uvm_fault(0xfffffd80643a15d8, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81577d98 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80002a2b0f00 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81577d98 Starting stack trace... panic(ffffffff833a20e5) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a2b0e50) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001484000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff800031c01a20) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff800031c01a20) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a2b1000) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806b840040,81,fffffd80097fb1a0,ffff800031c01a20) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b9583f8,ffff800031c01a20) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b9583f8,ffff800031c01a20) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806b9583f8,ffff800031c01a20) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806b9583f8,ffff800031c01a20) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff800031c01a20) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff800031c01a20,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800031c01a20,ffff80002a2b1370,ffff80002a2b12c0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a2b1370) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2b1370) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x757631fef5a0, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 91 -488539288 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 321802 7912 0 0 0 0 syz-executor *253452 43831 0 0x2 0 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x7601e2e17b50, 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(0xfffffd80643a15d8, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7601e2e17b50, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a323560 rbx 0 rdx 0 rcx 0xffff80002a2a27e0 rax 0x3b r8 0xffff80002a323490 r9 0x1 r10 0xf79c8175bcc72ccd r11 0x9f069e58f02f1f99 r12 0 r13 0 r14 0xffff80002a2a27e0 r15 0 rip 0xffffffff813a73ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a3234e0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=253452 pid=43831 tcnt=1 stat=onproc flags process=2 proc=0 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2a2fa8,0xffff80002a2a3cb0 process=0xffff80002a3044e8 user=0xffff80002a31e000, vmspace=0xfffffd800b0f3b80 estcpu=36, cpticks=48, pctcpu=0.7, user=2, sys=46, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 5815 383909 49797 0 2 0x100002 sh 27155 129145 42851 0 2 0 syz-executor 27155 512893 42851 0 3 0x4000080 fsleep syz-executor 7912 321802 43831 0 7 0 syz-executor 7912 358420 43831 0 3 0x4000080 bell syz-executor 33908 388004 21939 0 2 0 syz-executor 33908 251949 21939 0 3 0x4000080 fsleep syz-executor 62864 174694 56104 0 2 0 syz-executor 62864 316973 56104 0 3 0x4000080 fifow syz-executor 93243 219772 94023 0 3 0x80 nanoslp syz-executor 93243 265319 94023 0 2 0x4000000 syz-executor 93243 217872 94023 0 3 0x4000080 fsleep syz-executor 49797 502892 61362 0 3 0x82 wait syz-executor 38330 91112 0 0 3 0x14200 acct acct 94128 185223 1 0 3 0x100083 ttyin getty 75487 14880 61362 0 2 0x2 syz-executor 85852 110452 0 0 3 0x14200 bored sosplice 56104 85896 61362 0 3 0x82 nanoslp syz-executor 94023 441798 61362 0 3 0x82 nanoslp syz-executor 21939 74598 61362 0 3 0x82 nanoslp syz-executor 90346 47368 61362 0 3 0x82 nanoslp syz-executor 42851 291212 61362 0 3 0x82 nanoslp syz-executor *43831 253452 61362 0 7 0x2 syz-executor 61362 170222 58108 0 3 0x82 kqread syz-executor 58108 80356 2164 0 3 0x10008a sigsusp ksh 2164 506143 28189 0 3 0x98 kqread sshd-session 28189 333420 8144 0 3 0x92 kqread sshd-session 8144 136379 1 0 3 0x88 kqread sshd 39236 172718 38534 74 3 0x1100092 bpf pflogd 38534 245703 1 0 3 0x80 sbwait pflogd 86574 369909 1496 73 3 0x1100090 kqread syslogd 1496 29517 1 0 3 0x100082 sbwait syslogd 7684 128315 1 0 3 0x100080 kqread resolvd 74531 388928 38468 77 3 0x100092 kqread dhcpleased 18941 409893 38468 77 3 0x100092 kqread dhcpleased 38468 130702 1 0 3 0x80 kqread dhcpleased 27894 311036 0 0 3 0x14200 bored smr 51059 310889 0 0 2 0x14200 zerothread 97978 396642 0 0 3 0x14200 aiodoned aiodoned 40466 167459 0 0 3 0x14200 syncer update 63684 343429 0 0 3 0x14200 cleaner cleaner 32237 89829 0 0 3 0x14200 reaper reaper 12490 506762 0 0 3 0x14200 pgdaemon pagedaemon 34975 135672 0 0 3 0x14200 bored viomb 16972 128081 0 0 3 0x40014200 acpi0 acpi0 43902 427361 0 0 3 0x40014200 idle1 20092 269040 0 0 3 0x14200 bored softnet7 37791 421832 0 0 3 0x14200 bored softnet6 49401 394740 0 0 3 0x14200 bored softnet5 28100 232960 0 0 3 0x14200 bored softnet4 63906 11425 0 0 3 0x14200 bored softnet3 19052 364600 0 0 3 0x14200 bored softnet2 81183 405303 0 0 3 0x14200 bored softnet1 71056 161375 0 0 3 0x14200 netlock softnet0 26359 431047 0 0 2 0x40014200 systqmp 92545 48247 0 0 3 0x14200 bored systq 33332 372610 0 0 3 0x14200 tmoslp softclockmp 36438 347133 0 0 3 0x40014200 tmoslp softclock 92164 269964 0 0 3 0x40014200 idle0 1 20497 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10256 11089K 11355K 166960K 12199 0 pcb 17 15K 17K 166960K 514 0 rtable 214 11K 11K 166960K 430 0 pf 48 20K 131089K 166960K 206 0 ifaddr 47 8K 8K 166960K 114 0 ifgroup 64 2K 2K 166960K 187 0 sysctl 4 1K 9K 166960K 17 0 counters 76 37K 38K 166960K 228 0 ioctlops 0 0K 4K 166960K 1718 0 iov 0 0K 16K 166960K 96 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1385 87K 87K 166960K 2206 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 13 10K 10K 166960K 200 0 dirhash 12 2K 2K 166960K 42 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 110K 166960K 1187 0 sigio 0 0K 0K 166960K 30 0 proc 72 115K 180K 166960K 727 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 123 0 in_multi 90 6K 7K 166960K 159 0 ether_multi 1 0K 0K 166960K 9 0 mrt 1 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 247 1102K 1102K 166960K 247 0 exec 0 0K 1K 166960K 598 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 230 160K 174K 166960K 12733 0 UVM aobj 29 4K 4K 166960K 31 0 pinsyscall 42 84K 104K 166960K 2337 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 82 0 NDP 15 0K 2K 166960K 81 0 temp 78 8656K 8784K 166960K 79634 0 kqueue 14 22K 32K 166960K 269 0 SYN cache 2 16K 16K 166960K 2 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 120 181 0 178 3 2 1 3 0 8 0 rtentry 176 135 0 51 5 0 5 5 0 8 0 unpcb 144 693 0 674 5 3 2 4 0 8 1 syncache 336 11 0 11 2 1 1 1 0 8 1 tcpqe 32 4 0 4 2 1 1 1 0 8 1 tcpcb 736 351 0 343 7 3 4 4 0 8 3 arp 136 14 0 2 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 328 1383 0 1371 12 5 7 7 0 8 4 nd6 144 20 0 5 1 0 1 1 0 8 0 pkpcb 40 8 0 8 3 2 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 mppekey 1024 2 0 2 2 2 0 1 0 8 0 ppxss 1192 68 0 65 2 1 1 1 0 8 0 pppxif 1504 2 0 1 2 1 1 1 0 8 0 pfstscr 40 7 0 5 2 1 1 1 0 8 0 pffrag 232 7 0 2 1 0 1 1 0 482 0 pffrnode 88 5 0 1 1 0 1 1 0 8 0 pffrent 40 14 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 pfanchor 1288 5 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 88 0 23 1 0 1 1 0 8 0 pfstkey 128 96 0 33 3 0 3 3 0 8 0 pfstate 384 88 0 27 7 0 7 7 0 8 0 pfrule 1344 32 0 26 2 1 1 2 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 711 0 336 33 5 28 30 0 8 1 art_table 40 715 0 336 5 0 5 5 0 8 0 art_node 32 132 0 60 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 2 1 0 1 1 0 8 0 semapl 112 195 0 184 1 0 1 1 0 8 0 shmpl 112 28 0 2 1 0 1 1 0 8 0 dirhash 1024 37 0 20 3 0 3 3 0 8 0 dino2pl 256 3647 0 2126 96 0 96 96 0 8 0 ffsino 296 3647 0 2126 118 0 118 118 0 8 1 nchpl 144 5251 0 3551 64 0 64 64 0 8 0 rtmask 32 18 0 18 2 1 1 1 0 8 1 uvmvnodes 80 4135 0 0 85 0 85 85 0 8 0 vnodes 216 4135 0 0 230 0 230 230 0 8 0 namei 1024 18730 0 18730 3 1 2 2 0 8 2 percpumem 16 129 0 76 1 0 1 1 0 8 0 kstatmem 264 126 0 94 5 2 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 5 0 5 2 2 0 1 0 8 0 scxspl 216 26674 0 26674 11 9 2 8 1 8 2 plimitpl 152 330 0 313 1 0 1 1 0 8 0 sigapl 424 1493 0 1438 7 0 7 7 0 8 0 knotepl 120 732 0 0 22 0 22 22 0 8 0 kqueuepl 224 473 0 462 7 2 5 5 0 8 4 pipepl 344 372 0 344 9 6 3 9 0 8 0 fdescpl 528 1464 0 1433 3 0 3 3 0 8 0 filepl 160 9319 0 9097 19 5 14 16 0 8 4 lockfpl 104 380 0 378 1 0 1 1 0 8 0 lockfspl 48 143 0 141 1 0 1 1 0 8 0 sessionpl 144 32 0 23 1 0 1 1 0 8 0 pgrppl 48 55 0 38 1 0 1 1 0 8 0 ucredpl 104 1369 0 1355 1 0 1 1 0 8 0 zombiepl 144 1439 0 1438 1 0 1 1 0 8 0 processpl 1232 1493 0 1438 5 0 5 5 0 8 0 procpl 664 3297 0 3236 7 0 7 7 0 8 0 sosppl 168 7 0 7 2 1 1 1 0 8 1 sockpl 752 2359 0 2325 19 8 11 14 0 8 6 mcl64k 65536 7 0 0 1 0 1 1 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 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 48 0 0 6 0 6 6 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 410 0 0 26 0 26 26 0 8 0 bufpl 280 12086 0 5943 440 1 439 440 0 8 0 anonpl 32 11740 0 0 95 0 95 95 0 246 0 amapchunkpl 152 42257 0 41801 42 13 29 32 0 158 10 amappl16 200 6340 0 6309 30 13 17 20 0 8 8 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 127 0 115 1 0 1 1 0 8 0 amappl13 176 27 0 27 1 1 0 1 0 8 0 amappl12 168 2135 0 2102 4 2 2 3 0 8 0 amappl11 160 79 0 65 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 21 0 19 1 0 1 1 0 8 0 amappl7 128 118 0 104 1 0 1 1 0 8 0 amappl6 120 206 0 201 1 0 1 1 0 8 0 amappl5 112 135 0 126 1 0 1 1 0 8 0 amappl4 104 333 0 312 1 0 1 1 0 8 0 amappl3 96 7291 0 7200 3 0 3 3 0 8 0 amappl2 88 1761 0 1681 2 0 2 2 0 8 0 amappl1 80 14174 0 13567 16 1 15 15 0 8 0 amappl 88 11799 0 11642 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 dma512 512 2 0 2 2 2 0 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 256 0 256 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 30 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1464 0 1433 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1464 0 1433 1 0 1 1 0 8 0 vmmpekpl 168 14446 0 14405 3 0 3 3 0 8 0 vmmpepl 168 99739 0 97772 108 6 102 107 0 357 7 vmsppl 488 1463 0 1433 6 1 5 5 0 8 0 rwobjpl 80 33443 0 28340 107 0 107 107 0 8 0 pdppl 4096 2936 0 2866 110 36 74 88 0 8 4 pvpl 32 19550 0 0 158 0 158 158 0 265 0 pmappl 256 1463 0 1433 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 319 0 53 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8379dff0) 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+0x25 kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 sys/dev/kcov.c:153 __mp_lock(ffffffff83892960) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83892960) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 intr_handler(ffff80002f7fba80,ffff800000069c00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff83892960) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83892960) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7601e2e17980, count: 4 ddb{0}> trace x86_ipi_db(ffffffff8379dff0) 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+0x25 kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 sys/dev/kcov.c:153 __mp_lock(ffffffff83892960) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83892960) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 intr_handler(ffff80002f7fba80,ffff800000069c00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff83892960) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83892960) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7601e2e17980, count: -11 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x7601e2e17b50, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7601e2e17b50, count: -1