panic: mtx 0xffffffff83962558: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *221329 25242 32767 0x10 0 0 syz-executor 426245 25242 32767 0x10 0x4000000 1K 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(fffffd800880b1b8) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800880b1b8) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800880b1b8) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8069df9a90,0,ffff80003c49f4f8,ffff80003c49f4d4,0,2,59ef121bd145d9cb,ffff80003c49f750) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c49f718,ffff80003c49f750,ffff80003c49f580,ffff80003c49f588) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003c49f718,ffff80003c49f750,ffff80003c49f690) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806bde83f0,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c49f8a0,200000000000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c49f8a0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x770793e41320, 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(fffffd800880b1b8) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800880b1b8) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800880b1b8) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8069df9a90,0,ffff80003c49f4f8,ffff80003c49f4d4,0,2,59ef121bd145d9cb,ffff80003c49f750) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c49f718,ffff80003c49f750,ffff80003c49f580,ffff80003c49f588) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003c49f718,ffff80003c49f750,ffff80003c49f690) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806bde83f0,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c49f8a0,200000000000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c49f8a0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x770793e41320, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c49f240 rbx 0xffffffff83835dcf cpu_info_full_primary+0x2dcf rdx 0 rcx 0xffff80003c45ccf8 rax 0xffffffff83834ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x7d297f92e18f342e r11 0x1d09e92b8849f662 r12 0xffffffff83835bd0 cpu_info_full_primary+0x2bd0 r13 0 r14 0 r15 0x1 rip 0xffffffff81758355 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c49f230 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=221329 pid=25242 tcnt=3 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=0xffff80003c45ca68,0xffff80003c45c038 process=0xffff8000314052c0 user=0xffff80003c49a000, vmspace=0xfffffd806bde83f0 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *25242 221329 94427 32767 7 0x10 syz-executor 25242 20722 94427 32767 3 0x4000010 biowait syz-executor 25242 426245 94427 32767 7 0x4000010 syz-executor 60777 28577 37376 32767 2 0x10 syz-executor 60777 392104 37376 32767 3 0x4000090 fsleep syz-executor 89447 182478 70629 32767 2 0x10 syz-executor 89447 223239 70629 32767 2 0x4000010 syz-executor 89447 412517 70629 32767 3 0x4000090 kqsel syz-executor 99017 122535 64795 32767 2 0x10 syz-executor 99017 170532 64795 32767 3 0x4000090 lockf syz-executor 99017 307271 64795 32767 3 0x4000090 fsleep syz-executor 85722 509647 85976 32767 3 0x90 nanoslp syz-executor 85722 222244 85976 32767 3 0x4000090 msgwait syz-executor 85722 416297 85976 32767 3 0x4000090 fsleep syz-executor 5996 128874 84 32767 3 0x90 nanoslp syz-executor 5996 489817 84 32767 3 0x4000090 fsleep syz-executor 5996 437224 84 32767 3 0x4000090 kqread syz-executor 5996 121958 84 32767 3 0x4000090 fsleep syz-executor 80276 44668 54880 32767 3 0x90 nanoslp syz-executor 80276 504443 54880 32767 3 0x4000090 ttyout syz-executor 80276 261042 54880 32767 3 0x4000090 ttyout syz-executor 80276 364034 54880 32767 3 0x4000090 ttyout syz-executor 80276 447409 54880 32767 3 0x4000090 fsleep syz-executor 71151 59997 0 0 3 0x14200 bored sosplice 70629 58868 8022 32767 3 0x90 nanoslp syz-executor 85976 457155 64339 32767 3 0x90 nanoslp syz-executor 54880 424365 16465 32767 3 0x90 nanoslp syz-executor 37376 327879 64634 32767 3 0x90 nanoslp syz-executor 94427 259002 25371 32767 3 0x90 nanoslp syz-executor 11522 397367 59009 32767 3 0x90 nanoslp syz-executor 84 408876 65646 32767 3 0x90 nanoslp syz-executor 64795 111608 45524 32767 3 0x90 nanoslp syz-executor 8022 451852 96640 0 3 0x82 wait syz-executor 64339 516012 96640 0 3 0x82 wait syz-executor 64634 117587 96640 0 3 0x82 wait syz-executor 16465 142828 96640 0 3 0x82 wait syz-executor 25371 359181 96640 0 3 0x82 wait syz-executor 59009 477563 96640 0 3 0x82 wait syz-executor 65646 399646 96640 0 3 0x82 wait syz-executor 45524 7641 96640 0 3 0x82 wait syz-executor 96640 359775 53160 0 3 0x82 kqread syz-executor 53160 140969 61322 0 3 0x10008a sigsusp ksh 61322 93920 26251 0 3 0x98 kqread sshd-session 26251 303456 55214 0 3 0x92 kqread sshd-session 27768 29104 1 0 3 0x100083 ttyin getty 55214 312939 1 0 3 0x88 kqread sshd 87882 330707 12486 73 3 0x1100090 kqread syslogd 12486 47208 1 0 3 0x100082 sbwait syslogd 68615 396416 1 0 3 0x100080 kqread resolvd 82059 433041 4277 77 3 0x100092 kqread dhcpleased 88619 488389 4277 77 3 0x100092 kqread dhcpleased 4277 47822 1 0 3 0x80 kqread dhcpleased 17 389644 0 0 3 0x14200 bored smr 98078 313270 0 0 2 0x14200 zerothread 5387 391699 0 0 3 0x14200 aiodoned aiodoned 31708 292366 0 0 3 0x14200 syncer update 32633 241886 0 0 3 0x14200 cleaner cleaner 83433 50254 0 0 3 0x14200 reaper reaper 42762 37196 0 0 3 0x14200 pgdaemon pagedaemon 3460 88771 0 0 3 0x14200 bored viomb 94486 370868 0 0 3 0x40014200 acpi0 acpi0 49958 304022 0 0 3 0x40014200 idle1 29041 386008 0 0 3 0x14200 bored softnet3 62719 89343 0 0 3 0x14200 bored softnet2 70161 51915 0 0 3 0x14200 bored softnet1 386 347613 0 0 3 0x14200 bored softnet0 35070 492635 0 0 3 0x14200 bored systqmp 5109 97859 0 0 3 0x14200 bored systq 78635 419537 0 0 3 0x14200 tmoslp softclockmp 3354 200484 0 0 3 0x40014200 tmoslp softclock 77757 283589 0 0 3 0x40014200 idle0 1 327629 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 25242 (syz-executor) thread 0xffff80003c45ccf8 (221329) exclusive rwlock uobjlk r = 0 (0xfffffd806bff0de0) #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 25242 (syz-executor) thread 0xffff80003c45c028 (20722) exclusive rrwlock inode r = 0 (0xfffffd806c098c20) #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 25242 (syz-executor) thread 0xffff80003c45dc58 (426245) exclusive rwlock amaplk r = 0 (0xfffffd806bff0c78) #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 uvm_map_clean+0x416 sys/uvm/uvm_map.c:4496 #3 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #4 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838cb378) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #1 syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10183 10954K 10965K 166960K 11260 0 pcb 17 12K 12K 166960K 17 0 rtable 236 6K 6K 166960K 353 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 1 1K 1K 166960K 1 0 counters 64 36K 36K 166960K 64 0 ioctlops 0 0K 2K 166960K 30 0 iov 0 0K 4K 166960K 7 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1334 84K 84K 166960K 1356 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 10 0K 0K 166960K 12 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 26 97K 125K 166960K 222 0 sigio 0 0K 0K 166960K 2 0 proc 58 79K 115K 166960K 479 0 subproc 72 4K 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 45 0 in_multi 99 7K 7K 166960K 103 0 ether_multi 1 0K 0K 166960K 1 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 346 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 278 165K 167K 166960K 3473 0 UVM aobj 11 5K 5K 166960K 11 0 pinsyscall 47 94K 112K 166960K 1217 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 11 0 NDP 11 0K 2K 166960K 27 0 temp 37 8678K 8742K 166960K 3927 0 kqueue 14 22K 26K 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 72 0 69 2 0 2 2 0 8 1 rtentry 176 112 0 1 6 0 6 6 0 8 0 unpcb 144 79 0 63 1 0 1 1 0 8 0 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 808 43 0 37 2 0 2 2 0 8 1 arp 128 18 0 0 1 0 1 1 0 8 0 inpcb 384 144 0 132 3 0 3 3 0 8 1 nd6 144 25 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 455 0 0 29 0 29 29 0 8 0 art_table 32 456 0 0 4 0 4 4 0 8 0 art_node 16 111 0 10 1 0 1 1 0 8 0 semapl 112 8 0 0 1 0 1 1 0 8 0 shmpl 112 8 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1644 0 140 95 0 95 95 0 8 0 ffsino 288 1644 0 140 108 0 108 108 0 8 0 nchpl 144 1936 0 259 63 0 63 63 0 8 0 uvmvnodes 80 1725 0 0 36 0 36 36 0 8 0 vnodes 216 1725 0 0 96 0 96 96 0 8 0 namei 1024 5698 0 5698 1 0 1 1 0 8 1 percpumem 16 47 0 0 1 0 1 1 0 8 0 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 6439 0 6438 4 1 3 3 1 8 2 plimitpl 152 43 0 18 2 0 2 2 0 8 0 sigapl 424 494 0 437 8 0 8 8 0 8 0 futexpl 64 1209 0 1203 1 0 1 1 0 8 0 knotepl 120 251 0 0 8 0 8 8 0 8 0 kqueuepl 224 52 0 35 1 0 1 1 0 8 0 pipepl 336 139 0 111 6 0 6 6 0 8 3 fdescpl 520 475 0 437 4 0 4 4 0 8 0 filepl 160 1844 0 1613 12 0 12 12 0 8 2 lockfpl 104 20 0 15 1 0 1 1 0 8 0 lockfspl 48 12 0 8 1 0 1 1 0 8 0 sessionpl 144 21 0 5 1 0 1 1 0 8 0 pgrppl 48 30 0 6 1 0 1 1 0 8 0 ucredpl 104 180 0 161 1 0 1 1 0 8 0 zombiepl 144 438 0 437 1 0 1 1 0 8 0 processpl 1192 494 0 437 5 0 5 5 0 8 0 procpl 656 648 0 575 7 0 7 7 0 8 0 sockpl 728 329 0 298 6 0 6 6 0 8 2 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 235 0 0 15 0 15 15 0 8 0 bufpl 280 2517 0 117 172 0 172 172 0 8 0 anonpl 32 7334 0 0 60 0 60 60 0 246 0 amapchunkpl 152 10224 0 9585 26 0 26 26 0 158 1 amappl16 200 2079 0 2056 14 0 14 14 0 8 11 amappl15 192 48 0 47 2 1 1 1 0 8 0 amappl14 184 99 0 89 1 0 1 1 0 8 0 amappl13 176 8 0 8 1 1 0 1 0 8 0 amappl12 168 1067 0 1029 2 0 2 2 0 8 0 amappl11 160 45 0 35 1 0 1 1 0 8 0 amappl10 152 2 0 2 1 1 0 1 0 8 0 amappl9 144 246 0 246 1 1 0 1 0 8 0 amappl8 136 36 0 35 1 0 1 1 0 8 0 amappl7 128 88 0 78 1 0 1 1 0 8 0 amappl6 120 185 0 182 1 0 1 1 0 8 0 amappl5 112 116 0 109 1 0 1 1 0 8 0 amappl4 104 273 0 259 1 0 1 1 0 8 0 amappl3 96 1720 0 1570 4 0 4 4 0 8 0 amappl2 88 596 0 539 2 0 2 2 0 8 0 amappl1 80 7976 0 7390 14 0 14 14 0 8 1 amappl 88 2844 0 2633 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 10 0 0 1 0 1 1 0 8 0 uaddrrnd 24 475 0 437 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 475 0 437 1 0 1 1 0 8 0 vmmpekpl 168 5496 0 5461 2 0 2 2 0 8 0 vmmpepl 168 36407 0 34204 105 0 105 105 0 357 9 vmsppl 480 474 0 437 7 1 6 6 0 8 0 rwobjpl 72 14466 0 11839 52 1 51 51 0 8 1 pdppl 4096 958 0 874 108 24 84 98 0 8 0 pvpl 32 14443 0 0 117 0 117 117 0 265 0 pmappl 256 474 0 437 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 397 0 27 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(fffffd800880b1b8) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd800880b1b8) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd800880b1b8) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8069df9a90,0,ffff80003c49f4f8,ffff80003c49f4d4,0,2,59ef121bd145d9cb,ffff80003c49f750) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c49f718,ffff80003c49f750,ffff80003c49f580,ffff80003c49f588) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003c49f718,ffff80003c49f750,ffff80003c49f690) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806bde83f0,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c49f8a0,200000000000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c49f8a0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x770793e41320, 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 mtx_enter(ffffffff83962558) at mtx_enter+0xa7 sys/kern/kern_lock.c:250 uvm_map_clean(fffffd806bde83f0,200000000000,200000003000,4) at uvm_map_clean+0x602 sys/uvm/uvm_map.c:4526 syscall(ffff80003c4ab9f0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4ab9f0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x63fa43fbf60, count: 8 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 mtx_enter(ffffffff83962558) at mtx_enter+0xa7 sys/kern/kern_lock.c:250 uvm_map_clean(fffffd806bde83f0,200000000000,200000003000,4) at uvm_map_clean+0x602 sys/uvm/uvm_map.c:4526 syscall(ffff80003c4ab9f0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4ab9f0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x63fa43fbf60, count: -7