ci2 starts bisection 2025-09-02 22:15:21.308301042 +0000 UTC m=+33045.719896898 bisecting fixing commit since 2f693b60754599cbe248b385e7bf939c72f3e30e building syzkaller on 3cda49cfaa8556b73277ccd7e75952f0f2de2d74 ensuring issue is reproducible on original commit 2f693b60754599cbe248b385e7bf939c72f3e30e testing commit 2f693b60754599cbe248b385e7bf939c72f3e30e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3b2307fd9cd7deeba8222a18b823492a8de3573bf6f38a312a598644b95272cb run #0: crashed: INFO: task hung in hold_metapage run #1: crashed: INFO: task hung in hold_metapage run #2: crashed: INFO: task hung in hold_metapage run #3: crashed: INFO: task hung in hold_metapage run #4: crashed: INFO: task hung in hold_metapage run #5: crashed: INFO: task hung in hold_metapage run #6: crashed: INFO: task hung in hold_metapage run #7: crashed: INFO: task hung in release_metapage run #8: crashed: INFO: task hung in hold_metapage run #9: crashed: INFO: task hung in hold_metapage run #10: crashed: INFO: task hung in release_metapage run #11: crashed: INFO: task hung in hold_metapage run #12: crashed: INFO: task hung in release_metapage run #13: crashed: INFO: task hung in release_metapage run #14: crashed: INFO: task hung in release_metapage run #15: crashed: INFO: task hung in release_metapage run #16: crashed: INFO: task hung in release_metapage run #17: crashed: INFO: task hung in release_metapage run #18: crashed: INFO: task hung in release_metapage run #19: crashed: INFO: task hung in hold_metapage representative crash: INFO: task hung in hold_metapage, types: [HANG] check whether we can drop unnecessary instrumentation disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 2f693b60754599cbe248b385e7bf939c72f3e30e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ef2db545262071f7c98bd1261fc9ff4817dfe138623789d734dee318620934bf run #0: crashed: INFO: task hung in release_metapage run #1: crashed: INFO: task hung in release_metapage run #2: crashed: INFO: task hung in release_metapage run #3: crashed: INFO: task hung in release_metapage run #4: crashed: INFO: task hung in release_metapage run #5: crashed: INFO: task hung in hold_metapage run #6: crashed: INFO: task hung in hold_metapage run #7: crashed: INFO: task hung in hold_metapage run #8: crashed: INFO: task hung in hold_metapage run #9: crashed: INFO: task hung in hold_metapage representative crash: INFO: task hung in release_metapage, types: [HANG] the bug reproduces without the instrumentation disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed kconfig minimization: base=3707 full=7424 leaves diff=2100 split chunks (needed=false): <2100> split chunk #0 of len 2100 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 2f693b60754599cbe248b385e7bf939c72f3e30e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3bf14c79fa20295043f5a58b6dba36d8898e6fc409b716ed579bfe210e83a0d4 run #0: crashed: INFO: task hung in hold_metapage run #1: crashed: INFO: task hung in release_metapage run #2: crashed: INFO: task hung in release_metapage run #3: crashed: INFO: task hung in hold_metapage run #4: crashed: INFO: task hung in hold_metapage run #5: crashed: INFO: task hung in hold_metapage run #6: crashed: INFO: task hung in hold_metapage run #7: crashed: INFO: task hung in hold_metapage run #8: crashed: INFO: task hung in hold_metapage run #9: crashed: INFO: task hung in hold_metapage representative crash: INFO: task hung in hold_metapage, types: [HANG] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 2f693b60754599cbe248b385e7bf939c72f3e30e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f4f66ef8b1c14087e2ba244d2da48c36f6e22ad93224c2b8b0d79880eae97046 all runs: crashed: INFO: task hung in release_metapage representative crash: INFO: task hung in release_metapage, 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 2f693b60754599cbe248b385e7bf939c72f3e30e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 94156636006319e6258ab8c727503982c34f289019a2263c122fa1cd32df0303 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 2f693b60754599cbe248b385e7bf939c72f3e30e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f84e4463305d7789d51bfbac6a84773f7c1810395401afcf965fc2c34f6f74c9 run #0: crashed: INFO: task hung in release_metapage run #1: crashed: INFO: task hung in release_metapage run #2: crashed: INFO: task hung in hold_metapage run #3: crashed: INFO: task hung in release_metapage run #4: crashed: INFO: task hung in release_metapage run #5: crashed: INFO: task hung in hold_metapage run #6: crashed: INFO: task hung in release_metapage run #7: crashed: INFO: task hung in release_metapage run #8: crashed: INFO: task hung in release_metapage run #9: crashed: INFO: task hung in release_metapage representative crash: INFO: task hung in release_metapage, 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 2f693b60754599cbe248b385e7bf939c72f3e30e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e7a590c57f7d127718eab920c8e6f382bcf7ed024a8ede6ccf19e0afc06afe88 run #0: crashed: INFO: task hung in release_metapage run #1: crashed: INFO: task hung in hold_metapage run #2: crashed: INFO: task hung in hold_metapage run #3: crashed: INFO: task hung in hold_metapage run #4: crashed: INFO: task hung in release_metapage run #5: crashed: INFO: task hung in release_metapage run #6: crashed: INFO: task hung in hold_metapage run #7: crashed: INFO: task hung in hold_metapage run #8: crashed: INFO: task hung in hold_metapage run #9: crashed: INFO: task hung in hold_metapage representative crash: INFO: task hung in release_metapage, types: [HANG] the chunk can be dropped minimized to 420 configs; suspects: [AX25 BRIDGE BRIDGE_NETFILTER CAN CFG80211 CHECKPOINT_RESTORE DVB_CORE FB FSCACHE HAMRADIO HSR INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_USER_ACCESS INPUT_JOYSTICK INPUT_MOUSE IP6_NF_RAW IPV6_MULTIPLE_TABLES IP_NF_RAW IP_SET 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 IR_IGORPLUGUSB IR_IGUANA IR_IMON IR_IMON_RAW IR_MCEUSB IR_REDRAT3 IR_STREAMZAP IR_TOY IR_TTUSBIR ISA_BUS 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_INTEL KVM_MMIO KVM_VFIO KVM_XEN KVM_XFER_TO_GUEST_WORK L2TP L2TP_ETH L2TP_IP L2TP_V3 LAPB LAPBETHER LDM_PARTITION LEDS_TRIGGER_AUDIO LEGACY_PTYS 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 MEDIA_TUNER_XC2028 MEDIA_TUNER_XC5000 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 MITIGATION_TSA 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_BLK 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 NETFS_SUPPORT 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_CGROUP 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_EGRESS 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_COUNTER 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_OBJREF 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_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_FLOW_TABLE_IPV4 NF_FLOW_TABLE_IPV6 NF_NAT_AMANDA NF_NAT_H323 NF_NAT_PPTP NF_TABLES NF_TABLES_BRIDGE NF_TABLES_INET NF_TABLES_IPV4 NF_TABLES_IPV6 NF_TABLES_NETDEV PARTITION_ADVANCED PSAMPLE RC_CORE RC_DEVICES RFKILL SPI USB_GADGET USB_MUSB_HDRC VIDEO_DEV VIDEO_V4L2 WAN WATCH_QUEUE WIRELESS WLAN WWAN X25] disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing current HEAD 01879f56bddeda429ecc7cd67bafdb291fbd7775 testing commit 01879f56bddeda429ecc7cd67bafdb291fbd7775 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: bfc118afe995fbe6366299b7e9f423e09a59a3225c7a4c5539b213e9a874b365 run #0: crashed: INFO: task hung in release_metapage run #1: crashed: INFO: task hung in hold_metapage run #2: crashed: INFO: task hung in release_metapage run #3: crashed: INFO: task hung in release_metapage run #4: crashed: INFO: task hung in hold_metapage run #5: crashed: INFO: task hung in hold_metapage run #6: crashed: INFO: task hung in hold_metapage run #7: crashed: INFO: task hung in hold_metapage run #8: crashed: INFO: task hung in hold_metapage run #9: crashed: INFO: task hung in hold_metapage representative crash: INFO: task hung in release_metapage, types: [HANG] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 2h3m31.259362655s (build: 28m58.313082957s, test: 1h29m57.866215837s) crash still not fixed or there were kernel test errors commit msg: Linux 5.15.190 crash: INFO: task hung in release_metapage INFO: task syz.2.16:4556 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.16 state:D stack:13240 pid: 4556 ppid: 3775 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x2c8/0x7d0 kernel/sched/core.c:6395 schedule+0x53/0x90 kernel/sched/core.c:6478 io_schedule+0x3d/0x60 kernel/sched/core.c:8503 wait_on_page_bit_common+0x1ee/0x8c0 mm/filemap.c:1356 lock_page include/linux/pagemap.h:625 [inline] release_metapage+0x29e/0x430 fs/jfs/jfs_metapage.c:736 discard_metapage fs/jfs/jfs_metapage.h:88 [inline] __get_metapage+0x6d7/0x920 fs/jfs/jfs_metapage.c:645 dtSearch+0xbd9/0xf80 fs/jfs/jfs_dtree.c:624 jfs_lookup+0xbf/0x180 fs/jfs/namei.c:1459 __lookup_slow+0x146/0x280 fs/namei.c:1663 lookup_slow fs/namei.c:1680 [inline] walk_component+0x1f2/0x2a0 fs/namei.c:1976 lookup_last fs/namei.c:2431 [inline] path_lookupat+0xc6/0x320 fs/namei.c:2455 filename_lookup+0xff/0x2a0 fs/namei.c:2484 user_path_at_empty+0x42/0x60 fs/namei.c:2883 user_path_at include/linux/namei.h:57 [inline] __do_sys_chdir fs/open.c:490 [inline] __se_sys_chdir fs/open.c:484 [inline] __x64_sys_chdir+0x4b/0x140 fs/open.c:484 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x33/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fe8a9f20929 RSP: 002b:00007fe8a9991038 EFLAGS: 00000246 ORIG_RAX: 0000000000000050 RAX: ffffffffffffffda RBX: 00007fe8aa147fa0 RCX: 00007fe8a9f20929 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000a40 RBP: 00007fe8a9fa2b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fe8aa147fa0 R15: 00007ffc37881b78 Showing all locks held in the system: 1 lock held by khungtaskd/25: #0: ffffffff837a1100 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x15/0xf2 kernel/locking/lockdep.c:6472 2 locks held by getty/1334: #0: ffff88810b452098 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x60 drivers/tty/tty_ldisc.c:252 #1: ffffc900029272e8 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x899/0xa20 drivers/tty/n_tty.c:2158 1 lock held by syz.2.16/4556: #0: ffff8881185f8e20 (&type->i_mutex_dir_key#8){....}-{3:3}, at: inode_lock_shared include/linux/fs.h:797 [inline] #0: ffff8881185f8e20 (&type->i_mutex_dir_key#8){....}-{3:3}, at: lookup_slow fs/namei.c:1679 [inline] #0: ffff8881185f8e20 (&type->i_mutex_dir_key#8){....}-{3:3}, at: walk_component+0x1e3/0x2a0 fs/namei.c:1976 1 lock held by syz.3.17/5069: #0: ffff888118673940 (&type->i_mutex_dir_key#8){....}-{3:3}, at: inode_lock_shared include/linux/fs.h:797 [inline] #0: ffff888118673940 (&type->i_mutex_dir_key#8){....}-{3:3}, at: lookup_slow fs/namei.c:1679 [inline] #0: ffff888118673940 (&type->i_mutex_dir_key#8){....}-{3:3}, at: walk_component+0x1e3/0x2a0 fs/namei.c:1976 1 lock held by syz.4.18/5462: #0: ffff888118676d00 (&type->i_mutex_dir_key#8){....}-{3:3}, at: inode_lock_shared include/linux/fs.h:797 [inline] #0: ffff888118676d00 (&type->i_mutex_dir_key#8){....}-{3:3}, at: lookup_slow fs/namei.c:1679 [inline] #0: ffff888118676d00 (&type->i_mutex_dir_key#8){....}-{3:3}, at: walk_component+0x1e3/0x2a0 fs/namei.c:1976 1 lock held by syz.5.19/5851: #0: ffff88811867a800 (&type->i_mutex_dir_key#8){....}-{3:3}, at: inode_lock_shared include/linux/fs.h:797 [inline] #0: ffff88811867a800 (&type->i_mutex_dir_key#8){....}-{3:3}, at: lookup_slow fs/namei.c:1679 [inline] #0: ffff88811867a800 (&type->i_mutex_dir_key#8){....}-{3:3}, at: walk_component+0x1e3/0x2a0 fs/namei.c:1976 1 lock held by syz.6.20/6247: #0: ffff88811867d320 (&type->i_mutex_dir_key#8){....}-{3:3}, at: inode_lock_shared include/linux/fs.h:797 [inline] #0: ffff88811867d320 (&type->i_mutex_dir_key#8){....}-{3:3}, at: lookup_slow fs/namei.c:1679 [inline] #0: ffff88811867d320 (&type->i_mutex_dir_key#8){....}-{3:3}, at: walk_component+0x1e3/0x2a0 fs/namei.c:1976 1 lock held by syz.7.21/6636: #0: ffff8881185fca80 (&type->i_mutex_dir_key#8){....}-{3:3}, at: inode_lock_shared include/linux/fs.h:797 [inline] #0: ffff8881185fca80 (&type->i_mutex_dir_key#8){....}-{3:3}, at: lookup_slow fs/namei.c:1679 [inline] #0: ffff8881185fca80 (&type->i_mutex_dir_key#8){....}-{3:3}, at: walk_component+0x1e3/0x2a0 fs/namei.c:1976 1 lock held by syz.8.22/7025: #0: ffff888121490e20 (&type->i_mutex_dir_key#8){....}-{3:3}, at: inode_lock_shared include/linux/fs.h:797 [inline] #0: ffff888121490e20 (&type->i_mutex_dir_key#8){....}-{3:3}, at: lookup_slow fs/namei.c:1679 [inline] #0: ffff888121490e20 (&type->i_mutex_dir_key#8){....}-{3:3}, at: walk_component+0x1e3/0x2a0 fs/namei.c:1976 1 lock held by syz.9.23/7418: #0: ffff8881214930a0 (&type->i_mutex_dir_key#8){....}-{3:3}, at: inode_lock_shared include/linux/fs.h:797 [inline] #0: ffff8881214930a0 (&type->i_mutex_dir_key#8){....}-{3:3}, at: lookup_slow fs/namei.c:1679 [inline] #0: ffff8881214930a0 (&type->i_mutex_dir_key#8){....}-{3:3}, at: walk_component+0x1e3/0x2a0 fs/namei.c:1976 1 lock held by syz.0.24/7804: #0: ffff8881214941e0 (&type->i_mutex_dir_key#8){....}-{3:3}, at: inode_lock_shared include/linux/fs.h:797 [inline] #0: ffff8881214941e0 (&type->i_mutex_dir_key#8){....}-{3:3}, at: lookup_slow fs/namei.c:1679 [inline] #0: ffff8881214941e0 (&type->i_mutex_dir_key#8){....}-{3:3}, at: walk_component+0x1e3/0x2a0 fs/namei.c:1976 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 25 Comm: khungtaskd Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x8e/0xdd lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x46/0xde lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x11b/0x150 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0x78d/0x7d0 kernel/hung_task.c:369 kthread+0x13a/0x160 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] NMI backtrace for cpu 0 skipped: idling at default_idle+0xb/0x10 arch/x86/kernel/process.c:729