uvm_fault(0xffffffff82d76058, 0x0, 0, 2) -> e kernel: page fault trap, code=2 Stopped at km_free+0x128: movq $0,0(%rax) TID PID UID PRFLAGS PFLAGS CPU COMMAND 319379 96775 0 0x8000000 0x4000000 1 syz-executor.5 *508793 7147 0 0x14000 0x200 0 systqmp km_free(0,1000,ffffffff82bd7dc0,ffffffff82bd7dd8) at km_free+0x128 sys/uvm/uvm_km.c:870 pool_p_free(ffffffff82e95b20,fffffd8068db5f90) at pool_p_free+0x14d sys/kern/subr_pool.c:1012 pool_gc_pages(0) at pool_gc_pages+0x255 sys/kern/subr_pool.c:1583 taskq_thread(ffffffff82d48d20) at taskq_thread+0xf5 sys/kern/kern_task.c:448 end trace frame: 0x0, count: 11 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: uvm_fault(0xffffffff82d76058, 0x0, 0, 2) -> e ddb{0}> trace km_free(0,1000,ffffffff82bd7dc0,ffffffff82bd7dd8) at km_free+0x128 sys/uvm/uvm_km.c:870 pool_p_free(ffffffff82e95b20,fffffd8068db5f90) at pool_p_free+0x14d sys/kern/subr_pool.c:1012 pool_gc_pages(0) at pool_gc_pages+0x255 sys/kern/subr_pool.c:1583 taskq_thread(ffffffff82d48d20) at taskq_thread+0xf5 sys/kern/kern_task.c:448 end trace frame: 0x0, count: -4 ddb{0}> show registers rdi 0x1000 __ALIGN_SIZE rsi 0x28000000 rbp 0xffff80002a11d6a0 rbx 0xffffffff82bd7dc0 kv_page rdx 0 rcx 0xffff8000ffffe7b0 rax 0 r8 0 r9 0x1 r10 0x85c2b3734b98bbf7 r11 0x3e046d9a3e6626e3 r12 0x1000 __ALIGN_SIZE r13 0 r14 0x1000 __ALIGN_SIZE r15 0x28000000000 rip 0xffffffff821c2a08 km_free+0x128 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a11d630 ss 0x10 km_free+0x128: movq $0,0(%rax) ddb{0}> show proc PROC (systqmp) tid=508793 pid=7147 tcnt=1 stat=onproc flags process=14000 proc=200 runpri=32, usrpri=51, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffef60,0xffff8000ffffe010 process=0xffff80002a0fc478 user=0xffff80002a118000, vmspace=0xffffffff82d76058 estcpu=1, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 38808 405307 64015 0 2 0x8000002 ndp 64015 345331 23977 0 3 0x810008a sigsusp sh 81112 279196 29678 0 2 0x8000000 syz-executor.3 81112 172752 29678 0 3 0xc000080 fsleep syz-executor.3 34199 332201 12149 0 2 0x8000000 syz-executor.6 34199 117889 12149 0 3 0xc000080 fsleep syz-executor.6 96775 37547 2417 0 2 0x8000000 syz-executor.5 96775 319379 2417 0 7 0xc000000 syz-executor.5 96775 511749 2417 0 2 0xc000000 syz-executor.5 48000 157104 20951 60928 2 0x8000010 syz-executor.2 48000 58361 20951 60928 3 0xc000090 fsleep syz-executor.2 48000 25319 20951 60928 3 0xc000090 fsleep syz-executor.2 23977 462946 93627 0 3 0x8000082 wait syz-executor.7 20951 449290 93627 0 2 0x8000482 syz-executor.2 30005 24686 93627 0 3 0x8000082 nanoslp syz-executor.4 58316 418939 93627 0 3 0x8000082 nanoslp syz-executor.0 12149 511881 93627 0 2 0x8000482 syz-executor.6 3432 48197 1 0 3 0x18100083 ttyin getty 29678 212696 93627 0 3 0x8000082 nanoslp syz-executor.3 6015 388347 0 0 3 0x14200 bored sosplice 56903 432903 93627 0 3 0x8000002 biowait syz-executor.1 2417 3668 93627 0 2 0x8000482 syz-executor.5 93627 200038 5425 0 3 0x1a000082 thrsleep syz-fuzzer 93627 11785 5425 0 3 0x1e000082 nanoslp syz-fuzzer 93627 394976 5425 0 3 0x1e000082 wait syz-fuzzer 93627 53988 5425 0 3 0x1e000082 wait syz-fuzzer 93627 353554 5425 0 2 0x1e000082 syz-fuzzer 93627 469988 5425 0 3 0x1e000082 wait syz-fuzzer 93627 467285 5425 0 3 0x1e000082 wait syz-fuzzer 93627 20629 5425 0 3 0x1e000082 thrsleep syz-fuzzer 93627 205953 5425 0 3 0x1e000082 kqread syz-fuzzer 93627 257756 5425 0 3 0x1e000082 wait syz-fuzzer 93627 296613 5425 0 3 0x1e000082 thrsleep syz-fuzzer 93627 325045 5425 0 3 0x1e000082 wait syz-fuzzer 93627 184961 5425 0 3 0x1e000082 wait syz-fuzzer 93627 384364 5425 0 3 0x1e000082 thrsleep syz-fuzzer 93627 442925 5425 0 3 0x1e000082 thrsleep syz-fuzzer 93627 13603 5425 0 3 0x1e000082 wait syz-fuzzer 5425 273329 57629 0 3 0x810008a sigsusp ksh 57629 136970 71786 0 3 0x1800009a kqread sshd 71786 447245 1 0 3 0x18000088 kqread sshd 33543 38111 25376 73 3 0x19100010 biowait syslogd 25376 190964 1 0 3 0x18100082 sbwait syslogd 25658 119728 1 0 3 0x18100080 kqread resolvd 96430 52626 24293 77 3 0x18100092 kqread dhcpleased 19378 242696 24293 77 3 0x18100092 kqread dhcpleased 24293 121154 1 0 3 0x18000080 kqread dhcpleased 42264 98049 0 0 3 0x14200 bored smr 45269 86842 0 0 2 0x14200 zerothread 73056 58323 0 0 3 0x14200 aiodoned aiodoned 26302 466616 0 0 2 0x14600 update 55376 261187 0 0 3 0x14200 cleaner cleaner 98920 485491 0 0 3 0x14200 reaper reaper 14299 164384 0 0 3 0x14200 pgdaemon pagedaemon 57142 522257 0 0 3 0x14200 bored viomb 43042 452290 0 0 3 0x40014200 acpi0 acpi0 98504 469042 0 0 3 0x40014200 idle1 14448 462270 0 0 3 0x14200 bored softnet3 44176 439880 0 0 3 0x14200 bored softnet2 96182 97055 0 0 3 0x14200 bored softnet1 85287 332556 0 0 3 0x14200 bored softnet0 * 7147 508793 0 0 7 0x14200 systqmp 75916 23477 0 0 3 0x14200 bored systq 97171 261372 0 0 3 0x14200 tmoslp softclockmp 8855 163632 0 0 2 0x40014200 softclock 50206 16407 0 0 3 0x40014200 idle0 1 268876 0 0 3 0x8000082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 96775 (syz-executor.5) thread 0xffff80002a2239c8 (37547) shared rwlock vmmaplk r = 0 (0xfffffd80765fe2b0) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1157 #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1785 #2 uvm_fault_check+0x3e sys/uvm/uvm_fault.c:672 #3 uvm_fault+0xf2 sys/uvm/uvm_fault.c:600 #4 upageflttrap+0x8e sys/arch/amd64/amd64/trap.c:188 #5 usertrap+0x22a sys/arch/amd64/amd64/trap.c:436 #6 recall_trap+0x8 Process 56903 (syz-executor.1) thread 0xffff80002a2102b0 (432903) exclusive rrwlock inode r = 0 (0xfffffd8067284918) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1157 #1 rw_enter+0x32d sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x91 sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:524 #4 vn_lock+0x85 sys/kern/vfs_vnops.c:564 #5 vget+0x1fd sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ufs_lookup+0x1373 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6f8 sys/kern/vfs_lookup.c:566 #11 namei+0x56a sys/kern/vfs_lookup.c:250 #12 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1856 #13 syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] #13 syscall+0x854 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806e348920) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1157 #1 rw_enter+0x32d sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x91 sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:524 #4 vn_lock+0x85 sys/kern/vfs_vnops.c:564 #5 vget+0x1fd sys/kern/vfs_subr.c:676 #6 cache_lookup+0x2b3 sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x1b2 sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x6f8 sys/kern/vfs_lookup.c:566 #10 namei+0x56a sys/kern/vfs_lookup.c:250 #11 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1856 #12 syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] #12 syscall+0x854 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 Process 33543 (syslogd) thread 0xffff8000ffffd720 (38111) exclusive rrwlock inode r = 0 (0xfffffd806e71d2c0) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1157 #1 rw_enter+0x32d sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x91 sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:524 #4 vn_lock+0x85 sys/kern/vfs_vnops.c:564 #5 sys_fsync+0xf1 sys/kern/vfs_syscalls.c:2931 #6 syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] #6 syscall+0x854 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 7147 (systqmp) thread 0xffff8000ffffe7b0 (508793) shared rwlock pools r = 0 (0xffffffff82cc4e10) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1157 #1 pool_gc_pages+0x25 sys/kern/subr_pool.c:1560 #2 taskq_thread+0xf5 sys/kern/kern_task.c:448 #3 proc_trampoline+0x10 shared rwlock systqmp r = 0 (0xffffffff82d48d90) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1157 #1 taskq_thread+0xda sys/kern/kern_task.c:444 #2 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10201 6623K 7004K 166960K 13401 0 pcb 17 12K 12K 166960K 152 0 rtable 199 6K 7K 166960K 797 0 pf 33 9K 10K 166960K 107 0 ifaddr 43 15K 15K 166960K 121 0 ifgroup 58 2K 2K 166960K 169 0 sysctl 4 1K 1K 166960K 4 0 counters 66 36K 37K 166960K 128 0 ioctlops 0 0K 4K 166960K 1533 0 iov 0 0K 16K 166960K 53 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1402 88K 88K 166960K 2324 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 30 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 80 0 dirhash 12 2K 2K 166960K 36 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 16 57K 97K 166960K 1079 0 sigio 0 0K 0K 166960K 19 0 proc 58 79K 115K 166960K 882 0 subproc 104 6K 8K 166960K 260 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 144 0 in_multi 91 6K 7K 166960K 265 0 ether_multi 1 0K 0K 166960K 4 0 mrt 0 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 620 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 268 76K 111K 166960K 11282 0 UVM aobj 50 4K 4K 166960K 55 0 pinsyscall 36 72K 100K 166960K 2549 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 57 0 NDP 14 0K 2K 166960K 84 0 temp 75 6808K 7303K 166960K 45037 0 kqueue 12 18K 28K 166960K 146 0 SYN cache 2 8K 16K 166960K 3 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 137 0 133 1 0 1 1 0 8 0 rtentry 112 271 0 180 4 0 4 4 0 8 0 unpcb 144 671 0 658 2 0 2 2 0 8 1 syncache 336 6 0 6 3 3 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 30 0 30 2 2 0 1 0 8 0 tcpcb 808 362 0 356 11 9 2 8 0 8 1 arp 120 47 0 30 1 0 1 1 0 8 0 inpcb 384 1063 0 1052 12 9 3 9 0 8 1 nd6 136 70 0 49 1 0 1 1 0 8 0 pkpcb 40 10 0 10 4 4 0 1 0 8 0 kcovpl 48 20 0 12 1 0 1 1 0 8 0 ppxss 1168 8 0 8 4 4 0 1 0 8 0 pffrag 232 8 0 5 1 0 1 1 0 482 0 pffrnode 88 5 0 2 1 0 1 1 0 8 0 pffrent 40 16 0 13 2 1 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 95 0 57 1 0 1 1 0 8 0 pfstkey 128 95 0 57 2 0 2 2 0 8 0 pfstate 376 95 0 56 5 0 5 5 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1086 0 656 33 6 27 29 0 8 0 art_table 32 1087 0 656 4 0 4 4 0 8 0 art_node 16 269 0 187 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 78 0 68 1 0 1 1 0 8 0 shmpl 112 52 0 5 2 0 2 2 0 8 0 dirhash 1024 33 0 16 3 0 3 3 0 8 0 dino2pl 256 3060 0 1538 96 0 96 96 0 8 0 ffsino 272 3060 0 1538 103 1 102 103 0 8 0 nchpl 144 4605 0 2860 67 0 67 67 0 8 0 uvmvnodes 80 3857 0 0 79 0 79 79 0 8 0 vnodes 216 3857 0 0 215 0 215 215 0 8 0 namei 1024 16861 0 16861 4 3 1 2 0 8 1 percpumem 16 78 0 31 1 0 1 1 0 8 0 vcpupl 3904 4 0 1 1 0 1 1 0 8 0 vmpool 696 9 0 6 6 5 1 1 0 8 0 kstatmem 264 86 0 62 2 0 2 2 0 8 0 scsiplug 72 2 0 2 2 2 0 1 0 8 0 scxspl 216 28621 0 28619 14 13 1 8 1 8 0 plimitpl 152 185 0 170 1 0 1 1 0 8 0 sigapl 424 1389 0 1341 9 2 7 8 0 8 0 futexpl 64 16851 0 16847 4 3 1 1 0 8 0 knotepl 120 880 0 0 26 0 26 26 0 8 0 kqueuepl 216 370 0 360 5 4 1 5 0 8 0 pipepl 320 269 0 241 3 0 3 3 0 8 0 fdescpl 496 1348 0 1321 7 2 5 5 0 8 0 filepl 152 8306 0 8059 17 5 12 14 0 8 0 lockfpl 104 341 0 339 1 0 1 1 0 8 0 lockfspl 48 152 0 150 1 0 1 1 0 8 0 sessionpl 144 37 0 21 1 0 1 1 0 8 0 pgrppl 48 48 0 32 1 0 1 1 0 8 0 ucredpl 104 1090 0 1077 1 0 1 1 0 8 0 zombiepl 144 1343 0 1341 1 0 1 1 0 8 0 processpl 1144 1389 0 1341 6 1 5 6 0 8 0 procpl 656 2367 0 2298 9 2 7 9 0 8 0 srpgc 96 8 0 8 2 2 0 1 0 8 0 sockpl 664 1888 0 1860 16 12 4 9 0 8 0 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl16k 16384 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 388 0 0 49 0 49 49 0 8 0 mtagpl 96 21 0 0 1 0 1 1 0 8 0 mbufpl 256 417 0 0 27 0 27 27 0 8 0 bufpl 280 8663 0 1703 498 0 498 498 0 8 0 anonpl 24 304694 0 298478 78 10 68 68 0 186 19 amapchunkpl 152 37593 0 36960 59 20 39 45 0 158 8 amappl16 200 6782 0 6654 31 22 9 21 0 8 0 amappl15 192 26 0 26 1 1 0 1 0 8 0 amappl14 184 190 0 178 2 1 1 2 0 8 0 amappl13 176 90 0 89 1 0 1 1 0 8 0 amappl12 168 2190 0 2160 3 1 2 3 0 8 0 amappl11 160 73 0 55 1 0 1 1 0 8 0 amappl10 152 131 0 125 1 0 1 1 0 8 0 amappl9 144 176 0 176 2 2 0 1 0 8 0 amappl8 136 182 0 149 2 0 2 2 0 8 0 amappl7 128 76 0 59 1 0 1 1 0 8 0 amappl6 120 463 0 450 2 1 1 2 0 8 0 amappl5 112 221 0 209 1 0 1 1 0 8 0 amappl4 104 628 0 593 2 0 2 2 0 8 0 amappl3 96 7506 0 7434 3 0 3 3 0 8 0 amappl2 88 1830 0 1757 4 2 2 4 0 8 0 amappl1 80 13323 0 12837 23 11 12 22 0 8 0 amappl 88 10568 0 10390 6 0 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 54 0 5 1 0 1 1 0 8 0 uaddrrnd 24 1358 0 1328 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1358 0 1328 1 0 1 1 0 8 0 vmmpekpl 168 13730 0 13666 4 0 4 4 0 8 0 vmmpepl 168 104313 0 102538 134 37 97 118 0 357 7 vmsppl 440 1357 0 1328 6 1 5 5 0 8 0 rwobjpl 56 34815 0 29836 77 6 71 71 0 8 0 pdppl 4096 2723 0 2659 148 78 70 81 0 8 6 pvpl 32 49998 0 0 405 1 404 404 0 265 0 pmappl 248 1357 0 1328 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 490 0 106 12 0 12 12 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace km_free(0,1000,ffffffff82bd7dc0,ffffffff82bd7dd8) at km_free+0x128 sys/uvm/uvm_km.c:870 pool_p_free(ffffffff82e95b20,fffffd8068db5f90) at pool_p_free+0x14d sys/kern/subr_pool.c:1012 pool_gc_pages(0) at pool_gc_pages+0x255 sys/kern/subr_pool.c:1583 taskq_thread(ffffffff82d48d20) at taskq_thread+0xf5 sys/kern/kern_task.c:448 end trace frame: 0x0, count: -4 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800029cebff0) 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(ffffffff82e5b6b8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82e5b6b8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff80002ab0d930) at syscall+0x83b mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80002ab0d930) at syscall+0x83b sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x88f0cd52b0, count: 9 ddb{1}> trace x86_ipi_db(ffff800029cebff0) 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(ffffffff82e5b6b8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82e5b6b8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff80002ab0d930) at syscall+0x83b mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80002ab0d930) at syscall+0x83b sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x88f0cd52b0, count: -6