ci2 starts bisection 2025-06-26 15:23:55.346093314 +0000 UTC m=+7925.461924068
bisecting fixing commit since 72244eab0dad81e1553d4f5e105ffadc412885cb
building syzkaller on f00eed24f2a1332b07fef1a353a439133978d97b
ensuring issue is reproducible on original commit 72244eab0dad81e1553d4f5e105ffadc412885cb

testing commit 72244eab0dad81e1553d4f5e105ffadc412885cb gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: ddb9ec6b8b25f45bdccb6ca4416555d3308189f0c30e23a8ec1e2b4518e71a52
run #0: crashed: INFO: rcu detected stall in sys_clock_nanosleep
run #1: crashed: INFO: rcu detected stall in rtnl_newlink
run #2: crashed: INFO: rcu detected stall in sys_socket
run #3: crashed: INFO: rcu detected stall in __do_munmap
run #4: crashed: INFO: rcu detected stall in sys_clock_nanosleep
run #5: crashed: INFO: rcu detected stall in sock_write_iter
run #6: crashed: INFO: rcu detected stall in cleanup_net
run #7: crashed: INFO: rcu detected stall in pwq_unbound_release_workfn
run #8: crashed: INFO: rcu detected stall in batadv_nc_worker
run #9: crashed: INFO: rcu detected stall in addrconf_dad_work
run #10: crashed: INFO: rcu detected stall in addrconf_dad_work
run #11: crashed: INFO: rcu detected stall in ieee80211_iface_work
run #12: crashed: INFO: rcu detected stall in dput
run #13: crashed: INFO: rcu detected stall in sys_exit_group
run #14: crashed: INFO: rcu detected stall in brk
run #15: crashed: INFO: rcu detected stall in sys_openat
run #16: crashed: INFO: rcu detected stall in process_one_work
run #17: crashed: INFO: rcu detected stall in linkwatch_event
run #18: crashed: no output from test machine
run #19: crashed: no output from test machine
representative crash: INFO: rcu detected stall in sys_clock_nanosleep, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed
testing commit 72244eab0dad81e1553d4f5e105ffadc412885cb gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 9b06620df1660f2e6110e975a34cb557b334da582871eb63f728df96292b21b5
run #0: crashed: INFO: rcu detected stall in validate_mm
run #1: crashed: INFO: rcu detected stall in sys_clock_nanosleep
run #2: crashed: INFO: rcu detected stall in netlink_release
run #3: crashed: INFO: rcu detected stall in ieee80211_iface_work
run #4: crashed: INFO: rcu detected stall in sys_mprotect
run #5: crashed: INFO: rcu detected stall in rtnetlink_rcv_msg
run #6: crashed: INFO: rcu detected stall in linkwatch_event
run #7: crashed: INFO: rcu detected stall in corrupted
run #8: crashed: INFO: rcu detected stall in linkwatch_event
run #9: crashed: no output from test machine
representative crash: INFO: rcu detected stall in validate_mm, 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=3707 full=7302 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 [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed
testing commit 72244eab0dad81e1553d4f5e105ffadc412885cb gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 0c1d5e8f796f4df2fac731a1ad88cebb262cf9051f493ac3310fdb52b79f774b
run #0: crashed: INFO: rcu detected stall in br_handle_frame
run #1: crashed: INFO: rcu detected stall in security_file_open
run #2: crashed: INFO: rcu detected stall in corrupted
run #3: crashed: INFO: rcu detected stall in rtnl_newlink
run #4: crashed: INFO: rcu detected stall in sys_clock_nanosleep
run #5: crashed: INFO: rcu detected stall in addrconf_dad_work
run #6: crashed: INFO: rcu detected stall in newfstatat
run #7: crashed: INFO: rcu detected stall in rtnl_newlink
run #8: crashed: INFO: rcu detected stall in rtnl_newlink
run #9: OK
representative crash: INFO: rcu detected stall in br_handle_frame, types: [HANG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit 72244eab0dad81e1553d4f5e105ffadc412885cb gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 7d35c2760eb1c9be403d5a328b0d87dc73cf040bbb315880d405b3e2aad43e46
run #0: crashed: INFO: rcu detected stall in try_check_zero
run #1: crashed: INFO: rcu detected stall in newfstat
run #2: crashed: INFO: rcu detected stall in mmap_pgoff
run #3: crashed: INFO: rcu detected stall in rtnl_newlink
run #4: crashed: INFO: rcu detected stall in clone
run #5: crashed: INFO: rcu detected stall in sys_exit_group
run #6: crashed: INFO: rcu detected stall in corrupted
run #7: crashed: INFO: rcu detected stall in sys_readlink
run #8: crashed: INFO: rcu detected stall in sys_sendto
run #9: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode
representative crash: INFO: rcu detected stall in try_check_zero, types: [HANG]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed
testing commit 72244eab0dad81e1553d4f5e105ffadc412885cb gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 00b72955fdf61fcfaf3b3986a77c6b9c64c759e4601d8d2fbcfa624cdab4a457
all runs: OK
false negative chance: 0.000
testing without sub-chunk 4/5
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit 72244eab0dad81e1553d4f5e105ffadc412885cb gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: c2d8d56489a5af6b95b1dda04f886d47346c4ff03d3ae37bf93fb5bf44ae4e64
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 sys_openat
run #3: crashed: INFO: rcu detected stall in newfstatat
run #4: crashed: INFO: rcu detected stall in newfstat
run #5: crashed: INFO: rcu detected stall in security_file_open
run #6: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode
run #7: crashed: INFO: rcu detected stall in security_file_open
run #8: crashed: INFO: rcu detected stall in sys_execve
run #9: crashed: INFO: rcu detected stall in inet_ioctl
representative crash: INFO: rcu detected stall in syscall_exit_to_user_mode, types: [HANG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed
testing commit 72244eab0dad81e1553d4f5e105ffadc412885cb gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 2ab110a483f140f31a80dd65286e9c95d348bea530b2ae16ad6e9ed6d8e04be5
run #0: crashed: INFO: rcu detected stall in __do_munmap
run #1: crashed: INFO: rcu detected stall in sys_openat
run #2: crashed: INFO: rcu detected stall in newfstatat
run #3: crashed: INFO: rcu detected stall in sys_clock_nanosleep
run #4: crashed: INFO: rcu detected stall in corrupted
run #5: crashed: INFO: rcu detected stall in sys_exit_group
run #6: crashed: INFO: rcu detected stall in syscall_enter_from_user_mode
run #7: crashed: INFO: rcu detected stall in sys_clock_nanosleep
run #8: crashed: INFO: rcu detected stall in call_usermodehelper_exec_async
run #9: crashed: no output from test machine
representative crash: INFO: rcu detected stall in __do_munmap, 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_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_INTEL 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 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 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 X86_X32]
disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed
testing current HEAD 1c700860e8bc079c5c71d73c55e51865d273943c
testing commit 1c700860e8bc079c5c71d73c55e51865d273943c gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 74941d8565d90c4c8260a0571a3acde7033604910e31358ad7beaa29f81967c4
run #0: crashed: INFO: rcu detected stall in smp_call_function
run #1: crashed: INFO: rcu detected stall in newfstatat
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 sys_exit_group
run #5: crashed: INFO: rcu detected stall in security_file_open
run #6: crashed: INFO: rcu detected stall in ext4_file_read_iter
run #7: crashed: INFO: rcu detected stall in sys_execve
run #8: crashed: INFO: rcu detected stall in validate_mm
run #9: crashed: no output from test machine
representative crash: INFO: rcu detected stall in smp_call_function, types: [HANG]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 1h52m24.285899806s (build: 29m52.333340763s, test: 1h12m27.93917374s)
crash still not fixed or there were kernel test errors
commit msg: Linux 5.15.185
crash: INFO: rcu detected stall in smp_call_function
rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
rcu: 	1-...0: (1 GPs behind) idle=e81/1/0x4000000000000000 softirq=7820/7826 fqs=5000 
	(detected by 0, t=10002 jiffies, g=5437, q=4394)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 24 Comm: kworker/1:1 Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: rcu_gp wait_rcu_exp_gp
RIP: 0010:do_raw_spin_lock+0x54/0xa0 kernel/locking/spinlock_debug.c:118
Code: 39 c2 74 46 31 c0 ba 01 00 00 00 f0 0f b1 55 00 75 49 65 8b 05 ad 24 e3 7e 89 45 08 65 48 8b 04 25 80 af 01 00 48 89 45 10 5d <c3> 48 c7 c6 af bd 32 83 e8 ef fe ff ff eb ab 48 c7 c6 bd bd 32 83
RSP: 0018:ffffc900000b8ec0 EFLAGS: 00000046
RAX: ffff88810022b680 RBX: 00000000000fc900 RCX: 00000000b8b6356b
RDX: 0000000000000001 RSI: 000000001eede50c RDI: ffffffff8837d408
RBP: ffffffff8837d408 R08: 0000000000080000 R09: 0000000000000000
R10: 0000000000080000 R11: ffffc900000b8ff8 R12: 0000000000000006
R13: ffffffff8837d408 R14: ffff888237d1dd80 R15: 18747d4b08000000
FS:  0000000000000000(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f958b7f6f98 CR3: 000000011f297000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:117 [inline]
 _raw_spin_lock_irqsave+0x2e/0x40 kernel/locking/spinlock.c:162
 debug_object_deactivate+0x47/0xd0 lib/debugobjects.c:749
 debug_hrtimer_deactivate kernel/time/hrtimer.c:415 [inline]
 debug_deactivate kernel/time/hrtimer.c:471 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1658 [inline]
 __hrtimer_run_queues+0xd9/0x4a0 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:flat_send_IPI_mask+0x1f/0x30 arch/x86/kernel/apic/apic_flat_64.c:65
Code: 66 2e 0f 1f 84 00 00 00 00 00 90 53 48 8b 3f 9c 5b fa ba 00 08 00 00 e8 8f b8 ff ff 9c 58 f6 c4 02 75 08 80 e7 02 74 01 fb 5b <c3> e8 db f6 78 01 eb f1 cc cc cc cc cc cc cc cc cc 0f 01 f9 66 90
RSP: 0018:ffffc900000d7d38 EFLAGS: 00000202
RAX: 0000000000000092 RBX: 0000000000000001 RCX: ffffffff836639c0
RDX: 0000000000000800 RSI: 00000000000000fb RDI: 0000000001000000
RBP: 0000000000000000 R08: 0000000000000286 R09: 0000000000000002
R10: 0000000000000000 R11: fefefefefefefeff R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff8120f500
 __smp_call_single_queue kernel/smp.c:496 [inline]
 generic_exec_single+0xb4/0x140 kernel/smp.c:529
 smp_call_function_single+0xef/0x160 kernel/smp.c:755
 sync_rcu_exp_select_node_cpus+0x1e0/0x310 kernel/rcu/tree_exp.h:394
 sync_rcu_exp_select_cpus+0x1a2/0x2f0 kernel/rcu/tree_exp.h:442
 rcu_exp_sel_wait_wake kernel/rcu/tree_exp.h:621 [inline]
 wait_rcu_exp_gp+0xa/0x20 kernel/rcu/tree_exp.h:635
 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>