ci2 starts bisection 2024-10-16 04:44:53.87063971 +0000 UTC m=+25753.722775572
bisecting fixing commit since d93fa2c78854d25ed4b67ac87f1c3c264d8b27fb
building syzkaller on 28c42cffb02cb3eb71fa7649e68149ca1818ff83
ensuring issue is reproducible on original commit d93fa2c78854d25ed4b67ac87f1c3c264d8b27fb

testing commit d93fa2c78854d25ed4b67ac87f1c3c264d8b27fb gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 549531106d571d187c1f8f0a5d20bab800ab9c1ba8513fd1eaa9a1f640ca85f0
run #0: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode
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 syscall_exit_to_user_mode
run #4: crashed: INFO: rcu detected stall in sys_pipe2
run #5: crashed: INFO: rcu detected stall in clock_adjtime
run #6: crashed: INFO: rcu detected stall in corrupted
run #7: crashed: INFO: rcu detected stall in clock_adjtime
run #8: crashed: INFO: rcu detected stall in sys_exit_group
run #9: crashed: INFO: rcu detected stall in clock_adjtime
run #10: crashed: INFO: rcu detected stall in process_one_work
run #11: crashed: INFO: rcu detected stall in sync_hw_clock
run #12: crashed: INFO: rcu detected stall in sync_hw_clock
run #13: crashed: INFO: rcu detected stall in clock_adjtime
run #14: crashed: INFO: rcu detected stall in process_one_work
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 sync_hw_clock
run #18: crashed: INFO: rcu detected stall in lock_is_held_type
run #19: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode
representative crash: INFO: rcu detected stall in syscall_exit_to_user_mode, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit d93fa2c78854d25ed4b67ac87f1c3c264d8b27fb gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 4e2075407202c0556919c987eca25454e5f811a2d3a0fb570dff0cd8089ba791
run #0: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode
run #1: crashed: INFO: rcu detected stall in do_idle
run #2: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode
run #3: crashed: INFO: rcu detected stall in sys_exit_group
run #4: crashed: INFO: rcu detected stall in sys_symlinkat
run #5: crashed: INFO: rcu detected stall in sys_umount
run #6: crashed: INFO: rcu detected stall in corrupted
run #7: crashed: INFO: rcu detected stall in sys_execve
run #8: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode
run #9: crashed: INFO: rcu detected stall in corrupted
representative crash: INFO: rcu detected stall in syscall_exit_to_user_mode, types: [HANG]
the bug reproduces without the instrumentation
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
kconfig minimization: base=3706 full=7267 leaves diff=1983
split chunks (needed=false): <1983>
split chunk #0 of len 1983 into 5 parts
testing without sub-chunk 1/5
disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed
testing commit d93fa2c78854d25ed4b67ac87f1c3c264d8b27fb gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: dfc87bcff6dcd6b0331f243c66605e125b0e4dc3e26e126dac8d99d6c7a024d9
run #0: crashed: INFO: rcu detected stall in clone3
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: crashed: INFO: rcu detected stall in corrupted
run #3: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode
run #4: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode
run #5: crashed: INFO: rcu detected stall in sys_unlink
run #6: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode
run #7: crashed: INFO: rcu detected stall in corrupted
run #8: crashed: INFO: rcu detected stall in sys_readlink
run #9: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode
representative crash: INFO: rcu detected stall in clone3, types: [HANG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed
testing commit d93fa2c78854d25ed4b67ac87f1c3c264d8b27fb gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: cdcb7ff540bde5c5798e58d2d41131a5077b80ed1f62cb2b3bb9b91953b29285
run #0: crashed: INFO: rcu detected stall in do_idle
run #1: crashed: INFO: rcu detected stall in sys_execve
run #2: crashed: INFO: rcu detected stall in do_idle
run #3: crashed: INFO: rcu detected stall in clone
run #4: crashed: INFO: rcu detected stall in corrupted
run #5: crashed: INFO: rcu detected stall in schedule_timeout
run #6: crashed: INFO: rcu detected stall in corrupted
run #7: crashed: INFO: rcu detected stall in clone
run #8: crashed: INFO: rcu detected stall in corrupted
run #9: crashed: INFO: rcu detected stall in syscall_enter_from_user_mode
representative crash: INFO: rcu detected stall in do_idle, types: [HANG]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit d93fa2c78854d25ed4b67ac87f1c3c264d8b27fb gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: dc360b1b2084b46f89abda9425c41345c5c74443d85e8cbae840e05a1b2eec99
all runs: OK
false negative chance: 0.000
testing without sub-chunk 4/5
disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed
testing commit d93fa2c78854d25ed4b67ac87f1c3c264d8b27fb gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: bfd051fa76b4ad1be1fa79ecd085719b9f7b501be0bb6f424b63196390ff688c
run #0: crashed: INFO: rcu detected stall in corrupted
run #1: crashed: INFO: rcu detected stall in try_module_get
run #2: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode
run #3: crashed: INFO: rcu detected stall in sys_openat
run #4: crashed: INFO: rcu detected stall in do_idle
run #5: crashed: INFO: rcu detected stall in corrupted
run #6: crashed: INFO: rcu detected stall in do_idle
run #7: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode
run #8: crashed: INFO: rcu detected stall in pipe_read
run #9: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode
representative crash: INFO: rcu detected stall in corrupted, types: [HANG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit d93fa2c78854d25ed4b67ac87f1c3c264d8b27fb gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: f82cb638c9494e62e656c7964c4b75d879ab92781e79688d52b83ba48264a24a
run #0: crashed: INFO: rcu detected stall in shmem_file_read_iter
run #1: crashed: INFO: rcu detected stall in do_idle
run #2: crashed: INFO: rcu detected stall in do_idle
run #3: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode
run #4: crashed: INFO: rcu detected stall in newfstatat
run #5: crashed: INFO: rcu detected stall in sys_unlink
run #6: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode
run #7: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode
run #8: crashed: INFO: rcu detected stall in sys_inotify_rm_watch
run #9: crashed: INFO: rcu detected stall in rtc_timer_do_work
representative crash: INFO: rcu detected stall in shmem_file_read_iter, types: [HANG]
the chunk can be dropped
minimized to 397 configs; suspects: [ATM 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 ISDN 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_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 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 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_ATM NET_SCH_CAKE NET_SCH_CBQ NET_SCH_CBS NET_SCH_CHOKE NET_SCH_CODEL NET_SCH_DRR NET_SCH_DSMARK 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_V2_ACL NFSD_V3 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 PARTITION_ADVANCED PSAMPLE RFKILL SPI USB_GADGET USB_MUSB_HDRC VIDEO_DEV VIDEO_V4L2 WAN WATCH_QUEUE WIRELESS WLAN WWAN X25 X86_X32]
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing current HEAD 3a5928702e7120f83f703fd566082bfb59f1a57e
testing commit 3a5928702e7120f83f703fd566082bfb59f1a57e gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 26e17b4218151812e1729b4f672ccb84727c889de16ecddd1a16e636b098d2f0
run #0: crashed: INFO: rcu detected stall in schedule_timeout
run #1: crashed: INFO: rcu detected stall in sys_socket
run #2: crashed: INFO: rcu detected stall in packet_release
run #3: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode
run #4: crashed: INFO: rcu detected stall in sys_exit_group
run #5: crashed: INFO: rcu detected stall in corrupted
run #6: crashed: INFO: rcu detected stall in corrupted
run #7: crashed: INFO: rcu detected stall in do_idle
run #8: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode
run #9: crashed: INFO: rcu detected stall in do_idle
representative crash: INFO: rcu detected stall in schedule_timeout, types: [HANG]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 2h25m16.269416579s (build: 31m21.088003082s, test: 1h49m48.425581683s)
crash still not fixed or there were kernel test errors
commit msg: Linux 5.15.167
crash: INFO: rcu detected stall in schedule_timeout
rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=03b/1/0x4000000000000000 softirq=4446/4446 fqs=0 
	(detected by 1, t=10002 jiffies, g=1841, q=3433)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1033 Comm: kworker/0:3 Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: rcu_gp wait_rcu_exp_gp
RIP: 0010:__lock_acquire.constprop.0+0x1b0/0x3e0 kernel/locking/lockdep.c:5008
Code: 0f 8d 45 01 00 00 49 63 c7 48 89 de 48 8d 04 80 49 8d 3c c6 e8 c1 07 6f 01 85 c0 74 d7 8b 35 2f 1d 7d 02 85 f6 75 24 8b 0c 24 <85> c9 0f 85 b7 01 00 00 0f b7 45 20 66 25 ff 1f 0f b7 c0 48 0f a3
RSP: 0018:ffffc90000003e00 EFLAGS: 00000046
RAX: b89f83594cf462f8 RBX: 0000000000000000 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8881049bc100 R08: 000000000008062d R09: 0000000000000000
R10: 0000000000080000 R11: ffffffffffcb5bd6 R12: 000000000000062d
R13: ffff8881049bb680 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000600 CR3: 00000001135cc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_acquire kernel/locking/lockdep.c:5623 [inline]
 lock_acquire+0x93/0x130 kernel/locking/lockdep.c:5588
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x20/0x30 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:363 [inline]
 advance_sched+0x30/0x250 net/sched/sch_taprio.c:716
 __run_hrtimer kernel/time/hrtimer.c:1688 [inline]
 __hrtimer_run_queues+0x1db/0x4a0 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x124/0x2a0 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
 __sysvec_apic_timer_interrupt+0x63/0x100 arch/x86/kernel/apic/apic.c:1102
 sysvec_apic_timer_interrupt+0x6d/0x90 arch/x86/kernel/apic/apic.c:1096
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:_raw_spin_unlock_irq+0x1c/0x20 kernel/locking/spinlock.c:203
Code: 00 00 5d e9 46 5f 89 fe 66 0f 1f 44 00 00 55 48 8b 74 24 08 48 89 fd 48 8d 7f 18 e8 9e d1 8f fe 48 89 ef e8 96 f6 8f fe fb 5d <c3> 0f 1f 00 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8
RSP: 0018:ffffc900027dbd38 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffff8881021fc201 RCX: ffffc900027dbcf4
RDX: 0000000000000002 RSI: ffff888237c2ae98 RDI: ffff888237c2ae80
RBP: ffff888237c2ae80 R08: 0000000000080035 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000018 R12: 00000000ffffc759
R13: 0000000000002710 R14: 000000000002c480 R15: 0000000000000286
 wq_worker_sleeping+0xc3/0xd0 kernel/workqueue.c:935
 sched_submit_work kernel/sched/core.c:6418 [inline]
 schedule+0x25/0x90 kernel/sched/core.c:6453
 schedule_timeout+0xde/0x170 kernel/time/timer.c:1914
 synchronize_rcu_expedited_wait_once kernel/rcu/tree_exp.h:472 [inline]
 synchronize_rcu_expedited_wait kernel/rcu/tree_exp.h:523 [inline]
 rcu_exp_wait_wake+0xcc/0x430 kernel/rcu/tree_exp.h:590
 process_one_work+0x32a/0x660 kernel/workqueue.c:2310
 worker_thread+0x5b/0x520 kernel/workqueue.c:2457
 kthread+0x13a/0x160 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
rcu: rcu_sched kthread timer wakeup didn't happen for 10001 jiffies! g1841 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=817
rcu: rcu_sched kthread starved for 10002 jiffies! g1841 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
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:14848 pid:   12 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5027 [inline]
 __schedule+0x2c8/0x7d0 kernel/sched/core.c:6373
 schedule+0x53/0x90 kernel/sched/core.c:6456
 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1033 Comm: kworker/0:3 Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: rcu_gp wait_rcu_exp_gp
RIP: 0010:arch_atomic_try_cmpxchg arch/x86/include/asm/atomic.h:202 [inline]
RIP: 0010:atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:513 [inline]
RIP: 0010:queued_spin_lock include/asm-generic/qspinlock.h:82 [inline]
RIP: 0010:do_raw_spin_lock+0x3a/0xa0 kernel/locking/spinlock_debug.c:115
Code: 55 10 65 48 8b 04 25 80 af 01 00 48 39 c2 74 43 8b 55 08 65 8b 05 a6 38 e3 7e 39 c2 74 46 31 c0 ba 01 00 00 00 f0 0f b1 55 00 <75> 49 65 8b 05 8d 38 e3 7e 89 45 08 65 48 8b 04 25 80 af 01 00 48
RSP: 0018:ffffc90000003ea8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88810fbd9b40 RCX: 0000000008084d29
RDX: 0000000000000001 RSI: 00000000b418a7a7 RDI: ffff88810fbd9ae8
RBP: ffff88810fbd9ae8 R08: 000000000008062d R09: 0000000000000000
R10: 0000000000080000 R11: ffffffffffcb5bd6 R12: ffffffff822223f0
R13: ffff888237c1de00 R14: ffff888237c1dd80 R15: 0000000084db4201
FS:  0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000600 CR3: 00000001135cc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 spin_lock include/linux/spinlock.h:363 [inline]
 advance_sched+0x30/0x250 net/sched/sch_taprio.c:716
 __run_hrtimer kernel/time/hrtimer.c:1688 [inline]
 __hrtimer_run_queues+0x1db/0x4a0 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x124/0x2a0 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
 __sysvec_apic_timer_interrupt+0x63/0x100 arch/x86/kernel/apic/apic.c:1102
 sysvec_apic_timer_interrupt+0x6d/0x90 arch/x86/kernel/apic/apic.c:1096
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:_raw_spin_unlock_irq+0x1c/0x20 kernel/locking/spinlock.c:203
Code: 00 00 5d e9 46 5f 89 fe 66 0f 1f 44 00 00 55 48 8b 74 24 08 48 89 fd 48 8d 7f 18 e8 9e d1 8f fe 48 89 ef e8 96 f6 8f fe fb 5d <c3> 0f 1f 00 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8
RSP: 0018:ffffc900027dbd38 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffff8881021fc201 RCX: ffffc900027dbcf4
RDX: 0000000000000002 RSI: ffff888237c2ae98 RDI: ffff888237c2ae80
RBP: ffff888237c2ae80 R08: 0000000000080035 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000018 R12: 00000000ffffc759
R13: 0000000000002710 R14: 000000000002c480 R15: 0000000000000286
 wq_worker_sleeping+0xc3/0xd0 kernel/workqueue.c:935
 sched_submit_work kernel/sched/core.c:6418 [inline]
 schedule+0x25/0x90 kernel/sched/core.c:6453
 schedule_timeout+0xde/0x170 kernel/time/timer.c:1914
 synchronize_rcu_expedited_wait_once kernel/rcu/tree_exp.h:472 [inline]
 synchronize_rcu_expedited_wait kernel/rcu/tree_exp.h:523 [inline]
 rcu_exp_wait_wake+0xcc/0x430 kernel/rcu/tree_exp.h:590
 process_one_work+0x32a/0x660 kernel/workqueue.c:2310
 worker_thread+0x5b/0x520 kernel/workqueue.c:2457
 kthread+0x13a/0x160 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>