ci starts bisection 2025-11-22 01:23:17.289592353 +0000 UTC m=+41891.588987893 bisecting cause commit starting from e2c20036a8879476c88002730d8a27f4e3c32d4b building syzkaller on c31c1b0b7447502cdda234f0f43ab793644ffe83 ensuring issue is reproducible on original commit e2c20036a8879476c88002730d8a27f4e3c32d4b testing commit e2c20036a8879476c88002730d8a27f4e3c32d4b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 28c96340457a46a9497cf42212b9b492750c6902b33b4c138f51c00904d5f694 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: basic kernel testing failed: SYZFAIL: failed to recv rpc run #6: basic kernel testing failed: SYZFAIL: failed to recv rpc run #7: basic kernel testing failed: SYZFAIL: failed to recv rpc run #8: crashed: divide error in __tcp_select_window run #9: crashed: divide error in __tcp_select_window run #10: crashed: divide error in __tcp_select_window run #11: crashed: divide error in __tcp_select_window run #12: crashed: divide error in __tcp_select_window run #13: crashed: divide error in __tcp_select_window run #14: crashed: divide error in __tcp_select_window run #15: crashed: divide error in __tcp_select_window run #16: crashed: divide error in __tcp_select_window run #17: crashed: divide error in __tcp_select_window run #18: crashed: divide error in __tcp_select_window run #19: crashed: divide error in __tcp_select_window representative crash: divide error in __tcp_select_window, types: [DoS] check whether we can drop unnecessary instrumentation disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit e2c20036a8879476c88002730d8a27f4e3c32d4b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: e6f67b1453ca2cf9c3991cc45da0619afc6b9106be809eb7ce12c55456c2b3d7 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: crashed: divide error in __tcp_select_window run #4: crashed: divide error in __tcp_select_window run #5: crashed: divide error in __tcp_select_window run #6: crashed: divide error in __tcp_select_window run #7: crashed: divide error in __tcp_select_window run #8: crashed: divide error in __tcp_select_window run #9: crashed: divide error in __tcp_select_window representative crash: divide error in __tcp_select_window, types: [DoS] the bug reproduces without the instrumentation disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed kconfig minimization: base=4116 full=8533 leaves diff=2157 split chunks (needed=false): <2157> split chunk #0 of len 2157 into 5 parts testing without sub-chunk 1/5 disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep hang], they are not needed testing commit e2c20036a8879476c88002730d8a27f4e3c32d4b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: f2439b71c21c9194a01ae83d935355100f1a02c0271d567f6fa86a38bafea900 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: crashed: divide error in __tcp_select_window run #5: crashed: divide error in __tcp_select_window run #6: crashed: divide error in __tcp_select_window run #7: crashed: divide error in __tcp_select_window run #8: crashed: divide error in __tcp_select_window run #9: crashed: divide error in __tcp_select_window representative crash: divide error in __tcp_select_window, types: [DoS] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit e2c20036a8879476c88002730d8a27f4e3c32d4b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: ee944f3b1924cf7b49093672b27eca060471af0a686f5c3277713b8c7973f60c run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: crashed: divide error in __tcp_select_window run #2: crashed: divide error in __tcp_select_window run #3: crashed: divide error in __tcp_select_window run #4: crashed: divide error in __tcp_select_window run #5: crashed: divide error in __tcp_select_window run #6: crashed: divide error in __tcp_select_window run #7: crashed: divide error in __tcp_select_window run #8: crashed: divide error in __tcp_select_window run #9: crashed: divide error in __tcp_select_window representative crash: divide error in __tcp_select_window, types: [DoS] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit e2c20036a8879476c88002730d8a27f4e3c32d4b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: e61152e2bb0a58556f29ee4bd12140bf6afcf18d83fed40def82d0969dc0e325 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK false negative chance: 0.000 testing without sub-chunk 4/5 disabling configs for [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit e2c20036a8879476c88002730d8a27f4e3c32d4b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 540d93d370072efc6b77d00bda13006a3d00eee58755521fe0bd9014e1651b88 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: crashed: divide error in __tcp_select_window run #5: crashed: divide error in __tcp_select_window run #6: crashed: divide error in __tcp_select_window run #7: crashed: divide error in __tcp_select_window run #8: crashed: divide error in __tcp_select_window run #9: crashed: divide error in __tcp_select_window representative crash: divide error in __tcp_select_window, types: [DoS] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep hang], they are not needed testing commit e2c20036a8879476c88002730d8a27f4e3c32d4b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: a28131f8110353646f8c8dc2de333cee84b8488f8f447d3045448b13bb7f8cbc run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: crashed: divide error in __tcp_select_window run #6: crashed: divide error in __tcp_select_window run #7: crashed: divide error in __tcp_select_window run #8: crashed: divide error in __tcp_select_window run #9: crashed: divide error in __tcp_select_window representative crash: divide error in __tcp_select_window, types: [DoS] the chunk can be dropped minimized to 432 configs; suspects: [AX25 BRIDGE BRIDGE_NETFILTER CAN CFG80211 CHECKPOINT_RESTORE DVB_CORE FB_CORE HAMRADIO HID_LOGITECH HSR INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_USER_ACCESS INPUT_JOYSTICK INPUT_MOUSE IP6_NF_IPTABLES_LEGACY IP6_NF_MANGLE IP6_NF_RAW IPV6_MULTIPLE_TABLES IP_NF_FILTER IP_NF_IPTABLES_LEGACY IP_NF_MANGLE IP_NF_NAT IP_NF_RAW IP_NF_TARGET_ECN IP_NF_TARGET_MASQUERADE IP_NF_TARGET_NETMAP IP_NF_TARGET_REDIRECT IP_NF_TARGET_REJECT IP_NF_TARGET_SYNPROXY IP_NF_TARGET_TTL IP_ROUTE_CLASSID IP_SET IP_SET_BITMAP_IP IP_SET_BITMAP_IPMAC IP_SET_BITMAP_PORT IP_SET_HASH_IP IP_SET_HASH_IPMAC IP_SET_HASH_IPMARK IP_SET_HASH_IPPORT IP_SET_HASH_IPPORTIP IP_SET_HASH_IPPORTNET IP_SET_HASH_MAC IP_SET_HASH_NET IP_SET_HASH_NETIFACE IP_SET_HASH_NETNET IP_SET_HASH_NETPORT IP_SET_HASH_NETPORTNET IP_SET_LIST_SET IP_VS IP_VS_DH IP_VS_FO IP_VS_FTP IP_VS_IPV6 IP_VS_LBLC IP_VS_LBLCR IP_VS_LC IP_VS_MH IP_VS_NFCT IP_VS_NQ IP_VS_OVF IP_VS_PE_SIP IP_VS_PROTO_AH IP_VS_PROTO_AH_ESP IP_VS_PROTO_ESP IP_VS_PROTO_SCTP IP_VS_PROTO_TCP IP_VS_PROTO_UDP IP_VS_RR IP_VS_SED IP_VS_SH IP_VS_TWOS IP_VS_WLC IP_VS_WRR IRQ_BYPASS_MANAGER IRQ_POLL IR_IGORPLUGUSB IR_IGUANA IR_IMON IR_IMON_RAW IR_MCEUSB IR_REDRAT3 IR_STREAMZAP IR_TOY IR_TTUSBIR ISDN ISDN_CAPI 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_COMMON KVM_COMPAT KVM_ELIDE_TLB_FLUSH_IF_YOUNG KVM_GENERIC_DIRTYLOG_READ_PROTECT KVM_GENERIC_HARDWARE_ENABLING KVM_GENERIC_MEMORY_ATTRIBUTES KVM_GENERIC_MMU_NOTIFIER KVM_GENERIC_PRE_FAULT_MEMORY KVM_GUEST_MEMFD KVM_HYPERV KVM_IOAPIC KVM_MMIO KVM_MMU_LOCKLESS_AGING KVM_PROVE_MMU KVM_SW_PROTECTED_VM KVM_VFIO KVM_X86 KVM_XEN L2TP L2TP_ETH L2TP_IP L2TP_V3 LAPB LAPBETHER LDM_PARTITION LEDS_CLASS_MULTICOLOR LEGACY_PTYS LIBNVDIMM LINEAR_RANGES LLC LLC2 LOGIG940_FF LOGIRUMBLEPAD2_FF LOGITECH_FF LOGIWHEELS_FF LOGO LOGO_LINUX_MONO LOGO_LINUX_VGA16 LPC_ICH LWTUNNEL LWTUNNEL_BPF LZ4HC_COMPRESS LZ4_COMPRESS MAC80211 MAC80211_HAS_RC MAC80211_HWSIM MAC80211_MESH MAC80211_RC_DEFAULT_MINSTREL MAC80211_RC_MINSTREL MACSEC MACVLAN MACVTAP MAC_PARTITION MAPPING_DIRTY_HELPERS MCTP MDIO_MVUSB MD_RAID0 MD_RAID1 MD_RAID10 MD_RAID456 MEDIA_ANALOG_TV_SUPPORT MEDIA_ATTACH MEDIA_CONTROLLER MEDIA_CONTROLLER_DVB MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_SUPPORT_FILTER MEDIA_TUNER MEDIA_TUNER_MSI001 MEMORY_BALLOON MEMORY_HOTPLUG MEMORY_ISOLATION MEMREGION MEMSTICK MEMSTICK_REALTEK_USB MEM_SOFT_DIRTY MFD_CORE MFD_SYSCON MHI_BUS MHI_WWAN_CTRL MHP_DEFAULT_ONLINE_TYPE_ONLINE_AUTO 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 MM_ID MODULE_SRCVERSION_ALL 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_BTT ND_CLAIM ND_PFN NETDEVSIM NETFILTER_ADVANCED NETFILTER_BPF_LINK NETFILTER_FAMILY_ARP NETFILTER_FAMILY_BRIDGE NETFILTER_NETLINK_ACCT NETFILTER_NETLINK_GLUE_CT NETFILTER_NETLINK_OSF NETFILTER_NETLINK_QUEUE NETFILTER_SYNPROXY NETFILTER_XTABLES_COMPAT NETFILTER_XTABLES_LEGACY 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_NAT 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 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_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_FLOW NET_CLS_FLOWER NET_CLS_FW NET_CLS_MATCHALL NET_CLS_ROUTE4 NET_CRC32C 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_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_MQPRIO_LIB 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_SHAPER 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_VENDOR_MUCSE 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_CT NFT_DUP_IPV4 NFT_DUP_IPV6 NFT_DUP_NETDEV NFT_EXTHDR_DCCP 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_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_OVS NF_CONNTRACK_PPTP NF_CONNTRACK_SANE NF_CONNTRACK_TFTP NF_CONNTRACK_TIMEOUT NF_CONNTRACK_TIMESTAMP NF_CONNTRACK_ZONES NF_CT_NETLINK_HELPER NF_CT_NETLINK_TIMEOUT NF_CT_PROTO_GRE NF_CT_PROTO_SCTP NF_CT_PROTO_UDPLITE NF_FLOW_TABLE NF_TABLES NF_TABLES_BRIDGE NF_TABLES_INET NF_TABLES_IPV4 NF_TABLES_IPV6 NF_TABLES_NETDEV PARTITION_ADVANCED PSAMPLE RC_CORE RC_DEVICES RFKILL SPI USB_GADGET USB_MUSB_HDRC VIDEO_DEV WAN WATCH_QUEUE WIRELESS WLAN WWAN X25] disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed picked [v6.17 v6.16 v6.15 v6.13 v6.11 v6.9 v6.7 v6.5 v6.2 v5.19 v5.16 v5.13 v5.10 v5.7 v5.4 v5.1 v4.19] out of 40 release tags testing release v6.17 testing commit e5f0a698b34ed76002dc5cff3804a61c80233a7a gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5b8f2f2bea20f712a69211b63ab3548139e00572ec9dc2f900b2a52f5e37c484 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK false negative chance: 0.000 # git bisect start e2c20036a8879476c88002730d8a27f4e3c32d4b e5f0a698b34ed76002dc5cff3804a61c80233a7a Bisecting: 7105 revisions left to test after this (roughly 13 steps) [07fdad3a93756b872da7b53647715c48d0f4a2d0] Merge tag 'net-next-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next testing commit 07fdad3a93756b872da7b53647715c48d0f4a2d0 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0a38d8e8d75a3e357ddd537241eab0ba7beab18db08ada1e4ff399357c523ad2 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK false negative chance: 0.000 # git bisect good 07fdad3a93756b872da7b53647715c48d0f4a2d0 Bisecting: 3508 revisions left to test after this (roughly 12 steps) [522ba450b56fff29f868b1552bdc2965f55de7ed] Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux testing commit 522ba450b56fff29f868b1552bdc2965f55de7ed gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 66dd10f634de86a1bd17e413cfb8a620b4e6805125fcaf1893c22b341e071dcb run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK false negative chance: 0.000 # git bisect good 522ba450b56fff29f868b1552bdc2965f55de7ed Bisecting: 1784 revisions left to test after this (roughly 11 steps) [dc77806cf3b4788d328fddf245e86c5b529f31a2] Merge tag 'rust-fixes-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux testing commit dc77806cf3b4788d328fddf245e86c5b529f31a2 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 67af9a9193e9df05d9e1c1415af7c07234cc43d75f4091396c6a524705f7cddd run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc 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 false negative chance: 0.000 # git bisect good dc77806cf3b4788d328fddf245e86c5b529f31a2 Bisecting: 899 revisions left to test after this (roughly 10 steps) [f694d215d34035cc64b1d176fd82db0d1f2428d4] net: stmmac: always allocate mac_device_info testing commit f694d215d34035cc64b1d176fd82db0d1f2428d4 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5abaa5df9743cbeedc77dacb98636c34fc106d2d39629b0220ee3903967e241d run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK false negative chance: 0.000 # git bisect good f694d215d34035cc64b1d176fd82db0d1f2428d4 Bisecting: 449 revisions left to test after this (roughly 9 steps) [391dad2e686f214932f769847cc8603a7df389eb] net/mlx5e: Recover SQ on excessive PTP TX timestamp delta testing commit 391dad2e686f214932f769847cc8603a7df389eb gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 344fb818e9447957728f06d14cb9ee8e56977e6bbc7a749e6ac411229837782c run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK false negative chance: 0.000 # git bisect good 391dad2e686f214932f769847cc8603a7df389eb Bisecting: 229 revisions left to test after this (roughly 8 steps) [2df79e4d729cc67395db2fd6965148fea0851898] Merge tag 'fixes-2025-11-19' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock testing commit 2df79e4d729cc67395db2fd6965148fea0851898 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0c51051bf860d3d75ab089f50e587ed2d5ac2cbb1af5766249b17b663f2d3741 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK false negative chance: 0.000 # git bisect good 2df79e4d729cc67395db2fd6965148fea0851898 Bisecting: 121 revisions left to test after this (roughly 7 steps) [8e621c9a337555c914cf1664605edfaa6f839774] Merge tag 'net-6.18-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net testing commit 8e621c9a337555c914cf1664605edfaa6f839774 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 127a59f1d03e5d92cafe473955f2063c6956916f34b92e21c45c84583c6fda58 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: crashed: divide error in __tcp_select_window run #3: crashed: divide error in __tcp_select_window run #4: crashed: divide error in __tcp_select_window run #5: crashed: divide error in __tcp_select_window run #6: crashed: divide error in __tcp_select_window run #7: crashed: divide error in __tcp_select_window run #8: crashed: divide error in __tcp_select_window run #9: crashed: divide error in __tcp_select_window representative crash: divide error in __tcp_select_window, types: [DoS] # git bisect bad 8e621c9a337555c914cf1664605edfaa6f839774 Bisecting: 53 revisions left to test after this (roughly 6 steps) [23cb64fb76257309e396ea4cec8396d4a1dbae68] Merge tag 'soc-fixes-6.18-3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc testing commit 23cb64fb76257309e396ea4cec8396d4a1dbae68 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: cc6ce51fddc02db85d0aac4237f7fcd3f47849d4182a7819f3ac01756b3a48ee run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK false negative chance: 0.000 # git bisect good 23cb64fb76257309e396ea4cec8396d4a1dbae68 Bisecting: 26 revisions left to test after this (roughly 5 steps) [d47515af6cccd7484d8b0870376858c9848a18ec] net/mlx5: Clean up only new IRQ glue on request_irq() failure testing commit d47515af6cccd7484d8b0870376858c9848a18ec gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: fe82ce812b5088a8368914414ede75765d9cafa4cfa497e7da5d5710baad0fee run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK false negative chance: 0.000 # git bisect good d47515af6cccd7484d8b0870376858c9848a18ec Bisecting: 13 revisions left to test after this (roughly 4 steps) [0e4ec14dc1ee4b1ec347729c225c3ca950f2bcf6] selftests: mptcp: join: userspace: longer timeout testing commit 0e4ec14dc1ee4b1ec347729c225c3ca950f2bcf6 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 2aa1b06f6b60ac07b4856af7205eba9493b399605875fcca3c3c74e39a6d098e run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: crashed: divide error in __tcp_select_window run #5: crashed: divide error in __tcp_select_window run #6: crashed: divide error in __tcp_select_window run #7: crashed: divide error in __tcp_select_window run #8: crashed: divide error in __tcp_select_window run #9: crashed: divide error in __tcp_select_window representative crash: divide error in __tcp_select_window, types: [DoS] # git bisect bad 0e4ec14dc1ee4b1ec347729c225c3ca950f2bcf6 Bisecting: 6 revisions left to test after this (roughly 3 steps) [4f102d747cadd8f595f2b25882eed9bec1675fb1] mptcp: avoid unneeded subflow-level drops testing commit 4f102d747cadd8f595f2b25882eed9bec1675fb1 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: b26d9ccf6a68f059cbbe50b041f0fa7c7ffc4adc47ff09a92975a6bd80a446ba run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK false negative chance: 0.000 # git bisect good 4f102d747cadd8f595f2b25882eed9bec1675fb1 Bisecting: 3 revisions left to test after this (roughly 2 steps) [fff0c87996672816a84c3386797a5e69751c5888] mptcp: decouple mptcp fastclose from tcp close testing commit fff0c87996672816a84c3386797a5e69751c5888 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: d8e049bbabf077c637716f4c7c041fae1eb8bccac9d0bd155ecfde80ab17a9b4 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK false negative chance: 0.000 # git bisect good fff0c87996672816a84c3386797a5e69751c5888 Bisecting: 1 revision left to test after this (roughly 1 step) [efff6cd53ac52827948298043270bb81ff17fdff] selftests: mptcp: join: fastclose: remove flaky marks testing commit efff6cd53ac52827948298043270bb81ff17fdff gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: dfc136587d65794549110777094b5f9b52877e3481614ea514645c409848659b run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: crashed: divide error in __tcp_select_window run #4: crashed: divide error in __tcp_select_window run #5: crashed: divide error in __tcp_select_window run #6: crashed: divide error in __tcp_select_window run #7: crashed: divide error in __tcp_select_window run #8: crashed: divide error in __tcp_select_window run #9: crashed: divide error in __tcp_select_window representative crash: divide error in __tcp_select_window, types: [DoS] # git bisect bad efff6cd53ac52827948298043270bb81ff17fdff Bisecting: 0 revisions left to test after this (roughly 0 steps) [ae155060247be8dcae3802a95bd1bdf93ab3215d] mptcp: fix duplicate reset on fastclose testing commit ae155060247be8dcae3802a95bd1bdf93ab3215d gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: bbcf5771c4fd7099d11a37bba4128fe637a9ab2e89ebc252fe1eed20b6eb36d8 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: crashed: divide error in __tcp_select_window run #6: crashed: divide error in __tcp_select_window run #7: crashed: divide error in __tcp_select_window run #8: crashed: divide error in __tcp_select_window run #9: crashed: divide error in __tcp_select_window representative crash: divide error in __tcp_select_window, types: [DoS] # git bisect bad ae155060247be8dcae3802a95bd1bdf93ab3215d ae155060247be8dcae3802a95bd1bdf93ab3215d is the first bad commit commit ae155060247be8dcae3802a95bd1bdf93ab3215d Author: Paolo Abeni Date: Tue Nov 18 08:20:24 2025 +0100 mptcp: fix duplicate reset on fastclose The CI reports sporadic failures of the fastclose self-tests. The root cause is a duplicate reset, not carrying the relevant MPTCP option. In the failing scenario the bad reset is received by the peer before the fastclose one, preventing the reception of the latter. Indeed there is window of opportunity at fastclose time for the following race: mptcp_do_fastclose __mptcp_close_ssk __tcp_close() tcp_set_state() [1] tcp_send_active_reset() [2] After [1] the stack will send reset to in-flight data reaching the now closed port. Such reset may race with [2]. Address the issue explicitly sending a single reset on fastclose before explicitly moving the subflow to close status. Fixes: d21f83485518 ("mptcp: use fastclose on more edge scenarios") Cc: stable@vger.kernel.org Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/596 Signed-off-by: Paolo Abeni Reviewed-by: Geliang Tang Reviewed-by: Matthieu Baerts (NGI0) Signed-off-by: Matthieu Baerts (NGI0) Link: https://patch.msgid.link/20251118-net-mptcp-misc-fixes-6-18-rc6-v1-6-806d3781c95f@kernel.org Signed-off-by: Jakub Kicinski net/mptcp/protocol.c | 36 +++++++++++++++++++++++------------- 1 file changed, 23 insertions(+), 13 deletions(-) accumulated error probability: 0.00 culprit signature: bbcf5771c4fd7099d11a37bba4128fe637a9ab2e89ebc252fe1eed20b6eb36d8 parent signature: d8e049bbabf077c637716f4c7c041fae1eb8bccac9d0bd155ecfde80ab17a9b4 revisions tested: 22, total time: 8h6m5.448993441s (build: 5h11m56.317455382s, test: 2h22m21.039186119s) first bad commit: ae155060247be8dcae3802a95bd1bdf93ab3215d mptcp: fix duplicate reset on fastclose recipients (to): ["geliang@kernel.org" "kuba@kernel.org" "matttbe@kernel.org" "pabeni@redhat.com"] recipients (cc): [] crash: divide error in __tcp_select_window RBP: 00007fb1d483f090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fb1d4c26038 R14: 00007fb1d4c25fa0 R15: 00007ffd240913d8 Oops: divide error: 0000 [#1] SMP PTI CPU: 0 UID: 0 PID: 4366 Comm: syz.2.17 Not tainted syzkaller #0 PREEMPT(none) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:__tcp_select_window+0x386/0x660 net/ipv4/tcp_output.c:3333 Code: 0c b8 ff ff ff ff 44 89 e9 d3 e0 89 c1 f7 d1 41 01 cc 41 21 c4 e9 83 00 00 00 e8 55 bd 97 fe eb 79 e8 4e bd 97 fe 44 89 e0 99 fd 41 29 d4 eb 6c e8 3e bd 97 fe eb 65 e8 37 bd 97 fe 44 8b 64 RSP: 0018:ffffc90001c4bb00 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88810ab8b700 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffc90001c4bbd0 R09: 0000000000000053 R10: 0000000000000000 R11: ffffffff81378d10 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fb1d483f6c0(0000) GS:ffff8882b28e9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000180 CR3: 000000010b3b2000 CR4: 00000000003506f0 Call Trace: tcp_select_window net/ipv4/tcp_output.c:280 [inline] __tcp_transmit_skb+0x543/0x12a0 net/ipv4/tcp_output.c:1565 tcp_transmit_skb net/ipv4/tcp_output.c:1646 [inline] tcp_send_active_reset+0x172/0x2b0 net/ipv4/tcp_output.c:3828 mptcp_do_fastclose+0x114/0x150 net/mptcp/protocol.c:2790 mptcp_disconnect+0x102/0x210 net/mptcp/protocol.c:3250 mptcp_sendmsg_fastopen+0x15b/0x1e0 net/mptcp/protocol.c:1773 mptcp_sendmsg+0x95d/0xa30 net/mptcp/protocol.c:1852 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x59/0xf0 net/socket.c:742 __sys_sendto+0x2fd/0x3d0 net/socket.c:2244 __do_sys_sendto net/socket.c:2251 [inline] __se_sys_sendto net/socket.c:2247 [inline] __x64_sys_sendto+0x28/0x40 net/socket.c:2247 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x8f/0x250 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb1d49cf749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb1d483f038 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fb1d4c25fa0 RCX: 00007fb1d49cf749 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007fb1d483f090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fb1d4c26038 R14: 00007fb1d4c25fa0 R15: 00007ffd240913d8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__tcp_select_window+0x386/0x660 net/ipv4/tcp_output.c:3333 Code: 0c b8 ff ff ff ff 44 89 e9 d3 e0 89 c1 f7 d1 41 01 cc 41 21 c4 e9 83 00 00 00 e8 55 bd 97 fe eb 79 e8 4e bd 97 fe 44 89 e0 99 fd 41 29 d4 eb 6c e8 3e bd 97 fe eb 65 e8 37 bd 97 fe 44 8b 64 RSP: 0018:ffffc90001c4bb00 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88810ab8b700 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffc90001c4bbd0 R09: 0000000000000053 R10: 0000000000000000 R11: ffffffff81378d10 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fb1d483f6c0(0000) GS:ffff8882b28e9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000180 CR3: 000000010b3b2000 CR4: 00000000003506f0 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: b8 ff ff ff ff mov $0xffffffff,%eax 5: 44 89 e9 mov %r13d,%ecx 8: d3 e0 shl %cl,%eax a: 89 c1 mov %eax,%ecx c: f7 d1 not %ecx e: 41 01 cc add %ecx,%r12d 11: 41 21 c4 and %eax,%r12d 14: e9 83 00 00 00 jmp 0x9c 19: e8 55 bd 97 fe call 0xfe97bd73 1e: eb 79 jmp 0x99 20: e8 4e bd 97 fe call 0xfe97bd73 25: 44 89 e0 mov %r12d,%eax 28: 99 cltd * 29: f7 fd idiv %ebp <-- trapping instruction 2b: 41 29 d4 sub %edx,%r12d 2e: eb 6c jmp 0x9c 30: e8 3e bd 97 fe call 0xfe97bd73 35: eb 65 jmp 0x9c 37: e8 37 bd 97 fe call 0xfe97bd73 3c: 44 rex.R 3d: 8b .byte 0x8b 3e: 64 fs