uvm_fault(0xfffffd80609fad80, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff819cc198 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80002a3b9b30 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff819cc198 Starting stack trace... panic(ffffffff833c4f15) at panic+464 kerntrap(ffff80002a3b9a80) at kerntrap+779 alltraps_kern_meltdown() at alltraps_kern_meltdown+123 dt_ioctl_record_stop(ffff800001600000) at dt_ioctl_record_stop+264 dtclose(11e5f,81,2000,ffff8000fffefca0) at dtclose+265 spec_close(ffff80002a3b9c30) at spec_close+1126 VOP_CLOSE(fffffd805d49f958,81,fffffd80097fb410,ffff8000fffefca0) at VOP_CLOSE+306 vn_closefile(fffffd805d16ca80,ffff8000fffefca0) at vn_closefile+299 fdrop(fffffd805d16ca80,ffff8000fffefca0) at fdrop+289 closef(fffffd805d16ca80,ffff8000fffefca0) at closef+402 fdfree(ffff8000fffefca0) at fdfree+278 exit1(ffff8000fffefca0,0,0,1) at exit1+1398 sys_exit(ffff8000fffefca0,ffff80002a3b9fa0,ffff80002a3b9ef0) at sys_exit+26 syscall(ffff80002a3b9fa0) at syscall+2839 Xsyscall() at Xsyscall+296 end of kernel end trace frame: 0x7008e242ed10, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 91 -1649215512 EXIT 0 4 Stopped at savectx+174: movl $0,%gs:1672 TID PID UID PRFLAGS PFLAGS CPU COMMAND 327096 83943 0 0 0x4000000 0 syz-executor * 40513 66058 0 0x2 0 1 syz-executor savectx() at savectx+174 end of kernel end trace frame: 0x6fd49db2f7d0, 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(0xfffffd80609fad80, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+174 end of kernel end trace frame: 0x6fd49db2f7d0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 18446603336928872000 rbx 0 rdx 0 rcx 18446603337038931296 rax 60 r8 18446603336928871792 r9 1 r10 17874607743946968512 r11 12912746693191732777 r12 0 r13 0 r14 18446603337038931296 r15 0 rip 18446744071589917678 savectx+174 cs 8 rflags 70 rsp 18446603336928871872 ss 16 savectx+174: movl $0,%gs:1672 ddb{1}> show proc PROC (syz-executor) tid=40513 pid=66058 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=0xffff800030bdb4f0,0xffff80003c420fc8 process=0xffff8000ffff04e0 user=0xffff80002a2df000, vmspace=0xfffffd806eeaa7a8 estcpu=36, cpticks=71, pctcpu=0.4, user=7, sys=64, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 83943 154500 87898 0 2 0 syz-executor 83943 327096 87898 0 7 0x4000000 syz-executor 59200 46749 28232 0 2 0 syz-executor 59200 403915 28232 0 3 0x4000080 ttyin syz-executor 7196 123386 66058 0 2 0xc80 syz-executor 7196 207403 66058 0 3 0x4000080 kqread syz-executor 7196 64018 66058 0 3 0x4000080 fsleep syz-executor 96458 341301 19952 0 2 0xc80 syz-executor 96458 514825 19952 0 3 0x4000080 kqsel syz-executor 96458 192322 19952 0 3 0x4000080 fsleep syz-executor 80454 92093 19253 0 2 0xc80 syz-executor 80454 364593 19253 0 3 0x4000080 netcon syz-executor 80454 108647 19253 0 3 0x4000080 sbwait syz-executor 80454 418558 19253 0 3 0x4000080 fsleep syz-executor 33437 402578 0 0 3 0x14200 acct acct 19253 92965 9172 0 2 0xc82 syz-executor 67221 3556 9172 0 2 0xc82 syz-executor 28232 271091 9172 0 2 0xc82 syz-executor 49662 142558 1 0 3 0x100083 ttyin getty 87898 214592 9172 0 2 0xc82 syz-executor 76135 129771 9172 0 2 0xc82 syz-executor *66058 40513 9172 0 7 0x2 syz-executor 57864 130631 9172 0 2 0xc82 syz-executor 19952 298657 9172 0 2 0xc82 syz-executor 9172 178484 91609 0 3 0x82 kqread syz-executor 91609 377257 22309 0 3 0x10008a sigsusp ksh 22309 50067 73066 0 3 0x98 kqread sshd-session 73066 428271 3377 0 3 0x92 kqread sshd-session 3377 361997 1 0 3 0x88 kqread sshd 68601 189363 66443 74 3 0x1100092 bpf pflogd 66443 430476 1 0 3 0x80 sbwait pflogd 49031 465533 99079 73 3 0x1100090 kqread syslogd 99079 70939 1 0 3 0x100082 sbwait syslogd 4829 367778 1 0 3 0x100080 kqread resolvd 76922 31013 36931 77 3 0x100092 kqread dhcpleased 25874 179623 36931 77 3 0x100092 kqread dhcpleased 36931 290244 1 0 3 0x80 kqread dhcpleased 46183 122144 0 0 3 0x14200 bored smr 77340 58360 0 0 3 0x14200 pgzero zerothread 46003 252137 0 0 3 0x14200 aiodoned aiodoned 27551 375121 0 0 3 0x14200 syncer update 86124 388436 0 0 3 0x14200 cleaner cleaner 55455 216947 0 0 3 0x14200 reaper reaper 47576 32459 0 0 3 0x14200 pgdaemon pagedaemon 25218 352165 0 0 3 0x14200 bored viomb 1425 487560 0 0 3 0x40014200 acpi0 acpi0 65343 176297 0 0 3 0x40014200 idle1 85989 413827 0 0 3 0x14200 bored softnet1 59641 502819 0 0 3 0x14200 netlock softnet0 57547 372436 0 0 2 0x40014200 systqmp 99648 14809 0 0 3 0x14200 bored systq 90349 368751 0 0 2 0x14200 softclockmp 63301 11593 0 0 3 0x40014200 tmoslp softclock 3392 122418 0 0 3 0x40014200 idle0 1 471456 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 10266 11138K 12517K 166960K 16556 0 pcb 19 22K 32K 166960K 1923 0 rtable 205 15K 16K 166960K 1521 0 pf 39 18K 67487K 166960K 653 0 ifaddr 34 9K 12K 166960K 405 0 ifgroup 63 2K 3K 166960K 805 0 sysctl 4 1K 9K 166960K 59 0 counters 70 37K 38K 166960K 1092 0 ioctlops 0 0K 8K 166960K 3349 0 iov 0 0K 24K 166960K 640 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1507 95K 96K 166960K 6257 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 23 33K 33K 166960K 228 0 dirhash 12 2K 2K 166960K 69 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 5779 0 sigio 2 0K 0K 166960K 151 0 proc 76 131K 179K 166960K 1577 0 subproc 72 4K 4K 166960K 165 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 1516 0 in_multi 55 4K 7K 166960K 437 0 ether_multi 1 0K 0K 166960K 69 0 mrt 1 0K 0K 166960K 58 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 1397 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 10 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 279 170K 188K 166960K 54731 0 UVM aobj 141 10K 10K 166960K 149 0 pinsyscall 43 86K 102K 166960K 7302 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 1K 166960K 465 0 NDP 13 0K 1K 166960K 301 0 temp 86 8660K 8804K 166960K 256673 0 kqueue 15 24K 36K 166960K 1199 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 120 666 0 662 5 4 1 3 0 8 0 rtentry 176 421 0 356 6 1 5 6 0 8 0 unpcb 144 4542 0 4520 28 26 2 6 0 8 1 syncache 336 34 0 34 11 10 1 1 0 8 1 tcpqe 32 20 0 20 8 7 1 1 0 8 1 tcpcb 736 2832 0 2818 43 35 8 8 0 8 6 arp 136 54 0 42 1 0 1 1 0 8 0 inpcb 328 8892 0 8873 74 61 13 16 0 8 11 nd6 152 66 0 54 1 0 1 1 0 8 0 pkpcb 40 49 0 48 10 9 1 1 0 8 0 kcovpl 48 18 0 10 1 0 1 1 0 8 0 mppekey 1024 6 0 6 3 3 0 1 0 8 0 ppxss 1192 414 0 414 4 3 1 1 0 8 1 pppxif 1504 88 0 88 8 8 0 1 0 8 0 pffrag 232 108 0 97 2 0 2 2 0 482 0 pffrnode 88 44 0 35 1 0 1 1 0 8 0 pffrent 40 212 0 201 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 5 0 5 5 4 1 1 0 8 1 pfstitem 24 425 0 345 2 0 2 2 0 8 0 pfstkey 128 425 0 345 7 1 6 7 0 8 0 pfstate 384 425 0 345 20 6 14 20 0 8 4 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 10 0 10 5 4 1 1 0 8 1 art_heap8 4096 6 0 1 5 0 5 5 0 8 0 art_heap4 256 1857 0 1564 43 17 26 31 0 8 1 art_table 40 1863 0 1565 6 1 5 5 0 8 0 art_node 32 381 0 325 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 4 1 0 1 1 0 8 0 semupl 112 2 0 2 2 1 1 1 0 8 1 semapl 112 213 0 192 1 0 1 1 0 8 0 shmpl 112 146 0 8 4 0 4 4 0 8 0 dirhash 1024 55 0 38 3 0 3 3 0 8 0 dino2pl 256 12905 0 11382 97 1 96 96 0 8 0 ffsino 296 12905 0 11382 118 0 118 118 0 8 0 nchpl 144 21113 0 20467 65 40 25 64 0 8 0 rtmask 32 58 0 58 8 8 0 1 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 76809 0 76809 5 4 1 2 0 8 1 percpumem 16 561 0 511 1 0 1 1 0 8 0 kstatmem 264 532 0 500 3 0 3 3 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 23 0 23 10 9 1 1 0 8 1 scxspl 216 125042 0 125042 19 17 2 8 1 8 2 plimitpl 152 1762 0 1745 1 0 1 1 0 8 0 sigapl 424 6109 0 6060 9 2 7 8 0 8 0 knotepl 120 790 0 0 24 0 24 24 0 8 0 kqueuepl 224 2685 0 2670 29 24 5 5 0 8 3 pipepl 344 900 0 872 12 9 3 6 0 8 0 fdescpl 528 6063 0 6031 3 0 3 3 0 8 0 filepl 160 47439 0 47198 49 30 19 19 0 8 6 lockfpl 104 2036 0 2034 1 0 1 1 0 8 0 lockfspl 48 741 0 739 1 0 1 1 0 8 0 sessionpl 144 65 0 56 1 0 1 1 0 8 0 pgrppl 48 247 0 230 1 0 1 1 0 8 0 ucredpl 104 8390 0 8376 1 0 1 1 0 8 0 zombiepl 144 6883 0 6880 2 1 1 1 0 8 0 processpl 1232 6109 0 6060 7 2 5 6 0 8 1 procpl 664 15551 0 15493 9 3 6 8 0 8 0 sosppl 176 49 0 49 12 11 1 1 0 8 1 sockpl 752 14377 0 14331 119 102 17 21 0 8 11 mcl64k 65536 39 0 0 4 1 3 4 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 138 0 0 16 0 16 16 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 120 0 0 11 3 8 11 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 2267 0 0 137 0 137 137 0 8 0 bufpl 280 45830 0 39693 439 0 439 439 0 8 0 anonpl 32 16848 0 0 135 0 135 135 0 246 0 amapchunkpl 152 192073 0 191390 78 44 34 42 0 158 4 amappl16 200 20121 0 20015 103 81 22 36 0 8 7 amappl15 192 30 0 30 1 1 0 1 0 8 0 amappl14 184 28 0 27 1 0 1 1 0 8 0 amappl13 176 551 0 550 1 0 1 1 0 8 0 amappl12 168 6581 0 6538 4 1 3 3 0 8 0 amappl11 160 16 0 15 3 2 1 1 0 8 0 amappl10 152 48 0 34 1 0 1 1 0 8 0 amappl9 144 249 0 248 2 1 1 1 0 8 0 amappl8 136 34 0 31 1 0 1 1 0 8 0 amappl7 128 137 0 135 1 0 1 1 0 8 0 amappl6 120 435 0 421 1 0 1 1 0 8 0 amappl5 112 113 0 100 1 0 1 1 0 8 0 amappl4 104 622 0 591 1 0 1 1 0 8 0 amappl3 96 33927 0 33822 3 0 3 3 0 8 0 amappl2 88 6383 0 6301 5 3 2 3 0 8 0 amappl1 80 40688 0 40097 20 5 15 16 0 8 0 amappl 88 52621 0 52421 6 1 5 6 0 92 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 dma65536 65536 2 0 2 2 2 0 1 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 3 0 2 1 0 1 1 0 8 0 dma256 256 10 0 10 4 4 0 1 0 8 0 dma128 128 263 0 263 7 7 0 1 0 8 0 dma64 64 9 0 9 4 4 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 22 0 21 1 0 1 1 0 8 0 aobjpl 72 148 0 8 3 0 3 3 0 8 0 uaddrrnd 24 6063 0 6031 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6063 0 6031 1 0 1 1 0 8 0 vmmpekpl 168 45519 0 45461 4 0 4 4 0 8 0 vmmpepl 168 392227 0 390125 153 44 109 122 0 357 2 vmsppl 488 6062 0 6031 6 1 5 5 0 8 0 rwobjpl 80 104814 0 97699 162 8 154 159 0 8 0 pdppl 4096 12134 0 12062 140 66 74 86 0 8 2 pvpl 32 25423 0 0 204 0 204 204 0 265 0 pmappl 256 6062 0 6031 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 533 0 149 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+39: addq $8,%rsp x86_ipi_db(ffffffff837e1ff0) at x86_ipi_db+39 x86_ipi_handler() at x86_ipi_handler+217 Xresume_lapic_ipi() at Xresume_lapic_ipi+39 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+56 __mp_lock(ffffffff83896708) at __mp_lock+419 softintr_dispatch(0) at softintr_dispatch+293 dosoftint(0) at dosoftint+84 Xsoftclock() at Xsoftclock+39 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+56 __mp_lock(ffffffff83896708) at __mp_lock+419 vn_ioctl(fffffd800c4db9a8,80044b02,ffff80003c43da90,ffff8000fffee7e0) at vn_ioctl+77 sys_ioctl(ffff8000fffee7e0,ffff80003c43dc70,ffff80003c43dbc0) at sys_ioctl+1652 syscall(ffff80003c43dc70) at syscall+3028 Xsyscall() at Xsyscall+296 end of kernel end trace frame: 0xc5735b30170, count: 1 ddb{0}> trace x86_ipi_db(ffffffff837e1ff0) at x86_ipi_db+39 x86_ipi_handler() at x86_ipi_handler+217 Xresume_lapic_ipi() at Xresume_lapic_ipi+39 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+56 __mp_lock(ffffffff83896708) at __mp_lock+419 softintr_dispatch(0) at softintr_dispatch+293 dosoftint(0) at dosoftint+84 Xsoftclock() at Xsoftclock+39 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+56 __mp_lock(ffffffff83896708) at __mp_lock+419 vn_ioctl(fffffd800c4db9a8,80044b02,ffff80003c43da90,ffff8000fffee7e0) at vn_ioctl+77 sys_ioctl(ffff8000fffee7e0,ffff80003c43dc70,ffff80003c43dbc0) at sys_ioctl+1652 syscall(ffff80003c43dc70) at syscall+3028 Xsyscall() at Xsyscall+296 end of kernel end trace frame: 0xc5735b30170, count: -14 ddb{0}> machine ddbcpu 1 Stopped at savectx+174: movl $0,%gs:1672 savectx() at savectx+174 end of kernel end trace frame: 0x6fd49db2f7d0, count: 14 ddb{1}> trace savectx() at savectx+174 end of kernel end trace frame: 0x6fd49db2f7d0, count: -1