login: 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(ffff80003c9859c8,ffff80003c98f130,ffff80003c98f080) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80003c9859c8,ffff80003c98f130,ffff80003c98f080) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c98f130) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c98f130) at syscall+0x97e sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x806c5963670, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff80003c98f050 rbx 0 rdx 0xffff80000143c640 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0x22e0d169ef174204 r11 0xab4f5f2208901607 r12 0xfffffd806c3dfe10 r13 0xdeaf4152deaf4152 r14 0xffff800001429000 r15 0xa rip 0xffffffff830935d2 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80003c98efb0 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=461199 pid=29337 tcnt=5 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=78, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c9854a8,0xffff80003c985748 process=0xffff8000ffff7678 user=0xffff80003c98a000, vmspace=0xfffffd806c20c2e8 estcpu=28, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 86935 523792 20914 0 2 0 syz-executor 86935 57621 20914 0 2 0x4000000 syz-executor 12130 438728 9667 0 2 0 syz-executor 12130 110481 9667 0 3 0x4000080 kqread syz-executor 12130 306811 9667 0 3 0x4000000 vmmaplk syz-executor 12130 206055 9667 0 2 0x4000000 syz-executor 65936 173400 79359 0 2 0 syz-executor 65936 254291 79359 0 3 0x4000080 fsleep syz-executor 18806 427113 98675 0 3 0x80 nanoslp syz-executor 18806 84656 98675 0 2 0x4000000 syz-executor 18806 126710 98675 0 3 0x4000080 fsleep syz-executor 70962 267407 33181 0 2 0 syz-executor 70962 482753 33181 0 3 0x4000080 ttyout syz-executor 70962 377125 33181 0 3 0x4000080 fsleep syz-executor 29337 137484 7724 0 2 0 syz-executor *29337 461199 7724 0 7 0x4000000 syz-executor 29337 284225 7724 0 3 0x4000080 fsleep syz-executor 29337 130816 7724 0 2 0x4000000 syz-executor 29337 327570 7724 0 2 0x4000000 syz-executor 76211 344 82315 0 2 0 syz-executor 76211 131923 82315 0 3 0x4000080 fsleep syz-executor 76211 437087 82315 0 2 0x4000000 syz-executor 98675 493851 60733 0 3 0x82 nanoslp syz-executor 73752 416275 0 0 3 0x14200 bored sosplice 79359 405771 60733 0 3 0x82 nanoslp syz-executor 20914 10176 60733 0 3 0x82 nanoslp syz-executor 23870 290773 60733 0 3 0x82 nanoslp syz-executor 33181 519399 60733 0 3 0x82 nanoslp syz-executor 9667 497050 60733 0 3 0x82 nanoslp syz-executor 7724 247460 60733 0 3 0x82 nanoslp syz-executor 82315 209819 60733 0 3 0x82 nanoslp syz-executor 60733 222861 26237 0 3 0x82 kqread syz-executor 26237 80842 1 0 3 0x100082 nanoslp ksh 38337 456586 1 0 3 0x1000008a kqread sshd 82549 19145 66184 73 3 0x1100090 kqread syslogd 66184 309578 1 0 3 0x100082 sbwait syslogd 22102 168201 1 0 3 0x100080 kqread resolvd 9903 417621 43829 77 3 0x100092 kqread dhcpleased 50404 102265 43829 77 3 0x100092 kqread dhcpleased 43829 37851 1 0 3 0x80 kqread dhcpleased 31441 19911 0 0 3 0x14200 bored smr 1230 380635 0 0 2 0x14200 zerothread 94293 271730 0 0 3 0x14200 aiodoned aiodoned 11920 2041 0 0 3 0x14200 syncer update 45396 104925 0 0 3 0x14200 cleaner cleaner 69440 444019 0 0 3 0x14200 reaper reaper 85084 134034 0 0 3 0x14200 pgdaemon pagedaemon 78871 55654 0 0 3 0x14200 bored viomb 46856 475071 0 0 3 0x40014200 acpi0 acpi0 40750 66983 0 0 3 0x14200 bored softnet3 20463 46317 0 0 3 0x14200 bored softnet2 4789 518930 0 0 3 0x14200 bored softnet1 76650 214067 0 0 3 0x14200 bored softnet0 41174 79920 0 0 3 0x14200 bored systqmp 97505 70239 0 0 3 0x14200 bored systq 79573 303008 0 0 3 0x40014200 tmoslp softclock 49056 509657 0 0 3 0x40014200 idle0 1 69124 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 10193 11192K 11304K 166960K 11565 0 pcb 18 13K 14K 166960K 113 0 rtable 203 7K 7K 166960K 406 0 pf 33 13K 17K 166960K 57 0 ifaddr 40 7K 7K 166960K 60 0 ifgroup 49 2K 2K 166960K 80 0 sysctl 3 1K 9K 166960K 7 0 counters 31 17K 18K 166960K 42 0 ioctlops 0 0K 4K 166960K 240 0 iov 0 0K 12K 166960K 17 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1345 85K 85K 166960K 1567 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 23 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 403 0 sigio 1 0K 0K 166960K 8 0 proc 51 50K 100K 166960K 528 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 26 0 in_multi 95 6K 7K 166960K 126 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 406 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 218 138K 160K 166960K 5225 0 UVM aobj 7 2K 2K 166960K 8 0 pinsyscall 33 66K 95K 166960K 1531 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 20 0 NDP 12 0K 2K 166960K 36 0 temp 42 8679K 8743K 166960K 8791 0 kqueue 13 18K 28K 166960K 57 0 SYN cache 2 16K 16K 166960K 2 0 ddb>