ci2 starts bisection 2025-08-15 12:59:02.416622121 +0000 UTC m=+38359.969098693
bisecting fixing commit since 60ceadf9247ef7d45bb1dce8fc7b48c888ba7a54
building syzkaller on f2cb035c8f931efff4a020b164e657f16f51934b
ensuring issue is reproducible on original commit 60ceadf9247ef7d45bb1dce8fc7b48c888ba7a54
testing commit 60ceadf9247ef7d45bb1dce8fc7b48c888ba7a54 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: d9b0f0749a4ddfd09bf58a4e7842b32d9b3ded0066705309a81e7dfb737459f7
all runs: crashed: INFO: task hung in lmLogClose
representative crash: INFO: task hung in lmLogClose, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [kasan locking atomic_sleep memleak ubsan bug_or_warning], they are not needed
testing commit 60ceadf9247ef7d45bb1dce8fc7b48c888ba7a54 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: a5b3539dc90e7b15d09c6dd3837f0e64d54599d6e31cddcd8611596705a74f5c
all runs: crashed: INFO: task hung in lmLogClose
representative crash: INFO: task hung in lmLogClose, types: [HANG]
the bug reproduces without the instrumentation
disabling configs for [kasan locking atomic_sleep memleak ubsan bug_or_warning], they are not needed
kconfig minimization: base=3829 full=7500 leaves diff=2070
split chunks (needed=false): <2070>
split chunk #0 of len 2070 into 5 parts
testing without sub-chunk 1/5
disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed
testing commit 60ceadf9247ef7d45bb1dce8fc7b48c888ba7a54 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 36c4c3db6c7271eac2ef85c0d7fabd90d0d02f3d77b5c4dc6fb434368026ab72
all runs: crashed: INFO: task hung in lmLogClose
representative crash: INFO: task hung in lmLogClose, types: [HANG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [kasan locking atomic_sleep memleak ubsan bug_or_warning], they are not needed
testing commit 60ceadf9247ef7d45bb1dce8fc7b48c888ba7a54 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 9f40e282e53ba19ef35c6ab87a1e5f627b6006144c51dc9d9a76fe81ff3345cc
all runs: crashed: INFO: task hung in lmLogClose
representative crash: INFO: task hung in lmLogClose, types: [HANG]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [atomic_sleep memleak ubsan bug_or_warning kasan locking], they are not needed
testing commit 60ceadf9247ef7d45bb1dce8fc7b48c888ba7a54 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 0fef8e12f43ffca55f79e15ec1dfd886787b9dc0e4a0b8249efb282d60a47067
all runs: OK
false negative chance: 0.000
testing without sub-chunk 4/5
disabling configs for [kasan locking atomic_sleep memleak ubsan bug_or_warning], they are not needed
testing commit 60ceadf9247ef7d45bb1dce8fc7b48c888ba7a54 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: a4a29b1e3f0a056c29635911f15d180851cf9be174415270ca267e9c375ea145
all runs: crashed: INFO: task hung in lmLogClose
representative crash: INFO: task hung in lmLogClose, types: [HANG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [atomic_sleep memleak ubsan bug_or_warning kasan locking], they are not needed
testing commit 60ceadf9247ef7d45bb1dce8fc7b48c888ba7a54 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 8eadb8237fd6fa3e748ab55c2e78b93d02cc90ebc72d0b5f81f9ba16e504bacf
all runs: crashed: INFO: task hung in lmLogClose
representative crash: INFO: task hung in lmLogClose, types: [HANG]
the chunk can be dropped
minimized to 414 configs; suspects: [AX25 BRIDGE BRIDGE_NETFILTER CAN CFG80211 CHECKPOINT_RESTORE DVB_CORE FB FSCACHE HAMRADIO HID_NINTENDO HSR INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_USER_ACCESS INPUT_JOYSTICK INPUT_MOUSE IP6_NF_RAW IPV6_MULTIPLE_TABLES IP_NF_RAW IP_SET IP_VS 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_UDP IP_VS_RR IP_VS_SED IP_VS_SH IP_VS_TWOS IP_VS_WLC IP_VS_WRR IRQ_BYPASS_MANAGER IRQ_POLL IR_IGORPLUGUSB IR_IGUANA IR_IMON IR_IMON_RAW IR_MCEUSB IR_REDRAT3 IR_STREAMZAP IR_TOY IR_TTUSBIR ISDN ISDN_CAPI_MIDDLEWARE JFFS2_CMODE_PRIORITY JFFS2_COMPRESSION_OPTIONS JFFS2_FS JFFS2_FS_POSIX_ACL JFFS2_FS_SECURITY JFFS2_FS_WRITEBUFFER JFFS2_FS_XATTR JFFS2_LZO JFFS2_RTIME JFFS2_RUBIN JFFS2_SUMMARY JFFS2_ZLIB JFS_DEBUG JFS_FS JFS_POSIX_ACL JFS_SECURITY JOYSTICK_IFORCE JOYSTICK_IFORCE_USB JOYSTICK_PXRC JOYSTICK_XPAD JOYSTICK_XPAD_FF JOYSTICK_XPAD_LEDS KARMA_PARTITION KCOV KCOV_ENABLE_COMPARISONS KCOV_INSTRUMENT_ALL KEYS_REQUEST_CACHE KEY_DH_OPERATIONS KEY_NOTIFICATIONS KSM KVM KVM_AMD KVM_ASYNC_PF KVM_COMPAT KVM_GENERIC_DIRTYLOG_READ_PROTECT KVM_MMIO KVM_VFIO KVM_XEN KVM_XFER_TO_GUEST_WORK L2TP L2TP_ETH L2TP_IP L2TP_V3 LAPB LAPBETHER LDM_PARTITION LD_IS_BFD LEDS_TRIGGER_AUDIO LEGACY_PTYS LIBCRC32C LIBNVDIMM LINEAR_RANGES LLC LLC2 LOGIG940_FF LOGIRUMBLEPAD2_FF LOGO LOGO_LINUX_MONO LOGO_LINUX_VGA16 LPC_ICH LWTUNNEL LWTUNNEL_BPF LZ4HC_COMPRESS LZ4_COMPRESS MAC80211 MAC80211_DEBUGFS MAC80211_HAS_RC MAC80211_HWSIM MAC80211_MESH MAC80211_RC_DEFAULT_MINSTREL MAC80211_RC_MINSTREL MACSEC MACVLAN MACVTAP MAC_PARTITION MAPPING_DIRTY_HELPERS MDIO_MVUSB MD_LINEAR MD_MULTIPATH MD_RAID0 MD_RAID1 MD_RAID10 MD_RAID456 MEDIA_ANALOG_TV_SUPPORT MEDIA_ATTACH MEDIA_CONTROLLER MEDIA_CONTROLLER_DVB MEDIA_CONTROLLER_REQUEST_API MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_SUPPORT_FILTER MEDIA_TUNER MEDIA_TUNER_MSI001 MEMORY_BALLOON MEMORY_HOTPLUG MEMORY_HOTPLUG_DEFAULT_ONLINE MEMORY_ISOLATION MEMREGION MEMSTICK MEMSTICK_REALTEK_USB MEM_SOFT_DIRTY MFD_CORE MFD_SYSCON MHI_BUS MHI_WWAN_CTRL MHP_MEMMAP_ON_MEMORY MICROCHIP_PHY MINIX_FS MINIX_SUBPARTITION MISC_RTSX MISC_RTSX_USB MISDN MISDN_DSP MISDN_HFCUSB MISDN_L1OIP MKISS MLX4_CORE MLX4_INFINIBAND MMC MMC_REALTEK_USB MMC_USHC MMC_VUB300 MMU_NOTIFIER MODULE_SRCVERSION_ALL MODVERSIONS MOST MOST_USB_HDM MOUSE_APPLETOUCH MOUSE_BCM5974 MOUSE_PS2 MOUSE_PS2_ALPS MOUSE_PS2_BYD MOUSE_PS2_CYPRESS MOUSE_PS2_FOCALTECH MOUSE_PS2_LIFEBOOK MOUSE_PS2_LOGIPS2PP MOUSE_PS2_SMBUS MOUSE_PS2_SYNAPTICS MOUSE_PS2_SYNAPTICS_SMBUS MOUSE_PS2_TRACKPOINT MOUSE_SYNAPTICS_USB MPLS MPLS_IPTUNNEL MPLS_ROUTING MPTCP MPTCP_IPV6 MRP MTD MTD_BLKDEVS MTD_BLOCK MTD_BLOCK2MTD MTD_CFI_I1 MTD_CFI_I2 MTD_MAP_BANK_WIDTH_1 MTD_MAP_BANK_WIDTH_2 MTD_MAP_BANK_WIDTH_4 MTD_MTDRAM MTD_PHRAM MTD_SLRAM MUSB_PIO_ONLY ND_BTT ND_CLAIM ND_PFN NETDEVSIM NETFILTER_ADVANCED NETFILTER_FAMILY_ARP NETFILTER_FAMILY_BRIDGE NETFILTER_NETLINK_ACCT NETFILTER_NETLINK_GLUE_CT NETFILTER_NETLINK_OSF NETFILTER_NETLINK_QUEUE NETFILTER_SYNPROXY NETFILTER_XT_CONNMARK NETFILTER_XT_MATCH_BPF NETFILTER_XT_MATCH_CGROUP NETFILTER_XT_MATCH_CLUSTER NETFILTER_XT_MATCH_COMMENT NETFILTER_XT_MATCH_CONNBYTES NETFILTER_XT_MATCH_CONNLABEL NETFILTER_XT_MATCH_CONNLIMIT NETFILTER_XT_MATCH_CONNMARK NETFILTER_XT_MATCH_CPU NETFILTER_XT_MATCH_DCCP NETFILTER_XT_MATCH_DEVGROUP NETFILTER_XT_MATCH_DSCP NETFILTER_XT_MATCH_ECN NETFILTER_XT_MATCH_ESP NETFILTER_XT_MATCH_HASHLIMIT NETFILTER_XT_MATCH_HELPER NETFILTER_XT_MATCH_HL NETFILTER_XT_MATCH_IPCOMP NETFILTER_XT_MATCH_IPRANGE NETFILTER_XT_MATCH_IPVS NETFILTER_XT_MATCH_L2TP NETFILTER_XT_MATCH_LENGTH NETFILTER_XT_MATCH_LIMIT NETFILTER_XT_MATCH_MAC NETFILTER_XT_MATCH_MARK NETFILTER_XT_MATCH_MULTIPORT NETFILTER_XT_MATCH_NFACCT NETFILTER_XT_MATCH_OSF NETFILTER_XT_MATCH_OWNER NETFILTER_XT_MATCH_PHYSDEV NETFILTER_XT_MATCH_PKTTYPE NETFILTER_XT_MATCH_QUOTA NETFILTER_XT_MATCH_RATEEST NETFILTER_XT_MATCH_REALM NETFILTER_XT_MATCH_RECENT NETFILTER_XT_MATCH_SCTP NETFILTER_XT_MATCH_SOCKET NETFILTER_XT_MATCH_STATISTIC NETFILTER_XT_MATCH_STRING NETFILTER_XT_MATCH_TCPMSS NETFILTER_XT_MATCH_TIME NETFILTER_XT_MATCH_U32 NETFILTER_XT_SET NETFILTER_XT_TARGET_AUDIT NETFILTER_XT_TARGET_CHECKSUM NETFILTER_XT_TARGET_CLASSIFY NETFILTER_XT_TARGET_CONNMARK NETFILTER_XT_TARGET_CT NETFILTER_XT_TARGET_DSCP NETFILTER_XT_TARGET_HL NETFILTER_XT_TARGET_HMARK NETFILTER_XT_TARGET_IDLETIMER NETFILTER_XT_TARGET_LED NETFILTER_XT_TARGET_MARK NETFILTER_XT_TARGET_NETMAP NETFILTER_XT_TARGET_NFQUEUE NETFILTER_XT_TARGET_NOTRACK NETFILTER_XT_TARGET_RATEEST NETFILTER_XT_TARGET_REDIRECT NETFILTER_XT_TARGET_TCPOPTSTRIP NETFILTER_XT_TARGET_TEE NETFILTER_XT_TARGET_TPROXY NETFILTER_XT_TARGET_TRACE NETLABEL NETLINK_DIAG NETROM NET_9P_RDMA NET_ACT_BPF NET_ACT_CONNMARK NET_ACT_CSUM NET_ACT_CT NET_ACT_CTINFO NET_ACT_GATE NET_ACT_IFE NET_ACT_IPT NET_ACT_MPLS NET_ACT_NAT NET_ACT_PEDIT NET_ACT_POLICE NET_ACT_SAMPLE NET_ACT_SIMP NET_ACT_SKBEDIT NET_ACT_SKBMOD NET_ACT_TUNNEL_KEY NET_ACT_VLAN NET_CLS_BASIC NET_CLS_BPF NET_CLS_FLOW NET_CLS_FLOWER NET_CLS_FW NET_CLS_MATCHALL NET_CLS_ROUTE4 NET_DEVLINK NET_DROP_MONITOR NET_DSA NET_DSA_TAG_BRCM NET_DSA_TAG_BRCM_COMMON NET_DSA_TAG_BRCM_PREPEND NET_DSA_TAG_MTK NET_DSA_TAG_QCA NET_DSA_TAG_RTL4_A NET_EMATCH_CANID NET_EMATCH_CMP NET_EMATCH_IPSET NET_EMATCH_IPT NET_EMATCH_META NET_EMATCH_NBYTE NET_EMATCH_TEXT NET_EMATCH_U32 NET_FC NET_FOU NET_FOU_IP_TUNNELS NET_IFE NET_IFE_SKBMARK NET_IFE_SKBPRIO NET_IFE_SKBTCINDEX NET_IPGRE NET_IPGRE_BROADCAST NET_IPGRE_DEMUX NET_IPIP NET_IPVTI NET_KEY NET_KEY_MIGRATE NET_L3_MASTER_DEV NET_MPLS_GSO NET_NCSI NET_NSH NET_REDIRECT NET_SCH_CAKE NET_SCH_CBS NET_SCH_CHOKE NET_SCH_CODEL NET_SCH_DRR NET_SCH_ETF NET_SCH_ETS NET_SCH_FQ NET_SCH_FQ_CODEL NET_SCH_FQ_PIE NET_SCH_GRED NET_SCH_HFSC NET_SCH_HHF NET_SCH_HTB NET_SCH_INGRESS NET_SCH_MQPRIO NET_SCH_MULTIQ NET_SCH_NETEM NET_SCH_PIE NET_SCH_PLUG NET_SCH_PRIO NET_SCH_QFQ NET_SCH_RED NET_SCH_SFB NET_SCH_SFQ NET_SCH_SKBPRIO NET_SCH_TAPRIO NET_SCH_TBF NET_SCH_TEQL NET_SOCK_MSG NET_SWITCHDEV NET_TC_SKB_EXT NET_TEAM NET_TEAM_MODE_ACTIVEBACKUP NET_TEAM_MODE_BROADCAST NET_TEAM_MODE_LOADBALANCE NET_TEAM_MODE_RANDOM NET_TEAM_MODE_ROUNDROBIN NET_UDP_TUNNEL NET_VRF NFC NFC_DIGITAL NFC_FDP NFC_HCI NFC_MRVL NFC_MRVL_USB NFC_NCI NFC_NCI_UART NFC_PN533 NFC_PN533_USB NFC_PORT100 NFC_SHDLC NFC_SIM NFC_VIRTUAL_NCI NFSD NFSD_BLOCKLAYOUT NFSD_FLEXFILELAYOUT NFSD_PNFS NFSD_SCSILAYOUT NFSD_V3_ACL NFSD_V4 NFSD_V4_2_INTER_SSC NFSD_V4_SECURITY_LABEL NFS_FSCACHE NFS_V4_1 NFS_V4_2 NFS_V4_2_READ_PLUS NFS_V4_2_SSC_HELPER NFS_V4_SECURITY_LABEL NFT_BRIDGE_META NFT_BRIDGE_REJECT NFT_COMPAT NFT_CONNLIMIT NFT_CT NFT_DUP_IPV4 NFT_DUP_IPV6 NFT_DUP_NETDEV NFT_FIB NFT_FIB_INET NFT_FIB_IPV4 NFT_FIB_IPV6 NFT_FIB_NETDEV NFT_FLOW_OFFLOAD NFT_HASH NFT_LIMIT NFT_LOG NFT_MASQ NFT_NAT NFT_NUMGEN NFT_OSF NFT_QUEUE NFT_QUOTA NFT_REDIR NFT_REJECT NFT_REJECT_INET NFT_REJECT_IPV4 NFT_REJECT_IPV6 NFT_REJECT_NETDEV NFT_SOCKET NFT_SYNPROXY NFT_TPROXY NFT_TUNNEL NFT_XFRM NF_CONNTRACK_AMANDA NF_CONNTRACK_BRIDGE NF_CONNTRACK_BROADCAST NF_CONNTRACK_EVENTS NF_CONNTRACK_H323 NF_CONNTRACK_LABELS NF_CONNTRACK_MARK NF_CONNTRACK_NETBIOS_NS NF_CONNTRACK_PPTP NF_CONNTRACK_SANE NF_CONNTRACK_SNMP NF_CONNTRACK_TFTP NF_CONNTRACK_TIMEOUT NF_CONNTRACK_TIMESTAMP NF_CONNTRACK_ZONES NF_CT_NETLINK_HELPER NF_CT_NETLINK_TIMEOUT NF_CT_PROTO_DCCP NF_CT_PROTO_GRE NF_CT_PROTO_SCTP NF_CT_PROTO_UDPLITE NF_DUP_IPV4 NF_DUP_IPV6 NF_DUP_NETDEV NF_FLOW_TABLE NF_FLOW_TABLE_INET NF_NAT_AMANDA NF_NAT_H323 NF_NAT_PPTP NF_NAT_REDIRECT NF_NAT_SNMP_BASIC NF_NAT_TFTP NF_SOCKET_IPV4 NF_SOCKET_IPV6 NF_TABLES NF_TABLES_ARP NF_TABLES_BRIDGE NF_TABLES_INET NF_TABLES_IPV4 NF_TABLES_IPV6 NF_TABLES_NETDEV NF_TPROXY_IPV4 NF_TPROXY_IPV6 NILFS2_FS NINTENDO_FF NLMON NLS_CODEPAGE_1250 NLS_CODEPAGE_1251 NLS_CODEPAGE_737 NLS_CODEPAGE_775 NLS_CODEPAGE_850 NLS_CODEPAGE_852 NLS_CODEPAGE_855 PARTITION_ADVANCED PSAMPLE RC_CORE RC_DEVICES RFKILL SPI USB_GADGET USB_MUSB_HDRC VIDEO_DEV WAN WATCH_QUEUE WIRELESS WLAN WWAN X25 X86_X32_ABI]
disabling configs for [atomic_sleep memleak ubsan bug_or_warning kasan locking], they are not needed
testing current HEAD 0bc96de781b4da716c8dbd248af4b26d8d8341f5
testing commit 0bc96de781b4da716c8dbd248af4b26d8d8341f5 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: b514a16a3eeb668c66aad568b0044657aec31269c4095ea9e720a7b741b5f484
all runs: crashed: INFO: task hung in lmLogClose
representative crash: INFO: task hung in lmLogClose, types: [HANG]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 2h5m27.971225688s (build: 42m22.509465116s, test: 1h19m40.306067815s)
crash still not fixed or there were kernel test errors
commit msg: Linux 6.1.148
crash: INFO: task hung in lmLogClose
INFO: task syz-executor:3351 blocked for more than 143 seconds.
Not tainted 6.1.148-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:11216 pid:3351 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x574/0x880 kernel/sched/core.c:6561
schedule+0x50/0xb0 kernel/sched/core.c:6637
schedule_preempt_disabled+0x2e/0x40 kernel/sched/core.c:6696
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x44c/0x9b0 kernel/locking/mutex.c:747
lmLogClose+0x4b/0x200 fs/jfs/jfs_logmgr.c:1444
jfs_umount+0x122/0x190 fs/jfs/jfs_umount.c:116
jfs_put_super+0x61/0x100 fs/jfs/super.c:194
generic_shutdown_super+0x91/0x1b0 fs/super.c:501
kill_block_super+0x2e/0x50 fs/super.c:1470
deactivate_locked_super+0x48/0xb0 fs/super.c:332
cleanup_mnt+0x12a/0x170 fs/namespace.c:1182
task_work_run+0xe3/0x110 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xc5/0xe0 kernel/entry/common.c:177
exit_to_user_mode_prepare+0x6c/0xc0 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x16/0x30 kernel/entry/common.c:303
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f49b58b7057
RSP: 002b:00007ffec045ecb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f49b59318f4 RCX: 00007f49b58b7057
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffec045ed70
RBP: 00007ffec045ed70 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffec045fdf0
R13: 00007f49b59318f4 R14: 00007ffec045fe30 R15: 0000000000000001
INFO: task syz-executor:3353 blocked for more than 144 seconds.
Not tainted 6.1.148-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:11696 pid:3353 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x574/0x880 kernel/sched/core.c:6561
schedule+0x50/0xb0 kernel/sched/core.c:6637
schedule_preempt_disabled+0x2e/0x40 kernel/sched/core.c:6696
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x44c/0x9b0 kernel/locking/mutex.c:747
lmLogClose+0x4b/0x200 fs/jfs/jfs_logmgr.c:1444
jfs_umount+0x122/0x190 fs/jfs/jfs_umount.c:116
jfs_put_super+0x61/0x100 fs/jfs/super.c:194
generic_shutdown_super+0x91/0x1b0 fs/super.c:501
kill_block_super+0x2e/0x50 fs/super.c:1470
deactivate_locked_super+0x48/0xb0 fs/super.c:332
cleanup_mnt+0x12a/0x170 fs/namespace.c:1182
task_work_run+0xe3/0x110 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xc5/0xe0 kernel/entry/common.c:177
exit_to_user_mode_prepare+0x6c/0xc0 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x16/0x30 kernel/entry/common.c:303
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7e62847057
RSP: 002b:00007ffc097d34f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f7e628c18f4 RCX: 00007f7e62847057
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc097d35b0
RBP: 00007ffc097d35b0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc097d4630
R13: 00007f7e628c18f4 R14: 00007ffc097d4670 R15: 0000000000000001
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff839a7618 (rcu_tasks.tasks_gp_mutex){....}-{3:3}, at: rcu_tasks_one_gp kernel/rcu/tasks.h:517 [inline]
#0: ffffffff839a7618 (rcu_tasks.tasks_gp_mutex){....}-{3:3}, at: rcu_tasks_kthread+0x97/0x4c0 kernel/rcu/tasks.h:562
1 lock held by khungtaskd/27:
#0: ffffffff839a73d8 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff839a73d8 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff839a73d8 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x2a/0xf0 kernel/locking/lockdep.c:6513
2 locks held by getty/1328:
#0: ffff8881062e6898 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x50 drivers/tty/tty_ldisc.c:244
#1: ffffc900028b72f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x231/0xba0 drivers/tty/n_tty.c:2198
2 locks held by syz-executor/3351:
#0: ffff88811b43a0e0 (&type->s_umount_key#43){....}-{3:3}, at: deactivate_super+0x76/0x90 fs/super.c:362
#1: ffffffff83a61c78 (jfs_log_mutex){....}-{3:3}, at: lmLogClose+0x4b/0x200 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/3353:
#0: ffff888123ca30e0 (&type->s_umount_key#43){....}-{3:3}, at: deactivate_super+0x76/0x90 fs/super.c:362
#1: ffffffff83a61c78 (jfs_log_mutex){....}-{3:3}, at: lmLogClose+0x4b/0x200 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/3365:
#0: ffff88811b43f0e0 (&type->s_umount_key#43){....}-{3:3}, at: deactivate_super+0x76/0x90 fs/super.c:362
#1: ffffffff83a61c78 (jfs_log_mutex){....}-{3:3}, at: lmLogClose+0x4b/0x200 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/6096:
#0: ffff8881244e80e0 (&type->s_umount_key#43){....}-{3:3}, at: deactivate_super+0x76/0x90 fs/super.c:362
#1: ffffffff83a61c78 (jfs_log_mutex){....}-{3:3}, at: lmLogClose+0x4b/0x200 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/6169:
#0: ffff888122a690e0 (&type->s_umount_key#43){....}-{3:3}, at: deactivate_super+0x76/0x90 fs/super.c:362
#1: ffffffff83a61c78 (jfs_log_mutex){....}-{3:3}, at: lmLogClose+0x4b/0x200 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/6173:
#0: ffff8881251270e0 (&type->s_umount_key#43){....}-{3:3}, at: deactivate_super+0x76/0x90 fs/super.c:362
#1: ffffffff83a61c78 (jfs_log_mutex){....}-{3:3}, at: lmLogClose+0x4b/0x200 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/6174:
#0: ffff888123c510e0 (&type->s_umount_key#43){....}-{3:3}, at: deactivate_super+0x76/0x90 fs/super.c:362
#1: ffffffff83a61c78 (jfs_log_mutex){....}-{3:3}, at: lmLogClose+0x4b/0x200 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/6175:
#0: ffff888123ca20e0 (&type->s_umount_key#43){....}-{3:3}, at: deactivate_super+0x76/0x90 fs/super.c:362
#1: ffffffff83a61c78 (jfs_log_mutex){....}-{3:3}, at: lmLogClose+0x4b/0x200 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/8007:
#0: ffff888121fc10e0 (&type->s_umount_key#43){....}-{3:3}, at: deactivate_super+0x76/0x90 fs/super.c:362
#1: ffffffff83a61c78 (jfs_log_mutex){....}-{3:3}, at: lmLogClose+0x4b/0x200 fs/jfs/jfs_logmgr.c:1444
1 lock held by syz-executor/8138:
#0: ffff88812612c0e0 (&type->s_umount_key#43){....}-{3:3}, at: deactivate_super+0x76/0x90 fs/super.c:362
2 locks held by udevd/9950:
1 lock held by udevd/9957:
2 locks held by syz.8.1037/12660:
5 locks held by syz.1.1038/12662:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 6.1.148-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
dump_stack_lvl+0xe7/0x17e lib/dump_stack.c:106
nmi_cpu_backtrace+0x220/0x240 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x108/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0x82e/0x870 kernel/hung_task.c:377
kthread+0xfc/0x130 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1161 Comm: syslogd Not tainted 6.1.148-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:vfs_read+0x155/0x420 fs/read_write.c:469
Code: 4c 8b 60 10 4d 85 e4 74 1c e8 27 93 df ff 48 89 df 4c 89 fe 4c 89 ea 4c 89 f1 41 ff d4 48 89 c6 e9 e0 00 00 00 48 83 78 20 00 <74> 4e 8b 2b 65 48 8b 3d 9f e5 b5 7e e8 0a 61 51 00 48 89 5c 24 28
RSP: 0018:ffffc900003e7e40 EFLAGS: 00000282
RAX: ffffffff8319a228 RBX: ffff888101264400 RCX: 0000000000000000
RDX: ffff8881062d51c0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 00000000000000ff R14: 0000000000000000 R15: 000055ff83d2a950
FS: 00007f1e3c8cac80(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff17f3b2000 CR3: 00000001062a2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ksys_read+0xb1/0x160 fs/read_write.c:613
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1e3ca1a407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007fff19918060 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f1e3c8cac80 RCX: 00007f1e3ca1a407
RDX: 00000000000000ff RSI: 000055ff83d2a950 RDI: 0000000000000000
RBP: 000055ff83d2a910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000055ff83d2a99a
R13: 0000000000000000 R14: 000055ff83d2a950 R15: 000055ff6f48dd98