uvm_fault(0xfffffd806bec15b8, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82ef4da0 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff8000353f9b70 gsbase 0xffff8000299ddff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82ef4da0 Starting stack trace... panic(ffffffff8333a5e4) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff8000353f9ac0) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000149e000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(21e5f,81,2000,ffff8000ffff0a60) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff8000ffff0a60) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff8000353f9c70) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806b5d3c30,81,fffffd807f7d3618,ffff8000ffff0a60) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b64a5e8,ffff8000ffff0a60) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b64a5e8,ffff8000ffff0a60) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806b64a5e8,ffff8000ffff0a60) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806b64a5e8,ffff8000ffff0a60) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff8000ffff0a60) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff8000ffff0a60,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff8000ffff0a60,ffff8000353f9fe0,ffff8000353f9f30) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000353f9fe0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000353f9fe0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75069428c1a0, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 83 1919753232 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *322111 59397 0 0 0 1 syz-executor 390869 79779 0 0x2 0x1 0 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x73568e4baae0, 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(0xfffffd806bec15b8, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x73568e4baae0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000323e2ae0 rbx 0 rdx 0 rcx 0xffff8000ffff19c0 rax 0x3b r8 0xffff8000323e2a10 r9 0x1 r10 0x56c6ecd534ff47d3 r11 0x1f819287bdc7fa2e r12 0 r13 0 r14 0xffff8000ffff19c0 r15 0 rip 0xffffffff814623ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff8000323e2a60 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=322111 pid=59397 tcnt=3 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=0xffff8000ffff1c50,0xffff8000ffff0030 process=0xffff80003a4157b8 user=0xffff8000323dd000, vmspace=0xfffffd806ebe4968 estcpu=36, cpticks=3, pctcpu=0.0, user=2, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 22893 272419 79779 0 2 0 syz-executor 22893 26927 79779 0 3 0x4000080 fsleep syz-executor *59397 322111 59756 0 7 0 syz-executor 59397 36677 59756 0 3 0x4000080 fsleep syz-executor 59397 242579 59756 0 3 0x4000080 fsleep syz-executor 47266 391244 91109 0 2 0 syz-executor 47266 314875 91109 0 3 0x4000080 fsleep syz-executor 94871 518188 8888 0 2 0 syz-executor 94871 319755 8888 0 3 0x4000080 kqread syz-executor 94871 143147 8888 0 2 0x4000000 syz-executor 11293 481572 11092 0 2 0 syz-executor 11293 119596 11092 0 2 0x4000000 syz-executor 54784 207345 84913 0 2 0xc80 syz-executor 54784 281872 84913 0 3 0x4000080 fsleep syz-executor 54784 70769 84913 0 2 0x4000000 syz-executor 54784 280619 84913 0 3 0x4000080 fsleep syz-executor 35432 112967 0 0 3 0x14200 acct acct 18657 246253 0 0 3 0x14200 bored sosplice 25351 169013 70266 0 2 0xc82 syz-executor 8888 503231 70266 0 2 0xc82 syz-executor 79779 390869 70266 0 7 0x3 syz-executor 59756 116925 70266 0 2 0xc82 syz-executor 11092 40305 70266 0 2 0xc82 syz-executor 5789 39542 70266 0 3 0x82 wait syz-executor 84913 114849 70266 0 2 0xc82 syz-executor 91109 69441 70266 0 2 0xc82 syz-executor 70266 456486 9403 0 3 0x82 kqread syz-executor 9403 237445 52814 0 3 0x10008a sigsusp ksh 52814 158498 13763 0 3 0x98 kqread sshd-session 13763 183463 86351 0 3 0x92 kqread sshd-session 43765 475818 1 0 2 0x100083 getty 86351 299369 1 0 3 0x88 kqread sshd 20543 209689 86778 74 3 0x1100092 bpf pflogd 86778 520960 1 0 3 0x80 sbwait pflogd 7025 165418 99408 73 3 0x1100090 kqread syslogd 99408 312264 1 0 3 0x100082 sbwait syslogd 46587 351735 1 0 3 0x100080 kqread resolvd 34902 514513 57188 77 3 0x100092 kqread dhcpleased 60430 51630 57188 77 3 0x100092 kqread dhcpleased 57188 36953 1 0 3 0x80 kqread dhcpleased 53313 504656 0 0 2 0x14200 smr 89246 137044 0 0 2 0x14200 zerothread 56781 97533 0 0 3 0x14200 aiodoned aiodoned 20681 332920 0 0 3 0x14200 syncer update 78029 460914 0 0 3 0x14200 cleaner cleaner 19097 466801 0 0 3 0x14200 reaper reaper 24820 1567 0 0 3 0x14200 pgdaemon pagedaemon 62248 375611 0 0 3 0x14200 bored viomb 61024 227216 0 0 3 0x40014200 acpi0 acpi0 59936 117368 0 0 3 0x40014200 idle1 60462 68694 0 0 3 0x14200 bored softnet3 42373 97361 0 0 3 0x14200 bored softnet2 71906 497660 0 0 3 0x14200 bored softnet1 99078 94957 0 0 3 0x14200 netlock softnet0 83126 104256 0 0 2 0x40014200 systqmp 86769 492005 0 0 3 0x14200 bored systq 49608 138577 0 0 3 0x14200 netlock softclockmp 67594 220113 0 0 3 0x40014200 tmoslp softclock 2634 167471 0 0 3 0x40014200 idle0 1 517660 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 94871 (syz-executor) thread 0xffff8000ffff0540 (143147) exclusive rrwlock inode r = 0 (0xfffffd806bab8520) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x367 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:606 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 dorenameat+0x91 sys/kern/vfs_syscalls.c:2986 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10220 11210K 11278K 166960K 11541 0 pcb 17 14K 16K 166960K 120 0 rtable 240 8K 8K 166960K 358 0 pf 36 17K 21K 166960K 67 0 ifaddr 44 7K 7K 166960K 54 0 ifgroup 57 2K 2K 166960K 75 0 sysctl 3 1K 9K 166960K 7 0 counters 70 37K 37K 166960K 94 0 ioctlops 0 0K 4K 166960K 1574 0 iov 0 0K 16K 166960K 9 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1348 85K 85K 166960K 1522 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 7 0K 0K 166960K 10 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 85K 166960K 331 0 sigio 0 0K 0K 166960K 1 0 proc 72 91K 128K 166960K 554 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 24 0 in_multi 99 7K 7K 166960K 102 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 376 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 262 176K 181K 166960K 4717 0 UVM aobj 6 2K 2K 166960K 7 0 pinsyscall 43 86K 100K 166960K 1414 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 13 0 NDP 13 0K 2K 166960K 35 0 temp 45 8672K 8738K 166960K 11151 0 kqueue 16 26K 30K 166960K 72 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 46 0 43 1 0 1 1 0 8 0 rtentry 176 112 0 2 6 0 6 6 0 8 0 unpcb 144 117 0 98 1 0 1 1 0 8 0 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 808 48 0 43 1 0 1 1 0 8 0 arp 128 18 0 0 1 0 1 1 0 8 0 inpcb 384 304 0 294 9 7 2 9 0 8 1 nd6 144 24 0 0 1 0 1 1 0 8 0 pkpcb 40 5 0 5 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 11 0 10 3 2 1 1 0 8 0 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 1 0 0 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 34 0 0 1 0 1 1 0 8 0 pfstkey 128 34 0 0 2 0 2 2 0 8 0 pfstate 384 34 0 0 4 0 4 4 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 484 0 31 31 2 29 31 0 8 0 art_table 32 485 0 31 4 0 4 4 0 8 0 art_node 16 111 0 11 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 2 2 0 1 0 8 0 semapl 112 8 0 3 1 0 1 1 0 8 0 shmpl 112 4 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1934 0 424 96 0 96 96 0 8 0 ffsino 288 1934 0 424 109 0 109 109 0 8 0 nchpl 144 2404 0 712 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 uvmvnodes 80 2113 0 0 44 0 44 44 0 8 0 vnodes 216 2113 0 0 118 0 118 118 0 8 0 namei 1024 7657 0 7656 2 1 1 1 0 8 0 percpumem 16 62 0 12 1 0 1 1 0 8 0 kstatmem 264 40 0 12 2 0 2 2 0 8 0 scxspl 216 7537 0 7537 3 2 1 2 1 8 1 plimitpl 152 80 0 62 1 0 1 1 0 8 0 sigapl 424 632 0 580 7 1 6 7 0 8 0 knotepl 120 549 0 0 17 0 17 17 0 8 0 kqueuepl 224 93 0 80 3 1 2 2 0 8 1 pipepl 336 116 0 88 3 0 3 3 0 8 0 fdescpl 520 612 0 580 3 0 3 3 0 8 0 filepl 160 2649 0 2416 14 3 11 14 0 8 0 lockfpl 104 66 0 63 1 0 1 1 0 8 0 lockfspl 48 28 0 25 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 34 0 17 1 0 1 1 0 8 0 ucredpl 104 265 0 252 1 0 1 1 0 8 0 zombiepl 144 634 0 632 1 0 1 1 0 8 0 processpl 1208 632 0 580 5 0 5 5 0 8 0 procpl 656 998 0 936 6 0 6 6 0 8 0 srpgc 96 1 0 1 1 1 0 1 0 8 0 sosppl 168 2 0 2 2 1 1 1 0 8 1 sockpl 728 475 0 443 11 7 4 10 0 8 0 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 122 0 0 16 0 16 16 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mtagpl 96 11 0 0 1 0 1 1 0 8 0 mbufpl 256 286 0 0 18 0 18 18 0 8 0 bufpl 280 3681 0 123 255 0 255 255 0 8 0 anonpl 32 7577 0 0 62 0 62 62 0 246 0 amapchunkpl 152 14404 0 13847 29 3 26 26 0 158 4 amappl16 200 2065 0 2037 17 14 3 14 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 112 0 100 1 0 1 1 0 8 0 amappl13 176 8 0 8 1 1 0 1 0 8 0 amappl12 168 1280 0 1248 3 1 2 2 0 8 0 amappl11 160 49 0 35 1 0 1 1 0 8 0 amappl10 152 9 0 7 1 0 1 1 0 8 0 amappl9 144 254 0 254 1 1 0 1 0 8 0 amappl8 136 34 0 32 1 0 1 1 0 8 0 amappl7 128 113 0 101 1 0 1 1 0 8 0 amappl6 120 173 0 170 1 0 1 1 0 8 0 amappl5 112 125 0 115 1 0 1 1 0 8 0 amappl4 104 317 0 295 1 0 1 1 0 8 0 amappl3 96 2608 0 2481 5 1 4 4 0 8 0 amappl2 88 634 0 574 2 0 2 2 0 8 0 amappl1 80 9109 0 8495 15 1 14 15 0 8 0 amappl 88 4005 0 3819 5 0 5 5 0 92 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 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 6 0 1 1 0 1 1 0 8 0 uaddrrnd 24 612 0 580 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 612 0 580 1 0 1 1 0 8 0 vmmpekpl 168 6787 0 6745 3 0 3 3 0 8 0 vmmpepl 168 44974 0 42935 100 7 93 98 0 357 2 vmsppl 480 611 0 580 5 1 4 5 0 8 0 rwobjpl 72 16824 0 13741 59 2 57 57 0 8 0 pdppl 4096 1232 0 1160 98 26 72 82 0 8 0 pvpl 32 14971 0 0 122 1 121 122 0 265 0 pmappl 256 611 0 580 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 390 0 32 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83827ff0) 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(ffffffff839049d8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839049d8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 ktrsysret(ffff8000ffffcf68,5b,0,ffff80002a394a70) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff8000ffffcf68,5b,0,ffff80002a394a70) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff80002a394b20) at syscall+0xa43 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a394b20) at syscall+0xa43 sys/arch/amd64/amd64/trap.c:600 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cdb90e5db00, count: 8 ddb{0}> trace x86_ipi_db(ffffffff83827ff0) 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(ffffffff839049d8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839049d8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 ktrsysret(ffff8000ffffcf68,5b,0,ffff80002a394a70) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff8000ffffcf68,5b,0,ffff80002a394a70) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff80002a394b20) at syscall+0xa43 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a394b20) at syscall+0xa43 sys/arch/amd64/amd64/trap.c:600 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cdb90e5db00, count: -7 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x73568e4baae0, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x73568e4baae0, count: -1