ci starts bisection 2023-07-11 15:32:50.20136107 +0000 UTC m=+123.568807189 bisecting fixing commit since ac9a78681b921877518763ba0e89202254349d1b building syzkaller on 90c93c40627cb0ac3c2c7cb99d807fd4c137adcb ensuring issue is reproducible on original commit ac9a78681b921877518763ba0e89202254349d1b testing commit ac9a78681b921877518763ba0e89202254349d1b gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1d04402370b3666fd473294a72f823e93698bede1360f7249a354fc7a2b3e87c all runs: crashed: possible deadlock in delete_one_xattr representative crash: possible deadlock in delete_one_xattr, types: [LOCKDEP] check whether we can drop unnecessary instrumentation disabling configs for [HANG LEAK UBSAN BUG KASAN ATOMIC_SLEEP], they are not needed testing commit ac9a78681b921877518763ba0e89202254349d1b gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: eb4a14185ce2945a0b646191a15635c4f5f631dc848d7f48c595f2053b106fc9 all runs: crashed: possible deadlock in delete_one_xattr representative crash: possible deadlock in delete_one_xattr, types: [LOCKDEP] the bug reproduces without the instrumentation disabling configs for [HANG LEAK UBSAN BUG KASAN ATOMIC_SLEEP], they are not needed kconfig minimization: base=3869 full=7595 leaves diff=1998 split chunks (needed=false): <1998> split chunk #0 of len 1998 into 5 parts testing without sub-chunk 1/5 testing commit ac9a78681b921877518763ba0e89202254349d1b gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c6e236429da55693ad427b1a0e4516164005249d092d6a4c5b8e902e678fc442 all runs: crashed: possible deadlock in delete_one_xattr representative crash: possible deadlock in delete_one_xattr, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 2/5 testing commit ac9a78681b921877518763ba0e89202254349d1b gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3db4dc57f027a16b3fa17b7abb74a8f53a266e3dd46da4e5e697fa34d86f5a71 all runs: crashed: possible deadlock in delete_one_xattr representative crash: possible deadlock in delete_one_xattr, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 3/5 testing commit ac9a78681b921877518763ba0e89202254349d1b gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 35cfe9e9024195fa97d7f2169ff7221d15e2229946639c57651f739b1806fe2f all runs: crashed: possible deadlock in delete_one_xattr representative crash: possible deadlock in delete_one_xattr, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 4/5 testing commit ac9a78681b921877518763ba0e89202254349d1b gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 188a4ab686b0c8aed8e6dab69887fb9147f1601fee4466ebc4e1b6ea176498dd all runs: OK testing without sub-chunk 5/5 testing commit ac9a78681b921877518763ba0e89202254349d1b gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 77bfd969f000d441c556a10c96cfbe142daa29aa321024d66653c123172ff4a9 all runs: crashed: possible deadlock in delete_one_xattr representative crash: possible deadlock in delete_one_xattr, types: [LOCKDEP] the chunk can be dropped minimized to 400 configs; suspects: [AF_RXRPC ARCH_ENABLE_MEMORY_HOTREMOVE ATM AX25 CC_HAS_UBSAN_BOUNDS CFG80211 CMA DAX DLM DVB_CORE ENCRYPTED_KEYS EXTCON GENEVE GPIOLIB HAMRADIO HAVE_CLK HID_SENSOR_HUB HID_SMARTJOYPLUS HID_THRUSTMASTER IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_IPOIB INFINIBAND_USER_ACCESS INFINIBAND_VIRT_DMA INPUT_TABLET INPUT_TOUCHSCREEN IP_SCTP L2TP LIBNVDIMM MEDIA_COMMON_OPTIONS MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_RETU MMC MTD MTD_UBI NETFILTER_CONNCOUNT NET_IPGRE NET_IPGRE_DEMUX NFS_V4_1 NF_TPROXY_IPV4 NF_TPROXY_IPV6 NILFS2_FS NLMON NLS_CODEPAGE_1250 NLS_CODEPAGE_1251 NLS_CODEPAGE_737 NLS_CODEPAGE_775 NLS_CODEPAGE_850 NLS_CODEPAGE_852 NLS_CODEPAGE_855 NLS_CODEPAGE_857 NLS_CODEPAGE_860 NLS_CODEPAGE_861 NLS_CODEPAGE_862 NLS_CODEPAGE_863 NLS_CODEPAGE_864 NLS_CODEPAGE_865 NLS_CODEPAGE_866 NLS_CODEPAGE_869 NLS_CODEPAGE_874 NLS_CODEPAGE_932 NLS_CODEPAGE_936 NLS_CODEPAGE_949 NLS_CODEPAGE_950 NLS_ISO8859_13 NLS_ISO8859_14 NLS_ISO8859_15 NLS_ISO8859_2 NLS_ISO8859_3 NLS_ISO8859_4 NLS_ISO8859_5 NLS_ISO8859_6 NLS_ISO8859_7 NLS_ISO8859_8 NLS_ISO8859_9 NLS_KOI8_R NLS_KOI8_U NLS_MAC_CELTIC NLS_MAC_CENTEURO NLS_MAC_CROATIAN NLS_MAC_CYRILLIC NLS_MAC_GAELIC NLS_MAC_GREEK NLS_MAC_ICELAND NLS_MAC_INUIT NLS_MAC_ROMAN NLS_MAC_ROMANIAN NLS_MAC_TURKISH NOP_USB_XCEIV NOZOMI NTFS3_FS NTFS3_FS_POSIX_ACL NTFS3_LZX_XPRESS NTFS_FS NTFS_RW NULL_TTY NUMA_BALANCING NUMA_BALANCING_DEFAULT_ENABLED NUMA_EMU NUMA_KEEP_MEMINFO NVDIMM_DAX NVDIMM_KEYS NVDIMM_PFN NVME_CORE NVME_FABRICS NVME_FC NVME_MULTIPATH NVME_RDMA NVME_TARGET NVME_TARGET_FC NVME_TARGET_FCLOOP NVME_TARGET_LOOP NVME_TARGET_RDMA NVME_TARGET_TCP NVME_TCP N_GSM N_HDLC OCFS2_DEBUG_FS OCFS2_FS OCFS2_FS_O2CB OCFS2_FS_STATS OCFS2_FS_USERSPACE_CLUSTER OF_GPIO OF_PMEM OMFS_FS OPENVSWITCH OPENVSWITCH_GENEVE OPENVSWITCH_GRE OPENVSWITCH_VXLAN ORANGEFS_FS OSF_PARTITION OVERLAY_FS OVERLAY_FS_INDEX OVERLAY_FS_REDIRECT_ALWAYS_FOLLOW OVERLAY_FS_REDIRECT_DIR PACKET_DIAG PADATA PAGE_IDLE_FLAG PAGE_POOL PAGE_POOL_STATS PAGE_REPORTING PAHOLE_HAS_SPLIT_BTF PARPORT PARPORT_NOT_PC PARTITION_ADVANCED PCCARD PCCARD_NONSTATIC PCIEAER PCI_ENDPOINT PCI_IOV PCMCIA PCMCIA_LOAD_CIS PERCPU_STATS PERSISTENT_KEYRINGS PER_VMA_LOCK_STATS PHONET PHYLINK PHY_CPCAP_USB PHY_QCOM_USB_HS PHY_QCOM_USB_HSIC PHY_SAMSUNG_USB2 PHY_TUSB1210 PKCS7_TEST_KEY PKCS8_PRIVATE_KEY_PARSER PM_CLK PNFS_BLOCK PNFS_FILE_LAYOUT PNFS_FLEXFILE_LAYOUT PPP PPPOATM PPPOE PPPOL2TP PPP_ASYNC PPP_BSDCOMP PPP_DEFLATE PPP_FILTER PPP_MPPE PPP_MULTILINK PPP_SYNC_TTY PPTP PREEMPT PREEMPT_NOTIFIERS PRISM2_USB PROC_CHILDREN PSI PSTORE PSTORE_842_COMPRESS PSTORE_COMPRESS PSTORE_DEFLATE_COMPRESS PSTORE_DEFLATE_COMPRESS_DEFAULT PSTORE_LZ4HC_COMPRESS PSTORE_LZ4_COMPRESS PSTORE_LZO_COMPRESS PSTORE_ZSTD_COMPRESS QCOM_QMI_HELPERS QNX4FS_FS QNX6FS_FS QRTR QRTR_TUN R8712U RADIO_ADAPTERS RADIO_SHARK RADIO_SHARK2 RADIO_TEA575X RAID6_PQ RAID_ATTRS RC_ATI_REMOTE RC_CORE RC_DEVICES RDMA_RXE RDMA_SIW RDS RDS_RDMA RDS_TCP READ_ONLY_THP_FOR_FS REALTEK_AUTOPM REED_SOLOMON REED_SOLOMON_DEC8 REGMAP REGMAP_I2C REGMAP_IRQ REGMAP_MMIO REGULATOR REGULATOR_TWL4030 REISERFS_FS REISERFS_FS_POSIX_ACL REISERFS_FS_SECURITY REISERFS_FS_XATTR REISERFS_PROC_INFO RESET_CONTROLLER RFKILL RFKILL_INPUT RFKILL_LEDS RMI4_2D_SENSOR RMI4_CORE RMI4_F03 RMI4_F03_SERIO RMI4_F11 RMI4_F12 RMI4_F30 ROMFS_BACKED_BY_BOTH ROMFS_FS ROMFS_ON_BLOCK ROMFS_ON_MTD ROSE RTC_DRV_HID_SENSOR_TIME RXKAD SCHED_CORE SCSI_FC_ATTRS SCSI_HPSA SCSI_ISCSI_ATTRS SCSI_LOGGING SCSI_NETLINK SCSI_SAS_ATA SCSI_SAS_ATTRS SCSI_SAS_LIBSAS SCSI_SCAN_ASYNC SCSI_SRP_ATTRS SCTP_COOKIE_HMAC_MD5 SCTP_COOKIE_HMAC_SHA1 SCTP_DEFAULT_COOKIE_HMAC_MD5 SECONDARY_TRUSTED_KEYRING SECURITY_INFINIBAND SECURITY_NETWORK_XFRM SERIAL_DEV_BUS SERIAL_DEV_CTRL_TTYPORT SERIAL_MCTRL_GPIO SGI_PARTITION SIGNATURE SIGNED_PE_FILE_VERIFICATION SLHC SLIP SLIP_COMPRESSED SLIP_MODE_SLIP6 SLIP_SMART SMARTJOYPLUS_FF SMBFS_COMMON SMC SMC_DIAG SMSC_PHY SMS_SIANO_MDTV SMS_SIANO_RC SMS_USB_DRV SND SND_ALOOP SND_BCD2000 SND_CTL_FAST_LOOKUP SND_CTL_LED SND_DEBUG SND_DMA_SGBUF SND_DRIVERS SND_DUMMY SND_DYNAMIC_MINORS SND_HDA SND_HDA_CODEC_ANALOG SND_HDA_CODEC_CA0110 SND_HDA_CODEC_CA0132 SND_HDA_CODEC_CIRRUS SND_HDA_CODEC_CMEDIA SND_HDA_CODEC_CONEXANT SND_HDA_CODEC_HDMI SND_HDA_CODEC_REALTEK SND_HDA_CODEC_SI3054 SND_HDA_CODEC_SIGMATEL SND_HDA_CODEC_VIA SND_HDA_COMPONENT SND_HDA_CORE SND_HDA_GENERIC SND_HDA_GENERIC_LEDS SND_HDA_HWDEP SND_HDA_I915 SND_HDA_INPUT_BEEP SND_HDA_INTEL SND_HDA_PATCH_LOADER SND_HDA_RECONFIG SND_HRTIMER SND_HWDEP SND_INTEL_DSP_CONFIG SND_INTEL_NHLT SND_INTEL_SOUNDWIRE_ACPI SND_JACK SND_JACK_INPUT_DEV SND_MIXER_OSS SND_OSSEMUL SND_PCI SND_PCM SND_PCMCIA SND_PCM_OSS SND_PCM_OSS_PLUGINS SND_PCM_TIMER SND_PCM_XRUN_DEBUG SND_PROC_FS SND_RAWMIDI SND_SEQUENCER SND_SEQUENCER_OSS SND_SEQ_DEVICE SND_SEQ_DUMMY SND_SEQ_HRTIMER_DEFAULT SND_SEQ_MIDI SND_SEQ_MIDI_EVENT SND_SEQ_VIRMIDI SND_SUPPORT_OLD_API SND_TIMER SND_USB SND_USB_6FIRE SND_USB_AUDIO SND_USB_AUDIO_USE_MEDIA_CONTROLLER SND_USB_CAIAQ SND_USB_CAIAQ_INPUT SND_USB_HIFACE SND_USB_LINE6 SND_USB_POD SND_USB_PODHD SND_USB_TONEPORT SND_USB_UA101 SND_USB_US122L SND_USB_USX2Y SND_USB_VARIAX SND_VERBOSE_PROCFS SND_VIRMIDI SND_VIRTIO SND_VMASTER SND_X86 SOCK_VALIDATE_XMIT SOLARIS_X86_PARTITION SONY_FF SOUND SOUND_OSS_CORE SOUND_OSS_CORE_PRECLAIM SPI SPI_DLN2 SPI_DYNAMIC SPI_MASTER SQUASHFS SQUASHFS_4K_DEVBLK_SIZE SQUASHFS_COMPILE_DECOMP_SINGLE SQUASHFS_DECOMP_SINGLE SQUASHFS_FILE_DIRECT SQUASHFS_LZ4 SQUASHFS_LZO SQUASHFS_XATTR SQUASHFS_XZ SQUASHFS_ZLIB SQUASHFS_ZSTD SSB SSB_PCIHOST_POSSIBLE SSB_PCMCIAHOST_POSSIBLE SSB_SDIOHOST_POSSIBLE STAGING STP STREAM_PARSER SUNRPC_BACKCHANNEL SUN_PARTITION SW_SYNC SYSFB SYSV68_PARTITION SYSV_FS TABLET_USB_ACECAD TABLET_USB_AIPTEK TABLET_USB_HANWANG TABLET_USB_KBTAB TABLET_USB_PEGASUS TAHVO_USB TAHVO_USB_HOST_BY_DEFAULT TASKS_TRACE_RCU TCG_CRB TCG_TIS TCG_TIS_CORE TCG_TPM TCP_CONG_BBR TCP_CONG_BIC TCP_CONG_CDG TCP_CONG_DCTCP TCP_CONG_HSTCP TCP_CONG_HTCP TCP_CONG_HYBLA TCP_CONG_ILLINOIS TCP_CONG_LP TCP_CONG_NV TCP_CONG_SCALABLE TCP_CONG_VEGAS TCP_CONG_VENO TCP_CONG_WESTWOOD TCP_CONG_YEAH TEXTSEARCH TEXTSEARCH_BM TEXTSEARCH_FSM TEXTSEARCH_KMP THERMAL_NETLINK THP_SWAP THRUSTMASTER_FF TIPC TIPC_CRYPTO TIPC_DIAG TIPC_MEDIA_IB TIPC_MEDIA_UDP TLS TLS_TOE TOUCHSCREEN_SUR40 TOUCHSCREEN_USB_3M TOUCHSCREEN_USB_COMPOSITE TOUCHSCREEN_USB_DMC_TSC10 TOUCHSCREEN_USB_E2I TOUCHSCREEN_USB_EASYTOUCH TOUCHSCREEN_USB_EGALAX TOUCHSCREEN_USB_ELO TOUCHSCREEN_USB_ETT_TC45USB TOUCHSCREEN_USB_ETURBO TOUCHSCREEN_USB_GENERAL_TOUCH TOUCHSCREEN_USB_GOTOP TOUCHSCREEN_USB_GUNZE TOUCHSCREEN_USB_IDEALTEK TOUCHSCREEN_USB_IRTOUCH TOUCHSCREEN_USB_ITM TOUCHSCREEN_USB_JASTEC TOUCHSCREEN_USB_NEXIO TOUCHSCREEN_USB_PANJIT TOUCHSCREEN_USB_ZYTRONIC TRANSPARENT_HUGEPAGE TRANSPARENT_HUGEPAGE_MADVISE TTPCI_EEPROM TTY_PRINTK TUN_VNET_CROSS_LE TWL4030_CORE TYPEC TYPEC_FUSB302 TYPEC_TCPCI TYPEC_TCPM TYPEC_TPS6598X TYPEC_UCSI UBIFS_ATIME_SUPPORT UBIFS_FS UBIFS_FS_ADVANCED_COMPR UBIFS_FS_LZO UBIFS_FS_SECURITY UBIFS_FS_XATTR UBIFS_FS_ZLIB UBIFS_FS_ZSTD UBSAN_ONLY_BOUNDS UCSI_ACPI UDF_FS UDMABUF UFS_FS UFS_FS_WRITE UHID ULTRIX_PARTITION UNICODE UNIXWARE_DISKLABEL UNIX_DIAG USB4 USB4_NET USBIP_CORE USBIP_HOST USBIP_VHCI_HCD USBIP_VUDC USBPCWATCHDOG USB_ACM USB_ADUTUX USB_AIRSPY USB_ALI_M5632 USB_AN2720 USB_APPLEDISPLAY USB_ARMLINUX USB_BDC_UDC USB_BELKIN USB_C67X00_HCD USB_CATC USB_CDC_PHONET USB_CHAOSKEY USB_CHIPIDEA USB_CHIPIDEA_HOST USB_CHIPIDEA_PCI USB_CHIPIDEA_UDC USB_CONFIGFS USB_CONFIGFS_ACM USB_CONFIGFS_ECM USB_CONFIGFS_ECM_SUBSET USB_CONFIGFS_EEM USB_CONFIGFS_F_FS USB_CONFIGFS_F_HID USB_CONFIGFS_F_LB_SS USB_CONFIGFS_F_MIDI USB_DWC2 USB_GADGET USB_MUSB_HDRC USB_NET_CDC_SUBSET USB_ROLE_SWITCH USB_STORAGE_REALTEK USB_ULPI_BUS USB_USBNET VIDEO_DEV VXLAN WIRELESS WLAN ZONE_DEVICE] disabling configs for [UBSAN BUG KASAN ATOMIC_SLEEP HANG LEAK], they are not needed testing current HEAD 3f01e9fed8454dcd89727016c3e5b2fbb8f8e50c testing commit 3f01e9fed8454dcd89727016c3e5b2fbb8f8e50c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 249d900eed37e2617fa7607cc02e9de51b3e7273f5ddbdbc5cc5b19b00434b15 all runs: crashed: possible deadlock in delete_one_xattr representative crash: possible deadlock in delete_one_xattr, types: [LOCKDEP] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 2h32m41.115982009s (build: 1h34m24.434825931s, test: 29m59.719181631s) crash still not fixed on HEAD or HEAD had kernel test errors commit msg: Merge tag 'linux-watchdog-6.5-rc2' of git://www.linux-watchdog.org/linux-watchdog crash: possible deadlock in delete_one_xattr ====================================================== WARNING: possible circular locking dependency detected 6.5.0-rc1-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.0/2250 is trying to acquire lock: ffff88810bf73fd0 (&type->i_mutex_dir_key#8/2){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:806 [inline] ffff88810bf73fd0 (&type->i_mutex_dir_key#8/2){+.+.}-{3:3}, at: xattr_rmdir fs/reiserfs/xattr.c:107 [inline] ffff88810bf73fd0 (&type->i_mutex_dir_key#8/2){+.+.}-{3:3}, at: delete_one_xattr+0x40/0xa0 fs/reiserfs/xattr.c:339 but task is already holding lock: ffff88810bf72d88 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:806 [inline] ffff88810bf72d88 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: reiserfs_for_each_xattr+0x25d/0x2e0 fs/reiserfs/xattr.c:310 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}: down_write_nested+0x2c/0xc0 kernel/locking/rwsem.c:1689 inode_lock_nested include/linux/fs.h:806 [inline] open_xa_root fs/reiserfs/xattr.c:128 [inline] open_xa_dir+0x52/0x260 fs/reiserfs/xattr.c:153 xattr_lookup+0x11/0x140 fs/reiserfs/xattr.c:396 reiserfs_xattr_set_handle+0x5f/0x4a0 fs/reiserfs/xattr.c:534 reiserfs_xattr_set+0xe9/0x160 fs/reiserfs/xattr.c:634 __vfs_setxattr+0x91/0xc0 fs/xattr.c:201 __vfs_setxattr_noperm+0x74/0x1d0 fs/xattr.c:235 vfs_setxattr+0x9a/0x180 fs/xattr.c:322 ovl_do_setxattr fs/overlayfs/overlayfs.h:262 [inline] ovl_setxattr fs/overlayfs/overlayfs.h:274 [inline] ovl_make_workdir fs/overlayfs/super.c:757 [inline] ovl_get_workdir fs/overlayfs/super.c:864 [inline] ovl_fill_super+0x645/0x1c40 fs/overlayfs/super.c:1400 vfs_get_super+0x68/0xe0 fs/super.c:1152 vfs_get_tree+0x1c/0x90 fs/super.c:1519 do_new_mount fs/namespace.c:3335 [inline] path_mount+0x478/0xb60 fs/namespace.c:3662 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount fs/namespace.c:3861 [inline] __x64_sys_mount+0x100/0x140 fs/namespace.c:3861 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #1 (&type->i_mutex_dir_key#8){++++}-{3:3}: down_write_nested+0x2c/0xc0 kernel/locking/rwsem.c:1689 inode_lock_nested include/linux/fs.h:806 [inline] lock_two_inodes+0x7b/0xb0 fs/inode.c:1143 vfs_rename+0x1bd/0xe00 fs/namei.c:4829 do_renameat2+0x51b/0x590 fs/namei.c:5009 __do_sys_rename fs/namei.c:5055 [inline] __se_sys_rename fs/namei.c:5053 [inline] __x64_sys_rename+0x3e/0x50 fs/namei.c:5053 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (&type->i_mutex_dir_key#8/2){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3142 [inline] check_prevs_add kernel/locking/lockdep.c:3261 [inline] validate_chain kernel/locking/lockdep.c:3876 [inline] __lock_acquire+0x12e6/0x1d00 kernel/locking/lockdep.c:5144 lock_acquire kernel/locking/lockdep.c:5761 [inline] lock_acquire+0xcd/0x2c0 kernel/locking/lockdep.c:5726 down_write_nested+0x2c/0xc0 kernel/locking/rwsem.c:1689 inode_lock_nested include/linux/fs.h:806 [inline] xattr_rmdir fs/reiserfs/xattr.c:107 [inline] delete_one_xattr+0x40/0xa0 fs/reiserfs/xattr.c:339 reiserfs_for_each_xattr+0x269/0x2e0 fs/reiserfs/xattr.c:312 reiserfs_delete_xattrs+0x1a/0x60 fs/reiserfs/xattr.c:365 reiserfs_evict_inode+0xb5/0x190 fs/reiserfs/inode.c:53 evict+0xc8/0x1c0 fs/inode.c:665 __dentry_kill+0xda/0x1a0 fs/dcache.c:607 dentry_kill fs/dcache.c:745 [inline] dput+0x2c2/0x500 fs/dcache.c:913 cleanup_mnt+0xa7/0x140 fs/namespace.c:1253 task_work_run+0x55/0x80 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x1a2/0x1b0 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x44/0x80 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Chain exists of: &type->i_mutex_dir_key#8/2 --> &type->i_mutex_dir_key#8 --> &type->i_mutex_dir_key#8/3 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&type->i_mutex_dir_key#8/3); lock(&type->i_mutex_dir_key#8); lock(&type->i_mutex_dir_key#8/3); lock(&type->i_mutex_dir_key#8/2); *** DEADLOCK *** 1 lock held by syz-executor.0/2250: #0: ffff88810bf72d88 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:806 [inline] #0: ffff88810bf72d88 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: reiserfs_for_each_xattr+0x25d/0x2e0 fs/reiserfs/xattr.c:310 stack backtrace: CPU: 1 PID: 2250 Comm: syz-executor.0 Not tainted 6.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x5c/0xb0 lib/dump_stack.c:106 check_noncircular+0xfc/0x110 kernel/locking/lockdep.c:2195 check_prev_add kernel/locking/lockdep.c:3142 [inline] check_prevs_add kernel/locking/lockdep.c:3261 [inline] validate_chain kernel/locking/lockdep.c:3876 [inline] __lock_acquire+0x12e6/0x1d00 kernel/locking/lockdep.c:5144 lock_acquire kernel/locking/lockdep.c:5761 [inline] lock_acquire+0xcd/0x2c0 kernel/locking/lockdep.c:5726 down_write_nested+0x2c/0xc0 kernel/locking/rwsem.c:1689 inode_lock_nested include/linux/fs.h:806 [inline] xattr_rmdir fs/reiserfs/xattr.c:107 [inline] delete_one_xattr+0x40/0xa0 fs/reiserfs/xattr.c:339 reiserfs_for_each_xattr+0x269/0x2e0 fs/reiserfs/xattr.c:312 reiserfs_delete_xattrs+0x1a/0x60 fs/reiserfs/xattr.c:365 reiserfs_evict_inode+0xb5/0x190 fs/reiserfs/inode.c:53 evict+0xc8/0x1c0 fs/inode.c:665 __dentry_kill+0xda/0x1a0 fs/dcache.c:607 dentry_kill fs/dcache.c:745 [inline] dput+0x2c2/0x500 fs/dcache.c:913 cleanup_mnt+0xa7/0x140 fs/namespace.c:1253 task_work_run+0x55/0x80 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x1a2/0x1b0 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x44/0x80 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fda85c7dc87 Code: b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffc92c199b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fda85c7dc87 RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffc92c19a70 RBP: 00007ffc92c19a70 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc92c1ab30 R13: 00007fda85cd7c5a R14: 000000000000a842 R15: 0000000000000008