¹j¼õ¬|ÿ ž¨E1\…:uvm_fault(0xfffffd800f31b208, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81dea0c8 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c405eb0 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81dea0c8 Starting stack trace... panic(ffffffff833cdc67) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c405e00) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000152c000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80003abf3cb0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003abf3cb0) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c405fb0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80622e9c20,81,fffffd80097fd6e8,ffff80003abf3cb0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8070459640,ffff80003abf3cb0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8070459640,ffff80003abf3cb0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8070459640,ffff80003abf3cb0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8070459640,ffff80003abf3cb0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003abf3cb0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003abf3cb0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003abf3cb0,ffff80003c406320,ffff80003c406270) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c406320) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c406320) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76af5e9a0d10, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 83 1504654752 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *512674 53739 0 0 0 1 syz-executor 66069 11466 0 0x2 0x1 0 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x793e07e45900, 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(0xfffffd800f31b208, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x793e07e45900, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c436a90 rbx 0 rdx 0 rcx 0xffff80002f7dc7e8 rax 0x3b r8 0xffff80003c4369c0 r9 0x1 r10 0xf6918f2e4f76ca16 r11 0x785d4a98b059d6b r12 0 r13 0 r14 0xffff80002f7dc7e8 r15 0 rip 0xffffffff82f8f3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c436a10 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=512674 pid=53739 tcnt=4 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002f7dc2b8,0xffff80002f7dd788 process=0xffff80003c447518 user=0xffff80003c431000, vmspace=0xfffffd800f31b5d8 estcpu=36, cpticks=6, pctcpu=0.0, user=5, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 71456 377451 0 0 3 0x14280 nfsidl nfsio 28030 245675 0 0 3 0x14280 nfsidl nfsio 8242 142614 0 0 3 0x14280 nfsidl nfsio 55431 59336 0 0 3 0x14280 nfsidl nfsio 31457 74576 5555 0 2 0x100002 sh *53739 512674 19023 0 7 0 syz-executor 53739 398394 19023 0 3 0x4000080 fsleep syz-executor 53739 169620 19023 0 3 0x4000080 fsleep syz-executor 53739 375062 19023 0 3 0x4000080 fsleep syz-executor 84397 377592 87193 0 2 0 syz-executor 84397 118738 87193 0 3 0x4000080 fsleep syz-executor 77874 339287 65372 0 2 0 syz-executor 77874 211796 65372 0 3 0x4000080 bell syz-executor 77874 172501 65372 0 3 0x4000080 fsleep syz-executor 19825 170205 22346 0 2 0 syz-executor 19825 453648 22346 0 3 0x4000080 fsleep syz-executor 99981 348229 55133 0 2 0 syz-executor 99981 116459 55133 0 3 0x4000080 fsleep syz-executor 88548 230240 11466 0 2 0 syz-executor 88548 463366 11466 0 3 0x4000080 fsleep syz-executor 5555 435523 78857 0 3 0x82 wait syz-executor 49491 512705 0 0 3 0x14200 acct acct 48132 480085 78857 0 3 0x82 nanoslp syz-executor 65372 23572 78857 0 2 0xc82 syz-executor 55133 268292 78857 0 3 0x82 nanoslp syz-executor 37587 373425 1 0 3 0x100083 ttyopn getty 19023 64193 78857 0 3 0x82 nanoslp syz-executor 22346 476134 78857 0 3 0x82 nanoslp syz-executor 87193 204329 78857 0 2 0x2 syz-executor 11466 66069 78857 0 7 0x3 syz-executor 78857 2589 25811 0 3 0x82 kqread syz-executor 25811 303614 96110 0 3 0x10008a sigsusp ksh 96110 274562 30830 0 3 0x98 kqread sshd-session 30830 142349 74113 0 3 0x92 kqread sshd-session 74113 190183 1 0 3 0x88 kqread sshd 19118 129739 63221 74 3 0x1100092 bpf pflogd 63221 163622 1 0 3 0x80 sbwait pflogd 48405 337439 22281 73 3 0x1100090 kqread syslogd 22281 81014 1 0 3 0x100082 sbwait syslogd 59412 441841 1 0 3 0x100080 kqread resolvd 62221 263750 15584 77 3 0x100092 kqread dhcpleased 63652 207953 15584 77 3 0x100092 kqread dhcpleased 15584 325576 1 0 3 0x80 kqread dhcpleased 74054 509366 0 0 3 0x14200 bored smr 19146 175111 0 0 2 0x14200 zerothread 54339 448672 0 0 3 0x14200 aiodoned aiodoned 23793 486152 0 0 3 0x14200 syncer update 63100 40522 0 0 3 0x14200 cleaner cleaner 43341 319807 0 0 3 0x14200 reaper reaper 24791 13848 0 0 3 0x14200 pgdaemon pagedaemon 55465 359671 0 0 3 0x14200 bored viomb 7003 403673 0 0 3 0x40014200 acpi0 acpi0 3969 151590 0 0 3 0x40014200 idle1 22404 77861 0 0 3 0x14200 bored softnet1 52849 149919 0 0 3 0x14200 netlock softnet0 96655 164906 0 0 2 0x14200 systqmp 36357 320730 0 0 3 0x14200 bored systq 52872 51446 0 0 3 0x14200 tmoslp softclockmp 6163 479366 0 0 3 0x40014200 tmoslp softclock 6427 356117 0 0 3 0x40014200 idle0 1 72638 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 10264 11159K 12352K 166960K 16751 0 pcb 19 16K 18K 166960K 901 0 rtable 161 13K 13K 166960K 1007 0 pf 39 18K 67485K 166960K 362 0 ifaddr 26 5K 8K 166960K 247 0 ifgroup 65 2K 3K 166960K 461 0 sysctl 4 1K 9K 166960K 27 0 counters 70 37K 38K 166960K 486 0 ioctlops 0 0K 4K 166960K 2263 0 iov 0 0K 28K 166960K 199 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1541 97K 98K 166960K 4316 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 21 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 157 0 dirhash 12 2K 3K 166960K 69 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 232K 166960K 2887 0 sigio 0 0K 0K 166960K 110 0 proc 73 115K 147K 166960K 1073 0 subproc 72 4K 4K 166960K 162 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 541 0 in_multi 33 2K 7K 166960K 349 0 ether_multi 1 0K 0K 166960K 49 0 mrt 1 0K 0K 166960K 36 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 265 1182K 1182K 166960K 265 0 exec 0 0K 1K 166960K 928 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 7 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 258 164K 178K 166960K 27879 0 UVM aobj 12 8K 8K 166960K 14 0 pinsyscall 43 86K 104K 166960K 4260 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 169 0 NDP 13 0K 2K 166960K 174 0 temp 80 8672K 8800K 166960K 152938 0 kqueue 16 23K 35K 166960K 628 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 120 405 0 402 5 4 1 3 0 8 0 rtentry 176 284 0 241 6 1 5 6 0 8 1 unpcb 144 1780 0 1763 13 9 4 6 0 8 3 syncache 336 9 0 9 3 3 0 1 0 8 0 tcpqe 32 4 0 4 1 1 0 1 0 8 0 tcpcb 736 669 0 663 10 9 1 8 0 8 0 arp 136 41 0 34 1 0 1 1 0 8 0 inpcb 328 3274 0 3259 40 34 6 10 0 8 4 nd6 152 58 0 47 2 1 1 2 0 8 0 pkpcb 40 24 0 24 4 4 0 1 0 8 0 kcovpl 48 18 0 10 1 0 1 1 0 8 0 mppekey 1024 4 0 4 3 3 0 1 0 8 0 ppxss 1192 156 0 156 3 2 1 1 0 8 1 pppxif 1504 30 0 30 6 5 1 1 0 8 1 pffrag 232 20 0 12 1 0 1 1 0 482 0 pffrnode 88 19 0 11 1 0 1 1 0 8 0 pffrent 40 29 0 21 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 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 206 0 100 1 0 1 1 0 8 0 pfstkey 128 206 0 100 4 0 4 4 0 8 0 pfstate 448 206 0 100 13 0 13 13 0 8 0 pfrule 1344 24 0 19 2 1 1 2 0 8 0 rttmr 136 6 0 6 4 4 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 1386 0 1211 33 15 18 29 0 8 1 art_table 40 1390 0 1211 5 0 5 5 0 8 1 art_node 32 280 0 244 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 155 0 145 1 0 1 1 0 8 0 shmpl 112 6 0 0 1 0 1 1 0 8 0 dirhash 1024 55 0 38 3 0 3 3 0 8 0 dino2pl 256 6726 0 5205 96 0 96 96 0 8 0 ffsino 296 6726 0 5205 118 0 118 118 0 8 0 nchpl 144 10657 0 8922 65 0 65 65 0 8 0 rtmask 32 27 0 27 5 4 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 38342 0 38342 3 2 1 2 0 8 1 percpumem 16 258 0 208 1 0 1 1 0 8 0 vcpupl 3968 4 0 1 1 0 1 1 0 8 0 vmpool 840 5 0 2 1 0 1 1 0 8 0 kstatmem 264 286 0 254 7 4 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 14 0 14 7 7 0 1 0 8 0 scxspl 216 58756 0 58756 16 15 1 8 1 8 1 plimitpl 152 744 0 726 2 0 2 2 0 8 0 sigapl 424 3182 0 3129 8 1 7 7 0 8 0 knotepl 120 628 0 0 17 0 17 17 0 8 0 kqueuepl 224 1228 0 1216 13 12 1 5 0 8 0 pipepl 344 512 0 484 7 4 3 6 0 8 0 fdescpl 528 3145 0 3113 3 0 3 3 0 8 0 filepl 160 21609 0 21379 35 22 13 18 0 8 2 lockfpl 104 1147 0 1141 2 1 1 2 0 8 0 lockfspl 48 480 0 474 1 0 1 1 0 8 0 sessionpl 144 38 0 29 1 0 1 1 0 8 0 pgrppl 48 173 0 156 1 0 1 1 0 8 0 ucredpl 104 3489 0 3476 1 0 1 1 0 8 0 zombiepl 144 3644 0 3643 1 0 1 1 0 8 0 processpl 1232 3182 0 3129 6 1 5 5 0 8 0 procpl 664 7920 0 7858 9 3 6 7 0 8 0 sosppl 176 20 0 20 4 4 0 1 0 8 0 sockpl 752 5611 0 5576 69 59 10 20 0 8 6 mcl64k 65536 25 0 0 4 1 3 4 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 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 126 0 0 16 0 16 16 0 8 0 mcl2k 2048 46 0 0 6 0 6 6 0 8 0 mtagpl 96 180 0 0 5 0 5 5 0 8 0 mbufpl 256 1643 0 0 103 0 103 103 0 8 0 bufpl 280 23006 0 16869 439 0 439 439 0 8 0 anonpl 32 12716 0 0 103 0 103 103 0 246 0 amapchunkpl 152 97461 0 96757 59 28 31 38 0 158 3 amappl16 200 8352 0 8285 46 28 18 28 0 8 5 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 10 0 10 2 2 0 1 0 8 0 amappl13 176 551 0 549 1 0 1 1 0 8 0 amappl12 168 3573 0 3530 3 0 3 3 0 8 0 amappl11 160 35 0 35 1 1 0 1 0 8 0 amappl10 152 52 0 38 1 0 1 1 0 8 0 amappl9 144 251 0 250 2 1 1 1 0 8 0 amappl8 136 28 0 25 1 0 1 1 0 8 0 amappl7 128 243 0 241 1 0 1 1 0 8 0 amappl6 120 398 0 383 1 0 1 1 0 8 0 amappl5 112 82 0 70 1 0 1 1 0 8 0 amappl4 104 485 0 454 1 0 1 1 0 8 0 amappl3 96 17132 0 17035 4 1 3 3 0 8 0 amappl2 88 3260 0 3182 2 0 2 2 0 8 0 amappl1 80 22410 0 21808 18 3 15 16 0 8 0 amappl 88 26542 0 26365 5 0 5 5 0 92 0 uvmvnodes 80 191 0 0 4 0 4 4 0 8 0 dma65536 65536 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 10 0 10 3 3 0 1 0 8 0 dma128 128 259 0 259 4 4 0 1 0 8 0 dma64 64 40 0 40 3 3 0 1 0 8 0 dma32 32 8 0 8 2 1 1 1 0 8 1 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 13 0 2 1 0 1 1 0 8 0 uaddrrnd 24 3145 0 3113 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3145 0 3113 1 0 1 1 0 8 0 vmmpekpl 168 24535 0 24479 3 0 3 3 0 8 0 vmmpepl 168 201338 0 199329 118 16 102 110 0 357 2 vmsppl 488 3144 0 3113 5 0 5 5 0 8 0 rwobjpl 80 51149 0 49951 35 4 31 34 0 8 0 pdppl 4096 6307 0 6233 128 52 76 83 0 8 2 pvpl 32 19690 0 0 159 1 158 158 0 265 0 pmappl 256 3149 0 3115 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 436 0 90 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff838a4ff0) 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+0xb kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xb sys/dev/kcov.c:153 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff838ddd40) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838ddd40) at __mp_lock+0x199 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff838ddd40) at __mp_lock+0x19e __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838ddd40) at __mp_lock+0x19e sys/kern/kern_lock.c:173 ktrsyscall(ffff8000ffffdc90,b,20,ffff80002a318e00) at ktrsyscall+0x2c7 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff8000ffffdc90,b,20,ffff80002a318e00) at ktrsyscall+0x2c7 sys/kern/kern_ktrace.c:183 syscall(ffff80002a318e00) at syscall+0x304 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80002a318e00) at syscall+0x304 sys/arch/amd64/amd64/trap.c:765 end trace frame: 0xffff80002a318e80, count: 0 ddb{0}> trace x86_ipi_db(ffffffff838a4ff0) 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+0xb kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xb sys/dev/kcov.c:153 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff838ddd40) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838ddd40) at __mp_lock+0x199 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff838ddd40) at __mp_lock+0x19e __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838ddd40) at __mp_lock+0x19e sys/kern/kern_lock.c:173 ktrsyscall(ffff8000ffffdc90,b,20,ffff80002a318e00) at ktrsyscall+0x2c7 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff8000ffffdc90,b,20,ffff80002a318e00) at ktrsyscall+0x2c7 sys/kern/kern_ktrace.c:183 syscall(ffff80002a318e00) at syscall+0x304 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80002a318e00) at syscall+0x304 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7245c8281f80, count: -15 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x793e07e45900, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x793e07e45900, count: -1