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(ffff80002a7f9ca8,ffff8000381777d0,ffff800038177720) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7f9ca8,ffff8000381777d0,ffff800038177720) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff8000381777d0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000381777d0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe1b00218f50, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff800038177700 rbx 0 rdx 0xffff800001468e00 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0x6695c6f69ab6114b r11 0x33386af96426a97d r12 0xfffffd806ba4ded8 r13 0xdeafbeaddeafbead r14 0xffff800000b50b00 r15 0xa rip 0xffffffff82b79872 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800038177660 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=3429 pid=85375 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=0xffff80002a7f94e0,0xffff80003c9a2a98 process=0xffff80003c988010 user=0xffff800038172000, vmspace=0xfffffd806ba53180 estcpu=29, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 1100 376397 56622 0 2 0 syz-executor 1100 289087 56622 0 3 0x4000080 fsleep syz-executor 15478 422745 96899 0 2 0 syz-executor 15478 437819 96899 0 3 0x4000080 fsleep syz-executor 14923 419168 31006 0 2 0 syz-executor 14923 174474 31006 0 3 0x4000080 fsleep syz-executor 53954 307699 59617 0 2 0 syz-executor 53954 171056 59617 0 3 0x4000080 fsleep syz-executor 97331 136784 41265 0 2 0 syz-executor 97331 454041 41265 0 3 0x4000080 fsleep syz-executor 85375 218181 74221 0 2 0 syz-executor *85375 3429 74221 0 7 0x4000000 syz-executor 85375 246375 74221 0 3 0x4000080 fsleep syz-executor 85375 133861 74221 0 2 0x4000000 syz-executor 64962 359951 56896 -1 3 0x90 nanoslp syz-executor 64962 316834 56896 -1 2 0x4000010 syz-executor 64962 494998 56896 -1 3 0x4000090 fsleep syz-executor 64962 388307 56896 -1 3 0x4000090 fsleep syz-executor 19416 53035 0 0 3 0x14200 bored sosplice 74221 55890 63912 0 3 0x82 nanoslp syz-executor 96899 38929 63912 0 3 0x82 nanoslp syz-executor 59617 280999 63912 0 3 0x82 nanoslp syz-executor 41265 509064 63912 0 3 0x82 nanoslp syz-executor 31006 291732 63912 0 3 0x82 nanoslp syz-executor 56622 400994 63912 0 3 0x82 nanoslp syz-executor 56896 402449 63912 0 3 0x82 nanoslp syz-executor 63529 23336 63912 0 3 0x82 wait syz-executor 63912 514270 3388 0 3 0x82 kqread syz-executor 3388 210411 96078 0 3 0x10008a sigsusp ksh 96078 291178 97332 0 3 0x98 kqread sshd-session 97332 514453 41730 0 3 0x92 kqread sshd-session 98754 54743 1 0 3 0x100083 ttyin getty 41730 506707 1 0 3 0x88 kqread sshd 22088 154016 64138 73 3 0x1100090 kqread syslogd 64138 489115 1 0 3 0x100082 sbwait syslogd 70381 469641 1 0 3 0x100080 kqread resolvd 70656 484995 34627 77 3 0x100092 kqread dhcpleased 21926 304091 34627 77 3 0x100092 kqread dhcpleased 34627 72069 1 0 3 0x80 kqread dhcpleased 46263 313355 0 0 3 0x14200 bored smr 81311 217373 0 0 2 0x14200 zerothread 54976 299547 0 0 3 0x14200 aiodoned aiodoned 39863 232523 0 0 3 0x14200 syncer update 81267 194154 0 0 3 0x14200 cleaner cleaner 99026 125771 0 0 3 0x14200 reaper reaper 9187 140698 0 0 3 0x14200 pgdaemon pagedaemon 25514 359591 0 0 3 0x14200 bored viomb 60580 492812 0 0 3 0x40014200 acpi0 acpi0 83786 171047 0 0 3 0x14200 bored softnet7 78129 278144 0 0 3 0x14200 bored softnet6 23907 474871 0 0 3 0x14200 bored softnet5 4640 242094 0 0 3 0x14200 bored softnet4 52224 98458 0 0 3 0x14200 bored softnet3 68405 89362 0 0 3 0x14200 bored softnet2 19485 141930 0 0 3 0x14200 bored softnet1 88737 154470 0 0 3 0x14200 bored softnet0 40066 380133 0 0 3 0x14200 smrbar systqmp 99903 369053 0 0 3 0x14200 bored systq 53136 317226 0 0 3 0x40014200 tmoslp softclock 48897 14252 0 0 3 0x40014200 idle0 1 383433 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 10189 11070K 12189K 166960K 12079 0 pcb 17 12K 12K 166960K 99 0 rtable 177 6K 7K 166960K 331 0 pf 30 12K 14K 166960K 59 0 ifaddr 38 6K 8K 166960K 62 0 ifgroup 50 2K 2K 166960K 85 0 sysctl 3 1K 9K 166960K 10 0 counters 32 17K 18K 166960K 45 0 ioctlops 0 0K 4K 166960K 127 0 iov 0 0K 12K 166960K 12 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1398 88K 88K 166960K 1672 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 8 0K 0K 166960K 13 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 456 0 sigio 0 0K 0K 166960K 3 0 proc 60 59K 124K 166960K 550 0 subproc 72 4K 4K 166960K 83 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 94 0 in_multi 87 6K 7K 166960K 117 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 2K 166960K 377 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 246 143K 156K 166960K 5515 0 UVM aobj 15 2K 2K 166960K 15 0 pinsyscall 39 78K 96K 166960K 1501 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 25 0 NDP 11 0K 2K 166960K 39 0 temp 48 8637K 8702K 166960K 14935 0 kqueue 14 22K 32K 166960K 94 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 55 0 52 1 0 1 1 0 8 0 rtentry 136 117 0 42 4 0 4 4 0 8 0 unpcb 144 183 0 166 1 0 1 1 0 8 0 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpqe 32 2 0 2 2 1 1 1 0 8 1 tcpcb 736 121 0 113 5 3 2 4 0 8 1 arp 88 14 0 4 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 4 0 3 1 0 1 1 0 8 0 inpcb 328 334 0 322 4 2 2 4 0 8 0 ip6q 72 4 0 2 1 0 1 1 0 8 0 ip6af 40 6 0 4 1 0 1 1 0 8 0 nd6 104 22 0 7 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1072 7 0 7 1 0 1 1 0 8 1 pppxif 1384 1 0 1 1 0 1 1 0 8 1 pfrule 1344 2 0 2 1 1 0 1 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 575 0 184 32 3 29 32 0 8 1 art_table 40 576 0 184 6 0 6 6 0 8 0 art_node 32 117 0 51 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 6 1 0 1 1 0 8 0 semapl 112 8 0 2 1 0 1 1 0 8 0 shmpl 112 12 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2093 0 599 95 0 95 95 0 8 0 ffsino 256 2093 0 599 95 0 95 95 0 8 0 nchpl 144 2687 0 1009 63 0 63 63 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 uvmvnodes 80 2378 0 0 49 0 49 49 0 8 0 vnodes 216 2378 0 0 133 0 133 133 0 8 0 namei 1024 8567 0 8567 4 2 2 2 0 8 2 kstatmem 264 42 0 20 2 0 2 2 0 8 0 scsiplug 72 5 0 5 2 1 1 1 0 8 1 scxspl 216 8829 0 8829 8 7 1 8 1 8 1 plimitpl 152 78 0 61 1 0 1 1 0 8 0 sigapl 424 726 0 675 7 1 6 7 0 8 0 knotepl 120 31683 0 31626 22 13 9 15 0 8 7 kqueuepl 184 127 0 117 1 0 1 1 0 8 0 pipepl 304 124 0 97 3 0 3 3 0 8 0 fdescpl 448 704 0 674 5 1 4 5 0 8 0 filepl 120 3227 0 3013 9 0 9 9 0 8 0 lockfpl 104 123 0 121 1 0 1 1 0 8 0 lockfspl 48 61 0 59 1 0 1 1 0 8 0 sessionpl 144 24 0 16 1 0 1 1 0 8 0 pgrppl 48 39 0 23 1 0 1 1 0 8 0 ucredpl 104 496 0 484 1 0 1 1 0 8 0 zombiepl 144 761 0 760 1 0 1 1 0 8 0 processpl 1168 726 0 675 5 1 4 5 0 8 0 procpl 664 1224 0 1162 7 1 6 7 0 8 0 sosppl 168 2 0 2 1 0 1 1 0 8 1 sockpl 552 583 0 551 5 1 4 5 0 8 1 mcl64k 65536 35 0 35 2 1 1 1 0 8 1 mcl16k 16384 2 0 2 1 1 0 1 0 8 0 mcl9k 9216 1 0 1 1 1 0 1 0 8 0 mcl8k 8192 13 0 13 2 1 1 1 0 8 1 mcl4k 4096 2829 0 2781 12 5 7 12 0 8 0 mcl2k2 2112 1 0 1 1 0 1 1 0 8 1 mcl2k 2048 598 0 592 2 0 2 2 0 8 0 mtagpl 96 140 0 8 4 0 4 4 0 8 0 mbufpl 256 15457 0 15170 21 0 21 21 0 8 0 bufpl 280 3341 0 117 231 0 231 231 0 8 0 anonpl 24 139815 0 136119 50 15 35 38 0 187 9 amapchunkpl 152 17836 0 17263 33 6 27 27 0 158 4 amappl16 200 2250 0 2219 6 3 3 5 0 8 1 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 109 0 99 1 0 1 1 0 8 0 amappl13 176 2 0 2 1 1 0 1 0 8 0 amappl12 168 1335 0 1305 3 1 2 3 0 8 0 amappl11 160 48 0 37 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 242 0 242 1 1 0 1 0 8 0 amappl8 136 25 0 23 1 0 1 1 0 8 0 amappl7 128 110 0 100 1 0 1 1 0 8 0 amappl6 120 184 0 181 1 0 1 1 0 8 0 amappl5 112 121 0 114 1 0 1 1 0 8 0 amappl4 104 273 0 258 1 0 1 1 0 8 0 amappl3 96 3204 0 3079 4 0 4 4 0 8 0 amappl2 88 639 0 585 2 0 2 2 0 8 0 amappl1 80 9730 0 9173 14 0 14 14 0 8 0 amappl 88 4797 0 4613 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 128 253 0 253 1 1 0 1 0 8 0 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 14 0 0 1 0 1 1 0 8 0 uaddrrnd 24 704 0 674 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 704 0 674 1 0 1 1 0 8 0 vmmpekpl 168 7175 0 7142 2 0 2 2 0 8 0 vmmpepl 168 50246 0 48320 92 3 89 90 0 357 5 vmsppl 368 703 0 674 4 1 3 4 0 8 0 rwobjpl 40 18421 0 15147 35 1 34 34 0 8 0 pdppl 4096 1415 0 1348 99 32 67 83 0 8 0 pvpl 32 336011 0 326049 130 28 102 108 0 265 17 pmappl 216 703 0 674 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 393 0 54 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff80002a7f9ca8,ffff8000381777d0,ffff800038177720) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7f9ca8,ffff8000381777d0,ffff800038177720) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff8000381777d0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000381777d0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe1b00218f50, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff80002a7f9ca8,ffff8000381777d0,ffff800038177720) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7f9ca8,ffff8000381777d0,ffff800038177720) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff8000381777d0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000381777d0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe1b00218f50, count: -3