uvm_fault(0xfffffd806b985d70, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff826259b8 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c445860 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff826259b8 Starting stack trace... panic(ffffffff833a05a7) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c4457b0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001480000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff80003c4542c8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c4542c8) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c445960) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806b529ea0,81,fffffd80097fb4e0,ffff80003c4542c8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8065529e30,ffff80003c4542c8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8065529e30,ffff80003c4542c8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8065529e30,ffff80003c4542c8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8065529e30,ffff80003c4542c8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c4542c8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c4542c8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c4542c8,ffff80003c445cd0,ffff80003c445c20) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c445cd0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c445cd0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7efcfa4098b0, 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 109094 19691 0 0 0 0 syz-executor * 51472 3064 0 0 0 1 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77822dd224e0, 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(0xfffffd806b985d70, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77822dd224e0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c47f720 rbx 0 rdx 0 rcx 0xffff80003c454a90 rax 0x2a r8 0xffff80003c47f650 r9 0x1 r10 0x23d0e052146cc817 r11 0x708680ef907eda16 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff825db4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c47f6a0 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=51472 pid=3064 tcnt=2 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=0xffff80003c4542c8,0xffff80003c454d38 process=0xffff80003a4249c0 user=0xffff80003c47a000, vmspace=0xfffffd806b9855d0 estcpu=36, cpticks=5, pctcpu=0.0, user=2, sys=3, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 19691 109094 66024 0 7 0 syz-executor 19691 3375 66024 0 2 0x4000000 syz-executor * 3064 51472 43609 0 7 0 syz-executor 3064 289156 43609 0 3 0x4000080 fsleep syz-executor 97574 245809 0 0 3 0x14200 acct acct 72173 210776 1957 0 2 0 syz-executor 72173 236527 1957 0 3 0x4000080 ttyout syz-executor 72173 56763 1957 0 3 0x4000080 fsleep syz-executor 5375 62579 0 0 3 0x14200 bored sosplice 68507 143832 23239 0 3 0x82 nanoslp syz-executor 80451 314051 23239 0 3 0x82 wait syz-executor 1957 188853 23239 0 3 0x82 nanoslp syz-executor 29741 420941 23239 0 3 0x82 nanoslp syz-executor 42674 93343 23239 0 3 0x82 nanoslp syz-executor 79575 208367 23239 0 3 0x2 biowait syz-executor 66024 31591 23239 0 3 0x82 nanoslp syz-executor 43609 387957 23239 0 3 0x82 nanoslp syz-executor 23239 110757 56440 0 3 0x82 kqread syz-executor 56440 274676 30558 0 3 0x10008a sigsusp ksh 30558 222499 5514 0 3 0x98 kqread sshd-session 5514 490856 90164 0 3 0x92 kqread sshd-session 20525 33475 1 0 3 0x100083 ttyin getty 90164 50788 1 0 3 0x88 kqread sshd 20125 303292 78436 74 3 0x1100092 bpf pflogd 78436 507677 1 0 3 0x80 sbwait pflogd 3879 67711 5086 73 3 0x1100090 kqread syslogd 5086 122587 1 0 3 0x100082 sbwait syslogd 48781 507509 1 0 3 0x100080 kqread resolvd 59724 148629 25611 77 3 0x100092 kqread dhcpleased 35618 452852 25611 77 3 0x100092 kqread dhcpleased 25611 107240 1 0 3 0x80 kqread dhcpleased 5526 492594 0 0 3 0x14200 bored smr 37204 392731 0 0 2 0x14200 zerothread 41779 37020 0 0 3 0x14200 aiodoned aiodoned 99407 51325 0 0 3 0x14200 syncer update 85775 323851 0 0 3 0x14200 cleaner cleaner 61160 253017 0 0 3 0x14200 reaper reaper 23096 239577 0 0 3 0x14200 pgdaemon pagedaemon 35117 52066 0 0 3 0x14200 bored viomb 19519 294095 0 0 3 0x40014200 acpi0 acpi0 17460 31952 0 0 3 0x40014200 idle1 42850 272721 0 0 3 0x14200 bored softnet7 43736 269451 0 0 3 0x14200 bored softnet6 93816 355424 0 0 3 0x14200 bored softnet5 49149 145356 0 0 3 0x14200 bored softnet4 26907 347453 0 0 3 0x14200 bored softnet3 98150 247223 0 0 3 0x14200 bored softnet2 49519 322066 0 0 3 0x14200 bored softnet1 65102 270657 0 0 3 0x14200 netlock softnet0 78940 500592 0 0 2 0x40014200 systqmp 64655 274115 0 0 3 0x14200 bored systq 62380 216507 0 0 3 0x14200 tmoslp softclockmp 13959 430979 0 0 3 0x40014200 tmoslp softclock 93443 27358 0 0 3 0x40014200 idle0 1 516345 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 79575 (syz-executor) thread 0xffff80002a2b9a08 (208367) exclusive rrwlock inode r = 0 (0xfffffd806e1ea6b8) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806cdd9320) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10216 11067K 11116K 166960K 11422 0 pcb 17 12K 12K 166960K 53 0 rtable 213 7K 7K 166960K 271 0 pf 36 17K 18K 166960K 71 0 ifaddr 44 7K 7K 166960K 61 0 ifgroup 57 2K 2K 166960K 89 0 sysctl 2 1K 9K 166960K 6 0 counters 72 37K 37K 166960K 104 0 ioctlops 0 0K 4K 166960K 1508 0 iov 0 0K 24K 166960K 15 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1339 84K 84K 166960K 1489 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 11 0K 0K 166960K 18 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 310 0 sigio 0 0K 0K 166960K 3 0 proc 72 115K 164K 166960K 552 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 0 0K 0K 166960K 17 0 in_multi 99 7K 7K 166960K 104 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 384 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 239 159K 172K 166960K 4550 0 UVM aobj 13 4K 4K 166960K 15 0 pinsyscall 42 84K 102K 166960K 1398 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 5 0 NDP 13 0K 2K 166960K 39 0 temp 43 8644K 8710K 166960K 5441 0 kqueue 16 24K 28K 166960K 61 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 43 0 40 1 0 1 1 0 8 0 rtentry 176 99 0 4 5 0 5 5 0 8 0 unpcb 144 253 0 233 6 0 6 6 0 8 5 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 55 0 50 2 0 2 2 0 8 1 arp 128 11 0 0 1 0 1 1 0 8 0 inpcb 328 204 0 195 2 0 2 2 0 8 0 nd6 144 16 0 0 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1192 14 0 12 1 0 1 1 0 8 0 pppxif 1504 3 0 3 1 0 1 1 0 8 1 pffrag 232 1 0 1 1 0 1 1 0 482 1 pffrnode 88 1 0 1 1 0 1 1 0 8 1 pffrent 40 2 0 2 1 0 1 1 0 8 1 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 27 0 0 1 0 1 1 0 8 0 pfstkey 128 27 0 0 1 0 1 1 0 8 0 pfstate 384 27 0 0 3 0 3 3 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 456 0 18 29 0 29 29 0 8 1 art_table 40 457 0 18 5 0 5 5 0 8 0 art_node 32 99 0 14 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 6 1 0 1 1 0 8 0 semapl 112 13 0 4 1 0 1 1 0 8 0 shmpl 112 12 0 2 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1931 0 421 95 0 95 95 0 8 0 ffsino 296 1931 0 421 117 0 117 117 0 8 0 nchpl 144 2345 0 651 63 0 63 63 0 8 0 rtmask 32 3 0 2 1 0 1 1 0 8 0 uvmvnodes 80 2060 0 0 43 0 43 43 0 8 0 vnodes 216 2060 0 0 115 0 115 115 0 8 0 namei 1024 7350 0 7349 1 0 1 1 0 8 0 percpumem 16 67 0 16 1 0 1 1 0 8 0 kstatmem 264 48 0 20 3 0 3 3 0 8 1 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 10095 0 10094 3 2 1 2 1 8 0 plimitpl 152 54 0 35 1 0 1 1 0 8 0 sigapl 424 616 0 561 7 0 7 7 0 8 0 knotepl 120 313 0 0 10 0 10 10 0 8 0 kqueuepl 224 122 0 110 3 0 3 3 0 8 2 pipepl 344 112 0 83 3 0 3 3 0 8 0 fdescpl 528 592 0 561 3 0 3 3 0 8 0 filepl 160 2649 0 2415 15 0 15 15 0 8 4 lockfpl 104 74 0 72 1 0 1 1 0 8 0 lockfspl 48 32 0 30 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 34 0 17 1 0 1 1 0 8 0 ucredpl 104 405 0 391 1 0 1 1 0 8 0 zombiepl 144 565 0 561 1 0 1 1 0 8 0 processpl 1232 616 0 561 5 0 5 5 0 8 0 procpl 664 944 0 885 7 0 7 7 0 8 0 sosppl 168 4 0 4 1 0 1 1 0 8 1 sockpl 752 508 0 476 17 3 14 17 0 8 9 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 238 0 0 15 0 15 15 0 8 0 bufpl 280 4278 0 122 297 0 297 297 0 8 0 anonpl 32 7314 0 0 59 0 59 59 0 246 0 amapchunkpl 152 13775 0 13273 29 3 26 26 0 158 2 amappl16 200 2320 0 2292 13 2 11 11 0 8 6 amappl15 192 5 0 4 1 0 1 1 0 8 0 amappl14 184 119 0 107 1 0 1 1 0 8 0 amappl13 176 8 0 8 1 1 0 1 0 8 0 amappl12 168 1262 0 1231 3 1 2 2 0 8 0 amappl11 160 100 0 86 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 22 0 20 1 0 1 1 0 8 0 amappl7 128 105 0 93 1 0 1 1 0 8 0 amappl6 120 203 0 199 1 0 1 1 0 8 0 amappl5 112 125 0 116 1 0 1 1 0 8 0 amappl4 104 305 0 286 1 0 1 1 0 8 0 amappl3 96 2432 0 2315 5 1 4 4 0 8 0 amappl2 88 653 0 590 2 0 2 2 0 8 0 amappl1 80 9300 0 8702 15 0 15 15 0 8 0 amappl 88 3847 0 3680 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 dma512 512 1 0 1 1 0 1 1 0 8 1 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 1 1 1 0 8 1 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 14 0 2 1 0 1 1 0 8 0 uaddrrnd 24 592 0 561 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 592 0 561 1 0 1 1 0 8 0 vmmpekpl 168 6590 0 6547 2 0 2 2 0 8 0 vmmpepl 168 44332 0 42358 96 0 96 96 0 357 3 vmsppl 488 591 0 561 5 0 5 5 0 8 0 rwobjpl 80 17098 0 14094 63 0 63 63 0 8 0 pdppl 4096 1191 0 1122 97 24 73 83 0 8 4 pvpl 32 15086 0 0 122 0 122 122 0 265 0 pmappl 256 591 0 561 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 273 0 26 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8381bff0) 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(ffffffff8387c130) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8387c130) 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(ffffffff8387c130) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8387c130) at __mp_lock+0x199 sys/kern/kern_lock.c:165 intr_handler(ffff80003a41b850,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7c9f681997f0, count: 5 ddb{0}> trace x86_ipi_db(ffffffff8381bff0) 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(ffffffff8387c130) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8387c130) 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(ffffffff8387c130) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8387c130) at __mp_lock+0x199 sys/kern/kern_lock.c:165 intr_handler(ffff80003a41b850,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7c9f681997f0, count: -10 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: 0x77822dd224e0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77822dd224e0, count: -1