panic: kernel diagnostic assertion "nlevel >= IPL_NONE" failed: file "/syzkaller/managers/setuid/kernel/sys/arch/amd64/amd64/intr.c", line 699 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 421588 47361 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827a57c9) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff828214f5,ffffffff8283f7c6,2bb,ffffffff827a5364) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(a48f41ec) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f0fc948) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f0fc948) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff800021224d68,fffffd806f0fc948,fffffd806f0fc9d0,4,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021224d68,4) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021224d68) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021224d68,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021224d68,ffff80002afc3b10,ffff80002afc3b60) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002afc3be0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002afc3be0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7997f9fc12d0, count: 2 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: kernel diagnostic assertion "nlevel >= IPL_NONE" failed: file "/syzkaller/managers/setuid/kernel/sys/arch/amd64/amd64/intr.c", line 699 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827a57c9) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff828214f5,ffffffff8283f7c6,2bb,ffffffff827a5364) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(a48f41ec) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f0fc948) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f0fc948) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff800021224d68,fffffd806f0fc948,fffffd806f0fc9d0,4,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021224d68,4) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021224d68) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021224d68,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021224d68,ffff80002afc3b10,ffff80002afc3b60) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002afc3be0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002afc3be0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7997f9fc12d0, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002afc3750 rbx 0xffffffff82c3ab9f cpu_info_full_primary+0x2b9f rdx 0 rcx 0xffff800021224d68 rax 0xffffffff82c39ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xf2b918b532cc8a0e r11 0xec5ee397e8c4ca6e r12 0xffffffff82c3a9a0 cpu_info_full_primary+0x29a0 r13 0 r14 0 r15 0x1 rip 0xffffffff814d940c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002afc3740 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.2) pid=507161 stat=onproc flags process=1018 proc=2000 pri=0, usrpri=76, nice=20 forw=0xffffffffffffffff, list=0xffff8000212a62b0,0xffffffff82d74a28 process=0xffff800021213ab0 user=0xffff80002afbe000, vmspace=0xfffffd8077c221f0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 69561 13908 43398 32767 2 0x10 syz-executor.3 69561 132243 43398 32767 2 0x4000090 syz-executor.3 68429 365128 26725 32767 2 0x490 syz-executor.1 68429 148665 26725 32767 3 0x4000090 fsleep syz-executor.1 68429 381283 26725 32767 3 0x4000090 fsleep syz-executor.1 21650 130240 19096 32767 2 0x10 syz-executor.7 19096 310641 84069 0 3 0x82 wait syz-executor.7 20096 290184 58931 32767 2 0x490 syz-executor.2 58931 522154 84069 0 3 0x82 wait syz-executor.2 43398 185766 49952 32767 2 0x490 syz-executor.3 49952 393688 84069 0 3 0x82 wait syz-executor.3 26725 293012 19882 32767 2 0x490 syz-executor.1 19882 172811 84069 0 3 0x82 wait syz-executor.1 686 101213 85009 32767 2 0x490 syz-executor.4 85009 478489 84069 0 3 0x82 wait syz-executor.4 63929 436658 43148 32767 2 0x10 syz-executor.5 43148 91120 84069 0 3 0x82 wait syz-executor.5 14905 218356 95785 32767 2 0x490 syz-executor.6 95785 479908 84069 0 3 0x82 wait syz-executor.6 52486 217226 82240 32767 2 0x490 syz-executor.0 82240 55315 84069 0 3 0x82 wait syz-executor.0 18601 392310 0 0 3 0x14200 bored sosplice 84069 491072 66298 0 3 0x2000082 wait syz-fuzzer 84069 230171 66298 0 2 0x6000482 syz-fuzzer 84069 123137 66298 0 3 0x6000082 wait syz-fuzzer 84069 180916 66298 0 3 0x6000082 wait syz-fuzzer 84069 4221 66298 0 3 0x6000082 kqread syz-fuzzer 84069 446277 66298 0 3 0x6000082 thrsleep syz-fuzzer 84069 251863 66298 0 3 0x6000082 wait syz-fuzzer 84069 246432 66298 0 3 0x6000082 thrsleep syz-fuzzer 84069 136458 66298 0 3 0x6000082 thrsleep syz-fuzzer 84069 179231 66298 0 3 0x6000082 wait syz-fuzzer 84069 485009 66298 0 3 0x6000082 thrsleep syz-fuzzer 84069 302104 66298 0 3 0x6000082 wait syz-fuzzer 84069 181373 66298 0 3 0x6000082 wait syz-fuzzer 84069 35 66298 0 3 0x6000082 wait syz-fuzzer 84069 166847 66298 0 3 0x6000082 thrsleep syz-fuzzer 84069 418000 66298 0 3 0x6000082 thrsleep syz-fuzzer 66298 30084 65343 0 3 0x10008a sigsusp ksh 65343 456689 94571 0 3 0x9a kqread sshd 47752 62301 1 0 3 0x100083 ttyin getty 94571 471057 1 0 3 0x88 kqread sshd 42350 98937 17001 73 3 0x1100090 kqread syslogd 17001 161239 1 0 3 0x100082 netio syslogd 16637 62296 1 0 3 0x100080 kqread resolvd 76050 164638 14108 77 3 0x100092 kqread dhcpleased 9387 516747 14108 77 3 0x100092 kqread dhcpleased 14108 72451 1 0 3 0x80 kqread dhcpleased 30476 440191 0 0 3 0x14200 bored smr 22590 150236 0 0 2 0x14200 zerothread 26804 373465 0 0 3 0x14200 aiodoned aiodoned 8479 243462 0 0 3 0x14200 syncer update 49323 325358 0 0 3 0x14200 cleaner cleaner 47361 421588 0 0 7 0x14200 reaper 49830 432994 0 0 3 0x14200 pgdaemon pagedaemon 61161 355310 0 0 3 0x14200 bored viomb 90772 154655 0 0 3 0x40014200 acpi0 acpi0 67545 474546 0 0 3 0x40014200 idle1 65447 254281 0 0 3 0x14200 bored softnet3 94106 506798 0 0 3 0x14200 bored softnet2 2647 378804 0 0 3 0x14200 bored softnet1 18950 474483 0 0 3 0x14200 bored softnet0 47277 47804 0 0 3 0x14200 bored systqmp 18406 107899 0 0 3 0x14200 bored systq 62808 432397 0 0 2 0x40014200 softclock 14510 51224 0 0 3 0x40014200 idle0 1 191723 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 21650 (syz-executor.7) thread 0xffff800021239298 (130240) exclusive rrwlock inode r = 0 (0xfffffd80773f2e78) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x46 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1343 #6 ffs_inode_alloc+0x1c2 sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf8 sys/ufs/ufs/ufs_vnops.c:1149 #8 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #9 domkdirat+0x125 sys/kern/vfs_syscalls.c:3073 #10 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #10 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80773f20a8) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x79 sys/kern/vfs_syscalls.c:3058 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #9 Xsyscall+0x128 Process 63929 (syz-executor.5) thread 0xffff800021206ab8 (436658) exclusive rrwlock inode r = 0 (0xfffffd80773f2c58) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x46 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1343 #6 ffs_inode_alloc+0x1c2 sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf8 sys/ufs/ufs/ufs_vnops.c:1149 #8 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #9 domkdirat+0x125 sys/kern/vfs_syscalls.c:3073 #10 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #10 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8065faba28) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x79 sys/kern/vfs_syscalls.c:3058 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10221 6413K 6420K 78643K 11427 0 pcb 13 16K 20K 78643K 19 0 rtable 242 6K 7K 78643K 2305 0 pf 29 8K 8K 78643K 113 0 ifaddr 44 15K 16K 78643K 218 0 ifgroup 50 2K 2K 78643K 218 0 sysctl 3 1K 1K 78643K 3 0 counters 60 35K 35K 78643K 144 0 ioctlops 0 0K 2K 78643K 257 0 iov 0 0K 24K 78643K 2360 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1279 80K 80K 78643K 5620 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 322 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 2971 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 21 77K 129K 78643K 27467 0 sigio 0 0K 0K 78643K 430 0 proc 56 78K 115K 78643K 2949 0 subproc 104 6K 6K 78643K 650 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 968 0 in_multi 99 7K 7K 78643K 760 0 ether_multi 1 0K 0K 78643K 17 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 265 1182K 1182K 78643K 265 0 exec 0 0K 1K 78643K 3625 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 495 96K 110K 78643K 265319 0 UVM aobj 131 4K 6K 78643K 145 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 562 0 NDP 11 0K 2K 78643K 153 0 temp 74 5920K 6048K 78643K 68213 0 kqueue 13 20K 32K 78643K 2317 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> 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 1330 0 1327 19 18 1 4 0 8 0 rtentry 112 620 0 506 4 0 4 4 0 8 0 unpcb 144 13647 0 13634 152 151 1 8 0 8 0 syncache 304 344 0 344 47 46 1 1 0 8 1 tcpqe 32 398 0 398 42 41 1 1 0 8 1 tcpcb 808 9363 0 9305 180 167 13 17 0 8 6 arp 120 106 0 88 1 0 1 1 0 8 0 ipq 40 52 0 52 14 14 0 1 0 8 0 ipqe 40 336 0 336 14 14 0 1 0 8 0 inpcb 368 34271 0 34207 318 306 12 23 0 8 5 nd6 136 193 0 165 2 0 2 2 0 8 0 kcovpl 48 50 0 42 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2459 0 1988 35 5 30 33 0 8 0 art_table 32 2460 0 1988 5 1 4 5 0 8 0 art_node 16 619 0 515 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 2935 0 2925 1 0 1 1 0 8 0 shmpl 112 142 0 14 5 1 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 37626 0 36123 95 0 95 95 0 8 0 ffsino 272 37626 0 36123 101 0 101 101 0 8 0 nchpl 144 73845 0 72198 63 0 63 63 0 8 0 uvmvnodes 80 6175 0 0 127 0 127 127 0 8 0 vnodes 216 6175 0 0 344 0 344 344 0 8 0 namei 1024 232571 0 232569 6 5 1 2 0 8 0 percpumem 16 85 0 42 1 0 1 1 0 8 0 kstatmem 264 106 0 84 2 0 2 2 0 8 0 scxspl 216 243020 0 243020 88 85 3 8 1 8 3 plimitpl 152 4379 0 4356 39 38 1 2 0 8 0 sigapl 424 27666 0 27613 7 0 7 7 0 8 0 futexpl 64 195581 0 195579 9 8 1 1 0 8 0 knotepl 120 1407 0 0 11 1 10 11 0 8 0 kqueuepl 216 5935 0 5926 110 109 1 10 0 8 0 pipepl 320 6774 0 6742 169 161 8 13 0 8 5 fdescpl 496 27648 0 27616 7 2 5 6 0 8 0 filepl 152 166161 0 165916 296 281 15 21 0 8 5 lockfpl 104 3336 0 3334 3 2 1 2 0 8 0 lockfspl 48 963 0 961 1 0 1 1 0 8 0 sessionpl 144 65 0 49 1 0 1 1 0 8 0 pgrppl 48 231 0 215 1 0 1 1 0 8 0 ucredpl 104 21687 0 21669 1 0 1 1 0 8 0 zombiepl 144 27617 0 27613 1 0 1 1 0 8 0 processpl 1072 27666 0 27613 5 1 4 5 0 8 0 procpl 680 73794 0 73722 55 47 8 9 0 8 1 sosppl 168 417 0 405 23 22 1 1 0 8 0 sockpl 488 53493 0 53411 700 681 19 37 0 8 6 mcl64k 65536 42 0 0 5 2 3 3 0 8 0 mcl16k 16384 86 0 0 9 5 4 9 0 8 0 mcl12k 12288 35 0 0 3 1 2 2 0 8 0 mcl9k 9216 24 0 0 2 0 2 2 0 8 0 mcl8k 8192 50 0 0 5 2 3 3 0 8 0 mcl4k 4096 114 0 0 5 2 3 4 0 8 0 mcl2k2 2112 17 0 0 2 0 2 2 0 8 0 mcl2k 2048 589 0 0 33 18 15 33 0 8 0 mtagpl 96 15 0 0 1 0 1 1 0 8 0 mbufpl 256 2159 0 0 62 0 62 62 0 8 0 bufpl 288 54750 0 48424 453 0 453 453 0 8 0 anonpl 24 2584374 0 2572811 228 132 96 129 0 186 0 amapchunkpl 152 844902 0 844013 232 191 41 61 0 158 1 amappl16 200 50418 0 50159 352 330 22 40 0 8 7 amappl15 192 29 0 29 1 1 0 1 0 8 0 amappl14 184 282 0 269 2 1 1 2 0 8 0 amappl13 176 17 0 17 3 3 0 1 0 8 0 amappl12 168 28963 0 28923 2 0 2 2 0 8 0 amappl11 160 82 0 72 1 0 1 1 0 8 0 amappl10 152 115 0 100 1 0 1 1 0 8 0 amappl9 144 407 0 404 1 0 1 1 0 8 0 amappl8 136 1537 0 1297 10 1 9 9 0 8 0 amappl7 128 201 0 187 2 0 2 2 0 8 0 amappl6 120 728 0 704 1 0 1 1 0 8 0 amappl5 112 854 0 846 1 0 1 1 0 8 0 amappl4 104 1388 0 1346 2 0 2 2 0 8 0 amappl3 96 164978 0 164885 59 55 4 5 0 8 1 amappl2 88 29053 0 28973 3 1 2 3 0 8 0 amappl1 80 105049 0 104522 22 9 13 22 0 8 0 amappl 88 263546 0 263282 10 2 8 8 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 72 144 0 14 3 0 3 3 0 8 0 uaddrrnd 24 27648 0 27616 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 27648 0 27616 1 0 1 1 0 8 0 vmmpekpl 168 208566 0 208508 5 1 4 4 0 8 0 vmmpepl 168 1583189 0 1580771 409 275 134 161 0 357 7 vmsppl 464 27647 0 27616 7 2 5 6 0 8 0 rwobjpl 56 377685 0 369898 131 17 114 114 0 8 0 pdppl 4096 55303 0 55232 892 811 81 97 0 8 10 pvpl 32 7859273 0 7841444 789 602 187 333 0 265 10 pmappl 248 27647 0 27616 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2261 0 1372 26 0 26 26 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827a57c9) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff828214f5,ffffffff8283f7c6,2bb,ffffffff827a5364) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(a48f41ec) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f0fc948) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f0fc948) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff800021224d68,fffffd806f0fc948,fffffd806f0fc9d0,4,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021224d68,4) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021224d68) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021224d68,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021224d68,ffff80002afc3b10,ffff80002afc3b60) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002afc3be0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002afc3be0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7997f9fc12d0, count: -13 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1e 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+0x27 __mp_lock(ffffffff82c85668) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c85668) at __mp_lock+0x122 sys/kern/kern_lock.c:147 reaper(ffff8000211b2d50) at reaper+0x160 sys/kern/kern_exit.c:454 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1e 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+0x27 __mp_lock(ffffffff82c85668) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c85668) at __mp_lock+0x122 sys/kern/kern_lock.c:147 reaper(ffff8000211b2d50) at reaper+0x160 sys/kern/kern_exit.c:454 end trace frame: 0x0, count: -5