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(ffff80002a8419d8,ffff80002a833aa0,ffff80002a8339f0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a8419d8,ffff80002a833aa0,ffff80002a8339f0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80002a833aa0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a833aa0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x25883e01240, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff80002a8339c0 rbx 0 rdx 0xffff800001515980 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0x4e101c745b8d6e20 r11 0x440d0cd969217264 r12 0xfffffd806c3bfe38 r13 0xdeaf4152deaf4152 r14 0xffff8000014a0e00 r15 0xa rip 0xffffffff82e5df82 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002a833920 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=144207 pid=20759 tcnt=5 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=0xffff800039128cf8,0xffff80002a840fa8 process=0xffff800035d14018 user=0xffff80002a82e000, vmspace=0xfffffd806c27b2e0 estcpu=33, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 97323 224665 57242 0 2 0 syz-executor 97323 256809 57242 0 3 0x4000080 fsleep syz-executor 53743 392273 16290 0 2 0 syz-executor 53743 150944 16290 0 3 0x4000080 fsleep syz-executor 53743 365013 16290 0 3 0x4000080 fsleep syz-executor 94488 178476 96896 0 2 0x82000 syz-executor 94488 302852 96896 0 3 0x4002000 suspend syz-executor 94488 408360 96896 0 4 0x4082000 syz-executor 20759 340846 14146 0 2 0 syz-executor *20759 144207 14146 0 7 0x4000000 syz-executor 20759 467831 14146 0 3 0x4000080 fsleep syz-executor 20759 72294 14146 0 2 0x4000000 syz-executor 20759 388718 14146 0 2 0x4000000 syz-executor 61744 163164 96345 0 2 0 syz-executor 61744 522530 96345 0 3 0x4000080 fsleep syz-executor 61744 319535 96345 0 2 0x4000000 syz-executor 61744 227357 96345 0 2 0x4000000 syz-executor 10710 366611 4166 0 3 0x80 nanoslp syz-executor 10710 513666 4166 0 3 0x4000080 fsleep syz-executor 16290 215701 39839 0 3 0x82 nanoslp syz-executor 47888 325735 0 0 3 0x14280 nfsidl nfsio 30528 489297 0 0 3 0x14280 nfsidl nfsio 52370 479111 0 0 3 0x14280 nfsidl nfsio 77552 201586 0 0 3 0x14280 nfsidl nfsio 98410 395067 0 0 3 0x14280 nfsidl nfsio 78748 424006 0 0 3 0x14280 nfsidl nfsio 70452 235390 0 0 3 0x14280 nfsidl nfsio 42149 414159 0 0 3 0x14280 nfsidl nfsio 68305 51670 0 0 3 0x14280 nfsidl nfsio 6751 272492 0 0 3 0x14280 nfsidl nfsio 81932 280127 0 0 3 0x14280 nfsidl nfsio 15545 81527 0 0 3 0x14280 nfsidl nfsio 87157 232595 0 0 3 0x14280 nfsidl nfsio 33866 432194 0 0 3 0x14280 nfsidl nfsio 79439 302485 0 0 3 0x14280 nfsidl nfsio 97197 8935 0 0 3 0x14280 nfsidl nfsio 21724 479882 0 0 3 0x14280 nfsidl nfsio 83418 20006 0 0 3 0x14280 nfsidl nfsio 10986 489990 0 0 3 0x14280 nfsidl nfsio 1300 166917 0 0 3 0x14280 nfsidl nfsio 96896 167706 39839 0 3 0x82 nanoslp syz-executor 4166 299964 39839 0 3 0x82 nanoslp syz-executor 14146 293211 39839 0 3 0x82 nanoslp syz-executor 96345 258371 39839 0 3 0x82 nanoslp syz-executor 89416 3871 0 0 3 0x14200 bored sosplice 57242 281769 39839 0 3 0x82 nanoslp syz-executor 73404 307365 39839 0 2 0x2 syz-executor 39839 329632 73290 0 3 0x82 wait syz-executor 73290 420996 41070 0 3 0x10008a sigsusp ksh 41070 286350 56887 0 3 0x98 kqread sshd-session 56887 67943 3818 0 3 0x92 kqread sshd-session 54177 170793 1 0 3 0x100083 ttyopn getty 3818 511655 1 0 3 0x88 kqread sshd 81618 189609 18574 73 3 0x1100090 kqread syslogd 18574 40675 1 0 3 0x100082 sbwait syslogd 66492 130874 1 0 3 0x100080 kqread resolvd 90631 129268 95293 77 3 0x100092 kqread dhcpleased 74979 522471 95293 77 3 0x100092 kqread dhcpleased 95293 73651 1 0 3 0x80 kqread dhcpleased 2611 10409 0 0 3 0x14200 bored smr 39873 405309 0 0 2 0x14200 zerothread 14426 65529 0 0 3 0x14200 aiodoned aiodoned 48619 375210 0 0 3 0x14200 syncer update 33408 236708 0 0 3 0x14200 cleaner cleaner 41718 284229 0 0 3 0x14200 reaper reaper 69138 505533 0 0 3 0x14200 pgdaemon pagedaemon 15541 418239 0 0 3 0x14200 bored viomb 32003 466227 0 0 3 0x40014200 acpi0 acpi0 37303 105510 0 0 3 0x14200 bored softnet3 73748 111607 0 0 3 0x14200 bored softnet2 10538 224548 0 0 3 0x14200 bored softnet1 74685 458308 0 0 3 0x14200 bored softnet0 34619 419537 0 0 3 0x14200 bored systqmp 83189 163921 0 0 3 0x14200 bored systq 95762 203805 0 0 3 0x40014200 tmoslp softclock 89114 295733 0 0 3 0x40014200 idle0 1 136209 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 10197 11100K 11522K 166960K 13886 0 pcb 20 18K 19K 166960K 370 0 rtable 221 13K 14K 166960K 1075 0 pf 36 14K 21K 166960K 197 0 ifaddr 39 6K 7K 166960K 165 0 ifgroup 54 2K 2K 166960K 214 0 sysctl 4 1K 9K 166960K 13 0 counters 33 17K 18K 166960K 95 0 ioctlops 0 0K 4K 166960K 371 0 iov 0 0K 16K 166960K 65 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1464 92K 93K 166960K 2862 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 26 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 140 0 dirhash 12 2K 2K 166960K 48 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 97K 166960K 1670 0 sigio 0 0K 0K 166960K 26 0 proc 60 59K 124K 166960K 1193 0 subproc 72 4K 4K 166960K 252 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 118 0 in_multi 85 6K 7K 166960K 356 0 ether_multi 1 0K 0K 166960K 14 0 mrt 2 0K 0K 166960K 11 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 2K 166960K 860 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 229 151K 171K 166960K 15626 0 UVM aobj 131 4K 4K 166960K 138 0 pinsyscall 37 74K 96K 166960K 3222 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 85 0 NDP 14 0K 1K 166960K 118 0 temp 68 8686K 8753K 166960K 74388 0 kqueue 14 22K 30K 166960K 239 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 120 219 0 216 3 2 1 3 0 8 0 rtentry 136 354 0 266 4 0 4 4 0 8 0 unpcb 144 1027 0 1012 9 7 2 6 0 8 1 syncache 336 8 0 8 3 2 1 1 0 8 1 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 466 0 461 16 9 7 7 0 8 6 arp 88 61 0 44 1 0 1 1 0 8 0 ipq 40 5 0 4 1 0 1 1 0 8 0 ipqe 40 10 0 9 1 0 1 1 0 8 0 inpcb 328 1553 0 1540 18 8 10 12 0 8 8 ip6q 72 9 0 5 1 0 1 1 0 8 0 ip6af 40 16 0 12 1 0 1 1 0 8 0 nd6 104 89 0 67 1 0 1 1 0 8 0 pkpcb 40 50 0 50 3 2 1 1 0 8 1 kcovpl 48 28 0 20 1 0 1 1 0 8 0 ppxss 1072 35 0 35 3 2 1 1 0 8 1 pppxif 1384 1 0 1 1 0 1 1 0 8 1 pfstscr 40 1 0 1 1 0 1 1 0 8 1 pfosfp 40 4 0 1 1 0 1 1 0 8 0 pfosfpen 112 4 0 1 1 0 1 1 0 8 0 pfrktable 1344 8 0 4 1 0 1 1 0 8 0 pfanchor 1288 4 0 0 1 0 1 1 0 8 0 pftag 88 5 0 2 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 9 0 7 2 1 1 1 0 8 0 pfstate 384 5 0 4 2 1 1 1 0 8 0 pfrule 1344 23 0 17 1 0 1 1 0 8 0 rttmr 136 2 0 2 2 2 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 1531 0 1144 35 8 27 27 0 8 2 art_table 32 1534 0 1144 4 0 4 4 0 8 0 art_node 16 352 0 273 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 13 1 0 1 1 0 8 0 semapl 112 136 0 126 1 0 1 1 0 8 0 shmpl 112 135 0 7 4 0 4 4 0 8 0 dirhash 1024 42 0 25 3 0 3 3 0 8 0 dino2pl 256 3992 0 2458 97 0 97 97 0 8 0 ffsino 248 3992 0 2458 97 0 97 97 0 8 0 nchpl 144 5969 0 4226 65 0 65 65 0 8 0 rtmask 32 10 0 10 2 1 1 1 0 8 1 uvmvnodes 80 5067 0 0 104 0 104 104 0 8 0 vnodes 216 5067 0 0 282 0 282 282 0 8 0 namei 1024 22447 0 22446 3 2 1 2 0 8 0 pfiaddrpl 120 2 0 0 1 0 1 1 0 8 0 kstatmem 264 124 0 100 2 0 2 2 0 8 0 scsiplug 72 7 0 7 2 1 1 1 0 8 1 scxspl 216 33156 0 33156 11 8 3 8 1 8 3 plimitpl 152 655 0 637 1 0 1 1 0 8 0 sigapl 424 1934 0 1869 9 1 8 8 0 8 0 knotepl 120 389032 0 388984 32 22 10 16 0 8 8 kqueuepl 184 581 0 571 9 5 4 6 0 8 3 pipepl 296 283 0 256 5 2 3 5 0 8 0 fdescpl 440 1892 0 1864 5 1 4 5 0 8 0 filepl 120 11821 0 11600 20 7 13 13 0 8 3 lockfpl 104 824 0 822 3 1 2 2 0 8 1 lockfspl 48 311 0 309 1 0 1 1 0 8 0 sessionpl 144 45 0 37 1 0 1 1 0 8 0 pgrppl 48 89 0 73 1 0 1 1 0 8 0 ucredpl 104 1471 0 1460 1 0 1 1 0 8 0 zombiepl 144 2196 0 2195 1 0 1 1 0 8 0 processpl 1160 1934 0 1869 5 0 5 5 0 8 0 procpl 656 3983 0 3905 9 1 8 8 0 8 1 sosppl 168 7 0 7 2 2 0 1 0 8 0 sockpl 528 2939 0 2908 23 12 11 12 0 8 8 mcl64k 65536 91 0 91 3 2 1 1 0 8 1 mcl16k 16384 1 0 1 1 1 0 1 0 8 0 mcl9k 9216 3 0 3 3 2 1 1 0 8 1 mcl8k 8192 17 0 17 3 2 1 1 0 8 1 mcl4k 4096 4126 0 4075 17 9 8 15 0 8 0 mcl2k 2048 2497 0 2490 5 1 4 4 0 8 2 mtagpl 96 174 0 163 4 2 2 4 0 8 0 mbufpl 256 18412 0 18248 24 8 16 24 0 8 1 bufpl 280 12678 0 6451 446 0 446 446 0 8 0 anonpl 24 273494 0 264473 110 20 90 101 0 187 9 amapchunkpl 152 52539 0 51971 54 18 36 39 0 158 11 amappl16 200 5601 0 5313 42 14 28 39 0 8 0 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 147 0 137 1 0 1 1 0 8 0 amappl13 176 6 0 6 1 1 0 1 0 8 0 amappl12 168 2810 0 2782 3 1 2 3 0 8 0 amappl11 160 42 0 32 1 0 1 1 0 8 0 amappl10 152 8 0 8 1 1 0 1 0 8 0 amappl9 144 252 0 252 1 1 0 1 0 8 0 amappl8 136 24 0 22 1 0 1 1 0 8 0 amappl7 128 176 0 166 1 0 1 1 0 8 0 amappl6 120 371 0 368 1 0 1 1 0 8 0 amappl5 112 192 0 185 1 0 1 1 0 8 0 amappl4 104 356 0 338 1 0 1 1 0 8 0 amappl3 96 10256 0 10153 6 2 4 4 0 8 1 amappl2 88 928 0 867 2 0 2 2 0 8 0 amappl1 80 16208 0 15668 13 0 13 13 0 8 0 amappl 88 14396 0 14230 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 1 0 0 1 0 1 1 0 8 0 dma256 256 7 0 7 1 1 0 1 0 8 0 dma128 128 258 0 258 3 2 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 137 0 7 3 0 3 3 0 8 0 uaddrrnd 24 1892 0 1864 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1892 0 1864 1 0 1 1 0 8 0 vmmpekpl 168 15479 0 15431 3 0 3 3 0 8 0 vmmpepl 168 128324 0 126227 120 7 113 116 0 357 4 vmsppl 360 1891 0 1864 4 1 3 4 0 8 0 rwobjpl 32 38483 0 32170 53 0 53 53 0 8 0 pdppl 4096 3791 0 3728 137 68 69 83 0 8 6 pvpl 32 781320 0 766082 192 28 164 183 0 265 6 pmappl 216 1891 0 1864 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 354 0 115 7 0 7 7 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff80002a8419d8,ffff80002a833aa0,ffff80002a8339f0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a8419d8,ffff80002a833aa0,ffff80002a8339f0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80002a833aa0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a833aa0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x25883e01240, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff80002a8419d8,ffff80002a833aa0,ffff80002a8339f0) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a8419d8,ffff80002a833aa0,ffff80002a8339f0) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80002a833aa0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a833aa0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x25883e01240, count: -3