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(ffff80002a86a558,ffff80002a84b700,ffff80002a84b650) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a86a558,ffff80002a84b700,ffff80002a84b650) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80002a84b700) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a84b700) at syscall+0x97e sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6b8ce4c6300, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff80002a84b620 rbx 0 rdx 0 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0xf93d0b2548593bfe r11 0xb1720a625b646e52 r12 0xfffffd806457cc80 r13 0xdeadbeefdeadbeef r14 0xffff8000015f0a00 r15 0xa rip 0xffffffff81e4c212 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002a84b580 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=145799 pid=41060 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=50, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a86a2c8,0xffff80002a86b4c8 process=0xffff8000ffff8498 user=0xffff80002a846000, vmspace=0xfffffd807376c178 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 81229 138521 16775 -1 2 0x10 syz-executor 81229 243118 16775 -1 3 0x4000090 kqread syz-executor 81229 301444 16775 -1 3 0x4000090 fsleep syz-executor 41060 115993 55676 0 2 0 syz-executor *41060 145799 55676 0 7 0x4000000 syz-executor 41060 167549 55676 0 2 0x4000000 syz-executor 41060 466349 55676 0 3 0x4000080 fsleep syz-executor 99211 113252 7659 0 2 0 syz-executor 99211 263230 7659 0 3 0x4000080 msgwait syz-executor 99211 475143 7659 0 3 0x4000080 kqsel syz-executor 99211 338228 7659 0 2 0x4000000 syz-executor 23422 65024 0 0 3 0x14200 acct acct 87600 6062 97596 0 3 0x3000 suspend syz-executor 87600 1977 97596 0 2 0x4081000 syz-executor 87600 147119 97596 0 3 0x4081000 inode syz-executor 87600 65120 97596 0 3 0x4081000 inode syz-executor 16775 182179 90100 0 3 0x82 nanoslp syz-executor 83038 502451 90100 0 2 0x2 syz-executor 66488 429013 1 0 3 0x100083 ttyopn getty 97596 272391 90100 0 3 0x82 wait syz-executor 7079 282677 0 0 3 0x14280 nfsidl nfsio 81021 55078 0 0 3 0x14280 nfsidl nfsio 77490 105387 0 0 3 0x14280 nfsidl nfsio 58133 400776 0 0 3 0x14280 nfsidl nfsio 22615 193970 0 0 3 0x14280 nfsidl nfsio 37062 483808 0 0 3 0x14280 nfsidl nfsio 16020 226650 0 0 3 0x14280 nfsidl nfsio 61879 279775 0 0 3 0x14280 nfsidl nfsio 44143 95728 0 0 3 0x14280 nfsidl nfsio 95043 515053 0 0 3 0x14280 nfsidl nfsio 79685 147345 0 0 3 0x14280 nfsidl nfsio 64843 464044 0 0 3 0x14280 nfsidl nfsio 75477 353940 0 0 3 0x14280 nfsidl nfsio 11846 400030 0 0 3 0x14280 nfsidl nfsio 91278 334332 0 0 3 0x14280 nfsidl nfsio 38970 140070 0 0 3 0x14280 nfsidl nfsio 97524 283834 0 0 3 0x14280 nfsidl nfsio 42982 423308 0 0 3 0x14280 nfsidl nfsio 81756 295448 0 0 3 0x14280 nfsidl nfsio 94294 295140 0 0 3 0x14280 nfsidl nfsio 89637 214855 0 0 3 0x14200 bored sosplice 55676 321484 90100 0 3 0x82 nanoslp syz-executor 42062 283759 90100 0 2 0x2 syz-executor 87062 277680 90100 0 3 0x82 nanoslp syz-executor 32613 448376 90100 0 3 0x82 nanoslp syz-executor 7659 33513 90100 0 3 0x82 nanoslp syz-executor 90100 145412 18527 0 3 0x82 kqread syz-executor 18527 14333 89517 0 3 0x10008a sigsusp ksh 89517 40770 25878 0 3 0x98 kqread sshd-session 25878 49095 12290 0 3 0x92 kqread sshd-session 12290 265339 1 0 3 0x88 kqread sshd 80357 265161 3755 73 3 0x1100090 kqread syslogd 3755 49689 1 0 3 0x100082 sbwait syslogd 4144 262767 1 0 3 0x100080 kqread resolvd 52223 342233 89077 77 3 0x100092 kqread dhcpleased 38089 455196 89077 77 3 0x100092 kqread dhcpleased 89077 348583 1 0 3 0x80 kqread dhcpleased 50651 60574 0 0 3 0x14200 bored smr 84985 383865 0 0 2 0x14200 zerothread 50717 255759 0 0 3 0x14200 aiodoned aiodoned 74271 336522 0 0 3 0x14200 syncer update 92498 141247 0 0 3 0x14200 cleaner cleaner 88664 21132 0 0 3 0x14200 reaper reaper 85867 300933 0 0 3 0x14200 pgdaemon pagedaemon 38575 419268 0 0 3 0x14200 bored viomb 5700 343353 0 0 3 0x40014200 acpi0 acpi0 20389 199542 0 0 3 0x14200 bored softnet3 78040 260773 0 0 3 0x14200 bored softnet2 9820 513672 0 0 3 0x14200 bored softnet1 83869 310965 0 0 3 0x14200 bored softnet0 68449 256161 0 0 3 0x14200 bored systqmp 4468 167736 0 0 3 0x14200 bored systq 20293 105298 0 0 3 0x40014200 tmoslp softclock 15287 134555 0 0 3 0x40014200 idle0 1 90199 0 0 3 0x80082 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 10231 11102K 11605K 166960K 12452 0 pcb 19 15K 16K 166960K 324 0 rtable 216 12K 12K 166960K 588 0 pf 39 14K 18K 166960K 137 0 ifaddr 41 7K 8K 166960K 101 0 ifgroup 61 2K 2K 166960K 150 0 sysctl 3 1K 9K 166960K 14 0 counters 34 18K 18K 166960K 82 0 ioctlops 0 0K 4K 166960K 350 0 iov 0 0K 24K 166960K 116 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1429 90K 90K 166960K 2622 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 20 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 146 0 dirhash 12 2K 2K 166960K 42 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 110K 166960K 1356 0 sigio 2 0K 0K 166960K 35 0 proc 60 59K 124K 166960K 716 0 subproc 72 4K 4K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 318 0 in_multi 78 5K 7K 166960K 168 0 ether_multi 1 0K 0K 166960K 15 0 mrt 3 0K 0K 166960K 10 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 271 1208K 1208K 166960K 271 0 exec 0 0K 1K 166960K 707 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 238 164K 177K 166960K 13081 0 UVM aobj 19 2K 2K 166960K 19 0 pinsyscall 37 74K 96K 166960K 2478 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 91 0 NDP 13 0K 2K 166960K 68 0 temp 71 8685K 8752K 166960K 49215 0 kqueue 15 24K 32K 166960K 255 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 120 266 0 263 3 2 1 3 0 8 0 rtentry 136 172 0 86 4 0 4 4 0 8 0 unpcb 144 1262 0 1246 11 5 6 6 0 8 5 syncache 336 7 0 7 1 1 0 1 0 8 0 tcpqe 32 4 0 4 1 1 0 1 0 8 0 tcpcb 736 618 0 609 10 6 4 7 0 8 3 arp 88 27 0 11 1 0 1 1 0 8 0 ipq 40 2 0 1 1 0 1 1 0 8 0 ipqe 40 5 0 4 1 0 1 1 0 8 0 inpcb 328 1713 0 1699 16 8 8 10 0 8 6 ip6q 72 22 0 20 1 0 1 1 0 8 0 ip6af 40 43 0 41 1 0 1 1 0 8 0 nd6 104 38 0 16 1 0 1 1 0 8 0 pkpcb 40 68 0 68 2 1 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1072 39 0 39 2 1 1 1 0 8 1 pppxif 1384 3 0 3 2 1 1 1 0 8 1 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pfosfp 40 1 0 0 1 0 1 1 0 8 0 pfosfpen 112 1 0 0 1 0 1 1 0 8 0 pfrktable 1344 5 0 4 1 0 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 5 0 4 1 0 1 1 0 8 0 pfstitem 24 3 0 0 1 0 1 1 0 8 0 pfstkey 128 9 0 6 1 0 1 1 0 8 0 pfstate 384 5 0 3 1 0 1 1 0 8 0 pfrule 1344 40 0 39 1 0 1 1 0 8 0 rttmr 136 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 726 0 370 31 6 25 31 0 8 0 art_table 32 729 0 370 4 0 4 4 0 8 0 art_node 16 166 0 91 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 8 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 110 0 100 1 0 1 1 0 8 0 shmpl 112 16 0 0 1 0 1 1 0 8 0 dirhash 1024 38 0 21 3 0 3 3 0 8 0 dino2pl 256 4095 0 2584 95 0 95 95 0 8 0 ffsino 248 4095 0 2584 95 0 95 95 0 8 0 nchpl 144 5985 0 4295 63 0 63 63 0 8 0 rtmask 32 9 0 9 2 1 1 1 0 8 1 uvmvnodes 80 4642 0 0 95 0 95 95 0 8 0 vnodes 216 4642 0 0 258 0 258 258 0 8 0 namei 1024 21906 0 21903 3 2 1 2 0 8 0 kstatmem 264 92 0 66 3 0 3 3 0 8 1 scsiplug 72 5 0 5 2 1 1 1 0 8 1 scxspl 216 22857 0 22857 9 7 2 8 1 8 2 plimitpl 152 687 0 669 1 0 1 1 0 8 0 sigapl 424 1651 0 1585 8 0 8 8 0 8 0 knotepl 120 66972 0 66919 32 21 11 17 0 8 8 kqueuepl 184 516 0 505 5 2 3 3 0 8 2 pipepl 296 222 0 195 3 0 3 3 0 8 0 fdescpl 440 1611 0 1583 5 1 4 5 0 8 0 filepl 120 11924 0 11704 15 4 11 12 0 8 2 lockfpl 104 691 0 688 2 1 1 2 0 8 0 lockfspl 48 231 0 228 1 0 1 1 0 8 0 sessionpl 144 28 0 20 1 0 1 1 0 8 0 pgrppl 48 71 0 55 1 0 1 1 0 8 0 ucredpl 104 2626 0 2613 1 0 1 1 0 8 0 zombiepl 144 1769 0 1766 1 0 1 1 0 8 0 processpl 1160 1651 0 1585 5 0 5 5 0 8 0 procpl 656 3529 0 3452 8 0 8 8 0 8 0 sosppl 168 12 0 12 2 1 1 1 0 8 1 sockpl 528 3380 0 3347 19 7 12 12 0 8 7 mcl64k 65536 111 0 111 2 1 1 1 0 8 1 mcl16k 16384 3 0 3 1 0 1 1 0 8 1 mcl12k 12288 2 0 2 1 1 0 1 0 8 0 mcl9k 9216 3 0 3 1 1 0 1 0 8 0 mcl8k 8192 12 0 11 1 0 1 1 0 8 0 mcl4k 4096 4032 0 3982 16 8 8 15 0 8 1 mcl2k2 2112 1 0 1 1 1 0 1 0 8 0 mcl2k 2048 2106 0 2103 4 2 2 4 0 8 1 mtagpl 96 20 0 16 1 0 1 1 0 8 0 mbufpl 256 18238 0 18134 18 4 14 16 0 8 3 bufpl 280 7605 0 1378 446 0 446 446 0 8 0 anonpl 24 193941 0 186583 83 21 62 62 0 187 17 amapchunkpl 152 44805 0 44290 51 17 34 38 0 158 12 amappl16 200 2900 0 2626 32 9 23 24 0 8 8 amappl15 192 1 0 1 1 1 0 1 0 8 0 amappl14 184 116 0 106 1 0 1 1 0 8 0 amappl13 176 3 0 3 1 1 0 1 0 8 0 amappl12 168 2273 0 2245 3 1 2 3 0 8 0 amappl11 160 57 0 47 1 0 1 1 0 8 0 amappl10 152 2 0 2 1 1 0 1 0 8 0 amappl9 144 273 0 273 1 1 0 1 0 8 0 amappl8 136 18 0 16 1 0 1 1 0 8 0 amappl7 128 107 0 96 1 0 1 1 0 8 0 amappl6 120 201 0 197 1 0 1 1 0 8 0 amappl5 112 126 0 118 1 0 1 1 0 8 0 amappl4 104 307 0 288 1 0 1 1 0 8 0 amappl3 96 9156 0 9048 4 0 4 4 0 8 0 amappl2 88 676 0 618 2 0 2 2 0 8 0 amappl1 80 13599 0 13063 13 0 13 13 0 8 0 amappl 88 12116 0 11944 5 0 5 5 0 92 0 dma8192 8192 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 255 0 255 2 1 1 1 0 8 1 dma64 64 7 0 7 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 18 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1611 0 1583 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1611 0 1583 1 0 1 1 0 8 0 vmmpekpl 168 13068 0 13018 3 0 3 3 0 8 0 vmmpepl 168 103077 0 100985 111 8 103 103 0 357 7 vmsppl 360 1610 0 1583 4 1 3 4 0 8 0 rwobjpl 32 30339 0 24569 48 0 48 48 0 8 1 pdppl 4096 3228 0 3166 104 38 66 82 0 8 4 pvpl 32 639488 0 626853 180 43 137 137 0 265 30 pmappl 216 1610 0 1583 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 296 0 71 8 0 8 8 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff80002a86a558,ffff80002a84b700,ffff80002a84b650) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a86a558,ffff80002a84b700,ffff80002a84b650) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80002a84b700) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a84b700) at syscall+0x97e sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6b8ce4c6300, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff80002a86a558,ffff80002a84b700,ffff80002a84b650) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a86a558,ffff80002a84b700,ffff80002a84b650) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80002a84b700) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a84b700) at syscall+0x97e sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6b8ce4c6300, count: -3