uvm_fault(0xfffffd807efff450, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi TID PID UID PRFLAGS PFLAGS CPU COMMAND *453071 55944 32767 0x10 0x4000000 1K syz-executor.1 268651 55944 32767 0x10 0x4000000 0 syz-executor.1 uvm_fault_lower(ffff8000246882e0,ffff800024688318,ffff800024688260,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efff450,20001000,0,1) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 kpageflttrap(ffff800024688470,20001880) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff800024688470) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x53 sys_preadv(ffff800021192008,ffff8000246886e8,ffff800024688740) at sys_preadv+0x5a sys/kern/vfs_syscalls.c:3281 syscall(ffff8000246887b0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246887b0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbd3ff491230, count: 6 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd807efff450, 0x0, 0, 1) -> e ddb{1}> trace uvm_fault_lower(ffff8000246882e0,ffff800024688318,ffff800024688260,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efff450,20001000,0,1) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 kpageflttrap(ffff800024688470,20001880) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff800024688470) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x53 sys_preadv(ffff800021192008,ffff8000246886e8,ffff800024688740) at sys_preadv+0x5a sys/kern/vfs_syscalls.c:3281 syscall(ffff8000246887b0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246887b0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbd3ff491230, count: -9 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000246881d0 rbx 0 rdx 0 rcx 0x8 rax 0xffff800021192008 r8 0xffffffff81a8edde witness_assert+0x1fe r9 0x5 r10 0 r11 0xbffeb75e24257ce3 r12 0xffff8000246882e0 r13 0xfffffd806c916010 r14 0 r15 0xffffffff81b25d00 uvn_flush+0x950 rip 0xffffffff817b9101 uvm_fault_lower+0xbb1 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800024688140 ss 0x10 uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi ddb{1}> show proc PROC (syz-executor.1) pid=453071 stat=onproc flags process=10 proc=4000000 pri=36, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000211937a8,0xffff8000211fcaa0 process=0xffff8000ffff8c80 user=0xffff800024683000, vmspace=0xfffffd807efff450 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 55944 37868 2872 32767 2 0x10 syz-executor.1 55944 318148 2872 32767 2 0x4000010 syz-executor.1 *55944 453071 2872 32767 7 0x4000010 syz-executor.1 55944 268651 2872 32767 7 0x4000010 syz-executor.1 71929 448769 27801 32767 3 0x90 nanoslp syz-executor.0 27801 423063 82676 0 3 0x82 wait syz-executor.0 2872 157788 36657 32767 3 0x90 nanoslp syz-executor.1 36657 156751 82676 0 3 0x82 wait syz-executor.1 36062 517095 0 0 3 0x14200 bored sosplice 82676 314865 83012 0 3 0x82 thrsleep syz-fuzzer 82676 305452 83012 0 3 0x4000082 nanoslp syz-fuzzer 82676 437698 83012 0 3 0x4000082 thrsleep syz-fuzzer 82676 202239 83012 0 3 0x4000082 thrsleep syz-fuzzer 82676 522362 83012 0 3 0x4000082 thrsleep syz-fuzzer 82676 278129 83012 0 3 0x4000082 kqread syz-fuzzer 82676 517038 83012 0 3 0x4000082 thrsleep syz-fuzzer 82676 262175 83012 0 3 0x4000082 thrsleep syz-fuzzer 83012 289121 62179 0 3 0x10008a sigsusp ksh 62179 221238 95855 0 3 0x9a kqread sshd 56257 523268 1 0 3 0x100083 ttyin getty 95855 273249 1 0 3 0x88 kqread sshd 53553 153292 67888 73 3 0x100090 kqread syslogd 67888 329769 1 0 3 0x100082 netio syslogd 8440 66633 1 0 3 0x100080 kqread resolvd 98721 283392 13710 77 3 0x100092 kqread dhcpleased 66544 425922 13710 77 3 0x100092 kqread dhcpleased 13710 2712 1 0 3 0x80 kqread dhcpleased 98694 282742 0 0 3 0x14200 bored smr 40253 297796 0 0 2 0x14200 zerothread 62124 324264 0 0 3 0x14200 aiodoned aiodoned 1259 476943 0 0 3 0x14200 syncer update 7829 73175 0 0 3 0x14200 cleaner cleaner 20959 168546 0 0 3 0x14200 reaper reaper 89797 308135 0 0 3 0x14200 pgdaemon pagedaemon 4681 139093 0 0 3 0x14200 bored viomb 46998 357275 0 0 3 0x40014200 acpi0 acpi0 56613 154258 0 0 3 0x40014200 idle1 98488 62203 0 0 3 0x14200 bored softnet 18254 248853 0 0 3 0x14200 bored systqmp 15359 372824 0 0 3 0x14200 bored systq 43491 395473 0 0 3 0x40014200 bored softclock 10890 456431 0 0 3 0x40014200 idle0 1 394427 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 55944 (syz-executor.1) thread 0xffff800021192008 (453071) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828b70b8) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 __mp_acquire_count+0x4c sys/kern/kern_lock.c:227 #2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416 #3 sleep_finish+0x1b2 sys/kern/kern_synch.c:433 #4 rw_enter+0x35b sys/kern/kern_rwlock.c:286 #5 uvmfault_relock+0x6f sys/uvm/uvm_fault.c:1801 #6 uvm_fault_lower+0x931 sys/uvm/uvm_fault.c:1288 #7 uvm_fault+0x24f sys/uvm/uvm_fault.c:640 #8 kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 #9 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #10 alltraps_kern_meltdown+0x7b #11 copyin+0x53 #12 sys_preadv+0x5a sys/kern/vfs_syscalls.c:3281 #13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 Process 55944 (syz-executor.1) thread 0xffff8000211fca90 (268651) exclusive rwlock amaplk r = 0 (0xfffffd8072693050) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 uvm_fault_check+0x3d2 sys/uvm/uvm_fault.c:776 #2 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #3 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #4 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd807efff468) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 uvmfault_lookup+0xe9 sys/uvm/uvm_fault.c:1745 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:676 #3 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #4 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #5 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 #6 recall_trap+0x8 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10141 6393K 6416K 78643K 11277 0 pcb 13 12K 14K 78643K 17 0 rtable 112 3K 4K 78643K 1621 0 ifaddr 39 10K 10K 78643K 146 0 sysctl 3 1K 2K 78643K 11 0 counters 44 34K 34K 78643K 74 0 ioctlops 0 0K 2K 78643K 111 0 iov 0 0K 16K 78643K 2320 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1209 76K 76K 78643K 6811 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 199 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 5585 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 7 21K 33K 78643K 19533 0 sigio 0 0K 0K 78643K 1117 0 proc 56 74K 99K 78643K 1770 0 subproc 26 1K 1K 78643K 221 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 1K 78643K 18400 0 in_multi 33 2K 2K 78643K 3579 0 ether_multi 1 0K 0K 78643K 86 0 mrt 2 0K 0K 78643K 3 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 163 731K 731K 78643K 163 0 exec 0 0K 2K 78643K 2978 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 7 26K 26K 78643K 7 0 UVM amap 301 39K 53K 78643K 260630 0 UVM aobj 131 4K 4K 78643K 144 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 474 0 NDP 5 0K 0K 78643K 54 0 temp 76 4195K 4323K 78643K 47178 0 kqueue 14 22K 32K 78643K 1345 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 2191 0 2188 36 35 1 3 0 8 0 rtentry 112 254 0 207 2 0 2 2 0 8 0 unpcb 128 17967 0 17954 154 153 1 9 0 8 0 syncache 296 142 0 142 36 36 0 1 0 8 0 tcpqe 32 34 0 34 16 16 0 1 0 8 0 tcpcb 736 8001 0 7993 270 268 2 16 0 8 0 arp 120 44 0 38 1 0 1 1 0 8 0 ipq 40 37 0 36 17 16 1 1 0 8 0 ipqe 40 182 0 179 17 16 1 1 0 8 0 inpcb 304 28356 0 28344 266 262 4 14 0 8 2 rttmr 72 48 0 46 2 1 1 1 0 8 0 ip6q 72 49 0 49 9 9 0 1 0 8 0 ip6af 40 97 0 97 9 9 0 1 0 8 0 nd6 48 82 0 75 1 0 1 1 0 8 0 kcovpl 48 17 0 15 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1267 0 1025 34 18 16 22 0 8 0 art_table 32 1268 0 1025 4 2 2 3 0 8 0 art_node 16 253 0 210 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 2 2 1 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 5583 0 5573 1 0 1 1 0 8 0 shmpl 112 141 0 13 5 1 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 29039 0 27619 92 3 89 90 0 8 0 ffsino 272 29039 0 27619 95 0 95 95 0 8 0 nchpl 144 55752 0 54151 60 0 60 60 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 180878 0 180878 13 12 1 1 0 8 1 percpumem 16 49 0 15 1 0 1 1 0 8 0 scxspl 216 174255 0 174255 66 63 3 8 0 8 3 plimitpl 152 4308 0 4297 1 0 1 1 0 8 0 sigapl 424 19710 0 19677 4 0 4 4 0 8 0 futexpl 64 142128 0 142128 16 15 1 1 0 8 1 knotepl 112 245 0 0 3 0 3 3 0 8 0 kqueuepl 216 9109 0 9091 167 165 2 9 0 8 1 pipepl 336 5103 0 5093 133 131 2 7 0 8 1 fdescpl 496 19695 0 19677 3 0 3 3 0 8 0 filepl 152 150822 0 150718 247 241 6 14 0 8 2 lockfpl 104 2408 0 2406 2 1 1 2 0 8 0 lockfspl 48 750 0 748 1 0 1 1 0 8 0 sessionpl 144 32 0 22 1 0 1 1 0 8 0 pgrppl 48 267 0 257 1 0 1 1 0 8 0 ucredpl 96 29533 0 29521 1 0 1 1 0 8 0 zombiepl 144 19677 0 19676 1 0 1 1 0 8 0 processpl 1064 19710 0 19676 3 0 3 3 0 8 0 procpl 672 62376 0 62332 31 26 5 6 0 8 1 sosppl 168 252 0 252 36 36 0 1 0 8 0 sockpl 480 49190 0 49161 889 881 8 34 0 8 3 mcl64k 65536 56 0 0 5 2 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 57 0 0 2 0 2 2 0 8 0 mcl9k 9216 25 0 0 2 0 2 2 0 8 0 mcl8k 8192 27 0 0 3 1 2 3 0 8 0 mcl4k 4096 49 0 0 5 2 3 3 0 8 0 mcl2k2 2112 21 0 0 2 0 2 2 0 8 0 mcl2k 2048 318 0 0 18 8 10 18 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 1294 0 0 30 9 21 26 0 8 0 bufpl 288 39781 0 33456 452 0 452 452 0 8 0 anonpl 24 6001389 0 5988902 598 496 102 106 0 186 18 amapchunkpl 152 645345 0 644805 204 181 23 37 0 158 0 amappl16 200 62340 0 61974 352 324 28 33 0 8 8 amappl15 192 863 0 857 1 0 1 1 0 8 0 amappl14 184 15 0 12 1 0 1 1 0 8 0 amappl13 176 126 0 124 1 0 1 1 0 8 0 amappl12 168 8530 0 8527 1 0 1 1 0 8 0 amappl11 160 3231 0 3216 1 0 1 1 0 8 0 amappl10 152 3094 0 3090 1 0 1 1 0 8 0 amappl9 144 252 0 249 1 0 1 1 0 8 0 amappl8 136 4825 0 4694 5 0 5 5 0 8 0 amappl7 128 3996 0 3985 1 0 1 1 0 8 0 amappl6 120 130 0 118 1 0 1 1 0 8 0 amappl5 112 16269 0 16252 1 0 1 1 0 8 0 amappl4 104 7350 0 7313 3 1 2 2 0 8 0 amappl3 96 10206 0 10189 1 0 1 1 0 8 0 amappl2 88 24657 0 24610 3 1 2 2 0 8 0 amappl1 80 346908 0 346469 12 2 10 12 0 8 0 amappl 88 259280 0 259112 5 0 5 5 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 72 143 0 13 3 0 3 3 0 8 0 uaddrrnd 24 19695 0 19677 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 19695 0 19677 1 0 1 1 0 8 0 vmmpekpl 168 160553 0 160531 2 0 2 2 0 8 0 vmmpepl 168 1841949 0 1840190 358 266 92 103 0 357 6 vmsppl 368 19694 0 19677 2 0 2 2 0 8 0 rwobjpl 56 463453 0 456207 177 71 106 106 0 8 3 pdppl 4096 39398 0 39354 76 30 46 50 0 8 2 pvpl 32 9838495 0 9822378 962 788 174 203 0 265 35 pmappl 248 19694 0 19677 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 1238 0 486 23 0 23 23 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff827adff0) 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 __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x1f __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvm_fault(fffffd807efff450,bd45b7dd000,0,2) at uvm_fault+0x233 sys/uvm/uvm_fault.c:639 upageflttrap(ffff8000246ae750,bd45b7dd6f8) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff8000246ae750) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end trace frame: 0x0, count: 4 ddb{0}> trace x86_ipi_db(ffffffff827adff0) 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 __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x1f __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvm_fault(fffffd807efff450,bd45b7dd000,0,2) at uvm_fault+0x233 sys/uvm/uvm_fault.c:639 upageflttrap(ffff8000246ae750,bd45b7dd6f8) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff8000246ae750) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end trace frame: 0x0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi uvm_fault_lower(ffff8000246882e0,ffff800024688318,ffff800024688260,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efff450,20001000,0,1) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 kpageflttrap(ffff800024688470,20001880) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff800024688470) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x53 sys_preadv(ffff800021192008,ffff8000246886e8,ffff800024688740) at sys_preadv+0x5a sys/kern/vfs_syscalls.c:3281 syscall(ffff8000246887b0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246887b0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbd3ff491230, count: 6 ddb{1}> trace uvm_fault_lower(ffff8000246882e0,ffff800024688318,ffff800024688260,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efff450,20001000,0,1) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 kpageflttrap(ffff800024688470,20001880) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff800024688470) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x53 sys_preadv(ffff800021192008,ffff8000246886e8,ffff800024688740) at sys_preadv+0x5a sys/kern/vfs_syscalls.c:3281 syscall(ffff8000246887b0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246887b0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbd3ff491230, count: -9