uvm_fault(0xfffffd80683fb3e0, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff8212c730 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c4439c0 gsbase 0xffff8000299ddff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff8212c730 Starting stack trace... panic(ffffffff8333b44f) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c443910) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000148f000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80002a33b750) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002a33b750) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c443ac0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805ad57458,81,fffffd80097fb340,ffff80002a33b750) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806cac6d38,ffff80002a33b750) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806cac6d38,ffff80002a33b750) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806cac6d38,ffff80002a33b750) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806cac6d38,ffff80002a33b750) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80002a33b750) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80002a33b750,b,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80002a33b750,ffff80003c443e30,ffff80003c443d80) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c443e30) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c443e30) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7caa2bef87f0, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 83 769047920 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *131662 47052 0 0 0 1 syz-executor 29123 11997 0 0x14000 0x200 0 reaper savectx() at savectx+0xae end of kernel end trace frame: 0x702a6ed1e3b0, 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(0xfffffd80683fb3e0, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x702a6ed1e3b0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002f7dfd50 rbx 0 rdx 0 rcx 0xffff80003c43c028 rax 0x3a r8 0xffff80002f7dfc80 r9 0x1 r10 0xb9472eb3ae0615af r11 0xbcb9cb4100c91332 r12 0 r13 0 r14 0xffff80003c43c028 r15 0 rip 0xffffffff8152a3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002f7dfcd0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=131662 pid=47052 tcnt=3 stat=onproc flags process=0 proc=0 runpri=86, usrpri=84, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c43d9c8,0xffff80003c43d748 process=0xffff80002a3966d8 user=0xffff80002f7da000, vmspace=0xfffffd80683fb980 estcpu=34, cpticks=1, pctcpu=0.3, user=3, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 19875 78137 17268 0 2 0 syz-executor 19875 260039 17268 0 3 0x4000080 fsleep syz-executor *47052 131662 4764 0 7 0 syz-executor 47052 496030 4764 0 3 0x4000080 fsleep syz-executor 47052 274967 4764 0 2 0x4000000 syz-executor 27878 431271 94945 0 2 0x1 syz-executor 27878 121351 94945 0 2 0x4000000 syz-executor 35357 448525 93527 0 2 0 syz-executor 35357 39689 93527 0 3 0x4000080 fsleep syz-executor 35357 445906 93527 0 3 0x4000080 fsleep syz-executor 66442 257559 19764 0 2 0 syz-executor 66442 216674 19764 0 3 0x4000080 fsleep syz-executor 66442 253006 19764 0 3 0x4000080 fsleep syz-executor 20431 495951 66199 0 2 0 syz-executor 20431 518775 66199 0 3 0x4000080 fsleep syz-executor 20431 340264 66199 0 3 0x4000080 fsleep syz-executor 44911 235425 0 0 3 0x14200 acct acct 4764 512485 56364 0 3 0x82 nanoslp syz-executor 50707 228496 56364 0 3 0x82 nanoslp syz-executor 50478 303253 0 0 3 0x14200 bored sosplice 66199 275625 56364 0 3 0x82 nanoslp syz-executor 93527 233624 56364 0 3 0x82 nanoslp syz-executor 31035 156499 56364 0 2 0x2 syz-executor 19764 449525 56364 0 3 0x82 nanoslp syz-executor 94945 130333 56364 0 3 0x82 nanoslp syz-executor 17268 323120 56364 0 3 0x82 nanoslp syz-executor 56364 256452 79880 0 3 0x82 kqread syz-executor 79880 98625 22938 0 3 0x10008a sigsusp ksh 22938 52787 53324 0 3 0x98 kqread sshd-session 53324 507551 94356 0 3 0x92 kqread sshd-session 38096 330604 1 0 3 0x100083 ttyin getty 94356 498586 1 0 3 0x88 kqread sshd 95766 70730 39157 74 3 0x1100092 bpf pflogd 39157 35501 1 0 3 0x80 sbwait pflogd 32358 98668 30673 73 3 0x1100090 kqread syslogd 30673 172814 1 0 3 0x100082 sbwait syslogd 76436 460400 1 0 3 0x100080 kqread resolvd 75205 274774 81425 77 3 0x100092 kqread dhcpleased 90457 160367 81425 77 3 0x100092 kqread dhcpleased 81425 4659 1 0 3 0x80 kqread dhcpleased 69718 305140 0 0 3 0x14200 bored smr 21032 9665 0 0 2 0x14200 zerothread 62404 456647 0 0 3 0x14200 aiodoned aiodoned 18860 337214 0 0 3 0x14200 syncer update 13333 372034 0 0 3 0x14200 cleaner cleaner 11997 29123 0 0 7 0x14200 reaper 12165 142984 0 0 3 0x14200 pgdaemon pagedaemon 87018 116222 0 0 3 0x14200 bored viomb 61104 409739 0 0 3 0x40014200 acpi0 acpi0 73255 187852 0 0 3 0x40014200 idle1 96558 484163 0 0 3 0x14200 bored softnet3 38422 97313 0 0 3 0x14200 bored softnet2 27268 409623 0 0 3 0x14200 bored softnet1 80432 342286 0 0 3 0x14200 bored softnet0 28678 328002 0 0 2 0x40014200 systqmp 2186 432001 0 0 3 0x14200 bored systq 6819 474121 0 0 3 0x14200 tmoslp softclockmp 75924 226369 0 0 3 0x40014200 tmoslp softclock 33687 17132 0 0 3 0x40014200 idle0 1 248668 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &sched_lock r = 0 (0xffffffff83951ac8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:296 #2 mtx_enter+0x62 sys/kern/kern_lock.c:253 #3 wakeup_n+0x54 sys/kern/kern_synch.c:579 #4 uvm_pmr_freepageq+0x40d sys/uvm/uvm_pmemrange.c:1390 #5 km_free+0x36f sys/uvm/uvm_km.c:827 #6 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:285 #7 reaper+0x1cb sys/kern/kern_exit.c:493 #8 proc_trampoline+0x10 exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff839b5618) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:296 #2 mtx_enter+0x62 sys/kern/kern_lock.c:253 #3 uvm_pmr_freepageq+0x15c sys/uvm/uvm_pmemrange.c:1371 #4 km_free+0x36f sys/uvm/uvm_km.c:827 #5 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:285 #6 reaper+0x1cb sys/kern/kern_exit.c:493 #7 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10226 11137K 11504K 166960K 13331 0 pcb 19 16K 18K 166960K 369 0 rtable 184 8K 9K 166960K 727 0 pf 39 18K 20K 166960K 140 0 ifaddr 37 6K 7K 166960K 103 0 ifgroup 66 2K 3K 166960K 177 0 sysctl 3 1K 9K 166960K 25 0 counters 72 37K 38K 166960K 176 0 ioctlops 0 0K 4K 166960K 1731 0 iov 0 0K 16K 166960K 64 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1396 88K 88K 166960K 2801 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 33 0 VM map 2 1K 1K 166960K 2 0 sem 24 28K 28K 166960K 55 0 dirhash 12 2K 2K 166960K 51 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 89K 166960K 1533 0 sigio 2 0K 0K 166960K 23 0 proc 72 91K 140K 166960K 737 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 169 0 in_multi 74 5K 7K 166960K 165 0 ether_multi 1 0K 0K 166960K 18 0 mrt 2 0K 0K 166960K 8 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 555 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 250 168K 184K 166960K 15907 0 UVM aobj 131 7K 7K 166960K 136 0 pinsyscall 43 86K 100K 166960K 2693 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 78 0 NDP 14 0K 2K 166960K 68 0 temp 136 8695K 8821K 166960K 56243 0 kqueue 13 20K 30K 166960K 294 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 120 161 0 158 2 1 1 2 0 8 0 rtentry 176 226 0 149 6 0 6 6 0 8 0 unpcb 144 1044 0 1025 7 4 3 4 0 8 2 syncache 336 5 0 5 2 2 0 1 0 8 0 tcpcb 808 466 0 461 15 8 7 8 0 8 6 arp 128 27 0 15 1 0 1 1 0 8 0 inpcb 384 1861 0 1851 29 21 8 15 0 8 7 nd6 144 36 0 13 1 0 1 1 0 8 0 pkpcb 40 24 0 24 4 3 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1192 36 0 36 3 2 1 1 0 8 1 pppxif 1504 10 0 10 4 4 0 1 0 8 0 pffrag 232 5 0 1 1 0 1 1 0 482 0 pffrnode 88 4 0 0 1 0 1 1 0 8 0 pffrent 40 8 0 4 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 pfstitem 24 108 0 42 1 0 1 1 0 8 0 pfstkey 128 108 0 42 3 0 3 3 0 8 0 pfstate 384 108 0 42 7 0 7 7 0 8 0 pfrule 1344 21 0 15 2 0 2 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 662 0 280 32 5 27 29 0 8 2 art_table 32 664 0 280 4 0 4 4 0 8 0 art_node 16 160 0 92 1 0 1 1 0 8 0 sysvmsgpl 40 22 0 15 1 0 1 1 0 8 0 semapl 112 48 0 26 1 0 1 1 0 8 0 shmpl 112 133 0 5 4 0 4 4 0 8 0 dirhash 1024 43 0 26 3 0 3 3 0 8 0 dino2pl 256 4290 0 2784 95 0 95 95 0 8 0 ffsino 288 4290 0 2784 109 0 109 109 0 8 0 nchpl 144 6493 0 5957 63 39 24 63 0 8 0 rtmask 32 4 0 4 2 2 0 1 0 8 0 uvmvnodes 80 5227 0 0 107 0 107 107 0 8 0 vnodes 216 5227 0 0 291 0 291 291 0 8 0 namei 1024 24514 0 24514 4 3 1 3 0 8 1 percpumem 16 103 0 52 1 0 1 1 0 8 0 kstatmem 264 102 0 68 3 0 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 4 0 4 3 3 0 1 0 8 0 scxspl 216 18692 0 18692 9 8 1 8 1 8 1 plimitpl 152 200 0 182 1 0 1 1 0 8 0 sigapl 424 1861 0 1809 9 2 7 9 0 8 0 knotepl 120 853 0 0 25 0 25 25 0 8 0 kqueuepl 224 613 0 604 10 9 1 5 0 8 0 pipepl 336 295 0 268 8 0 8 8 0 8 5 fdescpl 520 1817 0 1785 3 0 3 3 0 8 0 filepl 160 11451 0 11235 26 8 18 18 0 8 7 lockfpl 104 367 0 365 1 0 1 1 0 8 0 lockfspl 48 161 0 159 1 0 1 1 0 8 0 sessionpl 144 26 0 17 1 0 1 1 0 8 0 pgrppl 48 61 0 43 1 0 1 1 0 8 0 ucredpl 104 1847 0 1833 1 0 1 1 0 8 0 zombiepl 144 2638 0 2637 1 0 1 1 0 8 0 processpl 1240 1861 0 1809 6 1 5 6 0 8 0 procpl 656 4378 0 4316 9 3 6 8 0 8 0 srpgc 96 6 0 6 2 1 1 1 0 8 1 sosppl 168 17 0 17 3 3 0 1 0 8 0 sockpl 728 3120 0 3088 30 20 10 16 0 8 7 mcl64k 65536 5 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 123 0 0 16 0 16 16 0 8 0 mcl2k 2048 158 0 0 20 0 20 20 0 8 0 mtagpl 96 167 0 0 5 0 5 5 0 8 0 mbufpl 256 1247 0 0 78 0 78 78 0 8 0 bufpl 280 5894 0 133 412 0 412 412 0 8 0 anonpl 32 8401 0 0 68 0 68 68 0 246 0 amapchunkpl 152 53765 0 53210 45 16 29 29 0 158 7 amappl16 200 4122 0 4082 33 30 3 15 0 8 0 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 123 0 111 1 0 1 1 0 8 0 amappl13 176 10 0 9 1 0 1 1 0 8 0 amappl12 168 2498 0 2467 3 1 2 2 0 8 0 amappl11 160 52 0 38 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 252 0 252 1 1 0 1 0 8 0 amappl8 136 28 0 25 1 0 1 1 0 8 0 amappl7 128 119 0 106 1 0 1 1 0 8 0 amappl6 120 211 0 207 1 0 1 1 0 8 0 amappl5 112 144 0 134 1 0 1 1 0 8 0 amappl4 104 348 0 326 1 0 1 1 0 8 0 amappl3 96 10959 0 10842 6 2 4 4 0 8 0 amappl2 88 683 0 621 2 0 2 2 0 8 0 amappl1 80 14441 0 13838 15 0 15 15 0 8 0 amappl 88 14914 0 14739 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma32768 32768 2 0 2 2 1 1 1 0 8 1 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 1 0 1 1 1 0 1 0 8 0 dma256 256 8 0 8 3 3 0 1 0 8 0 dma128 128 254 0 254 2 2 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 135 0 5 3 0 3 3 0 8 0 uaddrrnd 24 1816 0 1785 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1816 0 1785 1 0 1 1 0 8 0 vmmpekpl 168 16154 0 16103 3 0 3 3 0 8 0 vmmpepl 168 117192 0 115156 115 22 93 101 0 357 0 vmsppl 480 1815 0 1785 5 0 5 5 0 8 0 rwobjpl 72 35968 0 29645 117 2 115 115 0 8 0 pdppl 4096 3640 0 3570 123 51 72 84 0 8 2 pvpl 32 15191 0 0 125 2 123 123 0 265 0 pmappl 256 1815 0 1785 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 521 0 76 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837e5ff0) 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_release_all(ffffffff83a08e00) at __mp_release_all+0xe0 sys/kern/kern_lock.c:210 msleep_nsec(ffffffff8389bb08,ffffffff8389bad0,4,ffffffff833e8fa0,ffffffffffffffff) at msleep_nsec+0x1f3 sys/kern/kern_synch.c:-1 reaper(ffff8000ffffc7b8) at reaper+0x14b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: 9 ddb{0}> trace x86_ipi_db(ffffffff837e5ff0) 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_release_all(ffffffff83a08e00) at __mp_release_all+0xe0 sys/kern/kern_lock.c:210 msleep_nsec(ffffffff8389bb08,ffffffff8389bad0,4,ffffffff833e8fa0,ffffffffffffffff) at msleep_nsec+0x1f3 sys/kern/kern_synch.c:-1 reaper(ffff8000ffffc7b8) at reaper+0x14b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: -6 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x702a6ed1e3b0, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x702a6ed1e3b0, count: -1