uvm_fault(0xfffffd807aa03ba0, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81252bc8 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80002a372020 gsbase 0xffff8000299ddff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81252bc8 Starting stack trace... panic(ffffffff833dc6e8) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a371f70) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff8000015b0000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(21e5f,81,2000,ffff8000fffe94e0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff8000fffe94e0) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a372120) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8069f73570,81,fffffd80097fd3a8,ffff8000fffe94e0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806a05ecb0,ffff8000fffe94e0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806a05ecb0,ffff8000fffe94e0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806a05ecb0,ffff8000fffe94e0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806a05ecb0,ffff8000fffe94e0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe94e0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe94e0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe94e0,ffff80002a372490,ffff80002a3723e0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a372490) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a372490) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79f03b100ee0, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 99 3 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *118413 97284 0 0x2 0 1 syz-executor 179413 65065 0 0x14000 0x200 0 reaper savectx() at savectx+0xae end of kernel end trace frame: 0x78132802de20, 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(0xfffffd807aa03ba0, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x78132802de20, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a344480 rbx 0 rdx 0 rcx 0xffff8000ffffd4c8 rax 0x32 r8 0xffff80002a3443b0 r9 0x1 r10 0x83f8dde2cc6abbef r11 0x2838cd845cca31c2 r12 0 r13 0 r14 0xffff8000ffffd4c8 r15 0 rip 0xffffffff820f53ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a344400 ss 0 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=118413 pid=97284 tcnt=1 stat=onproc flags process=2 proc=0 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffdc90,0xffff8000fffe9788 process=0xffff8000ffff4008 user=0xffff80002a33f000, vmspace=0xfffffd800b063000 estcpu=36, cpticks=128, pctcpu=0.12, user=5, sys=121, intr=2 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 40475 63891 6786 0 2 0 syz-executor 38227 172158 3260 0 2 0 syz-executor 94843 240680 73883 0 2 0 syz-executor 55751 255996 93287 0 2 0 syz-executor 55751 368574 93287 0 3 0x4000080 fsleep syz-executor 47782 410205 68955 0 3 0x80 nanoslp syz-executor 47782 254584 68955 0 3 0x4000080 kqread syz-executor 47782 96009 68955 0 3 0x4000080 fsleep syz-executor 76194 412459 73573 0 3 0x3000 suspend syz-executor 76194 437945 73573 0 3 0x4081000 biowait syz-executor 6786 152543 23250 0 2 0x2 syz-executor 68955 333489 23250 0 3 0x82 nanoslp syz-executor 59244 424173 1 0 3 0x100083 ttyin getty 73883 114147 23250 0 3 0x82 nanoslp syz-executor 16602 183982 0 0 3 0x14200 acct acct 3260 71748 23250 0 2 0x2 syz-executor 73573 136648 23250 0 3 0x82 nanoslp syz-executor *97284 118413 23250 0 7 0x2 syz-executor 44913 49276 23250 0 3 0x82 nanoslp syz-executor 93287 282640 23250 0 3 0x82 nanoslp syz-executor 23250 348946 67291 0 2 0x2 syz-executor 67291 26446 29911 0 3 0x10008a sigsusp ksh 29911 348903 59267 0 3 0x98 kqread sshd-session 59267 453506 10591 0 3 0x92 kqread sshd-session 10591 9805 1 0 3 0x88 kqread sshd 83357 4911 46762 74 3 0x1100092 bpf pflogd 46762 3146 1 0 3 0x80 sbwait pflogd 40861 41351 93059 73 3 0x1100090 kqread syslogd 93059 383821 1 0 3 0x100082 sbwait syslogd 9914 36929 1 0 3 0x100080 kqread resolvd 89662 448821 34769 77 3 0x100092 kqread dhcpleased 43442 432715 34769 77 3 0x100092 kqread dhcpleased 34769 140987 1 0 3 0x80 kqread dhcpleased 40348 467675 0 0 3 0x14200 bored smr 48387 108483 0 0 2 0x14200 zerothread 78203 169307 0 0 3 0x14200 aiodoned aiodoned 56411 42397 0 0 3 0x14200 syncer update 99315 325671 0 0 3 0x14200 cleaner cleaner 65065 179413 0 0 7 0x14200 reaper 15466 108664 0 0 3 0x14200 pgdaemon pagedaemon 39919 280875 0 0 3 0x14200 bored viomb 58188 142285 0 0 3 0x40014200 acpi0 acpi0 81808 498376 0 0 3 0x40014200 idle1 9729 12619 0 0 3 0x14200 bored softnet1 80564 320754 0 0 3 0x14200 netlock softnet0 58922 254963 0 0 2 0x40014200 systqmp 64336 361387 0 0 3 0x14200 bored systq 93723 430102 0 0 3 0x14200 tmoslp softclockmp 67657 119392 0 0 3 0x40014200 tmoslp softclock 32817 340551 0 0 3 0x40014200 idle0 1 335606 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 76194 (syz-executor) thread 0xffff8000fffe07f8 (437945) exclusive rrwlock inode r = 0 (0xfffffd807a1e3a58) #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+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11134 12160K 13524K 166960K 18273 0 pcb 18 16K 32K 166960K 656 0 rtable 254 14K 15K 166960K 951 0 pf 35 17K 82K 166960K 359 0 ifaddr 41 9K 11K 166960K 223 0 ifgroup 48 2K 2K 166960K 383 0 sysctl 4 1K 9K 166960K 21 0 counters 68 36K 38K 166960K 462 0 ioctlops 0 0K 9K 166960K 2176 0 iov 0 0K 16K 166960K 204 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1522 96K 96K 166960K 4774 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 29 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 94 0 dirhash 12 2K 2K 166960K 48 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 2795 0 sigio 0 0K 0K 166960K 50 0 proc 72 115K 164K 166960K 961 0 subproc 72 4K 4K 166960K 135 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 355 0 in_multi 84 6K 7K 166960K 274 0 ether_multi 1 0K 0K 166960K 26 0 mrt 2 0K 0K 166960K 23 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 247 1102K 1102K 166960K 247 0 exec 0 0K 1K 166960K 857 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 234 175K 197K 166960K 27117 0 UVM aobj 42 20K 20K 166960K 48 0 pinsyscall 42 84K 100K 166960K 4114 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 202 0 NDP 11 0K 2K 166960K 168 0 temp 77 8680K 8749K 166960K 115608 0 kqueue 14 20K 30K 166960K 504 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 120 411 0 408 6 3 3 3 0 8 2 rtentry 176 276 0 179 6 0 6 6 0 8 0 unpcb 144 1577 0 1558 13 8 5 5 0 8 4 syncache 336 17 0 17 9 8 1 1 0 8 1 tcpqe 32 7 0 7 5 5 0 1 0 8 0 tcpcb 736 1115 0 1108 28 21 7 7 0 8 5 arp 136 47 0 27 1 0 1 1 0 8 0 inpcb 328 3442 0 3430 47 37 10 12 0 8 8 nd6 152 53 0 29 2 0 2 2 0 8 0 pkpcb 40 88 0 88 7 6 1 1 0 8 1 kcovpl 48 15 0 7 1 0 1 1 0 8 0 ppxss 1192 165 0 165 4 3 1 1 0 8 1 pppxif 1504 11 0 11 6 6 0 1 0 8 0 pfstscr 40 4 0 3 2 1 1 1 0 8 0 pffrag 232 20 0 11 1 0 1 1 0 482 0 pffrnode 88 16 0 9 1 0 1 1 0 8 0 pffrent 40 40 0 31 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 4 0 4 3 3 0 1 0 8 0 pfanchor 1288 4 0 0 1 0 1 1 0 8 0 pfqueue 320 1 0 1 1 1 0 1 0 8 0 pfstitem 24 148 0 91 1 0 1 1 0 8 0 pfstkey 128 157 0 100 2 0 2 2 0 8 0 pfstate 448 153 0 97 7 0 7 7 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 7 0 7 4 4 0 1 0 8 0 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 1226 0 836 41 10 31 32 0 8 0 art_table 40 1231 0 836 6 0 6 6 0 8 0 art_node 32 275 0 191 1 0 1 1 0 8 0 sysvmsgpl 40 23 0 18 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 90 0 80 1 0 1 1 0 8 0 shmpl 112 32 0 2 1 0 1 1 0 8 0 dirhash 1024 41 0 24 3 0 3 3 0 8 0 dino2pl 256 6687 0 5172 96 0 96 96 0 8 0 ffsino 296 6687 0 5172 118 0 118 118 0 8 0 nchpl 144 10425 0 8705 65 0 65 65 0 8 0 rtmask 32 38 0 38 5 4 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 38355 0 38355 5 4 1 2 0 8 1 percpumem 16 246 0 197 1 0 1 1 0 8 0 vcpupl 3968 10 0 1 2 0 2 2 0 8 0 vmpool 848 13 0 4 1 0 1 1 0 8 0 kstatmem 264 272 0 248 8 5 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 11 0 11 7 6 1 1 0 8 1 scxspl 216 54744 0 54743 11 10 1 8 1 8 0 plimitpl 152 730 0 712 1 0 1 1 0 8 0 sigapl 424 3088 0 3040 8 2 6 8 0 8 0 knotepl 120 824 0 0 24 0 24 24 0 8 0 kqueuepl 224 1005 0 991 9 7 2 5 0 8 0 pipepl 344 480 0 452 12 9 3 12 0 8 0 fdescpl 528 3045 0 3014 3 0 3 3 0 8 0 filepl 160 22596 0 22368 39 20 19 20 0 8 5 lockfpl 104 1409 0 1406 4 3 1 3 0 8 0 lockfspl 48 491 0 488 1 0 1 1 0 8 0 sessionpl 144 40 0 31 1 0 1 1 0 8 0 pgrppl 48 157 0 140 1 0 1 1 0 8 0 ucredpl 104 3235 0 3222 1 0 1 1 0 8 0 zombiepl 144 4312 0 4310 2 1 1 1 0 8 0 processpl 1232 3088 0 3040 6 1 5 6 0 8 0 procpl 664 7690 0 7638 8 2 6 8 0 8 0 sosppl 176 13 0 13 7 6 1 1 0 8 1 sockpl 752 5815 0 5781 69 56 13 24 0 8 8 mcl64k 65536 19 0 0 3 0 3 3 0 8 0 mcl16k 16384 4 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 116 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 48 0 0 6 0 6 6 0 8 0 mtagpl 96 196 0 0 4 0 4 4 0 8 0 mbufpl 256 1136 0 0 71 0 71 71 0 8 0 bufpl 280 20474 0 14338 439 0 439 439 0 8 0 anonpl 32 13943 0 0 112 0 112 112 0 246 0 amapchunkpl 152 93565 0 93097 55 28 27 35 0 158 4 amappl16 200 9580 0 9321 121 103 18 35 0 8 4 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 7 0 7 1 1 0 1 0 8 0 amappl13 176 510 0 509 1 0 1 1 0 8 0 amappl12 168 3489 0 3448 3 0 3 3 0 8 0 amappl11 160 10 0 10 1 1 0 1 0 8 0 amappl10 152 62 0 48 1 0 1 1 0 8 0 amappl9 144 246 0 245 2 1 1 1 0 8 0 amappl8 136 32 0 29 1 0 1 1 0 8 0 amappl7 128 108 0 105 1 0 1 1 0 8 0 amappl6 120 379 0 365 1 0 1 1 0 8 0 amappl5 112 89 0 78 1 0 1 1 0 8 0 amappl4 104 497 0 468 1 0 1 1 0 8 0 amappl3 96 19308 0 19212 6 2 4 4 0 8 0 amappl2 88 673 0 611 2 0 2 2 0 8 0 amappl1 80 22426 0 21839 14 0 14 14 0 8 0 amappl 88 25829 0 25675 5 0 5 5 0 92 0 uvmvnodes 80 178 0 0 4 0 4 4 0 8 0 dma65536 65536 3 0 3 2 1 1 1 0 8 1 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 260 0 260 5 4 1 1 0 8 1 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 47 0 6 1 0 1 1 0 8 0 uaddrrnd 24 3045 0 3014 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3045 0 3014 1 0 1 1 0 8 0 vmmpekpl 168 25419 0 25355 4 0 4 4 0 8 0 vmmpepl 168 198942 0 196809 156 54 102 116 0 357 0 vmsppl 488 3044 0 3014 7 2 5 5 0 8 0 rwobjpl 80 52428 0 51055 43 12 31 37 0 8 0 pdppl 4096 6123 0 6045 125 45 80 81 0 8 2 pvpl 32 20902 0 0 168 0 168 168 0 265 0 pmappl 256 3057 0 3018 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 427 0 94 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8386bff0) 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(ffffffff83951300) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83951300) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80002a234950,ffff800000079600) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff83951300) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83951300) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80002a234ab0,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_release_all(ffffffff83889a58) at __mp_release_all+0x10 sys/kern/kern_lock.c:204 reaper(ffff8000ffffcf98) at reaper+0x15b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: 4 ddb{0}> trace x86_ipi_db(ffffffff8386bff0) 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(ffffffff83951300) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83951300) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80002a234950,ffff800000079600) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff83951300) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83951300) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80002a234ab0,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_release_all(ffffffff83889a58) at __mp_release_all+0x10 sys/kern/kern_lock.c:204 reaper(ffff8000ffffcf98) at reaper+0x15b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x78132802de20, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x78132802de20, count: -1