ci2 starts bisection 2025-01-29 22:59:59.164387364 +0000 UTC m=+36711.282799283 bisecting fixing commit since 0a51d2d4527b43c5e467ffa6897deefeaf499358 building syzkaller on 689146651cb695ec7836080377ad32933a0b9bce ensuring issue is reproducible on original commit 0a51d2d4527b43c5e467ffa6897deefeaf499358 testing commit 0a51d2d4527b43c5e467ffa6897deefeaf499358 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c45b347e9124b66b4336d3d382cee7364650080111969b464392decd2e71e024 all runs: crashed: INFO: task hung in do_rmdir representative crash: INFO: task hung in do_rmdir, types: [HANG] check whether we can drop unnecessary instrumentation disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed testing commit 0a51d2d4527b43c5e467ffa6897deefeaf499358 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5b2f054f1967fd08d2765afe1aa2e3f8fd74d635d043fe0f06c24785176fa3f3 all runs: crashed: INFO: task hung in do_rmdir representative crash: INFO: task hung in do_rmdir, types: [HANG] the bug reproduces without the instrumentation disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed kconfig minimization: base=3706 full=7305 leaves diff=2038 split chunks (needed=false): <2038> split chunk #0 of len 2038 into 5 parts testing without sub-chunk 1/5 disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed testing commit 0a51d2d4527b43c5e467ffa6897deefeaf499358 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 94a3b2ca157f811760dd0e5001911fcd927c39b42323a9ec16f58c123ae6992a all runs: crashed: INFO: task hung in do_rmdir representative crash: INFO: task hung in do_rmdir, 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 0a51d2d4527b43c5e467ffa6897deefeaf499358 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5bfad2ddf1f460ddb03e01136b9886707798353aa87fced247bbaa00bc04850a all runs: OK false negative chance: 0.000 testing without sub-chunk 3/5 disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed testing commit 0a51d2d4527b43c5e467ffa6897deefeaf499358 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9bb68f3097ffde8892004cd43cc46bbab136db576262d1b0d3f1d861747e8ff8 all runs: crashed: INFO: task hung in do_rmdir representative crash: INFO: task hung in do_rmdir, 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 0a51d2d4527b43c5e467ffa6897deefeaf499358 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 49762d39b809c57f9d0fef752601abac7362528494a18f607976105705d9767b all runs: crashed: INFO: rcu detected stall in sys_getdents representative crash: INFO: rcu detected stall in sys_getdents, 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 0a51d2d4527b43c5e467ffa6897deefeaf499358 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5051f624b50a0ce9ed1e83f158815c32ece5e1019be5071b710d0b26257abf91 all runs: crashed: INFO: rcu detected stall in sys_getdents representative crash: INFO: rcu detected stall in sys_getdents, types: [HANG] the chunk can be dropped minimized to 408 configs; suspects: [6LOWPAN ACPI_WMI ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI CHARGER_BQ24190 CMA DAX_DRIVER DLM DRM DRM_FBDEV_EMULATION DRM_VGEM DRM_VIRTIO_GPU DRM_VKMS DRM_VMWGFX DRM_VMWGFX_FBCON 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_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_BOOT_VESA_SUPPORT 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 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_USER_HELPER FW_LOADER_USER_HELPER_FALLBACK GACT_PROB GARP GENERIC_PHY 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 GVE HAVE_ARCH_USERFAULTFD_MINOR HAVE_ARCH_USERFAULTFD_WP HAVE_BOOTMEM_INFO_NODE HAVE_KVM_CPU_RELAX_INTERCEPT 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_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_LOGITECH_DJ HID_LOGITECH_HIDPP HID_MACALLY HID_MAGICMOUSE HID_MALTRON HID_MAYFLASH HID_MCP2221 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_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_SPEEDLINK HID_STEAM HID_STEELSERIES HID_THINGM HID_TIVO HID_TWINHAN HID_U2FZERO HID_UCLOGIC HID_UDRAW_PS3 HID_VIEWSONIC HID_VIVALDI 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_CP2615 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_CHT_INT33FE INTEL_IDMA64 INTEL_IOATDMA INTEL_IOMMU_DEFAULT_ON INTEL_IOMMU_SVM INTERVAL_TREE IOMMU_SVA_LIB 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_NQ IP_VS_OVF IP_VS_PE_SIP IP_VS_PROTO_AH IP_VS_PROTO_AH_ESP IP_VS_PROTO_ESP IP_VS_PROTO_SCTP IP_VS_PROTO_TCP IP_VS_PROTO_UDP IP_VS_RR IP_VS_SED IP_VS_SH IP_VS_TWOS IP_VS_WLC IP_VS_WRR IRQ_BYPASS_MANAGER IRQ_POLL IRQ_TIME_ACCOUNTING IR_IGORPLUGUSB IR_IGUANA IR_IMON IR_IMON_RAW IR_MCEUSB IR_REDRAT3 IR_STREAMZAP 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 RC_DEVICES REGULATOR RFKILL SND SOUND STAGING TRANSPARENT_HUGEPAGE TYPEC TYPEC_MUX_PI3USB30532 USB_ROLES_INTEL_XHCI USB_ROLE_SWITCH VIDEO_DEV VIDEO_V4L2 VIRTIO_FS WAN ZONE_DEVICE] disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing current HEAD 003148680b790d8c7da6f58a76d126d1a5a8aebe testing commit 003148680b790d8c7da6f58a76d126d1a5a8aebe gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9b1b0890d2a099dae3ab06efe03ed07a740cbf690545f55501af911028468770 all runs: OK false negative chance: 0.000 # git bisect start 003148680b790d8c7da6f58a76d126d1a5a8aebe 0a51d2d4527b43c5e467ffa6897deefeaf499358 Bisecting: 454 revisions left to test after this (roughly 9 steps) [1f1cf3940a36f6496f9af7433671ac088690e3d1] scsi: qla2xxx: Supported speed displayed incorrectly for VPorts determine whether the revision contains the guilty commit revision 0a51d2d4527b43c5e467ffa6897deefeaf499358 crashed and is reachable testing commit 1f1cf3940a36f6496f9af7433671ac088690e3d1 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 116076a600d5cd38754a5f6d4688e5f40565326a14eece029f028e38d953af55 all runs: crashed: INFO: rcu detected stall in sys_getdents representative crash: INFO: rcu detected stall in sys_getdents, types: [HANG] # git bisect good 1f1cf3940a36f6496f9af7433671ac088690e3d1 Bisecting: 227 revisions left to test after this (roughly 8 steps) [4b13d0d186df2d08dc4683d40ce0cf3fa8c82eb4] mtd: diskonchip: Cast an operand to prevent potential overflow determine whether the revision contains the guilty commit revision 0a51d2d4527b43c5e467ffa6897deefeaf499358 crashed and is reachable testing commit 4b13d0d186df2d08dc4683d40ce0cf3fa8c82eb4 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fb061a06cdc0a6521a73eb90d2aa3b1cc183200c3350ed18939c73ffbcdbdc17 all runs: crashed: INFO: rcu detected stall in sys_getdents representative crash: INFO: rcu detected stall in sys_getdents, types: [HANG] # git bisect good 4b13d0d186df2d08dc4683d40ce0cf3fa8c82eb4 Bisecting: 113 revisions left to test after this (roughly 7 steps) [10923508eb77ef0075b9e0cf0b126858848c4b3b] tcp/dccp: allow a connection when sk_max_ack_backlog is zero determine whether the revision contains the guilty commit revision 0a51d2d4527b43c5e467ffa6897deefeaf499358 crashed and is reachable testing commit 10923508eb77ef0075b9e0cf0b126858848c4b3b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c981783c54f8c09a75dda749facc00d5a0ec603f5da82d1a1f427ef5f7ce7f83 all runs: OK false negative chance: 0.000 # git bisect bad 10923508eb77ef0075b9e0cf0b126858848c4b3b Bisecting: 56 revisions left to test after this (roughly 6 steps) [bc509159a2235e1ba09586413905e50c3bfa6d23] RDMA/hns: Remove redundant 'bt_level' for hem_list_alloc_item() determine whether the revision contains the guilty commit revision 1f1cf3940a36f6496f9af7433671ac088690e3d1 crashed and is reachable testing commit bc509159a2235e1ba09586413905e50c3bfa6d23 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6ba05333dad03e9ea440ec05bc56d1d6dab0816e2b90ee0946215018294a9105 all runs: crashed: INFO: rcu detected stall in sys_getdents representative crash: INFO: rcu detected stall in sys_getdents, types: [HANG] # git bisect good bc509159a2235e1ba09586413905e50c3bfa6d23 Bisecting: 28 revisions left to test after this (roughly 5 steps) [01b3661663c5c581951af50691980bf8648d5725] sound: usb: enable DSD output for ddHiFi TC44C determine whether the revision contains the guilty commit revision 1f1cf3940a36f6496f9af7433671ac088690e3d1 crashed and is reachable testing commit 01b3661663c5c581951af50691980bf8648d5725 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9cf5eed4c1d2174e6f6282b6ce26001e3e847b93dda916a6508fe7901c17cb55 all runs: crashed: INFO: rcu detected stall in sys_getdents representative crash: INFO: rcu detected stall in sys_getdents, types: [HANG] # git bisect good 01b3661663c5c581951af50691980bf8648d5725 Bisecting: 14 revisions left to test after this (roughly 4 steps) [0f51034bb813a5f285100d0fc005f22e7d653292] drm: adv7511: Drop dsi single lane support determine whether the revision contains the guilty commit revision 0a51d2d4527b43c5e467ffa6897deefeaf499358 crashed and is reachable testing commit 0f51034bb813a5f285100d0fc005f22e7d653292 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: bb712e24ee7362a90e55d5f5c03c801bfb88c42189d79ffa77ff0b855d2436f7 all runs: crashed: INFO: rcu detected stall in sys_getdents representative crash: INFO: rcu detected stall in sys_getdents, types: [HANG] # git bisect good 0f51034bb813a5f285100d0fc005f22e7d653292 Bisecting: 7 revisions left to test after this (roughly 3 steps) [c850ddd1e1d89ea8add67db7efd30641e4c62e23] dm array: fix unreleased btree blocks on closing a faulty array cursor determine whether the revision contains the guilty commit revision 4b13d0d186df2d08dc4683d40ce0cf3fa8c82eb4 crashed and is reachable testing commit c850ddd1e1d89ea8add67db7efd30641e4c62e23 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5700920250a122e113d5de62710500d31b73716836d4728ac09cc988fe4cba56 all runs: crashed: INFO: rcu detected stall in sys_getdents representative crash: INFO: rcu detected stall in sys_getdents, types: [HANG] # git bisect good c850ddd1e1d89ea8add67db7efd30641e4c62e23 Bisecting: 3 revisions left to test after this (roughly 2 steps) [294b9826da0e297b54535456f910d2c3a61c5c7f] ASoC: mediatek: disable buffer pre-allocation determine whether the revision contains the guilty commit revision 1f1cf3940a36f6496f9af7433671ac088690e3d1 crashed and is reachable testing commit 294b9826da0e297b54535456f910d2c3a61c5c7f gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 576bd8b28d81393b55ce5cdb0e57e8262402a46a5a5ada868cb262742b53d77a all runs: OK false negative chance: 0.000 # git bisect bad 294b9826da0e297b54535456f910d2c3a61c5c7f Bisecting: 1 revision left to test after this (roughly 1 step) [28c21f0ac5293a4bf19b3e0e32005d6dd31a6c17] exfat: fix the infinite loop in exfat_readdir() determine whether the revision contains the guilty commit revision bc509159a2235e1ba09586413905e50c3bfa6d23 crashed and is reachable testing commit 28c21f0ac5293a4bf19b3e0e32005d6dd31a6c17 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a3eb5f8bd52375b1d3e599402daf4b2c419e9525b66dadfb81ce3a7cd17ee821 all runs: OK false negative chance: 0.000 # git bisect bad 28c21f0ac5293a4bf19b3e0e32005d6dd31a6c17 Bisecting: 0 revisions left to test after this (roughly 0 steps) [3995b25d000c00624ca3bbc681366faaa73189a5] dm array: fix cursor index when skipping across block boundaries determine whether the revision contains the guilty commit revision bc509159a2235e1ba09586413905e50c3bfa6d23 crashed and is reachable testing commit 3995b25d000c00624ca3bbc681366faaa73189a5 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5700920250a122e113d5de62710500d31b73716836d4728ac09cc988fe4cba56 all runs: crashed: INFO: rcu detected stall in sys_getdents representative crash: INFO: rcu detected stall in sys_getdents, types: [HANG] # git bisect good 3995b25d000c00624ca3bbc681366faaa73189a5 28c21f0ac5293a4bf19b3e0e32005d6dd31a6c17 is the first bad commit commit 28c21f0ac5293a4bf19b3e0e32005d6dd31a6c17 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: a3eb5f8bd52375b1d3e599402daf4b2c419e9525b66dadfb81ce3a7cd17ee821 parent signature: 5700920250a122e113d5de62710500d31b73716836d4728ac09cc988fe4cba56 revisions tested: 18, total time: 3h21m32.44849544s (build: 44m43.198172251s, test: 2h11m25.960607677s) first good commit: 28c21f0ac5293a4bf19b3e0e32005d6dd31a6c17 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): []