ci2 starts bisection 2025-10-26 00:25:41.063299218 +0000 UTC m=+282799.880677209
bisecting fixing commit since d96eb99e2f0e32b6d29e7f12a790b08c08825503
building syzkaller on 7117feecc9626dc60b06fb3e91c0f7632d99d30b
ensuring issue is reproducible on original commit d96eb99e2f0e32b6d29e7f12a790b08c08825503
testing commit d96eb99e2f0e32b6d29e7f12a790b08c08825503 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 685ecb3168b9737961da9420ac92063b5243edad2e42636298d975b6ef5b7a8b
run #0: crashed: VFS: Busy inodes after unmount (use-after-free)
run #1: crashed: INFO: task hung in lock_metapage
run #2: crashed: INFO: task hung in lock_metapage
run #3: crashed: INFO: task hung in lock_metapage
run #4: crashed: INFO: task hung in lock_metapage
run #5: crashed: INFO: task hung in lock_metapage
run #6: crashed: INFO: task hung in lock_metapage
run #7: crashed: INFO: task hung in lock_metapage
run #8: crashed: INFO: task hung in lock_metapage
run #9: crashed: INFO: task hung in lock_metapage
run #10: crashed: INFO: task hung in lock_metapage
run #11: crashed: INFO: task hung in lock_metapage
run #12: crashed: INFO: task hung in lock_metapage
run #13: crashed: INFO: task hung in lock_metapage
run #14: crashed: INFO: task hung in lock_metapage
run #15: crashed: INFO: task hung in lock_metapage
run #16: crashed: INFO: task hung in lock_metapage
run #17: crashed: INFO: task hung in lock_metapage
run #18: crashed: INFO: task hung in lock_metapage
run #19: crashed: INFO: task hung in lock_metapage
representative crash: INFO: task hung in lock_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 d96eb99e2f0e32b6d29e7f12a790b08c08825503 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 952714a5e015ddfb50019afdbcaa2cd8b92e710e314a7ef73498a923c9804e57
run #0: crashed: VFS: Busy inodes after unmount (use-after-free)
run #1: crashed: INFO: task hung in __get_metapage
run #2: crashed: INFO: task hung in __get_metapage
run #3: crashed: INFO: task hung in __get_metapage
run #4: crashed: INFO: task hung in __get_metapage
run #5: crashed: INFO: task hung in __get_metapage
run #6: crashed: INFO: task hung in __get_metapage
run #7: crashed: INFO: task hung in __get_metapage
run #8: crashed: INFO: task hung in __get_metapage
run #9: crashed: INFO: task hung in __get_metapage
representative crash: INFO: task hung in __get_metapage, 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=3913 full=7800 leaves diff=2160
split chunks (needed=false): <2160>
split chunk #0 of len 2160 into 5 parts
testing without sub-chunk 1/5
disabling configs for [atomic_sleep memleak ubsan bug_or_warning kasan locking], they are not needed
testing commit d96eb99e2f0e32b6d29e7f12a790b08c08825503 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 4347c633a3e6059abbde7859b744f5c70d1c569a6e0ebb34656a140252ef2c14
run #0: crashed: VFS: Busy inodes after unmount (use-after-free)
run #1: crashed: VFS: Busy inodes after unmount (use-after-free)
run #2: crashed: VFS: Busy inodes after unmount (use-after-free)
run #3: crashed: INFO: task hung in __get_metapage
run #4: crashed: INFO: task hung in __get_metapage
run #5: crashed: INFO: task hung in __get_metapage
run #6: crashed: INFO: task hung in __get_metapage
run #7: crashed: INFO: task hung in __get_metapage
run #8: crashed: INFO: task hung in __get_metapage
run #9: crashed: INFO: task hung in __get_metapage
representative crash: INFO: task hung in __get_metapage, types: [HANG DoS]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed
testing commit d96eb99e2f0e32b6d29e7f12a790b08c08825503 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: f715b84832a4c7db33adda715525b006ec6a91e9b4187e69c7aa902891d44ff8
all runs: crashed: INFO: task hung in __get_metapage
representative crash: INFO: task hung in __get_metapage, types: [HANG]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed
testing commit d96eb99e2f0e32b6d29e7f12a790b08c08825503 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 99ef0af4160bdc91a42e0c2c1ff0d110bd7f9cf1092ba11f2a58a371d7c72413
all runs: OK
false negative chance: 0.000
testing without sub-chunk 4/5
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit d96eb99e2f0e32b6d29e7f12a790b08c08825503 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 05df7c1ba6c862fbb039046f891173404561dbf18e60a1edd46b362f962b6d96
run #0: crashed: VFS: Busy inodes after unmount (use-after-free)
run #1: crashed: INFO: task hung in __get_metapage
run #2: crashed: INFO: task hung in __get_metapage
run #3: crashed: INFO: task hung in __get_metapage
run #4: crashed: INFO: task hung in __get_metapage
run #5: crashed: INFO: task hung in __get_metapage
run #6: crashed: INFO: task hung in __get_metapage
run #7: crashed: INFO: task hung in __get_metapage
run #8: crashed: INFO: task hung in __get_metapage
run #9: crashed: INFO: task hung in __get_metapage
representative crash: INFO: task hung in __get_metapage, types: [HANG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed
testing commit d96eb99e2f0e32b6d29e7f12a790b08c08825503 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 9881bdaa17ed47e625705738d46b722266d1d0896fda625c95b06820b3f5fe5f
run #0: crashed: VFS: Busy inodes after unmount (use-after-free)
run #1: crashed: VFS: Busy inodes after unmount (use-after-free)
run #2: crashed: INFO: task hung in __get_metapage
run #3: crashed: INFO: task hung in __get_metapage
run #4: crashed: INFO: task hung in __get_metapage
run #5: crashed: INFO: task hung in __get_metapage
run #6: crashed: INFO: task hung in __get_metapage
run #7: crashed: INFO: task hung in __get_metapage
run #8: crashed: INFO: task hung in __get_metapage
run #9: crashed: INFO: task hung in __get_metapage
representative crash: INFO: task hung in __get_metapage, types: [HANG]
the chunk can be dropped
minimized to 432 configs; suspects: [AX25 BRIDGE BRIDGE_NETFILTER CAN CFG80211 CHECKPOINT_RESTORE DVB_CORE FB_CORE FSCACHE HAMRADIO HSR INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_USER_ACCESS INPUT_JOYSTICK INPUT_MOUSE IP6_NF_RAW IPV6_MULTIPLE_TABLES IP_NF_MATCH_RPFILTER IP_NF_MATCH_TTL IP_NF_RAW IP_NF_SECURITY IP_NF_TARGET_ECN IP_NF_TARGET_NETMAP IP_NF_TARGET_REDIRECT IP_NF_TARGET_SYNPROXY IP_NF_TARGET_TTL IP_ROUTE_CLASSID 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 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_GENERIC_HARDWARE_ENABLING KVM_MMIO KVM_PROVE_MMU 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 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 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_BTT ND_CLAIM ND_PFN NETDEVSIM NETFILTER_ADVANCED NETFILTER_BPF_LINK NETFILTER_FAMILY_ARP NETFILTER_FAMILY_BRIDGE NETFILTER_NETLINK_ACCT NETFILTER_NETLINK_GLUE_CT NETFILTER_NETLINK_OSF NETFILTER_NETLINK_QUEUE NETFILTER_SYNPROXY NETFILTER_XTABLES_COMPAT 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_MQPRIO_LIB 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_OVS 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_FLOW_TABLE 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 WAN WATCH_QUEUE WIRELESS WLAN WWAN X25]
disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed
testing current HEAD 4a243110dc884d8e1fe69eecbc2daef10d8e75d7
testing commit 4a243110dc884d8e1fe69eecbc2daef10d8e75d7 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 8e5c09e596a26b986886af1274da603aea7436123637c155298183cd73c4c495
run #0: crashed: VFS: Busy inodes after unmount (use-after-free)
run #1: crashed: VFS: Busy inodes after unmount (use-after-free)
run #2: crashed: INFO: task hung in __get_metapage
run #3: crashed: INFO: task hung in __get_metapage
run #4: crashed: INFO: task hung in __get_metapage
run #5: crashed: INFO: task hung in __get_metapage
run #6: crashed: INFO: task hung in __get_metapage
run #7: crashed: INFO: task hung in __get_metapage
run #8: crashed: INFO: task hung in __get_metapage
run #9: crashed: INFO: task hung in __get_metapage
representative crash: INFO: task hung in __get_metapage, types: [HANG]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 1h47m41.425265713s (build: 43m4.195822734s, test: 59m59.704333177s)
crash still not fixed or there were kernel test errors
commit msg: Linux 6.6.114
crash: INFO: task hung in __get_metapage
INFO: task jfsCommit:78 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jfsCommit state:D stack:14040 pid:78 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x6a2/0x990 kernel/sched/core.c:6699
schedule+0x54/0xc0 kernel/sched/core.c:6773
io_schedule+0x3e/0x60 kernel/sched/core.c:9022
__lock_metapage fs/jfs/jfs_metapage.c:50 [inline]
lock_metapage fs/jfs/jfs_metapage.c:64 [inline]
__get_metapage+0x2fd/0x880 fs/jfs/jfs_metapage.c:639
diIAGRead+0x3d/0x60 fs/jfs/jfs_imap.c:2672
diFree+0x406/0xe20 fs/jfs/jfs_imap.c:959
jfs_evict_inode+0x171/0x1d0 fs/jfs/inode.c:156
evict+0x1e3/0x470 fs/inode.c:705
txLazyCommit fs/jfs/jfs_txnmgr.c:2664 [inline]
jfs_lazycommit+0x197/0x4a0 fs/jfs/jfs_txnmgr.c:2732
kthread+0x114/0x140 kernel/kthread.c:388
ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
INFO: task jfsCommit:79 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jfsCommit state:D stack:13384 pid:79 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x6a2/0x990 kernel/sched/core.c:6699
schedule+0x54/0xc0 kernel/sched/core.c:6773
io_schedule+0x3e/0x60 kernel/sched/core.c:9022
__lock_metapage fs/jfs/jfs_metapage.c:50 [inline]
lock_metapage fs/jfs/jfs_metapage.c:64 [inline]
__get_metapage+0x2fd/0x880 fs/jfs/jfs_metapage.c:639
diIAGRead+0x3d/0x60 fs/jfs/jfs_imap.c:2672
diFree+0x406/0xe20 fs/jfs/jfs_imap.c:959
jfs_evict_inode+0x171/0x1d0 fs/jfs/inode.c:156
evict+0x1e3/0x470 fs/inode.c:705
txLazyCommit fs/jfs/jfs_txnmgr.c:2664 [inline]
jfs_lazycommit+0x197/0x4a0 fs/jfs/jfs_txnmgr.c:2732
kthread+0x114/0x140 kernel/kthread.c:388
ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
Showing all locks held in the system:
1 lock held by khungtaskd/28:
#0: ffffffff839a9fb8 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
#0: ffffffff839a9fb8 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
#0: ffffffff839a9fb8 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x2e/0x100 kernel/locking/lockdep.c:6633
2 locks held by jfsCommit/78:
#0: ffff88810a3b0920 (&(imap->im_aglock[index])){....}-{3:3}, at: diFree+0xd2/0xe20 fs/jfs/jfs_imap.c:889
#1: ffff88812351e978 (&jfs_ip->rdwrlock/1){....}-{3:3}, at: diFree+0xee/0xe20 fs/jfs/jfs_imap.c:894
2 locks held by jfsCommit/79:
#0: ffff888120828920 (&(imap->im_aglock[index])){....}-{3:3}, at: diFree+0xd2/0xe20 fs/jfs/jfs_imap.c:889
#1: ffff88812351a3f8 (&jfs_ip->rdwrlock/1){....}-{3:3}, at: diFree+0xee/0xe20 fs/jfs/jfs_imap.c:894
2 locks held by getty/1910:
#0: ffff88810eecc0a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x50 drivers/tty/tty_ldisc.c:243
#1: ffffc90003b0b2f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x23b/0xba0 drivers/tty/n_tty.c:2217
2 locks held by syz-executor/4269:
#0: ffff8881092460e0 (&type->s_umount_key#45){....}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8881092460e0 (&type->s_umount_key#45){....}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8881092460e0 (&type->s_umount_key#45){....}-{3:3}, at: deactivate_super+0x7a/0x90 fs/super.c:513
#1: ffffffff83a65da8 (jfs_log_mutex){....}-{3:3}, at: lmLogClose+0x4f/0x200 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/4274:
#0: ffff8881092410e0 (&type->s_umount_key#45){....}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8881092410e0 (&type->s_umount_key#45){....}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8881092410e0 (&type->s_umount_key#45){....}-{3:3}, at: deactivate_super+0x7a/0x90 fs/super.c:513
#1: ffffffff83a65da8 (jfs_log_mutex){....}-{3:3}, at: lmLogClose+0x4f/0x200 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/4275:
#0: ffff888101f9e0e0 (&type->s_umount_key#45){....}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888101f9e0e0 (&type->s_umount_key#45){....}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888101f9e0e0 (&type->s_umount_key#45){....}-{3:3}, at: deactivate_super+0x7a/0x90 fs/super.c:513
#1: ffffffff83a65da8 (jfs_log_mutex){....}-{3:3}, at: lmLogClose+0x4f/0x200 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/7187:
#0: ffff888121c220e0 (&type->s_umount_key#45){....}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888121c220e0 (&type->s_umount_key#45){....}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888121c220e0 (&type->s_umount_key#45){....}-{3:3}, at: deactivate_super+0x7a/0x90 fs/super.c:513
#1: ffffffff83a65da8 (jfs_log_mutex){....}-{3:3}, at: lmLogClose+0x4f/0x200 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/7190:
#0: ffff888121c260e0 (&type->s_umount_key#45){....}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888121c260e0 (&type->s_umount_key#45){....}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888121c260e0 (&type->s_umount_key#45){....}-{3:3}, at: deactivate_super+0x7a/0x90 fs/super.c:513
#1: ffffffff83a65da8 (jfs_log_mutex){....}-{3:3}, at: lmLogClose+0x4f/0x200 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/7192:
#0: ffff888101fa30e0 (&type->s_umount_key#45){....}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888101fa30e0 (&type->s_umount_key#45){....}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888101fa30e0 (&type->s_umount_key#45){....}-{3:3}, at: deactivate_super+0x7a/0x90 fs/super.c:513
#1: ffffffff83a65da8 (jfs_log_mutex){....}-{3:3}, at: lmLogClose+0x4f/0x200 fs/jfs/jfs_logmgr.c:1444
1 lock held by syz-executor/7196:
#0: ffff8881063ec0e0 (&type->s_umount_key#45){....}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8881063ec0e0 (&type->s_umount_key#45){....}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8881063ec0e0 (&type->s_umount_key#45){....}-{3:3}, at: deactivate_super+0x7a/0x90 fs/super.c:513
2 locks held by syz-executor/9837:
#0: ffff8881217d00e0 (&type->s_umount_key#45){....}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8881217d00e0 (&type->s_umount_key#45){....}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8881217d00e0 (&type->s_umount_key#45){....}-{3:3}, at: deactivate_super+0x7a/0x90 fs/super.c:513
#1: ffffffff83a65da8 (jfs_log_mutex){....}-{3:3}, at: lmLogClose+0x4f/0x200 fs/jfs/jfs_logmgr.c:1444
1 lock held by syz-executor/9841:
#0: ffff8881217d40e0 (&type->s_umount_key#45){....}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8881217d40e0 (&type->s_umount_key#45){....}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8881217d40e0 (&type->s_umount_key#45){....}-{3:3}, at: deactivate_super+0x7a/0x90 fs/super.c:513
1 lock held by syz-executor/9844:
#0: ffff8881227660e0 (&type->s_umount_key#45){....}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8881227660e0 (&type->s_umount_key#45){....}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8881227660e0 (&type->s_umount_key#45){....}-{3:3}, at: deactivate_super+0x7a/0x90 fs/super.c:513
2 locks held by syz.5.802/16770:
2 locks held by syz.2.803/16772:
2 locks held by syz.4.804/16774:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
dump_stack_lvl+0xeb/0x180 lib/dump_stack.c:106
nmi_cpu_backtrace+0x224/0x240 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0xea/0x1f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0x8cb/0x900 kernel/hung_task.c:379
kthread+0x114/0x140 kernel/kthread.c:388
ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 16776 Comm: syz.6.805 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0033:0x7f5ec8f00d40
Code: 49 8b 47 10 48 39 f0 72 6e 48 63 cd 48 01 c1 49 39 4f 08 72 4c 8d 4d ff 85 ed 74 33 66 0f 1f 44 00 00 48 39 f0 72 1b 4d 8b 07 <49> 89 c1 49 29 f1 47 0f b6 0c 08 45 84 c9 74 08 45 88 0c 00 49 8b
RSP: 002b:00007f5ec8aae4a0 EFLAGS: 00000206
RAX: 0000000000728807 RBX: 00007f5ec8aae540 RCX: 00000000000000d0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007f5ec8aae5e0
RBP: 0000000000000102 R08: 00007f5ec068f000 R09: 0000000000000000
R10: 0000000000000000 R11: 00007f5ec8aae550 R12: 0000000000000001
R13: 00007f5ec90dc7c0 R14: 0000000000000000 R15: 00007f5ec8aae5e0
FS: 00007f5ec8aaf6c0 GS: 0000000000000000