panic: mtx 0xffffffff8390c838: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *322203 10051 32767 0x10 0 1 syz-executor 92419 20516 32767 0x10 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e5df1) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff8390c838) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff8390c838) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd80087eb250) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80087eb250) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80087eb250) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806b25ba20,0,ffff80003c461698,ffff80003c461674,0,2,3e4c393f7d19fa76,ffff80003c4618f0) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c4618b8,ffff80003c4618f0,ffff80003c461720,ffff80003c461728) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003c4618b8,ffff80003c4618f0,ffff80003c461830) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806c06d7b0,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c461a40,200000000100) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c461a40) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7e4d0f9da480, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: mtx 0xffffffff8390c838: locking against myself ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e5df1) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff8390c838) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff8390c838) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd80087eb250) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80087eb250) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80087eb250) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806b25ba20,0,ffff80003c461698,ffff80003c461674,0,2,3e4c393f7d19fa76,ffff80003c4618f0) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c4618b8,ffff80003c4618f0,ffff80003c461720,ffff80003c461728) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003c4618b8,ffff80003c4618f0,ffff80003c461830) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806c06d7b0,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c461a40,200000000100) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c461a40) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7e4d0f9da480, count: -13 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c4613e0 rbx 0xffff8000299eedcf rdx 0 rcx 0xffff80002efeb4a8 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xae7ba370c621d1e r11 0xbe6cfab2045da2fa r12 0xffff8000299eebd0 r13 0 r14 0 r15 0x1 rip 0xffffffff823fd865 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c4613d0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=322203 pid=10051 tcnt=3 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=0xffff80002efeaa68,0xffff80002efea2c8 process=0xffff80002a3d44c0 user=0xffff80003c45c000, vmspace=0xfffffd806c06d7b0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *10051 322203 49399 32767 7 0x10 syz-executor 10051 381752 49399 32767 3 0x4000010 biowait syz-executor 10051 174183 49399 32767 3 0x4000010 uobjlk syz-executor 20516 156801 39503 32767 2 0x10 syz-executor 20516 78606 39503 32767 3 0x4000090 kqpoll syz-executor 20516 92419 39503 32767 7 0x4000010 syz-executor 29602 516068 76925 32767 2 0x10 syz-executor 29602 354775 76925 32767 3 0x4000090 sbwait syz-executor 29602 74029 76925 32767 2 0x4000010 syz-executor 15645 488295 34687 32767 3 0x90 nanoslp syz-executor 15645 482397 34687 32767 3 0x4000090 sbwait syz-executor 15645 469963 34687 32767 3 0x4000090 fsleep syz-executor 15645 450037 34687 32767 3 0x4000090 fsleep syz-executor 23707 428357 0 0 3 0x14200 bored sosplice 39503 302809 19820 32767 3 0x90 nanoslp syz-executor 19567 112518 482 32767 3 0x90 nanoslp syz-executor 45542 322048 30126 32767 3 0x90 nanoslp syz-executor 34687 424222 99745 32767 3 0x90 nanoslp syz-executor 60552 317730 3828 32767 3 0x90 nanoslp syz-executor 49399 333493 7700 32767 3 0x90 nanoslp syz-executor 76925 10005 58505 32767 3 0x90 nanoslp syz-executor 482 282624 33565 0 3 0x82 wait syz-executor 89587 314389 33565 0 3 0x82 wait syz-executor 19820 198383 33565 0 3 0x82 wait syz-executor 30126 488194 33565 0 3 0x82 wait syz-executor 3828 239905 33565 0 3 0x82 wait syz-executor 99745 28111 33565 0 3 0x82 wait syz-executor 7700 386695 33565 0 3 0x82 wait syz-executor 58505 115466 33565 0 3 0x82 wait syz-executor 33565 217207 62050 0 3 0x82 kqread syz-executor 62050 357325 17121 0 3 0x10008a sigsusp ksh 17121 386949 29510 0 3 0x98 kqread sshd-session 29510 232814 51839 0 3 0x92 kqread sshd-session 54535 311685 1 0 3 0x100083 ttyin getty 51839 331591 1 0 3 0x88 kqread sshd 140 432335 9741 73 3 0x1100090 kqread syslogd 9741 412609 1 0 3 0x100082 sbwait syslogd 98787 66661 1 0 3 0x100080 kqread resolvd 73936 186583 99551 77 3 0x100092 kqread dhcpleased 22168 248402 99551 77 3 0x100092 kqread dhcpleased 99551 169228 1 0 3 0x80 kqread dhcpleased 48898 418456 0 0 3 0x14200 bored smr 41250 169097 0 0 2 0x14200 zerothread 92318 170945 0 0 3 0x14200 aiodoned aiodoned 61349 137851 0 0 3 0x14200 syncer update 27904 262307 0 0 3 0x14200 cleaner cleaner 58516 231635 0 0 3 0x14200 reaper reaper 75533 72420 0 0 3 0x14200 pgdaemon pagedaemon 18191 23079 0 0 3 0x14200 bored viomb 24025 216947 0 0 3 0x40014200 acpi0 acpi0 93821 443664 0 0 3 0x40014200 idle1 5440 331501 0 0 3 0x14200 bored softnet3 65142 366623 0 0 3 0x14200 bored softnet2 7426 521110 0 0 3 0x14200 bored softnet1 98157 210687 0 0 3 0x14200 bored softnet0 31496 364024 0 0 3 0x14200 bored systqmp 85098 357506 0 0 3 0x14200 bored systq 93299 5767 0 0 3 0x14200 tmoslp softclockmp 82555 361871 0 0 3 0x40014200 tmoslp softclock 41605 66309 0 0 3 0x40014200 idle0 1 309405 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff8390c848) #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 10051 (syz-executor) thread 0xffff80002efeb4a8 (322203) exclusive rwlock uobjlk r = 0 (0xfffffd80603f0810) #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 (0xffffffff8390c848) #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 10051 (syz-executor) thread 0xffff80002efea2b8 (381752) exclusive rrwlock inode r = 0 (0xfffffd807cf90d40) #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 10051 (syz-executor) thread 0xffff80002efea548 (174183) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839c4b88) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10212 10958K 10965K 166960K 11291 0 pcb 17 12K 12K 166960K 17 0 rtable 238 6K 7K 166960K 369 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 2 1K 1K 166960K 2 0 counters 64 36K 36K 166960K 64 0 ioctlops 0 0K 2K 166960K 33 0 iov 0 0K 8K 166960K 17 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1335 84K 84K 166960K 1371 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 92 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 25 93K 113K 166960K 372 0 sigio 0 0K 0K 166960K 1 0 proc 58 79K 115K 166960K 491 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 50 0 in_multi 99 7K 7K 166960K 105 0 ether_multi 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 1K 166960K 380 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 270 161K 174K 166960K 5024 0 UVM aobj 11 3K 3K 166960K 11 0 pinsyscall 46 92K 107K 166960K 1417 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 15 0 NDP 11 0K 2K 166960K 27 0 temp 43 8680K 8745K 166960K 4738 0 kqueue 13 20K 26K 166960K 68 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 63 0 59 1 0 1 1 0 8 0 rtentry 176 114 0 2 6 0 6 6 0 8 0 unpcb 144 283 0 258 4 0 4 4 0 8 2 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 808 160 0 152 5 0 5 5 0 8 4 arp 128 18 0 0 1 0 1 1 0 8 0 inpcb 384 400 0 388 6 0 6 6 0 8 4 nd6 144 27 0 1 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 256 458 0 2 29 0 29 29 0 8 0 art_table 32 459 0 2 4 0 4 4 0 8 0 art_node 16 113 0 11 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 2 1 0 1 1 0 8 0 semupl 112 3 0 3 1 0 1 1 0 8 1 semapl 112 87 0 77 1 0 1 1 0 8 0 shmpl 112 8 0 0 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1888 0 380 95 0 95 95 0 8 0 ffsino 288 1888 0 380 108 0 108 108 0 8 0 nchpl 144 2385 0 705 63 0 63 63 0 8 0 uvmvnodes 80 1969 0 0 41 0 41 41 0 8 0 vnodes 216 1969 0 0 110 0 110 110 0 8 0 namei 1024 7839 0 7839 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 7966 0 7964 9 1 8 8 1 8 7 plimitpl 152 147 0 121 2 0 2 2 0 8 0 sigapl 424 657 0 601 7 0 7 7 0 8 0 futexpl 64 3337 0 3335 1 0 1 1 0 8 0 knotepl 120 313 0 0 10 0 10 10 0 8 0 kqueuepl 224 157 0 147 1 0 1 1 0 8 0 pipepl 336 155 0 128 5 0 5 5 0 8 2 fdescpl 520 638 0 601 3 0 3 3 0 8 0 filepl 160 3380 0 3148 14 0 14 14 0 8 3 lockfpl 104 79 0 76 1 0 1 1 0 8 0 lockfspl 48 30 0 27 1 0 1 1 0 8 0 sessionpl 144 25 0 9 1 0 1 1 0 8 0 pgrppl 48 34 0 10 1 0 1 1 0 8 0 ucredpl 104 498 0 479 1 0 1 1 0 8 0 zombiepl 144 605 0 601 1 0 1 1 0 8 0 processpl 1192 657 0 601 5 0 5 5 0 8 0 procpl 656 1080 0 1015 7 0 7 7 0 8 1 sockpl 728 754 0 713 9 0 9 9 0 8 4 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 113 0 0 15 0 15 15 0 8 0 mcl2k 2048 34 0 0 5 0 5 5 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 271 0 0 17 0 17 17 0 8 0 bufpl 280 2622 0 117 179 0 179 179 0 8 0 anonpl 32 6412 0 0 52 0 52 52 0 246 0 amapchunkpl 152 15105 0 14497 29 0 29 29 0 158 5 amappl16 200 2262 0 2236 10 0 10 10 0 8 6 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 113 0 103 1 0 1 1 0 8 0 amappl13 176 9 0 9 1 1 0 1 0 8 0 amappl12 168 1250 0 1212 2 0 2 2 0 8 0 amappl11 160 43 0 33 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 247 0 247 1 1 0 1 0 8 0 amappl8 136 23 0 22 1 0 1 1 0 8 0 amappl7 128 97 0 87 1 0 1 1 0 8 0 amappl6 120 174 0 171 1 0 1 1 0 8 0 amappl5 112 113 0 106 1 0 1 1 0 8 0 amappl4 104 300 0 283 1 0 1 1 0 8 0 amappl3 96 2816 0 2674 4 0 4 4 0 8 0 amappl2 88 641 0 587 2 0 2 2 0 8 0 amappl1 80 9715 0 9136 14 0 14 14 0 8 0 amappl 88 4308 0 4105 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 24 638 0 601 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 638 0 601 1 0 1 1 0 8 0 vmmpekpl 168 7089 0 7055 3 0 3 3 0 8 0 vmmpepl 168 46970 0 44825 102 0 102 102 0 357 3 vmsppl 480 637 0 601 7 1 6 6 0 8 0 rwobjpl 72 17521 0 14663 54 0 54 54 0 8 0 pdppl 4096 1284 0 1202 118 32 86 92 0 8 4 pvpl 32 14572 0 0 120 2 118 118 0 265 0 pmappl 256 637 0 601 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 412 0 35 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837d7ff0) 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(ffffffff839c4980) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839c4980) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80003c45b4f0,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff839c4980) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839c4980) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff80003c45b6c0) at syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c45b6c0) at syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf9d3fb1d260, count: 6 ddb{0}> trace x86_ipi_db(ffffffff837d7ff0) 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(ffffffff839c4980) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839c4980) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80003c45b4f0,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff839c4980) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839c4980) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff80003c45b6c0) at syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c45b6c0) at syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf9d3fb1d260, count: -9 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e5df1) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff8390c838) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff8390c838) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd80087eb250) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80087eb250) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80087eb250) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806b25ba20,0,ffff80003c461698,ffff80003c461674,0,2,3e4c393f7d19fa76,ffff80003c4618f0) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c4618b8,ffff80003c4618f0,ffff80003c461720,ffff80003c461728) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003c4618b8,ffff80003c4618f0,ffff80003c461830) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806c06d7b0,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c461a40,200000000100) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c461a40) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7e4d0f9da480, count: 2 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e5df1) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff8390c838) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff8390c838) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd80087eb250) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80087eb250) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80087eb250) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806b25ba20,0,ffff80003c461698,ffff80003c461674,0,2,3e4c393f7d19fa76,ffff80003c4618f0) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c4618b8,ffff80003c4618f0,ffff80003c461720,ffff80003c461728) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003c4618b8,ffff80003c4618f0,ffff80003c461830) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806c06d7b0,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c461a40,200000000100) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c461a40) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7e4d0f9da480, count: -13