uvm_fault(0xfffffd806b266d78, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81577d98 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80002a342b50 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81577d98 Starting stack trace... panic(ffffffff833a20e5) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a342aa0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001482000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff80002a3f4568) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002a3f4568) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a342c50) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806bee67d8,81,fffffd80097fb6e8,ffff80002a3f4568) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8061cc2ab0,ffff80002a3f4568) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8061cc2ab0,ffff80002a3f4568) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8061cc2ab0,ffff80002a3f4568) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8061cc2ab0,ffff80002a3f4568) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a3f4568) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80002a3f4568,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a3f4568,ffff80002a342fc0,ffff80002a342f10) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a342fc0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a342fc0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6f815f4a65d0, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 136 2037384656 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *494815 46150 0 0x2 0 1 syz-executor 1489 90827 0 0x14000 0x40000200 0 softclock savectx() at savectx+0xae end of kernel end trace frame: 0x7a5f79700670, 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(0xfffffd806b266d78, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7a5f79700670, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a39bda0 rbx 0 rdx 0 rcx 0xffff8000ffff2a70 rax 0x3c r8 0xffff80002a39bcd0 r9 0x1 r10 0xff645e0b44dd8598 r11 0x88cd6ce4920646a4 r12 0 r13 0 r14 0xffff8000ffff2a70 r15 0 rip 0xffffffff813a73ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a39bd20 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=494815 pid=46150 tcnt=1 stat=onproc flags process=2 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff34d0,0xffff8000ffff22b8 process=0xffff80002a2c39d8 user=0xffff80002a396000, vmspace=0xfffffd800b027000 estcpu=36, cpticks=190, pctcpu=0.55, user=3, sys=186, intr=1 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 94035 392958 5282 0 2 0 syz-executor 94035 144097 5282 0 3 0x4000080 fsleep syz-executor 94035 311189 5282 0 3 0x4000080 fsleep syz-executor 15118 217446 18856 0 2 0xc80 syz-executor 15118 6997 18856 0 3 0x4000080 ttyopn syz-executor 15118 246700 18856 0 3 0x4000080 fsleep syz-executor 15118 41319 18856 0 3 0x4000080 fsleep syz-executor 27802 143205 55843 0 2 0x2 syz-executor 95877 242765 77272 0 2 0xc90 syz-executor 95877 237197 77272 0 3 0x4000090 nanoslp syz-executor 18856 278677 55843 0 2 0xc82 syz-executor 72178 57570 1 0 3 0x80 nanoslp init 17193 394068 1138 0 3 0x82 sbwait sshd-session 24999 86644 55843 0 3 0x82 wait syz-executor 73241 512410 0 0 3 0x14200 bored sosplice 50433 230433 55843 0 2 0xc82 syz-executor 77272 374481 55843 0 2 0xc82 syz-executor *46150 494815 55843 0 7 0x2 syz-executor 5282 145424 55843 0 2 0xc82 syz-executor 9662 423542 55843 0 3 0x82 wait syz-executor 55843 133195 88105 0 2 0x2 syz-executor 88105 394772 89640 0 3 0x10008a sigsusp ksh 89640 490124 57359 0 3 0x98 kqread sshd-session 57359 436001 1138 0 3 0x92 kqread sshd-session 1138 437183 1 0 3 0x88 kqread sshd 47488 308789 58542 74 3 0x1100092 bpf pflogd 58542 202500 1 0 3 0x80 sbwait pflogd 32559 263985 76229 73 3 0x1100090 kqread syslogd 76229 452150 1 0 3 0x100082 sbwait syslogd 86638 378569 1 0 3 0x100080 kqread resolvd 89470 400818 49785 77 3 0x100092 kqread dhcpleased 36348 100011 49785 77 3 0x100092 kqread dhcpleased 49785 303362 1 0 3 0x80 kqread dhcpleased 66545 291850 0 0 2 0x14200 smr 1512 458336 0 0 2 0x14200 zerothread 23639 74799 0 0 3 0x14200 aiodoned aiodoned 95446 102832 0 0 3 0x14200 syncer update 78865 89246 0 0 3 0x14200 cleaner cleaner 50849 78102 0 0 3 0x14200 reaper reaper 29355 224720 0 0 3 0x14200 pgdaemon pagedaemon 62243 72419 0 0 3 0x14200 bored viomb 7440 5491 0 0 3 0x40014200 acpi0 acpi0 16474 139051 0 0 3 0x40014200 idle1 6978 134369 0 0 3 0x14200 bored softnet7 62796 302652 0 0 3 0x14200 bored softnet6 15986 266839 0 0 3 0x14200 bored softnet5 90807 348265 0 0 3 0x14200 bored softnet4 25422 344193 0 0 3 0x14200 bored softnet3 73816 142546 0 0 3 0x14200 bored softnet2 81426 429265 0 0 3 0x14200 bored softnet1 50149 16598 0 0 2 0x14200 softnet0 2766 235166 0 0 3 0x14200 smrbar systqmp 19247 175527 0 0 3 0x14200 bored systq 91518 118684 0 0 2 0x14200 softclockmp 90827 1489 0 0 7 0x40014200 softclock 482 131959 0 0 3 0x40014200 idle0 1 94671 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 2766 (systqmp) thread 0xffff8000ffffe000 (235166) shared rwlock systqmp r = 0 (0xffffffff8385d278) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10253 11144K 11882K 166960K 13480 0 pcb 17 16K 17K 166960K 690 0 rtable 216 11K 11K 166960K 632 0 pf 39 18K 131090K 166960K 342 0 ifaddr 40 7K 8K 166960K 166 0 ifgroup 62 2K 3K 166960K 299 0 sysctl 4 1K 9K 166960K 27 0 counters 70 37K 38K 166960K 340 0 ioctlops 0 0K 4K 166960K 2031 0 iov 0 0K 32K 166960K 193 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1491 94K 94K 166960K 3643 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 5K 9K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 314 0 dirhash 12 2K 2K 166960K 42 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 232K 166960K 2159 0 sigio 0 0K 0K 166960K 44 0 proc 63 99K 164K 166960K 881 0 subproc 72 4K 4K 166960K 100 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 390 0 in_multi 84 6K 7K 166960K 243 0 ether_multi 1 0K 0K 166960K 35 0 mrt 1 0K 0K 166960K 20 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 910 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 6 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 261 165K 178K 166960K 20867 0 UVM aobj 29 2K 2K 166960K 32 0 pinsyscall 42 84K 103K 166960K 3329 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 120 0 NDP 15 0K 2K 166960K 117 0 temp 78 8656K 8912K 166960K 90720 0 kqueue 13 20K 33K 166960K 500 0 SYN cache 2 8K 16K 166960K 3 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 120 306 0 303 3 1 2 2 0 8 1 rtentry 176 186 0 104 5 0 5 5 0 8 0 unpcb 144 1588 0 1567 10 7 3 6 0 8 2 syncache 336 13 0 13 4 3 1 1 0 8 1 tcpqe 32 4 0 4 3 2 1 1 0 8 1 tcpcb 736 761 0 685 15 8 7 7 0 8 0 arp 136 21 0 8 1 0 1 1 0 8 0 inpcb 328 2626 0 2545 19 12 7 12 0 8 0 nd6 144 33 0 15 1 0 1 1 0 8 0 pkpcb 40 62 0 62 3 2 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 mppekey 1024 2 0 2 2 2 0 1 0 8 0 ppxss 1192 109 0 109 2 1 1 1 0 8 1 pppxif 1504 13 0 13 3 2 1 1 0 8 1 pfstscr 40 3 0 3 1 1 0 1 0 8 0 pffrag 232 8 0 2 1 0 1 1 0 482 0 pffrnode 88 8 0 2 1 0 1 1 0 8 0 pffrent 40 14 0 8 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 7 0 7 3 2 1 1 0 8 1 pfanchor 1288 1 0 1 1 1 0 1 0 8 0 pftag 88 4 0 2 1 0 1 1 0 8 0 pfstitem 24 191 0 44 1 0 1 1 0 8 0 pfstkey 128 195 0 48 5 0 5 5 0 8 0 pfstate 384 192 0 45 15 0 15 15 0 8 0 pfrule 1344 25 0 20 2 1 1 2 0 8 0 rttmr 136 6 0 6 2 2 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 1010 0 600 33 7 26 31 0 8 0 art_table 40 1014 0 600 5 0 5 5 0 8 0 art_node 32 186 0 116 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 7 1 0 1 1 0 8 0 semupl 112 2 0 2 2 1 1 1 0 8 1 semapl 112 307 0 297 1 0 1 1 0 8 0 shmpl 112 29 0 3 1 0 1 1 0 8 0 dirhash 1024 37 0 20 3 0 3 3 0 8 0 dino2pl 256 5810 0 4298 95 0 95 95 0 8 0 ffsino 296 5810 0 4298 117 0 117 117 0 8 0 nchpl 144 8813 0 7109 64 0 64 64 0 8 0 rtmask 32 25 0 25 2 1 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 31240 0 31240 3 2 1 2 0 8 1 percpumem 16 185 0 135 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 kstatmem 264 192 0 162 3 0 3 3 0 8 0 scsiplug 72 6 0 6 4 3 1 1 0 8 1 scxspl 216 69023 0 69023 14 10 4 8 1 8 4 plimitpl 152 727 0 709 1 0 1 1 0 8 0 sigapl 424 2431 0 2377 7 0 7 7 0 8 0 knotepl 120 558 0 0 17 0 17 17 0 8 0 kqueuepl 224 911 0 901 9 6 3 5 0 8 2 pipepl 344 351 0 324 6 0 6 6 0 8 3 fdescpl 528 2405 0 2374 3 0 3 3 0 8 0 filepl 160 17871 0 17511 29 14 15 17 0 8 0 lockfpl 104 738 0 736 1 0 1 1 0 8 0 lockfspl 48 281 0 279 1 0 1 1 0 8 0 sessionpl 144 36 0 27 1 0 1 1 0 8 0 pgrppl 48 143 0 126 1 0 1 1 0 8 0 ucredpl 104 3643 0 3628 1 0 1 1 0 8 0 zombiepl 144 2380 0 2377 1 0 1 1 0 8 0 processpl 1232 2431 0 2377 5 0 5 5 0 8 0 procpl 664 5918 0 5858 8 1 7 7 0 8 1 sosppl 168 13 0 12 4 3 1 1 0 8 0 sockpl 752 4722 0 4617 34 22 12 21 0 8 1 mcl64k 65536 22 0 0 3 0 3 3 0 8 0 mcl16k 16384 2 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 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 134 0 0 17 0 17 17 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 57 0 0 8 1 7 8 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 1221 0 0 74 0 74 74 0 8 0 bufpl 280 29137 0 22994 439 0 439 439 0 8 0 anonpl 32 13750 0 0 111 0 111 111 0 246 0 amapchunkpl 152 71650 0 71009 57 21 36 36 0 158 6 amappl16 200 7753 0 7524 46 26 20 30 0 8 5 amappl15 192 1 0 1 1 1 0 1 0 8 0 amappl14 184 137 0 124 1 0 1 1 0 8 0 amappl13 176 4 0 3 1 0 1 1 0 8 0 amappl12 168 3102 0 3072 4 2 2 3 0 8 0 amappl11 160 73 0 59 1 0 1 1 0 8 0 amappl10 152 3 0 3 1 1 0 1 0 8 0 amappl9 144 259 0 259 1 1 0 1 0 8 0 amappl8 136 22 0 19 1 0 1 1 0 8 0 amappl7 128 138 0 125 1 0 1 1 0 8 0 amappl6 120 211 0 206 1 0 1 1 0 8 0 amappl5 112 132 0 121 1 0 1 1 0 8 0 amappl4 104 334 0 316 1 0 1 1 0 8 0 amappl3 96 12775 0 12673 5 1 4 4 0 8 0 amappl2 88 2721 0 2636 3 0 3 3 0 8 0 amappl1 80 18567 0 17917 16 0 16 16 0 8 0 amappl 88 19708 0 19522 5 0 5 5 0 92 0 dma8192 8192 1 0 1 1 0 1 1 0 8 1 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 2 0 2 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 128 254 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 31 0 3 1 0 1 1 0 8 0 uaddrrnd 24 2405 0 2374 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2405 0 2374 1 0 1 1 0 8 0 vmmpekpl 168 20840 0 20789 3 0 3 3 0 8 0 vmmpepl 168 157176 0 154887 131 11 120 121 0 357 2 vmsppl 488 2404 0 2374 5 0 5 5 0 8 0 rwobjpl 80 47078 0 39904 154 0 154 154 0 8 3 pdppl 4096 4818 0 4748 118 42 76 86 0 8 6 pvpl 32 22590 0 0 182 0 182 182 0 265 0 pmappl 256 2404 0 2374 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 389 0 68 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8379dff0) 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(ffffffff83892960) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83892960) at __mp_lock+0x192 sys/kern/kern_lock.c:165 __mp_acquire_count(ffffffff83892960,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:367 softclock_thread_run(ffffffff8376a5a8) at softclock_thread_run+0x79 sys/kern/kern_timeout.c:836 softclock_thread(ffff8000fffff4c0) at softclock_thread+0x10a sys/kern/kern_timeout.c:858 end trace frame: 0x0, count: 7 ddb{0}> trace x86_ipi_db(ffffffff8379dff0) 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(ffffffff83892960) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83892960) at __mp_lock+0x192 sys/kern/kern_lock.c:165 __mp_acquire_count(ffffffff83892960,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:367 softclock_thread_run(ffffffff8376a5a8) at softclock_thread_run+0x79 sys/kern/kern_timeout.c:836 softclock_thread(ffff8000fffff4c0) at softclock_thread+0x10a sys/kern/kern_timeout.c:858 end trace frame: 0x0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x7a5f79700670, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7a5f79700670, count: -1