panic: mtx 0xffffffff83936750: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *298606 5380 32767 0x10 0 0 syz-executor 298363 9976 32767 0x10 0x4000000 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833f106d) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83936750) at mtx_enter_try+0x1da sys/kern/kern_lock.c:300 mtx_enter(ffffffff83936750) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd80088b92c0) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80088b92c0) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80088b92c0) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd805daa26f0,0,ffff80003a42b948,ffff80003a42b92c,0,2,d3ddb721c7aa792e,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003a42bb60,ffff80003a42bb98,ffff80003a42b9e0,ffff80003a42b9c8) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003a42bb60,ffff80003a42bb98,ffff80003a42bae0) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806c4b5020,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003a42bcf0,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003a42bcf0) at usertrap+0x3e3 sys/arch/amd64/amd64/trap.c:599 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f6e06e91c50, count: 2 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: mtx 0xffffffff83936750: locking against myself ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833f106d) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83936750) at mtx_enter_try+0x1da sys/kern/kern_lock.c:300 mtx_enter(ffffffff83936750) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd80088b92c0) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80088b92c0) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80088b92c0) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd805daa26f0,0,ffff80003a42b948,ffff80003a42b92c,0,2,d3ddb721c7aa792e,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003a42bb60,ffff80003a42bb98,ffff80003a42b9e0,ffff80003a42b9c8) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003a42bb60,ffff80003a42bb98,ffff80003a42bae0) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806c4b5020,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003a42bcf0,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003a42bcf0) at usertrap+0x3e3 sys/arch/amd64/amd64/trap.c:599 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f6e06e91c50, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003a42b680 rbx 0xffffffff83867dd7 cpu_info_full_primary+0x2dd7 rdx 0 rcx 0xffff80003c445738 rax 0xffffffff83866ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x26b367c7f46c1a9 r11 0x5df611f3ed1e0f5d r12 0xffffffff83867bd8 cpu_info_full_primary+0x2bd8 r13 0 r14 0 r15 0x1 rip 0xffffffff821d4c65 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003a42b670 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=298606 pid=5380 tcnt=4 stat=onproc flags process=10 proc=0 runpri=36, usrpri=50, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c4454a8,0xffff80003c445228 process=0xffff80003a412bb8 user=0xffff80003a426000, vmspace=0xfffffd806c4b5020 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND * 5380 298606 9453 32767 7 0x10 syz-executor 5380 377106 9453 32767 3 0x4000090 fsleep syz-executor 5380 299910 9453 32767 3 0x4000010 biowait syz-executor 5380 112031 9453 32767 3 0x4000010 uobjlk syz-executor 33322 243466 27306 32767 2 0x10 syz-executor 33322 416406 27306 32767 2 0x4000010 syz-executor 70127 402488 8352 0 2 0 syz-executor 83256 511768 50285 32767 2 0x10 syz-executor 83256 20925 50285 32767 3 0x4000090 kqread syz-executor 39853 71610 76077 32767 3 0x90 nanoslp syz-executor 39853 376975 76077 32767 2 0x4000010 syz-executor 72439 343310 52142 32767 3 0x90 nanoslp syz-executor 72439 424170 52142 32767 3 0x4000090 sbwait syz-executor 72439 104443 52142 32767 3 0x4000090 fsleep syz-executor 9976 344263 71771 32767 2 0x10 syz-executor 9976 298363 71771 32767 7 0x4000010 syz-executor 9976 114735 71771 32767 3 0x4000090 fsleep syz-executor 9976 384438 71771 32767 3 0x4000090 fsleep syz-executor 8645 150049 0 0 3 0x14200 bored sosplice 9453 486714 21754 32767 3 0x90 nanoslp syz-executor 71771 70557 42252 32767 2 0x10 syz-executor 27306 416041 83627 32767 3 0x90 nanoslp syz-executor 50285 407716 17877 32767 3 0x90 nanoslp syz-executor 55732 194840 66526 32767 3 0x90 nanoslp syz-executor 76077 410944 65880 32767 2 0x10 syz-executor 52142 103402 64243 32767 3 0x90 nanoslp syz-executor 21754 301815 8352 0 3 0x82 wait syz-executor 83627 495600 8352 0 3 0x82 wait syz-executor 42252 304358 8352 0 3 0x82 wait syz-executor 65880 384717 8352 0 3 0x82 wait syz-executor 17877 132724 8352 0 3 0x82 wait syz-executor 64243 19564 8352 0 3 0x82 wait syz-executor 66526 178742 8352 0 3 0x82 wait syz-executor 8352 114002 81021 0 2 0x2 syz-executor 81021 247185 95584 0 3 0x10008a sigsusp ksh 95584 411420 45403 0 3 0x98 kqread sshd-session 45403 355319 14946 0 3 0x92 kqread sshd-session 8607 258956 1 0 3 0x100083 ttyin getty 14946 56914 1 0 3 0x88 kqread sshd 90625 349716 17623 73 3 0x1100090 kqread syslogd 17623 391835 1 0 3 0x100082 sbwait syslogd 60867 69655 1 0 3 0x100080 kqread resolvd 76679 161805 18394 77 3 0x100092 kqread dhcpleased 20959 120728 18394 77 3 0x100092 kqread dhcpleased 18394 450665 1 0 3 0x80 kqread dhcpleased 65139 37790 0 0 3 0x14200 bored smr 34549 93177 0 0 2 0x14200 zerothread 87687 28738 0 0 3 0x14200 aiodoned aiodoned 6060 98417 0 0 3 0x14200 syncer update 55727 496686 0 0 3 0x14200 cleaner cleaner 13482 249534 0 0 3 0x14200 reaper reaper 30203 29943 0 0 3 0x14200 pgdaemon pagedaemon 84639 43957 0 0 3 0x14200 bored viomb 73436 389260 0 0 3 0x40014200 acpi0 acpi0 32583 259549 0 0 3 0x40014200 idle1 86158 191207 0 0 3 0x14200 bored softnet3 39134 505557 0 0 3 0x14200 bored softnet2 34861 127332 0 0 3 0x14200 bored softnet1 12108 161243 0 0 3 0x14200 bored softnet0 13514 161592 0 0 3 0x14200 bored systqmp 49294 31209 0 0 3 0x14200 bored systq 17486 173748 0 0 3 0x14200 tmoslp softclockmp 59658 459512 0 0 3 0x40014200 tmoslp softclock 10111 254020 0 0 3 0x40014200 idle0 1 270319 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff83936760) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb 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 uvn_get+0x679 sys/uvm/uvm_vnode.c:1117 #4 uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #8 usertrap+0x3e3 sys/arch/amd64/amd64/trap.c:599 #9 recall_trap+0x8 Process 5380 (syz-executor) thread 0xffff80003c445738 (298606) exclusive rwlock uobjlk r = 0 (0xfffffd805d95e540) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 uvn_io+0x667 sys/uvm/uvm_vnode.c:1297 #3 uvn_get+0x31d sys/uvm/uvm_vnode.c:1102 #4 uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #8 usertrap+0x3e3 sys/arch/amd64/amd64/trap.c:599 #9 recall_trap+0x8 exclusive mutex &uvm.pageqlock r = 0 (0xffffffff83936760) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb 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 uvn_get+0x679 sys/uvm/uvm_vnode.c:1117 #4 uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #8 usertrap+0x3e3 sys/arch/amd64/amd64/trap.c:599 #9 recall_trap+0x8 Process 5380 (syz-executor) thread 0xffff80003c4442b8 (299910) exclusive rrwlock inode r = 0 (0xfffffd8067c43b00) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:605 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 sys_ftruncate+0x1c4 sys/kern/vfs_syscalls.c:2912 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:742 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10187 10953K 10967K 166960K 11268 0 pcb 17 12K 12K 166960K 17 0 rtable 219 6K 7K 166960K 362 0 pf 29 16K 16K 166960K 31 0 ifaddr 38 6K 7K 166960K 44 0 ifgroup 46 2K 2K 166960K 50 0 sysctl 3 1K 9K 166960K 7 0 counters 66 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 30 0 iov 0 0K 12K 166960K 11 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1334 84K 84K 166960K 1357 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 12 0 VM map 2 1K 1K 166960K 2 0 sem 11 0K 0K 166960K 13 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 24 86K 125K 166960K 328 0 sigio 0 0K 0K 166960K 2 0 proc 61 91K 140K 166960K 505 0 subproc 63 3K 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 38 0 in_multi 88 6K 7K 166960K 107 0 ether_multi 1 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 361 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 259 160K 183K 166960K 4498 0 UVM aobj 19 2K 2K 166960K 20 0 pinsyscall 45 90K 114K 166960K 1340 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 23 0 NDP 10 0K 2K 166960K 27 0 temp 37 8675K 8740K 166960K 7022 0 kqueue 13 20K 24K 166960K 38 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> 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 54 0 50 1 0 1 1 0 8 0 rtentry 176 113 0 12 6 0 6 6 0 8 0 unpcb 144 235 0 216 4 0 4 4 0 8 3 syncache 336 7 0 7 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 108 0 101 4 0 4 4 0 8 3 arp 128 18 0 2 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 2 0 0 1 0 1 1 0 8 0 inpcb 328 300 0 289 6 0 6 6 0 8 4 ip6q 72 1 0 1 1 0 1 1 0 8 1 ip6af 40 2 0 2 1 0 1 1 0 8 1 nd6 144 26 0 3 1 0 1 1 0 8 0 kcovpl 48 8 0 1 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 457 0 44 29 0 29 29 0 8 2 art_table 32 458 0 44 4 0 4 4 0 8 0 art_node 16 112 0 20 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 2 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 10 0 1 1 0 1 1 0 8 0 shmpl 112 17 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1794 0 287 95 0 95 95 0 8 0 ffsino 288 1794 0 287 108 0 108 108 0 8 0 nchpl 144 2251 0 568 63 0 63 63 0 8 0 uvmvnodes 80 1875 0 0 39 0 39 39 0 8 0 vnodes 216 1875 0 0 105 0 105 105 0 8 0 namei 1024 6975 0 6975 2 0 2 2 0 8 2 percpumem 16 49 0 1 1 0 1 1 0 8 0 kstatmem 264 24 0 2 2 0 2 2 0 8 0 scxspl 216 7437 0 7435 10 2 8 8 1 8 7 plimitpl 152 101 0 78 2 0 2 2 0 8 1 sigapl 424 603 0 548 8 0 8 8 0 8 0 knotepl 120 541 0 0 18 1 17 18 0 8 0 kqueuepl 224 97 0 86 3 0 3 3 0 8 2 pipepl 336 153 0 122 6 0 6 6 0 8 3 fdescpl 520 584 0 548 4 0 4 4 0 8 0 filepl 160 2587 0 2375 14 1 13 13 0 8 3 lockfpl 104 50 0 47 1 0 1 1 0 8 0 lockfspl 48 23 0 20 1 0 1 1 0 8 0 sessionpl 144 25 0 10 1 0 1 1 0 8 0 pgrppl 48 33 0 11 1 0 1 1 0 8 0 ucredpl 104 312 0 294 1 0 1 1 0 8 0 zombiepl 144 549 0 548 1 0 1 1 0 8 0 processpl 1240 603 0 548 5 0 5 5 0 8 0 procpl 656 903 0 837 7 0 7 7 0 8 1 sockpl 728 590 0 556 9 0 9 9 0 8 5 mcl64k 65536 3 0 0 1 0 1 1 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 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 111 0 0 14 0 14 14 0 8 0 mcl2k 2048 27 0 0 4 0 4 4 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 278 0 0 18 0 18 18 0 8 0 bufpl 280 2612 0 119 179 0 179 179 0 8 0 anonpl 32 7190 0 0 58 0 58 58 0 246 0 amapchunkpl 152 14473 0 13840 37 0 37 37 0 158 11 amappl16 200 2270 0 2176 10 1 9 9 0 8 4 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 105 0 95 1 0 1 1 0 8 0 amappl13 176 3 0 3 2 2 0 1 0 8 0 amappl12 168 1185 0 1149 2 0 2 2 0 8 0 amappl11 160 48 0 37 1 0 1 1 0 8 0 amappl10 152 7 0 6 1 0 1 1 0 8 0 amappl9 144 246 0 246 1 1 0 1 0 8 0 amappl8 136 85 0 83 1 0 1 1 0 8 0 amappl7 128 93 0 83 1 0 1 1 0 8 0 amappl6 120 191 0 188 1 0 1 1 0 8 0 amappl5 112 117 0 109 1 0 1 1 0 8 0 amappl4 104 289 0 273 1 0 1 1 0 8 0 amappl3 96 2412 0 2284 4 0 4 4 0 8 0 amappl2 88 639 0 583 2 0 2 2 0 8 0 amappl1 80 9364 0 8796 14 0 14 14 0 8 0 amappl 88 3822 0 3628 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 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 19 0 1 1 0 1 1 0 8 0 uaddrrnd 24 584 0 548 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 584 0 548 1 0 1 1 0 8 0 vmmpekpl 168 6626 0 6582 3 0 3 3 0 8 0 vmmpepl 168 44113 0 41895 100 0 100 100 0 357 3 vmsppl 480 583 0 548 7 1 6 6 0 8 0 rwobjpl 72 16687 0 13882 52 0 52 52 0 8 0 pdppl 4096 1175 0 1096 109 26 83 97 0 8 4 pvpl 32 13131 0 0 106 0 106 106 0 265 0 pmappl 256 583 0 548 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 404 0 29 11 0 11 11 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833f106d) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83936750) at mtx_enter_try+0x1da sys/kern/kern_lock.c:300 mtx_enter(ffffffff83936750) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd80088b92c0) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80088b92c0) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80088b92c0) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd805daa26f0,0,ffff80003a42b948,ffff80003a42b92c,0,2,d3ddb721c7aa792e,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003a42bb60,ffff80003a42bb98,ffff80003a42b9e0,ffff80003a42b9c8) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003a42bb60,ffff80003a42bb98,ffff80003a42bae0) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806c4b5020,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003a42bcf0,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003a42bcf0) at usertrap+0x3e3 sys/arch/amd64/amd64/trap.c:599 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f6e06e91c50, count: -13 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299ddff0) 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_cmp8(b000,1000) at __sanitizer_cov_trace_cmp8+0x54 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_cmp8(b000,1000) at __sanitizer_cov_trace_cmp8+0x54 sys/dev/kcov.c:212 uvmfault_lookup(ffff80003c464e90,0) at uvmfault_lookup+0x175 sys/uvm/uvm_fault.c:1931 uvm_fault_check(ffff80003c464e90,ffff80003c464ec8,ffff80003c464f00,0) at uvm_fault_check+0x4a sys/uvm/uvm_fault.c:741 uvm_fault(fffffd806c39d028,2000002a5000,0,1) at uvm_fault+0x106 sys/uvm/uvm_fault.c:677 kpageflttrap(ffff80003c465040,2000002a5000) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:283 kerntrap(ffff80003c465040) at kerntrap+0x116 sys/arch/amd64/amd64/trap.c:487 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b _copyin() at _copyin+0x57 pipe_write(fffffd806ca93340,ffff80003c465308,0) at pipe_write+0x4a3 sys/kern/sys_pipe.c:559 dofilewritev(ffff8000ffff1c50,2,ffff80003c465308,0,ffff80003c4653c0) at dofilewritev+0x23c sys/kern/sys_generic.c:380 sys_write(ffff8000ffff1c50,ffff80003c465470,ffff80003c4653c0) at sys_write+0xa2 sys/kern/sys_generic.c:300 end trace frame: 0xffff80003c465460, count: 0 ddb{1}> trace x86_ipi_db(ffff8000299ddff0) 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_cmp8(b000,1000) at __sanitizer_cov_trace_cmp8+0x54 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_cmp8(b000,1000) at __sanitizer_cov_trace_cmp8+0x54 sys/dev/kcov.c:212 uvmfault_lookup(ffff80003c464e90,0) at uvmfault_lookup+0x175 sys/uvm/uvm_fault.c:1931 uvm_fault_check(ffff80003c464e90,ffff80003c464ec8,ffff80003c464f00,0) at uvm_fault_check+0x4a sys/uvm/uvm_fault.c:741 uvm_fault(fffffd806c39d028,2000002a5000,0,1) at uvm_fault+0x106 sys/uvm/uvm_fault.c:677 kpageflttrap(ffff80003c465040,2000002a5000) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:283 kerntrap(ffff80003c465040) at kerntrap+0x116 sys/arch/amd64/amd64/trap.c:487 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b _copyin() at _copyin+0x57 pipe_write(fffffd806ca93340,ffff80003c465308,0) at pipe_write+0x4a3 sys/kern/sys_pipe.c:559 dofilewritev(ffff8000ffff1c50,2,ffff80003c465308,0,ffff80003c4653c0) at dofilewritev+0x23c sys/kern/sys_generic.c:380 sys_write(ffff8000ffff1c50,ffff80003c465470,ffff80003c4653c0) at sys_write+0xa2 sys/kern/sys_generic.c:300 syscall(ffff80003c465470) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c465470) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb6a34140f00, count: -16