Syzkaller hit 'panic: Assertion sb->sb_hiwat >= sb->sb_ccc + sb->sb_ctl failed at /home/markj/sb/main/src/sys/kern/uipc_usrreq.c:LINE' bug. login: panic: Assertion sb->sb_hiwat >= sb->sb_ccc + sb->sb_ctl failed at /home/markj/sb/main/src/sys/kern/uipc_usrreq.c:1055 cpuid = 1 time = 1742991771 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0xc6/frame 0xfffffe0057543330 kdb_backtrace() at kdb_backtrace+0xd0/frame 0xfffffe0057543490 vpanic() at vpanic+0x257/frame 0xfffffe0057543650 panic() at panic+0xb5/frame 0xfffffe0057543710 uipc_sosend_stream_or_seqpacket() at uipc_sosend_stream_or_seqpacket+0x1120/frame 0xfffffe00575439a0 sousrsend() at sousrsend+0x112/frame 0xfffffe0057543a30 kern_sendit() at kern_sendit+0x4fe/frame 0xfffffe0057543b90 sendit() at sendit+0x15f/frame 0xfffffe0057543bf0 sys_sendto() at sys_sendto+0x181/frame 0xfffffe0057543d10 amd64_syscall() at amd64_syscall+0x4af/frame 0xfffffe0057543f30 fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe0057543f30 --- syscall (0, FreeBSD ELF64, syscall), rip = 0x2496da, rsp = 0x8243acf58, rbp = 0x8243acf80 --- KDB: enter: panic [ thread pid 1260 tid 100716 ] Stopped at kdb_enter+0x6e: movq $0,0x23dc7d7(%rip) db> db> set $lines = 0 db> set $maxwidth = 0 db> x/s version version: FreeBSD 15.0-CURRENT #32 glebius-unix-stream-n275986-2f157fe85977: Sat Mar 22 23:59:54 UTC 2025\012 markj@xinde:/home/markj/sb/main/bricoler/freebsd-src-build/obj.amd64.amd64/home/markj/sb/main/src/amd64.amd64/sys/SYZKALLER\012 db> show registers cs 0x20 ds 0x3b es 0x3b fs 0x13 gs 0x1b ss 0x28 rax 0x12 rcx 0xfffffe00033ef038 rdx 0xdffff7c000000000 rbx 0xffffffff82728180 .str.27 rsp 0xfffffe0057543470 rbp 0xfffffe0057543490 rsi 0 rdi 0xffffffff82e004c0 panicstr r8 0 r9 0xffffffff r10 0x100000000018e r11 0xfffffe005491a520 r12 0xfffffe005491a000 r13 0xfffffffffffffffd r14 0xffffffff82728180 .str.27 r15 0 rip 0xffffffff815bd83e kdb_enter+0x6e rflags 0x46 kdb_enter+0x6e: movq $0,0x23dc7d7(%rip) db> show proc Process 1260 (syz-executor1361750) at 0xfffffe0054905ac0: state: NORMAL uid: 0 gids: 0, 0, 5 parent: pid 962 at 0xfffffe0054906020 ABI: FreeBSD ELF64 flag: 0x10000080 flag2: 0 arguments: /root/syz-executor1361750249 reaper: 0xfffffe0008007040 reapsubtree: 1 sigparent: 20 vmspace: 0xfffffe00548bc920 (map 0xfffffe00548bc920) (map.pmap 0xfffffe00548bc9c0) (pmap 0xfffffe00548bca30) threads: 3 100126 Run CPU 0 syz-executor1361750 100715 S uwait 0xfffffe006dbff600 syz-executor1361750 100716 Run CPU 1 syz-executor1361750 db> ps pid ppid pgrp uid state wmesg wchan cmd 1260 962 962 0 R (threaded) syz-executor1361750 100126 Run CPU 0 syz-executor1361750 100715 S uwait 0xfffffe006dbff600 syz-executor1361750 100716 Run CPU 1 syz-executor1361750 962 959 962 0 Ss nanslp 0xffffffff8397b3c0 syz-executor1361750 959 957 957 0 S select 0xfffffe0007fcf6c0 sshd-session 957 921 957 0 Ss select 0xfffffe0007fcf840 sshd-session 940 1 940 0 Ss+ ttyin 0xfffffe0058364cb0 getty 925 1 925 0 Ss nanslp 0xffffffff8397b3c0 cron 921 1 921 0 Ss select 0xfffffe005814c1c0 sshd 803 1 803 0 Ss select 0xfffffe0007fcfbc0 syslogd 802 1 799 0 S select 0xfffffe0007fcfa40 syslogd 799 1 799 0 Ss select 0xfffffe0007fcf9c0 syslogd 590 1 590 0 Ss select 0xfffffe0007fcfac0 devd 376 1 376 65 Ss select 0xfffffe005814c240 dhclient 352 1 352 0 Ss select 0xfffffe0007fcfb40 dhclient 349 1 349 0 Ss select 0xfffffe005814c340 dhclient 156 0 0 0 DL pftm 0xffffffff848dc3e0 [pf purge] 146 0 0 0 DL (threaded) [ng_queue] 100089 D sleep 0xffffffff8489ff00 [ng_queue0] 100093 D sleep 0xffffffff8489ff00 [ng_queue1] 15 0 0 0 DL syncer 0xffffffff83a98be0 [syncer] 9 0 0 0 DL vlruwt 0xfffffe0008026b00 [vnlru] 8 0 0 0 DL (threaded) [bufdaemon] 100065 D psleep 0xffffffff83a971c0 [bufdaemon] 100068 D - 0xffffffff82e02140 [bufspacedaemon-0] 100085 D sdflush 0xfffffe006c025ce8 [/ worker] 7 0 0 0 DL psleep 0xffffffff83ad7c20 [vmdaemon] 6 0 0 0 DL (threaded) [pagedaemon] 100063 D psleep 0xffffffff83abdbb8 [dom0] 100069 D launds 0xffffffff83abdbc4 [laundry: dom0] 100070 D umarcl 0xffffffff81d65c30 [uma] 5 0 0 0 DL - 0xffffffff836f8bd0 [rand_harvestq] 4 0 0 0 DL (threaded) [cam] 100044 D - 0xffffffff836c3340 [doneq0] 100045 D - 0xffffffff836c32c0 [async] 100062 D - 0xffffffff836c3140 [scanner] 3 0 0 0 DL (threaded) [crypto] 100041 D crypto_ 0xffffffff83ab9420 [crypto] 100042 D crypto_ 0xfffffe0054766e30 [crypto returns 0] 100043 D crypto_ 0xfffffe0054766e80 [crypto returns 1] 14 0 0 0 DL seqstat 0xfffffe0007f59c88 [sequencer 00] 13 0 0 0 DL (threaded) [geom] 100035 D - 0xffffffff83923da0 [g_event] 100036 D - 0xffffffff83923dc0 [g_up] 100037 D - 0xffffffff83923de0 [g_down] 2 0 0 0 WL (threaded) [clock] 100031 I [clock (0)] 100032 I [clock (1)] 12 0 0 0 WL (threaded) [intr] 100013 I [swi6: task queue] 100014 I [swi6: Giant taskq] 100016 I [swi5: fast taskq] 100033 I [swi1: netisr 0] 100046 I [irq40: virtio_pci0] 100047 I [irq41: virtio_pci0] 100048 I [irq42: virtio_pci0] 100051 I [irq43: virtio_pci1] 100052 I [irq44: virtio_pci1] 100053 I [irq1: atkbd0] 100054 I [irq12: psm0] 100055 I [swi0: uart uart++] 100094 I [swi1: pf send] 11 0 0 0 RL (threaded) [idle] 100003 CanRun [idle: cpu0] 100004 CanRun [idle: cpu1] 1 0 1 0 SLs wait 0xfffffe0008007040 [init] 10 0 0 0 DL audit_w 0xffffffff83ab9ea0 [audit] 0 0 0 0 DLs (threaded) [kernel] 100000 D parked 0xffffffff843e0ff0 [swapper] 100005 D - 0xfffffe005461c000 [softirq_0] 100006 D - 0xfffffe005461be00 [softirq_1] 100007 D - 0xfffffe005461bd00 [if_io_tqg_0] 100008 D - 0xfffffe005461bc00 [if_io_tqg_1] 100009 D - 0xfffffe005461bb00 [if_config_tqg_0] 100010 D - 0xfffffe0007fc9500 [kqueue_ctx taskq] 100011 D - 0xfffffe0007fc9300 [jail_remove taskq] 100012 D - 0xfffffe0007fc9100 [bus taskq] 100015 D - 0xfffffe0007fc8a00 [thread taskq] 100017 D - 0xfffffe0007fc8600 [aiod_kick taskq] 100018 D - 0xfffffe0007fc8400 [deferred_unmount ta] 100019 D - 0xfffffe0007fc8200 [inm_free taskq] 100020 D - 0xfffffe0007fc8000 [in6m_free taskq] 100021 D - 0xfffffe0007fc7d00 [linuxkpi_irq_wq] 100022 D - 0xfffffe0007fc7b00 [linuxkpi_short_wq_0] 100023 D - 0xfffffe0007fc7b00 [linuxkpi_short_wq_1] 100024 D - 0xfffffe0007fc7b00 [linuxkpi_short_wq_2] 100025 D - 0xfffffe0007fc7b00 [linuxkpi_short_wq_3] 100026 D - 0xfffffe0007fc7600 [linuxkpi_long_wq_0] 100027 D - 0xfffffe0007fc7600 [linuxkpi_long_wq_1] 100028 D - 0xfffffe0007fc7600 [linuxkpi_long_wq_2] 100029 D - 0xfffffe0007fc7600 [linuxkpi_long_wq_3] 100034 D - 0xfffffe0007fc6c00 [firmware taskq] 100039 D - 0xfffffe0007fc6600 [crypto_0] 100040 D - 0xfffffe0007fc6600 [crypto_1] 100049 D - 0xfffffe00581ec500 [vtnet0 rxq 0] 100050 D - 0xfffffe00581ec400 [vtnet0 txq 0] 100056 D - 0xffffffff8272d340 [deadlkres] 100057 D - 0xfffffe00581ea800 [acpi_task_0] 100058 D - 0xfffffe00581ea800 [acpi_task_1] 100059 D - 0xfffffe00581ea800 [acpi_task_2] 100061 D - 0xfffffe0007fc6000 [CAM taskq] 100092 D - 0xfffffe0058113800 [ipsec_offload] db> show all locks Process 1260 (syz-executor1361750) thread 0xfffffe00548e3000 (100126) exclusive sleep mutex umtxql (umtxql) r = 0 (0xffffffff8398e700) locked @ /home/markj/sb/main/src/sys/kern/kern_umtx.c:1311 Process 1260 (syz-executor1361750) thread 0xfffffe005491a000 (100716) exclusive sleep mutex so_rcv (so_rcv) r = 0 (0xfffffe006d5d91e0) locked @ /home/markj/sb/main/src/sys/kern/uipc_usrreq.c:1166 exclusive sx so_snd_sx (so_snd_sx) r = 0 (0xfffffe006d5d8d80) locked @ /home/markj/sb/main/src/sys/kern/uipc_socket.c:4836 db> show malloc Type InUse MemUse Requests pf_hash 6 12804K 6 linker 427 6537K 538 sysctloid 32120 1890K 32164 kobj 328 1312K 548 devbuf 1333 1144K 1365 vfscache 3 1025K 3 newblk 1 1024K 1947 pcb 17 525K 44 ufs_quota 1 512K 1 inodedep 1 512K 62 vfs_hash 1 512K 1 callout 2 512K 2 intr 4 472K 4 vnet_data 2 224K 2 acpitask 1 224K 1 KTRACE 100 200K 100 subproc 88 149K 1317 bus-sc 31 148K 1014 tidhash 3 141K 3 SWAP 1 132K 1 pagedep 1 128K 22 tfo_ccache 1 128K 1 IP reass 1 128K 1 sem 4 106K 4 gtaskqueue 18 98K 18 DEVFS1 97 97K 106 vmem 5 79K 5 bus 969 78K 3389 mtx_pool 3 74K 3 syncache 1 68K 1 NFSD srvcache 3 68K 3 ddb_capture 1 64K 1 module 511 64K 511 acpica 420 39K 59430 temp 19 37K 1768 LRO 2 33K 2 hostcache 1 32K 1 shm 1 32K 1 msg 4 30K 4 umtx 240 30K 240 DEVFS3 120 30K 127 kdtrace 137 29K 1978 kbdmux 5 28K 5 DEVFS_RULE 61 22K 61 BPF 10 18K 10 ithread 95 18K 95 GEOM 106 17K 690 ufs_mount 4 17K 5 proc 3 17K 3 eventhandler 152 13K 152 devstat 6 13K 6 rman 99 12K 529 kenv 92 12K 92 ifaddr 29 11K 29 routetbl 42 10K 125 rpc 8 9K 8 UART 12 9K 12 netgraph_btsocks_hci_raw 1 8K 1 bmsafemap 1 8K 60 shmfd 1 8K 1 pfs_vncache 1 8K 1 audit_evclass 239 8K 301 taskqueue 62 7K 143 pfs_nodes 22 6K 22 ufs_dirhash 27 6K 27 sglist 3 6K 3 kqueue 35 5K 1264 UMA 257 5K 257 ifnet 3 5K 3 io_apic 1 4K 1 tty 4 4K 4 evdev 4 4K 4 cred 15 4K 370 plimit 9 4K 303 pf_ifnet 5 3K 6 lltable 10 3K 10 acpidev 22 3K 22 acpisem 21 3K 21 toponodes 10 3K 10 hhook 8 3K 10 clone 9 3K 9 uidinfo 3 3K 9 local_apic 1 2K 1 ipsec-saq 2 2K 2 pwddesc 32 2K 1261 CAM DEV 1 2K 2 selfd 27 2K 16511 msi 13 2K 13 in6_multi 15 2K 15 Unitno 25 2K 39 lockf 15 2K 18 proc-args 45 2K 2293 pci_link 16 2K 16 session 12 2K 31 mount 31 2K 105 ipsecpolicy 2 2K 2 ether_multi 17 2K 17 netgraph_node 6 2K 6 select 10 2K 72 netlink 2 2K 112 CAM queue 2 2K 5 softdep 1 1K 1 sahead 1 1K 1 secasvar 1 1K 1 vnodemarker 2 1K 16 NFSD session 1 1K 1 ipsec 3 1K 3 nhops 6 1K 6 pfil 6 1K 6 crypto 4 1K 4 encap_export_host 12 1K 12 dumper 2 1K 2 CAM XPT 11 1K 12 in_multi 2 1K 2 cdev 2 1K 2 lkpikmalloc 8 1K 9 osd 8 1K 43 ip6ndp 3 1K 3 CC Mem 3 1K 7 chacha20random 1 1K 1 biobuf 1 1K 1 procdesc 3 1K 25 CAM periph 2 1K 14 prison 10 1K 10 DEVFS 10 1K 11 MCA 2 1K 2 mld 2 1K 2 igmp 2 1K 2 vnodes 1 1K 1 isadev 2 1K 3 NFSD lckfile 1 1K 1 NFSD V4client 1 1K 1 feeder 7 1K 7 inpcbpolicy 6 1K 94 loginclass 3 1K 7 apmdev 1 1K 1 atkbddev 2 1K 2 vm_pgdata 1 1K 1 pmchooks 1 1K 1 DEVFSP 2 1K 2 CAM SIM 1 1K 1 soname 4 1K 1001 nexusdev 6 1K 6 tcpfunc 1 1K 1 vnet 1 1K 1 pmc 1 1K 1 acpiintr 1 1K 1 CAM dev queue 1 1K 1 cpus 2 1K 2 vnet_data_free 1 1K 1 Per-cpu 1 1K 1 cache 1 1K 1 entropy 1 1K 86 CAM path 1 1K 12 fdesc_mount 1 1K 1 freework 1 1K 6 p1003.1b 1 1K 1 filecaps 1 1K 154 pf_table 0 0K 0 pf_rule 0 0K 0 pf_altq 0 0K 0 pf_osfp 0 0K 0 pf_krule_item 0 0K 0 pf_temp 0 0K 0 netgraph_l2cap 0 0K 0 netgraph_hci 0 0K 0 netgraph_btsocks_sco 0 0K 0 netgraph_btsocks_rfcomm 0 0K 0 netgraph_btsocks_l2cap 0 0K 0 netgraph_btsocks_l2cap_raw 0 0K 0 netgraph_parse 0 0K 0 netgraph_item 0 0K 0 netgraph_hook 0 0K 0 netgraph_msg 0 0K 0 netgraph 0 0K 0 ipcomp 0 0K 0 esp 0 0K 0 ah 0 0K 0 filemon 0 0K 0 cryptodev 0 0K 0 p9fs_mount_tag 0 0K 0 uio 0 0K 0 p9fs_mount 0 0K 0 p9_client 0 0K 0 madt_table 0 0K 2 smartpqi 0 0K 0 ixl 0 0K 0 ice-resmgr 0 0K 0 ice-osdep 0 0K 0 ice 0 0K 0 iavf 0 0K 0 axgbe 0 0K 0 memdesc 0 0K 0 fpukern_ctx 0 0K 0 xen_intr 0 0K 0 xen_hvm 0 0K 0 legacydrv 0 0K 0 NMI handlers 0 0K 0 bounce 0 0K 0 busdma 0 0K 0 qpidrv 0 0K 0 dmar_idpgtbl 0 0K 0 dmar_dom 0 0K 0 dmar_ctx 0 0K 0 amdiommu_dom 0 0K 0 amdiommu_ctx 0 0K 0 isci 0 0K 0 iommu_dmamap 0 0K 0 hyperv_socket 0 0K 0 bxe_ilt 0 0K 0 aesni_data 0 0K 0 xenbus 0 0K 0 vm_fictitious 0 0K 0 UMAHash 0 0K 0 jblocks 0 0K 0 savedino 0 0K 6 sentinel 0 0K 0 jfsync 0 0K 0 jtrunc 0 0K 0 sbdep 0 0K 5 jsegdep 0 0K 0 jseg 0 0K 0 jfreefrag 0 0K 0 jfreeblk 0 0K 0 jnewblk 0 0K 0 jmvref 0 0K 0 jremref 0 0K 0 jaddref 0 0K 0 freedep 0 0K 0 newdirblk 0 0K 6 dirrem 0 0K 20 mkdir 0 0K 12 diradd 0 0K 69 freefile 0 0K 5 freeblks 0 0K 5 freefrag 0 0K 0 allocindir 0 0K 0 indirdep 0 0K 3 allocdirect 0 0K 0 ufs_trim 0 0K 0 mactemp 0 0K 0 audit_trigger 0 0K 0 audit_pipe_presel 0 0K 0 audit_pipeent 0 0K 0 audit_pipe 0 0K 0 audit_evname 0 0K 0 audit_bsm 0 0K 0 audit_gidset 0 0K 0 audit_text 0 0K 0 audit_path 0 0K 0 audit_data 0 0K 0 audit_cred 0 0K 0 ktls_ocf 0 0K 0 MLX5EEPROM 0 0K 0 MLX5EEPROM 0 0K 0 MLX5EEPROM 0 0K 0 MLX5EEPROM 0 0K 0 MLX5EEPROM 0 0K 0 MLX5E_TLS_RX 0 0K 0 MLX5EEPROM 0 0K 0 MLX5E_TLS 0 0K 0 MLX5EEPROM 0 0K 0 MLX5EEPROM 0 0K 0 MLX5EEPROM 0 0K 0 MLX5EN 0 0K 0 MLX5EEPROM 0 0K 0 MLX5EEPROM 0 0K 0 MLX5EEPROM 0 0K 0 MLX5EEPROM 0 0K 0 MLX5EEPROM 0 0K 0 MLX5EEPROM 0 0K 0 MLX5EEPROM 0 0K 0 MLX5DUMP 0 0K 0 MLX5EEPROM 0 0K 0 MLX5EEPROM 0 0K 0 MLX5EEPROM 0 0K 0 MLX5EEPROM 0 0K 0 simple_attr 0 0K 0 seq_file 0 0K 0 lkpiskb 0 0K 0 radix 0 0K 0 idr 0 0K 0 lkpindev 0 0K 0 lkpimhi 0 0K 0 lkpifw 0 0K 0 lkpi80211 0 0K 0 NLM 0 0K 0 ipsec-spdcache 0 0K 0 ipsec-reg 0 0K 0 ipsec-misc 0 0K 0 ipsecrequest 0 0K 0 ip6opt 0 0K 0 ip6_msource 0 0K 0 ip6_moptions 0 0K 0 in6_mfilter 0 0K 0 frag6 0 0K 0 tcplog 0 0K 0 ip_msource 0 0K 0 ip_moptions 0 0K 0 in_mfilter 0 0K 0 ipid 0 0K 0 80211scan 0 0K 0 80211ratectl 0 0K 0 80211power 0 0K 0 80211nodeie 0 0K 0 80211node 0 0K 0 80211mesh_gt 0 0K 0 80211mesh_rt 0 0K 0 80211perr 0 0K 0 80211prep 0 0K 0 80211preq 0 0K 0 80211dfs 0 0K 0 80211crypto 0 0K 0 80211vap 0 0K 0 iflib 0 0K 0 vlan 0 0K 0 tun 0 0K 0 gif 0 0K 0 ifdescr 0 0K 0 zlib 0 0K 13 fadvise 0 0K 0 VN POLL 0 0K 0 statfs 0 0K 18 namei_tracker 0 0K 0 export_host 0 0K 0 cl_savebuf 0 0K 3 aio 0 0K 0 lio 0 0K 0 acl 0 0K 0 mbuf_tag 0 0K 0 ktls 0 0K 0 accf 0 0K 0 pts 0 0K 0 timerfd 0 0K 0 iov 0 0K 6398 ioctlops 0 0K 70 eventfd 0 0K 0 Witness 0 0K 0 terminal 0 0K 0 stack 0 0K 0 sbuf 0 0K 473 firmware 0 0K 0 compressor 0 0K 0 sysctltmp 0 0K 542 sysctl 0 0K 37 ekcd 0 0K 0 sendfile 0 0K 0 rctl 0 0K 0 kcovinfo 0 0K 0 prison_racct 0 0K 0 Fail Points 0 0K 0 sigio 0 0K 1 filedesc_to_leader 0 0K 0 pwd 0 0K 0 filedesc 0 0K 0 tty console 0 0K 0 boottrace 0 0K 0 isofs_node 0 0K 0 isofs_mount 0 0K 0 tr_raid5_data 0 0K 0 tr_raid1e_data 0 0K 0 tr_raid1_data 0 0K 0 tr_raid0_data 0 0K 0 tr_concat_data 0 0K 0 md_sii_data 0 0K 0 md_promise_data 0 0K 0 md_nvidia_data 0 0K 0 md_jmicron_data 0 0K 0 md_intel_data 0 0K 0 md_ddf_data 0 0K 0 raid_data 0 0K 108 geom_flashmap 0 0K 0 tmpfs dir 0 0K 0 tmpfs name 0 0K 0 tmpfs mount 0 0K 0 tmpfs extattr 0 0K 0 NFS FHA 0 0K 0 newnfsmnt 0 0K 0 newnfsclient_req 0 0K 0 NFSCL layrecall 0 0K 0 NFSCL session 0 0K 0 NFSCL sockreq 0 0K 0 NFSCL devinfo 0 0K 0 NFSCL flayout 0 0K 0 NFSCL layout 0 0K 0 NFSD rollback 0 0K 0 NFSCL diroff 0 0K 0 NEWNFSnode 0 0K 0 NFSCL lck 0 0K 0 NFSCL lckown 0 0K 0 NFSCL client 0 0K 0 NFSCL deleg 0 0K 0 NFSCL open 0 0K 0 NFSCL owner 0 0K 0 NFS fh 0 0K 0 NFS req 0 0K 0 NFSD usrgroup 0 0K 0 NFSD string 0 0K 0 NFSD V4lock 0 0K 0 NFSD V4state 0 0K 0 msdosfs_fat 0 0K 0 msdosfs_mount 0 0K 0 msdosfs_node 0 0K 0 DEVFS4 0 0K 0 DEVFS2 0 0K 0 gntdev 0 0K 0 privcmd_dev 0 0K 0 evtchn_dev 0 0K 0 xenstore 0 0K 0 xnb 0 0K 0 xen_acpi 0 0K 0 xbbd 0 0K 0 xbd 0 0K 0 Balloon 0 0K 0 sysmouse 0 0K 0 vtfont 0 0K 0 vt 0 0K 0 vtbuf 0 0K 0 pvscsi 0 0K 0 USBdev 0 0K 0 USB 0 0K 0 twsbuf 0 0K 0 tcp_log_dev 0 0K 0 midi buffers 0 0K 0 mixer 0 0K 0 ac97 0 0K 0 hdacc 0 0K 0 hdac 0 0K 0 hdaa 0 0K 0 SIIS driver 0 0K 0 PUC 0 0K 0 ppbusdev 0 0K 0 sr_iov 0 0K 0 OCS 0 0K 0 OCS 0 0K 0 nvme 0 0K 0 nvd 0 0K 0 netmap 0 0K 0 mwldev 0 0K 0 MVS driver 0 0K 0 mrsasbuf 0 0K 0 mpt_user 0 0K 0 mps_user 0 0K 0 MPSSAS 0 0K 0 mps 0 0K 0 mpr_user 0 0K 0 MPRSAS 0 0K 0 mpr 0 0K 0 mfibuf 0 0K 0 md_sectors 0 0K 0 md_disk 0 0K 0 malodev 0 0K 0 LED 0 0K 0 ix_sriov 0 0K 0 ix 0 0K 0 ipsbuf 0 0K 0 ciss_data 0 0K 0 BACKLIGHT 0 0K 0 ath_hal 0 0K 0 athdev 0 0K 0 ata_pci 0 0K 0 ata_dma 0 0K 0 ata_generic 0 0K 0 AHCI driver 0 0K 0 agp 0 0K 0 acpipwr 0 0K 0 acpi_perf 0 0K 0 acpicmbat 0 0K 0 aacraidcam 0 0K 0 aacraid_buf 0 0K 0 aaccam 0 0K 0 aacbuf 0 0K 0 zstd 0 0K 0 XZ_DEC 0 0K 0 nvlist 0 0K 0 SCSI ENC 0 0K 0 SCSI sa 0 0K 0 scsi_pass 0 0K 0 scsi_da 0 0K 0 ata_da 0 0K 0 scsi_ch 0 0K 0 scsi_cd 0 0K 0 nvme_da 0 0K 0 CAM CCB 0 0K 0 CAM ccb queue 0 0K 0 CAM I/O Scheduler 0 0K 0 db> show uma Zone Size Used Free Requests Sleeps Bucket Total Mem XFree mbuf_jumbo_page 4096 1088 944 44487 0 254 8323072 0 BUF TRIE 152 277 11579 1081 0 62 1802112 0 malloc-4096 4096 360 8 1809 0 2 1507328 0 malloc-128 128 11330 140 11400 0 126 1468160 0 malloc-65536 65536 15 1 27 0 1 1048576 0 mbuf_cluster 2048 508 0 508 0 254 1040384 0 mbuf 256 1351 1201 69230 0 254 653312 0 pbuf 2624 0 228 0 0 2 598272 0 RADIX NODE 152 3351 440 68967 0 62 576232 0 malloc-512 512 1038 42 1057 0 30 552960 0 socket 1024 22 486 1744 0 254 520192 0 lkpicurr 168 2 3094 2 0 62 520128 0 malloc-256 256 12 1983 2510 0 62 510720 0 malloc-32768 32768 11 2 20 0 1 425984 0 UMA Slabs 0 112 3533 25 3533 0 126 398496 0 vmem btag 56 6941 82 6941 0 254 393288 0 malloc-2048 2048 147 5 165 0 8 311296 0 FPU_save_area 2432 106 14 727 0 4 291840 0 VM OBJECT 264 853 137 18045 0 30 261360 0 VNODE 440 525 51 532 0 30 253440 0 malloc-64 64 3545 298 20116 0 254 245952 0 256 Bucket 2048 100 20 798 0 8 245760 0 malloc-16384 16384 13 1 18 0 1 229376 0 malloc-2048 2048 103 9 336 0 8 229376 0 malloc-16 16 13527 223 13617 0 254 220000 0 THREAD 1824 104 16 716 0 8 218880 0 DEVCTL 1024 0 196 94 0 0 200704 0 UMA Zones 768 229 0 229 0 16 175872 0 lkpimm 56 1 3095 1 0 254 173376 0 unpcb 320 15 501 1622 0 254 165120 0 malloc-32 32 4599 315 4732 0 254 157248 0 FFS2 dinode 256 500 70 505 0 62 145920 0 MAP ENTRY 96 819 567 57392 0 126 133056 0 malloc-65536 65536 0 2 2 0 1 131072 0 malloc-65536 65536 2 0 2 0 1 131072 0 malloc-32768 32768 4 0 52 0 1 131072 0 malloc-1024 1024 109 19 239 0 16 131072 0 mbuf_packet 256 1 507 62 0 254 130048 0 malloc-8192 8192 15 0 18 0 1 122880 0 S VFS Cache 104 950 220 990 0 126 121680 0 ksiginfo 112 35 1009 67 0 126 116928 0 FFS inode 200 500 60 505 0 62 112000 0 malloc-4096 4096 20 2 174 0 2 90112 0 UMA Kegs 384 214 9 214 0 30 85632 0 128 Bucket 1024 41 42 251 0 16 84992 0 malloc-64 64 979 344 4083 0 254 84672 0 PROC 1376 31 24 1260 0 8 75680 0 64 Bucket 512 96 40 1988 0 30 69632 0 malloc-128 128 413 114 2222 0 126 67456 0 DIRHASH 1024 40 24 40 0 16 65536 0 malloc-65536 65536 0 1 44 0 1 65536 0 malloc-65536 65536 1 0 1 0 1 65536 0 malloc-32768 32768 2 0 2 0 1 65536 0 ttyoutq 256 93 162 279 0 62 65280 0 malloc-256 256 138 117 397 0 62 65280 0 malloc-256 256 127 128 813 0 62 65280 0 filedesc0 1072 32 24 1261 0 8 60032 0 ttyinq 160 180 145 540 0 62 52000 0 malloc-128 128 269 134 27180 0 126 51584 0 malloc-256 256 151 44 610 0 62 49920 0 32 Bucket 256 55 140 2548 0 62 49920 0 NAMEI 1024 0 48 12106 0 16 49152 0 malloc-16384 16384 0 3 6 0 1 49152 0 g_bio 384 0 120 5735 0 30 46080 0 syncache 168 0 264 5 0 254 44352 0 udp_inpcb 408 2 88 86 0 30 36720 0 malloc-64 64 17 550 6334 0 254 36288 0 malloc-64 64 49 518 54 0 254 36288 0 malloc-64 64 176 391 1569 0 254 36288 0 malloc-64 64 45 522 1274 0 254 36288 0 malloc-64 64 5 562 9 0 254 36288 0 malloc-128 128 13 266 21 0 126 35712 0 malloc-128 128 118 161 573 0 126 35712 0 malloc-128 128 5 274 16 0 126 35712 0 routing nhops 256 7 128 12 0 62 34560 0 malloc-384 384 0 90 65 0 30 34560 0 malloc-384 384 40 50 45 0 30 34560 0 malloc-384 384 63 27 250 0 30 34560 0 malloc-384 384 58 32 58 0 30 34560 0 malloc-256 256 48 87 232 0 62 34560 0 malloc-256 256 32 103 97 0 62 34560 0 malloc-256 256 6 129 6 0 62 34560 0 malloc-32768 32768 0 1 1 0 1 32768 0 malloc-32768 32768 1 0 1 0 1 32768 0 malloc-32768 32768 1 0 1 0 1 32768 0 malloc-4096 4096 7 1 7 0 2 32768 0 malloc-2048 2048 1 15 19 0 8 32768 0 malloc-2048 2048 5 11 6 0 8 32768 0 malloc-2048 2048 2 14 39 0 8 32768 0 malloc-1024 1024 3 29 69 0 16 32768 0 malloc-1024 1024 4 28 4 0 16 32768 0 malloc-1024 1024 19 13 1007 0 16 32768 0 malloc-1024 1024 5 27 17 0 16 32768 0 malloc-1024 1024 5 27 6 0 16 32768 0 malloc-512 512 1 63 157 0 30 32768 0 malloc-512 512 5 59 47 0 30 32768 0 malloc-512 512 9 55 9 0 30 32768 0 pcpu-64 64 486 26 486 0 254 32768 0 pcpu-8 8 3726 370 3744 0 254 32768 0 PGRP 120 12 252 31 0 126 31680 0 clpbuf 2624 0 12 81 0 4 31488 0 VMSPACE 584 15 34 1246 0 16 28616 0 malloc-32 32 282 600 459 0 254 28224 0 4 Bucket 48 9 579 82 0 254 28224 0 TURNSTILE 136 121 68 121 0 62 25704 0 cpuset 200 7 121 7 0 62 25600 0 malloc-8192 8192 2 1 36 0 1 24576 0 malloc-8192 8192 3 0 36 0 1 24576 0 malloc-4096 4096 5 1 5 0 2 24576 0 malloc-4096 4096 0 6 29 0 2 24576 0 pipe 736 5 28 429 0 16 24288 0 ertt_txseginfo 40 0 606 906 0 254 24240 0 PWD 40 9 597 66 0 254 24240 0 rtentry 168 10 134 12 0 62 24192 0 Files 80 70 230 8185 0 126 24000 0 8 Bucket 80 34 266 231 0 126 24000 0 tcp_inpcb 1304 3 15 7 0 8 23472 0 malloc-384 384 6 54 6 0 30 23040 0 malloc-384 384 10 50 304 0 30 23040 0 SLEEPQUEUE 88 121 135 121 0 126 22528 0 hostcache 64 1 314 1 0 254 20160 0 ertt 72 3 277 7 0 126 20160 0 malloc-32 32 66 564 80 0 254 20160 0 malloc-32 32 159 471 1212 0 254 20160 0 malloc-32 32 37 593 4855 0 254 20160 0 malloc-32 32 9 621 11 0 254 20160 0 16 Bucket 144 38 102 263 0 62 20160 0 2 Bucket 32 53 577 338 0 254 20160 0 malloc-16 16 462 788 3791 0 254 20000 0 malloc-128 128 38 117 155 0 126 19840 0 malloc-128 128 0 155 12 0 126 19840 0 malloc-256 256 8 67 8 0 62 19200 0 vmem 1856 2 7 2 0 8 16704 0 epoch_record pcpu 256 4 60 4 0 62 16384 0 malloc-16384 16384 1 0 73 0 1 16384 0 malloc-16384 16384 1 0 1 0 1 16384 0 malloc-8192 8192 2 0 2 0 1 16384 0 malloc-8192 8192 2 0 2 0 1 16384 0 malloc-4096 4096 0 4 11 0 2 16384 0 malloc-4096 4096 0 4 18 0 2 16384 0 malloc-4096 4096 2 2 48 0 2 16384 0 malloc-2048 2048 1 7 1 0 8 16384 0 malloc-2048 2048 1 7 1 0 8 16384 0 malloc-1024 1024 9 7 9 0 16 16384 0 malloc-512 512 2 30 2 0 30 16384 0 SMR CPU 32 8 503 8 0 254 16352 0 kenv 258 2 58 698 0 30 15480 0 SMR SHARED 24 8 503 8 0 254 12264 0 malloc-32 32 22 356 97 0 254 12096 0 KNOTE 160 10 65 10 0 62 12000 0 malloc-16 16 19 731 229 0 254 12000 0 malloc-16 16 53 697 26004 0 254 12000 0 malloc-16 16 25 725 54 0 254 12000 0 malloc-16 16 7 743 8 0 254 12000 0 L VFS Cache 320 0 36 1 0 30 11520 0 malloc-384 384 1 29 1 0 30 11520 0 ripcb 376 1 29 1 0 30 11280 0 Mountpoints 2816 3 1 3 0 4 11264 0 malloc-8192 8192 0 1 13 0 1 8192 0 malloc-8192 8192 1 0 1 0 1 8192 0 vtnet_tx_hdr 24 1 333 22235 0 254 8016 0 malloc-16 16 8 492 8 0 254 8000 0 malloc-16 16 4 496 4 0 254 8000 0 pcpu-16 16 4 252 4 0 254 4096 0 UMA Slabs 1 176 7 15 7 0 62 3872 0 KMAP ENTRY 96 35 4 51 0 0 3744 0 pf state scrubs 40 0 0 0 0 254 0 0 pf frag entries 40 0 0 0 0 254 0 0 pf frags 256 0 0 0 0 62 0 0 pf table entries 160 0 0 0 0 254 0 0 pf table entry counters 64 0 0 0 0 254 0 0 pf UDP mappings 104 0 0 0 0 126 0 0 pf source nodes 152 0 0 0 0 254 0 0 pf state keys 88 0 0 0 0 126 0 0 pf states 376 0 0 0 0 254 0 0 pf tags 104 0 0 0 0 126 0 0 pf mtags 184 0 0 0 0 62 0 0 NetGraph data items 72 0 0 0 0 254 0 0 NetGraph items 72 0 0 0 0 254 0 0 swblk 136 0 0 0 0 62 0 0 swpctrie 152 0 0 0 0 62 0 0 FFS1 dinode 128 0 0 0 0 126 0 0 da_ccb 544 0 0 0 0 16 0 0 ada_ccb 272 0 0 0 0 30 0 0 tfo_ccache_entries 80 0 0 0 0 126 0 0 tfo 4 0 0 0 0 254 0 0 sackhole 32 0 0 0 0 254 0 0 ipq 56 0 0 0 0 254 0 0 tcp_log_id_node 120 0 0 0 0 126 0 0 tcp_log_id_bucket 176 0 0 0 0 62 0 0 tcp_log 416 0 0 0 0 254 0 0 tcpreass 48 0 0 0 0 254 0 0 udplite_inpcb 408 0 0 0 0 30 0 0 IPsec SA lft_c 16 0 0 0 0 254 0 0 itimer 352 0 0 0 0 30 0 0 AIOLIO 272 0 0 0 0 30 0 0 AIOCB 552 0 0 0 0 16 0 0 AIO 208 0 0 0 0 62 0 0 p9fs io_buffer zone 8192 0 0 0 0 1 0 0 p9fs setattr zone 56 0 0 0 0 254 0 0 p9fs getattr zone 160 0 0 0 0 62 0 0 p9fs node zone 312 0 0 0 0 30 0 0 TMPFS node 240 0 0 0 0 62 0 0 NCLNODE 608 0 0 0 0 16 0 0 LTS VFS Cache 360 0 0 0 0 30 0 0 STS VFS Cache 144 0 0 0 0 62 0 0 p9fs buf zone 8224 0 0 0 0 1 0 0 p9fs req zone 16 0 0 0 0 254 0 0 p9fs fid zone 56 0 0 0 0 254 0 0 cryptop 280 0 0 0 0 30 0 0 linux_dma_object 32 0 0 0 0 254 0 0 linux_dma_pctrie 152 0 0 0 0 62 0 0 IOMMU_MAP_ENTRY 112 0 0 0 0 126 0 0 mbuf_jumbo_16k 16384 0 0 0 0 254 0 0 mbuf_jumbo_9k 9216 0 0 0 0 254 0 0 audit_record 1280 0 0 0 0 8 0 0 domainset 40 0 0 0 0 254 0 0 MAC labels 40 0 0 0 0 254 0 0 vnpbuf 2624 0 0 0 0 16 0 0 nfspbuf 2624 0 0 0 0 4 0 0 p9fs pbuf zone 2624 0 0 0 0 4 0 0 swwbuf 2624 0 0 0 0 2 0 0 swrbuf 2624 0 0 0 0 4 0 0 umtx_shm 88 0 0 0 0 126 0 0 umtx pi 96 0 0 0 0 126 0 0 rangeset pctrie nodes 152 0 0 0 0 62 0 0 rl_entry 48 0 0 0 0 254 0 0 malloc-65536 65536 0 0 0 0 1 0 0 malloc-65536 65536 0 0 0 0 1 0 0 malloc-65536 65536 0 0 0 0 1 0 0 malloc-32768 32768 0 0 0 0 1 0 0 malloc-32768 32768 0 0 0 0 1 0 0 malloc-16384 16384 0 0 0 0 1 0 0 malloc-16384 16384 0 0 0 0 1 0 0 malloc-16384 16384 0 0 0 0 1 0 0 malloc-16384 16384 0 0 0 0 1 0 0 malloc-8192 8192 0 0 0 0 1 0 0 malloc-2048 2048 0 0 0 0 8 0 0 malloc-1024 1024 0 0 0 0 16 0 0 malloc-512 512 0 0 0 0 30 0 0 malloc-512 512 0 0 0 0 30 0 0 malloc-512 512 0 0 0 0 30 0 0 malloc-384 384 0 0 0 0 30 0 0 malloc-64 64 0 0 0 0 254 0 0 malloc-32 32 0 0 0 0 254 0 0 pcpu-32 32 0 0 0 0 254 0 0 pcpu-4 4 0 0 0 0 254 0 0 fakepg 104 0 0 0 0 126 0 0 UMA Hash 256 0 0 0 0 62 0 0 Syzkaller reproducer: # {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}} mlock(&(0x7f0000bff000/0x400000)=nil, 0x400000) (async) socketpair$unix(0x1, 0x1, 0x0, &(0x7f0000000440)={0xffffffffffffffff, 0xffffffffffffffff}) setsockopt$sock_int(r1, 0xffff, 0x1002, &(0x7f0000000480)=0x4, 0x4) (async) sendto$unix(r0, &(0x7f00000006c0)="0b47c7e8f2", 0x5, 0x0, 0x0, 0x0) (rerun: 32) C reproducer: // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static __thread int clone_ongoing; static __thread int skip_segv; static __thread jmp_buf segv_env; static void segv_handler(int sig, siginfo_t* info, void* ctx) { if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) { exit(sig); } uintptr_t addr = (uintptr_t)info->si_addr; const uintptr_t prog_start = 1 << 20; const uintptr_t prog_end = 100 << 20; int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0; int valid = addr < prog_start || addr > prog_end; if (sig == SIGBUS) valid = 1; if (skip && valid) { _longjmp(segv_env, 1); } exit(sig); } static void install_segv_handler(void) { struct sigaction sa; memset(&sa, 0, sizeof(sa)); sa.sa_sigaction = segv_handler; sa.sa_flags = SA_NODEFER | SA_SIGINFO; sigaction(SIGSEGV, &sa, NULL); sigaction(SIGBUS, &sa, NULL); } #define NONFAILING(...) \ ({ \ int ok = 1; \ __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST); \ if (_setjmp(segv_env) == 0) { \ __VA_ARGS__; \ } else \ ok = 0; \ __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST); \ ok; \ }) static void kill_and_wait(int pid, int* status) { kill(pid, SIGKILL); while (waitpid(-1, status, 0) != pid) { } } static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { pthread_mutex_t mu; pthread_cond_t cv; int state; } event_t; static void event_init(event_t* ev) { if (pthread_mutex_init(&ev->mu, 0)) exit(1); if (pthread_cond_init(&ev->cv, 0)) exit(1); ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { pthread_mutex_lock(&ev->mu); if (ev->state) exit(1); ev->state = 1; pthread_mutex_unlock(&ev->mu); pthread_cond_broadcast(&ev->cv); } static void event_wait(event_t* ev) { pthread_mutex_lock(&ev->mu); while (!ev->state) pthread_cond_wait(&ev->cv, &ev->mu); pthread_mutex_unlock(&ev->mu); } static int event_isset(event_t* ev) { pthread_mutex_lock(&ev->mu); int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; pthread_mutex_lock(&ev->mu); for (;;) { if (ev->state) break; uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; pthread_cond_timedwait(&ev->cv, &ev->mu, &ts); now = current_time_ms(); if (now - start > timeout) break; } int res = ev->state; pthread_mutex_unlock(&ev->mu); return res; } struct thread_t { int created, call; event_t ready, done; }; static struct thread_t threads[16]; static void execute_call(int call); static int running; static void* thr(void* arg) { struct thread_t* th = (struct thread_t*)arg; for (;;) { event_wait(&th->ready); event_reset(&th->ready); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); event_set(&th->done); } return 0; } static void execute_one(void) { if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } int i, call, thread; for (call = 0; call < 4; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); if (call == 0 || call == 2) break; event_timedwait(&th->done, 50); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); } static void execute_one(void); #define WAIT_FLAGS 0 static void loop(void) { int iter = 0; for (;; iter++) { int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { execute_one(); exit(0); } int status = 0; uint64_t start = current_time_ms(); for (;;) { sleep_ms(10); if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; if (current_time_ms() - start < 5000) continue; kill_and_wait(pid, &status); break; } } } uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: syscall(SYS_mlock, /*addr=*/0x400000bff000ul, /*size=*/0x400000ul); break; case 1: res = syscall(SYS_socketpair, /*domain=*/1ul, /*type=SOCK_STREAM*/ 1ul, /*proto=*/0, /*fds=*/0x400000000440ul); if (res != -1) { NONFAILING(r[0] = *(uint32_t*)0x400000000440); NONFAILING(r[1] = *(uint32_t*)0x400000000444); } break; case 2: NONFAILING(*(uint32_t*)0x400000000480 = 4); syscall(SYS_setsockopt, /*fd=*/r[1], /*level=*/0xffff, /*optname=SO_RCVBUF*/ 0x1002, /*optval=*/0x400000000480ul, /*optlen=*/4ul); break; case 3: NONFAILING(memcpy((void*)0x4000000006c0, "\x0b\x47\xc7\xe8\xf2", 5)); syscall(SYS_sendto, /*fd=*/r[0], /*buf=*/0x4000000006c0ul, /*len=*/5ul, /*f=*/0ul, /*addr=*/0ul, /*addrlen=*/0ul); for (int i = 0; i < 32; i++) { syscall(SYS_sendto, /*fd=*/r[0], /*buf=*/0x4000000006c0ul, /*len=*/5ul, /*f=*/0ul, /*addr=*/0ul, /*addrlen=*/0ul); } break; } } int main(void) { syscall(SYS_mmap, /*addr=*/0x400000000000ul, /*len=*/0x1000000ul, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x1012ul, /*fd=*/-1, /*offset=*/0ul); const char* reason; (void)reason; install_segv_handler(); loop(); return 0; }