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(ffff80002a8227e0,ffff800033d42ff0,ffff800033d42f40) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a8227e0,ffff800033d42ff0,ffff800033d42f40) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff800033d42ff0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800033d42ff0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4701b8805e0, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff800033d42f20 rbx 0 rdx 0xffff800001435e80 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0x611a2c75a61d0df6 r11 0xa9f46b51bfaaea25 r12 0xfffffd8065413d70 r13 0xdeaf4152deaf4152 r14 0xffff8000014f0b00 r15 0xa rip 0xffffffff828ca162 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800033d42e80 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=428192 pid=91234 tcnt=6 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=84, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a8234d8,0xffff80003b15f7a0 process=0xffff80003c9be910 user=0xffff800033d3e000, vmspace=0xfffffd806c0f78b0 estcpu=34, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 33465 165767 18627 0 2 0 syz-executor 33465 64061 18627 0 2 0x4000000 syz-executor 50985 80817 68189 0 2 0 syz-executor 50985 168665 68189 0 3 0x4000080 fsleep syz-executor 5651 247952 66616 0 2 0 syz-executor 5651 213901 66616 0 3 0x4000080 fsleep syz-executor 5651 138769 66616 0 3 0x4000080 fsleep syz-executor 6580 96382 26283 0 2 0 syz-executor 6580 341886 26283 0 3 0x4000080 fsleep syz-executor 91234 50043 94850 0 2 0 syz-executor *91234 428192 94850 0 7 0x4000000 syz-executor 91234 155778 94850 0 3 0x4000080 kqread syz-executor 91234 414078 94850 0 3 0x4000080 fsleep syz-executor 91234 60878 94850 0 2 0x4000000 syz-executor 91234 452369 94850 0 2 0x4000000 syz-executor 55005 291877 0 0 3 0x14280 nfsidl nfsio 94842 487174 0 0 3 0x14280 nfsidl nfsio 67427 523879 0 0 3 0x14280 nfsidl nfsio 92511 119604 0 0 3 0x14280 nfsidl nfsio 82152 351380 0 0 3 0x14280 nfsidl nfsio 42187 247694 0 0 3 0x14280 nfsidl nfsio 62440 289112 0 0 3 0x14280 nfsidl nfsio 57860 483959 0 0 3 0x14280 nfsidl nfsio 11298 342498 0 0 3 0x14280 nfsidl nfsio 24227 92764 0 0 3 0x14280 nfsidl nfsio 98600 199042 0 0 3 0x14280 nfsidl nfsio 26397 489640 0 0 3 0x14280 nfsidl nfsio 46988 38023 0 0 3 0x14280 nfsidl nfsio 23319 289803 0 0 3 0x14280 nfsidl nfsio 25385 176913 0 0 3 0x14280 nfsidl nfsio 20763 197258 0 0 3 0x14280 nfsidl nfsio 3724 330794 0 0 3 0x14280 nfsidl nfsio 10549 497926 0 0 3 0x14280 nfsidl nfsio 23270 166841 0 0 3 0x14280 nfsidl nfsio 33972 173338 0 0 3 0x14280 nfsidl nfsio 89723 276990 0 0 3 0x14200 bored sosplice 66616 123930 27705 0 3 0x82 nanoslp syz-executor 68189 16962 27705 0 3 0x82 nanoslp syz-executor 5106 513730 27705 0 2 0x2 syz-executor 48740 98134 27705 0 2 0x2 syz-executor 18627 393935 27705 0 3 0x82 nanoslp syz-executor 30132 13872 27705 0 3 0x82 nanoslp syz-executor 94850 20526 27705 0 3 0x82 nanoslp syz-executor 26283 184456 27705 0 3 0x82 nanoslp syz-executor 27705 107861 74883 0 3 0x82 kqread syz-executor 74883 19811 36805 0 3 0x10008a sigsusp ksh 36805 219071 5748 0 3 0x98 kqread sshd-session 5748 120654 70008 0 3 0x92 kqread sshd-session 24947 407279 1 0 3 0x100083 ttyin getty 70008 296868 1 0 3 0x88 kqread sshd 77916 509866 88098 73 3 0x1100090 kqread syslogd 88098 337478 1 0 3 0x100082 sbwait syslogd 60958 147796 1 0 3 0x100080 kqread resolvd 35068 43966 29539 77 3 0x100092 kqread dhcpleased 7744 257178 29539 77 3 0x100092 kqread dhcpleased 29539 27694 1 0 3 0x80 kqread dhcpleased 36138 22875 0 0 3 0x14200 bored smr 83843 392697 0 0 2 0x14200 zerothread 57956 168645 0 0 3 0x14200 aiodoned aiodoned 16471 252322 0 0 3 0x14200 syncer update 61792 80265 0 0 3 0x14200 cleaner cleaner 92565 387983 0 0 3 0x14200 reaper reaper 7361 342618 0 0 3 0x14200 pgdaemon pagedaemon 46161 232127 0 0 3 0x14200 bored viomb 13766 66069 0 0 3 0x40014200 acpi0 acpi0 52123 181820 0 0 3 0x14200 bored softnet7 21178 135259 0 0 3 0x14200 bored softnet6 87907 108549 0 0 3 0x14200 bored softnet5 4108 498637 0 0 3 0x14200 bored softnet4 10205 323246 0 0 3 0x14200 bored softnet3 6053 220412 0 0 3 0x14200 bored softnet2 27489 206641 0 0 3 0x14200 bored softnet1 83959 460763 0 0 3 0x14200 bored softnet0 90151 143820 0 0 3 0x14200 bored systqmp 29421 124439 0 0 3 0x14200 bored systq 89463 394020 0 0 3 0x40014200 tmoslp softclock 23009 135923 0 0 3 0x40014200 idle0 1 172319 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 10216 11072K 11570K 166960K 12880 0 pcb 17 13K 13K 166960K 206 0 rtable 211 10K 10K 166960K 808 0 pf 34 13K 20K 166960K 187 0 ifaddr 41 7K 8K 166960K 84 0 ifgroup 50 2K 2K 166960K 130 0 sysctl 4 1K 9K 166960K 12 0 counters 32 17K 18K 166960K 141 0 ioctlops 0 0K 4K 166960K 431 0 iov 0 0K 36K 166960K 58 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1437 90K 91K 166960K 2521 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 26 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 106K 166960K 990 0 sigio 0 0K 0K 166960K 13 0 proc 60 59K 124K 166960K 538 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 182 0 in_multi 98 7K 7K 166960K 138 0 ether_multi 1 0K 0K 166960K 13 0 mrt 1 0K 0K 166960K 11 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 259 1155K 1155K 166960K 259 0 exec 0 0K 1K 166960K 539 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 5 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 225 143K 166K 166960K 10415 0 UVM aobj 22 2K 4K 166960K 25 0 pinsyscall 39 78K 96K 166960K 2030 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 63 0 NDP 11 0K 2K 166960K 54 0 temp 65 8641K 8718K 166960K 38449 0 kqueue 14 22K 30K 166960K 193 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 120 245 0 242 5 2 3 3 0 8 2 rtentry 136 310 0 226 4 0 4 4 0 8 0 unpcb 144 697 0 681 5 3 2 3 0 8 1 syncache 336 8 0 8 3 2 1 1 0 8 1 tcpqe 32 2 0 2 2 1 1 1 0 8 1 tcpcb 736 232 0 226 4 3 1 4 0 8 0 arp 88 76 0 66 1 0 1 1 0 8 0 ipq 40 4 0 4 1 0 1 1 0 8 1 ipqe 40 16 0 16 1 0 1 1 0 8 1 inpcb 328 884 0 874 10 3 7 7 0 8 5 ip6q 72 22 0 19 3 2 1 1 0 8 0 ip6af 40 43 0 40 3 2 1 1 0 8 0 nd6 104 19 0 0 1 0 1 1 0 8 0 pkpcb 40 11 0 11 3 2 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 101 0 101 3 2 1 1 0 8 1 pppxif 1384 4 0 4 3 2 1 1 0 8 1 pfstscr 40 9 0 9 2 2 0 1 0 8 0 pfrktable 1344 2 0 2 1 0 1 1 0 8 1 pfanchor 1288 2 0 1 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 1 0 0 1 0 1 1 0 8 0 pfstkey 128 13 0 12 3 2 1 1 0 8 0 pfstate 384 7 0 6 3 2 1 1 0 8 0 pfrule 1344 74 0 74 3 2 1 1 0 8 1 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 256 734 0 330 42 6 36 40 0 8 8 art_table 40 737 0 330 7 0 7 7 0 8 1 art_node 32 310 0 237 3 0 3 3 0 8 1 sysvmsgpl 40 11 0 6 1 0 1 1 0 8 0 semapl 112 23 0 13 1 0 1 1 0 8 0 shmpl 112 22 0 3 1 0 1 1 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 3494 0 1999 95 0 95 95 0 8 0 ffsino 256 3494 0 1999 95 0 95 95 0 8 0 nchpl 144 4981 0 3303 63 0 63 63 0 8 0 rtmask 32 8 0 8 2 2 0 1 0 8 0 uvmvnodes 80 4174 0 0 86 0 86 86 0 8 0 vnodes 216 4174 0 0 232 0 232 232 0 8 0 namei 1024 19815 0 19815 5 3 2 2 0 8 2 kstatmem 264 76 0 54 2 0 2 2 0 8 0 scsiplug 72 4 0 4 2 2 0 1 0 8 0 scxspl 216 15194 0 15194 15 14 1 8 1 8 1 plimitpl 152 266 0 250 1 0 1 1 0 8 0 sigapl 424 1295 0 1224 9 0 9 9 0 8 0 knotepl 120 265084 0 265037 32 23 9 15 0 8 6 kqueuepl 184 449 0 438 6 5 1 6 0 8 0 pipepl 304 396 0 369 8 0 8 8 0 8 5 fdescpl 448 1249 0 1219 5 1 4 5 0 8 0 filepl 120 9370 0 9157 20 5 15 15 0 8 6 lockfpl 104 389 0 386 1 0 1 1 0 8 0 lockfspl 48 173 0 170 1 0 1 1 0 8 0 sessionpl 144 26 0 18 1 0 1 1 0 8 0 pgrppl 48 48 0 32 1 0 1 1 0 8 0 ucredpl 104 1971 0 1960 1 0 1 1 0 8 0 zombiepl 144 1603 0 1602 3 2 1 1 0 8 0 processpl 1168 1295 0 1224 6 0 6 6 0 8 0 procpl 664 2723 0 2642 8 0 8 8 0 8 0 sosppl 168 7 0 7 2 2 0 1 0 8 0 sockpl 552 1869 0 1840 20 9 11 13 0 8 7 mcl64k 65536 142 0 142 4 3 1 1 0 8 1 mcl16k 16384 5 0 5 3 2 1 1 0 8 1 mcl12k 12288 1 0 1 1 1 0 1 0 8 0 mcl9k 9216 1 0 1 1 1 0 1 0 8 0 mcl8k 8192 8 0 8 2 2 0 1 0 8 0 mcl4k 4096 3643 0 3590 15 7 8 15 0 8 0 mcl2k 2048 2194 0 2190 10 8 2 9 0 8 1 mtagpl 96 22 0 4 1 0 1 1 0 8 0 mbufpl 256 14277 0 14027 19 2 17 17 0 8 0 bufpl 280 4730 0 186 325 0 325 325 0 8 0 anonpl 24 193853 0 186469 92 22 70 70 0 187 15 amapchunkpl 152 35346 0 34803 51 21 30 37 0 158 4 amappl16 200 3441 0 3230 29 6 23 23 0 8 7 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 150 0 140 1 0 1 1 0 8 0 amappl13 176 31 0 31 1 1 0 1 0 8 0 amappl12 168 1856 0 1828 3 1 2 3 0 8 0 amappl11 160 44 0 34 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 20 0 18 1 0 1 1 0 8 0 amappl7 128 105 0 95 1 0 1 1 0 8 0 amappl6 120 196 0 192 1 0 1 1 0 8 0 amappl5 112 112 0 105 1 0 1 1 0 8 0 amappl4 104 288 0 269 1 0 1 1 0 8 0 amappl3 96 7016 0 6916 4 0 4 4 0 8 0 amappl2 88 666 0 609 2 0 2 2 0 8 0 amappl1 80 12295 0 11749 14 1 13 14 0 8 0 amappl 88 9574 0 9411 6 1 5 5 0 92 0 dma4096 4096 3 0 3 2 2 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 128 253 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 24 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1249 0 1219 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1249 0 1219 1 0 1 1 0 8 0 vmmpekpl 168 11997 0 11969 2 0 2 2 0 8 0 vmmpepl 168 84100 0 82028 109 6 103 103 0 357 8 vmsppl 368 1248 0 1219 4 1 3 4 0 8 0 rwobjpl 40 27424 0 22186 54 0 54 54 0 8 0 pdppl 4096 2505 0 2438 111 42 69 83 0 8 2 pvpl 32 548120 0 535444 190 44 146 146 0 265 20 pmappl 216 1248 0 1219 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 434 0 86 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff80002a8227e0,ffff800033d42ff0,ffff800033d42f40) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a8227e0,ffff800033d42ff0,ffff800033d42f40) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff800033d42ff0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800033d42ff0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4701b8805e0, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff80002a8227e0,ffff800033d42ff0,ffff800033d42f40) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a8227e0,ffff800033d42ff0,ffff800033d42f40) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff800033d42ff0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800033d42ff0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4701b8805e0, count: -3