ci2 starts bisection 2025-04-29 07:28:19.296996209 +0000 UTC m=+45852.079317794 bisecting fixing commit since 0c935c049b5c196b83b968c72d348ae6fff83ea2 building syzkaller on e28266709dd2a1d1452d4a5bbf271700e10335c6 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 run #0: crashed: INFO: rcu detected stall in gc_worker run #1: crashed: INFO: rcu detected stall in gc_worker run #2: crashed: INFO: rcu detected stall in addrconf_dad_work run #3: crashed: INFO: rcu detected stall in neigh_periodic_work run #4: crashed: INFO: rcu detected stall in vfs_write run #5: crashed: INFO: rcu detected stall in cleanup_net run #6: crashed: INFO: rcu detected stall in wb_workfn run #7: crashed: INFO: rcu detected stall in rtnl_newlink run #8: crashed: INFO: rcu detected stall in wb_workfn run #9: crashed: INFO: rcu detected stall in gc_worker run #10: crashed: INFO: rcu detected stall in batadv_nc_worker run #11: crashed: INFO: rcu detected stall in gc_worker run #12: crashed: INFO: rcu detected stall in gc_worker run #13: crashed: INFO: task hung in __netlink_dump_start run #14: crashed: INFO: task hung in netlink_dump run #15: crashed: INFO: task hung in netdev_run_todo run #16: crashed: INFO: rcu detected stall in rtnl_newlink run #17: crashed: INFO: rcu detected stall in handle_softirqs run #18: crashed: no output from test machine run #19: crashed: no output from test machine representative crash: INFO: rcu detected stall in gc_worker, types: [HANG] check whether we can drop unnecessary instrumentation disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 0c935c049b5c196b83b968c72d348ae6fff83ea2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5d224d533f5629e984ea42e649cf2abd5ba7a5e3453181e156db56e21496e9eb run #0: crashed: INFO: rcu detected stall in sys_readlink run #1: crashed: INFO: rcu detected stall in newfstatat run #2: crashed: INFO: rcu detected stall in addrconf_dad_work run #3: crashed: INFO: rcu detected stall in security_file_open run #4: crashed: INFO: rcu detected stall in gc_worker run #5: crashed: INFO: rcu detected stall in smp_call_function run #6: crashed: INFO: rcu detected stall in iterate_cleanup_work run #7: crashed: INFO: rcu detected stall in gc_worker run #8: crashed: INFO: rcu detected stall in corrupted run #9: crashed: no output from test machine representative crash: INFO: rcu detected stall in sys_readlink, types: [HANG] the bug reproduces without the instrumentation disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], they are not needed kconfig minimization: base=3707 full=7306 leaves diff=2041 split chunks (needed=false): <2041> split chunk #0 of len 2041 into 5 parts testing without sub-chunk 1/5 disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], 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: d69a09f0c238b1a7fe54cd155886db22c5c52940aefe6f7c845f8bad823fc977 run #0: crashed: INFO: rcu detected stall in syscall_enter_from_user_mode run #1: crashed: INFO: task hung in nsim_dev_trap_report_work run #2: crashed: INFO: task hung in nsim_dev_trap_report_work run #3: crashed: INFO: task hung in nsim_dev_trap_report_work run #4: crashed: INFO: rcu detected stall in do_idle run #5: crashed: INFO: rcu detected stall in corrupted run #6: crashed: INFO: rcu detected stall in do_idle run #7: crashed: INFO: rcu detected stall in corrupted 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 syscall_enter_from_user_mode, 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 run #0: crashed: INFO: task hung in nsim_dev_trap_report_work run #1: crashed: INFO: rcu detected stall in sys_unshare run #2: crashed: INFO: rcu detected stall in do_idle run #3: crashed: INFO: rcu detected stall in gc_worker run #4: crashed: INFO: rcu detected stall in corrupted run #5: crashed: INFO: rcu detected stall in gc_worker run #6: crashed: INFO: task hung in genl_rcv_msg run #7: crashed: INFO: rcu detected stall in smp_call_function run #8: crashed: INFO: rcu detected stall in corrupted run #9: crashed: BUG: soft lockup in smp_call_function representative crash: INFO: task hung in nsim_dev_trap_report_work, 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 0c935c049b5c196b83b968c72d348ae6fff83ea2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: dc0739bdd2101725a1b4262d246ac42554201552f3a37d653356380f62de7878 all runs: OK false negative chance: 0.000 testing without sub-chunk 4/5 disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed testing commit 0c935c049b5c196b83b968c72d348ae6fff83ea2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 747bb6f1a61cd620a2fc4f25a7fb74c9b49d6e0a2ddb99caf9cd29805e149bed run #0: crashed: INFO: rcu detected stall in gc_worker run #1: crashed: INFO: rcu detected stall in smp_call_function run #2: crashed: INFO: rcu detected stall in rtnetlink_rcv_msg run #3: crashed: INFO: task hung in nsim_dev_trap_report_work run #4: crashed: INFO: rcu detected stall in sys_execve run #5: crashed: INFO: rcu detected stall in do_idle run #6: crashed: INFO: rcu detected stall in smp_call_function run #7: crashed: INFO: rcu detected stall in tun_chr_close run #8: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #9: OK representative crash: INFO: rcu detected stall in gc_worker, 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 0c935c049b5c196b83b968c72d348ae6fff83ea2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 10ba9dd5f2d1e564ca801228d2dfc30e861b5036cf4986f8e806ebaa10c2b187 run #0: crashed: INFO: rcu detected stall in do_idle run #1: crashed: INFO: rcu detected stall in smp_call_function run #2: crashed: INFO: rcu detected stall in do_idle run #3: crashed: INFO: rcu detected stall in __do_munmap run #4: crashed: INFO: rcu detected stall in do_idle run #5: crashed: INFO: rcu detected stall in do_idle run #6: crashed: INFO: rcu detected stall in do_idle run #7: crashed: INFO: rcu detected stall in gc_worker run #8: crashed: INFO: rcu detected stall in do_idle run #9: OK representative crash: INFO: rcu detected stall in do_idle, types: [HANG] the chunk can be dropped minimized to 409 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 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 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 [BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed determining the merge base between 0c935c049b5c196b83b968c72d348ae6fff83ea2 and ca91b9500108d4cf083a635c2e11c884d5dd20ea 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 run #0: crashed: INFO: rcu detected stall in net_tx_action run #1: crashed: INFO: rcu detected stall in corrupted run #2: crashed: INFO: rcu detected stall in net_tx_action run #3: crashed: INFO: rcu detected stall in net_tx_action run #4: crashed: INFO: rcu detected stall in tc_modify_qdisc 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 net_tx_action run #8: crashed: BUG: soft lockup in do_idle run #9: crashed: INFO: rcu detected stall in corrupted representative crash: INFO: rcu detected stall in net_tx_action, types: [HANG] testing current HEAD ca91b9500108d4cf083a635c2e11c884d5dd20ea testing commit ca91b9500108d4cf083a635c2e11c884d5dd20ea gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: b86354d0b5824288bef8e4e97b9052ad71cea5fb5c73cedb8803e3867bf8eed6 all runs: OK false negative chance: 0.000 # git bisect start ca91b9500108d4cf083a635c2e11c884d5dd20ea 8bb7eca972ad531c9b149c0a51ab43a417385813 Bisecting: 153803 revisions left to test after this (roughly 17 steps) [a8d70602b186f3c347e62c59a418be802b71886d] Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit a8d70602b186f3c347e62c59a418be802b71886d gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: 919918a350263eb8f2ef69d2d436a723a0719c8e5be39d1237e581ce41372aae run #0: crashed: INFO: rcu detected stall in gc_worker run #1: crashed: INFO: rcu detected stall in net_tx_action run #2: crashed: INFO: rcu detected stall in corrupted run #3: crashed: INFO: rcu detected stall in newfstatat run #4: crashed: BUG: soft lockup in smp_call_function run #5: crashed: INFO: rcu detected stall in corrupted run #6: crashed: BUG: soft lockup in do_idle run #7: crashed: INFO: rcu detected stall in tc_modify_qdisc run #8: crashed: INFO: rcu detected stall in corrupted run #9: crashed: no output from test machine representative crash: INFO: rcu detected stall in gc_worker, types: [HANG] # git bisect good a8d70602b186f3c347e62c59a418be802b71886d Bisecting: 76926 revisions left to test after this (roughly 16 steps) [ff2632d7d08edc11e8bd0629e9fcfebab25c78b4] Merge tag 'powerpc-6.10-1' 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 ff2632d7d08edc11e8bd0629e9fcfebab25c78b4 gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: 1a68f1c8bb925c0e3b72e51ce4a9b0c84b8e2dbda82e352eea2cf25baf844d4a run #0: crashed: INFO: rcu detected stall in corrupted run #1: crashed: INFO: rcu detected stall in corrupted run #2: crashed: INFO: rcu detected stall in do_idle run #3: crashed: INFO: rcu detected stall in do_syscall_64 run #4: crashed: INFO: rcu detected stall in smp_call_function run #5: crashed: INFO: rcu detected stall in corrupted run #6: crashed: INFO: rcu detected stall in do_idle run #7: crashed: BUG: soft lockup in do_idle run #8: crashed: INFO: rcu detected stall in tc_modify_qdisc run #9: OK representative crash: INFO: rcu detected stall in corrupted, types: [HANG] # git bisect good ff2632d7d08edc11e8bd0629e9fcfebab25c78b4 Bisecting: 38425 revisions left to test after this (roughly 15 steps) [9f5a6a1fe690a43896e0235377c7eb0b657c05a9] Merge tag 'media/v6.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 9f5a6a1fe690a43896e0235377c7eb0b657c05a9 gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: 6aa52a1f7c29960ef294a8d9028d9a45b7d1522f35dc76ce4c4d0501ac58b14f all runs: OK false negative chance: 0.000 # git bisect bad 9f5a6a1fe690a43896e0235377c7eb0b657c05a9 Bisecting: 19244 revisions left to test after this (roughly 14 steps) [183d46ff422ef9f3d755b6808ef3faa6d009ba3a] Merge tag 'net-6.11-rc2' of 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 183d46ff422ef9f3d755b6808ef3faa6d009ba3a gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: 29733556fcc1d60f8a7ab6066f4e5bf9c15248134d3459f2c5343711cf266de3 all runs: OK false negative chance: 0.000 # git bisect bad 183d46ff422ef9f3d755b6808ef3faa6d009ba3a Bisecting: 10393 revisions left to test after this (roughly 13 steps) [0434dbe32053d07d658165be681505120c6b1abc] Merge tag 'linux_kselftest-next-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 0434dbe32053d07d658165be681505120c6b1abc gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: 95cd8906e835f5d2b230dc96eeb10f8b2ab4e87963a1e29536497dfe048ee6da all runs: OK false negative chance: 0.000 # git bisect bad 0434dbe32053d07d658165be681505120c6b1abc Bisecting: 4442 revisions left to test after this (roughly 12 steps) [2faf6332c506fc3bd23815f8fe8f6d0c35271c17] Merge tag 'tomoyo-pr-20240606' of git://git.code.sf.net/p/tomoyo/tomoyo determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 2faf6332c506fc3bd23815f8fe8f6d0c35271c17 gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: 53c04e5d6c3091904093c5ae1b1412df24000db21b106ff82806d7310f30fe16 all runs: OK false negative chance: 0.000 # git bisect bad 2faf6332c506fc3bd23815f8fe8f6d0c35271c17 Bisecting: 2213 revisions left to test after this (roughly 11 steps) [8053d2ffc4502bbb50a78c805d964e65a6de1803] Merge tag 'phy-for-6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/phy/linux-phy determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 8053d2ffc4502bbb50a78c805d964e65a6de1803 gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: c9358c29b6977c7ca9475c0a491e9fa9dcd299dce2e838e07806eff1ae433c38 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 do_idle run #3: crashed: INFO: rcu detected stall in do_idle run #4: crashed: INFO: rcu detected stall in corrupted run #5: crashed: INFO: rcu detected stall in do_idle run #6: crashed: INFO: rcu detected stall in proc_reg_read_iter run #7: crashed: INFO: rcu detected stall in do_idle run #8: crashed: INFO: rcu detected stall in do_idle run #9: crashed: no output from test machine representative crash: INFO: rcu detected stall in syscall_exit_to_user_mode, types: [HANG] # git bisect good 8053d2ffc4502bbb50a78c805d964e65a6de1803 Bisecting: 1242 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 ff2632d7d08edc11e8bd0629e9fcfebab25c78b4 crashed and is reachable testing commit d90be6e4aaf23cd4a2c202891399cbafe669aaab gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: afb958aa4ea01550c8aff1a9605afb3f042ab7125510e9e4665632eb731e6cdb run #0: crashed: INFO: rcu detected stall in corrupted run #1: crashed: INFO: rcu detected stall in sys_utimensat run #2: crashed: INFO: rcu detected stall in corrupted run #3: crashed: INFO: rcu detected stall in vma_link_file run #4: crashed: INFO: rcu detected stall in do_idle run #5: crashed: INFO: rcu detected stall in sys_openat run #6: crashed: INFO: rcu detected stall in smp_call_function run #7: crashed: INFO: rcu detected stall in do_idle run #8: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #9: crashed: BUG: soft lockup in corrupted representative crash: INFO: rcu detected stall in corrupted, types: [HANG] # git bisect good d90be6e4aaf23cd4a2c202891399cbafe669aaab Bisecting: 623 revisions left to test after this (roughly 9 steps) [c40b1994b9ffb45e19e6d83b7655d7b9db0174c3] Merge tag 'bcachefs-2024-05-24' of https://evilpiepirate.org/git/bcachefs determine whether the revision contains the guilty commit revision 8053d2ffc4502bbb50a78c805d964e65a6de1803 crashed and is reachable testing commit c40b1994b9ffb45e19e6d83b7655d7b9db0174c3 gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: 9225144a98a392918f8765843c87528b7ab044f8f367cff40ad161b572b6281f run #0: crashed: INFO: rcu detected stall in do_idle run #1: crashed: INFO: rcu detected stall in corrupted run #2: crashed: INFO: rcu detected stall in corrupted run #3: crashed: INFO: rcu detected stall in do_idle run #4: crashed: INFO: rcu detected stall in do_idle 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 do_idle run #8: crashed: no output from test machine run #9: crashed: INFO: task hung in addrconf_dad_work representative crash: INFO: rcu detected stall in do_idle, types: [HANG] # git bisect good c40b1994b9ffb45e19e6d83b7655d7b9db0174c3 Bisecting: 322 revisions left to test after this (roughly 8 steps) [d8ec19857b095b39d114ae299713bd8ea6c1e66a] Merge tag 'net-6.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net determine whether the revision contains the guilty commit revision 8053d2ffc4502bbb50a78c805d964e65a6de1803 crashed and is reachable testing commit d8ec19857b095b39d114ae299713bd8ea6c1e66a gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: bdda60f25ab8eb4a8f366c8bd6d3b04d4d07be918d61dded4930662c75f0362e all runs: OK false negative chance: 0.000 # git bisect bad d8ec19857b095b39d114ae299713bd8ea6c1e66a Bisecting: 147 revisions left to test after this (roughly 7 steps) [74eca356f6d4429497a097a8ed4dfa76c441bab9] Merge tag 'ceph-for-6.10-rc1' of https://github.com/ceph/ceph-client determine whether the revision contains the guilty commit revision 8053d2ffc4502bbb50a78c805d964e65a6de1803 crashed and is reachable testing commit 74eca356f6d4429497a097a8ed4dfa76c441bab9 gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: 572cd65dbfc8757c47cf79760394f4f9f615ab85af8814d341b19f2f82c8467f run #0: crashed: INFO: rcu detected stall in sys_sendto 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 corrupted run #4: crashed: INFO: rcu detected stall in do_idle run #5: crashed: INFO: rcu detected stall in call_usermodehelper_exec_async run #6: crashed: INFO: rcu detected stall in smp_call_function run #7: crashed: INFO: rcu detected stall in do_idle run #8: crashed: INFO: rcu detected stall in do_idle run #9: crashed: no output from test machine representative crash: INFO: rcu detected stall in sys_sendto, types: [HANG] # git bisect good 74eca356f6d4429497a097a8ed4dfa76c441bab9 Bisecting: 73 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 8053d2ffc4502bbb50a78c805d964e65a6de1803 crashed and is reachable testing commit e889eb17f456176843ad7d8b24152b5989cd5c1e gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: 18e6e5eb1f8b157528a2442271041b784951eb3cf87cc497a961ae91c078ae5f 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 a8d70602b186f3c347e62c59a418be802b71886d crashed and is reachable testing commit f4dca95fc0f6350918f2e6727e35b41f7f86fcce gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: c79932292e98802faf651092f3d327e31bac4eee6ed5c115657b5d110daecd24 run #0: crashed: INFO: rcu detected stall in sys_sendto run #1: crashed: INFO: rcu detected stall in do_idle run #2: crashed: INFO: rcu detected stall in do_idle run #3: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #4: crashed: INFO: rcu detected stall in do_idle run #5: crashed: INFO: rcu detected stall in rtnetlink_rcv_msg run #6: crashed: INFO: rcu detected stall in corrupted run #7: crashed: INFO: rcu detected stall in worker_thread run #8: crashed: INFO: rcu detected stall in do_idle run #9: crashed: BUG: soft lockup in smp_call_function representative crash: INFO: rcu detected stall in sys_sendto, 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 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit fb66df20a7201e60f2b13d7f95d031b31a8831d3 gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: 91a46cdc1da9c8b63644e9f124b6c0c981e18bf266b5dc86aec9506e58b3b1c3 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 f4dca95fc0f6350918f2e6727e35b41f7f86fcce crashed and is reachable testing commit 5597613fb3cf0e36d26cfd8fb2a63196da249333 gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: 3f42cd94c1b0319c786de4827c56dddb916930bfea6cc85dc7c4c53d9b3cf563 run #0: crashed: INFO: rcu detected stall in smp_call_function 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 sys_exit_group run #4: crashed: INFO: rcu detected stall in do_idle run #5: crashed: BUG: soft lockup in do_idle run #6: crashed: INFO: rcu detected stall in do_idle run #7: crashed: INFO: rcu detected stall in corrupted run #8: crashed: INFO: rcu detected stall in do_idle run #9: crashed: BUG: soft lockup in sys_exit_group representative crash: INFO: rcu detected stall in smp_call_function, types: [HANG] # 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 a8d70602b186f3c347e62c59a418be802b71886d crashed and is reachable testing commit 6e15774d92056f7e4d226b2fc758124a6c803f99 gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: ae92ed528b5dec524b00712aef804f21fd16ade4387b67edef9bc837271217ad run #0: crashed: INFO: rcu detected stall in sys_getsockopt run #1: crashed: INFO: rcu detected stall in tc_modify_qdisc run #2: crashed: INFO: rcu detected stall in do_idle run #3: crashed: INFO: rcu detected stall in sys_exit_group run #4: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #5: crashed: INFO: rcu detected stall in pte_alloc_one run #6: crashed: INFO: rcu detected stall in corrupted run #7: crashed: INFO: rcu detected stall in corrupted run #8: crashed: INFO: rcu detected stall in do_idle run #9: crashed: no output from test machine representative crash: INFO: rcu detected stall in sys_getsockopt, 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 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 4b4647add7d3c8530493f7247d11e257ee425bf0 gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: 09b64e7edb5f98ae43eb51b9b994984d00660a969816474a12745c81ea2ced35 run #0: crashed: INFO: rcu detected stall in corrupted run #1: crashed: INFO: rcu detected stall in smp_call_function run #2: crashed: BUG: soft lockup in do_idle run #3: crashed: INFO: rcu detected stall in do_idle run #4: crashed: INFO: rcu detected stall in smp_call_function run #5: crashed: INFO: rcu detected stall in do_idle run #6: crashed: INFO: rcu detected stall in smp_call_function run #7: crashed: INFO: rcu detected stall in do_idle run #8: crashed: INFO: task hung in addrconf_dad_work run #9: crashed: no output from test machine 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 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: ffeefb2e69b2dc3b188131f49088ab181a95c1885283b5a29150ef25d37ae4dd 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 6e15774d92056f7e4d226b2fc758124a6c803f99 crashed and is reachable testing commit 56a5cf538c3f2d935b0d81040a8303b6e7fc5fd8 gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: cf5a67ff7c1ebdab807c237cbae17c47dcf9e04948fc910fa26f21aea01f09a4 run #0: crashed: INFO: rcu detected stall in sys_exit_group run #1: crashed: INFO: rcu detected stall in tc_modify_qdisc run #2: crashed: INFO: rcu detected stall in corrupted run #3: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode run #4: crashed: INFO: rcu detected stall in do_idle run #5: crashed: INFO: rcu detected stall in do_idle run #6: crashed: INFO: rcu detected stall in do_idle run #7: crashed: BUG: soft lockup in do_idle 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_exit_group, types: [HANG] # git bisect good 56a5cf538c3f2d935b0d81040a8303b6e7fc5fd8 e634134180885574d1fe7aa162777ba41e7fcd5b is the first bad commit commit e634134180885574d1fe7aa162777ba41e7fcd5b Author: Vladimir Oltean 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 Reviewed-by: Eric Dumazet Link: https://lore.kernel.org/r/20240527153955.553333-1-vladimir.oltean@nxp.com Signed-off-by: Jakub Kicinski 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: ffeefb2e69b2dc3b188131f49088ab181a95c1885283b5a29150ef25d37ae4dd parent signature: cf5a67ff7c1ebdab807c237cbae17c47dcf9e04948fc910fa26f21aea01f09a4 revisions tested: 28, total time: 9h30m5.043768612s (build: 4h38m31.912983526s, test: 4h34m12.918009837s) 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): []