uvm_fault(0xfffffd800b0273d0, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82fe3248 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003b413470 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82fe3248 Starting stack trace... panic(ffffffff833b9c04) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003b4133c0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000168b000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80002b3d47f8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002b3d47f8) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003b413570) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80629f6988,81,fffffd80097fb5b0,ffff80002b3d47f8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c1dc538,ffff80002b3d47f8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c1dc538,ffff80002b3d47f8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c1dc538,ffff80002b3d47f8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c1dc538,ffff80002b3d47f8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80002b3d47f8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80002b3d47f8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002b3d47f8,ffff80003b4138e0,ffff80003b413830) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003b4138e0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003b4138e0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7eada099bd10, 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 238742 20101 0 0 0 0 syz-executor *209517 68529 0 0 0 1 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x74f20332ba50, 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(0xfffffd800b0273d0, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x74f20332ba50, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a33a7c0 rbx 0 rdx 0 rcx 0xffff8000fffef770 rax 0x2a r8 0xffff80002a33a6f0 r9 0x1 r10 0xb4d3e4fb37f51e35 r11 0x81549535c75c4ea6 r12 0 r13 0xffffffff8291b8f8 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff813db4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a33a740 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=209517 pid=68529 tcnt=3 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffee7e0,0xffff8000fffef250 process=0xffff80002b437048 user=0xffff80002a335000, vmspace=0xfffffd806bffe020 estcpu=36, cpticks=15, pctcpu=0.0, user=14, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 20101 238742 49005 0 7 0 syz-executor 20101 424387 49005 0 3 0x4000080 fsleep syz-executor 19729 487619 72906 0 2 0 syz-executor 19729 100587 72906 0 3 0x4000080 fsleep syz-executor *68529 209517 98769 0 7 0 syz-executor 68529 55640 98769 0 2 0x4000000 syz-executor 68529 396237 98769 0 3 0x4000080 fsleep syz-executor 25605 340560 49239 0 2 0 syz-executor 25605 86536 49239 0 3 0x4000080 kqsel syz-executor 25605 160631 49239 0 3 0x4000080 kqsel syz-executor 25605 390393 49239 0 2 0x4000000 syz-executor 50002 263567 98109 0 3 0x80 nanoslp syz-executor 50002 174676 98109 0 3 0x4000080 ttyin syz-executor 50002 298759 98109 0 3 0x4000080 sbwait syz-executor 50002 183632 98109 0 3 0x4000080 fsleep syz-executor 98769 224626 82792 0 3 0x82 nanoslp syz-executor 49239 103239 82792 0 3 0x82 nanoslp syz-executor 74630 9182 0 0 3 0x14200 acct acct 98109 456190 82792 0 3 0x82 nanoslp syz-executor 49005 39245 82792 0 3 0x82 nanoslp syz-executor 53914 69081 82792 0 3 0x82 wait syz-executor 72906 2704 82792 0 3 0x82 nanoslp syz-executor 70599 179575 82792 0 3 0x82 wait syz-executor 7025 186477 82792 0 3 0x82 nanoslp syz-executor 35391 6297 1 0 3 0x100083 ttyin getty 82792 106741 3806 0 3 0x82 kqread syz-executor 3806 517835 58354 0 3 0x10008a sigsusp ksh 58354 438680 64425 0 3 0x98 kqread sshd-session 64425 427445 31116 0 3 0x92 kqread sshd-session 31116 77489 1 0 3 0x88 kqread sshd 80023 380397 68493 74 3 0x1100092 bpf pflogd 68493 385897 1 0 3 0x80 sbwait pflogd 17730 265916 56529 73 3 0x1100090 kqread syslogd 56529 383495 1 0 3 0x100082 sbwait syslogd 53053 420525 1 0 3 0x100080 kqread resolvd 5195 375411 9762 77 3 0x100092 kqread dhcpleased 77748 413642 9762 77 3 0x100092 kqread dhcpleased 9762 512774 1 0 3 0x80 kqread dhcpleased 75567 284151 0 0 3 0x14200 bored smr 93709 517274 0 0 2 0x14200 zerothread 38063 514228 0 0 3 0x14200 aiodoned aiodoned 36381 150757 0 0 3 0x14200 syncer update 88108 459178 0 0 3 0x14200 cleaner cleaner 76825 472157 0 0 3 0x14200 reaper reaper 61149 203059 0 0 3 0x14200 pgdaemon pagedaemon 35114 209372 0 0 3 0x14200 bored viomb 72266 309637 0 0 3 0x40014200 acpi0 acpi0 92777 488090 0 0 3 0x40014200 idle1 2898 53853 0 0 3 0x14200 bored softnet1 62868 333536 0 0 2 0x14200 softnet0 91042 467638 0 0 2 0x14200 systqmp 86537 415025 0 0 3 0x14200 bored systq 28411 306120 0 0 3 0x14200 tmoslp softclockmp 56274 298327 0 0 3 0x40014200 tmoslp softclock 23017 269175 0 0 3 0x40014200 idle0 1 520079 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 25605 (syz-executor) thread 0xffff80002b3d4030 (390393) exclusive rwlock vmmaplk r = 0 (0xfffffd806bffeaa8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5171 #3 sys_munmap+0x1ca sys/uvm/uvm_mmap.c:531 #4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #5 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10273 11104K 12376K 166960K 14808 0 pcb 18 20K 24K 166960K 1192 0 rtable 245 15K 16K 166960K 1879 0 pf 43 19K 67487K 166960K 624 0 ifaddr 41 8K 10K 166960K 405 0 ifgroup 64 2K 3K 166960K 736 0 sysctl 4 1K 9K 166960K 130 0 counters 72 37K 38K 166960K 1036 0 ioctlops 0 0K 4K 166960K 2804 0 iov 0 0K 28K 166960K 425 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1453 91K 92K 166960K 5624 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 620K 728K 166960K 129 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 692 0 dirhash 12 2K 3K 166960K 117 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 236K 166960K 5923 0 sigio 0 0K 0K 166960K 193 0 proc 74 115K 180K 166960K 1741 0 subproc 72 4K 4K 166960K 258 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 896 0 in_multi 77 5K 7K 166960K 534 0 ether_multi 1 0K 0K 166960K 87 0 mrt 1 0K 0K 166960K 54 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 343 1526K 1526K 166960K 343 0 exec 0 0K 1K 166960K 1530 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 280 162K 183K 166960K 55197 0 UVM aobj 95 3K 3K 166960K 95 0 pinsyscall 43 86K 98K 166960K 7546 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 322 0 NDP 16 0K 1K 166960K 310 0 temp 88 8662K 8788K 166960K 265827 0 kqueue 15 24K 36K 166960K 1140 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 120 803 0 799 8 7 1 3 0 8 0 rtentry 176 566 0 479 6 1 5 6 0 8 0 unpcb 144 4545 0 4520 32 31 1 5 0 8 0 syncache 336 18 0 18 13 13 0 1 0 8 0 tcpqe 32 5 13 5 2 2 0 1 0 8 0 tcpcb 736 1899 0 1893 35 34 1 9 0 8 0 arp 136 108 0 91 1 0 1 1 0 8 0 inpcb 328 6565 0 6554 87 83 4 22 0 8 2 nd6 152 96 0 77 2 0 2 2 0 8 0 pkpcb 40 115 0 115 16 16 0 2 0 8 0 kcovpl 48 28 0 20 1 0 1 1 0 8 0 mppekey 1024 5 0 5 5 5 0 1 0 8 0 ppxss 1192 403 0 403 7 7 0 1 0 8 0 pppxif 1504 37 0 37 9 9 0 1 0 8 0 pffrag 232 55 0 47 1 0 1 1 0 482 0 pffrnode 88 45 0 39 1 0 1 1 0 8 0 pffrent 40 122 0 114 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 6 0 5 1 0 1 1 0 8 0 pfstitem 24 64 0 56 1 0 1 1 0 8 0 pfstkey 128 64 0 56 2 0 2 2 0 8 0 pfstate 384 63 0 56 4 2 2 4 0 8 0 pfsrctr 152 275 0 266 1 0 1 1 0 8 0 pfrule 1344 24 0 18 2 1 1 2 0 8 0 rttmr 136 6 0 6 6 5 1 1 0 8 1 art_heap8 4096 8 0 4 7 3 4 5 0 8 0 art_heap4 256 2134 0 1759 48 19 29 33 0 8 0 art_table 40 2142 0 1763 6 0 6 6 0 8 0 art_node 32 556 0 480 2 0 2 2 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semupl 112 5 0 5 4 4 0 1 0 8 0 semapl 112 675 0 665 1 0 1 1 0 8 0 shmpl 112 92 0 0 3 0 3 3 0 8 0 dirhash 1024 88 0 71 3 0 3 3 0 8 0 dino2pl 256 12954 0 11407 98 1 97 98 0 8 0 ffsino 296 12954 0 11407 122 2 120 120 0 8 0 nchpl 144 20889 0 19135 66 0 66 66 0 8 0 rtmask 32 33 0 33 11 11 0 1 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 77577 0 77577 6 5 1 2 0 8 1 percpumem 16 533 0 482 1 0 1 1 0 8 0 kstatmem 264 514 0 480 4 1 3 3 0 8 0 scsiplug 72 18 0 18 11 10 1 1 0 8 1 scxspl 216 109105 0 109105 25 24 1 8 1 8 1 plimitpl 152 1518 0 1500 1 0 1 1 0 8 0 sigapl 424 6177 0 6128 7 0 7 7 0 8 0 knotepl 120 1010 0 0 25 0 25 25 0 8 0 kqueuepl 224 2298 0 2284 30 29 1 5 0 8 0 pipepl 344 941 0 913 23 19 4 9 0 8 0 fdescpl 528 6145 0 6113 3 0 3 3 0 8 0 filepl 160 46864 0 46624 68 55 13 21 0 8 0 lockfpl 104 2410 0 2406 4 3 1 2 0 8 0 lockfspl 48 787 0 783 1 0 1 1 0 8 0 sessionpl 144 45 0 36 1 0 1 1 0 8 0 pgrppl 48 195 0 178 1 0 1 1 0 8 0 ucredpl 104 9314 0 9301 1 0 1 1 0 8 0 zombiepl 144 8832 0 8829 3 2 1 1 0 8 0 processpl 1232 6177 0 6128 6 1 5 5 0 8 0 procpl 664 16068 0 16009 7 0 7 7 0 8 0 sosppl 176 28 0 28 11 11 0 1 0 8 0 sockpl 752 12283 0 12243 141 134 7 29 0 8 3 mcl64k 65536 32 0 0 4 0 4 4 0 8 0 mcl16k 16384 6 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 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 1 14 15 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 93 0 0 7 0 7 7 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 1386 0 0 74 0 74 74 0 8 0 bufpl 280 39378 0 33241 439 0 439 439 0 8 0 anonpl 32 18803 0 0 150 0 150 150 0 246 0 amapchunkpl 152 197703 0 196999 116 84 32 39 0 158 1 amappl16 200 18434 0 18162 119 92 27 38 0 8 1 amappl15 192 9 0 9 4 4 0 1 0 8 0 amappl14 184 26 0 26 2 2 0 1 0 8 0 amappl13 176 670 0 668 1 0 1 1 0 8 0 amappl12 168 6628 0 6585 3 0 3 3 0 8 0 amappl11 160 7 0 5 2 1 1 1 0 8 0 amappl10 152 52 0 37 1 0 1 1 0 8 0 amappl9 144 268 0 268 1 1 0 1 0 8 0 amappl8 136 29 0 25 1 0 1 1 0 8 0 amappl7 128 164 0 162 1 0 1 1 0 8 0 amappl6 120 546 0 532 1 0 1 1 0 8 0 amappl5 112 82 0 71 1 0 1 1 0 8 0 amappl4 104 528 0 497 1 0 1 1 0 8 0 amappl3 96 34784 0 34677 4 1 3 3 0 8 0 amappl2 88 6200 0 6121 2 0 2 2 0 8 0 amappl1 80 33938 0 33340 14 1 13 14 0 8 0 amappl 88 53163 0 52963 6 1 5 5 0 92 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 dma32768 32768 66 0 66 2 2 0 1 0 8 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma8192 8192 3 0 3 2 2 0 1 0 8 0 dma4096 4096 3 0 3 2 2 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 11 0 11 4 4 0 1 0 8 0 dma128 128 256 0 256 4 4 0 1 0 8 0 dma64 64 12 0 12 5 5 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 21 0 20 1 0 1 1 0 8 0 aobjpl 72 94 0 0 2 0 2 2 0 8 0 uaddrrnd 24 6145 0 6113 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6145 0 6113 1 0 1 1 0 8 0 vmmpekpl 168 42635 0 42561 4 0 4 4 0 8 0 vmmpepl 168 385356 0 383075 178 68 110 119 0 357 1 vmsppl 488 6144 0 6113 6 1 5 5 0 8 0 rwobjpl 80 99544 0 92304 170 13 157 157 0 8 0 pdppl 4096 12298 0 12226 152 78 74 82 0 8 2 pvpl 32 26295 0 0 210 0 210 210 0 265 0 pmappl 256 6144 0 6113 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 484 0 170 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837dbff0) 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(ffffffff838e3550) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838e3550) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a323ca0,ffff80000006ac00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x38 sys/dev/kcov.c:-1 __mp_lock(ffffffff838e3550) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838e3550) at __mp_lock+0x1a3 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 __mp_lock(ffffffff838e3550) at __mp_lock+0x19e __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838e3550) at __mp_lock+0x19e sys/kern/kern_lock.c:165 syscall(ffff80002a324010) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80002a324010) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x739669888d10, count: 1 ddb{0}> trace x86_ipi_db(ffffffff837dbff0) 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(ffffffff838e3550) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838e3550) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a323ca0,ffff80000006ac00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x38 sys/dev/kcov.c:-1 __mp_lock(ffffffff838e3550) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838e3550) at __mp_lock+0x1a3 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 __mp_lock(ffffffff838e3550) at __mp_lock+0x19e __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838e3550) at __mp_lock+0x19e sys/kern/kern_lock.c:165 syscall(ffff80002a324010) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80002a324010) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x739669888d10, count: -14 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: 0x74f20332ba50, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x74f20332ba50, count: -1