kernel: protection fault trap, code=0 Stopped at sys_msgrcv+0x2df: movq 0x10(%r13),%rdi ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace sys_msgrcv(ffff80002475ab20,ffff800027f81388,ffff800027f813d0) at sys_msgrcv+0x2df msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002475ab20,ffff800027f81388,ffff800027f813d0) at sys_msgrcv+0x2df sys/kern/sysv_msg.c:349 syscall(ffff800027f81450) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800027f81450) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcd42374f8f0, count: -3 ddb{1}> show registers rdi 0x106e __ALIGN_SIZE+0x6e rsi 0x20001cc8 rbp 0xffff800027f81370 rbx 0x106e __ALIGN_SIZE+0x6e rdx 0 rcx 0 rax 0xffff80002475ab20 r8 0x7f7fffffc000 r9 0 r10 0x13d73494b14d8831 r11 0x2d479cab9999a1dc r12 0xfffffd806c708ca8 r13 0xdeadbeefdeadbeef r14 0xffff800000d2c600 r15 0x1c0 rip 0xffffffff81e3167f sys_msgrcv+0x2df cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800027f812e0 ss 0x10 sys_msgrcv+0x2df: movq 0x10(%r13),%rdi ddb{1}> show proc PROC (syz-executor.7) pid=234083 stat=onproc flags process=10 proc=4000000 pri=36, usrpri=75, nice=20 forw=0xffffffffffffffff, list=0xffff80002475add8,0xffff80002475b8c8 process=0xffff80002122dd60 user=0xffff800027f7c000, vmspace=0xfffffd8069d301b8 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 72151 457588 25755 32767 2 0x10 syz-executor.3 72151 266685 25755 32767 3 0x4000090 fsleep syz-executor.3 97300 157813 63028 32767 2 0x10 syz-executor.6 97300 309241 63028 32767 3 0x4000090 ttyout syz-executor.6 97300 389178 63028 32767 7 0x4000010 syz-executor.6 43322 133026 30021 32767 3 0x90 nanoslp syz-executor.4 43322 375606 30021 32767 3 0x4000090 ttyout syz-executor.4 43322 145104 30021 32767 3 0x4000090 fsleep syz-executor.4 93322 394812 97882 32767 2 0x10 syz-executor.7 *93322 234083 97882 32767 7 0x4000010 syz-executor.7 93322 282557 97882 32767 3 0x4000090 fsleep syz-executor.7 93322 216173 97882 32767 2 0x4000010 syz-executor.7 31194 10007 0 0 3 0x14200 bored sosplice 30021 294551 72917 32767 3 0x90 nanoslp syz-executor.4 97882 41415 37704 32767 3 0x90 nanoslp syz-executor.7 63028 252343 85783 32767 3 0x90 nanoslp syz-executor.6 37704 56296 7129 0 3 0x82 wait syz-executor.7 78257 416304 89014 32767 3 0x10 biowait syz-executor.2 43589 242050 38906 32767 3 0x10 biowait syz-executor.5 85783 322958 7129 0 3 0x82 wait syz-executor.6 72917 220434 7129 0 3 0x82 wait syz-executor.4 14496 174385 57490 32767 3 0x90 nanoslp syz-executor.1 38906 15800 7129 0 3 0x82 wait syz-executor.5 57490 108881 7129 0 3 0x82 wait syz-executor.1 25755 363863 55695 32767 3 0x90 nanoslp syz-executor.3 89014 2706 7129 0 3 0x82 wait syz-executor.2 67813 6810 51080 32767 3 0x10 biowait syz-executor.0 55695 89279 7129 0 3 0x82 wait syz-executor.3 51080 385715 7129 0 3 0x82 wait syz-executor.0 7129 185995 4173 0 3 0x82 wait syz-fuzzer 7129 161337 4173 0 3 0x4000082 nanoslp syz-fuzzer 7129 316030 4173 0 3 0x4000082 wait syz-fuzzer 7129 472960 4173 0 3 0x4000082 wait syz-fuzzer 7129 331187 4173 0 3 0x4000082 thrsleep syz-fuzzer 7129 446302 4173 0 3 0x4000082 wait syz-fuzzer 7129 129804 4173 0 3 0x4000082 wait syz-fuzzer 7129 481084 4173 0 3 0x4000082 wait syz-fuzzer 7129 493133 4173 0 3 0x4000082 thrsleep syz-fuzzer 7129 511579 4173 0 3 0x4000082 wait syz-fuzzer 7129 313048 4173 0 3 0x4000082 thrsleep syz-fuzzer 7129 299820 4173 0 3 0x4000082 wait syz-fuzzer 7129 103883 4173 0 3 0x4000082 thrsleep syz-fuzzer 7129 121569 4173 0 3 0x4000082 thrsleep syz-fuzzer 7129 10671 4173 0 3 0x4000082 kqread syz-fuzzer 4173 99058 47314 0 3 0x10008a sigsusp ksh 47314 507670 25022 0 3 0x9a kqread sshd 3798 513933 1 0 3 0x100083 ttyin getty 25022 187297 1 0 3 0x88 kqread sshd 63147 238865 5816 73 3 0x1100090 kqread syslogd 5816 821 1 0 3 0x100082 netio syslogd 27332 12520 1 0 3 0x100080 kqread resolvd 58973 390866 14742 77 3 0x100092 kqread dhcpleased 37871 419956 14742 77 3 0x100092 kqread dhcpleased 14742 13423 1 0 3 0x80 kqread dhcpleased 52958 349180 0 0 3 0x14200 bored smr 1576 314279 0 0 2 0x14200 zerothread 79616 495 0 0 3 0x14200 aiodoned aiodoned 51743 419435 0 0 3 0x14200 syncer update 39796 153402 0 0 3 0x14200 cleaner cleaner 33723 334815 0 0 3 0x14200 reaper reaper 54908 402541 0 0 3 0x14200 pgdaemon pagedaemon 81944 271749 0 0 3 0x14200 bored viomb 18237 100198 0 0 3 0x40014200 acpi0 acpi0 48155 393211 0 0 3 0x40014200 idle1 74014 13118 0 0 3 0x14200 bored softnet 42709 59290 0 0 3 0x14200 bored softnet 75419 182292 0 0 3 0x14200 bored softnet 58364 43192 0 0 3 0x14200 bored softnet 45864 287428 0 0 3 0x14200 bored systqmp 23787 45320 0 0 3 0x14200 bored systq 98862 43197 0 0 3 0x40014200 bored softclock 10074 491501 0 0 3 0x40014200 idle0 1 249150 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 93322 (syz-executor.7) thread 0xffff80002475ab20 (234083) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82c2ca98) #0 witness_lock+0x44d #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x3bb sys/kern/sched_bsd.c:405 #3 sleep_finish+0x180 sys/kern/kern_synch.c:417 #4 rw_enter+0x35a sys/kern/kern_rwlock.c:286 #5 uvmfault_lookup+0xc9 sys/uvm/uvm_fault.c:1773 #6 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:673 #7 uvm_fault+0xf2 sys/uvm/uvm_fault.c:601 #8 kpageflttrap+0x22e sys/arch/amd64/amd64/trap.c:284 #9 kerntrap+0xef sys/arch/amd64/amd64/trap.c:339 #10 alltraps_kern_meltdown+0x7b #11 copyout+0x53 #12 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #12 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 #13 Xsyscall+0x128 Process 78257 (syz-executor.2) thread 0xffff8000212e0dc8 (416304) exclusive rrwlock inode r = 0 (0xfffffd807e55ba38) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1353 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1150 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 #10 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #10 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8069402c48) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3097 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 #9 Xsyscall+0x128 Process 43589 (syz-executor.5) thread 0xffff8000212e18a8 (242050) exclusive rrwlock inode r = 0 (0xfffffd807e55bc58) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1353 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1150 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 #10 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #10 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80654bcb40) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3097 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 #9 Xsyscall+0x128 Process 67813 (syz-executor.0) thread 0xffff800021228850 (6810) exclusive rrwlock inode r = 0 (0xfffffd807e55b1b8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1353 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1150 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 #10 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #10 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80694021a8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3097 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10196 6409K 6421K 78643K 11286 0 pcb 13 8K 8K 78643K 13 0 rtable 234 6K 6K 78643K 359 0 ifaddr 73 24K 24K 78643K 75 0 counters 60 35K 35K 78643K 60 0 ioctlops 0 0K 2K 78643K 27 0 iov 0 0K 28K 78643K 74 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1271 79K 79K 78643K 1284 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 5 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 74 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 22 81K 117K 78643K 265 0 sigio 0 0K 0K 78643K 4 0 proc 61 91K 115K 78643K 481 0 subproc 104 6K 6K 78643K 104 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 5 0 in_multi 99 6K 6K 78643K 100 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 438 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 292 79K 79K 78643K 3562 0 UVM aobj 12 2K 2K 78643K 12 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 39 0 NDP 11 0K 2K 78643K 27 0 temp 101 5768K 5832K 78643K 4449 0 kqueue 13 20K 22K 78643K 28 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 40 0 37 1 0 1 1 0 8 0 rtentry 112 111 0 1 4 0 4 4 0 8 0 unpcb 144 70 0 55 1 0 1 1 0 8 0 syncache 296 4 0 4 1 1 0 1 0 8 0 tcpqe 32 285 0 285 2 2 0 1 0 8 0 tcpcb 776 82 0 76 2 0 2 2 0 8 1 arp 120 18 0 0 1 0 1 1 0 8 0 inpcb 368 163 0 152 2 0 2 2 0 8 1 nd6 48 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 452 0 0 29 0 29 29 0 8 0 art_table 32 453 0 0 4 0 4 4 0 8 0 art_node 16 110 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 13 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 71 0 61 1 0 1 1 0 8 0 shmpl 112 9 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1613 0 182 90 0 90 90 0 8 0 ffsino 272 1613 0 182 96 0 96 96 0 8 0 nchpl 144 2030 0 362 63 0 63 63 0 8 0 uvmvnodes 80 1726 0 0 36 0 36 36 0 8 0 vnodes 216 1726 0 0 96 0 96 96 0 8 0 namei 1024 7163 0 7160 2 1 1 2 0 8 0 percpumem 16 43 0 0 1 0 1 1 0 8 0 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 7268 0 7265 9 1 8 8 0 8 7 plimitpl 152 76 0 50 2 0 2 2 0 8 0 sigapl 424 558 0 506 7 0 7 7 0 8 0 futexpl 64 1655 0 1652 1 0 1 1 0 8 0 knotepl 120 110 0 0 4 0 4 4 0 8 0 kqueuepl 216 35 0 26 1 0 1 1 0 8 0 pipepl 320 249 0 221 8 0 8 8 0 8 5 fdescpl 496 540 0 507 7 1 6 6 0 8 0 filepl 152 2561 0 2315 15 0 15 15 0 8 5 lockfpl 104 20 0 18 1 0 1 1 0 8 0 lockfspl 48 11 0 9 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 23 0 7 1 0 1 1 0 8 0 ucredpl 104 132 0 114 1 0 1 1 0 8 0 zombiepl 144 507 0 506 1 0 1 1 0 8 0 processpl 1072 558 0 506 4 0 4 4 0 8 0 procpl 696 857 0 783 10 1 9 9 0 8 1 sosppl 168 6 0 6 1 0 1 1 0 8 1 sockpl 488 275 0 246 5 0 5 5 0 8 1 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 301 0 0 37 0 37 37 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 363 0 0 23 0 23 23 0 8 0 bufpl 288 4154 0 140 287 0 287 287 0 8 0 anonpl 24 147055 0 134568 81 1 80 80 0 186 1 amapchunkpl 152 9906 0 9217 38 0 38 38 0 158 3 amappl16 200 2678 0 2365 22 1 21 21 0 8 0 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 142 0 130 2 1 1 2 0 8 0 amappl13 176 20 0 18 1 0 1 1 0 8 0 amappl12 168 402 0 397 1 0 1 1 0 8 0 amappl11 160 52 0 41 1 0 1 1 0 8 0 amappl10 152 33 0 25 1 0 1 1 0 8 0 amappl9 144 960 0 959 2 1 1 1 0 8 0 amappl8 136 168 0 122 3 0 3 3 0 8 0 amappl7 128 144 0 123 2 0 2 2 0 8 0 amappl6 120 167 0 157 2 1 1 2 0 8 0 amappl5 112 119 0 113 1 0 1 1 0 8 0 amappl4 104 492 0 460 2 0 2 2 0 8 0 amappl3 96 1009 0 948 2 0 2 2 0 8 0 amappl2 88 903 0 827 3 1 2 3 0 8 0 amappl1 80 14594 0 13832 26 6 20 26 0 8 2 amappl 88 3069 0 2875 7 1 6 6 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 11 0 0 1 0 1 1 0 8 0 uaddrrnd 24 540 0 507 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 540 0 507 1 0 1 1 0 8 0 vmmpekpl 168 10721 0 10665 3 0 3 3 0 8 0 vmmpepl 168 58411 0 55780 170 0 170 170 0 357 44 vmsppl 440 539 0 507 5 0 5 5 0 8 0 rwobjpl 56 19251 0 16093 47 1 46 47 0 8 0 pdppl 4096 1087 0 1014 115 34 81 91 0 8 8 pvpl 32 370681 0 352252 364 24 340 362 0 265 184 pmappl 248 539 0 507 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 692 0 37 19 0 19 19 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff82bc1ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 kd_curproc sys/dev/kcov.c:577 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 sys/dev/kcov.c:148 __mp_lock(ffffffff82c2c890) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c2c890) at __mp_lock+0x133 sys/kern/kern_lock.c:147 syscall(ffff800024739420) at syscall+0x5cd mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800024739420) at syscall+0x5cd sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x878156264d0, count: -7 ddb{0}> machine ddbcpu 1 Stopped at sys_msgrcv+0x2df: movq 0x10(%r13),%rdi ddb{1}> trace sys_msgrcv(ffff80002475ab20,ffff800027f81388,ffff800027f813d0) at sys_msgrcv+0x2df msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002475ab20,ffff800027f81388,ffff800027f813d0) at sys_msgrcv+0x2df sys/kern/sysv_msg.c:349 syscall(ffff800027f81450) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800027f81450) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcd42374f8f0, count: -3