ci2 starts bisection 2024-09-20 06:18:57.68722792 +0000 UTC m=+42928.622295970
bisecting fixing commit since fa93fa65db6e232b5f2226dd86c9f066ec6dfd97
building syzkaller on 1eda0d1459e5ff07903ffa2f8cedf55ae7b24af0
ensuring issue is reproducible on original commit fa93fa65db6e232b5f2226dd86c9f066ec6dfd97

testing commit fa93fa65db6e232b5f2226dd86c9f066ec6dfd97 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: c363f7bb65bb88a2a85164884b5e90b7811738a4224e3866082c95a783954e5e
run #0: crashed: INFO: rcu detected stall in batadv_nc_worker
run #1: crashed: INFO: rcu detected stall in addrconf_dad_work
run #2: crashed: INFO: rcu detected stall in inet6_rtm_newaddr
run #3: crashed: INFO: rcu detected stall in wg_packet_handshake_receive_worker
run #4: crashed: INFO: rcu detected stall in gc_worker
run #5: crashed: INFO: rcu detected stall in gc_worker
run #6: crashed: INFO: rcu detected stall in mld_ifc_work
run #7: crashed: INFO: rcu detected stall in addrconf_dad_work
run #8: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode
run #9: crashed: INFO: rcu detected stall in sys_execve
run #10: crashed: INFO: rcu detected stall in batadv_tt_purge
run #11: crashed: INFO: rcu detected stall in batadv_dat_purge
run #12: crashed: INFO: rcu detected stall in newfstatat
run #13: crashed: INFO: rcu detected stall in gc_worker
run #14: crashed: INFO: rcu detected stall in rtnl_newlink
run #15: crashed: INFO: rcu detected stall in gc_worker
run #16: crashed: INFO: task hung in linkwatch_event
run #17: crashed: INFO: rcu detected stall in rtnl_newlink
run #18: crashed: INFO: rcu detected stall in ieee80211_iface_work
run #19: crashed: no output from test machine
representative crash: INFO: rcu detected stall in batadv_nc_worker, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], they are not needed
testing commit fa93fa65db6e232b5f2226dd86c9f066ec6dfd97 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 0add5f56741e155fe9a52f52bba486746ae634856ff0b78a5ad59d1e79c30214
run #0: crashed: INFO: rcu detected stall in sys_openat
run #1: crashed: INFO: rcu detected stall in cleanup_net
run #2: crashed: INFO: rcu detected stall in try_check_zero
run #3: crashed: INFO: rcu detected stall in sys_socket
run #4: crashed: INFO: rcu detected stall in corrupted
run #5: crashed: INFO: rcu detected stall in kernfs_fop_open
run #6: crashed: INFO: rcu detected stall in corrupted
run #7: crashed: INFO: rcu detected stall in rtnl_newlink
run #8: crashed: INFO: rcu detected stall in gc_worker
run #9: crashed: no output from test machine
representative crash: INFO: rcu detected stall in sys_openat, types: [HANG]
the bug reproduces without the instrumentation
disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed
kconfig minimization: base=3706 full=7299 leaves diff=2036
split chunks (needed=false): <2036>
split chunk #0 of len 2036 into 5 parts
testing without sub-chunk 1/5
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit fa93fa65db6e232b5f2226dd86c9f066ec6dfd97 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: a77077015993d401f64a65ff9f64bb2d69808db93c5b5c76ad0abc88c22c1a9f
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 tcp_setsockopt
run #3: crashed: INFO: task hung in addrconf_dad_work
run #4: crashed: INFO: task hung in cleanup_net
run #5: crashed: INFO: rcu detected stall in gc_worker
run #6: crashed: INFO: rcu detected stall in gc_worker
run #7: crashed: INFO: rcu detected stall in iterate_cleanup_work
run #8: crashed: no output from test machine
run #9: OK
representative crash: INFO: rcu detected stall in process_one_work, types: [HANG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed
testing commit fa93fa65db6e232b5f2226dd86c9f066ec6dfd97 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: fdd61181e81fd0f7a99423e8ba14d082009fc2369c63cb645b27487cffb5418c
run #0: crashed: INFO: rcu detected stall in try_check_zero
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 do_idle
run #4: crashed: INFO: rcu detected stall in linkwatch_event
run #5: crashed: INFO: rcu detected stall in iterate_cleanup_work
run #6: crashed: no output from test machine
run #7: crashed: no output from test machine
run #8: crashed: no output from test machine
run #9: crashed: no output from test machine
representative crash: INFO: rcu detected stall in try_check_zero, types: [HANG UNKNOWN]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed
testing commit fa93fa65db6e232b5f2226dd86c9f066ec6dfd97 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: d5b27dfffab36260d2190e1a230da94068d3d7e472521b4b6cc6fa7591bedcde
all runs: OK
false negative chance: 0.000
testing without sub-chunk 4/5
disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed
testing commit fa93fa65db6e232b5f2226dd86c9f066ec6dfd97 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: e507a653251c4a1e19eee5d6ad9d1cdf1feea0444f219b65e93ef509b2b1167f
run #0: crashed: INFO: rcu detected stall in ext4_file_read_iter
run #1: crashed: INFO: rcu detected stall in sys_socket
run #2: crashed: INFO: rcu detected stall in validate_mm
run #3: crashed: INFO: rcu detected stall in wb_workfn
run #4: crashed: INFO: rcu detected stall in security_file_open
run #5: crashed: INFO: rcu detected stall in sys_exit_group
run #6: crashed: INFO: task hung in del_device_store
run #7: crashed: INFO: rcu detected stall in gc_worker
run #8: crashed: no output from test machine
run #9: crashed: no output from test machine
representative crash: INFO: rcu detected stall in ext4_file_read_iter, 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 fa93fa65db6e232b5f2226dd86c9f066ec6dfd97 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: eec041d9fcec075cb70e701965bd2b3dc1ae4c265187f915bc57db25f851e740
run #0: crashed: INFO: rcu detected stall in call_usermodehelper_exec_async
run #1: crashed: INFO: rcu detected stall in sys_exit_group
run #2: crashed: INFO: rcu detected stall in corrupted
run #3: crashed: INFO: rcu detected stall in gc_worker
run #4: crashed: INFO: rcu detected stall in rw_verify_area
run #5: crashed: INFO: rcu detected stall in gc_worker
run #6: crashed: INFO: rcu detected stall in gc_worker
run #7: crashed: no output from test machine
run #8: OK
run #9: OK
representative crash: INFO: rcu detected stall in call_usermodehelper_exec_async, 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 X86_X32]
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
determining the merge base between fa93fa65db6e232b5f2226dd86c9f066ec6dfd97 and baeb9a7d8b60b021d907127509c44507539c15e5
8bb7eca972ad531c9b149c0a51ab43a417385813/Linux 5.15 is a merge base, check if it has the bug
testing commit 8bb7eca972ad531c9b149c0a51ab43a417385813 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 4d41c04df20fdcbee3414ba18dde13f1dbbc2ca7c8b9e14c91e54e7829cc1aed
run #0: crashed: INFO: rcu detected stall in vma_link
run #1: crashed: INFO: rcu detected stall in do_idle
run #2: crashed: INFO: rcu detected stall in corrupted
run #3: crashed: INFO: rcu detected stall in sys_exit_group
run #4: crashed: INFO: rcu detected stall in do_idle
run #5: crashed: BUG: soft lockup in tc_modify_qdisc
run #6: crashed: BUG: soft lockup in do_idle
run #7: crashed: no output from test machine
run #8: crashed: no output from test machine
run #9: OK
representative crash: INFO: rcu detected stall in vma_link, types: [HANG]
testing current HEAD baeb9a7d8b60b021d907127509c44507539c15e5
testing commit baeb9a7d8b60b021d907127509c44507539c15e5 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 7763d91592213e4d04c2124f51da1a638069007e2d3445db328894064994d34e
all runs: OK
false negative chance: 0.000
# git bisect start baeb9a7d8b60b021d907127509c44507539c15e5 8bb7eca972ad531c9b149c0a51ab43a417385813
Bisecting: 129375 revisions left to test after this (roughly 17 steps)
[c8cc58e289ed3b5bc50258f52776cf3dfa3bad66] Merge tag 'drm-next-2023-04-24' of git://anongit.freedesktop.org/drm/drm

determine whether the revision contains the guilty commit
revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable
testing commit c8cc58e289ed3b5bc50258f52776cf3dfa3bad66 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: c9bced5cf7fc3d1cf2c27045fcbc7a91758793529f18d6eaa72636fbad016cae
run #0: crashed: INFO: rcu detected stall in syscall_enter_from_user_mode
run #1: crashed: INFO: rcu detected stall in net_tx_action
run #2: crashed: INFO: rcu detected stall in filemap_fault
run #3: crashed: INFO: rcu detected stall in corrupted
run #4: crashed: BUG: soft lockup in net_tx_action
run #5: crashed: INFO: rcu detected stall in corrupted
run #6: crashed: INFO: rcu detected stall in sys_clone3
run #7: crashed: no output from test machine
run #8: crashed: no output from test machine
run #9: crashed: no output from test machine
representative crash: INFO: rcu detected stall in syscall_enter_from_user_mode, types: [HANG UNKNOWN]
# git bisect good c8cc58e289ed3b5bc50258f52776cf3dfa3bad66
Bisecting: 65589 revisions left to test after this (roughly 16 steps)
[689237ab37c59b9909bc9371d7fece3081683fba] fbdev/intelfb: Remove driver

determine whether the revision contains the guilty commit
revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable
testing commit 689237ab37c59b9909bc9371d7fece3081683fba gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: d534e445b834b6b097f661a306a156523a33314df0597fd06bf7fc1aa2e9e241
run #0: crashed: INFO: rcu detected stall in corrupted
run #1: crashed: INFO: rcu detected stall in sys_exit_group
run #2: crashed: INFO: rcu detected stall in corrupted
run #3: crashed: INFO: rcu detected stall in sys_openat
run #4: crashed: INFO: rcu detected stall in sys_getsockopt
run #5: crashed: INFO: rcu detected stall in call_usermodehelper_exec_async
run #6: crashed: INFO: rcu detected stall in call_usermodehelper_exec_async
run #7: crashed: INFO: rcu detected stall in sys_newfstatat
run #8: crashed: INFO: rcu detected stall in corrupted
run #9: crashed: INFO: rcu detected stall in corrupted
representative crash: INFO: rcu detected stall in corrupted, types: [HANG]
# git bisect good 689237ab37c59b9909bc9371d7fece3081683fba
Bisecting: 31872 revisions left to test after this (roughly 15 steps)
[1b294a1f35616977caddaddf3e9d28e576a1adbc] Merge tag 'net-next-6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

determine whether the revision contains the guilty commit
revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable
testing commit 1b294a1f35616977caddaddf3e9d28e576a1adbc gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: b37f7736d18951eb90a5d973ef1d50f0c912229a2366d16c620bab1b7ae6eb11
run #0: crashed: INFO: rcu detected stall in sys_rename
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: crashed: INFO: rcu detected stall in sys_exit_group
run #3: crashed: INFO: rcu detected stall in sys_unshare
run #4: crashed: INFO: rcu detected stall in corrupted
run #5: crashed: INFO: rcu detected stall in corrupted
run #6: crashed: INFO: rcu detected stall in worker_thread
run #7: crashed: INFO: rcu detected stall in rtnetlink_rcv_msg
run #8: crashed: INFO: rcu detected stall in corrupted
run #9: crashed: INFO: rcu detected stall in corrupted
representative crash: INFO: rcu detected stall in sys_rename, types: [HANG]
# git bisect good 1b294a1f35616977caddaddf3e9d28e576a1adbc
Bisecting: 16955 revisions left to test after this (roughly 14 steps)
[280e36f0d5b997173d014c07484c03a7f7750668] nsfs: use cleanup guard

determine whether the revision contains the guilty commit
revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable
testing commit 280e36f0d5b997173d014c07484c03a7f7750668 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 3b0f4520a164a771fb40a571fc61add7b59c17d3c97fc7812bd72ac654ba816b
all runs: OK
false negative chance: 0.000
# git bisect bad 280e36f0d5b997173d014c07484c03a7f7750668
Bisecting: 7460 revisions left to test after this (roughly 13 steps)
[e19de2064fdf6f1f2488e36cf3927c3f1d01803c] Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

determine whether the revision contains the guilty commit
revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable
testing commit e19de2064fdf6f1f2488e36cf3927c3f1d01803c gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 2c1eddc10b308b95da486d1f2c4003aab1ff41b69b54baa3644d66db36b262b7
all runs: OK
false negative chance: 0.000
# git bisect bad e19de2064fdf6f1f2488e36cf3927c3f1d01803c
Bisecting: 3756 revisions left to test after this (roughly 12 steps)
[56172ac1024d2cb9194ea42fe76d05c0748863f4] Merge tag 'hsi-for-6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-hsi

determine whether the revision contains the guilty commit
revision 1b294a1f35616977caddaddf3e9d28e576a1adbc crashed and is reachable
testing commit 56172ac1024d2cb9194ea42fe76d05c0748863f4 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 1fb65cf322aaab4f6c7cb872a6124d5b33656aaa2f8f359759571f74b7781255
run #0: crashed: INFO: rcu detected stall in sys_execve
run #1: crashed: INFO: rcu detected stall in security_file_open
run #2: crashed: INFO: rcu detected stall in worker_thread
run #3: crashed: INFO: rcu detected stall in corrupted
run #4: crashed: INFO: rcu detected stall in sys_unshare
run #5: crashed: INFO: rcu detected stall in corrupted
run #6: crashed: INFO: rcu detected stall in sys_exit_group
run #7: crashed: no output from test machine
run #8: OK
run #9: OK
representative crash: INFO: rcu detected stall in sys_execve, types: [HANG]
# git bisect good 56172ac1024d2cb9194ea42fe76d05c0748863f4
Bisecting: 1877 revisions left to test after this (roughly 11 steps)
[b6394d6f715919c053c1450ef0d7c5e517b53764] Merge tag 'pull-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

determine whether the revision contains the guilty commit
revision c8cc58e289ed3b5bc50258f52776cf3dfa3bad66 crashed and is reachable
testing commit b6394d6f715919c053c1450ef0d7c5e517b53764 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: df57d7edf8fd9b0a106dce9e73f7670df7b0f931015aab0fb525ed885c8df573
run #0: crashed: INFO: rcu detected stall in corrupted
run #1: crashed: INFO: rcu detected stall in worker_thread
run #2: crashed: INFO: rcu detected stall in worker_thread
run #3: crashed: INFO: rcu detected stall in corrupted
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 corrupted
run #7: crashed: INFO: rcu detected stall in worker_thread
run #8: crashed: no output from test machine
run #9: OK
representative crash: INFO: rcu detected stall in corrupted, types: [HANG]
# git bisect good b6394d6f715919c053c1450ef0d7c5e517b53764
Bisecting: 1020 revisions left to test after this (roughly 10 steps)
[d90be6e4aaf23cd4a2c202891399cbafe669aaab] Merge tag 'driver-core-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

determine whether the revision contains the guilty commit
revision b6394d6f715919c053c1450ef0d7c5e517b53764 crashed and is reachable
testing commit d90be6e4aaf23cd4a2c202891399cbafe669aaab gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: bc11b4367507a442904518516e9b84fa20b9a585f9bdb1d30d417b0bbfdb767c
run #0: crashed: INFO: rcu detected stall in sys_exit_group
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: crashed: INFO: rcu detected stall in do_vmi_munmap
run #3: crashed: INFO: rcu detected stall in kernfs_fop_write_iter
run #4: crashed: INFO: rcu detected stall in sys_clone
run #5: crashed: INFO: rcu detected stall in worker_thread
run #6: crashed: INFO: rcu detected stall in worker_thread
run #7: crashed: INFO: rcu detected stall in corrupted
run #8: crashed: no output from test machine
run #9: crashed: no output from test machine
representative crash: INFO: rcu detected stall in sys_exit_group, types: [HANG]
# git bisect good d90be6e4aaf23cd4a2c202891399cbafe669aaab
Bisecting: 502 revisions left to test after this (roughly 9 steps)
[4b3529edbb8ff069d762c6947e055e10c1748170] Merge tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

determine whether the revision contains the guilty commit
revision 1b294a1f35616977caddaddf3e9d28e576a1adbc crashed and is reachable
testing commit 4b3529edbb8ff069d762c6947e055e10c1748170 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 92cb2a437b1b135d60185477b72dc3a0c7edd907fbb3e1c631cfef0c4c30865d
run #0: crashed: INFO: rcu detected stall in sys_sendto
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: crashed: INFO: rcu detected stall in sys_unshare
run #3: crashed: INFO: rcu detected stall in do_vmi_munmap
run #4: crashed: INFO: rcu detected stall in corrupted
run #5: crashed: INFO: rcu detected stall in sys_unshare
run #6: crashed: INFO: rcu detected stall in worker_thread
run #7: crashed: INFO: rcu detected stall in do_idle
run #8: crashed: INFO: rcu detected stall in worker_thread
run #9: crashed: INFO: rcu detected stall in sys_exit_group
representative crash: INFO: rcu detected stall in sys_sendto, types: [HANG]
# git bisect good 4b3529edbb8ff069d762c6947e055e10c1748170
Bisecting: 258 revisions left to test after this (roughly 8 steps)
[4286e1fceb8c99f25332dc7e85f9879408caa45a] Merge tag 'i3c/for-6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux

determine whether the revision contains the guilty commit
revision c8cc58e289ed3b5bc50258f52776cf3dfa3bad66 crashed and is reachable
testing commit 4286e1fceb8c99f25332dc7e85f9879408caa45a gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 371ee3cd5f557701db6935c35b1544184fba14fd7f66172511f9867c989e6cca
run #0: crashed: INFO: rcu detected stall in do_vmi_munmap
run #1: crashed: INFO: rcu detected stall in sys_mprotect
run #2: crashed: INFO: rcu detected stall in worker_thread
run #3: crashed: INFO: rcu detected stall in sys_execve
run #4: crashed: INFO: rcu detected stall in sock_close
run #5: crashed: INFO: rcu detected stall in worker_thread
run #6: crashed: INFO: rcu detected stall in corrupted
run #7: crashed: INFO: rcu detected stall in worker_thread
run #8: crashed: no output from test machine
run #9: OK
representative crash: INFO: rcu detected stall in do_vmi_munmap, types: [HANG]
# git bisect good 4286e1fceb8c99f25332dc7e85f9879408caa45a
Bisecting: 144 revisions left to test after this (roughly 7 steps)
[4a4be1ad3a6efea16c56615f31117590fd881358] Revert "vfs: Delete the associated dentry when deleting a file"

determine whether the revision contains the guilty commit
revision b6394d6f715919c053c1450ef0d7c5e517b53764 crashed and is reachable
testing commit 4a4be1ad3a6efea16c56615f31117590fd881358 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 9a5ba609f830a8144cac0c5b5b53a0f3a18938471acdce5bedb1851e73757e40
run #0: crashed: lost connection to test machine
run #1: crashed: INFO: rcu detected stall in sys_exit_group
run #2: crashed: INFO: rcu detected stall in corrupted
run #3: crashed: INFO: rcu detected stall in sys_unshare
run #4: crashed: INFO: rcu detected stall in sys_unshare
run #5: crashed: INFO: rcu detected stall in corrupted
run #6: crashed: no output from test machine
run #7: crashed: no output from test machine
run #8: crashed: no output from test machine
run #9: crashed: INFO: rcu detected stall in do_idle
representative crash: INFO: rcu detected stall in sys_exit_group, types: [HANG UNKNOWN]
# git bisect good 4a4be1ad3a6efea16c56615f31117590fd881358
Bisecting: 70 revisions left to test after this (roughly 6 steps)
[e889eb17f456176843ad7d8b24152b5989cd5c1e] Merge tag 'nf-24-05-29' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf

determine whether the revision contains the guilty commit
revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable
testing commit e889eb17f456176843ad7d8b24152b5989cd5c1e gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 48fb690fd71716c2a60f5d261aa2ae3ebc5735b7faf157d0cfec49f788675a1c
all runs: OK
false negative chance: 0.000
# git bisect bad e889eb17f456176843ad7d8b24152b5989cd5c1e
Bisecting: 36 revisions left to test after this (roughly 5 steps)
[f4dca95fc0f6350918f2e6727e35b41f7f86fcce] tcp: reduce accepted window in NEW_SYN_RECV state

determine whether the revision contains the guilty commit
revision b6394d6f715919c053c1450ef0d7c5e517b53764 crashed and is reachable
testing commit f4dca95fc0f6350918f2e6727e35b41f7f86fcce gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 5a49683547bbb282e031fa09dc6776b454d6d9cac7c758e75cfced8db4eff019
run #0: crashed: lost connection to test machine
run #1: crashed: INFO: rcu detected stall in shmem_file_write_iter
run #2: crashed: INFO: rcu detected stall in do_vmi_munmap
run #3: crashed: INFO: rcu detected stall in sys_exit_group
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 worker_thread
run #7: crashed: INFO: rcu detected stall in worker_thread
run #8: crashed: no output from test machine
run #9: OK
representative crash: INFO: rcu detected stall in shmem_file_write_iter, types: [HANG]
# git bisect good f4dca95fc0f6350918f2e6727e35b41f7f86fcce
Bisecting: 18 revisions left to test after this (roughly 4 steps)
[fb66df20a7201e60f2b13d7f95d031b31a8831d3] net/sched: taprio: extend minimum interval restriction to entire cycle too

determine whether the revision contains the guilty commit
revision 56172ac1024d2cb9194ea42fe76d05c0748863f4 crashed and is reachable
testing commit fb66df20a7201e60f2b13d7f95d031b31a8831d3 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: bc33ed0f5673fe794e75b094aa30f7974e9461b6b7673705c42cd91e73057ca9
all runs: OK
false negative chance: 0.000
# git bisect bad fb66df20a7201e60f2b13d7f95d031b31a8831d3
Bisecting: 8 revisions left to test after this (roughly 3 steps)
[5597613fb3cf0e36d26cfd8fb2a63196da249333] selftests: mptcp: lib: support flaky subtests

determine whether the revision contains the guilty commit
revision d90be6e4aaf23cd4a2c202891399cbafe669aaab crashed and is reachable
testing commit 5597613fb3cf0e36d26cfd8fb2a63196da249333 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 88416280696b4775069ee0f3887f6604586f5b383bd6f8f2f306ef4f16a97596
run #0: crashed: INFO: rcu detected stall in corrupted
run #1: crashed: INFO: rcu detected stall in call_usermodehelper_exec_async
run #2: crashed: INFO: rcu detected stall in corrupted
run #3: crashed: INFO: rcu detected stall in call_usermodehelper_exec_async
run #4: crashed: INFO: rcu detected stall in sys_exit_group
run #5: crashed: INFO: rcu detected stall in worker_thread
run #6: crashed: no output from test machine
run #7: crashed: no output from test machine
run #8: crashed: no output from test machine
run #9: crashed: no output from test machine
representative crash: INFO: rcu detected stall in corrupted, types: [HANG UNKNOWN]
# git bisect good 5597613fb3cf0e36d26cfd8fb2a63196da249333
Bisecting: 4 revisions left to test after this (roughly 2 steps)
[6e15774d92056f7e4d226b2fc758124a6c803f99] Merge branch 'selftests-mptcp-mark-unstable-subtests-as-flaky'

determine whether the revision contains the guilty commit
revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable
testing commit 6e15774d92056f7e4d226b2fc758124a6c803f99 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: d86e3c5419c57b373b9d357b37a8276f03fb1f94050114f2cdee579295003f0b
run #0: crashed: INFO: rcu detected stall in sys_exit_group
run #1: crashed: INFO: rcu detected stall in do_idle
run #2: crashed: INFO: rcu detected stall in worker_thread
run #3: crashed: INFO: rcu detected stall in corrupted
run #4: crashed: INFO: rcu detected stall in sys_openat
run #5: crashed: INFO: rcu detected stall in __vm_enough_memory
run #6: crashed: INFO: rcu detected stall in corrupted
run #7: crashed: INFO: rcu detected stall in sys_exit_group
run #8: crashed: no output from test machine
run #9: crashed: no output from test machine
representative crash: INFO: rcu detected stall in sys_exit_group, types: [HANG]
# git bisect good 6e15774d92056f7e4d226b2fc758124a6c803f99
Bisecting: 2 revisions left to test after this (roughly 1 step)
[4b4647add7d3c8530493f7247d11e257ee425bf0] sock_map: avoid race between sock_map_close and sk_psock_put

determine whether the revision contains the guilty commit
revision 56172ac1024d2cb9194ea42fe76d05c0748863f4 crashed and is reachable
testing commit 4b4647add7d3c8530493f7247d11e257ee425bf0 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: a395b3c424a5cd7b5ddc40f816c37c0c37abf403866bb1508560de3734983ea1
run #0: infra problem: &{Code:ZONE_RESOURCE_POOL_EXHAUSTED_WITH_DETAILS ErrorDetails:[0xc0028b16d0 0xc0028b17c0 0xc0028b1860] Location: Message:The zone 'projects/syzkaller/zones/us-central1-c' does not have enough resources available to fulfill the request.  '(resource type:compute)'. ForceSendFields:[] NullFields:[]}
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: crashed: INFO: rcu detected stall in sys_unshare
run #3: crashed: INFO: rcu detected stall in corrupted
run #4: crashed: INFO: rcu detected stall in worker_thread
run #5: crashed: INFO: rcu detected stall in do_vmi_munmap
run #6: crashed: INFO: rcu detected stall in sys_openat
run #7: crashed: INFO: rcu detected stall in __get_unmapped_area
run #8: crashed: no output from test machine
run #9: crashed: INFO: rcu detected stall in sys_exit_group
representative crash: INFO: rcu detected stall in corrupted, types: [HANG]
# git bisect good 4b4647add7d3c8530493f7247d11e257ee425bf0
Bisecting: 0 revisions left to test after this (roughly 1 step)
[e634134180885574d1fe7aa162777ba41e7fcd5b] net/sched: taprio: make q->picos_per_byte available to fill_sched_entry()

determine whether the revision contains the guilty commit
revision d90be6e4aaf23cd4a2c202891399cbafe669aaab crashed and is reachable
testing commit e634134180885574d1fe7aa162777ba41e7fcd5b gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 04e6208b0dae2e714344b03537c54118e190e8e5794285d3c69daa8933134c23
all runs: OK
false negative chance: 0.000
# git bisect bad e634134180885574d1fe7aa162777ba41e7fcd5b
Bisecting: 0 revisions left to test after this (roughly 0 steps)
[56a5cf538c3f2d935b0d81040a8303b6e7fc5fd8] net: ti: icssg-prueth: Fix start counter for ft1 filter

determine whether the revision contains the guilty commit
revision 56172ac1024d2cb9194ea42fe76d05c0748863f4 crashed and is reachable
testing commit 56a5cf538c3f2d935b0d81040a8303b6e7fc5fd8 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 3461113aa6f004380d198710ddade22ddb47ee183dc42f159a1ec05dc2091197
run #0: crashed: INFO: rcu detected stall in sys_exit_group
run #1: crashed: INFO: rcu detected stall in worker_thread
run #2: crashed: INFO: rcu detected stall in do_syscall_64
run #3: crashed: INFO: rcu detected stall in do_syscall_64
run #4: crashed: INFO: rcu detected stall in corrupted
run #5: crashed: BUG: soft lockup in pipe_write
run #6: crashed: INFO: rcu detected stall in do_idle
run #7: crashed: INFO: rcu detected stall in do_idle
run #8: crashed: INFO: rcu detected stall in rtnl_newlink
run #9: crashed: no output from test machine
representative crash: INFO: rcu detected stall in sys_exit_group, types: [HANG]
# git bisect good 56a5cf538c3f2d935b0d81040a8303b6e7fc5fd8
e634134180885574d1fe7aa162777ba41e7fcd5b is the first bad commit
commit e634134180885574d1fe7aa162777ba41e7fcd5b
Author: Vladimir Oltean <vladimir.oltean@nxp.com>
Date:   Mon May 27 18:39:54 2024 +0300

    net/sched: taprio: make q->picos_per_byte available to fill_sched_entry()
    
    In commit b5b73b26b3ca ("taprio: Fix allowing too small intervals"), a
    comparison of user input against length_to_duration(q, ETH_ZLEN) was
    introduced, to avoid RCU stalls due to frequent hrtimers.
    
    The implementation of length_to_duration() depends on q->picos_per_byte
    being set for the link speed. The blamed commit in the Fixes: tag has
    moved this too late, so the checks introduced above are ineffective.
    The q->picos_per_byte is zero at parse_taprio_schedule() ->
    parse_sched_list() -> parse_sched_entry() -> fill_sched_entry() time.
    
    Move the taprio_set_picos_per_byte() call as one of the first things in
    taprio_change(), before the bulk of the netlink attribute parsing is
    done. That's because it is needed there.
    
    Add a selftest to make sure the issue doesn't get reintroduced.
    
    Fixes: 09dbdf28f9f9 ("net/sched: taprio: fix calculation of maximum gate durations")
    Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
    Reviewed-by: Eric Dumazet <edumazet@google.com>
    Link: https://lore.kernel.org/r/20240527153955.553333-1-vladimir.oltean@nxp.com
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>

 net/sched/sch_taprio.c                             |  4 +++-
 .../tc-testing/tc-tests/qdiscs/taprio.json         | 22 ++++++++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)

accumulated error probability: 0.00
culprit signature: 04e6208b0dae2e714344b03537c54118e190e8e5794285d3c69daa8933134c23
parent  signature: 3461113aa6f004380d198710ddade22ddb47ee183dc42f159a1ec05dc2091197
revisions tested: 28, total time: 8h32m24.324223623s (build: 3h59m23.225361269s, test: 4h20m11.060535884s)
first good commit: e634134180885574d1fe7aa162777ba41e7fcd5b net/sched: taprio: make q->picos_per_byte available to fill_sched_entry()
recipients (to): ["edumazet@google.com" "kuba@kernel.org" "vladimir.oltean@nxp.com"]
recipients (cc): []