kernel: protection fault trap, code=0 Stopped at sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic the kernel did not panic ddb> trace sys_msgrcv(ffff80002a7f9248,ffff80003c999850,ffff80003c9997a0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7f9248,ffff80003c999850,ffff80003c9997a0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c999850) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c999850) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfbee3a63e70, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff80003c999780 rbx 0 rdx 0xffff800001464240 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0xbec4dfea6debf491 r11 0xea4d131103a907ac r12 0xfffffd8077d76d70 r13 0xdead4110dead4110 r14 0xffff800001496800 r15 0xa rip 0xffffffff82b79872 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80003c9996e0 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=42264 pid=59015 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=79, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7f9ca8,0xffff80002a823a18 process=0xffff80003c986940 user=0xffff80003c994000, vmspace=0xfffffd806ba2dd00 estcpu=29, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 48217 400437 68005 0 2 0 syz-executor 48217 182389 68005 0 3 0x4000080 fsleep syz-executor 63224 86095 2789 0 2 0 syz-executor 63224 278224 2789 0 3 0x4000080 fsleep syz-executor 99025 243131 15358 0 2 0 syz-executor 99025 342180 15358 0 3 0x4000080 fsleep syz-executor 99025 172019 15358 0 3 0x4000080 fsleep syz-executor 99025 99602 15358 0 3 0x4000080 fsleep syz-executor 7823 302627 46196 0 2 0 syz-executor 7823 56732 46196 0 3 0x4000080 fsleep syz-executor 7823 254438 46196 0 3 0x4000080 fsleep syz-executor 7823 46918 46196 0 3 0x4000080 fsleep syz-executor 90848 293551 43354 0 2 0 syz-executor 90848 503737 43354 0 3 0x4000080 fsleep syz-executor 61861 497258 12982 0 2 0 syz-executor 61861 488909 12982 0 3 0x4000080 fsleep syz-executor 59015 63648 9177 0 2 0 syz-executor *59015 42264 9177 0 7 0x4000000 syz-executor 59015 505220 9177 0 3 0x4000080 fsleep syz-executor 59015 498975 9177 0 2 0x4000000 syz-executor 83764 471717 19097 60929 2 0x10 syz-executor 83764 328875 19097 60929 3 0x4000090 fsleep syz-executor 83764 348710 19097 60929 3 0x4000090 fsleep syz-executor 164 41126 0 0 3 0x14200 acct acct 56307 497916 0 0 3 0x14200 bored sosplice 19097 155177 75934 0 3 0x82 nanoslp syz-executor 2789 300903 75934 0 3 0x82 nanoslp syz-executor 43354 239847 75934 0 3 0x82 nanoslp syz-executor 15358 355772 75934 0 3 0x82 nanoslp syz-executor 9177 232372 75934 0 3 0x82 nanoslp syz-executor 12982 477792 75934 0 3 0x82 nanoslp syz-executor 68005 438798 75934 0 3 0x82 nanoslp syz-executor 46196 296859 75934 0 3 0x82 nanoslp syz-executor 75934 240734 97005 0 3 0x82 kqread syz-executor 97005 488001 41795 0 3 0x10008a sigsusp ksh 41795 277165 22181 0 3 0x98 kqread sshd-session 22181 26404 35977 0 3 0x92 kqread sshd-session 91826 219131 1 0 3 0x100083 ttyin getty 35977 93794 1 0 3 0x88 kqread sshd 59186 8193 66400 73 3 0x1100090 kqread syslogd 66400 12555 1 0 3 0x100082 sbwait syslogd 90040 331566 1 0 3 0x100080 kqread resolvd 63242 181052 81640 77 3 0x100092 kqread dhcpleased 38526 489724 81640 77 3 0x100092 kqread dhcpleased 81640 205591 1 0 3 0x80 kqread dhcpleased 1577 486561 0 0 3 0x14200 bored smr 46059 35018 0 0 2 0x14200 zerothread 53632 173100 0 0 3 0x14200 aiodoned aiodoned 31236 293759 0 0 3 0x14200 syncer update 53352 452517 0 0 3 0x14200 cleaner cleaner 28573 132886 0 0 3 0x14200 reaper reaper 59478 60955 0 0 3 0x14200 pgdaemon pagedaemon 87115 296454 0 0 3 0x14200 bored viomb 67666 112508 0 0 3 0x40014200 acpi0 acpi0 5078 48792 0 0 3 0x14200 bored softnet7 97957 52343 0 0 3 0x14200 bored softnet6 32421 174767 0 0 3 0x14200 bored softnet5 32710 367696 0 0 3 0x14200 bored softnet4 91763 302658 0 0 3 0x14200 bored softnet3 14245 492230 0 0 3 0x14200 bored softnet2 16051 378425 0 0 3 0x14200 bored softnet1 35179 288760 0 0 3 0x14200 bored softnet0 78014 143374 0 0 3 0x14200 bored systqmp 90784 146000 0 0 3 0x14200 bored systq 99952 395320 0 0 3 0x40014200 tmoslp softclock 51282 480036 0 0 3 0x40014200 idle0 1 240339 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10218 11051K 12120K 166960K 12975 0 pcb 17 16K 17K 166960K 335 0 rtable 154 9K 9K 166960K 428 0 pf 33 13K 14K 166960K 122 0 ifaddr 34 5K 7K 166960K 94 0 ifgroup 54 2K 2K 166960K 150 0 sysctl 4 1K 9K 166960K 14 0 counters 33 17K 18K 166960K 86 0 ioctlops 0 0K 4K 166960K 483 0 iov 0 0K 16K 166960K 104 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1467 92K 93K 166960K 2226 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 15 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 36 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 106K 166960K 876 0 sigio 0 0K 0K 166960K 79 0 proc 60 59K 124K 166960K 539 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 78 0 in_multi 66 4K 7K 166960K 133 0 ether_multi 1 0K 0K 166960K 7 0 mrt 0 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 447 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 234 151K 174K 166960K 9486 0 UVM aobj 21 4K 4K 166960K 25 0 pinsyscall 39 78K 96K 166960K 1904 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 119 0 NDP 12 0K 1K 166960K 61 0 temp 59 8639K 8708K 166960K 37351 0 kqueue 13 20K 28K 166960K 173 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 140 0 137 3 2 1 3 0 8 0 rtentry 136 128 0 75 4 0 4 4 0 8 0 unpcb 144 662 0 644 5 3 2 4 0 8 1 syncache 336 5 0 5 1 1 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 328 0 322 10 6 4 7 0 8 3 arp 88 15 0 8 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 1 0 0 1 0 1 1 0 8 0 inpcb 328 972 0 962 13 6 7 7 0 8 6 ip6q 72 7 0 2 1 0 1 1 0 8 0 ip6af 40 9 0 4 1 0 1 1 0 8 0 nd6 104 24 0 12 1 0 1 1 0 8 0 pkpcb 40 9 0 9 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1072 42 0 42 2 1 1 1 0 8 1 pppxif 1384 6 0 6 2 1 1 1 0 8 1 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 617 0 326 28 2 26 28 0 8 2 art_table 40 619 0 326 5 0 5 5 0 8 0 art_node 32 128 0 82 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 12 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 32 0 22 1 0 1 1 0 8 0 shmpl 112 22 0 4 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2953 0 1461 95 0 95 95 0 8 0 ffsino 256 2953 0 1461 95 0 95 95 0 8 0 nchpl 144 4160 0 2482 63 0 63 63 0 8 0 rtmask 32 7 0 7 2 1 1 1 0 8 1 uvmvnodes 80 3623 0 0 74 0 74 74 0 8 0 vnodes 216 3623 0 0 202 0 202 202 0 8 0 namei 1024 14368 0 14368 3 2 1 2 0 8 1 kstatmem 264 90 0 66 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 18788 0 18788 9 7 2 8 1 8 2 plimitpl 152 191 0 175 1 0 1 1 0 8 0 sigapl 424 1151 0 1099 7 1 6 7 0 8 0 knotepl 120 64247 0 64200 23 13 10 16 0 8 8 kqueuepl 184 276 0 267 1 0 1 1 0 8 0 pipepl 304 335 0 308 8 5 3 8 0 8 0 fdescpl 448 1128 0 1098 5 1 4 5 0 8 0 filepl 120 7599 0 7389 19 9 10 18 0 8 1 lockfpl 104 504 0 502 2 1 1 2 0 8 0 lockfspl 48 195 0 193 1 0 1 1 0 8 0 sessionpl 144 23 0 15 1 0 1 1 0 8 0 pgrppl 48 45 0 29 1 0 1 1 0 8 0 ucredpl 104 1138 0 1125 1 0 1 1 0 8 0 zombiepl 144 1322 0 1322 1 0 1 1 0 8 1 processpl 1168 1151 0 1099 5 1 4 5 0 8 0 procpl 664 2334 0 2267 7 0 7 7 0 8 1 sosppl 168 7 0 6 2 1 1 1 0 8 0 sockpl 552 1814 0 1783 17 9 8 12 0 8 5 mcl64k 65536 104 0 104 2 1 1 1 0 8 1 mcl12k 12288 1 0 1 1 0 1 1 0 8 1 mcl9k 9216 2 0 2 1 1 0 1 0 8 0 mcl8k 8192 12 0 12 2 1 1 1 0 8 1 mcl4k 4096 3470 0 3416 15 7 8 15 0 8 0 mcl2k 2048 1281 0 1276 3 1 2 2 0 8 1 mtagpl 96 18 0 11 1 0 1 1 0 8 0 mbufpl 256 11986 0 11834 24 12 12 24 0 8 0 bufpl 280 7107 0 879 446 0 446 446 0 8 0 anonpl 24 190607 0 187359 51 16 35 51 0 187 2 amapchunkpl 152 31621 0 31114 44 10 34 34 0 158 14 amappl16 200 3739 0 3706 21 17 4 15 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 114 0 104 1 0 1 1 0 8 0 amappl13 176 11 0 11 1 1 0 1 0 8 0 amappl12 168 1792 0 1762 3 1 2 3 0 8 0 amappl11 160 50 0 39 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 246 0 246 1 1 0 1 0 8 0 amappl8 136 20 0 19 1 0 1 1 0 8 0 amappl7 128 104 0 93 1 0 1 1 0 8 0 amappl6 120 174 0 170 1 0 1 1 0 8 0 amappl5 112 141 0 133 1 0 1 1 0 8 0 amappl4 104 277 0 259 1 0 1 1 0 8 0 amappl3 96 6127 0 6014 5 1 4 4 0 8 0 amappl2 88 640 0 583 2 0 2 2 0 8 0 amappl1 80 11396 0 10838 14 1 13 14 0 8 0 amappl 88 8677 0 8506 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 1 1 1 0 8 1 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 24 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1128 0 1098 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1128 0 1098 1 0 1 1 0 8 0 vmmpekpl 168 10729 0 10702 3 1 2 3 0 8 0 vmmpepl 168 76676 0 74748 95 6 89 95 0 357 2 vmsppl 368 1127 0 1098 4 1 3 4 0 8 0 rwobjpl 40 25367 0 20857 46 0 46 46 0 8 0 pdppl 4096 2263 0 2196 101 34 67 83 0 8 0 pvpl 32 515030 0 506583 130 24 106 110 0 265 19 pmappl 216 1127 0 1098 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 402 0 73 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff80002a7f9248,ffff80003c999850,ffff80003c9997a0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7f9248,ffff80003c999850,ffff80003c9997a0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c999850) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c999850) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfbee3a63e70, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff80002a7f9248,ffff80003c999850,ffff80003c9997a0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7f9248,ffff80003c999850,ffff80003c9997a0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c999850) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c999850) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfbee3a63e70, count: -3