panic: mtx 0xffffffff8393dcd8: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *137771 43320 32767 0x10 0 0 syz-executor 522323 38945 32767 0x10 0 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833d2c82) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff8393dcd8) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff8393dcd8) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd8007d81f40) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8007d81f40) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8007d81f40) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806c0bb1c8,0,ffff80003acf1758,ffff80003acf1734,0,2,58faa910401f99f1,ffff80003acf19b0) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003acf1978,ffff80003acf19b0,ffff80003acf17e0,ffff80003acf17e8) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003acf1978,ffff80003acf19b0,ffff80003acf18f0) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806bfdcae0,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003acf1b00,200000000100) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003acf1b00) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7ebdb9254ba0, 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 0xffffffff8393dcd8: locking against myself ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833d2c82) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff8393dcd8) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff8393dcd8) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd8007d81f40) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8007d81f40) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8007d81f40) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806c0bb1c8,0,ffff80003acf1758,ffff80003acf1734,0,2,58faa910401f99f1,ffff80003acf19b0) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003acf1978,ffff80003acf19b0,ffff80003acf17e0,ffff80003acf17e8) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003acf1978,ffff80003acf19b0,ffff80003acf18f0) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806bfdcae0,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003acf1b00,200000000100) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003acf1b00) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7ebdb9254ba0, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003acf14a0 rbx 0xffffffff83828dc7 cpu_info_full_primary+0x2dc7 rdx 0 rcx 0xffff80003c5422c0 rax 0xffffffff83827ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x3fd214aae4c62ff4 r11 0x88d714cb3d5530 r12 0xffffffff83828bc8 cpu_info_full_primary+0x2bc8 r13 0 r14 0 r15 0x1 rip 0xffffffff81013155 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003acf1490 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=137771 pid=43320 tcnt=4 stat=onproc flags process=10 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c542a70,0xffff80003c542040 process=0xffff80002a48a4d8 user=0xffff80003acec000, vmspace=0xfffffd806bfdcae0 estcpu=36, cpticks=4, pctcpu=0.0, user=4, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 68381 45179 49486 32767 2 0x10 syz-executor 68381 21201 49486 32767 2 0x4000010 syz-executor *43320 137771 16402 32767 7 0x10 syz-executor 43320 137424 16402 32767 3 0x4000090 ttyin syz-executor 43320 514988 16402 32767 3 0x4000010 biowait syz-executor 43320 342241 16402 32767 3 0x4000010 uobjlk syz-executor 38945 522323 72935 32767 7 0x10 syz-executor 38945 96331 72935 32767 3 0x4000090 ttyout syz-executor 38945 55166 72935 32767 3 0x4000090 ttyout syz-executor 38945 402941 72935 32767 2 0x4000010 syz-executor 38945 67056 72935 32767 2 0x4000010 syz-executor 98781 240602 91728 0 3 0x82 sbwait sshd-session 92636 419841 59238 32767 3 0x90 nanoslp syz-executor 92636 195959 59238 32767 3 0x4000090 msgwait syz-executor 92636 13467 59238 32767 3 0x4000090 fsleep syz-executor 44326 276177 0 0 3 0x14200 bored sosplice 49858 239128 56618 32767 3 0x90 nanoslp syz-executor 49858 28164 56618 32767 3 0x4000090 kqsel syz-executor 49858 147899 56618 32767 3 0x4000090 fsleep syz-executor 49858 157071 56618 32767 3 0x4000090 fsleep syz-executor 18460 282494 96224 32767 3 0x90 nanoslp syz-executor 18460 13207 96224 32767 3 0x4000090 ttyin syz-executor 18460 109822 96224 32767 3 0x4000090 fsleep syz-executor 53746 207333 72182 32767 3 0x90 nanoslp syz-executor 53746 108861 72182 32767 3 0x4000090 msgwait syz-executor 53746 164409 72182 32767 3 0x4000090 fsleep syz-executor 56618 34012 51703 32767 3 0x90 nanoslp syz-executor 59222 442272 17956 32767 3 0x90 nanoslp syz-executor 59238 448213 7274 32767 3 0x90 nanoslp syz-executor 16402 428496 37141 32767 3 0x90 nanoslp syz-executor 96224 255299 3391 32767 3 0x90 nanoslp syz-executor 49486 159877 68628 32767 3 0x90 nanoslp syz-executor 72182 168761 87389 32767 3 0x90 nanoslp syz-executor 72935 179617 25767 32767 3 0x90 nanoslp syz-executor 17956 442469 71154 0 3 0x82 wait syz-executor 51703 430323 71154 0 3 0x82 wait syz-executor 7274 438223 71154 0 3 0x82 wait syz-executor 37141 16727 71154 0 3 0x82 wait syz-executor 68628 138427 71154 0 3 0x82 wait syz-executor 87389 383197 71154 0 3 0x82 wait syz-executor 25767 12823 71154 0 3 0x82 wait syz-executor 3391 130306 71154 0 3 0x82 wait syz-executor 71154 505545 75468 0 3 0x82 kqread syz-executor 75468 80607 81452 0 3 0x10008a sigsusp ksh 81452 447314 3158 0 3 0x98 kqread sshd-session 3158 402430 91728 0 3 0x92 kqread sshd-session 37045 210761 1 0 3 0x100083 ttyin getty 91728 51323 1 0 3 0x88 kqread sshd 43548 327049 57687 73 3 0x1100090 kqread syslogd 57687 237905 1 0 3 0x100082 sbwait syslogd 91887 137905 1 0 3 0x100080 kqread resolvd 61510 360998 94516 77 3 0x100092 kqread dhcpleased 4672 489953 94516 77 3 0x100092 kqread dhcpleased 94516 445199 1 0 3 0x80 kqread dhcpleased 1342 242785 0 0 3 0x14200 bored smr 53334 59446 0 0 2 0x14200 zerothread 43151 47183 0 0 3 0x14200 aiodoned aiodoned 46143 476573 0 0 3 0x14200 syncer update 2981 436752 0 0 3 0x14200 cleaner cleaner 29323 438277 0 0 3 0x14200 reaper reaper 6557 151444 0 0 3 0x14200 pgdaemon pagedaemon 6996 130165 0 0 3 0x14200 bored viomb 93825 320657 0 0 3 0x40014200 acpi0 acpi0 62275 279588 0 0 3 0x40014200 idle1 39024 155810 0 0 3 0x14200 bored softnet3 27307 460350 0 0 3 0x14200 bored softnet2 56650 27846 0 0 3 0x14200 bored softnet1 31787 251114 0 0 3 0x14200 bored softnet0 27998 421735 0 0 3 0x14200 bored systqmp 68559 4757 0 0 3 0x14200 bored systq 89811 19743 0 0 3 0x14200 tmoslp softclockmp 93079 158073 0 0 3 0x40014200 tmoslp softclock 65599 310682 0 0 3 0x40014200 idle0 1 221793 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 (0xffffffff8393dce8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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 43320 (syz-executor) thread 0xffff80003c5422c0 (137771) exclusive rwlock uobjlk r = 0 (0xfffffd806bf76128) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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 (0xffffffff8393dce8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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 43320 (syz-executor) thread 0xffff80003c542f90 (514988) exclusive rrwlock inode r = 0 (0xfffffd806bd239a0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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 43320 (syz-executor) thread 0xffff80003c543220 (342241) exclusive rwlock vmmaplk r = 0 (0xfffffd806bfdcbe0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5250 #3 uvm_map_clean+0x11b sys/uvm/uvm_map.c:4448 #4 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83909610) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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 10186 10954K 10965K 166960K 11263 0 pcb 17 12K 12K 166960K 17 0 rtable 238 6K 6K 166960K 356 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 32 0 iov 0 0K 8K 166960K 2 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1334 84K 84K 166960K 1351 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 26 97K 121K 166960K 190 0 sigio 0 0K 0K 166960K 2 0 proc 58 79K 103K 166960K 476 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 1 0K 0K 166960K 17 0 in_multi 99 7K 7K 166960K 103 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 358 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 284 177K 177K 166960K 3217 0 UVM aobj 7 2K 2K 166960K 7 0 pinsyscall 49 98K 111K 166960K 1235 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 7 0 NDP 19 1K 2K 166960K 27 0 temp 41 8679K 8743K 166960K 3937 0 kqueue 14 22K 26K 166960K 37 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 39 0 36 1 0 1 1 0 8 0 rtentry 168 113 0 1 5 0 5 5 0 8 0 unpcb 144 234 0 180 6 0 6 6 0 8 3 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 808 31 0 24 1 0 1 1 0 8 0 arp 120 18 0 0 1 0 1 1 0 8 0 inpcb 376 115 0 102 2 0 2 2 0 8 0 nd6 136 26 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 256 456 0 0 29 0 29 29 0 8 0 art_table 32 457 0 0 4 0 4 4 0 8 0 art_node 16 112 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1609 0 105 95 0 95 95 0 8 0 ffsino 280 1609 0 105 108 0 108 108 0 8 0 nchpl 144 1855 0 179 63 0 63 63 0 8 0 uvmvnodes 80 1690 0 0 35 0 35 35 0 8 0 vnodes 216 1690 0 0 94 0 94 94 0 8 0 namei 1024 5650 0 5650 1 0 1 1 0 8 1 percpumem 16 46 0 0 1 0 1 1 0 8 0 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 5979 0 5977 2 0 2 2 1 8 1 plimitpl 152 43 0 17 2 0 2 2 0 8 1 sigapl 424 476 0 418 8 0 8 8 0 8 0 futexpl 64 747 0 742 1 0 1 1 0 8 0 knotepl 120 308 0 0 10 0 10 10 0 8 0 kqueuepl 216 169 0 159 5 0 5 5 0 8 4 pipepl 328 107 0 79 3 0 3 3 0 8 0 fdescpl 504 457 0 418 7 1 6 6 0 8 1 filepl 152 2021 0 1758 14 0 14 14 0 8 3 lockfpl 104 14 0 11 1 0 1 1 0 8 0 lockfspl 48 8 0 5 1 0 1 1 0 8 0 sessionpl 144 23 0 6 1 0 1 1 0 8 0 pgrppl 48 31 0 6 1 0 1 1 0 8 0 ucredpl 104 162 0 143 1 0 1 1 0 8 0 zombiepl 144 419 0 418 1 0 1 1 0 8 0 processpl 1176 476 0 418 5 0 5 5 0 8 0 procpl 656 570 0 495 7 0 7 7 0 8 0 sockpl 688 389 0 319 15 0 15 15 0 8 8 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 115 0 0 15 0 15 15 0 8 0 mcl2k 2048 24 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 300 0 0 19 0 19 19 0 8 0 bufpl 280 2291 0 117 156 0 156 156 0 8 0 anonpl 24 105057 0 101516 23 0 23 23 0 184 1 amapchunkpl 152 9598 0 8967 28 0 28 28 0 158 3 amappl16 200 2138 0 2117 5 0 5 5 0 8 3 amappl15 192 7 0 7 1 0 1 1 0 8 1 amappl14 184 106 0 95 1 0 1 1 0 8 0 amappl13 176 13 0 13 1 0 1 1 0 8 1 amappl12 168 1071 0 1032 2 0 2 2 0 8 0 amappl11 160 46 0 35 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 0 1 1 0 8 1 amappl9 144 249 0 248 1 0 1 1 0 8 0 amappl8 136 24 0 23 1 0 1 1 0 8 0 amappl7 128 97 0 86 1 0 1 1 0 8 0 amappl6 120 179 0 175 1 0 1 1 0 8 0 amappl5 112 113 0 107 1 0 1 1 0 8 0 amappl4 104 303 0 289 1 0 1 1 0 8 0 amappl3 96 1538 0 1392 4 0 4 4 0 8 0 amappl2 88 619 0 559 2 0 2 2 0 8 0 amappl1 80 8572 0 7908 14 0 14 14 0 8 0 amappl 88 2554 0 2343 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 6 0 0 1 0 1 1 0 8 0 uaddrrnd 24 457 0 418 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 457 0 418 1 0 1 1 0 8 0 vmmpekpl 168 5406 0 5372 2 0 2 2 0 8 0 vmmpepl 168 36115 0 33794 102 0 102 102 0 357 1 vmsppl 456 456 0 418 7 1 6 6 0 8 0 rwobjpl 64 14763 0 12107 43 0 43 43 0 8 0 pdppl 4096 922 0 836 114 20 94 96 0 8 8 pvpl 32 10682 0 0 87 0 87 87 0 265 0 pmappl 248 456 0 418 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 294 0 23 8 0 8 8 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(ffffffff833d2c82) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff8393dcd8) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff8393dcd8) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd8007d81f40) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8007d81f40) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8007d81f40) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806c0bb1c8,0,ffff80003acf1758,ffff80003acf1734,0,2,58faa910401f99f1,ffff80003acf19b0) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003acf1978,ffff80003acf19b0,ffff80003acf17e0,ffff80003acf17e8) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003acf1978,ffff80003acf19b0,ffff80003acf18f0) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806bfdcae0,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003acf1b00,200000000100) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003acf1b00) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7ebdb9254ba0, count: -13 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029a9bff0) 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 end of kernel end trace frame: 0x730e0c38fc40, count: 12 ddb{1}> trace x86_ipi_db(ffff800029a9bff0) 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 end of kernel end trace frame: 0x730e0c38fc40, count: -3