panic: mtx 0xffffffff83962558: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 189612 62902 0 0 0 1 syz-executor *412608 42967 32767 0x10 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833dec40) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83962558) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff83962558) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd800883ca78) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800883ca78) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800883ca78) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8063f7df28,0,ffff800034fedc78,ffff800034fedc54,0,2,cf2a6788d1f3466c,ffff800034feded0) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff800034fede98,ffff800034feded0,ffff800034fedd00,ffff800034fedd08) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff800034fede98,ffff800034feded0,ffff800034fede10) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806c183200,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff800034fee020,200000000100) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff800034fee020) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x770e3eda8870, 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 0xffffffff83962558: locking against myself ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833dec40) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83962558) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff83962558) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd800883ca78) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800883ca78) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800883ca78) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8063f7df28,0,ffff800034fedc78,ffff800034fedc54,0,2,cf2a6788d1f3466c,ffff800034feded0) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff800034fede98,ffff800034feded0,ffff800034fedd00,ffff800034fedd08) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff800034fede98,ffff800034feded0,ffff800034fede10) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806c183200,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff800034fee020,200000000100) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff800034fee020) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x770e3eda8870, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800034fed9c0 rbx 0xffffffff83835dcf cpu_info_full_primary+0x2dcf rdx 0 rcx 0xffff8000ffff02b0 rax 0xffffffff83834ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x53242e810af85836 r11 0x9384847c3282d156 r12 0xffffffff83835bd0 cpu_info_full_primary+0x2bd0 r13 0 r14 0 r15 0x1 rip 0xffffffff81758355 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800034fed9b0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=412608 pid=42967 tcnt=4 stat=onproc flags process=10 proc=0 runpri=50, usrpri=86, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff1210,0xffff8000ffff1740 process=0xffff80003c420970 user=0xffff800034fe9000, vmspace=0xfffffd806c183200 estcpu=36, cpticks=4, pctcpu=0.0, user=1, sys=3, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 62902 189612 63200 0 7 0 syz-executor 39683 160983 11396 0 2 0 syz-executor 42330 487933 91319 32767 2 0x10 syz-executor 42330 31591 91319 32767 2 0x4000010 syz-executor 91001 99415 62301 32767 2 0x10 syz-executor 91001 278509 62301 32767 3 0x4000090 fsleep syz-executor 41013 91127 74506 32767 2 0x10 syz-executor 41013 239016 74506 32767 3 0x4000090 fsleep syz-executor *42967 412608 45431 32767 7 0x10 syz-executor 42967 10651 45431 32767 3 0x4000010 biowait syz-executor 42967 2944 45431 32767 3 0x4000090 fsleep syz-executor 42967 314830 45431 32767 3 0x4000090 fsleep syz-executor 11396 470590 63200 0 3 0x82 wait syz-executor 11648 471352 26773 32767 3 0x90 nanoslp syz-executor 11648 133413 26773 32767 3 0x4000090 lockf syz-executor 11648 379849 26773 32767 3 0x4000090 lockf syz-executor 11648 487225 26773 32767 3 0x4000090 fsleep syz-executor 11301 459389 99423 32767 2 0x4000010 syz-executor 11301 338976 99423 32767 3 0x4000090 msgwait syz-executor 11301 150267 99423 32767 3 0x4000090 fsleep syz-executor 45431 368246 20657 32767 3 0x90 nanoslp syz-executor 74506 223993 24118 32767 3 0x90 nanoslp syz-executor 26773 508939 48950 32767 3 0x90 nanoslp syz-executor 99423 177525 31621 32767 3 0x90 nanoslp syz-executor 62301 90797 7186 32767 3 0x90 nanoslp syz-executor 91319 136759 784 32767 3 0x90 nanoslp syz-executor 24118 310229 63200 0 3 0x82 wait syz-executor 48950 231558 63200 0 3 0x82 wait syz-executor 31621 99335 63200 0 3 0x82 wait syz-executor 20657 26645 63200 0 3 0x82 wait syz-executor 7186 511720 63200 0 3 0x82 wait syz-executor 784 210805 63200 0 3 0x82 wait syz-executor 63200 238158 37265 0 3 0x82 kqread syz-executor 37265 3820 83664 0 3 0x10008a sigsusp ksh 83664 79420 8553 0 3 0x98 kqread sshd-session 8553 306087 19617 0 3 0x92 kqread sshd-session 96094 3646 1 0 3 0x100083 ttyin getty 19617 392554 1 0 3 0x88 kqread sshd 93342 95360 50642 73 3 0x1100090 kqread syslogd 50642 506684 1 0 3 0x100082 sbwait syslogd 87153 277525 1 0 3 0x100080 kqread resolvd 89436 245517 3412 77 3 0x100092 kqread dhcpleased 63938 177467 3412 77 3 0x100092 kqread dhcpleased 3412 350718 1 0 3 0x80 kqread dhcpleased 23346 437163 0 0 3 0x14200 bored smr 10536 248794 0 0 2 0x14200 zerothread 15734 241161 0 0 3 0x14200 aiodoned aiodoned 89492 144255 0 0 3 0x14200 syncer update 73503 212002 0 0 3 0x14200 cleaner cleaner 73335 107493 0 0 3 0x14200 reaper reaper 34143 352658 0 0 3 0x14200 pgdaemon pagedaemon 52683 265289 0 0 3 0x14200 bored viomb 39385 304483 0 0 3 0x40014200 acpi0 acpi0 87934 171498 0 0 3 0x40014200 idle1 13656 269318 0 0 3 0x14200 bored softnet3 38697 198093 0 0 3 0x14200 bored softnet2 16283 520760 0 0 3 0x14200 bored softnet1 93035 357825 0 0 3 0x14200 bored softnet0 7642 377262 0 0 3 0x14200 bored systqmp 79980 128946 0 0 3 0x14200 bored systq 26820 494005 0 0 3 0x14200 tmoslp softclockmp 20511 141383 0 0 3 0x40014200 tmoslp softclock 5813 401309 0 0 3 0x40014200 idle0 1 86391 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 (0xffffffff83962568) #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+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 uvn_get+0x679 sys/uvm/uvm_vnode.c:1117 #4 uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 #5 uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 #6 uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #8 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #9 recall_trap+0x8 Process 42967 (syz-executor) thread 0xffff8000ffff02b0 (412608) exclusive rwlock uobjlk r = 0 (0xfffffd806a96be88) #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+0x3ea sys/kern/kern_rwlock.c:316 #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+0x319 sys/uvm/uvm_fault.c:1588 #5 uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 #6 uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #8 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #9 recall_trap+0x8 exclusive mutex &uvm.pageqlock r = 0 (0xffffffff83962568) #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+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 uvn_get+0x679 sys/uvm/uvm_vnode.c:1117 #4 uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 #5 uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 #6 uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #8 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #9 recall_trap+0x8 Process 42967 (syz-executor) thread 0xffff80003c455c58 (10651) exclusive rrwlock inode r = 0 (0xfffffd806bfdc200) #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+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 sys_ftruncate+0x1c4 sys/kern/vfs_syscalls.c:2920 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 42967 (syz-executor) thread 0xffff80003c4559c8 (2944) exclusive rwlock futexpl r = 0 (0xffffffff839ad640) #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+0x3ea sys/kern/kern_rwlock.c:316 #2 pool_get+0x10b sys/kern/subr_pool.c:583 #3 futex_get+0x309 sys/kern/sys_futex.c:171 #4 futex_wait+0x328 sys/kern/sys_futex.c:-1 #5 sys_futex+0x149 sys/kern/sys_futex.c:101 #6 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 exclusive rwlock futex r = 0 (0xffffffff8387dbf8) #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+0x3ea sys/kern/kern_rwlock.c:316 #2 sys_futex+0x69 sys/kern/sys_futex.c:98 #3 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #4 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10180 10949K 10965K 166960K 11263 0 pcb 17 12K 12K 166960K 17 0 rtable 190 5K 7K 166960K 369 0 pf 27 16K 16K 166960K 31 0 ifaddr 34 6K 7K 166960K 44 0 ifgroup 42 1K 2K 166960K 50 0 sysctl 3 1K 1K 166960K 3 0 counters 60 35K 36K 166960K 64 0 ioctlops 0 0K 2K 166960K 33 0 iov 0 0K 16K 166960K 6 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1334 84K 84K 166960K 1485 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 14 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 23 82K 125K 166960K 358 0 sigio 0 0K 0K 166960K 5 0 proc 58 79K 127K 166960K 495 0 subproc 63 3K 4K 166960K 171 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 31 0 in_multi 77 5K 7K 166960K 106 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 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 379 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 238 144K 168K 166960K 4658 0 UVM aobj 72 3K 3K 166960K 73 0 pinsyscall 44 88K 113K 166960K 1395 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 25 0 NDP 9 0K 2K 166960K 27 0 temp 40 8680K 8744K 166960K 4679 0 kqueue 13 20K 28K 166960K 64 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 56 0 52 1 0 1 1 0 8 0 rtentry 176 114 0 26 6 0 6 6 0 8 1 unpcb 144 142 0 126 2 0 2 2 0 8 1 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 808 124 0 118 4 0 4 4 0 8 3 arp 128 18 0 4 1 0 1 1 0 8 0 inpcb 384 280 0 271 5 0 5 5 0 8 3 nd6 144 27 0 9 1 0 1 1 0 8 0 kcovpl 48 19 0 12 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 459 0 94 29 0 29 29 0 8 1 art_table 32 460 0 94 4 0 4 4 0 8 0 art_node 16 113 0 33 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 7 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 11 0 1 1 0 1 1 0 8 0 shmpl 112 70 0 1 2 0 2 2 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1830 0 311 95 0 95 95 0 8 0 ffsino 288 1830 0 311 109 0 109 109 0 8 0 nchpl 144 2270 0 576 63 0 63 63 0 8 0 uvmvnodes 80 2010 0 0 42 0 42 42 0 8 0 vnodes 216 2010 0 0 112 0 112 112 0 8 0 namei 1024 6930 0 6930 2 0 2 2 0 8 2 percpumem 16 47 0 2 1 0 1 1 0 8 0 kstatmem 264 22 0 4 2 0 2 2 0 8 0 scxspl 216 7624 0 7622 3 2 1 2 1 8 0 plimitpl 152 147 0 125 2 0 2 2 0 8 1 sigapl 424 619 0 566 8 0 8 8 0 8 1 futexpl 64 2610 0 2604 1 0 1 1 0 8 0 knotepl 120 567 0 0 18 0 18 18 0 8 0 kqueuepl 224 92 0 83 1 0 1 1 0 8 0 pipepl 336 151 0 121 3 0 3 3 0 8 0 fdescpl 520 601 0 566 4 0 4 4 0 8 1 filepl 160 2592 0 2389 11 0 11 11 0 8 2 lockfpl 104 71 0 64 1 0 1 1 0 8 0 lockfspl 48 25 0 21 1 0 1 1 0 8 0 sessionpl 144 33 0 18 1 0 1 1 0 8 0 pgrppl 48 57 0 35 1 0 1 1 0 8 0 ucredpl 104 351 0 334 1 0 1 1 0 8 0 zombiepl 144 566 0 566 1 0 1 1 0 8 1 processpl 1192 619 0 566 5 0 5 5 0 8 0 procpl 656 913 0 849 7 0 7 7 0 8 1 sockpl 728 481 0 452 6 0 6 6 0 8 3 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 115 0 0 15 0 15 15 0 8 0 mcl2k 2048 30 0 0 4 0 4 4 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 253 0 0 16 0 16 16 0 8 0 bufpl 280 2781 0 119 191 0 191 191 0 8 0 anonpl 32 3947 0 0 32 0 32 32 0 246 0 amapchunkpl 152 13800 0 13281 38 0 38 38 0 158 18 amappl16 200 1350 0 1331 5 1 4 4 0 8 2 amappl15 192 10 0 9 1 0 1 1 0 8 0 amappl14 184 104 0 94 1 0 1 1 0 8 0 amappl13 176 5 0 5 2 1 1 1 0 8 1 amappl12 168 1217 0 1183 2 0 2 2 0 8 0 amappl11 160 45 0 34 1 0 1 1 0 8 0 amappl10 152 2 0 2 1 1 0 1 0 8 0 amappl9 144 258 0 258 1 1 0 1 0 8 0 amappl8 136 37 0 36 1 0 1 1 0 8 0 amappl7 128 114 0 104 1 0 1 1 0 8 0 amappl6 120 166 0 163 1 0 1 1 0 8 0 amappl5 112 117 0 111 1 0 1 1 0 8 0 amappl4 104 282 0 267 1 0 1 1 0 8 0 amappl3 96 2445 0 2322 4 0 4 4 0 8 0 amappl2 88 624 0 571 2 0 2 2 0 8 0 amappl1 80 9018 0 8454 14 0 14 14 0 8 0 amappl 88 3960 0 3786 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 72 0 1 2 0 2 2 0 8 0 uaddrrnd 24 601 0 566 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 601 0 566 1 0 1 1 0 8 0 vmmpekpl 168 6620 0 6578 3 0 3 3 0 8 0 vmmpepl 168 43367 0 41337 97 0 97 97 0 357 6 vmsppl 480 600 0 566 7 1 6 6 0 8 1 rwobjpl 72 15717 0 12819 53 0 53 53 0 8 0 pdppl 4096 1210 0 1132 114 32 82 98 0 8 4 pvpl 32 13639 0 0 111 1 110 110 0 265 0 pmappl 256 600 0 566 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 405 0 35 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(ffffffff833dec40) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83962558) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff83962558) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd800883ca78) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800883ca78) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800883ca78) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8063f7df28,0,ffff800034fedc78,ffff800034fedc54,0,2,cf2a6788d1f3466c,ffff800034feded0) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff800034fede98,ffff800034feded0,ffff800034fedd00,ffff800034fedd08) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff800034fede98,ffff800034feded0,ffff800034fede10) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806c183200,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff800034fee020,200000000100) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff800034fee020) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x770e3eda8870, count: -13 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) 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+0xf sys/dev/kcov.c:149 syscall(ffff800035012840) at syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800035012840) at syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7453a5bb5e30, count: 9 ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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+0xf sys/dev/kcov.c:149 syscall(ffff800035012840) at syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800035012840) at syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7453a5bb5e30, count: -6