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(ffff80003a522a68,ffff80002c905580,ffff80002c9054d0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80003a522a68,ffff80002c905580,ffff80002c9054d0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80002c905580) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002c905580) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x22d07c9d7e0, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff80002c9054a0 rbx 0 rdx 0xffff800001479600 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0x81d1b70ab3686286 r11 0xdce21caaa3df7685 r12 0xfffffd805e548d20 r13 0xdeadbeefdeadbeef r14 0xffff80000142c700 r15 0xa rip 0xffffffff830e5ff2 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002c905400 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=353198 pid=24575 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=83, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003a522cf8,0xffff80003a5234b8 process=0xffff8000ffff4db0 user=0xffff80002c900000, vmspace=0xfffffd806c286010 estcpu=33, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 40385 39937 33716 0 2 0 syz-executor 40385 470751 33716 0 3 0x4000080 fsleep syz-executor 47478 418243 30519 0 2 0 syz-executor 47478 289246 30519 0 3 0x4000080 fsleep syz-executor 22493 25993 36249 0 2 0 syz-executor 22493 324987 36249 0 3 0x4000080 fsleep syz-executor 92989 25103 35953 0 2 0 syz-executor 92989 320906 35953 0 3 0x4000080 fsleep syz-executor 68892 488837 96548 0 3 0x80 nanoslp syz-executor 68892 330877 96548 0 3 0x4000080 sbwait syz-executor 68892 33153 96548 0 3 0x4000080 fsleep syz-executor 88409 140988 74136 0 2 0 syz-executor 88409 273788 74136 0 3 0x4000080 fifor syz-executor 88409 67086 74136 0 2 0x4000000 syz-executor 88409 333439 74136 0 3 0x4000080 fsleep syz-executor 24575 198864 44278 0 2 0 syz-executor *24575 353198 44278 0 7 0x4000000 syz-executor 24575 442891 44278 0 3 0x4000080 fsleep syz-executor 24575 144547 44278 0 2 0x4000000 syz-executor 74136 232287 64116 0 3 0x82 nanoslp syz-executor 31499 5494 0 0 3 0x14200 acct acct 30519 181220 64116 0 3 0x82 nanoslp syz-executor 67290 112471 0 0 3 0x14200 bored sosplice 36249 17594 64116 0 3 0x82 nanoslp syz-executor 44278 373173 64116 0 3 0x82 nanoslp syz-executor 86337 58310 64116 0 3 0x82 nanoslp syz-executor 33716 446468 64116 0 3 0x82 nanoslp syz-executor 35953 134349 64116 0 3 0x82 nanoslp syz-executor 96548 329590 64116 0 3 0x82 nanoslp syz-executor 64116 416431 46408 0 3 0x82 kqread syz-executor 46408 486768 73884 0 3 0x10008a sigsusp ksh 73884 392906 10813 0 3 0x98 kqread sshd-session 10813 118201 52014 0 3 0x92 kqread sshd-session 75566 407915 1 0 3 0x100083 ttyin getty 52014 488121 1 0 3 0x88 kqread sshd 32395 8771 82284 73 3 0x1100090 kqread syslogd 82284 468074 1 0 3 0x100082 sbwait syslogd 66877 500699 1 0 3 0x100080 kqread resolvd 36540 474153 4169 77 3 0x100092 kqread dhcpleased 51074 142548 4169 77 3 0x100092 kqread dhcpleased 4169 120964 1 0 3 0x80 kqread dhcpleased 60551 29579 0 0 3 0x14200 bored smr 4642 181133 0 0 2 0x14200 zerothread 87547 523767 0 0 3 0x14200 aiodoned aiodoned 99656 188842 0 0 3 0x14200 syncer update 43280 354998 0 0 3 0x14200 cleaner cleaner 65690 397753 0 0 3 0x14200 reaper reaper 81699 515039 0 0 3 0x14200 pgdaemon pagedaemon 73916 435659 0 0 3 0x14200 bored viomb 93035 228368 0 0 3 0x40014200 acpi0 acpi0 10601 243040 0 0 3 0x14200 bored softnet3 40382 295323 0 0 3 0x14200 bored softnet2 97233 232242 0 0 3 0x14200 bored softnet1 31477 95720 0 0 3 0x14200 bored softnet0 60803 45333 0 0 3 0x14200 smrbar systqmp 18007 75735 0 0 3 0x14200 bored systq 53673 497480 0 0 3 0x40014200 tmoslp softclock 72753 38152 0 0 3 0x40014200 idle0 1 120809 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 10210 11380K 11394K 166960K 12723 0 pcb 17 16K 17K 166960K 255 0 rtable 149 5K 7K 166960K 534 0 pf 31 13K 15K 166960K 78 0 ifaddr 32 5K 7K 166960K 78 0 ifgroup 50 2K 2K 166960K 97 0 sysctl 4 1K 9K 166960K 13 0 counters 32 17K 18K 166960K 53 0 ioctlops 0 0K 4K 166960K 134 0 iov 1 2K 16K 166960K 219 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1461 92K 92K 166960K 2466 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 15 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 94 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 1047 0 sigio 0 0K 0K 166960K 57 0 proc 60 59K 83K 166960K 622 0 subproc 72 4K 4K 166960K 93 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 87 0 in_multi 55 4K 7K 166960K 164 0 ether_multi 1 0K 0K 166960K 9 0 mrt 0 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 109 493K 493K 166960K 109 0 exec 0 0K 1K 166960K 554 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 239 151K 175K 166960K 11020 0 UVM aobj 56 4K 4K 166960K 57 0 pinsyscall 39 78K 94K 166960K 2120 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 48 0 NDP 11 0K 2K 166960K 50 0 temp 69 8673K 8741K 166960K 39143 0 kqueue 14 22K 36K 166960K 178 0 SYN cache 2 8K 16K 166960K 3 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 94 0 91 1 0 1 1 0 8 0 rtentry 136 158 0 102 4 0 4 4 0 8 0 unpcb 144 686 0 665 7 3 4 4 0 8 2 syncache 336 6 0 6 2 1 1 1 0 8 1 tcpqe 32 10 0 10 2 1 1 1 0 8 1 tcpcb 736 415 0 407 13 6 7 7 0 8 6 arp 88 25 0 15 1 0 1 1 0 8 0 ipq 40 2 0 1 1 0 1 1 0 8 0 ipqe 40 2 0 1 1 0 1 1 0 8 0 inpcb 328 1117 0 1103 15 8 7 10 0 8 5 ip6q 72 7 0 4 2 1 1 1 0 8 0 ip6af 40 11 0 8 2 1 1 1 0 8 0 nd6 104 34 0 23 1 0 1 1 0 8 0 pkpcb 40 8 0 8 2 1 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 1 0 1 0 8 0 ppxss 1072 16 0 16 2 1 1 1 0 8 1 pppxif 1384 1 0 1 1 0 1 1 0 8 1 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 2 0 0 1 0 1 1 0 8 0 pfstate 384 1 0 0 1 0 1 1 0 8 0 pfrule 1344 5 0 5 2 1 1 1 0 8 1 rttmr 136 2 0 2 2 1 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 759 0 460 29 3 26 29 0 8 6 art_table 40 762 0 460 5 0 5 5 0 8 0 art_node 32 155 0 103 1 0 1 1 0 8 0 sysvmsgpl 40 45 0 39 1 0 1 1 0 8 0 semapl 112 92 0 82 1 0 1 1 0 8 0 shmpl 112 54 0 1 2 0 2 2 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 3213 0 1718 94 0 94 94 0 8 0 ffsino 248 3213 0 1718 94 0 94 94 0 8 0 nchpl 144 4639 0 2949 63 0 63 63 0 8 0 uvmvnodes 80 4070 0 0 84 0 84 84 0 8 0 vnodes 216 4070 0 0 227 0 227 227 0 8 0 namei 1024 15807 0 15807 2 1 1 2 0 8 1 kstatmem 264 58 0 36 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 16970 0 16970 15 7 8 8 1 8 8 plimitpl 152 336 0 320 1 0 1 1 0 8 0 sigapl 424 1307 0 1259 6 0 6 6 0 8 0 knotepl 120 36937 0 36887 25 15 10 17 0 8 8 kqueuepl 184 310 0 299 3 2 1 3 0 8 0 pipepl 296 219 0 192 3 0 3 3 0 8 0 fdescpl 440 1284 0 1254 5 1 4 5 0 8 0 filepl 120 8037 0 7816 12 1 11 11 0 8 2 lockfpl 104 858 0 852 2 0 2 2 0 8 1 lockfspl 48 344 0 339 1 0 1 1 0 8 0 sessionpl 144 26 0 18 1 0 1 1 0 8 0 pgrppl 48 114 0 98 1 0 1 1 0 8 0 ucredpl 104 1036 0 1024 1 0 1 1 0 8 0 zombiepl 144 1588 0 1587 1 0 1 1 0 8 0 processpl 1160 1307 0 1259 4 0 4 4 0 8 0 procpl 656 2775 0 2715 6 0 6 6 0 8 0 sosppl 168 12 0 12 2 1 1 1 0 8 1 sockpl 528 1968 0 1930 14 7 7 10 0 8 3 mcl64k 65536 103 0 102 2 1 1 1 0 8 0 mcl8k 8192 47 0 47 2 1 1 1 0 8 1 mcl4k 4096 3603 0 3549 15 7 8 15 0 8 0 mcl2k2 2112 1 0 1 1 1 0 1 0 8 0 mcl2k 2048 1461 0 1448 7 4 3 5 0 8 1 mtagpl 96 53 0 24 1 0 1 1 0 8 0 mbufpl 256 13370 0 13184 17 0 17 17 0 8 0 bufpl 280 5981 0 124 419 0 419 419 0 8 0 anonpl 24 219516 0 216265 82 25 57 57 0 187 22 amapchunkpl 152 38055 0 37541 47 13 34 35 0 158 13 amappl16 200 4371 0 4335 30 18 12 15 0 8 8 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 115 0 105 1 0 1 1 0 8 0 amappl13 176 3 0 3 1 1 0 1 0 8 0 amappl12 168 1932 0 1902 3 1 2 3 0 8 0 amappl11 160 45 0 34 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 255 0 255 1 1 0 1 0 8 0 amappl8 136 19 0 18 1 0 1 1 0 8 0 amappl7 128 106 0 96 1 0 1 1 0 8 0 amappl6 120 191 0 188 1 0 1 1 0 8 0 amappl5 112 120 0 113 1 0 1 1 0 8 0 amappl4 104 308 0 291 1 0 1 1 0 8 0 amappl3 96 7090 0 6974 4 0 4 4 0 8 0 amappl2 88 672 0 615 2 0 2 2 0 8 0 amappl1 80 12128 0 11580 15 2 13 14 0 8 0 amappl 88 10135 0 9960 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 0 1 1 0 8 1 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 8 0 8 2 1 1 1 0 8 1 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 56 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1284 0 1254 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1284 0 1254 1 0 1 1 0 8 0 vmmpekpl 168 11600 0 11560 3 0 3 3 0 8 0 vmmpepl 168 85819 0 83894 102 7 95 95 0 357 10 vmsppl 360 1283 0 1254 4 1 3 4 0 8 0 rwobjpl 32 28537 0 23550 42 1 41 41 0 8 0 pdppl 4096 2575 0 2508 105 38 67 81 0 8 0 pvpl 32 583487 0 574675 176 36 140 140 0 265 45 pmappl 216 1283 0 1254 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 299 0 65 8 0 8 8 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff80003a522a68,ffff80002c905580,ffff80002c9054d0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80003a522a68,ffff80002c905580,ffff80002c9054d0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80002c905580) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002c905580) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x22d07c9d7e0, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff80003a522a68,ffff80002c905580,ffff80002c9054d0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80003a522a68,ffff80002c905580,ffff80002c9054d0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80002c905580) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002c905580) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x22d07c9d7e0, count: -3