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(ffff80002a7c3208,ffff800038129b00,ffff800038129a50) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7c3208,ffff800038129b00,ffff800038129a50) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff800038129b00) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800038129b00) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe1edad62e40, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff800038129a20 rbx 0 rdx 0xffff80000146c240 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0x19874c3de123e6eb r11 0x57e3a9db61f3800b r12 0xfffffd8063270f50 r13 0xdeadbeefdeadbeef r14 0xffff80000148ff00 r15 0xa rip 0xffffffff822d3d42 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800038129980 ss 0 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=313834 pid=73661 tcnt=5 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=0xffff80002a7c2ce8,0xffff80003a53c550 process=0xffff8000339168e0 user=0xffff800038124000, vmspace=0xfffffd806ccf22e8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 98848 390010 8086 0 2 0 syz-executor 98848 405415 8086 0 3 0x4000080 fsleep syz-executor 44232 359963 12368 0 2 0 syz-executor 44232 500309 12368 0 3 0x4000080 bell syz-executor 44232 447116 12368 0 3 0x4000080 fsleep syz-executor 44232 365984 12368 0 2 0x4000000 syz-executor 28570 192807 11838 0 2 0 syz-executor 28570 137320 11838 0 2 0x4000000 syz-executor 57411 175971 44002 0 2 0xc80 syz-executor 57411 145207 44002 0 3 0x4000080 fsleep syz-executor 57411 70906 44002 0 3 0x4000080 fsleep syz-executor 73661 29483 96157 0 2 0 syz-executor *73661 313834 96157 0 7 0x4000000 syz-executor 73661 71444 96157 0 3 0x4000080 fsleep syz-executor 73661 187014 96157 0 3 0x4000080 msgwait syz-executor 73661 30573 96157 0 2 0x4000000 syz-executor 54455 172248 22176 0 3 0x80 nanoslp syz-executor 54455 335657 22176 0 3 0x4000080 kqread syz-executor 54455 507299 22176 0 3 0x4000080 fsleep syz-executor 54455 153668 22176 0 3 0x4000080 fsleep syz-executor 94450 3842 0 0 3 0x14200 bored sosplice 14112 34934 42093 0 2 0xc80 syz-executor 14112 490395 42093 0 3 0x4000080 ttyin syz-executor 75058 85197 50473 0 3 0x3000 suspend syz-executor 75058 215275 50473 0 2 0x4081000 syz-executor 12368 280583 27211 0 3 0x82 nanoslp syz-executor 50473 305820 27211 0 3 0x82 nanoslp syz-executor 11838 319862 27211 0 3 0x82 nanoslp syz-executor 8086 25360 27211 0 2 0xc82 syz-executor 96157 311959 27211 0 2 0xc82 syz-executor 44002 388223 27211 0 3 0x82 nanoslp syz-executor 22176 256639 27211 0 2 0xc82 syz-executor 42093 34796 27211 0 3 0x82 nanoslp syz-executor 27211 136122 66663 0 3 0x82 kqread syz-executor 66663 113327 37878 0 3 0x10008a sigsusp ksh 37878 476931 44615 0 3 0x98 kqread sshd-session 44615 197680 5496 0 3 0x92 kqread sshd-session 65527 135722 1 0 3 0x100083 ttyin getty 5496 39985 1 0 3 0x88 kqread sshd 88202 28690 34434 73 3 0x1100090 kqread syslogd 34434 412400 1 0 3 0x100082 sbwait syslogd 15283 471808 1 0 3 0x100080 kqread resolvd 39765 519477 60452 77 3 0x100092 kqread dhcpleased 10746 471344 60452 77 3 0x100092 kqread dhcpleased 60452 493217 1 0 3 0x80 kqread dhcpleased 55651 158972 0 0 3 0x14200 bored smr 24941 339041 0 0 2 0x14200 zerothread 94390 118925 0 0 3 0x14200 aiodoned aiodoned 82174 172351 0 0 3 0x14200 syncer update 96914 274091 0 0 3 0x14200 cleaner cleaner 60609 516572 0 0 3 0x14200 reaper reaper 73637 118760 0 0 3 0x14200 pgdaemon pagedaemon 11061 457232 0 0 3 0x14200 bored viomb 38286 197863 0 0 3 0x40014200 acpi0 acpi0 32436 264322 0 0 3 0x14200 bored softnet3 23207 232523 0 0 3 0x14200 bored softnet2 69663 98632 0 0 3 0x14200 bored softnet1 50871 148186 0 0 3 0x14200 bored softnet0 94375 294911 0 0 3 0x14200 bored systqmp 51248 239969 0 0 3 0x14200 bored systq 66620 400336 0 0 3 0x40014200 tmoslp softclock 71046 204286 0 0 3 0x40014200 idle0 1 105500 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10182 11170K 11251K 166960K 11332 0 pcb 17 12K 12K 166960K 21 0 rtable 237 6K 6K 166960K 357 0 pf 30 12K 13K 166960K 32 0 ifaddr 42 7K 7K 166960K 45 0 ifgroup 50 2K 2K 166960K 52 0 sysctl 1 1K 9K 166960K 5 0 counters 32 17K 17K 166960K 33 0 ioctlops 0 0K 2K 166960K 33 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1373 86K 86K 166960K 1468 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 3 0K 0K 166960K 3 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 85K 166960K 164 0 proc 58 59K 91K 166960K 476 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 39 0 in_multi 99 7K 7K 166960K 99 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 344 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 241 151K 158K 166960K 2937 0 UVM aobj 5 2K 2K 166960K 5 0 pinsyscall 39 78K 90K 166960K 1186 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 2 0 NDP 23 1K 2K 166960K 28 0 temp 38 8662K 8726K 166960K 3772 0 kqueue 13 20K 22K 166960K 27 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 39 0 35 1 0 1 1 0 8 0 rtentry 136 111 0 1 4 0 4 4 0 8 0 unpcb 144 48 0 31 1 0 1 1 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 21 0 14 1 0 1 1 0 8 0 arp 88 18 0 0 1 0 1 1 0 8 0 inpcb 328 88 0 77 2 0 2 2 0 8 1 nd6 104 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 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 256 453 0 0 29 0 29 29 0 8 0 art_table 40 454 0 0 5 0 5 5 0 8 0 art_node 32 111 0 11 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semapl 112 1 0 0 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1655 0 149 95 0 95 95 0 8 0 ffsino 248 1655 0 149 95 0 95 95 0 8 0 nchpl 144 1882 0 201 63 0 63 63 0 8 0 uvmvnodes 80 1783 0 0 37 0 37 37 0 8 0 vnodes 216 1783 0 0 100 0 100 100 0 8 0 namei 1024 5576 0 5576 3 2 1 2 0 8 1 kstatmem 264 24 0 2 2 0 2 2 0 8 0 scxspl 216 6177 0 6177 3 2 1 3 1 8 1 plimitpl 152 30 0 11 1 0 1 1 0 8 0 sigapl 424 442 0 395 6 0 6 6 0 8 0 knotepl 120 3479 0 3432 2 0 2 2 0 8 0 kqueuepl 184 26 0 15 1 0 1 1 0 8 0 pipepl 296 101 0 73 3 0 3 3 0 8 0 fdescpl 440 425 0 395 4 0 4 4 0 8 0 filepl 120 1663 0 1440 10 0 10 10 0 8 1 lockfpl 104 16 0 14 1 0 1 1 0 8 0 lockfspl 48 9 0 7 1 0 1 1 0 8 0 sessionpl 144 21 0 13 1 0 1 1 0 8 0 pgrppl 48 30 0 14 1 0 1 1 0 8 0 ucredpl 104 279 0 268 1 0 1 1 0 8 0 zombiepl 144 399 0 398 1 0 1 1 0 8 0 processpl 1160 442 0 395 4 0 4 4 0 8 0 procpl 656 494 0 431 6 0 6 6 0 8 0 sosppl 168 2 0 2 1 0 1 1 0 8 1 sockpl 528 175 0 143 3 0 3 3 0 8 0 mcl64k 65536 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 5 0 5 1 1 0 1 0 8 0 mcl4k 4096 2423 0 2372 14 6 8 14 0 8 0 mcl2k 2048 218 0 216 1 0 1 1 0 8 0 mtagpl 96 5 0 4 1 0 1 1 0 8 0 mbufpl 256 4209 0 4058 10 0 10 10 0 8 0 bufpl 280 2465 0 117 168 0 168 168 0 8 0 anonpl 24 97634 0 93613 26 1 25 25 0 187 0 amapchunkpl 152 8507 0 7979 21 0 21 21 0 158 0 amappl16 200 1924 0 1852 6 2 4 5 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 101 0 91 1 0 1 1 0 8 0 amappl13 176 7 0 7 1 1 0 1 0 8 0 amappl12 168 1033 0 1003 2 0 2 2 0 8 0 amappl11 160 45 0 35 1 0 1 1 0 8 0 amappl10 152 2 0 2 1 1 0 1 0 8 0 amappl9 144 243 0 243 1 1 0 1 0 8 0 amappl8 136 22 0 21 1 0 1 1 0 8 0 amappl7 128 99 0 89 1 0 1 1 0 8 0 amappl6 120 171 0 168 1 0 1 1 0 8 0 amappl5 112 115 0 109 1 0 1 1 0 8 0 amappl4 104 285 0 270 1 0 1 1 0 8 0 amappl3 96 1352 0 1232 3 0 3 3 0 8 0 amappl2 88 606 0 552 2 0 2 2 0 8 0 amappl1 80 7905 0 7350 13 1 12 13 0 8 0 amappl 88 2306 0 2130 4 0 4 4 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 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 425 0 395 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 425 0 395 1 0 1 1 0 8 0 vmmpekpl 168 5071 0 5041 2 0 2 2 0 8 0 vmmpepl 168 33521 0 31572 85 0 85 85 0 357 0 vmsppl 360 424 0 395 4 1 3 4 0 8 0 rwobjpl 32 13976 0 11282 22 0 22 22 0 8 0 pdppl 4096 856 0 790 92 24 68 76 0 8 2 pvpl 32 213726 0 204017 79 0 79 79 0 265 0 pmappl 216 424 0 395 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 255 0 36 7 0 7 7 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff80002a7c3208,ffff800038129b00,ffff800038129a50) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7c3208,ffff800038129b00,ffff800038129a50) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff800038129b00) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800038129b00) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe1edad62e40, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff80002a7c3208,ffff800038129b00,ffff800038129a50) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7c3208,ffff800038129b00,ffff800038129a50) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff800038129b00) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800038129b00) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe1edad62e40, count: -3