panic: mtx 0xffffffff83984a60: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *279296 44669 0 0 0 1 syz-executor 131151 44669 0 0 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833cab57) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83984a60) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff83984a60) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd8007d4ace0) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8007d4ace0) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8066119a50,0,ffff80003c4eda28,ffff80003c4eda04,0,2,feb714c029cf99ca,ffff80003c4edc80) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c4edc48,ffff80003c4edc80,ffff80003c4edab0,ffff80003c4edab8) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003c4edc48,ffff80003c4edc80,ffff80003c4edbc0) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806be77c90,400000000000,0,2) at uvm_fault+0x272 upageflttrap(ffff80003c4eddd0,400000000c00) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c4eddd0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x75d478bbffe0, 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 0xffffffff83984a60: locking against myself ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833cab57) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83984a60) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff83984a60) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd8007d4ace0) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8007d4ace0) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8066119a50,0,ffff80003c4eda28,ffff80003c4eda04,0,2,feb714c029cf99ca,ffff80003c4edc80) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c4edc48,ffff80003c4edc80,ffff80003c4edab0,ffff80003c4edab8) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003c4edc48,ffff80003c4edc80,ffff80003c4edbc0) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806be77c90,400000000000,0,2) at uvm_fault+0x272 upageflttrap(ffff80003c4eddd0,400000000c00) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c4eddd0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x75d478bbffe0, count: -13 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c4ed770 rbx 0xffff800029a9cdc7 rdx 0 rcx 0xffff8000ffffa7d0 rax 0xffff800029a9bff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xd428be6768c7fd9a r11 0x215f01cc0060bac4 r12 0xffff800029a9cbc8 r13 0 r14 0 r15 0x1 rip 0xffffffff8311a8a5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c4ed760 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=279296 pid=44669 tcnt=4 stat=onproc flags process=0 proc=0 runpri=50, usrpri=50, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000350aaa70,0xffff8000ffffad00 process=0xffff8000350ac950 user=0xffff80003c4e8000, vmspace=0xfffffd806be77c90 estcpu=36, cpticks=1, pctcpu=0.0, user=1, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *44669 279296 62921 0 7 0 syz-executor 44669 77768 62921 0 3 0x4000000 uobjlk syz-executor 44669 196312 62921 0 3 0x4000000 biowait syz-executor 44669 131151 62921 0 7 0x4000000 syz-executor 6560 402508 49391 60928 2 0x10 syz-executor 6560 478016 49391 60928 3 0x4000090 sbwait syz-executor 8512 280926 9660 0 3 0x80 nanoslp syz-executor 8512 279609 9660 0 3 0x4000080 kqsel syz-executor 8512 504940 9660 0 3 0x4000080 fsleep syz-executor 62692 457243 67562 0 3 0x80 nanoslp syz-executor 62692 252295 67562 0 3 0x4000080 kqsel syz-executor 62692 463845 67562 0 3 0x4000080 fsleep syz-executor 5606 15538 40497 -1 3 0x90 nanoslp syz-executor 5606 498157 40497 -1 3 0x4000090 fsleep syz-executor 5606 14382 40497 -1 3 0x4000090 kqread syz-executor 88504 12242 0 0 3 0x14200 acct acct 33660 153108 57264 0 3 0x80 nanoslp syz-executor 33660 143096 57264 0 3 0x4000080 kqpoll syz-executor 33660 344150 57264 0 3 0x4000080 fsleep syz-executor 79733 100793 0 0 3 0x14200 bored sosplice 89851 114246 81038 0 3 0x82 wait syz-executor 40405 445484 81038 0 3 0x82 nanoslp syz-executor 9660 193641 81038 0 3 0x82 nanoslp syz-executor 57264 220168 81038 0 3 0x82 nanoslp syz-executor 49391 6295 81038 0 3 0x82 nanoslp syz-executor 67562 349426 81038 0 3 0x82 nanoslp syz-executor 40497 76761 81038 0 3 0x82 nanoslp syz-executor 62921 295810 81038 0 3 0x82 nanoslp syz-executor 81038 71268 47425 0 3 0x82 kqread syz-executor 47425 6959 1256 0 3 0x10008a sigsusp ksh 1256 46395 72827 0 3 0x98 kqread sshd-session 72827 493680 62361 0 3 0x92 kqread sshd-session 18601 179809 1 0 3 0x100083 ttyin getty 62361 212136 1 0 3 0x88 kqread sshd 40026 140067 47307 74 3 0x1100092 bpf pflogd 47307 383270 1 0 3 0x80 sbwait pflogd 34297 119937 93997 73 3 0x1100090 kqread syslogd 93997 173629 1 0 3 0x100082 sbwait syslogd 69523 48502 1 0 3 0x100080 kqread resolvd 1607 69573 49659 77 3 0x100092 kqread dhcpleased 57250 25033 49659 77 3 0x100092 kqread dhcpleased 49659 367581 1 0 3 0x80 kqread dhcpleased 8912 347540 0 0 3 0x14200 bored smr 42885 351579 0 0 2 0x14200 zerothread 68433 39174 0 0 3 0x14200 aiodoned aiodoned 96453 418027 0 0 3 0x14200 syncer update 26970 323153 0 0 3 0x14200 cleaner cleaner 24511 417603 0 0 3 0x14200 reaper reaper 9278 111079 0 0 3 0x14200 pgdaemon pagedaemon 29639 283764 0 0 3 0x14200 bored viomb 1394 345865 0 0 3 0x40014200 acpi0 acpi0 65871 469871 0 0 3 0x40014200 idle1 11236 200514 0 0 3 0x14200 bored softnet3 60928 308098 0 0 3 0x14200 bored softnet2 44368 484959 0 0 3 0x14200 bored softnet1 1049 423432 0 0 3 0x14200 bored softnet0 98129 425592 0 0 3 0x14200 bored systqmp 84911 404698 0 0 3 0x14200 bored systq 83426 359754 0 0 3 0x14200 tmoslp softclockmp 25253 485397 0 0 3 0x40014200 tmoslp softclock 99593 242640 0 0 3 0x40014200 idle0 1 329380 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 (0xffffffff83984a70) #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 #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 #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 44669 (syz-executor) thread 0xffff8000ffffa7d0 (279296) exclusive rwlock uobjlk r = 0 (0xfffffd8062003f18) #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 #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 (0xffffffff83984a70) #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 #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 #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 44669 (syz-executor) thread 0xffff8000ffffacf0 (77768) exclusive rwlock vmmaplk r = 0 (0xfffffd806be77d90) #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 (0xffffffff83986bf8) #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 Process 44669 (syz-executor) thread 0xffff8000ffffa020 (196312) exclusive rrwlock inode r = 0 (0xfffffd806de30518) #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10216 11030K 11353K 166960K 11635 0 pcb 17 13K 14K 166960K 92 0 rtable 204 6K 6K 166960K 359 0 pf 33 17K 19K 166960K 122 0 ifaddr 38 6K 7K 166960K 53 0 ifgroup 51 2K 2K 166960K 63 0 sysctl 3 1K 1K 166960K 3 0 counters 62 36K 36K 166960K 76 0 ioctlops 0 0K 4K 166960K 1579 0 iov 0 0K 12K 166960K 46 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1462 92K 92K 166960K 1645 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 11 0K 0K 166960K 11 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 89K 166960K 325 0 sigio 1 0K 0K 166960K 40 0 proc 72 91K 128K 166960K 563 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 25 0 in_multi 87 6K 7K 166960K 111 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 223 996K 996K 166960K 223 0 exec 0 0K 1K 166960K 384 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 236 73K 86K 166960K 4573 0 UVM aobj 4 2K 2K 166960K 5 0 pinsyscall 43 86K 103K 166960K 1403 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 13 0 NDP 11 0K 2K 166960K 33 0 temp 47 8680K 8744K 166960K 12730 0 kqueue 16 26K 28K 166960K 56 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 38 0 35 1 0 1 1 0 8 0 rtentry 160 114 0 21 5 0 5 5 0 8 0 unpcb 144 271 0 249 6 0 6 6 0 8 5 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 808 187 0 181 8 0 8 8 0 8 7 arp 120 18 0 6 1 0 1 1 0 8 0 inpcb 376 389 0 379 9 0 9 9 0 8 7 nd6 136 25 0 4 1 0 1 1 0 8 0 pkpcb 40 7 0 7 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1168 6 0 6 1 0 1 1 0 8 1 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pffrag 232 4 0 1 1 0 1 1 0 482 0 pffrnode 88 3 0 1 1 0 1 1 0 8 0 pffrent 40 10 0 7 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 30 0 0 1 0 1 1 0 8 0 pfstkey 128 34 0 4 1 0 1 1 0 8 0 pfstate 376 32 0 2 3 0 3 3 0 8 0 pfrule 1344 88 0 83 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 457 0 52 28 0 28 28 0 8 1 art_table 32 458 0 52 4 0 4 4 0 8 0 art_node 16 113 0 29 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 1 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 9 0 0 1 0 1 1 0 8 0 shmpl 112 2 0 1 1 0 1 1 0 8 0 dirhash 1024 24 0 7 3 0 3 3 0 8 0 dino2pl 256 1945 0 436 95 0 95 95 0 8 0 ffsino 280 1945 0 436 109 0 109 109 0 8 1 nchpl 144 2381 0 690 63 0 63 63 0 8 0 rtmask 32 1 0 1 1 0 1 1 0 8 1 uvmvnodes 80 2247 0 0 46 0 46 46 0 8 0 vnodes 216 2247 0 0 125 0 125 125 0 8 0 namei 1024 8229 0 8229 2 0 2 2 0 8 2 percpumem 16 52 0 7 1 0 1 1 0 8 0 kstatmem 264 32 0 10 2 0 2 2 0 8 0 scxspl 216 7531 0 7529 3 2 1 2 1 8 0 plimitpl 152 91 0 73 1 0 1 1 0 8 0 sigapl 424 625 0 573 8 1 7 7 0 8 1 futexpl 64 3289 0 3285 1 0 1 1 0 8 0 knotepl 120 424 0 0 13 0 13 13 0 8 0 kqueuepl 216 92 0 75 1 0 1 1 0 8 0 pipepl 328 184 0 157 6 0 6 6 0 8 3 fdescpl 504 605 0 573 5 0 5 5 0 8 0 filepl 152 3421 0 3129 19 1 18 19 0 8 6 lockfpl 104 191 0 124 2 0 2 2 0 8 0 lockfspl 48 24 0 21 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 101 0 84 1 0 1 1 0 8 0 ucredpl 104 329 0 313 1 0 1 1 0 8 0 zombiepl 144 575 0 573 1 0 1 1 0 8 0 processpl 1176 625 0 573 5 0 5 5 0 8 0 procpl 656 954 0 890 7 1 6 6 0 8 0 srpgc 96 2 0 2 1 0 1 1 0 8 1 sockpl 688 710 0 674 22 11 11 22 0 8 7 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 109 0 0 14 0 14 14 0 8 0 mcl2k 2048 22 0 0 3 0 3 3 0 8 0 mtagpl 96 24 0 0 1 0 1 1 0 8 0 mbufpl 256 154 0 0 10 0 10 10 0 8 0 bufpl 280 2644 0 130 180 0 180 180 0 8 0 anonpl 24 116511 0 113026 29 0 29 29 0 184 5 amapchunkpl 152 14507 0 13985 33 0 33 33 0 158 12 amappl16 200 2310 0 2278 6 0 6 6 0 8 4 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 122 0 110 1 0 1 1 0 8 0 amappl13 176 7 0 7 1 1 0 1 0 8 0 amappl12 168 1241 0 1209 3 1 2 2 0 8 0 amappl11 160 104 0 88 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 246 0 246 1 1 0 1 0 8 0 amappl8 136 57 0 55 1 0 1 1 0 8 0 amappl7 128 104 0 92 1 0 1 1 0 8 0 amappl6 120 181 0 177 1 0 1 1 0 8 0 amappl5 112 121 0 112 1 0 1 1 0 8 0 amappl4 104 316 0 295 1 0 1 1 0 8 0 amappl3 96 2554 0 2434 4 0 4 4 0 8 1 amappl2 88 635 0 573 2 0 2 2 0 8 0 amappl1 80 8258 0 7681 15 1 14 14 0 8 1 amappl 88 4203 0 4024 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 4 0 1 1 0 1 1 0 8 0 uaddrrnd 24 605 0 573 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 605 0 573 1 0 1 1 0 8 0 vmmpekpl 168 6814 0 6779 3 0 3 3 0 8 1 vmmpepl 168 43406 0 41476 87 0 87 87 0 357 3 vmsppl 456 604 0 573 5 0 5 5 0 8 1 rwobjpl 64 17070 0 13877 52 0 52 52 0 8 0 pdppl 4096 1218 0 1146 96 24 72 86 0 8 0 pvpl 32 11937 0 0 97 0 97 97 0 265 0 pmappl 248 604 0 573 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 272 0 26 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8383dff0) 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(ffffffff839869f0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839869f0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80003c527590,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_const_cmp4(0,0) at __sanitizer_cov_trace_const_cmp4+0x35 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_const_cmp4(0,0) at __sanitizer_cov_trace_const_cmp4+0x35 sys/dev/kcov.c:230 mtx_enter_try(fffffd806be77de0) at mtx_enter_try+0x52 sys/kern/kern_lock.c:262 mtx_enter(fffffd806be77de0) at mtx_enter+0x60 sys/kern/kern_lock.c:239 msleep(fffffd806be77cc0,fffffd806be77de0,4,ffffffff835a1020,0) at msleep+0x2cf sys/kern/kern_synch.c:237 vm_map_lock_ln(fffffd806be77c90,ffffffff83387222,742) at vm_map_lock_ln+0xc4 sys/uvm/uvm_map.c:5243 uvmfault_lookup(ffff80003c5279d8,1) at uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1858 uvm_fault_check(ffff80003c5279d8,ffff80003c527a10,ffff80003c527a40,0) at uvm_fault_check+0x987 uvmfault_amapcopy sys/uvm/uvm_fault.c:235 [inline] uvm_fault_check(ffff80003c5279d8,ffff80003c527a10,ffff80003c527a40,0) at uvm_fault_check+0x987 sys/uvm/uvm_fault.c:772 uvm_fault(fffffd806be77c90,3317fcf5000,0,2) at uvm_fault+0x106 sys/uvm/uvm_fault.c:666 end trace frame: 0xffff80003c527b00, count: 0 ddb{0}> trace x86_ipi_db(ffffffff8383dff0) 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(ffffffff839869f0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839869f0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80003c527590,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_const_cmp4(0,0) at __sanitizer_cov_trace_const_cmp4+0x35 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_const_cmp4(0,0) at __sanitizer_cov_trace_const_cmp4+0x35 sys/dev/kcov.c:230 mtx_enter_try(fffffd806be77de0) at mtx_enter_try+0x52 sys/kern/kern_lock.c:262 mtx_enter(fffffd806be77de0) at mtx_enter+0x60 sys/kern/kern_lock.c:239 msleep(fffffd806be77cc0,fffffd806be77de0,4,ffffffff835a1020,0) at msleep+0x2cf sys/kern/kern_synch.c:237 vm_map_lock_ln(fffffd806be77c90,ffffffff83387222,742) at vm_map_lock_ln+0xc4 sys/uvm/uvm_map.c:5243 uvmfault_lookup(ffff80003c5279d8,1) at uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1858 uvm_fault_check(ffff80003c5279d8,ffff80003c527a10,ffff80003c527a40,0) at uvm_fault_check+0x987 uvmfault_amapcopy sys/uvm/uvm_fault.c:235 [inline] uvm_fault_check(ffff80003c5279d8,ffff80003c527a10,ffff80003c527a40,0) at uvm_fault_check+0x987 sys/uvm/uvm_fault.c:772 uvm_fault(fffffd806be77c90,3317fcf5000,0,2) at uvm_fault+0x106 sys/uvm/uvm_fault.c:666 upageflttrap(ffff80003c527b60,3317fcf5948) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c527b60) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end trace frame: 0x0, count: -17 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(ffffffff833cab57) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83984a60) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff83984a60) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd8007d4ace0) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8007d4ace0) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8066119a50,0,ffff80003c4eda28,ffff80003c4eda04,0,2,feb714c029cf99ca,ffff80003c4edc80) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c4edc48,ffff80003c4edc80,ffff80003c4edab0,ffff80003c4edab8) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003c4edc48,ffff80003c4edc80,ffff80003c4edbc0) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806be77c90,400000000000,0,2) at uvm_fault+0x272 upageflttrap(ffff80003c4eddd0,400000000c00) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c4eddd0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x75d478bbffe0, count: 2 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833cab57) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83984a60) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff83984a60) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd8007d4ace0) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8007d4ace0) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8066119a50,0,ffff80003c4eda28,ffff80003c4eda04,0,2,feb714c029cf99ca,ffff80003c4edc80) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c4edc48,ffff80003c4edc80,ffff80003c4edab0,ffff80003c4edab8) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80003c4edc48,ffff80003c4edc80,ffff80003c4edbc0) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806be77c90,400000000000,0,2) at uvm_fault+0x272 upageflttrap(ffff80003c4eddd0,400000000c00) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c4eddd0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x75d478bbffe0, count: -13