ci2 starts bisection 2025-10-01 13:44:53.884237502 +0000 UTC m=+11509.779917720
bisecting fixing commit since 1c700860e8bc079c5c71d73c55e51865d273943c
building syzkaller on 6b6b5f21aadcc3fc3ccd91da0b782a4307229d70
ensuring issue is reproducible on original commit 1c700860e8bc079c5c71d73c55e51865d273943c

testing commit 1c700860e8bc079c5c71d73c55e51865d273943c gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: e63e5a4efb421c543d6be38e5666a2cce64f31ac3a95479a30f323712a6afb65
run #0: crashed: INFO: rcu detected stall in clock_adjtime
run #1: crashed: INFO: rcu detected stall in clock_adjtime
run #2: crashed: INFO: rcu detected stall in clock_adjtime
run #3: crashed: INFO: rcu detected stall in clock_adjtime
run #4: crashed: INFO: rcu detected stall in clock_adjtime
run #5: crashed: INFO: rcu detected stall in clock_adjtime
run #6: crashed: INFO: rcu detected stall in ieee80211_iface_work
run #7: crashed: INFO: rcu detected stall in clock_adjtime
run #8: crashed: INFO: rcu detected stall in clock_adjtime
run #9: crashed: INFO: rcu detected stall in clock_adjtime
run #10: crashed: INFO: rcu detected stall in clock_adjtime
run #11: crashed: INFO: rcu detected stall in cleanup_net
run #12: crashed: INFO: rcu detected stall in clock_adjtime
run #13: crashed: INFO: rcu detected stall in clock_adjtime
run #14: crashed: INFO: rcu detected stall in clock_adjtime
run #15: crashed: INFO: rcu detected stall in clock_adjtime
run #16: crashed: INFO: rcu detected stall in clock_adjtime
run #17: crashed: INFO: rcu detected stall in clock_adjtime
run #18: crashed: INFO: rcu detected stall in clock_adjtime
run #19: crashed: INFO: rcu detected stall in clock_adjtime
representative crash: INFO: rcu detected stall in clock_adjtime, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed
testing commit 1c700860e8bc079c5c71d73c55e51865d273943c gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 3f341e7b6c829bff20ab00724f1dec3166b707ff703f3ce67d25fcdd7bd18fb5
run #0: crashed: INFO: rcu detected stall in process_one_work
run #1: crashed: INFO: rcu detected stall in worker_thread
run #2: crashed: INFO: rcu detected stall in process_one_work
run #3: crashed: INFO: rcu detected stall in clock_adjtime
run #4: crashed: INFO: rcu detected stall in process_one_work
run #5: crashed: INFO: rcu detected stall in do_idle
run #6: crashed: INFO: rcu detected stall in worker_thread
run #7: crashed: INFO: rcu detected stall in clock_adjtime
run #8: crashed: INFO: rcu detected stall in process_one_work
run #9: crashed: INFO: rcu detected stall in futex
representative crash: INFO: rcu detected stall in process_one_work, types: [HANG]
the bug reproduces without the instrumentation
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
kconfig minimization: base=3707 full=7306 leaves diff=2039
split chunks (needed=false): <2039>
split chunk #0 of len 2039 into 5 parts
testing without sub-chunk 1/5
disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed
testing commit 1c700860e8bc079c5c71d73c55e51865d273943c gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 8170fb77f0809b95f066178e156e8032e5ab236580452762f9d1ea458aaff795
run #0: crashed: INFO: rcu detected stall in clock_adjtime
run #1: crashed: INFO: rcu detected stall in clock_adjtime
run #2: crashed: INFO: rcu detected stall in worker_thread
run #3: crashed: INFO: rcu detected stall in process_one_work
run #4: crashed: INFO: rcu detected stall in worker_thread
run #5: crashed: INFO: rcu detected stall in clock_adjtime
run #6: crashed: INFO: rcu detected stall in worker_thread
run #7: crashed: INFO: rcu detected stall in process_one_work
run #8: crashed: INFO: rcu detected stall in process_one_work
run #9: crashed: INFO: rcu detected stall in process_one_work
representative crash: INFO: rcu detected stall in clock_adjtime, 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 1c700860e8bc079c5c71d73c55e51865d273943c gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: de2d398b36860a48a8bd78652e8eee451f4dabd8a2256857b07be72a0723f853
run #0: crashed: INFO: rcu detected stall in process_one_work
run #1: crashed: INFO: rcu detected stall in process_one_work
run #2: crashed: INFO: rcu detected stall in clock_adjtime
run #3: crashed: INFO: rcu detected stall in process_one_work
run #4: crashed: INFO: rcu detected stall in process_one_work
run #5: crashed: INFO: rcu detected stall in process_one_work
run #6: crashed: INFO: rcu detected stall in clock_adjtime
run #7: crashed: INFO: rcu detected stall in clock_adjtime
run #8: crashed: INFO: rcu detected stall in process_one_work
run #9: crashed: INFO: rcu detected stall in clock_adjtime
representative crash: INFO: rcu detected stall in process_one_work, types: [HANG]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit 1c700860e8bc079c5c71d73c55e51865d273943c gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 60fa2760518dc9b588e09c9092546f51f19fd38d1fb1bc352374a0bf65dd1246
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 1c700860e8bc079c5c71d73c55e51865d273943c gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: b028ef0156be2de39daa80ae29f551e5b44852ea189bce4eba172df001eae68c
run #0: crashed: INFO: rcu detected stall in process_one_work
run #1: crashed: INFO: rcu detected stall in process_one_work
run #2: crashed: INFO: rcu detected stall in process_one_work
run #3: crashed: INFO: rcu detected stall in process_one_work
run #4: crashed: INFO: rcu detected stall in process_one_work
run #5: crashed: INFO: rcu detected stall in process_one_work
run #6: crashed: INFO: rcu detected stall in netlink_release
run #7: crashed: INFO: rcu detected stall in smp_call_function
run #8: crashed: INFO: rcu detected stall in clock_adjtime
run #9: crashed: INFO: rcu detected stall in process_one_work
representative crash: INFO: rcu detected stall in process_one_work, types: [HANG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed
testing commit 1c700860e8bc079c5c71d73c55e51865d273943c gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: cc0dbcd89fea653b21cc0152bf687cfcfa30fe4fdc3cc95d4a0cba94f30c71cf
run #0: crashed: INFO: rcu detected stall in process_one_work
run #1: crashed: INFO: rcu detected stall in process_one_work
run #2: crashed: INFO: rcu detected stall in process_one_work
run #3: crashed: INFO: rcu detected stall in clock_adjtime
run #4: crashed: INFO: rcu detected stall in clock_adjtime
run #5: crashed: INFO: rcu detected stall in process_one_work
run #6: crashed: INFO: rcu detected stall in futex
run #7: crashed: INFO: rcu detected stall in clock_adjtime
run #8: crashed: INFO: rcu detected stall in process_one_work
run #9: crashed: INFO: rcu detected stall in worker_thread
representative crash: INFO: rcu detected stall in process_one_work, types: [HANG]
the chunk can be dropped
minimized to 408 configs; suspects: [AX25 BRIDGE BRIDGE_NETFILTER CAN CFG80211 CHECKPOINT_RESTORE DVB_CORE FB FSCACHE HAMRADIO HSR INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_USER_ACCESS INPUT_JOYSTICK INPUT_MOUSE IP6_NF_RAW IPV6_MULTIPLE_TABLES IP_NF_RAW IP_SET IP_VS 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_INTEL KVM_MMIO KVM_VFIO KVM_XEN KVM_XFER_TO_GUEST_WORK L2TP L2TP_ETH L2TP_IP L2TP_V3 LAPB LAPBETHER LDM_PARTITION LEDS_TRIGGER_AUDIO LEGACY_PTYS LIBNVDIMM LINEAR_RANGES LLC LLC2 LOGIG940_FF LOGIRUMBLEPAD2_FF LOGO LOGO_LINUX_MONO LOGO_LINUX_VGA16 LPC_ICH LWTUNNEL LWTUNNEL_BPF LZ4HC_COMPRESS LZ4_COMPRESS MAC80211 MAC80211_DEBUGFS MAC80211_HAS_RC MAC80211_HWSIM MAC80211_MESH MAC80211_RC_DEFAULT_MINSTREL MAC80211_RC_MINSTREL MACSEC MACVLAN MACVTAP MAC_PARTITION MAPPING_DIRTY_HELPERS MDIO_MVUSB MD_LINEAR MD_MULTIPATH MD_RAID0 MD_RAID1 MD_RAID10 MD_RAID456 MEDIA_ANALOG_TV_SUPPORT MEDIA_ATTACH MEDIA_CONTROLLER MEDIA_CONTROLLER_DVB MEDIA_CONTROLLER_REQUEST_API MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_SUPPORT_FILTER MEDIA_TUNER MEDIA_TUNER_MSI001 MEDIA_TUNER_XC2028 MEDIA_TUNER_XC5000 MEMORY_BALLOON MEMORY_HOTPLUG MEMORY_HOTPLUG_DEFAULT_ONLINE MEMORY_ISOLATION MEMREGION MEMSTICK MEMSTICK_REALTEK_USB MEM_SOFT_DIRTY MFD_CORE MFD_SYSCON MHI_BUS MHI_WWAN_CTRL MHP_MEMMAP_ON_MEMORY MICROCHIP_PHY MINIX_FS MINIX_SUBPARTITION MISC_RTSX MISC_RTSX_USB MISDN MISDN_DSP MISDN_HFCUSB MISDN_L1OIP MKISS MLX4_CORE MLX4_INFINIBAND MMC MMC_REALTEK_USB MMC_USHC MMC_VUB300 MMU_NOTIFIER MODULE_SRCVERSION_ALL MODVERSIONS MOST MOST_USB_HDM MOUSE_APPLETOUCH MOUSE_BCM5974 MOUSE_PS2 MOUSE_PS2_ALPS MOUSE_PS2_BYD MOUSE_PS2_CYPRESS MOUSE_PS2_FOCALTECH MOUSE_PS2_LIFEBOOK MOUSE_PS2_LOGIPS2PP MOUSE_PS2_SMBUS MOUSE_PS2_SYNAPTICS MOUSE_PS2_SYNAPTICS_SMBUS MOUSE_PS2_TRACKPOINT MOUSE_SYNAPTICS_USB MPLS MPLS_IPTUNNEL MPLS_ROUTING MPTCP MPTCP_IPV6 MRP MTD MTD_BLKDEVS MTD_BLOCK MTD_BLOCK2MTD MTD_CFI_I1 MTD_CFI_I2 MTD_MAP_BANK_WIDTH_1 MTD_MAP_BANK_WIDTH_2 MTD_MAP_BANK_WIDTH_4 MTD_MTDRAM MTD_PHRAM MTD_SLRAM MUSB_PIO_ONLY ND_BLK ND_BTT ND_CLAIM ND_PFN NETDEVSIM NETFILTER_ADVANCED NETFILTER_FAMILY_ARP NETFILTER_FAMILY_BRIDGE NETFILTER_NETLINK_ACCT NETFILTER_NETLINK_GLUE_CT NETFILTER_NETLINK_OSF NETFILTER_NETLINK_QUEUE NETFILTER_SYNPROXY NETFILTER_XT_CONNMARK NETFILTER_XT_MATCH_BPF NETFILTER_XT_MATCH_CGROUP NETFILTER_XT_MATCH_CLUSTER NETFILTER_XT_MATCH_COMMENT NETFILTER_XT_MATCH_CONNBYTES NETFILTER_XT_MATCH_CONNLABEL NETFILTER_XT_MATCH_CONNLIMIT NETFILTER_XT_MATCH_CONNMARK NETFILTER_XT_MATCH_CPU NETFILTER_XT_MATCH_DCCP NETFILTER_XT_MATCH_DEVGROUP NETFILTER_XT_MATCH_DSCP NETFILTER_XT_MATCH_ECN NETFILTER_XT_MATCH_ESP NETFILTER_XT_MATCH_HASHLIMIT NETFILTER_XT_MATCH_HELPER NETFILTER_XT_MATCH_HL NETFILTER_XT_MATCH_IPCOMP NETFILTER_XT_MATCH_IPRANGE NETFILTER_XT_MATCH_IPVS NETFILTER_XT_MATCH_L2TP NETFILTER_XT_MATCH_LENGTH NETFILTER_XT_MATCH_LIMIT NETFILTER_XT_MATCH_MAC NETFILTER_XT_MATCH_MARK NETFILTER_XT_MATCH_MULTIPORT NETFILTER_XT_MATCH_NFACCT NETFILTER_XT_MATCH_OSF NETFILTER_XT_MATCH_OWNER NETFILTER_XT_MATCH_PHYSDEV NETFILTER_XT_MATCH_PKTTYPE NETFILTER_XT_MATCH_QUOTA NETFILTER_XT_MATCH_RATEEST NETFILTER_XT_MATCH_REALM NETFILTER_XT_MATCH_RECENT NETFILTER_XT_MATCH_SCTP NETFILTER_XT_MATCH_SOCKET NETFILTER_XT_MATCH_STATISTIC NETFILTER_XT_MATCH_STRING NETFILTER_XT_MATCH_TCPMSS NETFILTER_XT_MATCH_TIME NETFILTER_XT_MATCH_U32 NETFILTER_XT_SET NETFILTER_XT_TARGET_AUDIT NETFILTER_XT_TARGET_CHECKSUM NETFILTER_XT_TARGET_CLASSIFY NETFILTER_XT_TARGET_CONNMARK NETFILTER_XT_TARGET_CT NETFILTER_XT_TARGET_DSCP NETFILTER_XT_TARGET_HL NETFILTER_XT_TARGET_HMARK NETFILTER_XT_TARGET_IDLETIMER NETFILTER_XT_TARGET_LED NETFILTER_XT_TARGET_MARK NETFILTER_XT_TARGET_NETMAP NETFILTER_XT_TARGET_NFQUEUE NETFILTER_XT_TARGET_NOTRACK NETFILTER_XT_TARGET_RATEEST NETFILTER_XT_TARGET_REDIRECT NETFILTER_XT_TARGET_TCPOPTSTRIP NETFILTER_XT_TARGET_TEE NETFILTER_XT_TARGET_TPROXY NETFILTER_XT_TARGET_TRACE NETFS_SUPPORT NETLABEL NETLINK_DIAG NETROM NET_9P_RDMA NET_ACT_BPF NET_ACT_CONNMARK NET_ACT_CSUM NET_ACT_CT NET_ACT_CTINFO NET_ACT_GATE NET_ACT_IFE NET_ACT_IPT NET_ACT_MPLS NET_ACT_NAT NET_ACT_PEDIT NET_ACT_POLICE NET_ACT_SAMPLE NET_ACT_SIMP NET_ACT_SKBEDIT NET_ACT_SKBMOD NET_ACT_TUNNEL_KEY NET_ACT_VLAN NET_CLS_BASIC NET_CLS_BPF NET_CLS_CGROUP NET_CLS_FLOW NET_CLS_FLOWER NET_CLS_FW NET_CLS_MATCHALL NET_CLS_ROUTE4 NET_DEVLINK NET_DROP_MONITOR NET_DSA NET_DSA_TAG_BRCM NET_DSA_TAG_BRCM_COMMON NET_DSA_TAG_BRCM_PREPEND NET_DSA_TAG_MTK NET_DSA_TAG_QCA NET_DSA_TAG_RTL4_A NET_EGRESS NET_EMATCH_CANID NET_EMATCH_CMP NET_EMATCH_IPSET NET_EMATCH_IPT NET_EMATCH_META NET_EMATCH_NBYTE NET_EMATCH_TEXT NET_EMATCH_U32 NET_FC NET_FOU NET_FOU_IP_TUNNELS NET_IFE NET_IFE_SKBMARK NET_IFE_SKBPRIO NET_IFE_SKBTCINDEX NET_IPGRE NET_IPGRE_BROADCAST NET_IPGRE_DEMUX NET_IPIP NET_IPVTI NET_KEY NET_KEY_MIGRATE NET_L3_MASTER_DEV NET_MPLS_GSO NET_NCSI NET_NSH NET_REDIRECT NET_SCH_CAKE NET_SCH_CBS NET_SCH_CHOKE NET_SCH_CODEL NET_SCH_DRR NET_SCH_ETF NET_SCH_ETS NET_SCH_FQ NET_SCH_FQ_CODEL NET_SCH_FQ_PIE NET_SCH_GRED NET_SCH_HFSC NET_SCH_HHF NET_SCH_HTB NET_SCH_INGRESS NET_SCH_MQPRIO NET_SCH_MULTIQ NET_SCH_NETEM NET_SCH_PIE NET_SCH_PLUG NET_SCH_PRIO NET_SCH_QFQ NET_SCH_RED NET_SCH_SFB NET_SCH_SFQ NET_SCH_SKBPRIO NET_SCH_TAPRIO NET_SCH_TBF NET_SCH_TEQL NET_SOCK_MSG NET_SWITCHDEV NET_TC_SKB_EXT NET_TEAM NET_TEAM_MODE_ACTIVEBACKUP NET_TEAM_MODE_BROADCAST NET_TEAM_MODE_LOADBALANCE NET_TEAM_MODE_RANDOM NET_TEAM_MODE_ROUNDROBIN NET_UDP_TUNNEL NET_VRF NFC NFC_DIGITAL NFC_FDP NFC_HCI NFC_MRVL NFC_MRVL_USB NFC_NCI NFC_NCI_UART NFC_PN533 NFC_PN533_USB NFC_PORT100 NFC_SHDLC NFC_SIM NFC_VIRTUAL_NCI NFSD NFSD_BLOCKLAYOUT NFSD_FLEXFILELAYOUT NFSD_PNFS NFSD_SCSILAYOUT NFSD_V3_ACL NFSD_V4 NFSD_V4_2_INTER_SSC NFSD_V4_SECURITY_LABEL NFS_FSCACHE NFS_V4_1 NFS_V4_2 NFS_V4_2_READ_PLUS NFS_V4_2_SSC_HELPER NFS_V4_SECURITY_LABEL NFT_BRIDGE_META NFT_BRIDGE_REJECT NFT_COMPAT NFT_CONNLIMIT NFT_COUNTER NFT_CT NFT_DUP_IPV4 NFT_DUP_IPV6 NFT_DUP_NETDEV NFT_FIB NFT_FIB_INET NFT_FIB_IPV4 NFT_FIB_IPV6 NFT_FIB_NETDEV NFT_FLOW_OFFLOAD NFT_HASH NFT_LIMIT NFT_LOG NFT_MASQ NFT_NAT NFT_NUMGEN NFT_OBJREF NFT_OSF NFT_QUEUE NFT_QUOTA NFT_REDIR NFT_REJECT NFT_REJECT_INET NFT_REJECT_IPV4 NFT_REJECT_IPV6 NFT_REJECT_NETDEV NFT_SOCKET NFT_SYNPROXY NFT_TPROXY NFT_TUNNEL NFT_XFRM NF_CONNTRACK_AMANDA NF_CONNTRACK_BRIDGE NF_CONNTRACK_BROADCAST NF_CONNTRACK_EVENTS NF_CONNTRACK_H323 NF_CONNTRACK_LABELS NF_CONNTRACK_MARK NF_CONNTRACK_NETBIOS_NS NF_CONNTRACK_PPTP NF_CONNTRACK_SANE NF_CONNTRACK_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_FLOW_TABLE_IPV4 NF_FLOW_TABLE_IPV6 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 NLMON NLS_CODEPAGE_1250 NLS_CODEPAGE_1251 NLS_CODEPAGE_737 NLS_CODEPAGE_775 NLS_CODEPAGE_850 NLS_CODEPAGE_852 NLS_CODEPAGE_855 NLS_CODEPAGE_857 NLS_CODEPAGE_860 NLS_CODEPAGE_861 NLS_CODEPAGE_862 NLS_CODEPAGE_863 NLS_CODEPAGE_864 NLS_CODEPAGE_865 NLS_CODEPAGE_866 PARTITION_ADVANCED PSAMPLE RC_CORE RC_DEVICES RFKILL SPI USB_GADGET USB_MUSB_HDRC VIDEO_DEV VIDEO_V4L2 WAN WATCH_QUEUE WIRELESS WLAN WWAN X25]
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing current HEAD 43bb85222e53926decace01ce6584ca88e09a0a9
testing commit 43bb85222e53926decace01ce6584ca88e09a0a9 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: d6537f73d14038aa9ffe6c02d4f7e3e9d2c64d6918cf88f79a4914138887f72f
run #0: crashed: INFO: rcu detected stall in clock_adjtime
run #1: crashed: INFO: rcu detected stall in process_one_work
run #2: crashed: INFO: rcu detected stall in process_one_work
run #3: crashed: INFO: rcu detected stall in clock_adjtime
run #4: crashed: INFO: rcu detected stall in clock_adjtime
run #5: crashed: INFO: rcu detected stall in clock_adjtime
run #6: crashed: INFO: rcu detected stall in clock_adjtime
run #7: crashed: INFO: rcu detected stall in clock_adjtime
run #8: crashed: INFO: rcu detected stall in clock_adjtime
run #9: crashed: INFO: rcu detected stall in process_one_work
representative crash: INFO: rcu detected stall in clock_adjtime, types: [HANG]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 1h27m57.142051687s (build: 27m0.062338903s, test: 59m7.036974187s)
crash still not fixed or there were kernel test errors
commit msg: Linux 5.15.193
crash: INFO: rcu detected stall in clock_adjtime
rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=eed/1/0x4000000000000000 softirq=6466/6466 fqs=0 
	(detected by 0, t=10002 jiffies, g=4205, q=432)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4213 Comm: syz.2.16 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:__lock_acquire.constprop.0+0xa8/0x3e0 kernel/locking/lockdep.c:4920
Code: aa aa aa aa aa aa aa 48 2d c0 f3 3e 84 49 8d ad 30 0a 00 00 48 c1 f8 06 48 0f af c2 8b 14 24 48 89 d1 48 8d 14 92 48 c1 e2 03 <85> c9 74 1d 4c 8d 44 15 d8 41 0f b7 48 20 81 e1 ff 1f 00 00 39 c1
RSP: 0018:ffffc900000b8e10 EFLAGS: 00000046
RAX: 0000000000000015 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff837a1100
RBP: ffff888101b9c0b0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: ffffc900000b8ff8 R12: 0000000000000000
R13: ffff888101b9b680 R14: 0000000000000002 R15: 0000000000000000
FS:  00007f3d68d0d6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000600 CR3: 00000001102ac000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lock_acquire kernel/locking/lockdep.c:5623 [inline]
 lock_acquire+0x93/0x130 kernel/locking/lockdep.c:5588
 rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
 rcu_read_lock include/linux/rcupdate.h:739 [inline]
 advance_sched+0x17d/0x250 net/sched/sch_taprio.c:769
 __run_hrtimer kernel/time/hrtimer.c:1690 [inline]
 __hrtimer_run_queues+0x1db/0x4a0 kernel/time/hrtimer.c:1754
 hrtimer_interrupt+0x124/0x2a0 kernel/time/hrtimer.c:1816
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x63/0x100 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x6d/0x90 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:205
Code: 89 0c ed 80 62 22 88 48 89 70 18 5b 5d 41 5c 41 5d c3 48 c7 c0 f4 ff ff ff eb 9a 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <65> 48 8b 14 25 80 af 01 00 65 8b 05 e0 98 d8 7e a9 00 01 ff 00 48
RSP: 0018:ffffc900019dbd28 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000200 RCX: ffffffff8119e9ca
RDX: ffff888101b9b680 RSI: ffffffff8119e9d4 RDI: 0000000000000007
RBP: 0000000000000008 R08: 0000000000000000 R09: ffff888101b9b768
R10: 0000000000000000 R11: 0000000000320aeb R12: 0000000000000000
R13: 0000000000000001 R14: ffff888100062e00 R15: 0000000000000000
 queue_work_on+0x7a/0xb0 kernel/workqueue.c:1564
 queue_work include/linux/workqueue.h:512 [inline]
 ntp_notify_cmos_timer+0x5b/0x70 kernel/time/ntp.c:671
 do_adjtimex+0x56c/0x650 kernel/time/timekeeping.c:2464
 do_clock_adjtime kernel/time/posix-timers.c:1155 [inline]
 __do_sys_clock_adjtime+0xc8/0x190 kernel/time/posix-timers.c:1167
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x33/0x80 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f3d6929c929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3d68d0d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007f3d694c3fa0 RCX: 00007f3d6929c929
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000000000
RBP: 00007f3d6931eb39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f3d694c3fa0 R15: 00007ffcaf150d18
 </TASK>
rcu: rcu_sched kthread timer wakeup didn't happen for 10001 jiffies! g4205 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=1286
rcu: rcu_sched kthread starved for 10002 jiffies! g4205 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
rcu: 	Unless rcu_sched kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_sched       state:I stack:14312 pid:   12 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x2c8/0x7d0 kernel/sched/core.c:6395
 schedule+0x53/0x90 kernel/sched/core.c:6478
 schedule_timeout+0xde/0x170 kernel/time/timer.c:1914
 rcu_gp_fqs_loop+0xe2/0x320 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0x77/0xe0 kernel/rcu/tree.c:2145
 kthread+0x13a/0x160 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4213 Comm: syz.2.16 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:rb_add_cached include/linux/rbtree.h:172 [inline]
RIP: 0010:timerqueue_add+0x18/0x110 lib/timerqueue.c:40
Code: 10 84 d2 75 ec c3 cc cc cc cc cc cc cc cc cc cc cc cc 41 57 49 89 ff 41 56 41 55 49 89 f5 41 54 55 53 e8 9b 34 91 ff 49 8b 1f <48> 85 db 0f 84 ad 00 00 00 e8 8a 34 91 ff 41 be 01 00 00 00 4d 8b
RSP: 0018:ffffc900000b8eb0 EFLAGS: 00000046
RAX: 0000000000010000 RBX: 0000000000000000 RCX: 0000000000000001
RDX: ffff888101b9b680 RSI: ffffffff8197e1b5 RDI: ffff888237d1ded0
RBP: ffff88810023ab40 R08: 000000000008005b R09: 0000000000000000
R10: 0000000000000000 R11: ffffc900000b8ff8 R12: 0000000000000001
R13: ffff88810023ab40 R14: ffff888237d1dd80 R15: ffff888237d1ded0
FS:  00007f3d68d0d6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000600 CR3: 00000001102ac000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 enqueue_hrtimer+0x7c/0xf0 kernel/time/hrtimer.c:1082
 __run_hrtimer kernel/time/hrtimer.c:1707 [inline]
 __hrtimer_run_queues+0x492/0x4a0 kernel/time/hrtimer.c:1754
 hrtimer_interrupt+0x124/0x2a0 kernel/time/hrtimer.c:1816
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x63/0x100 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x6d/0x90 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:205
Code: 89 0c ed 80 62 22 88 48 89 70 18 5b 5d 41 5c 41 5d c3 48 c7 c0 f4 ff ff ff eb 9a 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <65> 48 8b 14 25 80 af 01 00 65 8b 05 e0 98 d8 7e a9 00 01 ff 00 48
RSP: 0018:ffffc900019dbd28 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000200 RCX: ffffffff8119e9ca
RDX: ffff888101b9b680 RSI: ffffffff8119e9d4 RDI: 0000000000000007
RBP: 0000000000000008 R08: 0000000000000000 R09: ffff888101b9b768
R10: 0000000000000000 R11: 0000000000320aeb R12: 0000000000000000
R13: 0000000000000001 R14: ffff888100062e00 R15: 0000000000000000
 queue_work_on+0x7a/0xb0 kernel/workqueue.c:1564
 queue_work include/linux/workqueue.h:512 [inline]
 ntp_notify_cmos_timer+0x5b/0x70 kernel/time/ntp.c:671
 do_adjtimex+0x56c/0x650 kernel/time/timekeeping.c:2464
 do_clock_adjtime kernel/time/posix-timers.c:1155 [inline]
 __do_sys_clock_adjtime+0xc8/0x190 kernel/time/posix-timers.c:1167
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x33/0x80 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f3d6929c929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3d68d0d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007f3d694c3fa0 RCX: 00007f3d6929c929
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000000000
RBP: 00007f3d6931eb39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f3d694c3fa0 R15: 00007ffcaf150d18
 </TASK>