uvm_fault(0xfffffd806baea028, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82376fa8 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80002a3a9030 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82376fa8 Starting stack trace... panic(ffffffff8339d546) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a3a8f80) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001850000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff80002a345a48) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002a345a48) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a3a9130) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805e84d718,81,fffffd80097fb4e0,ffff80002a345a48) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8075bc6c68,ffff80002a345a48) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8075bc6c68,ffff80002a345a48) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8075bc6c68,ffff80002a345a48) at fdrop+0x121 sys/kern/kern_descrip.c:1267 closef(fffffd8075bc6c68,ffff80002a345a48) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80002a345a48) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80002a345a48,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a345a48,ffff80002a3a94a0,ffff80002a3a93f0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a3a94a0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3a94a0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d5d385bdd10, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON TRAP EXIT 4 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *184583 52035 0 0 0 1 syz-executor 488123 36558 0 0 0 0 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x79fb9260eb00, 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(0xfffffd806baea028, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x79fb9260eb00, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800035007f50 rbx 0 rdx 0 rcx 0xffff80002a344058 rax 0x2a r8 0xffff800035007e80 r9 0x1 r10 0x2fd6669eecc6b7c7 r11 0x69693901e2563789 r12 0 r13 0xffffffff82619218 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff81b0a4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff800035007ed0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=184583 pid=52035 tcnt=2 stat=onproc flags process=0 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a344588,0xffff80002a344300 process=0xffff800039c249e0 user=0xffff800035002000, vmspace=0xfffffd806baea9b0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 96171 94013 10217 0 2 0 syz-executor *52035 184583 18204 0 7 0 syz-executor 52035 321508 18204 0 3 0x4000080 rest syz-executor 36558 488123 83634 0 7 0 syz-executor 36558 187653 83634 0 2 0x4000000 syz-executor 49436 329148 88270 0 3 0x80 nanoslp syz-executor 49436 436463 88270 0 3 0x4000080 kqsel syz-executor 49436 130386 88270 0 3 0x4000080 fsleep syz-executor 11430 106809 45226 0 3 0x80 nanoslp syz-executor 11430 93311 45226 0 3 0x4000080 sbwait syz-executor 11430 149583 45226 0 3 0x4000080 fsleep syz-executor 27430 112249 1 0 3 0x100083 ttyin getty 43240 257943 0 0 3 0x14200 acct acct 83634 442591 775 0 2 0x3 syz-executor 88270 136306 775 0 3 0x82 nanoslp syz-executor 33501 45683 775 0 3 0x82 wait syz-executor 35376 39920 775 0 3 0x82 wait syz-executor 14320 201120 0 0 3 0x14280 nfsidl nfsio 55478 65513 0 0 3 0x14280 nfsidl nfsio 20103 379327 0 0 3 0x14280 nfsidl nfsio 48153 269275 0 0 3 0x14280 nfsidl nfsio 89212 118655 0 0 3 0x14280 nfsidl nfsio 3638 92768 0 0 3 0x14280 nfsidl nfsio 24585 331077 0 0 3 0x14280 nfsidl nfsio 35500 329656 0 0 3 0x14280 nfsidl nfsio 93033 110252 0 0 3 0x14280 nfsidl nfsio 1195 259705 0 0 3 0x14280 nfsidl nfsio 38286 28358 0 0 3 0x14280 nfsidl nfsio 32710 405514 0 0 3 0x14280 nfsidl nfsio 58923 344136 0 0 3 0x14280 nfsidl nfsio 34375 40037 0 0 3 0x14280 nfsidl nfsio 2415 315286 0 0 3 0x14280 nfsidl nfsio 58424 141210 0 0 3 0x14280 nfsidl nfsio 3171 123862 0 0 3 0x14280 nfsidl nfsio 37607 458169 0 0 3 0x14280 nfsidl nfsio 58750 436541 0 0 3 0x14280 nfsidl nfsio 85236 50971 0 0 3 0x14280 nfsidl nfsio 10217 160716 775 0 3 0x82 nanoslp syz-executor 45226 11747 775 0 3 0x82 nanoslp syz-executor 18204 124425 775 0 3 0x82 nanoslp syz-executor 79673 420863 775 0 3 0x82 nanoslp syz-executor 56576 215833 0 0 3 0x14200 bored sosplice 775 323143 62190 0 3 0x82 kqread syz-executor 62190 320657 64919 0 3 0x10008a sigsusp ksh 64919 343588 14763 0 3 0x98 kqread sshd-session 14763 29897 37389 0 3 0x92 kqread sshd-session 37389 173489 1 0 3 0x88 kqread sshd 44154 94763 22270 74 3 0x1100092 bpf pflogd 22270 494231 1 0 3 0x80 sbwait pflogd 65372 183208 59061 73 3 0x1100090 kqread syslogd 59061 145742 1 0 3 0x100082 sbwait syslogd 55999 59926 1 0 3 0x100080 kqread resolvd 23845 248438 0 0 3 0x14200 bored smr 19147 163523 0 0 3 0x14200 pgzero zerothread 12931 270773 0 0 3 0x14200 aiodoned aiodoned 45852 523002 0 0 3 0x14200 syncer update 73681 197388 0 0 3 0x14200 cleaner cleaner 61032 214651 0 0 2 0x14200 reaper 92861 204978 0 0 3 0x14200 pgdaemon pagedaemon 75638 195851 0 0 3 0x14200 bored viomb 68998 133798 0 0 3 0x40014200 acpi0 acpi0 40417 391439 0 0 3 0x40014200 idle1 3808 54371 0 0 3 0x14200 bored softnet7 77727 147046 0 0 3 0x14200 bored softnet6 28922 10336 0 0 3 0x14200 bored softnet5 97330 144873 0 0 3 0x14200 bored softnet4 55936 403586 0 0 3 0x14200 bored softnet3 91743 47220 0 0 3 0x14200 bored softnet2 74581 424895 0 0 3 0x14200 bored softnet1 73114 135009 0 0 3 0x14200 netlock softnet0 14576 505231 0 0 2 0x14200 systqmp 24557 216678 0 0 3 0x14200 bored systq 13173 390834 0 0 3 0x14200 tmoslp softclockmp 35906 426580 0 0 3 0x40014200 tmoslp softclock 35657 229967 0 0 3 0x40014200 idle0 1 105583 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 61032 (reaper) thread 0xffff8000ffffc2a0 (214651) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10295 11201K 13688K 166960K 22548 0 pcb 17 20K 26K 166960K 4032 0 rtable 287 20K 21K 166960K 3246 0 pf 50 20K 67489K 166960K 1489 0 ifaddr 54 17K 20K 166960K 916 0 ifgroup 73 3K 3K 166960K 1800 0 sysctl 4 1K 9K 166960K 264 0 counters 76 37K 38K 166960K 2130 0 ioctlops 0 0K 4K 166960K 4917 0 iov 0 0K 32K 166960K 1693 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1721 108K 108K 166960K 14963 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 324K 560K 166960K 134 0 VM map 2 1K 1K 166960K 2 0 sem 22 296K 548K 166960K 633 0 dirhash 12 2K 3K 166960K 375 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 18376 0 sigio 0 0K 0K 166960K 574 0 proc 68 83K 164K 166960K 4180 0 subproc 72 4K 4K 166960K 547 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 4158 0 in_multi 89 6K 7K 166960K 1388 0 ether_multi 1 0K 0K 166960K 277 0 mrt 1 0K 0K 166960K 102 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 4728 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 100 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 223 148K 189K 166960K 161242 0 UVM aobj 164 7K 8K 166960K 188 0 pinsyscall 37 74K 102K 166960K 20674 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 1095 0 NDP 16 0K 1K 166960K 715 0 temp 102 8648K 8904K 166960K 842263 0 kqueue 8 14K 35K 166960K 3475 0 SYN cache 2 0K 16K 166960K 4 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 2412 0 2411 21 20 1 3 0 8 0 rtentry 176 1048 0 951 6 1 5 5 0 8 0 unpcb 144 15680 0 15669 104 103 1 6 0 8 0 syncache 336 22 0 22 12 12 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 6406 0 6400 98 97 1 7 0 8 0 arp 128 164 0 145 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 21926 0 21915 220 216 4 12 0 8 2 nd6 144 182 0 164 1 0 1 1 0 8 0 pkpcb 40 203 0 203 35 34 1 1 0 8 1 kcovpl 48 60 0 52 1 0 1 1 0 8 0 mppekey 1024 11 0 11 8 8 0 1 0 8 0 ppxss 1192 810 0 809 15 14 1 1 0 8 0 pppxif 1504 201 0 201 33 32 1 1 0 8 1 pfstscr 40 9 0 8 2 1 1 1 0 8 0 pffrag 232 130 0 120 2 0 2 2 0 482 0 pffrnode 88 93 0 85 1 0 1 1 0 8 0 pffrent 40 502 0 492 2 1 1 2 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 10 0 10 10 10 0 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 4 0 0 1 0 1 1 0 8 0 pfstitem 24 1106 0 960 2 0 2 2 0 8 0 pfstkey 128 1120 0 972 8 2 6 6 0 8 0 pfstate 384 1111 0 968 27 8 19 19 0 8 0 pfrule 1344 38 0 32 2 1 1 2 0 8 0 rttmr 136 5 0 5 3 3 0 1 0 8 0 art_heap8 4096 6 0 2 6 2 4 5 0 8 0 art_heap4 256 3959 0 3543 63 36 27 31 0 8 0 art_table 40 3965 0 3545 5 0 5 5 0 8 0 art_node 32 1034 0 956 1 0 1 1 0 8 0 sysvmsgpl 40 27 0 21 2 1 1 1 0 8 0 semupl 112 3 0 3 3 3 0 1 0 8 0 semapl 112 557 0 537 1 0 1 1 0 8 0 shmpl 112 185 0 24 5 0 5 5 0 8 0 dirhash 1024 259 0 242 3 0 3 3 0 8 0 dino2pl 256 36631 0 34984 105 1 104 104 0 8 0 ffsino 296 36631 0 34984 130 2 128 128 0 8 0 nchpl 144 62193 0 61527 65 39 26 64 0 8 0 rtmask 32 107 0 107 26 25 1 1 0 8 1 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 233934 0 233934 31 28 3 3 0 8 3 percpumem 16 1080 0 1027 1 0 1 1 0 8 0 kstatmem 264 1188 0 1150 6 3 3 3 0 8 0 acpiwqpl 32 8 0 8 1 0 1 1 1 8 1 scsiplug 72 91 0 91 36 35 1 1 0 8 1 scxspl 216 444137 0 444137 44 41 3 7 1 8 3 plimitpl 152 4782 0 4766 1 0 1 1 0 8 0 sigapl 424 18463 0 18390 10 1 9 9 0 8 0 knotepl 120 1135 0 0 29 0 29 29 0 8 0 kqueuepl 224 7737 0 7728 69 66 3 9 0 8 1 pipepl 344 2900 0 2873 82 76 6 12 0 8 3 fdescpl 528 18343 0 18314 3 0 3 3 0 8 0 filepl 160 143199 0 142990 134 119 15 23 0 8 3 lockfpl 104 7323 0 7321 8 7 1 3 0 8 0 lockfspl 48 2419 0 2417 2 1 1 2 0 8 0 sessionpl 144 92 0 84 1 0 1 1 0 8 0 pgrppl 48 596 0 580 1 0 1 1 0 8 0 ucredpl 104 27080 0 27067 1 0 1 1 0 8 0 zombiepl 144 23398 0 23395 5 4 1 1 0 8 0 processpl 1248 18463 0 18390 6 0 6 6 0 8 0 procpl 664 48558 0 48478 12 4 8 9 0 8 0 sosppl 168 129 0 129 31 30 1 1 0 8 1 sockpl 752 41050 0 41027 394 386 8 25 0 8 4 mcl64k 65536 25 0 0 4 0 4 4 0 8 0 mcl16k 16384 13 0 0 2 0 2 2 0 8 0 mcl12k 12288 7 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 15 0 0 2 0 2 2 0 8 0 mcl4k 4096 117 0 0 14 0 14 14 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 216 0 0 15 4 11 12 0 8 0 mtagpl 96 8 0 0 1 0 1 1 0 8 0 mbufpl 256 3510 0 0 215 0 215 215 0 8 0 bufpl 280 183916 0 177773 440 0 440 440 0 8 0 anonpl 32 20251 0 0 159 0 159 159 0 246 0 amapchunkpl 152 602868 0 602286 254 223 31 53 0 158 2 amappl16 200 61939 0 61755 339 308 31 36 0 8 8 amappl15 192 7 0 7 2 2 0 1 0 8 0 amappl14 184 239 0 230 1 0 1 1 0 8 0 amappl13 176 18 0 18 6 6 0 1 0 8 0 amappl12 168 19875 0 19846 3 1 2 2 0 8 0 amappl11 160 55 0 46 1 0 1 1 0 8 0 amappl10 152 11 0 11 7 6 1 1 0 8 1 amappl9 144 253 0 252 2 1 1 1 0 8 0 amappl8 136 22 0 19 1 0 1 1 0 8 0 amappl7 128 236 0 226 1 0 1 1 0 8 0 amappl6 120 765 0 760 1 0 1 1 0 8 0 amappl5 112 357 0 349 1 0 1 1 0 8 0 amappl4 104 452 0 433 1 0 1 1 0 8 0 amappl3 96 122336 0 122226 4 0 4 4 0 8 0 amappl2 88 1493 0 1439 2 0 2 2 0 8 0 amappl1 80 85027 0 84522 16 2 14 15 0 8 0 amappl 88 156201 0 156034 5 0 5 5 0 92 0 dma65536 65536 2 0 2 2 2 0 1 0 8 0 dma32768 32768 8 0 8 7 7 0 1 0 8 0 dma16384 16384 6 0 6 6 6 0 1 0 8 0 dma8192 8192 3 0 3 2 2 0 1 0 8 0 dma4096 4096 4 0 4 4 4 0 1 0 8 0 dma2048 2048 3 0 3 2 2 0 1 0 8 0 dma1024 1024 72 0 71 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 20 0 20 11 11 0 1 0 8 0 dma128 128 279 0 279 21 21 0 1 0 8 0 dma64 64 20 0 20 12 12 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 31 0 30 1 0 1 1 0 8 0 aobjpl 72 187 0 24 4 0 4 4 0 8 0 uaddrrnd 24 18343 0 18314 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 18343 0 18314 1 0 1 1 0 8 0 vmmpekpl 168 119245 0 119171 4 0 4 4 0 8 0 vmmpepl 168 1129173 0 1127269 293 187 106 119 0 357 7 vmsppl 488 18342 0 18314 6 1 5 5 0 8 0 rwobjpl 80 273640 0 266584 166 11 155 157 0 8 1 pdppl 4096 36694 0 36628 254 188 66 86 0 8 0 pvpl 32 29594 0 0 235 3 232 232 0 265 0 pmappl 256 18342 0 18314 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 871 0 411 14 0 14 14 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83823ff0) 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(ffffffff839b2a60) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839b2a60) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff839b2a60) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839b2a60) 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: 0x74c947a38bc0, count: 4 ddb{0}> trace x86_ipi_db(ffffffff83823ff0) 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(ffffffff839b2a60) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839b2a60) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff839b2a60) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839b2a60) 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: 0x74c947a38bc0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x79fb9260eb00, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x79fb9260eb00, count: -1