bbb3b4afe9375c5b4f9748f882945 Bisecting: 0 revisions left to test after this (roughly 0 steps) [08169a162f97819d3e5b4a342bb9cf5137787154] PM: hibernate: Turn snapshot_test into global variable testing commit 08169a162f97819d3e5b4a342bb9cf5137787154 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f8afafd48175c9cb01edf38a29fbb4cf0d34986790d84590a17d4a047933f497 all runs: OK false negative chance: 0.000 # git bisect good 08169a162f97819d3e5b4a342bb9cf5137787154 5904de0d735bbb3b4afe9375c5b4f9748f882945 is the first bad commit commit 5904de0d735bbb3b4afe9375c5b4f9748f882945 Author: Chen Yu Date: Fri Apr 14 20:10:42 2023 +0800 PM: hibernate: Do not get block device exclusively in test_resume mode The system refused to do a test_resume because it found that the swap device has already been taken by someone else. Specifically, the swsusp_check()->blkdev_get_by_dev(FMODE_EXCL) is supposed to do this check. Steps to reproduce: dd if=/dev/zero of=/swapfile bs=$(cat /proc/meminfo | awk '/MemTotal/ {print $2}') count=1024 conv=notrunc mkswap /swapfile swapon /swapfile swap-offset /swapfile echo 34816 > /sys/power/resume_offset echo test_resume > /sys/power/disk echo disk > /sys/power/state PM: Using 3 thread(s) for compression PM: Compressing and saving image data (293150 pages)... PM: Image saving progress: 0% PM: Image saving progress: 10% ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300) ata1.00: configured for UDMA/100 ata2: SATA link down (SStatus 0 SControl 300) ata5: SATA link down (SStatus 0 SControl 300) ata6: SATA link down (SStatus 0 SControl 300) ata3: SATA link down (SStatus 0 SControl 300) ata4: SATA link down (SStatus 0 SControl 300) PM: Image saving progress: 20% PM: Image saving progress: 30% PM: Image saving progress: 40% PM: Image saving progress: 50% pcieport 0000:00:02.5: pciehp: Slot(0-5): No device found PM: Image saving progress: 60% PM: Image saving progress: 70% PM: Image saving progress: 80% PM: Image saving progress: 90% PM: Image saving done PM: hibernation: Wrote 1172600 kbytes in 2.70 seconds (434.29 MB/s) PM: S| PM: hibernation: Basic memory bitmaps freed PM: Image not found (code -16) This is because when using the swapfile as the hibernation storage, the block device where the swapfile is located has already been mounted by the OS distribution(usually mounted as the rootfs). This is not an issue for normal hibernation, because software_resume()->swsusp_check() happens before the block device(rootfs) mount. But it is a problem for the test_resume mode. Because when test_resume happens, the block device has been mounted already. Thus remove the FMODE_EXCL for test_resume mode. This would not be a problem because in test_resume stage, the processes have already been frozen, and the race condition described in Commit 39fbef4b0f77 ("PM: hibernate: Get block device exclusively in swsusp_check()") is unlikely to happen. Fixes: 39fbef4b0f77 ("PM: hibernate: Get block device exclusively in swsusp_check()") Reported-by: Yifan Li Suggested-by: Pavankumar Kondeti Tested-by: Pavankumar Kondeti Tested-by: Wendy Wang Signed-off-by: Chen Yu Signed-off-by: Rafael J. Wysocki kernel/power/hibernate.c | 8 ++++++-- kernel/power/swap.c | 8 ++++++-- 2 files changed, 12 insertions(+), 4 deletions(-) accumulated error probability: 0.00 culprit signature: 1f0a431974848b90eb7b54377b792380d472d43233cca01a6e5565de9a6ad074 parent signature: f8afafd48175c9cb01edf38a29fbb4cf0d34986790d84590a17d4a047933f497 revisions tested: 23, total time: 8h23m19.833924367s (build: 4h59m27.512863301s, test: 3h9m7.510379933s) first bad commit: 5904de0d735bbb3b4afe9375c5b4f9748f882945 PM: hibernate: Do not get block device exclusively in test_resume mode recipients (to): ["quic_pkondeti@quicinc.com" "rafael.j.wysocki@intel.com" "wendy.wang@intel.com" "yu.c.chen@intel.com"] recipients (cc): [] crash: INFO: rcu detected stall in corrupted rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (10000 ticks this GP) idle=64bc/1/0x4000000000000000 softirq=6109/6109 fqs=5000 rcu: hardirqs softirqs csw/system rcu: number: 0 0 0 rcu: cputime: 40 0 49949 ==> 50000(ms) rcu: (t=10002 jiffies g=729 q=206 ncpus=2) CPU: 0 PID: 1073 Comm: kworker/u4:3 Not tainted 6.3.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Workqueue: writeback wb_workfn (flush-7:0) RIP: 0010:__find_get_block_slow fs/buffer.c:202 [inline] RIP: 0010:__find_get_block fs/buffer.c:1350 [inline] RIP: 0010:__find_get_block+0xf3/0x3d0 fs/buffer.c:1344 Code: 65 8b 05 ac b8 d3 7e 89 c0 48 0f a3 05 a6 d1 f7 01 0f 82 40 02 00 00 48 8b 7d 10 e8 17 10 ee ff e9 9e 00 00 00 fb 4d 8b 75 30 0c 00 00 00 4c 89 e6 ba 01 00 00 00 41 2a 8e ca 00 00 00 49 8b RSP: 0018:ffffc90002e3ba78 EFLAGS: 00000246 RAX: 000000000000000f RBX: 0000000000000010 RCX: 0000000000000100 RDX: 0000000000000200 RSI: ffffffff82b18933 RDI: ffffffff82ad46eb RBP: 0000000000000000 R08: ffffea0005e57400 R09: ffff88810270a538 R10: 0000000000000000 R11: 0000000000000003 R12: 00000000000000a0 R13: ffff8881105b8000 R14: ffff8881105b85c8 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0512200000 CR3: 00000001086b0000 CR4: 0000000000350ef0 Call Trace: __getblk_slow fs/buffer.c:1077 [inline] __getblk_gfp+0x9e/0x520 fs/buffer.c:1376 __bread_gfp+0xb/0xe0 fs/buffer.c:1410 sb_bread include/linux/buffer_head.h:341 [inline] exfat_get_dentry_set+0xc0/0x330 fs/exfat/dir.c:876 __exfat_write_inode+0x94/0x200 fs/exfat/inode.c:45 exfat_write_inode+0x34/0x50 fs/exfat/inode.c:94 write_inode fs/fs-writeback.c:1456 [inline] __writeback_single_inode+0x30d/0x3e0 fs/fs-writeback.c:1668 writeback_sb_inodes+0x1f3/0x4d0 fs/fs-writeback.c:1894 wb_writeback+0xed/0x350 fs/fs-writeback.c:2068 wb_do_writeback fs/fs-writeback.c:2211 [inline] wb_workfn+0xdd/0x550 fs/fs-writeback.c:2251 process_one_work+0x285/0x4e0 kernel/workqueue.c:2390 worker_thread+0x4e/0x330 kernel/workqueue.c:2537 kthread+0xde/0x110 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308