ci2 starts bisection 2025-04-13 01:09:59.558515621 +0000 UTC m=+104765.982001119 bisecting fixing commit since 0c935c049b5c196b83b968c72d348ae6fff83ea2 building syzkaller on c3901742785ff25afdc6f470af7b25b69d7c4f2f ensuring issue is reproducible on original commit 0c935c049b5c196b83b968c72d348ae6fff83ea2 testing commit 0c935c049b5c196b83b968c72d348ae6fff83ea2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6c7caff35ff8e22e838b60882808d48a79d7f37a449511c00ce9673f22da2660 all runs: crashed: INFO: task hung in ext4_stop_mmpd representative crash: INFO: task hung in ext4_stop_mmpd, types: [HANG] check whether we can drop unnecessary instrumentation disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed testing commit 0c935c049b5c196b83b968c72d348ae6fff83ea2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5d224d533f5629e984ea42e649cf2abd5ba7a5e3453181e156db56e21496e9eb all runs: crashed: INFO: task hung in ext4_stop_mmpd representative crash: INFO: task hung in ext4_stop_mmpd, types: [HANG] the bug reproduces without the instrumentation disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed kconfig minimization: base=3706 full=7305 leaves diff=2038 split chunks (needed=false): <2038> split chunk #0 of len 2038 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 0c935c049b5c196b83b968c72d348ae6fff83ea2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: abb8a035e753afc3dceb9d24133bb253c8e1ddf5cefc5874853697dee19d59d2 run #0: crashed: INFO: task hung in ext4_stop_mmpd run #1: crashed: INFO: task hung in ext4_stop_mmpd run #2: crashed: INFO: task hung in ext4_stop_mmpd run #3: crashed: INFO: task hung in ext4_stop_mmpd run #4: crashed: INFO: task hung in ext4_stop_mmpd run #5: crashed: INFO: task hung in ext4_stop_mmpd run #6: crashed: INFO: task hung in ext4_stop_mmpd run #7: crashed: INFO: task hung in ext4_stop_mmpd run #8: OK run #9: crashed: INFO: task hung in ext4_stop_mmpd representative crash: INFO: task hung in ext4_stop_mmpd, 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 0c935c049b5c196b83b968c72d348ae6fff83ea2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d3d3f8a9974ceb1bc7ff4cfb09736dbbdfae916a3dfac74175f9a4953bda1277 all runs: crashed: INFO: task hung in ext4_stop_mmpd representative crash: INFO: task hung in ext4_stop_mmpd, types: [HANG] 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 0c935c049b5c196b83b968c72d348ae6fff83ea2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: dc0739bdd2101725a1b4262d246ac42554201552f3a37d653356380f62de7878 run #0: crashed: INFO: task hung in ext4_stop_mmpd run #1: crashed: INFO: task hung in ext4_stop_mmpd run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK representative crash: INFO: task hung in ext4_stop_mmpd, types: [HANG] testing without sub-chunk 4/5 disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], they are not needed testing commit 0c935c049b5c196b83b968c72d348ae6fff83ea2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 51b9a4383ab5e724f4bd0350585205419b0030208b04344bcde7394a5cbbfb1f all runs: crashed: INFO: task hung in ext4_stop_mmpd representative crash: INFO: task hung in ext4_stop_mmpd, 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 0c935c049b5c196b83b968c72d348ae6fff83ea2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 10ba9dd5f2d1e564ca801228d2dfc30e861b5036cf4986f8e806ebaa10c2b187 all runs: crashed: INFO: task hung in ext4_stop_mmpd representative crash: INFO: task hung in ext4_stop_mmpd, 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 [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed determining the merge base between 0c935c049b5c196b83b968c72d348ae6fff83ea2 and 7cdabafc001202de9984f22c973305f424e0a8b7 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: fdb7ecab868d61164db5ff45da8bdd37a31773550c8f249ad089588d8f9289c5 all runs: crashed: INFO: task hung in ext4_stop_mmpd representative crash: INFO: task hung in ext4_stop_mmpd, types: [HANG] testing current HEAD 7cdabafc001202de9984f22c973305f424e0a8b7 testing commit 7cdabafc001202de9984f22c973305f424e0a8b7 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7b40a51821fd7f810b88338bb6da2db5512b8ef57ada9daac0bd04f25c4a9b0e all runs: OK false negative chance: 0.000 # git bisect start 7cdabafc001202de9984f22c973305f424e0a8b7 8bb7eca972ad531c9b149c0a51ab43a417385813 Bisecting: 153156 revisions left to test after this (roughly 17 steps) [56cbceab928d7ac3702de172ff8dcc1da2a6aaeb] Merge tag 'usb-6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 56cbceab928d7ac3702de172ff8dcc1da2a6aaeb gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 57460effed5942ce556cff3f776e34d3b2038ff30754b4efd4ec2abaf91236c3 all runs: OK false negative chance: 0.000 # git bisect bad 56cbceab928d7ac3702de172ff8dcc1da2a6aaeb Bisecting: 76753 revisions left to test after this (roughly 16 steps) [36b99942d4770e91d58e7578480db2be8e059c80] DT binding for sample format conversion determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 36b99942d4770e91d58e7578480db2be8e059c80 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 17c871a2733fd873e4292538dc04556ba8e76153bdf90edf6d5243973f16be2b run #0: boot failed: can't ssh into the instance run #1: boot failed: can't ssh into the instance run #2: boot failed: can't ssh into the instance run #3: boot failed: can't ssh into the instance run #4: boot failed: can't ssh into the instance run #5: boot failed: can't ssh into the instance run #6: boot failed: general protection fault in __register_sysctl_table run #7: boot failed: general protection fault in call_usermodehelper_setup run #8: boot failed: BUG: unable to handle kernel paging request in bsearch run #9: boot failed: general protection fault in kernel_execve run #10: boot failed: general protection fault in __register_sysctl_table run #11: boot failed: can't ssh into the instance run #12: boot failed: general protection fault in __register_sysctl_table run #13: boot failed: general protection fault in vma_interval_tree_remove run #14: boot failed: general protection fault in watchdog run #15: boot failed: can't ssh into the instance run #16: boot failed: general protection fault in mac80211_hwsim_new_radio run #17: boot failed: can't ssh into the instance run #18: boot failed: general protection fault in late_resume_init run #19: boot failed: stack segment fault in copy_sighand unable to determine the verdict: 0 good runs (wanted 15), for bad wanted 10 in total, got 0 # git bisect skip 36b99942d4770e91d58e7578480db2be8e059c80 Bisecting: 76679 revisions left to test after this (roughly 16 steps) [14a4d22ead0d9c01a6d7e9cb7f1d321dd29d354b] dt-bindings: iio: temperature: use spi-peripheral-props.yaml determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 14a4d22ead0d9c01a6d7e9cb7f1d321dd29d354b gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c35976738343bbaa9334c6bdaf2cef954f3d88dd11f26eddeb371cdfc3d77878 run #0: boot failed: can't ssh into the instance run #1: boot failed: can't ssh into the instance run #2: boot failed: can't ssh into the instance run #3: boot failed: can't ssh into the instance run #4: boot failed: stack segment fault in __kernfs_new_node run #5: boot failed: general protection fault in alloc_netdev_mqs run #6: boot failed: general protection fault in ipv6_add_dev run #7: boot failed: can't ssh into the instance run #8: boot failed: general protection fault in free_work run #9: boot failed: general protection fault in late_resume_init run #10: boot failed: general protection fault in late_resume_init run #11: boot failed: general protection fault in __devinet_sysctl_register run #12: boot failed: BUG: unable to handle kernel paging request in late_resume_init run #13: boot failed: can't ssh into the instance run #14: boot failed: can't ssh into the instance run #15: boot failed: general protection fault in rcu_core run #16: boot failed: BUG: spinlock bad magic in blk_mq_request_bypass_insert run #17: boot failed: can't ssh into the instance run #18: boot failed: general protection fault in alloc_vmap_area run #19: boot failed: general protection fault in evdev_open unable to determine the verdict: 0 good runs (wanted 15), for bad wanted 10 in total, got 0 # git bisect skip 14a4d22ead0d9c01a6d7e9cb7f1d321dd29d354b Bisecting: 76679 revisions left to test after this (roughly 16 steps) [2bca25eaeba6190efbfcb38ed169bd7ee43b5aaf] Merge tag 'spi-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 2bca25eaeba6190efbfcb38ed169bd7ee43b5aaf gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a2a148752e7df3e5d0135f4fa425634cab2948b553f5a2e37b3d680cac95ca26 run #0: crashed: INFO: task hung in ext4_stop_mmpd run #1: crashed: INFO: task hung in ext4_stop_mmpd run #2: crashed: INFO: task hung in ext4_stop_mmpd run #3: crashed: INFO: task hung in ext4_stop_mmpd run #4: crashed: INFO: task hung in ext4_stop_mmpd run #5: crashed: INFO: task hung in ext4_stop_mmpd run #6: crashed: INFO: task hung in ext4_stop_mmpd run #7: crashed: INFO: task hung in ext4_stop_mmpd run #8: crashed: INFO: task hung in ext4_stop_mmpd run #9: crashed: INFO: task hung in ext4_stop_mmpd run #10: crashed: INFO: task hung in ext4_stop_mmpd run #11: crashed: INFO: task hung in ext4_stop_mmpd run #12: crashed: INFO: task hung in ext4_stop_mmpd run #13: crashed: INFO: task hung in ext4_stop_mmpd run #14: crashed: INFO: task hung in ext4_stop_mmpd run #15: crashed: INFO: task hung in ext4_stop_mmpd run #16: OK run #17: crashed: INFO: task hung in ext4_stop_mmpd run #18: OK run #19: OK representative crash: INFO: task hung in ext4_stop_mmpd, types: [HANG] # git bisect good 2bca25eaeba6190efbfcb38ed169bd7ee43b5aaf Bisecting: 35897 revisions left to test after this (roughly 15 steps) [307e14c039063f0c9bd7a18a7add8f940580dcc9] Merge tag '6.3-rc-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6 determine whether the revision contains the guilty commit revision 36b99942d4770e91d58e7578480db2be8e059c80 crashed and is reachable testing commit 307e14c039063f0c9bd7a18a7add8f940580dcc9 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c50c840dc2088a927b01a943efc59ee082124dcae7a9dfb6a1c4582431c4349a all runs: OK false negative chance: 0.000 # git bisect bad 307e14c039063f0c9bd7a18a7add8f940580dcc9 Bisecting: 17467 revisions left to test after this (roughly 14 steps) [a594533df0f6ca391da003f43d53b336a2d23ffa] Merge tag 'drm-next-2022-12-13' of git://anongit.freedesktop.org/drm/drm determine whether the revision contains the guilty commit revision 36b99942d4770e91d58e7578480db2be8e059c80 crashed and is reachable testing commit a594533df0f6ca391da003f43d53b336a2d23ffa gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fb0ca360452b057573ba7f64b7d287d89a2ae3928c0fcc87a6e98c7912136db0 run #0: basic kernel testing failed: INFO: rcu detected stall in corrupted run #1: basic kernel testing failed: INFO: rcu detected stall in corrupted run #2: basic kernel testing failed: INFO: rcu detected stall in corrupted run #3: crashed: INFO: rcu detected stall in corrupted run #4: crashed: INFO: rcu detected stall in corrupted run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: rcu detected stall in corrupted, types: [HANG] unable to determine the verdict: 15 good runs (wanted 15), for bad wanted 10 in total, got 17 # git bisect skip a594533df0f6ca391da003f43d53b336a2d23ffa Bisecting: 17467 revisions left to test after this (roughly 14 steps) [2662b3f93d2617719e68bbb1031491461afa2812] net: microchip: vcap: Add vcap_mod_rule determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 2662b3f93d2617719e68bbb1031491461afa2812 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 117c55ee2931e0d58d0964e21a74f9b02ac938f35197b67a5804b9e1ded0e03d all runs: OK false negative chance: 0.000 # git bisect bad 2662b3f93d2617719e68bbb1031491461afa2812 Bisecting: 6755 revisions left to test after this (roughly 13 steps) [cdf072acb5baa18e5b05bdf3f13d6481f62396fc] Merge tag 'trace-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace determine whether the revision contains the guilty commit revision 14a4d22ead0d9c01a6d7e9cb7f1d321dd29d354b crashed and is reachable testing commit cdf072acb5baa18e5b05bdf3f13d6481f62396fc gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c7dfac8554430c6980c6f6b804c79148211660fef96dec2edf2a94b45eb00488 all runs: OK false negative chance: 0.000 # git bisect bad cdf072acb5baa18e5b05bdf3f13d6481f62396fc Bisecting: 3369 revisions left to test after this (roughly 12 steps) [76e45035348c247a70ed50eb29a9906657e4444f] Merge tag 'for-6.1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux determine whether the revision contains the guilty commit revision 2bca25eaeba6190efbfcb38ed169bd7ee43b5aaf crashed and is reachable testing commit 76e45035348c247a70ed50eb29a9906657e4444f gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: df7d6a0041af77e7edf961bad7756f3726da412ce0325f4c5b1de55016d031a6 run #0: basic kernel testing failed: INFO: rcu detected stall in corrupted run #1: crashed: INFO: rcu detected stall in corrupted run #2: crashed: INFO: task hung in ext4_stop_mmpd run #3: crashed: INFO: task hung in ext4_stop_mmpd run #4: crashed: INFO: task hung in ext4_stop_mmpd run #5: crashed: INFO: task hung in ext4_stop_mmpd run #6: crashed: INFO: task hung in ext4_stop_mmpd run #7: crashed: INFO: task hung in ext4_stop_mmpd run #8: crashed: INFO: task hung in ext4_stop_mmpd run #9: crashed: INFO: task hung in ext4_stop_mmpd run #10: crashed: INFO: task hung in ext4_stop_mmpd run #11: crashed: INFO: task hung in ext4_stop_mmpd run #12: OK run #13: crashed: INFO: task hung in ext4_stop_mmpd run #14: OK run #15: OK run #16: OK run #17: OK run #18: crashed: INFO: task hung in ext4_stop_mmpd run #19: OK representative crash: INFO: rcu detected stall in corrupted, types: [HANG] # git bisect good 76e45035348c247a70ed50eb29a9906657e4444f Bisecting: 1791 revisions left to test after this (roughly 11 steps) [e8bc52cb8df80c31c73c726ab58ea9746e9ff734] Merge tag 'driver-core-6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core determine whether the revision contains the guilty commit revision 2bca25eaeba6190efbfcb38ed169bd7ee43b5aaf crashed and is reachable testing commit e8bc52cb8df80c31c73c726ab58ea9746e9ff734 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 048f2ed8b99ebf342b49d0f17a389ecc4e2a7a9c2b717e0c112f4727c308e174 run #0: crashed: INFO: rcu detected stall in corrupted run #1: crashed: INFO: task hung in ext4_stop_mmpd run #2: crashed: INFO: task hung in ext4_stop_mmpd run #3: crashed: INFO: task hung in ext4_stop_mmpd run #4: crashed: INFO: task hung in ext4_stop_mmpd run #5: crashed: INFO: task hung in ext4_stop_mmpd run #6: crashed: INFO: task hung in ext4_stop_mmpd run #7: crashed: INFO: task hung in ext4_stop_mmpd run #8: crashed: INFO: task hung in ext4_stop_mmpd run #9: crashed: INFO: task hung in ext4_stop_mmpd run #10: crashed: INFO: task hung in ext4_stop_mmpd run #11: crashed: INFO: task hung in ext4_stop_mmpd run #12: crashed: INFO: task hung in ext4_stop_mmpd run #13: crashed: INFO: task hung in ext4_stop_mmpd run #14: crashed: INFO: task hung in ext4_stop_mmpd run #15: crashed: INFO: task hung in ext4_stop_mmpd run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: rcu detected stall in corrupted, types: [HANG] # git bisect good e8bc52cb8df80c31c73c726ab58ea9746e9ff734 Bisecting: 759 revisions left to test after this (roughly 10 steps) [bdc753c7fcb4eb009ae246a188ea7ac6dac98ce1] Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux determine whether the revision contains the guilty commit revision 36b99942d4770e91d58e7578480db2be8e059c80 crashed and is reachable testing commit bdc753c7fcb4eb009ae246a188ea7ac6dac98ce1 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 06af73bd7754054252087d23b454df4fd85f94e6e11325b058f2a339ea87b002 run #0: basic kernel testing failed: INFO: rcu detected stall in corrupted run #1: crashed: INFO: rcu detected stall in corrupted run #2: crashed: INFO: task hung in ext4_stop_mmpd run #3: crashed: INFO: task hung in ext4_stop_mmpd run #4: crashed: INFO: task hung in ext4_stop_mmpd run #5: crashed: INFO: task hung in ext4_stop_mmpd run #6: crashed: INFO: task hung in ext4_stop_mmpd run #7: crashed: INFO: task hung in ext4_stop_mmpd run #8: crashed: INFO: task hung in ext4_stop_mmpd run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: rcu detected stall in corrupted, types: [HANG] # git bisect good bdc753c7fcb4eb009ae246a188ea7ac6dac98ce1 Bisecting: 372 revisions left to test after this (roughly 9 steps) [4899a36f91a9f9b06878471096bd143e7253006d] Merge tag 'powerpc-6.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 4899a36f91a9f9b06878471096bd143e7253006d gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3278d4829d10e8e7e1a26f3d6cede50782023fbbcc1129568174dec92676018a run #0: crashed: INFO: task hung in ext4_stop_mmpd run #1: crashed: INFO: task hung in ext4_stop_mmpd run #2: crashed: INFO: task hung in ext4_stop_mmpd run #3: crashed: INFO: task hung in ext4_stop_mmpd run #4: crashed: INFO: task hung in ext4_stop_mmpd run #5: crashed: INFO: task hung in ext4_stop_mmpd run #6: crashed: INFO: task hung in ext4_stop_mmpd run #7: crashed: INFO: task hung in ext4_stop_mmpd run #8: crashed: INFO: task hung in ext4_stop_mmpd run #9: crashed: INFO: task hung in ext4_stop_mmpd run #10: crashed: INFO: task hung in ext4_stop_mmpd run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: crashed: INFO: task hung in ext4_stop_mmpd representative crash: INFO: task hung in ext4_stop_mmpd, types: [HANG] # git bisect good 4899a36f91a9f9b06878471096bd143e7253006d Bisecting: 196 revisions left to test after this (roughly 8 steps) [55be6084c8e0e0ada9278c2ab60b7a584378efda] Merge tag 'timers-core-2022-10-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 55be6084c8e0e0ada9278c2ab60b7a584378efda gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c5567eec4a70c673972574b9b8afda343f8ea0e70724b170e3e33664d75be055 all runs: OK false negative chance: 0.000 # git bisect bad 55be6084c8e0e0ada9278c2ab60b7a584378efda Bisecting: 99 revisions left to test after this (roughly 7 steps) [82aad7ff7ac25c8cf09d491ae23b9823f1901486] perf/hw_breakpoint: Annotate tsk->perf_event_mutex vs ctx->mutex determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 82aad7ff7ac25c8cf09d491ae23b9823f1901486 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2ba65df139ed824bb272afbd628b5ce723f24d1a62cdff0f74cd33fca409d51a run #0: crashed: INFO: rcu detected stall in corrupted run #1: crashed: INFO: task hung in ext4_stop_mmpd run #2: crashed: INFO: task hung in ext4_stop_mmpd run #3: crashed: INFO: task hung in ext4_stop_mmpd run #4: crashed: INFO: task hung in ext4_stop_mmpd run #5: crashed: INFO: task hung in ext4_stop_mmpd run #6: crashed: INFO: task hung in ext4_stop_mmpd run #7: crashed: INFO: task hung in ext4_stop_mmpd run #8: crashed: INFO: task hung in ext4_stop_mmpd run #9: crashed: INFO: task hung in ext4_stop_mmpd run #10: crashed: INFO: task hung in ext4_stop_mmpd run #11: crashed: INFO: task hung in ext4_stop_mmpd run #12: crashed: INFO: task hung in ext4_stop_mmpd run #13: crashed: INFO: task hung in ext4_stop_mmpd run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: rcu detected stall in corrupted, types: [HANG] # git bisect good 82aad7ff7ac25c8cf09d491ae23b9823f1901486 Bisecting: 46 revisions left to test after this (roughly 6 steps) [30c999937f69abf935b0228b8411713737377d9e] Merge tag 'sched-core-2022-10-07' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip determine whether the revision contains the guilty commit revision bdc753c7fcb4eb009ae246a188ea7ac6dac98ce1 crashed and is reachable testing commit 30c999937f69abf935b0228b8411713737377d9e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8f5439c9c922fd51fc5af5573f7bc226717ab3beb4b25ac5c7d42469784a024b run #0: crashed: INFO: rcu detected stall in corrupted run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: rcu detected stall in corrupted, types: [HANG] unable to determine the verdict: 19 good runs (wanted 15), for bad wanted 10 in total, got 20 # git bisect skip 30c999937f69abf935b0228b8411713737377d9e Bisecting: 46 revisions left to test after this (roughly 6 steps) [eaa1a955094b20ca4b1c5064200d140b27f8d96f] clocksource/drivers/renesas-ostm: Add support for RZ/V2L SoC determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit eaa1a955094b20ca4b1c5064200d140b27f8d96f gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9bd078c3ee0fea95a7cc2f11732810a081f3ba854dd70f311d9263171816a943 all runs: basic kernel testing failed: INFO: trying to register non-static key in ieee80211_do_stop unable to determine the verdict: 0 good runs (wanted 15), for bad wanted 10 in total, got 0 # git bisect skip eaa1a955094b20ca4b1c5064200d140b27f8d96f Bisecting: 46 revisions left to test after this (roughly 6 steps) [8eeeed9c4a791f0d1f2ea830eb75a4246c117ae2] sched/fair: Remove useless check in select_idle_core() determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 8eeeed9c4a791f0d1f2ea830eb75a4246c117ae2 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 08968efc2bfb105612b9a54bff96c6b4e8501e8a83723c002eadf9f63e79a12e run #0: crashed: INFO: rcu detected stall in corrupted run #1: crashed: INFO: task hung in ext4_stop_mmpd run #2: crashed: INFO: task hung in ext4_stop_mmpd run #3: crashed: INFO: task hung in ext4_stop_mmpd run #4: crashed: INFO: task hung in ext4_stop_mmpd run #5: crashed: INFO: task hung in ext4_stop_mmpd run #6: crashed: INFO: task hung in ext4_stop_mmpd run #7: crashed: INFO: task hung in ext4_stop_mmpd run #8: crashed: INFO: task hung in ext4_stop_mmpd run #9: crashed: INFO: task hung in ext4_stop_mmpd run #10: crashed: INFO: task hung in ext4_stop_mmpd run #11: crashed: INFO: task hung in ext4_stop_mmpd run #12: crashed: INFO: task hung in ext4_stop_mmpd run #13: crashed: INFO: task hung in ext4_stop_mmpd run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: rcu detected stall in corrupted, types: [HANG] # git bisect good 8eeeed9c4a791f0d1f2ea830eb75a4246c117ae2 Bisecting: 36 revisions left to test after this (roughly 5 steps) [3e71f0167b3db4e4b3d0d8353c375f6587323052] Merge tag 'locking-core-2022-10-07' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip determine whether the revision contains the guilty commit revision bdc753c7fcb4eb009ae246a188ea7ac6dac98ce1 crashed and is reachable testing commit 3e71f0167b3db4e4b3d0d8353c375f6587323052 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6dc6801a35602b408bc8569da4a9db042fd6aabb639c428f4b714ab6a1afcb3e all runs: OK false negative chance: 0.000 # git bisect bad 3e71f0167b3db4e4b3d0d8353c375f6587323052 Bisecting: 20 revisions left to test after this (roughly 4 steps) [fdf756f7127185eeffe00e918e66dfee797f3625] sched: Fix more TASK_state comparisons determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit fdf756f7127185eeffe00e918e66dfee797f3625 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9319eae78471d7193325ba635fb851e14d20e7015b014eaa079ed32c8d78d142 run #0: basic kernel testing failed: INFO: rcu detected stall in corrupted run #1: crashed: INFO: task hung in ext4_stop_mmpd run #2: crashed: INFO: task hung in ext4_stop_mmpd run #3: crashed: INFO: task hung in ext4_stop_mmpd run #4: crashed: INFO: task hung in ext4_stop_mmpd run #5: crashed: INFO: task hung in ext4_stop_mmpd run #6: crashed: INFO: task hung in ext4_stop_mmpd run #7: crashed: INFO: task hung in ext4_stop_mmpd run #8: crashed: INFO: task hung in ext4_stop_mmpd run #9: crashed: INFO: task hung in ext4_stop_mmpd run #10: crashed: INFO: task hung in ext4_stop_mmpd run #11: crashed: INFO: task hung in ext4_stop_mmpd run #12: crashed: INFO: task hung in ext4_stop_mmpd run #13: crashed: INFO: task hung in ext4_stop_mmpd run #14: OK run #15: OK run #16: OK run #17: crashed: INFO: task hung in ext4_stop_mmpd run #18: OK run #19: OK representative crash: INFO: task hung in ext4_stop_mmpd, types: [HANG] # git bisect good fdf756f7127185eeffe00e918e66dfee797f3625 Bisecting: 9 revisions left to test after this (roughly 3 steps) [76e64c73db9542ff4bae8a60f4f32e38f3799b95] locking/lockdep: Print more debug information - report name and key when look_up_lock_class() got confused determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 76e64c73db9542ff4bae8a60f4f32e38f3799b95 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e67439e03c3b157cff72dc67096fc70f244a40a4a0fa432e73ca001eb332cc18 run #0: crashed: INFO: rcu detected stall in corrupted run #1: crashed: INFO: task hung in ext4_stop_mmpd run #2: crashed: INFO: task hung in ext4_stop_mmpd run #3: crashed: INFO: task hung in ext4_stop_mmpd run #4: crashed: INFO: task hung in ext4_stop_mmpd run #5: crashed: INFO: task hung in ext4_stop_mmpd run #6: crashed: INFO: task hung in ext4_stop_mmpd run #7: crashed: INFO: task hung in ext4_stop_mmpd run #8: crashed: INFO: task hung in ext4_stop_mmpd run #9: crashed: INFO: task hung in ext4_stop_mmpd run #10: crashed: INFO: task hung in ext4_stop_mmpd run #11: crashed: INFO: task hung in ext4_stop_mmpd run #12: crashed: INFO: task hung in ext4_stop_mmpd run #13: crashed: INFO: task hung in ext4_stop_mmpd run #14: crashed: INFO: task hung in ext4_stop_mmpd run #15: crashed: INFO: task hung in ext4_stop_mmpd run #16: crashed: INFO: task hung in ext4_stop_mmpd run #17: OK run #18: OK run #19: OK representative crash: INFO: rcu detected stall in corrupted, types: [HANG] # git bisect good 76e64c73db9542ff4bae8a60f4f32e38f3799b95 Bisecting: 4 revisions left to test after this (roughly 3 steps) [e572410e47a4e9647d5d7a49ca699a1497378707] Merge tag 'signal-for-v5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit e572410e47a4e9647d5d7a49ca699a1497378707 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fd3255fca5aa9d69bcd911c018e20801934acc1a6596424427d72ed817c82438 all runs: OK false negative chance: 0.000 # git bisect bad e572410e47a4e9647d5d7a49ca699a1497378707 Bisecting: 3 revisions left to test after this (roughly 2 steps) [86fb9c53d82f1dadf960553a3bd351de6173911f] Merge tag 'retire_mq_sysctls-for-v5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 86fb9c53d82f1dadf960553a3bd351de6173911f gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f5a7ebf5bf874d9811cc81574563eec57b153dd8d04cca934670a93abbeb5d66 all runs: OK false negative chance: 0.000 # git bisect bad 86fb9c53d82f1dadf960553a3bd351de6173911f Bisecting: 1 revision left to test after this (roughly 1 step) [c71370bde7dbd3aefae0c2e8dd643d68fb2c51c8] Merge tag 'interrupting_kthread_stop-for-v5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace determine whether the revision contains the guilty commit revision 4899a36f91a9f9b06878471096bd143e7253006d crashed and is reachable testing commit c71370bde7dbd3aefae0c2e8dd643d68fb2c51c8 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 13d74d6e3a9d9ddb469e43ae441c4d22a1d43099d3f12a16bf653d8247c7a4a5 run #0: crashed: INFO: rcu detected stall in corrupted run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: rcu detected stall in corrupted, types: [HANG] unable to determine the verdict: 19 good runs (wanted 15), for bad wanted 10 in total, got 20 # git bisect skip c71370bde7dbd3aefae0c2e8dd643d68fb2c51c8 Bisecting: 1 revision left to test after this (roughly 1 step) [a7c01fa93aeb03ab76cd3cb2107990dd160498e6] signal: break out of wait loops on kthread_stop() determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit a7c01fa93aeb03ab76cd3cb2107990dd160498e6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 709ca887c27a6eb0568ab33cb407dee2075f10a3ba4a9b5a3818484479d4805d all runs: OK false negative chance: 0.000 # git bisect bad a7c01fa93aeb03ab76cd3cb2107990dd160498e6 a7c01fa93aeb03ab76cd3cb2107990dd160498e6 is the first bad commit commit a7c01fa93aeb03ab76cd3cb2107990dd160498e6 Author: Jason A. Donenfeld Date: Tue Jul 12 01:21:23 2022 +0200 signal: break out of wait loops on kthread_stop() I was recently surprised to learn that msleep_interruptible(), wait_for_completion_interruptible_timeout(), and related functions simply hung when I called kthread_stop() on kthreads using them. The solution to fixing the case with msleep_interruptible() was more simply to move to schedule_timeout_interruptible(). Why? The reason is that msleep_interruptible(), and many functions just like it, has a loop like this: while (timeout && !signal_pending(current)) timeout = schedule_timeout_interruptible(timeout); The call to kthread_stop() woke up the thread, so schedule_timeout_ interruptible() returned early, but because signal_pending() returned true, it went back into another timeout, which was never woken up. This wait loop pattern is common to various pieces of code, and I suspect that the subtle misuse in a kthread that caused a deadlock in the code I looked at last week is also found elsewhere. So this commit causes signal_pending() to return true when kthread_stop() is called, by setting TIF_NOTIFY_SIGNAL. The same also probably applies to the similar kthread_park() functionality, but that can be addressed later, as its semantics are slightly different. Cc: Eric W. Biederman Signed-off-by: Jason A. Donenfeld v1: https://lkml.kernel.org/r/20220627120020.608117-1-Jason@zx2c4.com v2: https://lkml.kernel.org/r/20220627145716.641185-1-Jason@zx2c4.com v3: https://lkml.kernel.org/r/20220628161441.892925-1-Jason@zx2c4.com v4: https://lkml.kernel.org/r/20220711202136.64458-1-Jason@zx2c4.com v5: https://lkml.kernel.org/r/20220711232123.136330-1-Jason@zx2c4.com Signed-off-by: Eric W. Biederman kernel/kthread.c | 1 + 1 file changed, 1 insertion(+) accumulated error probability: 0.00 parent commit f2906aa863381afb0015a9eb7fefad885d4e5a56 wasn't tested testing commit f2906aa863381afb0015a9eb7fefad885d4e5a56 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2a5abd05151e9473a5c530cf066d35ed1b55610afd35df62e78bcddd9513653a culprit signature: 709ca887c27a6eb0568ab33cb407dee2075f10a3ba4a9b5a3818484479d4805d parent signature: 2a5abd05151e9473a5c530cf066d35ed1b55610afd35df62e78bcddd9513653a reproducer is flaky (0.61 repro chance estimate) revisions tested: 33, total time: 11h26m35.137746103s (build: 4h30m10.532570062s, test: 6h33m27.60872651s) first good commit: a7c01fa93aeb03ab76cd3cb2107990dd160498e6 signal: break out of wait loops on kthread_stop() recipients (to): ["ebiederm@xmission.com" "jason@zx2c4.com"] recipients (cc): []