uvm_fault(0xfffffd8078f2f7b0, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81fa4c08 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c4571d0 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81fa4c08 Starting stack trace... panic(ffffffff833b6083) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c457120) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001639000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,2,2000,ffff8000357f42b8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,2,2000,ffff8000357f42b8) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c4572d0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd800c66c2b0,2,fffffd80097fb5b0,ffff8000357f42b8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8064561808,ffff8000357f42b8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8064561808,ffff8000357f42b8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8064561808,ffff8000357f42b8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8064561808,ffff8000357f42b8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000357f42b8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000357f42b8,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000357f42b8,ffff80003c457640,ffff80003c457590) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c457640) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c457640) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x73d78007ea30, 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 * 31009 6142 0 0 0 1 syz-executor 248136 12934 0 0x14000 0x200 0 reaper proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77720cc3cac0, 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(0xfffffd8078f2f7b0, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77720cc3cac0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c4f3220 rbx 0 rdx 0 rcx 0xffff800030bda560 rax 0x2a r8 0xffff80003c4f3150 r9 0x1 r10 0xdab10bcd3f0a71d5 r11 0xbf620244223dff07 r12 0 r13 0xffffffff826ea088 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff812c84c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c4f31a0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=31009 pid=6142 tcnt=2 stat=onproc flags process=0 proc=0 runpri=82, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800030bdb4f0,0xffff800030bdbcc8 process=0xffff80003c4cb518 user=0xffff80003c4ee000, vmspace=0xfffffd8067db15e8 estcpu=32, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 88582 76172 67206 0 2 0 syz-executor 44931 207027 31817 0 3 0x80 fsleep syz-executor 44931 406569 31817 0 3 0x4000080 ttyout syz-executor 43526 213690 38104 0 3 0x80 fsleep syz-executor 43526 437935 38104 0 3 0x4000080 fifor syz-executor 73975 286311 827 0 3 0x80 fsleep syz-executor 73975 277907 827 0 3 0x4000080 sbwait syz-executor * 6142 31009 56287 0 7 0 syz-executor 6142 485912 56287 0 3 0x4000080 fsleep syz-executor 29116 304271 33059 60929 3 0x90 fsleep syz-executor 29116 295386 33059 60929 3 0x4000090 netacc syz-executor 56287 270567 66212 0 3 0x82 nanoslp syz-executor 90569 159861 0 0 3 0x14280 nfsidl nfsio 71638 231777 0 0 3 0x14280 nfsidl nfsio 26100 392358 0 0 3 0x14280 nfsidl nfsio 26707 167955 0 0 3 0x14280 nfsidl nfsio 39545 137936 0 0 3 0x14280 nfsidl nfsio 4914 179912 0 0 3 0x14280 nfsidl nfsio 39513 165853 0 0 3 0x14280 nfsidl nfsio 18648 518726 0 0 3 0x14280 nfsidl nfsio 85428 85645 0 0 3 0x14280 nfsidl nfsio 42003 182136 0 0 3 0x14280 nfsidl nfsio 21427 62543 0 0 3 0x14280 nfsidl nfsio 84322 173193 0 0 3 0x14280 nfsidl nfsio 33809 1186 0 0 3 0x14280 nfsidl nfsio 70952 496152 0 0 3 0x14280 nfsidl nfsio 65342 195371 0 0 3 0x14280 nfsidl nfsio 57913 49808 0 0 3 0x14280 nfsidl nfsio 24971 329311 0 0 3 0x14280 nfsidl nfsio 13199 179084 0 0 3 0x14280 nfsidl nfsio 26958 271180 0 0 3 0x14280 nfsidl nfsio 61618 40596 0 0 3 0x14280 nfsidl nfsio 827 173843 66212 0 3 0x82 nanoslp syz-executor 58770 209668 0 0 3 0x14200 acct acct 20437 481795 0 0 3 0x14200 bored sosplice 71477 235054 66212 0 3 0x82 wait syz-executor 31817 225651 66212 0 3 0x82 nanoslp syz-executor 38104 414419 66212 0 3 0x82 nanoslp syz-executor 33059 311081 66212 0 3 0x82 nanoslp syz-executor 98975 346676 66212 0 3 0x82 nanoslp syz-executor 67206 20827 66212 0 3 0x82 nanoslp syz-executor 66212 149857 72236 0 3 0x82 kqread syz-executor 72236 193280 20811 0 3 0x10008a sigsusp ksh 20811 387601 68243 0 3 0x98 kqread sshd-session 68243 275732 16279 0 3 0x92 kqread sshd-session 55198 132419 1 0 3 0x100083 ttyopn getty 16279 51124 1 0 3 0x88 kqread sshd 35414 263860 25102 74 3 0x1100092 bpf pflogd 25102 102574 1 0 3 0x80 sbwait pflogd 16817 249043 24788 73 3 0x1100090 kqread syslogd 24788 474353 1 0 3 0x100082 sbwait syslogd 48689 325487 1 0 3 0x100080 kqread resolvd 7517 490683 45750 77 3 0x100092 kqread dhcpleased 82870 98414 45750 77 3 0x100092 kqread dhcpleased 45750 415817 1 0 3 0x80 kqread dhcpleased 54175 97996 0 0 3 0x14200 bored smr 51651 316614 0 0 2 0x14200 zerothread 10364 253577 0 0 3 0x14200 aiodoned aiodoned 71591 295288 0 0 3 0x14200 syncer update 38385 445664 0 0 3 0x14200 cleaner cleaner 12934 248136 0 0 7 0x14200 reaper 34421 305565 0 0 3 0x14200 pgdaemon pagedaemon 29328 184822 0 0 3 0x14200 bored viomb 7748 215344 0 0 3 0x40014200 acpi0 acpi0 97561 479214 0 0 3 0x40014200 idle1 54620 183051 0 0 3 0x14200 bored softnet1 32394 381573 0 0 3 0x14200 bored softnet0 50300 415906 0 0 2 0x40014200 systqmp 62272 156129 0 0 3 0x14200 bored systq 16037 197420 0 0 3 0x14200 tmoslp softclockmp 14725 183194 0 0 3 0x40014200 tmoslp softclock 95867 490682 0 0 3 0x40014200 idle0 1 510973 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff8394b878) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 uvm_pmr_freepageq+0x15c sys/uvm/uvm_pmemrange.c:1371 #4 km_free+0x36b sys/uvm/uvm_km.c:827 #5 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 #6 reaper+0x1aa sys/kern/kern_exit.c:493 #7 proc_trampoline+0x10 Process 73975 (syz-executor) thread 0xffff800030bdaa90 (277907) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10224 11133K 12421K 166960K 13225 0 pcb 17 16K 18K 166960K 476 0 rtable 226 15K 15K 166960K 655 0 pf 40 18K 82K 166960K 231 0 ifaddr 37 6K 7K 166960K 110 0 ifgroup 62 2K 3K 166960K 175 0 sysctl 4 1K 9K 166960K 17 0 counters 70 37K 37K 166960K 230 0 ioctlops 0 0K 4K 166960K 1793 0 iov 1 4K 16K 166960K 132 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1468 92K 93K 166960K 2480 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 13K 166960K 24 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 84 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 1327 0 sigio 0 0K 0K 166960K 21 0 proc 72 115K 180K 166960K 705 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 129 0 in_multi 62 4K 7K 166960K 195 0 ether_multi 1 0K 0K 166960K 18 0 mrt 1 0K 0K 166960K 10 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 582 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 251 152K 179K 166960K 13659 0 UVM aobj 98 5K 7K 166960K 102 0 pinsyscall 43 86K 104K 166960K 2510 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 79 0 NDP 13 0K 2K 166960K 79 0 temp 77 8655K 8777K 166960K 56713 0 kqueue 13 20K 31K 166960K 246 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 120 176 0 173 3 2 1 3 0 8 0 rtentry 176 191 0 112 6 0 6 6 0 8 0 unpcb 144 662 0 639 6 4 2 4 0 8 0 syncache 336 7 0 7 5 4 1 1 0 8 1 tcpqe 32 2 0 2 1 0 1 1 0 8 1 tcpcb 736 284 0 277 1 0 1 1 0 8 0 arp 136 33 0 17 1 0 1 1 0 8 0 inpcb 328 1457 0 1429 24 16 8 15 0 8 5 nd6 152 38 0 23 1 0 1 1 0 8 0 pkpcb 40 45 0 45 2 1 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 72 0 72 1 0 1 1 0 8 1 pppxif 1504 2 0 2 1 1 0 1 0 8 0 pffrag 232 16 0 7 1 0 1 1 0 482 0 pffrnode 88 14 0 5 1 0 1 1 0 8 0 pffrent 40 28 0 19 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 2 0 2 2 2 0 1 0 8 0 pfpktdelay 88 85 0 0 2 0 2 2 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 43 0 28 1 0 1 1 0 8 0 pfstkey 128 43 0 28 2 0 2 2 0 8 0 pfstate 384 43 0 28 4 0 4 4 0 8 0 pfsrctr 152 31 0 27 1 0 1 1 0 8 0 pfrule 1344 29 0 23 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 2 0 1 0 8 0 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 751 0 404 31 8 23 29 0 8 0 art_table 40 756 0 404 5 0 5 5 0 8 0 art_node 32 190 0 124 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 3 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 82 0 72 1 0 1 1 0 8 0 shmpl 112 99 0 4 3 0 3 3 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 3972 0 2459 96 0 96 96 0 8 1 ffsino 296 3972 0 2459 118 1 117 118 0 8 0 nchpl 144 5724 0 4011 64 0 64 64 0 8 0 rtmask 32 28 0 28 2 1 1 1 0 8 1 vnodes 216 4549 0 0 253 0 253 253 0 8 0 namei 1024 20828 0 20828 3 2 1 2 0 8 1 percpumem 16 130 0 80 1 0 1 1 0 8 0 kstatmem 264 118 0 88 3 0 3 3 0 8 0 scsiplug 72 5 0 5 3 3 0 1 0 8 0 scxspl 216 51953 0 51952 12 9 3 8 1 8 2 plimitpl 152 356 0 337 1 0 1 1 0 8 0 sigapl 424 1631 0 1561 9 1 8 8 0 8 0 knotepl 120 609 0 0 19 0 19 19 0 8 0 kqueuepl 224 535 0 526 6 5 1 3 0 8 0 pipepl 344 309 0 282 6 0 6 6 0 8 3 fdescpl 528 1593 0 1561 3 0 3 3 0 8 0 filepl 160 10336 0 10108 22 9 13 17 0 8 2 lockfpl 104 525 0 522 2 1 1 2 0 8 0 lockfspl 48 148 0 145 1 0 1 1 0 8 0 sessionpl 144 26 0 17 1 0 1 1 0 8 0 pgrppl 48 50 0 33 1 0 1 1 0 8 0 ucredpl 104 1858 0 1844 1 0 1 1 0 8 0 zombiepl 144 1563 0 1561 1 0 1 1 0 8 0 processpl 1232 1631 0 1561 6 0 6 6 0 8 0 procpl 664 3614 0 3539 8 1 7 8 0 8 0 sosppl 168 1 0 1 1 1 0 1 0 8 0 sockpl 752 2372 0 2318 28 16 12 20 0 8 5 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 117 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 59 0 0 6 0 6 6 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 360 0 0 21 0 21 21 0 8 0 bufpl 280 22318 0 16181 439 0 439 439 0 8 0 anonpl 32 13785 0 0 111 0 111 111 0 246 0 amapchunkpl 152 45163 0 44603 44 14 30 33 0 158 6 amappl16 200 8606 0 8332 67 38 29 32 0 8 1 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 8 0 8 1 1 0 1 0 8 0 amappl13 176 550 0 548 1 0 1 1 0 8 0 amappl12 168 1995 0 1952 3 0 3 3 0 8 0 amappl11 160 12 0 12 3 2 1 1 0 8 1 amappl10 152 49 0 35 1 0 1 1 0 8 0 amappl9 144 263 0 263 2 1 1 1 0 8 1 amappl8 136 30 0 27 1 0 1 1 0 8 0 amappl7 128 135 0 133 1 0 1 1 0 8 0 amappl6 120 304 0 291 1 0 1 1 0 8 0 amappl5 112 77 0 66 1 0 1 1 0 8 0 amappl4 104 454 0 423 1 0 1 1 0 8 0 amappl3 96 7944 0 7853 4 1 3 3 0 8 0 amappl2 88 1722 0 1643 2 0 2 2 0 8 0 amappl1 80 14682 0 14074 16 2 14 15 0 8 0 amappl 88 12655 0 12481 5 0 5 5 0 92 0 uvmvnodes 80 4549 0 0 93 0 93 93 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 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 128 256 0 256 3 3 0 1 0 8 0 dma64 64 7 0 7 2 2 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 72 101 0 4 2 0 2 2 0 8 0 uaddrrnd 24 1594 0 1562 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1594 0 1562 1 0 1 1 0 8 0 vmmpekpl 168 14134 0 14088 3 0 3 3 0 8 0 vmmpepl 168 110138 0 107911 134 24 110 114 0 357 1 vmsppl 488 1593 0 1562 8 3 5 5 0 8 1 rwobjpl 80 37513 0 31682 124 0 124 124 0 8 0 pdppl 4096 3196 0 3124 112 38 74 88 0 8 2 pvpl 32 22071 0 0 178 0 178 178 0 265 0 pmappl 256 1593 0 1562 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 309 0 56 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837fcff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x4f sys/dev/kcov.c:159 msleep_nsec(ffffffff837d86c8,ffffffff837d8690,4,ffffffff83398190,ffffffffffffffff) at msleep_nsec+0x1a0 sys/kern/kern_synch.c:202 reaper(ffff8000ffffd760) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: 9 ddb{0}> trace x86_ipi_db(ffffffff837fcff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x4f sys/dev/kcov.c:159 msleep_nsec(ffffffff837d86c8,ffffffff837d8690,4,ffffffff83398190,ffffffffffffffff) at msleep_nsec+0x1a0 sys/kern/kern_synch.c:202 reaper(ffff8000ffffd760) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: -6 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: 0x77720cc3cac0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77720cc3cac0, count: -1