ci starts bisection 2025-12-16 18:52:22.141381465 +0000 UTC m=+1752731.666867569 bisecting fixing commit since 1b237f190eb3d36f52dffe07a40b5eb210280e00 building syzkaller on bf27483f963359281b2d9b6d6efd36289f82e282 ensuring issue is reproducible on original commit 1b237f190eb3d36f52dffe07a40b5eb210280e00 testing commit 1b237f190eb3d36f52dffe07a40b5eb210280e00 gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c24bacc6f353ab69e33627d5f5e7d45bc9f251dc3d2066cbdef334cd489cdf15 run #0: crashed: INFO: task hung in corrupted run #1: crashed: INFO: task hung in synchronize_rcu run #2: crashed: INFO: task hung in linkwatch_event run #3: crashed: INFO: task hung in rescuer_thread run #4: crashed: INFO: task hung in worker_attach_to_pool run #5: crashed: INFO: task hung in ret_from_fork run #6: crashed: INFO: task hung in reg_check_chans_work run #7: crashed: INFO: task hung in corrupted run #8: crashed: INFO: task hung in linkwatch_event run #9: crashed: INFO: task hung in addrconf_dad_work run #10: crashed: INFO: task hung in corrupted run #11: crashed: INFO: task hung in corrupted run #12: crashed: INFO: task hung in corrupted run #13: crashed: INFO: task hung in hci_cmd_sync_clear run #14: crashed: INFO: task hung in hci_conn_hash_flush run #15: crashed: no output from test machine run #16: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor1870207202" "root@10.128.0.167:./syz-executor1870207202"]: exit status 255 run #17: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor1146753261" "root@10.128.0.60:./syz-executor1146753261"]: exit status 255 run #18: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor1457192262" "root@10.128.0.206:./syz-executor1457192262"]: exit status 255 run #19: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor3327799817" "root@10.128.1.214:./syz-executor3327799817"]: exit status 255 representative crash: INFO: task hung in corrupted, 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 1b237f190eb3d36f52dffe07a40b5eb210280e00 gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 176ef2dbf469205d8387382bf247965455e7587114d4806a8a8c10220c9c88f8 run #0: crashed: INFO: task hung in del_device_store run #1: crashed: INFO: task hung in del_device_store run #2: crashed: INFO: task hung in new_device_store run #3: crashed: INFO: task hung in crda_timeout_work run #4: crashed: INFO: task hung in crda_timeout_work run #5: crashed: INFO: task hung in worker_attach_to_pool run #6: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor1557899638" "root@10.128.1.66:./syz-executor1557899638"]: exit status 255 run #7: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor2481549353" "root@10.128.1.139:./syz-executor2481549353"]: exit status 255 run #8: basic kernel testing failed: failed to copy binary to VM: timedout after 1m0s ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor3874594563" "root@10.128.1.72:./syz-executor3874594563"] run #9: OK representative crash: INFO: task hung in del_device_store, types: [HANG] the bug reproduces without the instrumentation disabling configs for [locking atomic_sleep memleak ubsan bug_or_warning kasan], they are not needed kconfig minimization: base=4109 full=8498 leaves diff=2188 split chunks (needed=false): <2188> split chunk #0 of len 2188 into 5 parts testing without sub-chunk 1/5 disabling configs for [kasan locking atomic_sleep memleak ubsan bug_or_warning], they are not needed testing commit 1b237f190eb3d36f52dffe07a40b5eb210280e00 gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c19026e88b8ecda2e09e7d3c1d20da77e76b1080bc5bb7b05ec547ea7fe69242 run #0: crashed: INFO: task hung in del_device_store run #1: crashed: INFO: task hung in addrconf_dad_work run #2: crashed: INFO: task hung in reg_todo run #3: crashed: INFO: task hung in crda_timeout_work run #4: crashed: INFO: task hung in rescuer_thread run #5: crashed: INFO: task hung in tun_chr_close run #6: crashed: INFO: task hung in addrconf_dad_work run #7: crashed: INFO: task hung in linkwatch_event run #8: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor3477638981" "root@10.128.1.217:./syz-executor3477638981"]: exit status 255 run #9: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor2360365752" "root@10.128.1.194:./syz-executor2360365752"]: exit status 255 representative crash: INFO: task hung in del_device_store, 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 1b237f190eb3d36f52dffe07a40b5eb210280e00 gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9c57cb4d69af06ebf12ec7bd5cef29fd8f3e40dd0f4e7b24ce634902c6ab0cad run #0: crashed: INFO: task hung in worker_attach_to_pool run #1: crashed: INFO: task hung in addrconf_dad_work run #2: crashed: INFO: task hung in synchronize_rcu run #3: crashed: INFO: task hung in worker_attach_to_pool run #4: crashed: INFO: task hung in tun_chr_close run #5: crashed: INFO: task hung in rescuer_thread run #6: crashed: INFO: task hung in addrconf_dad_work run #7: crashed: INFO: task hung in tun_chr_close run #8: crashed: INFO: task hung in tun_chr_close run #9: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor2667447991" "root@10.128.0.168:./syz-executor2667447991"]: exit status 255 representative crash: INFO: task hung in worker_attach_to_pool, types: [HANG] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed testing commit 1b237f190eb3d36f52dffe07a40b5eb210280e00 gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fb247572f41245387e07ca389094d10dcae975618cbd3533167b1086062b8907 all runs: OK false negative chance: 0.000 testing without sub-chunk 4/5 disabling configs for [locking atomic_sleep memleak ubsan bug_or_warning kasan], they are not needed testing commit 1b237f190eb3d36f52dffe07a40b5eb210280e00 gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f903f8afad6189dfd36fe60a6bcffcc9e3a30a4022b6b1d1ab170084e6e11c04 run #0: crashed: INFO: task hung in linkwatch_event run #1: crashed: INFO: task hung in tun_chr_close run #2: crashed: INFO: task hung in ret_from_fork run #3: crashed: INFO: task hung in linkwatch_event run #4: crashed: INFO: task hung in inet_rtm_newaddr run #5: crashed: INFO: task hung in linkwatch_event run #6: crashed: INFO: task hung in linkwatch_event run #7: crashed: INFO: task hung in reg_check_chans_work run #8: crashed: INFO: task hung in linkwatch_event run #9: crashed: INFO: task hung in reg_check_chans_work representative crash: INFO: task hung in linkwatch_event, types: [HANG] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 1b237f190eb3d36f52dffe07a40b5eb210280e00 gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b6db06b3dcc8709e208a746f9275547fd5a72966527dd609c52a0fb96fe62fbd all runs: OK false negative chance: 0.000 minimized to 874 configs; suspects: [ARCH_ENABLE_MEMORY_HOTREMOVE ATM AX25 BCMA BLK_DEV_ZONED BPF_SYSCALL BRIDGE BRIDGE_NETFILTER CAN CARDBUS CFG80211 CFG80211_WEXT CHECKPOINT_RESTORE CMA COMMON_CLK CONTIG_ALLOC DVB_CORE EXTCON FB_CORE GPIOLIB HAMRADIO HID_LOGITECH HID_ZEROPLUS HSR I2C_MUX IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_USER_ACCESS INPUT_JOYSTICK INPUT_MOUSE IOMMUFD IPV6_MULTIPLE_TABLES IP_NF_MATCH_RPFILTER IP_NF_MATCH_TTL IP_NF_TARGET_ECN IP_NF_TARGET_REJECT IP_NF_TARGET_SYNPROXY 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 IRQ_REMAP IR_IGORPLUGUSB IR_IGUANA IR_IMON IR_IMON_RAW IR_MCEUSB IR_REDRAT3 IR_STREAMZAP IR_TOY IR_TTUSBIR ISDN ISDN_CAPI 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_COMMON KVM_COMPAT KVM_ELIDE_TLB_FLUSH_IF_YOUNG KVM_GENERIC_DIRTYLOG_READ_PROTECT KVM_GENERIC_HARDWARE_ENABLING KVM_GENERIC_MEMORY_ATTRIBUTES KVM_GENERIC_MMU_NOTIFIER KVM_GENERIC_PRE_FAULT_MEMORY KVM_GENERIC_PRIVATE_MEM KVM_HYPERV KVM_INTEL KVM_IOAPIC KVM_MMIO KVM_MMU_LOCKLESS_AGING KVM_PRIVATE_MEM KVM_PROVE_MMU KVM_SW_PROTECTED_VM KVM_VFIO KVM_X86 KVM_XEN KVM_XFER_TO_GUEST_WORK L2TP L2TP_ETH L2TP_IP L2TP_V3 LAPB LAPBETHER LDM_PARTITION LEDS_CLASS_MULTICOLOR LEGACY_PTYS LIBNVDIMM LINEAR_RANGES LLC LLC2 LOGIG940_FF LOGIRUMBLEPAD2_FF LOGITECH_FF LOGIWHEELS_FF LOGO LOGO_LINUX_MONO LOGO_LINUX_VGA16 LPC_ICH LWTUNNEL LWTUNNEL_BPF LZ4HC_COMPRESS LZ4_COMPRESS MAC80211 MAC80211_HAS_RC MAC80211_HWSIM MAC80211_MESH MAC80211_RC_DEFAULT_MINSTREL MAC80211_RC_MINSTREL MACSEC MACVLAN MACVTAP MAC_PARTITION MAPPING_DIRTY_HELPERS MCTP MDIO_MVUSB MD_RAID0 MD_RAID1 MD_RAID10 MD_RAID456 MEDIA_ANALOG_TV_SUPPORT MEDIA_ATTACH MEDIA_CAMERA_SUPPORT MEDIA_CEC_SUPPORT MEDIA_CONTROLLER MEDIA_CONTROLLER_DVB MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_SUPPORT_FILTER MEDIA_TEST_SUPPORT MEDIA_TUNER MEDIA_TUNER_MSI001 MEDIA_USB_SUPPORT MEMORY_BALLOON MEMORY_HOTPLUG MEMORY_HOTREMOVE MEMORY_ISOLATION MEMREGION MEMSTICK MEMSTICK_REALTEK_USB MEM_SOFT_DIRTY MFD_CORE MFD_SYSCON MFD_VIPERBOARD MHI_BUS MHI_WWAN_CTRL MHP_DEFAULT_ONLINE_TYPE_ONLINE_AUTO MHP_MEMMAP_ON_MEMORY MICROCHIP_PHY MINIX_FS MINIX_SUBPARTITION MIN_HEAP 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 MM_ID MODULE_SRCVERSION_ALL 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_NAT 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_RATEEST NETFILTER_XT_TARGET_REDIRECT NETFILTER_XT_TARGET_TCPOPTSTRIP NETFILTER_XT_TARGET_TEE NETFILTER_XT_TARGET_TPROXY 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_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_CRC32C 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_SHAPER 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_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_OVS NF_NAT_PPTP NF_TABLES NF_TABLES_BRIDGE NF_TABLES_INET NF_TABLES_IPV4 NF_TABLES_IPV6 NF_TABLES_NETDEV NOP_USB_XCEIV PARPORT PARTITION_ADVANCED PCCARD PCMCIA PHONET PSAMPLE RADIO_ADAPTERS RADIO_SI470X RADIO_SI4713 RC_CORE RC_DEVICES RFKILL SND SOUND SPI SSB TAP TARGET_CORE TUN USB_ACM USB_ADUTUX USB_AIRSPY USB_ALI_M5632 USB_AMD5536UDC USB_AN2720 USB_APPLEDISPLAY USB_ARMLINUX USB_ATM USB_BDC_UDC USB_BELKIN USB_C67X00_HCD USB_CATC USB_CDC_PHONET USB_CDNS2_UDC USB_CDNS3 USB_CDNS3_GADGET USB_CDNS3_HOST USB_CDNS3_PCI_WRAP USB_CDNSP_GADGET USB_CDNSP_HOST USB_CDNSP_PCI USB_CDNS_HOST USB_CDNS_SUPPORT USB_CHAOSKEY USB_CHIPIDEA USB_CHIPIDEA_GENERIC USB_CHIPIDEA_HOST USB_CHIPIDEA_MSM USB_CHIPIDEA_NPCM 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_CONFIGFS_F_MIDI2 USB_CONFIGFS_F_PRINTER USB_CONFIGFS_F_TCM USB_CONFIGFS_F_UAC1 USB_CONFIGFS_F_UAC1_LEGACY USB_CONFIGFS_F_UAC2 USB_CONFIGFS_F_UVC USB_CONFIGFS_MASS_STORAGE USB_CONFIGFS_NCM USB_CONFIGFS_OBEX USB_CONFIGFS_PHONET USB_CONFIGFS_RNDIS USB_CONFIGFS_SERIAL USB_CONN_GPIO USB_CXACRU USB_CYPRESS_CY7C63 USB_CYTHERM USB_DSBR USB_DUMMY_HCD USB_DWC2 USB_DWC2_HOST USB_DWC2_PCI USB_DWC3 USB_DWC3_GADGET USB_DWC3_HAPS USB_DWC3_OF_SIMPLE USB_DWC3_PCI USB_DWC3_ULPI USB_DYNAMIC_MINORS USB_EG20T USB_EHCI_FSL USB_EHCI_HCD_PLATFORM USB_EHCI_ROOT_HUB_TT USB_EHSET_TEST_FIXTURE USB_EMI26 USB_EMI62 USB_EPSON2888 USB_EZUSB_FX2 USB_FEW_INIT_RETRIES USB_F_ACM USB_F_ECM USB_F_EEM USB_F_FS USB_F_HID USB_F_MASS_STORAGE USB_F_MIDI USB_F_MIDI2 USB_F_NCM USB_F_OBEX USB_F_PHONET USB_F_PRINTER USB_F_RNDIS USB_F_SERIAL USB_F_SS_LB USB_F_SUBSET USB_F_TCM USB_F_UAC1 USB_F_UAC1_LEGACY USB_F_UAC2 USB_F_UVC USB_GADGET USB_GADGETFS USB_GADGET_DEBUG_FILES USB_GADGET_DEBUG_FS USB_GL860 USB_GOKU USB_GR_UDC USB_GSPCA USB_GSPCA_BENQ USB_GSPCA_CONEX USB_GSPCA_CPIA1 USB_GSPCA_DTCS033 USB_GSPCA_ETOMS USB_GSPCA_FINEPIX USB_GSPCA_JEILINJ USB_GSPCA_JL2005BCD USB_GSPCA_KINECT USB_GSPCA_KONICA USB_GSPCA_MARS USB_GSPCA_MR97310A USB_GSPCA_NW80X USB_GSPCA_OV519 USB_GSPCA_OV534 USB_GSPCA_OV534_9 USB_GSPCA_PAC207 USB_GSPCA_PAC7302 USB_GSPCA_PAC7311 USB_GSPCA_SE401 USB_GSPCA_SN9C2028 USB_GSPCA_SN9C20X USB_GSPCA_SONIXB USB_GSPCA_SONIXJ USB_GSPCA_SPCA1528 USB_GSPCA_SPCA500 USB_GSPCA_SPCA501 USB_GSPCA_SPCA505 USB_GSPCA_SPCA506 USB_GSPCA_SPCA508 USB_GSPCA_SPCA561 USB_GSPCA_SQ905 USB_GSPCA_SQ905C USB_GSPCA_SQ930X USB_GSPCA_STK014 USB_GSPCA_STK1135 USB_GSPCA_STV0680 USB_GSPCA_SUNPLUS USB_GSPCA_T613 USB_GSPCA_TOPRO USB_GSPCA_TOUPTEK USB_GSPCA_TV8532 USB_GSPCA_VC032X USB_GSPCA_VICAM USB_GSPCA_XIRLINK_CIT USB_GSPCA_ZC3XX USB_HACKRF USB_HCD_BCMA USB_HCD_SSB USB_HSIC_USB3503 USB_HSIC_USB4604 USB_HSO USB_HUB_USB251XB USB_IDMOUSE USB_IOWARRIOR USB_IPHETH USB_ISIGHTFW USB_ISP116X_HCD USB_ISP1301 USB_ISP1760 USB_ISP1760_DUAL_ROLE USB_ISP1760_HCD USB_ISP1761_UDC USB_KAWETH USB_KC2190 USB_KEENE USB_LAN78XX USB_LCD USB_LD USB_LEDS_TRIGGER_USBPORT USB_LED_TRIG USB_LEGOTOWER USB_LGM_PHY USB_LIBCOMPOSITE USB_LINK_LAYER_TEST USB_M5602 USB_MA901 USB_MAX3420_UDC USB_MAX3421_HCD USB_MDC800 USB_MICROTEK USB_MR800 USB_MSI2500 USB_MUSB_DUAL_ROLE USB_MUSB_HDRC USB_NET2280 USB_NET_AQC111 USB_NET_AX88179_178A USB_NET_AX8817X USB_NET_CDCETHER USB_NET_CDC_EEM USB_NET_CDC_MBIM USB_NET_CDC_NCM USB_NET_CDC_SUBSET USB_NET_CDC_SUBSET_ENABLE USB_NET_CH9200 USB_NET_CX82310_ETH USB_NET_DM9601 USB_NET_GL620A USB_NET_HUAWEI_CDC_NCM USB_NET_INT51X1 USB_NET_KALMIA USB_NET_MCS7830 USB_NET_NET1080 USB_NET_PLUSB USB_NET_QMI_WWAN USB_NET_RNDIS_HOST USB_NET_SMSC75XX USB_NET_SMSC95XX USB_NET_SR9700 USB_NET_SR9800 USB_NET_ZAURUS USB_OHCI_HCD_PLATFORM USB_OTG USB_OTG_FSM USB_OXU210HP_HCD USB_PEGASUS USB_PULSE8_CEC USB_PWC USB_PWC_INPUT_EVDEV USB_PXA27X USB_R8A66597 USB_R8A66597_HCD USB_RAINSHADOW_CEC USB_RAREMONO USB_RAW_GADGET USB_RTL8150 USB_RTL8152 USB_RTL8153_ECM USB_S2255 USB_SERIAL USB_SERIAL_AIRCABLE USB_SERIAL_ARK3116 USB_SERIAL_BELKIN USB_SERIAL_CH341 USB_SERIAL_CONSOLE USB_SERIAL_CP210X USB_SERIAL_CYBERJACK USB_SERIAL_CYPRESS_M8 USB_SERIAL_DEBUG USB_SERIAL_DIGI_ACCELEPORT USB_SERIAL_EDGEPORT USB_SERIAL_EDGEPORT_TI USB_SERIAL_EMPEG USB_SERIAL_F81232 USB_SERIAL_F8153X USB_SERIAL_FTDI_SIO USB_SERIAL_GARMIN USB_SERIAL_GENERIC USB_SERIAL_IPAQ USB_SERIAL_IPW USB_SERIAL_IR USB_SERIAL_IUU USB_SERIAL_KEYSPAN USB_SERIAL_KEYSPAN_PDA USB_SERIAL_KLSI USB_SERIAL_KOBIL_SCT USB_SERIAL_MCT_U232 USB_SERIAL_METRO USB_SERIAL_MOS7715_PARPORT USB_SERIAL_MOS7720 USB_SERIAL_MOS7840 USB_SERIAL_MXUPORT USB_SERIAL_NAVMAN USB_SERIAL_OMNINET USB_SERIAL_OPTICON USB_SERIAL_OPTION USB_SERIAL_OTI6858 USB_SERIAL_PL2303 USB_SERIAL_QCAUX USB_SERIAL_QT2 USB_SERIAL_QUALCOMM USB_SERIAL_SAFE USB_SERIAL_SIERRAWIRELESS USB_SERIAL_SIMPLE USB_SERIAL_SPCP8X5 USB_SERIAL_SSU100 USB_SERIAL_SYMBOL USB_SERIAL_TI USB_SERIAL_UPD78F0730 USB_SERIAL_VISOR USB_SERIAL_WHITEHEAT USB_SERIAL_WISHBONE USB_SERIAL_WWAN USB_SERIAL_XR USB_SERIAL_XSENS_MT USB_SEVSEG USB_SI470X USB_SI4713 USB_SIERRA_NET USB_SISUSBVGA USB_SL811_CS USB_SL811_HCD USB_SL811_HCD_ISO USB_SNP_CORE USB_SPEEDTOUCH USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_ENE_UB6250 USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_STV06XX USB_TEST USB_TMC USB_TRANCEVIBRATOR USB_UAS USB_UEAGLEATM USB_ULPI_BUS USB_USBNET USB_USS720 USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_VIDEO_CLASS USB_VIDEO_CLASS_INPUT_EVDEV USB_VL600 USB_WDM USB_XHCI_DBGCAP USB_XHCI_PCI_RENESAS USB_XHCI_PLATFORM USB_XUSBATM USB_YUREX USERFAULTFD USERIO USER_RETURN_NOTIFIER UVC_COMMON U_SERIAL_CONSOLE V4L2_ASYNC V4L2_FWNODE V4L2_MEM2MEM_DEV V4L_TEST_DRIVERS VALIDATE_FS_PARSER VDPA VDPA_SIM VDPA_SIM_BLOCK VDPA_SIM_NET VETH VFIO VFIO_DEVICE_CDEV VFIO_PCI VFIO_PCI_CORE VFIO_PCI_INTX VFIO_VIRQFD VGASTATE VHOST VHOST_CROSS_ENDIAN_LEGACY VHOST_IOTLB VHOST_NET VHOST_RING VHOST_TASK VHOST_VDPA VHOST_VSOCK VIDEO VIDEOBUF2_CORE VIDEOBUF2_DMA_CONTIG VIDEOBUF2_DMA_SG VIDEOBUF2_MEMOPS VIDEOBUF2_V4L2 VIDEOBUF2_VMALLOC VIDEOMODE_HELPERS VIDEO_AU0828 VIDEO_AU0828_RC VIDEO_AU0828_V4L2 VIDEO_CAMERA_LENS VIDEO_CS53L32A VIDEO_CX231XX VIDEO_CX231XX_ALSA VIDEO_CX231XX_DVB VIDEO_CX231XX_RC VIDEO_CX2341X VIDEO_CX25840 VIDEO_DEV VIDEO_EM28XX VIDEO_EM28XX_ALSA VIDEO_EM28XX_DVB VIDEO_EM28XX_RC VIDEO_EM28XX_V4L2 VIDEO_GO7007 VIDEO_GO7007_LOADER VIDEO_GO7007_USB VIDEO_GO7007_USB_S2250_BOARD VIDEO_HDPVR VIDEO_MSP3400 VIDEO_PVRUSB2 VIDEO_PVRUSB2_DVB VIDEO_PVRUSB2_SYSFS VIDEO_SAA711X VIDEO_STK1160 VIDEO_TUNER VIDEO_TVEEPROM VIDEO_USBTV VIDEO_V4L2_I2C VIDEO_V4L2_SUBDEV_API VIDEO_V4L2_TPG VIDEO_VICODEC VIDEO_VIM2M VIDEO_VIMC VIDEO_VIVID VIDEO_VIVID_CEC VIDEO_WM8775 VIPERBOARD_ADC VIRTIO_BALLOON VIRTIO_DMA_SHARED_BUFFER VIRTIO_MEM VIRTIO_MMIO VIRTIO_MMIO_CMDLINE_DEVICES VIRTIO_PMEM VIRTIO_VDPA VIRTIO_VSOCKETS VIRTIO_VSOCKETS_COMMON VIRT_WIFI VLAN_8021Q VLAN_8021Q_GVRP VLAN_8021Q_MVRP VMAP_PFN VMWARE_VMCI VMXNET3 VP_VDPA VSOCKETS VSOCKETS_DIAG VSOCKETS_LOOPBACK VSOCKMON VT_HW_CONSOLE_BINDING VXFS_FS WAN WANT_DEV_COREDUMP WATCH_QUEUE WEXT_CORE WEXT_PROC WIREGUARD WIRELESS WLAN WLAN_VENDOR_ADMTEK WLAN_VENDOR_SILABS WWAN X25 X86_64_SMP X86_SGX X86_SGX_KVM X86_USER_SHADOW_STACK X86_X32_ABI XDP_SOCKETS XDP_SOCKETS_DIAG XFRM_ESPINTCP XFRM_INTERFACE XFRM_IPCOMP XFRM_MIGRATE XFRM_OFFLOAD XFRM_STATISTICS XFRM_SUB_POLICY XFRM_USER_COMPAT XFS_FS XFS_POSIX_ACL XFS_QUOTA XFS_RT XILLYBUS_CLASS XILLYUSB XOR_BLOCKS YENTA YENTA_ENE_TUNE YENTA_O2 YENTA_RICOH YENTA_TI YENTA_TOSHIBA ZEROPLUS_FF ZLIB_DEFLATE ZONEFS_FS ZPOOL ZRAM ZRAM_BACKEND_FORCE_LZO ZRAM_BACKEND_LZO ZRAM_DEF_COMP_LZO ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_842 ZSWAP_DEFAULT_ON ZSWAP_SHRINKER_DEFAULT_ON ZSWAP_ZPOOL_DEFAULT_ZSMALLOC] disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed testing current HEAD 40fbbd64bba6c6e7a72885d2f59b6a3be9991eeb testing commit 40fbbd64bba6c6e7a72885d2f59b6a3be9991eeb gcc compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ced4a2ba977cf895018c51be0fb0b06c7c57813a25a9cbb1e2ae602e4313bd82 run #0: crashed: INFO: task hung in synchronize_rcu run #1: crashed: INFO: task hung in synchronize_rcu run #2: crashed: INFO: task hung in synchronize_rcu run #3: crashed: INFO: task hung in worker_attach_to_pool run #4: crashed: INFO: task hung in linkwatch_event run #5: crashed: INFO: task hung in tun_chr_close run #6: crashed: INFO: task hung in synchronize_rcu run #7: crashed: INFO: task hung in synchronize_rcu run #8: crashed: INFO: task hung in linkwatch_event run #9: OK representative crash: INFO: task hung in synchronize_rcu, types: [HANG] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 3h21m38.277841688s (build: 1h18m11.458171279s, test: 1h20m40.86046212s) crash still not fixed or there were kernel test errors commit msg: Merge tag 'pull-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs crash: INFO: task hung in synchronize_rcu INFO: task kworker/u8:2:37 blocked for more than 151 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:2 state:D stack:12568 pid:37 tgid:37 ppid:2 task_flags:0x4208060 flags:0x00080000 Workqueue: events_unbound fsnotify_connector_destroy_workfn Call Trace: context_switch kernel/sched/core.c:5256 [inline] __schedule+0x578/0xfe0 kernel/sched/core.c:6863 __schedule_loop kernel/sched/core.c:6945 [inline] schedule+0x25/0x110 kernel/sched/core.c:6960 schedule_timeout+0x155/0x160 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:100 [inline] __wait_for_common+0x99/0x1b0 kernel/sched/completion.c:121 __synchronize_srcu+0xf6/0x130 kernel/rcu/srcutree.c:1518 fsnotify_connector_destroy_workfn+0x40/0x70 fs/notify/mark.c:322 process_one_work+0x328/0x940 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x319/0x5c0 kernel/workqueue.c:3421 kthread+0x168/0x2d0 kernel/kthread.c:463 ret_from_fork+0x375/0x410 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Showing all locks held in the system: 1 lock held by kworker/R-rcu_g/4: #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: worker_detach_from_pool kernel/workqueue.c:2730 [inline] #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: rescuer_thread+0x2de/0x670 kernel/workqueue.c:3560 1 lock held by kworker/R-kvfre/6: #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: worker_attach_to_pool+0x23/0x150 kernel/workqueue.c:2672 2 locks held by kworker/0:0/9: 2 locks held by kworker/0:1/11: 1 lock held by kworker/R-mm_pe/13: #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: worker_detach_from_pool kernel/workqueue.c:2730 [inline] #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: rescuer_thread+0x2de/0x670 kernel/workqueue.c:3560 2 locks held by kworker/u8:1/14: #0: ffff888100074d48 ((wq_completion)events_unbound#2){....}-{0:0}, at: process_one_work+0x7b0/0x940 kernel/workqueue.c:3232 #1: ffffc9000007be18 ((reaper_work).work){....}-{0:0}, at: process_one_work+0x2cc/0x940 kernel/workqueue.c:3233 2 locks held by kworker/1:0/24: 1 lock held by khungtaskd/31: #0: ffffffff84dae4c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #0: ffffffff84dae4c0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline] #0: ffffffff84dae4c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x36/0x120 kernel/locking/lockdep.c:6775 1 lock held by kworker/R-write/33: #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: worker_detach_from_pool kernel/workqueue.c:2730 [inline] #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: rescuer_thread+0x2de/0x670 kernel/workqueue.c:3560 2 locks held by kworker/u8:2/37: #0: ffff888100074d48 ((wq_completion)events_unbound#2){....}-{0:0}, at: process_one_work+0x7b0/0x940 kernel/workqueue.c:3232 #1: ffffc9000013fe18 (connector_reaper_work){....}-{0:0}, at: process_one_work+0x2cc/0x940 kernel/workqueue.c:3233 2 locks held by kworker/1:1/40: 2 locks held by kworker/0:2/1345: 3 locks held by kworker/u8:9/2780: #0: ffff888113a1f948 ((wq_completion)ipv6_addrconf){....}-{0:0}, at: process_one_work+0x7b0/0x940 kernel/workqueue.c:3232 #1: ffffc9000914fe18 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){....}-{0:0}, at: process_one_work+0x2cc/0x940 kernel/workqueue.c:3233 #2: ffffffff84fe0088 (rtnl_mutex){....}-{3:3}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline] #2: ffffffff84fe0088 (rtnl_mutex){....}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4734 9 locks held by kworker/u8:10/2782: 3 locks held by kworker/u8:13/2916: #0: ffff888100074d48 ((wq_completion)events_unbound#2){....}-{0:0}, at: process_one_work+0x7b0/0x940 kernel/workqueue.c:3232 #1: ffffc9000929fe18 ((linkwatch_work).work){....}-{0:0}, at: process_one_work+0x2cc/0x940 kernel/workqueue.c:3233 #2: ffffffff84fe0088 (rtnl_mutex){....}-{3:3}, at: linkwatch_event+0x13/0x50 net/core/link_watch.c:303 2 locks held by kworker/1:2/3392: 2 locks held by getty/3759: #0: ffff8881151bf0a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x60 drivers/tty/tty_ldisc.c:243 #1: ffffc9000a1cb2f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x22b/0xaf0 drivers/tty/n_tty.c:2211 2 locks held by kworker/1:3/4005: 2 locks held by kworker/0:3/4066: 2 locks held by kworker/1:4/4067: 2 locks held by kworker/0:4/4195: 2 locks held by kworker/1:5/4196: 2 locks held by kworker/1:6/4197: 2 locks held by kworker/0:5/4198: 1 lock held by syz-executor/4683: #0: ffffffff84fe0088 (rtnl_mutex){....}-{3:3}, at: tun_detach drivers/net/tun.c:634 [inline] #0: ffffffff84fe0088 (rtnl_mutex){....}-{3:3}, at: tun_chr_close+0x19/0x100 drivers/net/tun.c:3436 1 lock held by syz-executor/4691: #0: ffffffff84fe0088 (rtnl_mutex){....}-{3:3}, at: tun_detach drivers/net/tun.c:634 [inline] #0: ffffffff84fe0088 (rtnl_mutex){....}-{3:3}, at: tun_chr_close+0x19/0x100 drivers/net/tun.c:3436 1 lock held by syz-executor/4696: 1 lock held by kworker/R-wg-cr/4748: #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: worker_detach_from_pool kernel/workqueue.c:2730 [inline] #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: rescuer_thread+0x2de/0x670 kernel/workqueue.c:3560 2 locks held by kworker/R-wg-cr/4751: 1 lock held by kworker/R-wg-cr/4752: #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: worker_detach_from_pool kernel/workqueue.c:2730 [inline] #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: rescuer_thread+0x2de/0x670 kernel/workqueue.c:3560 1 lock held by kworker/R-wg-cr/4757: #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: worker_detach_from_pool kernel/workqueue.c:2730 [inline] #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: rescuer_thread+0x2de/0x670 kernel/workqueue.c:3560 1 lock held by kworker/R-wg-cr/4758: #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: worker_detach_from_pool kernel/workqueue.c:2730 [inline] #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: rescuer_thread+0x2de/0x670 kernel/workqueue.c:3560 1 lock held by kworker/R-wg-cr/4759: #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: worker_detach_from_pool kernel/workqueue.c:2730 [inline] #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: rescuer_thread+0x2de/0x670 kernel/workqueue.c:3560 1 lock held by kworker/R-wg-cr/4761: #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: worker_detach_from_pool kernel/workqueue.c:2730 [inline] #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: rescuer_thread+0x2de/0x670 kernel/workqueue.c:3560 1 lock held by kworker/R-wg-cr/4762: #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: worker_detach_from_pool kernel/workqueue.c:2730 [inline] #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: rescuer_thread+0x2de/0x670 kernel/workqueue.c:3560 1 lock held by kworker/R-wg-cr/4766: #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: worker_detach_from_pool kernel/workqueue.c:2730 [inline] #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: rescuer_thread+0x2de/0x670 kernel/workqueue.c:3560 1 lock held by kworker/R-wg-cr/4769: 1 lock held by kworker/R-wg-cr/4772: #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: worker_detach_from_pool kernel/workqueue.c:2730 [inline] #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: rescuer_thread+0x2de/0x670 kernel/workqueue.c:3560 1 lock held by kworker/R-wg-cr/4773: #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: worker_detach_from_pool kernel/workqueue.c:2730 [inline] #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: rescuer_thread+0x2de/0x670 kernel/workqueue.c:3560 1 lock held by kworker/R-wg-cr/4775: #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: worker_detach_from_pool kernel/workqueue.c:2730 [inline] #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: rescuer_thread+0x2de/0x670 kernel/workqueue.c:3560 1 lock held by kworker/R-wg-cr/4776: #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: worker_detach_from_pool kernel/workqueue.c:2730 [inline] #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: rescuer_thread+0x2de/0x670 kernel/workqueue.c:3560 1 lock held by kworker/R-wg-cr/4777: #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: worker_detach_from_pool kernel/workqueue.c:2730 [inline] #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: rescuer_thread+0x2de/0x670 kernel/workqueue.c:3560 2 locks held by kworker/0:6/5453: 2 locks held by kworker/1:7/5637: 2 locks held by kworker/1:8/5648: 2 locks held by kworker/0:7/6428: 1 lock held by kworker/1:9/6429: #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: worker_attach_to_pool+0x23/0x150 kernel/workqueue.c:2672 1 lock held by kworker/0:8/6436: 1 lock held by kworker/u8:15/6441: #0: ffffffff84cc21c8 (wq_pool_attach_mutex){....}-{3:3}, at: worker_attach_to_pool+0x23/0x150 kernel/workqueue.c:2672 1 lock held by dhcpcd/6446: 1 lock held by syz.5.413/6452: #0: ffffffff84fe0088 (rtnl_mutex){....}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #0: ffffffff84fe0088 (rtnl_mutex){....}-{3:3}, at: rtnetlink_rcv_msg+0x201/0x6d0 net/core/rtnetlink.c:6964 1 lock held by syz-executor/6451: #0: ffffffff84fe0088 (rtnl_mutex){....}-{3:3}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline] #0: ffffffff84fe0088 (rtnl_mutex){....}-{3:3}, at: inet_rtm_newaddr+0x185/0x700 net/ipv4/devinet.c:978 1 lock held by syz-executor/6459: #0: ffffffff84fe0088 (rtnl_mutex){....}-{3:3}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline] #0: ffffffff84fe0088 (rtnl_mutex){....}-{3:3}, at: inet_rtm_newaddr+0x185/0x700 net/ipv4/devinet.c:978 1 lock held by dhcpcd/6461: 1 lock held by syz-executor/6462: #0: ffffffff84fe0088 (rtnl_mutex){....}-{3:3}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline] #0: ffffffff84fe0088 (rtnl_mutex){....}-{3:3}, at: inet_rtm_newaddr+0x185/0x700 net/ipv4/devinet.c:978 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(none) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xc7/0x130 lib/dump_stack.c:120 nmi_cpu_backtrace+0x1b2/0x210 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x1b4/0x1e0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] __sys_info lib/sys_info.c:157 [inline] sys_info+0x133/0x180 lib/sys_info.c:165 check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline] watchdog+0x8fc/0x960 kernel/hung_task.c:515 kthread+0x168/0x2d0 kernel/kthread.c:463 ret_from_fork+0x375/0x410 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 2782 Comm: kworker/u8:10 Not tainted syzkaller #0 PREEMPT(none) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: wg-kex-wg1 wg_packet_handshake_send_worker RIP: 0010:rol32 include/linux/bitops.h:126 [inline] RIP: 0010:iterate_chain_key kernel/locking/lockdep.c:451 [inline] RIP: 0010:__lock_acquire.constprop.0+0x29f/0x5b0 kernel/locking/lockdep.c:5225 Code: 41 01 d7 c1 c0 08 31 c8 89 c1 29 c2 44 01 f8 c1 c1 10 89 c7 31 d1 89 ce 41 29 cf 01 c1 c1 ce 0d 44 31 fe 89 f2 29 f7 8d 04 31 c2 04 31 fa 48 c1 e2 20 48 09 d0 48 89 83 40 0a 00 00 8b 83 48 RSP: 0018:ffffc900088ff698 EFLAGS: 00000802 RAX: 000000006b423b5c RBX: ffff88811651a240 RCX: 00000000096307ab RDX: 0000000061df33b1 RSI: 0000000061df33b1 RDI: 0000000050aaf904 RBP: 0000000000000000 R08: 0000000000080000 R09: ffff88811651ad80 R10: 0000000000000001 R11: 00000000c50c4b4e R12: ffff88811651ada8 R13: 0000000000000000 R14: 0000000000000007 R15: 00000000b66d8577 FS: 0000000000000000(0000) GS:ffff8882b14f3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2decf98218 CR3: 0000000004c78000 CR4: 00000000003526f0 Call Trace: lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0xa8/0x180 kernel/locking/lockdep.c:5825 local_lock_acquire include/linux/local_lock_internal.h:41 [inline] get_random_u16+0x73/0x2a0 drivers/char/random.c:553 cake_get_flow_quantum+0xac/0xd0 net/sched/sch_cake.c:687 cake_dequeue+0x2c6/0x1ab0 net/sched/sch_cake.c:2120 dequeue_skb net/sched/sch_generic.c:297 [inline] qdisc_restart net/sched/sch_generic.c:402 [inline] __qdisc_run+0xdb/0x9a0 net/sched/sch_generic.c:420 qdisc_run include/net/pkt_sched.h:120 [inline] qdisc_run include/net/pkt_sched.h:117 [inline] __dev_xmit_skb net/core/dev.c:4250 [inline] __dev_queue_xmit+0x132f/0x1b10 net/core/dev.c:4783 dev_queue_xmit include/linux/netdevice.h:3381 [inline] neigh_hh_output include/net/neighbour.h:540 [inline] neigh_output include/net/neighbour.h:554 [inline] ip6_finish_output2+0x5e7/0xaf0 net/ipv6/ip6_output.c:136 __ip6_finish_output+0x2b8/0x6f0 net/ipv6/ip6_output.c:209 ip6_finish_output net/ipv6/ip6_output.c:220 [inline] NF_HOOK_COND include/linux/netfilter.h:307 [inline] ip6_output+0xfb/0x2e0 net/ipv6/ip6_output.c:247 dst_output include/net/dst.h:464 [inline] ip6_local_out+0x86/0x210 net/ipv6/output_core.c:157 ip6tunnel_xmit include/net/ip6_tunnel.h:162 [inline] udp_tunnel6_xmit_skb+0x1f5/0x330 net/ipv6/ip6_udp_tunnel.c:112 send6+0x199/0x420 drivers/net/wireguard/socket.c:152 wg_socket_send_skb_to_peer+0x8a/0x110 drivers/net/wireguard/socket.c:178 wg_socket_send_buffer_to_peer+0x8d/0xb0 drivers/net/wireguard/socket.c:200 wg_packet_send_handshake_initiation+0x140/0x1b0 drivers/net/wireguard/send.c:40 wg_packet_handshake_send_worker+0x1c/0x30 drivers/net/wireguard/send.c:51 process_one_work+0x328/0x940 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x319/0x5c0 kernel/workqueue.c:3421 kthread+0x168/0x2d0 kernel/kthread.c:463 ret_from_fork+0x375/0x410 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246