ci2 starts bisection 2025-02-05 11:03:15.886350841 +0000 UTC m=+51082.820355621 bisecting fixing commit since 563edd786f0a115e983594efe6b0ae26fb7678fa building syzkaller on d3ccff6372e07c6aabd02b5da419aa6492b5f0ad ensuring issue is reproducible on original commit 563edd786f0a115e983594efe6b0ae26fb7678fa testing commit 563edd786f0a115e983594efe6b0ae26fb7678fa gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: cb4e63dd65f7edf30f323c48bc849bc9064e92d594474761919676c9faf8e189 all runs: crashed: INFO: task hung in __fdget_pos representative crash: INFO: task hung in __fdget_pos, types: [HANG] check whether we can drop unnecessary instrumentation disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], they are not needed testing commit 563edd786f0a115e983594efe6b0ae26fb7678fa gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d6a94ea7869f4a05a518865ad9195ee5344ead0558de5546f8432c2252e673ac all runs: crashed: INFO: task hung in __fdget_pos representative crash: INFO: task hung in __fdget_pos, types: [HANG] the bug reproduces without the instrumentation disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed kconfig minimization: base=3824 full=7500 leaves diff=2069 split chunks (needed=false): <2069> split chunk #0 of len 2069 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 563edd786f0a115e983594efe6b0ae26fb7678fa gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 181bd0df20d654ab19199f3e66e757e7ecf3262d1d8c5f0e36eaa8d6c48645d1 all runs: crashed: INFO: task hung in __fdget_pos representative crash: INFO: task hung in __fdget_pos, types: [HANG] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed testing commit 563edd786f0a115e983594efe6b0ae26fb7678fa gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d6a4f5f47d0d5fb646b60632e0edc3377433d74d0a0f08cbef6c2c721f408410 all runs: OK false negative chance: 0.000 testing without sub-chunk 3/5 disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed testing commit 563edd786f0a115e983594efe6b0ae26fb7678fa gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ed2a02904c5249f8b0b70d997beb8633a176794551a95bfaa9b65ab09905355d all runs: crashed: INFO: task hung in __fdget_pos representative crash: INFO: task hung in __fdget_pos, types: [HANG] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed testing commit 563edd786f0a115e983594efe6b0ae26fb7678fa gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e5219b082602ede19c11a37557308bbaa6f2c0023a7e66c97215c1212d4c833e all runs: crashed: INFO: rcu detected stall in corrupted representative crash: INFO: rcu detected stall in corrupted, types: [HANG] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed testing commit 563edd786f0a115e983594efe6b0ae26fb7678fa gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a2d45456b886f11b20da2cd0beb19de347a8a97a490da7bcd96c2acb7f5a70f7 all runs: crashed: INFO: rcu detected stall in corrupted representative crash: INFO: rcu detected stall in corrupted, types: [HANG] the chunk can be dropped minimized to 414 configs; suspects: [6LOWPAN ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI CHARGER_BQ24190 CMA COMMON_CLK DAX DLM DRM DRM_PANEL DRM_PANEL_EDP DRM_PANEL_ORIENTATION_QUIRKS DRM_SIMPLEDRM DRM_TTM DRM_TTM_HELPER DRM_UDL DRM_VGEM DRM_VIRTIO_GPU 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_CXUSB_ANALOG 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 EXTCON_PTN5150 EXTCON_USBC_TUSB320 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_CMDLINE FB_DEFERRED_IO FB_NOTIFY FB_SYS_COPYAREA FB_SYS_FILLRECT FB_SYS_FOPS 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 GNSS GNSS_USB 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_BIGBEN_FF HID_CMEDIA HID_CORSAIR HID_COUGAR HID_CP2112 HID_CREATIVE_SB0540 HID_ELAN HID_ELECOM HID_ELO HID_EMS_FF HID_FT260 HID_GEMBIRD HID_GFRM HID_GLORIOUS HID_GREENASIA HID_GT683R HID_HOLTEK HID_ICADE HID_JABRA HID_KEYTOUCH HID_KYE HID_LCPOWER HID_LED HID_LENOVO HID_LETSKETCH HID_LOGITECH_DJ HID_LOGITECH_HIDPP HID_MACALLY HID_MAGICMOUSE HID_MALTRON HID_MAYFLASH HID_MCP2221 HID_MEGAWORLD_FF 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_PXRC HID_RAZER HID_RETRODE HID_RMI HID_ROCCAT HID_SAITEK HID_SEMITEK HID_SENSOR_ACCEL_3D HID_SENSOR_ALS HID_SENSOR_CUSTOM_INTEL_HINGE 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_SIGMAMICRO HID_SPEEDLINK HID_STEAM HID_STEELSERIES HID_THINGM HID_TIVO HID_TOPRE HID_TWINHAN HID_U2FZERO HID_UCLOGIC HID_UDRAW_PS3 HID_VIEWSONIC HID_VIVALDI HID_VIVALDI_COMMON HID_VRC2 HID_WACOM HID_WALTOP HID_WIIMOTE HID_XIAOMI HID_XINMO HID_ZYDACRON HMM_MIRROR HOLTEK_FF HOTPLUG_PCI_PCIE HPET_MMAP HPET_MMAP_DEFAULT HPFS_FS I2C_ALGOBIT I2C_CHARDEV I2C_CP2615 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_CHTWC_INT33FE INTEL_IDMA64 INTEL_IOATDMA INTEL_IOMMU_DEFAULT_ON INTEL_IOMMU_SVM INTEL_SOC_PMIC_CHTWC INTERVAL_TREE 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_CLUSTERIP 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_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 REGULATOR RFKILL SND SOUND STAGING TRANSPARENT_HUGEPAGE TYPEC TYPEC_MUX_PI3USB30532 USB_ROLES_INTEL_XHCI USB_ROLE_SWITCH VIDEO_DEV VIRTIO_FS WAN ZONE_DEVICE] disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed testing current HEAD 0cbb5f65e52f3e66410a7fe0edf75e1b2bf41e80 testing commit 0cbb5f65e52f3e66410a7fe0edf75e1b2bf41e80 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5efbea250f6032a9abf65cf44cd66ac21e4a09a4a347d7fbeee1db2d8eba275c all runs: OK false negative chance: 0.000 # git bisect start 0cbb5f65e52f3e66410a7fe0edf75e1b2bf41e80 563edd786f0a115e983594efe6b0ae26fb7678fa Bisecting: 177 revisions left to test after this (roughly 8 steps) [13e41c58c74baa71f34c0830eaa3c29d53a6e964] ksmbd: fix unexpectedly changed path in ksmbd_vfs_kern_path_locked determine whether the revision contains the guilty commit revision 563edd786f0a115e983594efe6b0ae26fb7678fa crashed and is reachable testing commit 13e41c58c74baa71f34c0830eaa3c29d53a6e964 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 71724c345453e9d7758aea3aa99837c9fab40bca3e1f617ffdfd6a99e5943935 all runs: OK false negative chance: 0.000 # git bisect bad 13e41c58c74baa71f34c0830eaa3c29d53a6e964 Bisecting: 88 revisions left to test after this (roughly 7 steps) [28f1e04d91f67163dfd4d81653c69395938ef834] net: stmmac: restructure the error path of stmmac_probe_config_dt() determine whether the revision contains the guilty commit revision 563edd786f0a115e983594efe6b0ae26fb7678fa crashed and is reachable testing commit 28f1e04d91f67163dfd4d81653c69395938ef834 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f5e007c3d5d003bb16fa72f9b34c2b4eb419ac1488c6526efea1449ad117b900 all runs: crashed: INFO: rcu detected stall in corrupted representative crash: INFO: rcu detected stall in corrupted, types: [HANG] # git bisect good 28f1e04d91f67163dfd4d81653c69395938ef834 Bisecting: 44 revisions left to test after this (roughly 6 steps) [0310cbad163a908d09d99c26827859365cd71fcb] pinctrl: mcp23s08: Fix sleeping in atomic context due to regmap locking determine whether the revision contains the guilty commit revision 563edd786f0a115e983594efe6b0ae26fb7678fa crashed and is reachable testing commit 0310cbad163a908d09d99c26827859365cd71fcb gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9882c85b1734dd4e8694de5810b8dc1e3f7aa166c002858c910ad60bbc21baa2 all runs: crashed: INFO: rcu detected stall in corrupted representative crash: INFO: rcu detected stall in corrupted, types: [HANG] # git bisect good 0310cbad163a908d09d99c26827859365cd71fcb Bisecting: 22 revisions left to test after this (roughly 5 steps) [939d239fe8319e563002c137842b5599574cc2b2] scripts/sorttable: fix orc_sort_cmp() to maintain symmetry and transitivity determine whether the revision contains the guilty commit revision 0310cbad163a908d09d99c26827859365cd71fcb crashed and is reachable testing commit 939d239fe8319e563002c137842b5599574cc2b2 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: aa0eaa215d76cbf01de8a2dd7ea856a1b80db1e03a34c6e2a692feb6257d9742 all runs: OK false negative chance: 0.000 # git bisect bad 939d239fe8319e563002c137842b5599574cc2b2 Bisecting: 10 revisions left to test after this (roughly 4 steps) [c63962be84ef9c4f32e2a57404ceeda330ff3beb] Linux 6.1.124 determine whether the revision contains the guilty commit revision 28f1e04d91f67163dfd4d81653c69395938ef834 crashed and is reachable testing commit c63962be84ef9c4f32e2a57404ceeda330ff3beb gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 0fcb6aaa3c627165f2964a4655230ee11558d3040d2beb66c0ad82404bb9f47a all runs: crashed: INFO: rcu detected stall in corrupted representative crash: INFO: rcu detected stall in corrupted, types: [HANG] # git bisect good c63962be84ef9c4f32e2a57404ceeda330ff3beb Bisecting: 5 revisions left to test after this (roughly 3 steps) [5af095cb862bf39914d51551917105b99c290e08] jbd2: flush filesystem device before updating tail sequence determine whether the revision contains the guilty commit revision c63962be84ef9c4f32e2a57404ceeda330ff3beb crashed and is reachable testing commit 5af095cb862bf39914d51551917105b99c290e08 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3efec7e6275c18338c7dfac9529734851177d2e21918c25d14a7b6892e30d344 all runs: crashed: INFO: rcu detected stall in corrupted representative crash: INFO: rcu detected stall in corrupted, types: [HANG] # git bisect good 5af095cb862bf39914d51551917105b99c290e08 Bisecting: 2 revisions left to test after this (roughly 2 steps) [43c38c3b73e936bd4259872e61d9adcc60d2bd8e] dm array: fix cursor index when skipping across block boundaries determine whether the revision contains the guilty commit revision 28f1e04d91f67163dfd4d81653c69395938ef834 crashed and is reachable testing commit 43c38c3b73e936bd4259872e61d9adcc60d2bd8e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: cd4fea911b5ddcf0fe6ce06143290df119ac8c587403145227bd42909a6e20c2 all runs: crashed: INFO: rcu detected stall in corrupted representative crash: INFO: rcu detected stall in corrupted, types: [HANG] # git bisect good 43c38c3b73e936bd4259872e61d9adcc60d2bd8e Bisecting: 0 revisions left to test after this (roughly 1 step) [d23f2621fc550127a2436012fea6124dabe8bbff] exfat: fix the infinite loop in __exfat_free_cluster() determine whether the revision contains the guilty commit revision 0310cbad163a908d09d99c26827859365cd71fcb crashed and is reachable testing commit d23f2621fc550127a2436012fea6124dabe8bbff gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e8017aa73d88abff42bb89de38a99a291575c5992adb98c043c8edd65ef66c93 all runs: OK false negative chance: 0.000 # git bisect bad d23f2621fc550127a2436012fea6124dabe8bbff Bisecting: 0 revisions left to test after this (roughly 0 steps) [31beabd0f47f8c3ed9965ba861c9e5b252d4920a] exfat: fix the infinite loop in exfat_readdir() determine whether the revision contains the guilty commit revision 28f1e04d91f67163dfd4d81653c69395938ef834 crashed and is reachable testing commit 31beabd0f47f8c3ed9965ba861c9e5b252d4920a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5dec7309cf42165ac5a1280bce68ff11714d082a9342e254f9b61fb0285ad579 all runs: OK false negative chance: 0.000 # git bisect bad 31beabd0f47f8c3ed9965ba861c9e5b252d4920a 31beabd0f47f8c3ed9965ba861c9e5b252d4920a is the first bad commit commit 31beabd0f47f8c3ed9965ba861c9e5b252d4920a Author: Yuezhang Mo Date: Fri Dec 13 13:08:37 2024 +0800 exfat: fix the infinite loop in exfat_readdir() [ Upstream commit fee873761bd978d077d8c55334b4966ac4cb7b59 ] If the file system is corrupted so that a cluster is linked to itself in the cluster chain, and there is an unused directory entry in the cluster, 'dentry' will not be incremented, causing condition 'dentry < max_dentries' unable to prevent an infinite loop. This infinite loop causes s_lock not to be released, and other tasks will hang, such as exfat_sync_fs(). This commit stops traversing the cluster chain when there is unused directory entry in the cluster to avoid this infinite loop. Reported-by: syzbot+205c2644abdff9d3f9fc@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=205c2644abdff9d3f9fc Tested-by: syzbot+205c2644abdff9d3f9fc@syzkaller.appspotmail.com Fixes: ca06197382bd ("exfat: add directory operations") Signed-off-by: Yuezhang Mo Reviewed-by: Sungjong Seo Signed-off-by: Namjae Jeon Signed-off-by: Sasha Levin fs/exfat/dir.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) accumulated error probability: 0.00 culprit signature: 5dec7309cf42165ac5a1280bce68ff11714d082a9342e254f9b61fb0285ad579 parent signature: cd4fea911b5ddcf0fe6ce06143290df119ac8c587403145227bd42909a6e20c2 revisions tested: 17, total time: 3h7m1.151403828s (build: 51m58.676218085s, test: 2h9m2.735303498s) first good commit: 31beabd0f47f8c3ed9965ba861c9e5b252d4920a exfat: fix the infinite loop in exfat_readdir() recipients (to): ["linkinjeon@kernel.org" "sashal@kernel.org" "sj1557.seo@samsung.com" "syzbot+205c2644abdff9d3f9fc@syzkaller.appspotmail.com" "yuezhang.mo@sony.com"] recipients (cc): []