panic: mtx 0xffffffff839bd848: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 63493 56798 32767 0x10 0 0 syz-executor 492279 18711 0 0x2 0 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833dc0d5) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839bd848) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff839bd848) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd80081bcd40) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80081bcd40) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80081bcd40) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806214e5d8,0,ffff80002b42a2f8,ffff80002b42a2d4,0,2,cd2fa48afbd489e3,ffff80002b42a550) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80002b42a518,ffff80002b42a550,ffff80002b42a380,ffff80002b42a388) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80002b42a518,ffff80002b42a550,ffff80002b42a490) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806c00f980,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80002b42a6a0,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80002b42a6a0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x733015d0afd0, 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 0xffffffff839bd848: locking against myself ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833dc0d5) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839bd848) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff839bd848) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd80081bcd40) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80081bcd40) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80081bcd40) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806214e5d8,0,ffff80002b42a2f8,ffff80002b42a2d4,0,2,cd2fa48afbd489e3,ffff80002b42a550) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80002b42a518,ffff80002b42a550,ffff80002b42a380,ffff80002b42a388) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80002b42a518,ffff80002b42a550,ffff80002b42a490) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806c00f980,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80002b42a6a0,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80002b42a6a0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x733015d0afd0, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002b42a040 rbx 0xffffffff83804dcf cpu_info_full_primary+0x2dcf rdx 0 rcx 0xffff80003c4374a8 rax 0xffffffff83803ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xc570bf631754b521 r11 0xbdb7acb9fcef03a6 r12 0xffffffff83804bd0 cpu_info_full_primary+0x2bd0 r13 0 r14 0 r15 0x1 rip 0xffffffff816ee895 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002b42a030 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=63493 pid=56798 tcnt=4 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=0xffff80003c437c58,0xffff80003c4367e8 process=0xffff80003c422eb0 user=0xffff80002b425000, vmspace=0xfffffd806c00f980 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *56798 63493 46088 32767 7 0x10 syz-executor 56798 486546 46088 32767 3 0x4000090 fsleep syz-executor 56798 458712 46088 32767 3 0x4000010 biowait syz-executor 56798 518096 46088 32767 2 0x4000010 syz-executor 16642 300005 777 32767 3 0x3010 suspend syz-executor 16642 296219 777 32767 2 0x4081010 syz-executor 16642 21165 777 32767 2 0x4081010 syz-executor 16642 500191 777 32767 2 0x4081010 syz-executor 16642 212024 777 32767 2 0x4081010 syz-executor 6964 261737 56875 32767 2 0x10 syz-executor 6964 328493 56875 32767 3 0x4000090 fsleep syz-executor 25011 128300 38951 32767 3 0x3010 suspend syz-executor 25011 352081 38951 32767 2 0x4081010 syz-executor 38303 407617 9683 32767 3 0x90 nanoslp syz-executor 38303 383464 9683 32767 3 0x4000090 fifor syz-executor 38303 329804 9683 32767 3 0x4000090 fsleep syz-executor 80101 211973 60318 32767 2 0x10 syz-executor 80101 83239 60318 32767 3 0x4000090 fsleep syz-executor 80101 336958 60318 32767 3 0x4000090 fsleep syz-executor 4328 68987 94189 32767 2 0x10 syz-executor 4328 467632 94189 32767 3 0x4000090 ttyin syz-executor 4328 29647 94189 32767 3 0x4000090 ttyin syz-executor 4328 78210 94189 32767 3 0x4000090 kqread syz-executor 18711 492279 70349 0 7 0x2 syz-executor 8902 276091 0 0 3 0x14200 bored sosplice 94189 486816 28723 32767 3 0x90 nanoslp syz-executor 60318 140389 78227 32767 3 0x90 nanoslp syz-executor 38951 229675 40184 32767 3 0x90 nanoslp syz-executor 9683 199844 36345 32767 3 0x90 nanoslp syz-executor 777 420992 72624 32767 3 0x90 nanoslp syz-executor 46088 152323 89241 32767 3 0x90 nanoslp syz-executor 56875 99924 28553 32767 2 0x10 syz-executor 72624 246622 70349 0 3 0x82 wait syz-executor 40184 405856 70349 0 3 0x82 wait syz-executor 28553 364617 70349 0 3 0x82 wait syz-executor 89241 310705 70349 0 3 0x82 wait syz-executor 36345 108485 70349 0 3 0x82 wait syz-executor 78227 330051 70349 0 3 0x82 wait syz-executor 28723 83486 70349 0 3 0x82 wait syz-executor 70349 269429 703 0 3 0x82 kqread syz-executor 703 414187 22871 0 3 0x10008a sigsusp ksh 22871 348657 87492 0 3 0x98 kqread sshd-session 87492 204951 15969 0 3 0x92 kqread sshd-session 67104 7072 1 0 3 0x100083 ttyin getty 15969 77531 1 0 3 0x88 kqread sshd 99826 95964 99125 73 3 0x1100090 kqread syslogd 99125 199396 1 0 3 0x100082 sbwait syslogd 3208 95488 1 0 3 0x100080 kqread resolvd 91307 169478 93201 77 3 0x100092 kqread dhcpleased 10636 119796 93201 77 3 0x100092 kqread dhcpleased 93201 35137 1 0 3 0x80 kqread dhcpleased 60548 431482 0 0 3 0x14200 bored smr 23310 168090 0 0 2 0x14200 zerothread 1051 343908 0 0 3 0x14200 aiodoned aiodoned 26935 228614 0 0 3 0x14200 syncer update 58440 296075 0 0 3 0x14200 cleaner cleaner 44504 400897 0 0 3 0x14200 reaper reaper 38434 520034 0 0 3 0x14200 pgdaemon pagedaemon 28144 522318 0 0 3 0x14200 bored viomb 77439 409405 0 0 3 0x40014200 acpi0 acpi0 69234 179284 0 0 3 0x40014200 idle1 91959 431191 0 0 3 0x14200 bored softnet3 27462 243963 0 0 3 0x14200 bored softnet2 65806 308732 0 0 3 0x14200 bored softnet1 57405 300462 0 0 3 0x14200 bored softnet0 1751 342903 0 0 3 0x14200 bored systqmp 93902 206943 0 0 3 0x14200 bored systq 28704 3501 0 0 3 0x14200 tmoslp softclockmp 21164 519464 0 0 3 0x40014200 tmoslp softclock 83421 190214 0 0 3 0x40014200 idle0 1 359382 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 (0xffffffff839bd858) #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 56798 (syz-executor) thread 0xffff80003c4374a8 (63493) exclusive rwlock uobjlk r = 0 (0xfffffd8061b87ed0) #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 (0xffffffff839bd858) #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 56798 (syz-executor) thread 0xffff80003c437738 (458712) exclusive rrwlock inode r = 0 (0xfffffd8066f86880) #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10186 10952K 10965K 166960K 11266 0 pcb 17 12K 12K 166960K 17 0 rtable 214 6K 6K 166960K 368 0 pf 29 16K 16K 166960K 31 0 ifaddr 38 6K 7K 166960K 44 0 ifgroup 46 2K 2K 166960K 50 0 sysctl 2 1K 1K 166960K 2 0 counters 62 36K 36K 166960K 64 0 ioctlops 0 0K 2K 166960K 35 0 iov 0 0K 10K 166960K 13 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1335 84K 84K 166960K 1515 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 21 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 24 89K 125K 166960K 435 0 sigio 0 0K 0K 166960K 35 0 proc 64 103K 115K 166960K 510 0 subproc 69 4K 4K 166960K 222 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 29 0 in_multi 88 6K 7K 166960K 102 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 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 387 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 250 152K 161K 166960K 5124 0 UVM aobj 11 2K 2K 166960K 12 0 pinsyscall 45 90K 114K 166960K 1477 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 14 0 NDP 10 0K 2K 166960K 27 0 temp 74 8692K 8757K 166960K 5027 0 kqueue 14 22K 24K 166960K 61 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 60 0 57 1 0 1 1 0 8 0 rtentry 176 114 0 14 6 1 5 6 0 8 0 unpcb 144 195 0 178 2 0 2 2 0 8 1 syncache 336 5 0 5 1 1 0 1 0 8 0 tcpcb 808 164 0 157 8 0 8 8 0 8 7 arp 128 18 0 2 1 0 1 1 0 8 0 ipq 40 3 0 0 1 0 1 1 0 8 0 ipqe 40 4 0 1 1 0 1 1 0 8 0 inpcb 384 374 0 359 8 0 8 8 0 8 6 nd6 144 27 0 5 1 0 1 1 0 8 0 kcovpl 48 24 0 17 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 477 0 67 30 3 27 30 0 8 0 art_table 32 478 0 67 4 0 4 4 0 8 0 art_node 16 113 0 22 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 1 0 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 19 0 9 1 0 1 1 0 8 0 shmpl 112 9 0 1 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1904 0 373 96 0 96 96 0 8 0 ffsino 288 1904 0 373 110 0 110 110 0 8 0 nchpl 144 2420 0 720 63 0 63 63 0 8 0 uvmvnodes 80 2135 0 0 44 0 44 44 0 8 0 vnodes 216 2135 0 0 119 0 119 119 0 8 0 namei 1024 8034 0 8034 2 1 1 2 0 8 1 percpumem 16 47 0 1 1 0 1 1 0 8 0 kstatmem 264 22 0 2 2 0 2 2 0 8 0 scxspl 216 9018 0 9016 10 2 8 8 1 8 7 plimitpl 152 178 0 153 3 1 2 2 0 8 1 sigapl 424 686 0 631 8 1 7 8 0 8 0 futexpl 64 3534 0 3529 1 0 1 1 0 8 0 knotepl 120 456 0 0 14 0 14 14 0 8 0 kqueuepl 224 142 0 131 5 4 1 5 0 8 0 pipepl 336 363 0 336 8 3 5 8 0 8 2 fdescpl 520 667 0 631 4 0 4 4 0 8 1 filepl 160 3520 0 3291 16 4 12 16 0 8 2 lockfpl 104 75 0 71 1 0 1 1 0 8 0 lockfspl 48 29 0 25 1 0 1 1 0 8 0 sessionpl 144 39 0 24 1 0 1 1 0 8 0 pgrppl 48 67 0 44 1 0 1 1 0 8 0 ucredpl 104 432 0 414 1 0 1 1 0 8 0 zombiepl 144 632 0 631 1 0 1 1 0 8 0 processpl 1192 686 0 631 5 0 5 5 0 8 0 procpl 656 1078 0 1007 7 1 6 7 0 8 0 sosppl 168 1 0 1 1 0 1 1 0 8 1 sockpl 728 630 0 595 9 0 9 9 0 8 5 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 126 0 0 16 0 16 16 0 8 0 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 233 0 0 15 0 15 15 0 8 0 bufpl 280 3107 0 120 214 0 214 214 0 8 0 anonpl 32 9316 0 0 76 0 76 76 0 246 0 amapchunkpl 152 15783 0 15232 28 5 23 28 0 158 1 amappl16 200 2671 0 2647 19 8 11 14 0 8 8 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 110 0 100 1 0 1 1 0 8 0 amappl13 176 7 0 7 1 1 0 1 0 8 0 amappl12 168 1284 0 1248 2 0 2 2 0 8 0 amappl11 160 45 0 35 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 245 0 245 1 1 0 1 0 8 0 amappl8 136 31 0 30 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 112 111 0 105 1 0 1 1 0 8 0 amappl4 104 298 0 282 1 0 1 1 0 8 0 amappl3 96 2848 0 2719 4 0 4 4 0 8 0 amappl2 88 629 0 572 2 0 2 2 0 8 0 amappl1 80 9469 0 8898 14 0 14 14 0 8 0 amappl 88 4407 0 4223 6 1 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 11 0 1 1 0 1 1 0 8 0 uaddrrnd 24 667 0 631 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 667 0 631 1 0 1 1 0 8 0 vmmpekpl 168 8080 0 8038 3 0 3 3 0 8 0 vmmpepl 168 48327 0 46230 103 7 96 103 0 357 4 vmsppl 480 666 0 631 7 1 6 6 0 8 1 rwobjpl 72 17959 0 14962 56 0 56 56 0 8 1 pdppl 4096 1342 0 1262 126 46 80 98 0 8 0 pvpl 32 15948 0 0 129 0 129 129 0 265 0 pmappl 256 666 0 631 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 428 0 57 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(ffffffff833dc0d5) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff839bd848) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff839bd848) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd80081bcd40) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80081bcd40) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80081bcd40) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd806214e5d8,0,ffff80002b42a2f8,ffff80002b42a2d4,0,2,cd2fa48afbd489e3,ffff80002b42a550) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80002b42a518,ffff80002b42a550,ffff80002b42a380,ffff80002b42a388) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff80002b42a518,ffff80002b42a550,ffff80002b42a490) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806c00f980,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80002b42a6a0,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80002b42a6a0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x733015d0afd0, 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+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 witness_checkorder(ffffffff839bd890,9,0) at witness_checkorder+0x165 sys/kern/subr_witness.c:776 mtx_enter(ffffffff839bd880) at mtx_enter+0x47 sys/kern/kern_lock.c:238 uvm_pmr_getpages(400,0,0,1,0,400,ec8461666e29f4c2,ffffffffffffffff) at uvm_pmr_getpages+0x133c sys/uvm/uvm_pmemrange.c:1214 uvm_pglistalloc(400000,0,ffffffffffffffff,0,0,ffff80003c433448,d26456514e086a09,0) at uvm_pglistalloc+0x2a7 sys/uvm/uvm_page.c:786 km_alloc(400000,ffffffff83773590,ffffffff83773678,ffffffff837736f0) at km_alloc+0x4fa sys/uvm/uvm_km.c:681 kd_init(ffff8000014887c0,80000) at kd_init+0xa0 sys/dev/kcov.c:-1 kcovioctl(231300,80084b01,ffff80003c433770,3,ffff8000ffff1210) at kcovioctl+0x1c2 sys/dev/kcov.c:360 VOP_IOCTL(fffffd8064d44008,80084b01,ffff80003c433770,3,fffffd807f7d3820,ffff8000ffff1210) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806708ca68,80084b01,ffff80003c433770,ffff8000ffff1210) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff8000ffff1210,ffff80003c433950,ffff80003c4338a0) at sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 end trace frame: 0xffff80003c433940, count: 0 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+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 witness_checkorder(ffffffff839bd890,9,0) at witness_checkorder+0x165 sys/kern/subr_witness.c:776 mtx_enter(ffffffff839bd880) at mtx_enter+0x47 sys/kern/kern_lock.c:238 uvm_pmr_getpages(400,0,0,1,0,400,ec8461666e29f4c2,ffffffffffffffff) at uvm_pmr_getpages+0x133c sys/uvm/uvm_pmemrange.c:1214 uvm_pglistalloc(400000,0,ffffffffffffffff,0,0,ffff80003c433448,d26456514e086a09,0) at uvm_pglistalloc+0x2a7 sys/uvm/uvm_page.c:786 km_alloc(400000,ffffffff83773590,ffffffff83773678,ffffffff837736f0) at km_alloc+0x4fa sys/uvm/uvm_km.c:681 kd_init(ffff8000014887c0,80000) at kd_init+0xa0 sys/dev/kcov.c:-1 kcovioctl(231300,80084b01,ffff80003c433770,3,ffff8000ffff1210) at kcovioctl+0x1c2 sys/dev/kcov.c:360 VOP_IOCTL(fffffd8064d44008,80084b01,ffff80003c433770,3,fffffd807f7d3820,ffff8000ffff1210) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806708ca68,80084b01,ffff80003c433770,ffff8000ffff1210) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff8000ffff1210,ffff80003c433950,ffff80003c4338a0) at sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 syscall(ffff80003c433950) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c433950) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c38a0ff84c0, count: -16