uvm_fault(0xfffffd805c5449b0, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff810f1aa8 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003500ec40 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff810f1aa8 Starting stack trace... panic(ffffffff833a53b9) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003500eb90) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000147c000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff800034008fb0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff800034008fb0) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003500ed40) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805ccb8620,81,fffffd80097fb4e0,ffff800034008fb0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806f3bae68,ffff800034008fb0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806f3bae68,ffff800034008fb0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806f3bae68,ffff800034008fb0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806f3bae68,ffff800034008fb0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff800034008fb0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff800034008fb0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800034008fb0,ffff80003500f0b0,ffff80003500f000) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003500f0b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003500f0b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d5530818540, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 4 3 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 30889 13213 0 0 0x4000000 0 syz-executor *129504 76958 0 0x2 0 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x77587e6627f0, count: 14 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(0xfffffd805c5449b0, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x77587e6627f0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a2b74b0 rbx 0 rdx 0 rcx 0xffff80002a2b8fa8 rax 0x31 r8 0xffff80002a2b73e0 r9 0x1 r10 0xd07cbae6d348f939 r11 0x76a92de21c148770 r12 0 r13 0 r14 0xffff80002a2b8fa8 r15 0 rip 0xffffffff812153ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a2b7430 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=129504 pid=76958 tcnt=1 stat=onproc flags process=2 proc=0 runpri=71, usrpri=71, slppri=24, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2b87e0,0xffff80002a2b8a88 process=0xffff80002a2c04e8 user=0xffff80002a2b2000, vmspace=0xfffffd800b0fb1f8 estcpu=21, cpticks=228, pctcpu=0.83, user=4, sys=207, intr=16 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 13213 472655 1890 0 2 0 syz-executor 13213 30889 1890 0 7 0x4000000 syz-executor 66274 109534 90021 0 3 0x80 nanoslp syz-executor 66274 222878 90021 0 3 0x4000080 kqread syz-executor 66274 257500 90021 0 3 0x4000080 fsleep syz-executor 66274 45345 90021 0 3 0x4000080 fsleep syz-executor 70488 82345 97188 -1 3 0x90 nanoslp syz-executor 70488 504431 97188 -1 3 0x4000090 kqsel syz-executor 70488 409026 97188 -1 3 0x4000090 fsleep syz-executor 97188 282295 76958 0 3 0x82 nanoslp syz-executor 746 348826 76958 0 3 0x82 piperd syz-executor 67668 36538 0 0 3 0x14200 bored sosplice 11612 212756 76958 0 2 0x10000002 syz-executor 90021 385844 76958 0 3 0x82 nanoslp syz-executor 61683 244748 76958 0 3 0x82 nanoslp syz-executor 89648 76303 76958 0 3 0x82 nanoslp syz-executor 1890 309697 76958 0 3 0x82 nanoslp syz-executor 25759 1597 76958 0 3 0x2 biowait syz-executor *76958 129504 28150 0 7 0x2 syz-executor 28150 147349 48272 0 3 0x10008a sigsusp ksh 48272 425240 14191 0 3 0x98 kqread sshd-session 14191 479022 84034 0 3 0x92 kqread sshd-session 62867 248557 1 0 3 0x100083 ttyin getty 84034 370459 1 0 3 0x88 kqread sshd 64624 36027 12115 74 3 0x1100092 bpf pflogd 12115 173549 1 0 3 0x80 sbwait pflogd 91757 78085 11660 73 3 0x1100090 kqread syslogd 11660 415851 1 0 3 0x100082 sbwait syslogd 36188 494730 1 0 3 0x100080 kqread resolvd 144 406263 0 0 3 0x14200 bored smr 52215 472367 0 0 3 0x14200 pgzero zerothread 3300 268325 0 0 3 0x14200 aiodoned aiodoned 35359 7057 0 0 3 0x14200 syncer update 30578 386172 0 0 3 0x14200 cleaner cleaner 54319 160383 0 0 3 0x14200 reaper reaper 23635 487045 0 0 3 0x14200 pgdaemon pagedaemon 70339 297709 0 0 3 0x14200 bored viomb 87852 51734 0 0 3 0x40014200 acpi0 acpi0 32886 165776 0 0 3 0x40014200 idle1 2079 90503 0 0 3 0x14200 bored softnet7 62487 23246 0 0 3 0x14200 bored softnet6 56310 380901 0 0 3 0x14200 bored softnet5 11273 148159 0 0 3 0x14200 bored softnet4 19594 339603 0 0 3 0x14200 bored softnet3 97464 212873 0 0 3 0x14200 bored softnet2 97592 73549 0 0 3 0x14200 bored softnet1 90828 58013 0 0 3 0x14200 netlock softnet0 32123 187789 0 0 2 0x40014200 systqmp 51772 474437 0 0 3 0x14200 bored systq 89377 30457 0 0 3 0x14200 tmoslp softclockmp 94113 143419 0 0 3 0x40014200 tmoslp softclock 67088 155066 0 0 3 0x40014200 idle0 1 351716 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 25759 (syz-executor) thread 0xffff80002a2b8a78 (1597) exclusive rrwlock inode r = 0 (0xfffffd806e127dd0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2a2 sys/kern/vfs_subr.c:693 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806cac8a08) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10241 11087K 11230K 166960K 12519 0 pcb 17 15K 16K 166960K 457 0 rtable 192 12K 13K 166960K 517 0 pf 40 19K 67487K 166960K 230 0 ifaddr 37 6K 8K 166960K 129 0 ifgroup 55 2K 3K 166960K 223 0 sysctl 4 1K 9K 166960K 16 0 counters 68 36K 37K 166960K 306 0 ioctlops 0 0K 4K 166960K 1855 0 iov 0 0K 16K 166960K 95 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1465 92K 93K 166960K 2624 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 23 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 72 0 dirhash 12 2K 2K 166960K 39 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 110K 166960K 1679 0 sigio 0 0K 0K 166960K 25 0 proc 66 83K 180K 166960K 755 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 394 0 in_multi 77 5K 7K 166960K 208 0 ether_multi 1 0K 0K 166960K 26 0 mrt 2 0K 0K 166960K 15 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 1K 166960K 658 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 201 137K 174K 166960K 16890 0 UVM aobj 79 3K 3K 166960K 81 0 pinsyscall 34 68K 106K 166960K 2865 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 114 0 NDP 12 0K 2K 166960K 87 0 temp 79 8652K 8780K 166960K 80285 0 kqueue 10 18K 32K 166960K 353 0 SYN cache 2 8K 16K 166960K 3 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 190 0 189 1 0 1 1 0 8 0 rtentry 176 173 0 106 5 0 5 5 0 8 0 unpcb 144 1366 0 1349 18 17 1 6 0 8 0 syncache 336 17 0 17 4 4 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 847 0 842 20 19 1 7 0 8 0 arp 128 21 0 12 1 0 1 1 0 8 0 inpcb 328 2484 0 2477 31 29 2 13 0 8 1 nd6 144 25 0 12 1 0 1 1 0 8 0 pkpcb 40 11 0 11 4 3 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 98 0 98 5 4 1 1 0 8 1 pppxif 1504 41 0 41 4 4 0 1 0 8 0 pfstscr 40 4 0 4 3 3 0 1 0 8 0 pffrag 232 12 0 2 1 0 1 1 0 482 0 pffrnode 88 11 0 2 1 0 1 1 0 8 0 pffrent 40 19 0 9 1 0 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 pfrktable 1344 2 0 2 2 2 0 1 0 8 0 pfanchor 1288 4 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 106 0 39 1 0 1 1 0 8 0 pfstkey 128 119 0 52 3 0 3 3 0 8 0 pfstate 384 113 0 46 7 0 7 7 0 8 0 pfrule 1344 31 0 26 2 1 1 2 0 8 0 rttmr 136 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 788 0 420 32 7 25 29 0 8 0 art_table 40 791 0 420 5 0 5 5 0 8 0 art_node 32 167 0 111 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 9 2 1 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 65 0 55 1 0 1 1 0 8 0 shmpl 112 78 0 2 3 0 3 3 0 8 0 dirhash 1024 35 0 18 3 0 3 3 0 8 0 dino2pl 256 4555 0 3047 96 0 96 96 0 8 0 ffsino 296 4555 0 3047 117 0 117 117 0 8 0 nchpl 144 6890 0 5190 64 0 64 64 0 8 0 rtmask 32 15 0 15 3 3 0 1 0 8 0 uvmvnodes 80 5287 0 0 108 0 108 108 0 8 0 vnodes 216 5287 0 0 294 0 294 294 0 8 0 namei 1024 23137 0 23137 4 3 1 2 0 8 1 percpumem 16 168 0 119 1 0 1 1 0 8 0 kstatmem 264 138 0 110 3 0 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 8 0 8 3 3 0 1 0 8 0 scxspl 216 39390 0 39389 16 14 2 8 1 8 1 plimitpl 152 358 0 341 1 0 1 1 0 8 0 sigapl 424 2002 0 1952 9 2 7 9 0 8 0 knotepl 120 538 0 0 17 0 17 17 0 8 0 kqueuepl 224 675 0 665 7 6 1 3 0 8 0 pipepl 344 362 0 334 15 6 9 9 0 8 6 fdescpl 528 1955 0 1929 3 0 3 3 0 8 0 filepl 160 13153 0 12940 41 25 16 20 0 8 4 lockfpl 104 808 0 806 3 2 1 2 0 8 0 lockfspl 48 247 0 245 1 0 1 1 0 8 0 sessionpl 144 38 0 30 1 0 1 1 0 8 0 pgrppl 48 58 0 42 1 0 1 1 0 8 0 ucredpl 104 1918 0 1907 1 0 1 1 0 8 0 zombiepl 144 2242 0 2239 1 0 1 1 0 8 0 processpl 1232 2002 0 1952 6 1 5 6 0 8 0 procpl 664 4734 0 4678 11 4 7 8 0 8 0 sosppl 168 15 0 15 4 4 0 1 0 8 0 sockpl 752 4094 0 4069 62 57 5 18 0 8 2 mcl64k 65536 24 0 0 3 0 3 3 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 126 0 0 16 0 16 16 0 8 0 mcl2k 2048 117 0 0 14 0 14 14 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 364 0 0 23 0 23 23 0 8 0 bufpl 280 15273 0 9130 440 0 440 440 0 8 0 anonpl 32 13997 0 0 113 0 113 113 0 246 0 amapchunkpl 152 59536 0 59104 55 29 26 35 0 158 1 amappl16 200 7179 0 7150 58 49 9 26 0 8 1 amappl15 192 5 0 5 3 3 0 1 0 8 0 amappl14 184 143 0 134 1 0 1 1 0 8 0 amappl13 176 7 0 7 1 1 0 1 0 8 0 amappl12 168 2714 0 2688 4 2 2 3 0 8 0 amappl11 160 54 0 45 1 0 1 1 0 8 0 amappl10 152 13 0 13 1 1 0 1 0 8 0 amappl9 144 263 0 263 1 1 0 1 0 8 0 amappl8 136 23 0 20 1 0 1 1 0 8 0 amappl7 128 131 0 121 1 0 1 1 0 8 0 amappl6 120 218 0 214 1 0 1 1 0 8 0 amappl5 112 132 0 125 1 0 1 1 0 8 0 amappl4 104 376 0 356 1 0 1 1 0 8 0 amappl3 96 10248 0 10173 4 1 3 4 0 8 0 amappl2 88 2298 0 2236 2 0 2 2 0 8 0 amappl1 80 18028 0 17516 16 1 15 15 0 8 1 amappl 88 15824 0 15679 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma32768 32768 2 0 2 1 1 0 1 0 8 0 dma8192 8192 1 0 1 1 1 0 1 0 8 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 7 0 7 2 2 0 1 0 8 0 dma128 128 255 0 255 3 3 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 80 0 2 2 0 2 2 0 8 0 uaddrrnd 24 1955 0 1929 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1955 0 1929 1 0 1 1 0 8 0 vmmpekpl 168 18477 0 18429 3 0 3 3 0 8 0 vmmpepl 168 132181 0 130575 138 38 100 116 0 357 5 vmsppl 488 1954 0 1929 6 1 5 5 0 8 0 rwobjpl 80 42511 0 36355 133 2 131 132 0 8 0 pdppl 4096 3918 0 3858 116 44 72 86 0 8 12 pvpl 32 24553 0 0 198 0 198 198 0 265 0 pmappl 256 1954 0 1929 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 347 0 84 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837f8ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff83873590) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83873590) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 intr_handler(ffff80003c44d5d0,ffff800000069c00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff83873590) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83873590) at __mp_lock+0x199 sys/kern/kern_lock.c:165 intr_handler(ffff80003c44d730,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff83873590) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83873590) at __mp_lock+0x192 sys/kern/kern_lock.c:165 syscall(ffff80003c44d900) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80003c44d900) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x317932692c0, count: 2 ddb{0}> trace x86_ipi_db(ffffffff837f8ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff83873590) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83873590) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 intr_handler(ffff80003c44d5d0,ffff800000069c00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff83873590) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83873590) at __mp_lock+0x199 sys/kern/kern_lock.c:165 intr_handler(ffff80003c44d730,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff83873590) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83873590) at __mp_lock+0x192 sys/kern/kern_lock.c:165 syscall(ffff80003c44d900) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80003c44d900) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x317932692c0, count: -13 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x77587e6627f0, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x77587e6627f0, count: -1