ci2 starts bisection 2025-11-26 13:31:31.585043816 +0000 UTC m=+103.762166893 bisecting fixing commit since d7039b844a1c0817aef0c66c2f87cd6b29fbd29e building syzkaller on 6b856513c13bbdf86191190923fb64438219ea68 ensuring issue is reproducible on original commit d7039b844a1c0817aef0c66c2f87cd6b29fbd29e testing commit d7039b844a1c0817aef0c66c2f87cd6b29fbd29e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: f046703e7230d9b3d9064eb70a40e0eb46219c8b36176542e8b5e9f3bb4d035e run #0: basic kernel testing failed: WARNING in call_timer_fn run #1: crashed: INFO: task hung in uevent_show run #2: crashed: INFO: task hung in rfkill_global_led_trigger_worker run #3: crashed: INFO: task hung in rfkill_unregister run #4: crashed: INFO: task hung in genl_rcv_msg run #5: crashed: INFO: task hung in rfkill_sync_work run #6: crashed: INFO: task hung in rfkill_global_led_trigger_worker run #7: crashed: INFO: task hung in rfkill_unregister run #8: crashed: INFO: task hung in rfkill_global_led_trigger_worker run #9: crashed: INFO: task hung in nfc_rfkill_set_block run #10: crashed: INFO: task hung in uevent_show run #11: crashed: INFO: task hung in uevent_show run #12: crashed: INFO: task hung in rfkill_unregister run #13: crashed: INFO: task hung in rfkill_global_led_trigger_worker run #14: crashed: INFO: task hung in rfkill_global_led_trigger_worker run #15: crashed: INFO: task hung in nfc_rfkill_set_block run #16: crashed: INFO: task hung in rfkill_global_led_trigger_worker run #17: crashed: INFO: task hung in nfc_rfkill_set_block run #18: crashed: INFO: task hung in nfc_rfkill_set_block run #19: crashed: INFO: task hung in nfc_rfkill_set_block representative crash: INFO: task hung in uevent_show, types: [HANG] check whether we can drop unnecessary instrumentation disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed testing commit d7039b844a1c0817aef0c66c2f87cd6b29fbd29e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: b4b3d9c472ac71ce5ab68b58d2fba57f2fde55b32435566ac322abaf54d91269 run #0: crashed: INFO: task hung in rfkill_global_led_trigger_worker run #1: crashed: INFO: task hung in uevent_show run #2: crashed: INFO: task hung in rfkill_unregister run #3: crashed: INFO: task hung in uevent_show run #4: crashed: INFO: task hung in rfkill_unregister run #5: crashed: INFO: task hung in nfc_rfkill_set_block run #6: crashed: INFO: task hung in uevent_show run #7: crashed: INFO: task hung in rfkill_unregister run #8: crashed: INFO: task hung in rfkill_unregister run #9: crashed: INFO: task hung in nfc_rfkill_set_block representative crash: INFO: task hung in rfkill_global_led_trigger_worker, 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=3829 full=7497 leaves diff=2069 split chunks (needed=false): <2069> split chunk #0 of len 2069 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 d7039b844a1c0817aef0c66c2f87cd6b29fbd29e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: df0eaf0e29b8c28e07bb30e63d7ebd4e71b1b8f7a0f5bd7edd41a585326f99dc run #0: crashed: INFO: task hung in genl_rcv_msg run #1: crashed: INFO: task hung in rfkill_unregister run #2: crashed: INFO: task hung in uevent_show run #3: crashed: INFO: task hung in rfkill_unregister run #4: crashed: INFO: task hung in nfc_rfkill_set_block run #5: crashed: INFO: task hung in rfkill_unregister run #6: crashed: INFO: task hung in rfkill_global_led_trigger_worker run #7: crashed: INFO: task hung in nfc_rfkill_set_block run #8: crashed: INFO: task hung in rfkill_global_led_trigger_worker run #9: crashed: INFO: task hung in uevent_show representative crash: INFO: task hung in genl_rcv_msg, 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 d7039b844a1c0817aef0c66c2f87cd6b29fbd29e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 8f1021c12f03e86e5988e1a0ff729b7ab4f3618e5dcb5fba8f50acc0c75d34b8 run #0: crashed: INFO: task hung in rfkill_unregister run #1: crashed: INFO: task hung in rfkill_sync_work run #2: crashed: INFO: task hung in rfkill_unregister run #3: crashed: INFO: task hung in uevent_show run #4: crashed: INFO: task hung in rfkill_global_led_trigger_worker run #5: crashed: INFO: task hung in uevent_show run #6: crashed: INFO: task hung in rfkill_unregister run #7: crashed: INFO: task hung in rfkill_global_led_trigger_worker run #8: crashed: INFO: task hung in rfkill_sync_work run #9: crashed: INFO: task hung in rfkill_unregister representative crash: INFO: task hung in rfkill_unregister, 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 d7039b844a1c0817aef0c66c2f87cd6b29fbd29e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 8240dfdadf142f1a6e2e38bfe51ef23c679cfe3284e55f2d5272d900e8357e3d 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 d7039b844a1c0817aef0c66c2f87cd6b29fbd29e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: bec2088877c48e019dab4f70bef18bac9699245fffd5dd6078f100ecedc794d1 run #0: crashed: INFO: task hung in rfkill_global_led_trigger_worker run #1: crashed: INFO: task hung in rfkill_global_led_trigger_worker run #2: crashed: INFO: task hung in rfkill_unregister run #3: crashed: INFO: task hung in rfkill_unregister run #4: crashed: INFO: task hung in rfkill_global_led_trigger_worker run #5: crashed: INFO: task hung in rfkill_global_led_trigger_worker run #6: crashed: INFO: task hung in uevent_show run #7: crashed: INFO: task hung in uevent_show run #8: crashed: INFO: task hung in rfkill_unregister run #9: crashed: INFO: task hung in rfkill_global_led_trigger_worker representative crash: INFO: task hung in rfkill_global_led_trigger_worker, 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 d7039b844a1c0817aef0c66c2f87cd6b29fbd29e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: f558d8902e23c1e589d996308296f81f4e8eb10cd4de128465299d0ab73a7447 run #0: crashed: INFO: task hung in uevent_show run #1: crashed: INFO: task hung in rfkill_global_led_trigger_worker run #2: crashed: INFO: task hung in rfkill_global_led_trigger_worker run #3: crashed: INFO: task hung in rfkill_sync_work run #4: crashed: INFO: task hung in misc_open run #5: crashed: INFO: task hung in rfkill_unregister run #6: crashed: INFO: task hung in uevent_show run #7: crashed: INFO: task hung in rfkill_global_led_trigger_worker run #8: crashed: INFO: task hung in uevent_show run #9: crashed: INFO: task hung in uevent_show representative crash: INFO: task hung in uevent_show, 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 [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing current HEAD f6e38ae624cf7eb96fb444a8ca2d07caa8d9c8fe testing commit f6e38ae624cf7eb96fb444a8ca2d07caa8d9c8fe gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: f15e23e35e8f69394efb8ee0863b16c18b73b5a7252c4bbfcd0d58410cf91813 run #0: crashed: INFO: task hung in rfkill_unregister run #1: crashed: INFO: task hung in rfkill_global_led_trigger_worker run #2: crashed: INFO: task hung in rfkill_global_led_trigger_worker run #3: crashed: INFO: task hung in rfkill_global_led_trigger_worker run #4: crashed: INFO: task hung in rfkill_fop_open run #5: crashed: INFO: task hung in rfkill_unregister run #6: crashed: INFO: task hung in rfkill_unregister run #7: crashed: INFO: task hung in uevent_show run #8: crashed: INFO: task hung in uevent_show run #9: crashed: INFO: task hung in uevent_show representative crash: INFO: task hung in rfkill_unregister, types: [HANG] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 3h18m43.81866545s (build: 39m16.125023698s, test: 1h8m29.474572139s) crash still not fixed or there were kernel test errors commit msg: Linux 6.1.158 crash: INFO: task hung in rfkill_unregister INFO: task kworker/u4:0:9 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:0 state:D stack:12320 pid:9 ppid:2 flags:0x00004000 Workqueue: netns cleanup_net 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 rfkill_unregister+0x6c/0x100 net/rfkill/core.c:1130 wiphy_unregister+0x149/0x590 net/wireless/core.c:1089 ieee80211_unregister_hw+0x104/0x150 net/mac80211/main.c:1504 mac80211_hwsim_del_radio+0x14e/0x1e0 drivers/net/wireless/mac80211_hwsim.c:4688 hwsim_exit_net+0x255/0x300 drivers/net/wireless/mac80211_hwsim.c:5475 ops_exit_list net/core/net_namespace.c:172 [inline] cleanup_net+0x3a7/0x610 net/core/net_namespace.c:640 process_one_work+0x374/0x780 kernel/workqueue.c:2292 worker_thread+0x30e/0x560 kernel/workqueue.c:2439 kthread+0xfc/0x130 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 INFO: task udevd:1178 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:13080 pid:1178 ppid:1 flags:0x00004002 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 device_lock include/linux/device.h:840 [inline] uevent_show+0xb7/0x180 drivers/base/core.c:2669 dev_attr_show+0x27/0x80 drivers/base/core.c:2372 sysfs_kf_seq_show+0x13d/0x1e0 fs/sysfs/file.c:59 seq_read_iter+0x1f1/0x5e0 fs/seq_file.c:230 call_read_iter include/linux/fs.h:2259 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x1f5/0x420 fs/read_write.c:470 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: 0033:0x7f4890255407 RSP: 002b:00007ffc054671d0 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007f4890167880 RCX: 00007f4890255407 RDX: 0000000000001000 RSI: 000055c2d3fc0fb0 RDI: 000000000000000c RBP: 00007f489039dff0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 000000000000000a R13: 00007f489039dea0 R14: 0000000000000000 R15: 000055c2d3fbf790 INFO: task kworker/1:5:5499 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:5 state:D stack:14800 pid:5499 ppid:2 flags:0x00004000 Workqueue: events rfkill_global_led_trigger_worker 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 rfkill_global_led_trigger_worker+0x15/0x80 net/rfkill/core.c:181 process_one_work+0x374/0x780 kernel/workqueue.c:2292 worker_thread+0x30e/0x560 kernel/workqueue.c:2439 kthread+0xfc/0x130 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 INFO: task syz.6.49:5538 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.6.49 state:D stack:13800 pid:5538 ppid:3272 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 rfkill_unregister+0x6c/0x100 net/rfkill/core.c:1130 nfc_unregister_device+0x6a/0x180 net/nfc/core.c:1167 virtual_ncidev_close+0x55/0x90 drivers/nfc/virtual_ncidev.c:170 __fput+0xee/0x450 fs/file_table.c:320 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+0xa8/0x100 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: 0033:0x7f107eb8e719 RSP: 002b:00007ffdb0ea1e88 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 0000000000017cea RCX: 00007f107eb8e719 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007f107ed47a80 R08: 0000000000000001 R09: 00007ffdb0ea217f R10: 00007f107ea10000 R11: 0000000000000246 R12: 0000000000017d23 R13: 00007ffdb0ea1f90 R14: 0000000000000032 R15: ffffffffffffffff INFO: task syz.3.50:5543 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.50 state:D stack:14392 pid:5543 ppid:3283 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 device_lock include/linux/device.h:840 [inline] nfc_dev_down net/nfc/core.c:143 [inline] nfc_rfkill_set_block+0x3e/0x140 net/nfc/core.c:179 rfkill_set_block+0xad/0x1d0 net/rfkill/core.c:345 rfkill_fop_write+0x2c0/0x320 net/rfkill/core.c:1286 do_loop_readv_writev fs/read_write.c:-1 [inline] do_iter_write+0x21e/0x560 fs/read_write.c:863 vfs_writev+0x222/0x350 fs/read_write.c:934 do_writev+0xc5/0x1b0 fs/read_write.c:977 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: 0033:0x7fd8fbbde719 RSP: 002b:00007fd8fb65f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007fd8fbd95f80 RCX: 00007fd8fbbde719 RDX: 0000000000000007 RSI: 0000000020000440 RDI: 0000000000000003 RBP: 00007fd8fbc5139e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd8fbd95f80 R15: 00007ffc0292a738 Showing all locks held in the system: 4 locks held by kworker/u4:0/9: #0: ffff88810013b538 ((wq_completion)netns){....}-{0:0}, at: process_one_work+0x2f0/0x780 kernel/workqueue.c:2267 #1: ffffc90000053e58 (net_cleanup_work){....}-{0:0}, at: process_one_work+0x2f0/0x780 kernel/workqueue.c:2267 #2: ffffffff83b41e98 (pernet_ops_rwsem){....}-{3:3}, at: cleanup_net+0x55/0x610 net/core/net_namespace.c:594 #3: ffffffff83bd3a00 (rfkill_global_mutex){....}-{3:3}, at: rfkill_unregister+0x6c/0x100 net/rfkill/core.c:1130 1 lock held by rcu_tasks_kthre/12: #0: ffffffff839a7398 (rcu_tasks.tasks_gp_mutex){....}-{3:3}, at: rcu_tasks_one_gp kernel/rcu/tasks.h:517 [inline] #0: ffffffff839a7398 (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: ffffffff839a7158 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #0: ffffffff839a7158 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline] #0: ffffffff839a7158 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x2a/0xf0 kernel/locking/lockdep.c:6513 2 locks held by kworker/0:2/886: #0: ffff888100063138 ((wq_completion)rcu_gp){....}-{0:0}, at: process_one_work+0x2f0/0x780 kernel/workqueue.c:2267 #1: ffffc90002617e58 ((work_completion)(&rew->rew_work)){....}-{0:0}, at: process_one_work+0x2f0/0x780 kernel/workqueue.c:2267 4 locks held by udevd/1178: #0: ffff88810d2df6f8 (&p->lock){....}-{3:3}, at: seq_read_iter+0x47/0x5e0 fs/seq_file.c:182 #1: ffff888108bd1488 (&of->mutex){....}-{3:3}, at: kernfs_seq_start+0x27/0x1a0 fs/kernfs/file.c:172 #2: ffff888121d0e698 (kn->active#5){....}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline] #2: ffff888121d0e698 (kn->active#5){....}-{0:0}, at: kernfs_seq_start+0x4c/0x1a0 fs/kernfs/file.c:173 #3: ffff888123464100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:840 [inline] #3: ffff888123464100 (&dev->mutex){....}-{3:3}, at: uevent_show+0xb7/0x180 drivers/base/core.c:2669 2 locks held by getty/1328: #0: ffff88810e28a898 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x50 drivers/tty/tty_ldisc.c:244 #1: ffffc90002a232f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x231/0xba0 drivers/tty/n_tty.c:2198 2 locks held by syz-executor/5464: #0: ffffffff83a96628 (misc_mtx){....}-{3:3}, at: misc_open+0x2a/0x190 drivers/char/misc.c:107 #1: ffffffff83bd3a00 (rfkill_global_mutex){....}-{3:3}, at: rfkill_fop_open+0x9d/0x2c0 net/rfkill/core.c:1163 1 lock held by syz-executor/5468: #0: ffffffff83a96628 (misc_mtx){....}-{3:3}, at: misc_open+0x2a/0x190 drivers/char/misc.c:107 3 locks held by kworker/1:5/5499: #0: ffff888100062538 ((wq_completion)events){....}-{0:0}, at: process_one_work+0x2f0/0x780 kernel/workqueue.c:2267 #1: ffffc90001c9fe58 ((work_completion)(&rfkill_global_led_trigger_work)){....}-{0:0}, at: process_one_work+0x2f0/0x780 kernel/workqueue.c:2267 #2: ffffffff83bd3a00 (rfkill_global_mutex){....}-{3:3}, at: rfkill_global_led_trigger_worker+0x15/0x80 net/rfkill/core.c:181 2 locks held by syz.6.49/5538: #0: ffff888123464100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:840 [inline] #0: ffff888123464100 (&dev->mutex){....}-{3:3}, at: nfc_unregister_device+0x51/0x180 net/nfc/core.c:1165 #1: ffffffff83bd3a00 (rfkill_global_mutex){....}-{3:3}, at: rfkill_unregister+0x6c/0x100 net/rfkill/core.c:1130 2 locks held by syz.3.50/5543: #0: ffffffff83bd3a00 (rfkill_global_mutex){....}-{3:3}, at: rfkill_fop_write+0xf6/0x320 net/rfkill/core.c:1278 #1: ffff888123464100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:840 [inline] #1: ffff888123464100 (&dev->mutex){....}-{3:3}, at: nfc_dev_down net/nfc/core.c:143 [inline] #1: ffff888123464100 (&dev->mutex){....}-{3:3}, at: nfc_rfkill_set_block+0x3e/0x140 net/nfc/core.c:179 1 lock held by syz-executor/6464: #0: ffffffff83a96628 (misc_mtx){....}-{3:3}, at: misc_open+0x2a/0x190 drivers/char/misc.c:107 1 lock held by syz-executor/6466: #0: ffffffff83a96628 (misc_mtx){....}-{3:3}, at: misc_open+0x2a/0x190 drivers/char/misc.c:107 1 lock held by syz-executor/7216: #0: ffffffff83a96628 (misc_mtx){....}-{3:3}, at: misc_open+0x2a/0x190 drivers/char/misc.c:107 1 lock held by syz-executor/7585: #0: ffffffff83a96628 (misc_mtx){....}-{3:3}, at: misc_open+0x2a/0x190 drivers/char/misc.c:107 1 lock held by syz-executor/7586: #0: ffffffff83a96628 (misc_mtx){....}-{3:3}, at: misc_open+0x2a/0x190 drivers/char/misc.c:107 1 lock held by syz-executor/8327: #0: ffffffff83a96628 (misc_mtx){....}-{3:3}, at: misc_open+0x2a/0x190 drivers/char/misc.c:107 1 lock held by syz-executor/8329: #0: ffffffff83a96628 (misc_mtx){....}-{3:3}, at: misc_open+0x2a/0x190 drivers/char/misc.c:107 1 lock held by syz-executor/9079: #0: ffffffff83a96628 (misc_mtx){....}-{3:3}, at: misc_open+0x2a/0x190 drivers/char/misc.c:107 1 lock held by syz-executor/9448: #0: ffffffff83a96628 (misc_mtx){....}-{3:3}, at: misc_open+0x2a/0x190 drivers/char/misc.c:107 1 lock held by syz-executor/9449: #0: ffffffff83a96628 (misc_mtx){....}-{3:3}, at: misc_open+0x2a/0x190 drivers/char/misc.c:107 1 lock held by syz-executor/10190: #0: ffffffff83a96628 (misc_mtx){....}-{3:3}, at: misc_open+0x2a/0x190 drivers/char/misc.c:107 1 lock held by syz-executor/10191: #0: ffffffff83a96628 (misc_mtx){....}-{3:3}, at: misc_open+0x2a/0x190 drivers/char/misc.c:107 2 locks held by dhcpcd/10938: #0: ffff888121963910 (&sb->s_type->i_mutex_key#10){....}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff888121963910 (&sb->s_type->i_mutex_key#10){....}-{3:3}, at: __sock_release net/socket.c:653 [inline] #0: ffff888121963910 (&sb->s_type->i_mutex_key#10){....}-{3:3}, at: sock_close+0x40/0x100 net/socket.c:1400 #1: ffffffff839a81b8 (rcu_state.exp_mutex){....}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline] #1: ffffffff839a81b8 (rcu_state.exp_mutex){....}-{3:3}, at: synchronize_rcu_expedited+0x298/0x750 kernel/rcu/tree_exp.h:962 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 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+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: 14 Comm: rcu_preempt Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:check_preemption_disabled+0x3/0x110 lib/smp_processor_id.c:13 Code: 44 54 83 e8 2f 01 00 00 65 ff 0d 6c 02 51 7d 5b 41 5e c3 00 00 cc cc 48 c7 c7 ef 6b 64 83 48 c7 c6 b6 44 54 83 eb 00 55 41 57 <41> 56 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 65 RSP: 0018:ffffc9000007bc70 EFLAGS: 00000086 RAX: 0000000000000001 RBX: 0000000000000046 RCX: 0000000076153240 RDX: 0000000000000001 RSI: ffffffff83644320 RDI: ffffffff835ab261 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000001000 R12: ffffffff886c4f80 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055c216a00168 CR3: 000000000383a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline] lock_acquire+0xe0/0x1f0 kernel/locking/lockdep.c:5664 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x4f/0x80 kernel/locking/spinlock.c:162 debug_object_assert_init+0x84/0x1e0 lib/debugobjects.c:887 debug_timer_assert_init kernel/time/timer.c:792 [inline] debug_assert_init kernel/time/timer.c:837 [inline] __try_to_del_timer_sync+0x26/0x120 kernel/time/timer.c:1412 __timer_delete_sync+0xd4/0x140 kernel/time/timer.c:1573 timer_delete_sync kernel/time/timer.c:1628 [inline] del_timer_sync include/linux/timer.h:200 [inline] schedule_timeout+0x13f/0x1b0 kernel/time/timer.c:2168 rcu_gp_fqs_loop+0x185/0x510 kernel/rcu/tree.c:1706 rcu_gp_kthread+0x18/0x100 kernel/rcu/tree.c:1905 kthread+0xfc/0x130 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295