uvm_fault(0xfffffd800b027000, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff816cfc48 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80002e3fb890 gsbase 0xffff8000299fdff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff816cfc48 Starting stack trace... panic(ffffffff833a0373) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002e3fb7e0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001493000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff80003c459cc0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c459cc0) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002e3fb990) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80764a2018,81,fffffd80097fb618,ffff80003c459cc0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c1b42a0,ffff80003c459cc0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c1b42a0,ffff80003c459cc0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c1b42a0,ffff80003c459cc0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c1b42a0,ffff80003c459cc0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c459cc0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c459cc0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c459cc0,ffff80002e3fbd00,ffff80002e3fbc50) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002e3fbd00) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002e3fbd00) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78bc12d17c10, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 91 20 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *493343 73748 0 0x10000002 0 1 syz-executor 125094 99239 0 0x100003 0x80 0 getty savectx() at savectx+0xae end of kernel end trace frame: 0x7a17c0d02ce0, 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}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd800b027000, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7a17c0d02ce0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c435a70 rbx 0 rdx 0 rcx 0xffff8000357f8fb0 rax 0x33 r8 0xffff80003c4359a0 r9 0 r10 0x9e9c7097004d82ed r11 0xc890bf354306d84a r12 0 r13 0 r14 0xffff8000357f8fb0 r15 0 rip 0xffffffff818933ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c4359f0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=493343 pid=73748 tcnt=1 stat=onproc flags process=10000002 proc=0 runpri=32, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000357f8a80,0xffff8000fffeed20 process=0xffff80002e7dd368 user=0xffff80003c430000, vmspace=0xfffffd806b9db7b8 estcpu=33, cpticks=8, pctcpu=0.3, user=0, sys=7, intr=1 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 75112 259592 18978 0 2 0 syz-executor 5484 388003 50953 0 2 0 syz-executor 5484 131425 50953 0 2 0x4000000 syz-executor 94501 321769 25976 0 2 0 syz-executor 94501 116876 25976 0 3 0x4000080 fsleep syz-executor 94501 312802 25976 0 3 0x4000080 fsleep syz-executor 68941 182239 34667 0 2 0xc80 syz-executor 68941 152475 34667 0 3 0x4000080 lockf syz-executor 68941 134267 34667 0 3 0x4000080 lockf syz-executor 68941 501574 34667 0 3 0x4000080 fsleep syz-executor 78596 22524 65668 0 2 0xc80 syz-executor 78596 136745 65668 0 3 0x4000080 kqpoll syz-executor 78596 33855 65668 0 3 0x4000080 fsleep syz-executor 50953 237445 95994 0 2 0xc82 syz-executor *73748 493343 95994 0 7 0x10000002 syz-executor 99239 125094 1 0 7 0x100083 getty 34667 21169 95994 0 2 0xc82 syz-executor 26526 418155 95994 0 2 0xc82 syz-executor 18978 158411 95994 0 2 0xc82 syz-executor 65668 202574 95994 0 2 0xc82 syz-executor 86910 498114 0 0 3 0x14200 bored sosplice 10682 473414 95994 0 2 0xc82 syz-executor 25976 174132 95994 0 2 0xc82 syz-executor 95994 257566 99986 0 3 0x82 kqread syz-executor 99986 16961 96095 0 3 0x10008a sigsusp ksh 96095 14296 85806 0 3 0x98 kqread sshd-session 85806 248941 99649 0 3 0x92 kqread sshd-session 99649 491003 1 0 3 0x88 kqread sshd 20369 70210 59604 74 3 0x1100092 bpf pflogd 59604 285301 1 0 3 0x80 sbwait pflogd 86027 458887 77202 73 3 0x1100090 kqread syslogd 77202 17149 1 0 3 0x100082 sbwait syslogd 74287 392540 1 0 3 0x100080 kqread resolvd 85772 330704 46676 77 3 0x100092 kqread dhcpleased 6649 511476 46676 77 3 0x100092 kqread dhcpleased 46676 68049 1 0 3 0x80 kqread dhcpleased 48611 265720 0 0 2 0x14a00 smr 95955 261871 0 0 2 0x14200 zerothread 66029 177901 0 0 3 0x14200 aiodoned aiodoned 48092 281466 0 0 3 0x14200 syncer update 12472 94470 0 0 3 0x14200 cleaner cleaner 35834 395385 0 0 3 0x14200 reaper reaper 41442 12635 0 0 3 0x14200 pgdaemon pagedaemon 6092 283489 0 0 3 0x14200 bored viomb 65356 417666 0 0 3 0x40014200 acpi0 acpi0 75252 62808 0 0 3 0x40014200 idle1 26728 398029 0 0 3 0x14200 bored softnet1 62904 522809 0 0 2 0x14200 softnet0 44644 491645 0 0 3 0x14200 smrbar systqmp 86045 203087 0 0 3 0x14200 bored systq 48598 372994 0 0 3 0x14200 netlock softclockmp 74286 433078 0 0 3 0x40014200 tmoslp softclock 38878 153758 0 0 3 0x40014200 idle0 1 48167 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 44644 (systqmp) thread 0xffff8000ffffe7c8 (491645) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10247 11139K 11432K 166960K 13046 0 pcb 17 16K 17K 166960K 367 0 rtable 193 10K 12K 166960K 774 0 pf 39 18K 83K 166960K 214 0 ifaddr 36 6K 8K 166960K 159 0 ifgroup 56 2K 2K 166960K 258 0 sysctl 4 1K 9K 166960K 21 0 counters 68 36K 38K 166960K 266 0 ioctlops 0 0K 4K 166960K 1806 0 iov 0 0K 24K 166960K 112 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1425 90K 90K 166960K 2625 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 26 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 40 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 97K 166960K 1677 0 sigio 0 0K 0K 166960K 21 0 proc 73 115K 164K 166960K 1030 0 subproc 72 4K 4K 166960K 181 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 192 0 in_multi 74 5K 7K 166960K 279 0 ether_multi 1 0K 0K 166960K 10 0 mrt 1 0K 0K 166960K 15 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 812 0 fusefs mount 1 32K 32K 166960K 1 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 241 168K 182K 166960K 16240 0 UVM aobj 52 3K 3K 166960K 55 0 pinsyscall 42 84K 104K 166960K 3138 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 85 0 NDP 14 0K 2K 166960K 116 0 temp 78 8652K 8895K 166960K 60163 0 kqueue 14 22K 31K 166960K 393 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 120 154 0 151 1 0 1 1 0 8 0 rtentry 176 278 0 207 5 0 5 5 0 8 0 unpcb 144 761 0 744 4 3 1 3 0 8 0 syncache 336 9 0 9 4 4 0 1 0 8 0 tcpqe 32 2 0 2 2 2 0 1 0 8 0 tcpcb 736 416 0 410 5 4 1 4 0 8 0 arp 136 29 0 20 1 0 1 1 0 8 0 inpcb 328 1473 0 1464 18 11 7 10 0 8 5 nd6 144 47 0 33 1 0 1 1 0 8 0 pkpcb 40 11 0 11 3 3 0 1 0 8 0 kcovpl 48 20 0 12 1 0 1 1 0 8 0 ppxss 1192 69 0 69 1 0 1 1 0 8 1 pppxif 1504 9 0 9 3 3 0 1 0 8 0 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 8 0 0 1 0 1 1 0 482 0 pffrnode 88 8 0 0 1 0 1 1 0 8 0 pffrent 40 91 0 83 1 0 1 1 0 8 0 pfosfp 40 1431 0 1006 5 0 5 5 0 8 0 pfosfpen 112 1431 0 715 21 0 21 21 0 8 0 pfrktable 1344 3 0 3 2 2 0 1 0 8 0 pftag 88 2 0 2 1 1 0 1 0 8 0 pfstitem 24 102 0 30 1 0 1 1 0 8 0 pfstkey 128 107 0 35 3 0 3 3 0 8 0 pfstate 384 105 0 34 8 0 8 8 0 8 0 pfrule 1344 31 0 25 2 0 2 2 0 8 0 rttmr 136 3 0 3 2 2 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 1222 0 884 35 4 31 32 0 8 6 art_table 40 1225 0 884 6 0 6 6 0 8 0 art_node 32 275 0 212 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 37 0 27 1 0 1 1 0 8 0 shmpl 112 52 0 3 2 0 2 2 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 4129 0 2599 96 0 96 96 0 8 0 ffsino 296 4129 0 2599 118 0 118 118 0 8 0 nchpl 144 6288 0 4561 65 0 65 65 0 8 0 rtmask 32 16 0 16 3 2 1 1 0 8 1 uvmvnodes 80 4983 0 0 102 0 102 102 0 8 0 vnodes 216 4983 0 0 277 0 277 277 0 8 0 namei 1024 21444 0 21444 4 3 1 2 0 8 1 percpumem 16 148 0 99 1 0 1 1 0 8 0 kstatmem 264 156 0 128 4 1 3 3 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 8 0 8 4 3 1 1 0 8 1 scxspl 216 22795 0 22795 9 8 1 8 1 8 1 plimitpl 152 386 0 369 1 0 1 1 0 8 0 sigapl 424 1985 0 1936 9 2 7 9 0 8 1 knotepl 120 564 0 0 17 0 17 17 0 8 0 kqueuepl 224 602 0 592 5 3 2 3 0 8 1 pipepl 344 258 0 230 3 0 3 3 0 8 0 fdescpl 528 1946 0 1915 3 0 3 3 0 8 0 filepl 160 10803 0 10581 21 8 13 16 0 8 0 lockfpl 104 756 0 751 2 1 1 2 0 8 0 lockfspl 48 243 0 240 1 0 1 1 0 8 0 sessionpl 144 42 0 33 1 0 1 1 0 8 0 pgrppl 48 144 0 127 1 0 1 1 0 8 0 ucredpl 104 1737 0 1722 1 0 1 1 0 8 0 zombiepl 144 1939 0 1936 1 0 1 1 0 8 0 processpl 1232 1985 0 1936 6 1 5 6 0 8 0 procpl 664 4382 0 4325 8 1 7 8 0 8 0 sosppl 168 8 0 8 4 3 1 1 0 8 1 sockpl 752 2465 0 2436 25 15 10 15 0 8 5 mcl64k 65536 17 0 0 3 0 3 3 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 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 120 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 46 0 0 5 0 5 5 0 8 0 mtagpl 96 35 0 0 1 0 1 1 0 8 0 mbufpl 256 275 0 0 17 0 17 17 0 8 0 bufpl 280 8421 0 2277 441 1 440 440 0 8 0 anonpl 32 10385 0 0 84 0 84 84 0 246 0 amapchunkpl 152 54925 0 54343 48 20 28 32 0 158 2 amappl16 200 5889 0 5789 41 26 15 19 0 8 8 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 154 0 142 1 0 1 1 0 8 0 amappl13 176 7 0 7 2 2 0 1 0 8 0 amappl12 168 2819 0 2788 4 1 3 3 0 8 1 amappl11 160 51 0 37 1 0 1 1 0 8 0 amappl10 152 50 0 49 1 0 1 1 0 8 0 amappl9 144 256 0 256 1 1 0 1 0 8 0 amappl8 136 28 0 25 1 0 1 1 0 8 0 amappl7 128 142 0 130 1 0 1 1 0 8 0 amappl6 120 310 0 307 1 0 1 1 0 8 0 amappl5 112 173 0 161 1 0 1 1 0 8 0 amappl4 104 353 0 334 1 0 1 1 0 8 0 amappl3 96 9587 0 9493 3 0 3 3 0 8 0 amappl2 88 2282 0 2205 2 0 2 2 0 8 0 amappl1 80 17103 0 16496 15 0 15 15 0 8 0 amappl 88 15042 0 14874 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 2 0 2 1 0 1 1 0 8 1 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 257 0 257 4 3 1 1 0 8 1 dma64 64 8 0 8 2 2 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 3 1 0 1 1 0 8 0 uaddrrnd 24 1946 0 1915 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1946 0 1915 1 0 1 1 0 8 0 vmmpekpl 168 16795 0 16739 4 1 3 3 0 8 0 vmmpepl 168 127921 0 125837 111 5 106 107 0 357 7 vmsppl 488 1945 0 1915 5 0 5 5 0 8 0 rwobjpl 80 39709 0 33660 127 0 127 127 0 8 2 pdppl 4096 3900 0 3830 140 66 74 88 0 8 4 pvpl 32 18998 0 0 153 0 153 153 0 265 0 pmappl 256 1945 0 1915 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 338 0 83 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837adff0) 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 __mp_lock(ffffffff838a6868) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838a6868) at __mp_lock+0x192 sys/kern/kern_lock.c:165 __mp_acquire_count(ffffffff838a6868,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:367 ttread(ffff800000afc200,ffff8000357f7c88,0) at ttread+0x7d3 ttysleep_nsec sys/kern/tty.c:2324 [inline] ttread(ffff800000afc200,ffff8000357f7c88,0) at ttread+0x7d3 ttysleep sys/kern/tty.c:2314 [inline] ttread(ffff800000afc200,ffff8000357f7c88,0) at ttread+0x7d3 sys/kern/tty.c:1587 spec_read(ffff8000357f7ae0) at spec_read+0x14b sys/kern/spec_vnops.c:215 VOP_READ(fffffd8079abb370,ffff8000357f7c88,0,fffffd80097fbea0) at VOP_READ+0x101 sys/kern/vfs_vops.c:227 vn_read(fffffd806b88ba38,ffff8000357f7c88,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff8000357f8a80,0,ffff8000357f7c88,0,ffff8000357f7d40) at dofilereadv+0x25a sys/kern/sys_generic.c:252 sys_read(ffff8000357f8a80,ffff8000357f7df0,ffff8000357f7d40) at sys_read+0xa2 sys/kern/sys_generic.c:172 syscall(ffff8000357f7df0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000357f7df0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7df673299ba0, count: 1 ddb{0}> trace x86_ipi_db(ffffffff837adff0) 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 __mp_lock(ffffffff838a6868) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838a6868) at __mp_lock+0x192 sys/kern/kern_lock.c:165 __mp_acquire_count(ffffffff838a6868,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:367 ttread(ffff800000afc200,ffff8000357f7c88,0) at ttread+0x7d3 ttysleep_nsec sys/kern/tty.c:2324 [inline] ttread(ffff800000afc200,ffff8000357f7c88,0) at ttread+0x7d3 ttysleep sys/kern/tty.c:2314 [inline] ttread(ffff800000afc200,ffff8000357f7c88,0) at ttread+0x7d3 sys/kern/tty.c:1587 spec_read(ffff8000357f7ae0) at spec_read+0x14b sys/kern/spec_vnops.c:215 VOP_READ(fffffd8079abb370,ffff8000357f7c88,0,fffffd80097fbea0) at VOP_READ+0x101 sys/kern/vfs_vops.c:227 vn_read(fffffd806b88ba38,ffff8000357f7c88,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff8000357f8a80,0,ffff8000357f7c88,0,ffff8000357f7d40) at dofilereadv+0x25a sys/kern/sys_generic.c:252 sys_read(ffff8000357f8a80,ffff8000357f7df0,ffff8000357f7d40) at sys_read+0xa2 sys/kern/sys_generic.c:172 syscall(ffff8000357f7df0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000357f7df0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7df673299ba0, count: -14 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x7a17c0d02ce0, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7a17c0d02ce0, count: -1