uvm_fault(0xfffffd800b0277a0, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82993e38 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80002a366060 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82993e38 Starting stack trace... panic(ffffffff833a1c27) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a365fb0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001463000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff800038c02550) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff800038c02550) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a366160) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80739711c0,81,fffffd80097fb618,ffff800038c02550) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805eb8fce8,ffff800038c02550) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805eb8fce8,ffff800038c02550) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805eb8fce8,ffff800038c02550) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd805eb8fce8,ffff800038c02550) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff800038c02550) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff800038c02550,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800038c02550,ffff80002a3664d0,ffff80002a366420) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a3664d0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3664d0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x718806693490, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 168 5 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND * 34256 87463 0 0 0x4000000 1 syz-executor 483955 61304 0 0x14000 0x200 0 reaper savectx() at savectx+0xae end of kernel end trace frame: 0xa813b85d130, 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(0xfffffd800b0277a0, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0xa813b85d130, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800033869240 rbx 0 rdx 0xffff8000014e4880 rcx 0xffff8000fffef770 rax 0x33 r8 0xffff800033869170 r9 0x1 r10 0xebbf5970badcbddc r11 0xa22377e04aeb76c7 r12 0 r13 0 r14 0xffff8000fffef770 r15 0 rip 0xffffffff82e9a3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff8000338691c0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=34256 pid=87463 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800038c02d18,0xffffffff83895928 process=0xffff800038c079e0 user=0xffff800033864000, vmspace=0xfffffd806ef65b78 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 87463 271716 76827 0 2 0 syz-executor *87463 34256 76827 0 7 0x4000000 syz-executor 3936 352067 71219 0 3 0x80 nanoslp syz-executor 3936 318710 71219 0 3 0x4000080 pipewr syz-executor 3936 172349 71219 0 3 0x4000080 pipewr syz-executor 3936 248071 71219 0 3 0x4000080 fsleep syz-executor 1328 248002 50744 0 3 0x80 nanoslp syz-executor 1328 353126 50744 0 3 0x4000080 lockf syz-executor 1328 497672 50744 0 3 0x4000080 fsleep syz-executor 71219 164689 29691 0 2 0x2 syz-executor 79400 228227 19952 0 3 0x80 nanoslp syz-executor 79400 6606 19952 0 3 0x4000080 fsleep syz-executor 79400 341398 19952 0 3 0x4000080 pipewr syz-executor 99411 257474 93785 0 4 0x82000 syz-executor 99411 200767 93785 0 3 0x4082000 biowait syz-executor 99411 490074 93785 0 3 0x4002000 suspend syz-executor 99411 504974 93785 0 4 0x4082000 syz-executor 99411 210479 93785 0 3 0x4082000 inode syz-executor 70292 275313 0 0 3 0x14200 acct acct 29372 185004 0 0 3 0x14280 nfsidl nfsio 56963 312919 0 0 3 0x14280 nfsidl nfsio 54367 4608 1 0 3 0x100083 ttyin getty 50744 447831 29691 0 3 0x82 nanoslp syz-executor 42066 65570 0 0 3 0x14280 nfsidl nfsio 61101 32932 0 0 3 0x14280 nfsidl nfsio 36932 297932 0 0 3 0x14200 bored sosplice 76827 490431 29691 0 3 0x82 nanoslp syz-executor 19952 487962 29691 0 2 0x2 syz-executor 23802 323654 29691 0 3 0x82 nanoslp syz-executor 93785 129143 29691 0 3 0x82 nanoslp syz-executor 59210 507023 29691 0 3 0x82 wait syz-executor 95139 341762 29691 0 3 0x2 biowait syz-executor 29691 365855 96736 0 3 0x82 kqread syz-executor 96736 306609 43356 0 3 0x10008a sigsusp ksh 43356 506170 54563 0 3 0x98 kqread sshd-session 54563 12236 30336 0 3 0x92 kqread sshd-session 30336 68632 1 0 3 0x88 kqread sshd 65249 85666 75136 74 3 0x1100092 bpf pflogd 75136 177115 1 0 3 0x80 sbwait pflogd 88288 403095 93087 73 3 0x1100090 kqread syslogd 93087 183651 1 0 3 0x100082 sbwait syslogd 32378 419838 1 0 3 0x100080 kqread resolvd 36590 143103 26267 77 3 0x100092 kqread dhcpleased 40499 268201 26267 77 3 0x100092 kqread dhcpleased 26267 104067 1 0 3 0x80 kqread dhcpleased 282 276548 0 0 3 0x14200 bored smr 14343 56344 0 0 3 0x14200 pgzero zerothread 59014 39637 0 0 3 0x14200 aiodoned aiodoned 90826 69319 0 0 3 0x14200 syncer update 85059 277626 0 0 3 0x14200 cleaner cleaner 61304 483955 0 0 7 0x14200 reaper 62291 397398 0 0 3 0x14200 pgdaemon pagedaemon 8007 38285 0 0 3 0x14200 bored viomb 84717 339606 0 0 3 0x40014200 acpi0 acpi0 35107 311718 0 0 3 0x40014200 idle1 1580 41106 0 0 3 0x14200 bored softnet1 4484 368395 0 0 3 0x14200 netlock softnet0 18816 467207 0 0 2 0x40014200 systqmp 69079 246780 0 0 3 0x14200 bored systq 82822 111048 0 0 3 0x14200 tmoslp softclockmp 4012 312598 0 0 3 0x40014200 tmoslp softclock 33155 74085 0 0 3 0x40014200 idle0 1 153441 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 99411 (syz-executor) thread 0xffff8000fffefca0 (200767) Process 95139 (syz-executor) thread 0xffff8000ffffca68 (341762) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10237 11075K 11557K 166960K 14215 0 pcb 19 16K 22K 166960K 528 0 rtable 178 9K 10K 166960K 607 0 pf 36 18K 67486K 166960K 252 0 ifaddr 33 6K 8K 166960K 141 0 ifgroup 47 2K 2K 166960K 234 0 sysctl 4 1K 9K 166960K 21 0 counters 64 36K 37K 166960K 258 0 ioctlops 0 0K 8K 166960K 1842 0 iov 0 0K 32K 166960K 265 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1468 92K 93K 166960K 3209 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 4 624K 628K 166960K 42 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 73 0 dirhash 12 2K 3K 166960K 57 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 236K 166960K 2023 0 sigio 0 0K 0K 166960K 42 0 proc 75 131K 164K 166960K 852 0 subproc 72 4K 4K 166960K 108 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 257 0 in_multi 68 5K 7K 166960K 196 0 ether_multi 1 0K 0K 166960K 21 0 mrt 1 0K 0K 166960K 17 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 259 1155K 1155K 166960K 259 0 exec 0 0K 1K 166960K 1042 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 256 168K 185K 166960K 19842 0 UVM aobj 86 3K 3K 166960K 95 0 pinsyscall 42 84K 100K 166960K 3190 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 1K 166960K 173 0 NDP 12 0K 2K 166960K 100 0 temp 84 8652K 8767K 166960K 74271 0 kqueue 13 20K 34K 166960K 425 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 120 229 0 226 3 2 1 3 0 8 0 rtentry 176 185 0 117 5 0 5 5 0 8 0 unpcb 144 1160 0 1142 5 4 1 2 0 8 0 syncache 336 10 0 10 3 3 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 616 0 607 12 10 2 7 0 8 0 arp 136 26 0 15 1 0 1 1 0 8 0 inpcb 328 2219 0 2205 22 20 2 11 0 8 0 nd6 152 31 0 17 1 0 1 1 0 8 0 pkpcb 40 15 0 15 4 4 0 1 0 8 0 kcovpl 48 12 0 4 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 74 0 74 2 2 0 1 0 8 0 pppxif 1504 10 0 10 2 2 0 1 0 8 0 pfstscr 40 4 0 4 3 3 0 1 0 8 0 pffrag 232 15 0 5 2 1 1 1 0 482 0 pffrnode 88 11 0 2 2 1 1 1 0 8 0 pffrent 40 36 0 25 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 3 0 3 3 3 0 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 3 0 0 1 0 1 1 0 8 0 pfstitem 24 125 0 55 1 0 1 1 0 8 0 pfstkey 128 196 0 128 3 0 3 3 0 8 0 pfstate 384 160 0 92 7 0 7 7 0 8 0 pfrule 1344 40 0 36 2 1 1 2 0 8 0 rttmr 136 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 768 0 422 29 4 25 29 0 8 0 art_table 40 771 0 422 5 0 5 5 0 8 0 art_node 32 183 0 122 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 8 4 4 0 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 67 0 57 1 0 1 1 0 8 0 shmpl 112 92 0 9 3 0 3 3 0 8 0 dirhash 1024 48 0 31 3 0 3 3 0 8 0 dino2pl 256 5082 0 3565 96 0 96 96 0 8 0 ffsino 296 5082 0 3565 117 0 117 117 0 8 0 nchpl 144 7865 0 6157 64 0 64 64 0 8 0 rtmask 32 8 0 8 3 3 0 1 0 8 0 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 26915 0 26914 3 2 1 2 0 8 0 percpumem 16 144 0 97 1 0 1 1 0 8 0 kstatmem 264 152 0 130 4 2 2 3 0 8 0 scsiplug 72 3 0 3 2 2 0 1 0 8 0 scxspl 216 39042 0 39040 13 12 1 8 1 8 0 plimitpl 152 486 0 467 1 0 1 1 0 8 0 sigapl 424 2295 0 2242 8 1 7 7 0 8 0 knotepl 120 490 0 0 14 0 14 14 0 8 0 kqueuepl 224 972 0 963 15 14 1 5 0 8 0 pipepl 344 324 0 294 9 5 4 8 0 8 1 fdescpl 528 2261 0 2230 3 0 3 3 0 8 0 filepl 160 14866 0 14623 31 20 11 20 0 8 0 lockfpl 104 1122 0 1114 2 1 1 2 0 8 0 lockfspl 48 452 0 447 1 0 1 1 0 8 0 sessionpl 144 31 0 22 1 0 1 1 0 8 0 pgrppl 48 67 0 50 1 0 1 1 0 8 0 ucredpl 104 2270 0 2256 1 0 1 1 0 8 0 zombiepl 144 3156 0 3154 1 0 1 1 0 8 0 processpl 1232 2295 0 2242 5 0 5 5 0 8 0 procpl 664 5590 0 5523 7 0 7 7 0 8 0 sosppl 168 8 0 8 4 4 0 1 0 8 0 sockpl 752 3703 0 3666 36 31 5 18 0 8 0 mcl64k 65536 19 0 0 3 0 3 3 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 130 0 0 17 0 17 17 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 30 0 0 4 0 4 4 0 8 0 mtagpl 96 8 0 0 1 0 1 1 0 8 0 mbufpl 256 965 0 0 57 0 57 57 0 8 0 bufpl 280 14205 0 8062 440 0 440 440 0 8 0 anonpl 32 12188 0 0 99 0 99 99 0 246 0 amapchunkpl 152 69451 0 68905 50 27 23 32 0 158 0 amappl16 200 6206 0 6064 38 27 11 22 0 8 0 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 129 0 117 1 0 1 1 0 8 0 amappl13 176 11 0 10 1 0 1 1 0 8 0 amappl12 168 2971 0 2939 3 1 2 2 0 8 0 amappl11 160 64 0 50 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 20 0 18 1 0 1 1 0 8 0 amappl7 128 119 0 106 1 0 1 1 0 8 0 amappl6 120 221 0 218 1 0 1 1 0 8 0 amappl5 112 154 0 143 1 0 1 1 0 8 0 amappl4 104 319 0 299 1 0 1 1 0 8 0 amappl3 96 12089 0 11980 3 0 3 3 0 8 0 amappl2 88 2539 0 2459 3 0 3 3 0 8 0 amappl1 80 16890 0 16282 16 1 15 16 0 8 0 amappl 88 18757 0 18575 5 0 5 5 0 92 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 3 0 2 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 94 0 9 2 0 2 2 0 8 0 uaddrrnd 24 2261 0 2230 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2261 0 2230 1 0 1 1 0 8 0 vmmpekpl 168 18867 0 18816 4 0 4 4 0 8 0 vmmpepl 168 145679 0 143534 120 23 97 106 0 357 0 vmsppl 488 2260 0 2230 6 1 5 5 0 8 0 rwobjpl 80 43747 0 36651 146 1 145 145 0 8 0 pdppl 4096 4530 0 4460 114 42 72 84 0 8 2 pvpl 32 22262 0 0 181 1 180 180 0 265 0 pmappl 256 2260 0 2230 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 354 0 65 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837dcff0) 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+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff83946b68) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83946b68) at __mp_lock+0x1a3 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(ffffffff83946b68) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83946b68) at __mp_lock+0x199 sys/kern/kern_lock.c:165 intr_handler(ffff80002a244890,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f Xspllower() at Xspllower+0x1d km_free(ffff800033854000,6000,ffffffff83568ba0,ffffffff83637968) at km_free+0x36b sys/uvm/uvm_km.c:827 uvm_uarea_free(ffff800038c08d20) at uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 end trace frame: 0xffff80002a244ab0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff837dcff0) 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+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff83946b68) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83946b68) at __mp_lock+0x1a3 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(ffffffff83946b68) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83946b68) at __mp_lock+0x199 sys/kern/kern_lock.c:165 intr_handler(ffff80002a244890,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f Xspllower() at Xspllower+0x1d km_free(ffff800033854000,6000,ffffffff83568ba0,ffffffff83637968) at km_free+0x36b sys/uvm/uvm_km.c:827 uvm_uarea_free(ffff800038c08d20) at uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 reaper(ffff8000ffffdc90) at reaper+0x1aa sys/kern/kern_exit.c:493 end trace frame: 0x0, count: -15 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0xa813b85d130, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0xa813b85d130, count: -1