panic: mtx 0xffffffff838e7520: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *242151 79135 32767 0x10 0 0 syz-executor 447722 79135 32767 0x10 0x4000000 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e5832) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff838e7520) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff838e7520) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd8008037030) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008037030) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008037030) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8063bde830,0,ffff80003c446f48,ffff80003c446f2c,0,2,7da8f034f146a845,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c447160,ffff80003c447198,ffff80003c446fe0,ffff80003c446fc8) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1651 uvm_fault_lower(ffff80003c447160,ffff80003c447198,ffff80003c4470e0) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1418 uvm_fault(fffffd806c09b5c8,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c4472f0,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c4472f0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x79062d2acc10, 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 0xffffffff838e7520: locking against myself ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e5832) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff838e7520) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff838e7520) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd8008037030) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008037030) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008037030) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8063bde830,0,ffff80003c446f48,ffff80003c446f2c,0,2,7da8f034f146a845,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c447160,ffff80003c447198,ffff80003c446fe0,ffff80003c446fc8) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1651 uvm_fault_lower(ffff80003c447160,ffff80003c447198,ffff80003c4470e0) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1418 uvm_fault(fffffd806c09b5c8,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c4472f0,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c4472f0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x79062d2acc10, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c446c90 rbx 0xffffffff8388cdcf cpu_info_full_primary+0x2dcf rdx 0 rcx 0xffff80003a80a7e0 rax 0xffffffff8388bff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x757e19fe209add99 r11 0xfb16953bb85165ab r12 0xffffffff8388cbd0 cpu_info_full_primary+0x2bd0 r13 0 r14 0 r15 0x1 rip 0xffffffff8159afd5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c446c80 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=242151 pid=79135 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=0xffff80003a80aa70,0xffff80003a80b4c0 process=0xffff80003c4212c0 user=0xffff80003c442000, vmspace=0xfffffd806c09b5c8 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=1 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *79135 242151 15680 32767 7 0x10 syz-executor 79135 429411 15680 32767 3 0x4000010 uobjlk syz-executor 79135 428675 15680 32767 3 0x4000010 biowait syz-executor 79135 447722 15680 32767 7 0x4000010 syz-executor 864 362402 75525 32767 3 0x90 nanoslp syz-executor 864 234138 75525 32767 3 0x4000090 fsleep syz-executor 864 320172 75525 32767 3 0x4000090 pipewr syz-executor 70283 64689 8327 32767 3 0x90 nanoslp syz-executor 70283 352969 8327 32767 3 0x4000090 lockf syz-executor 70283 85504 8327 32767 3 0x4000090 fsleep syz-executor 88543 171395 38688 32767 3 0x90 nanoslp syz-executor 88543 76239 38688 32767 3 0x4000090 lockf syz-executor 88543 153161 38688 32767 3 0x4000090 nanoslp syz-executor 88543 454795 38688 32767 3 0x4000090 fsleep syz-executor 41441 27977 30332 32767 3 0x90 nanoslp syz-executor 41441 79238 30332 32767 3 0x4000090 sbwait syz-executor 41441 67891 30332 32767 3 0x4000090 fsleep syz-executor 79687 517176 86143 32767 3 0x90 nanoslp syz-executor 79687 49951 86143 32767 3 0x4000090 fsleep syz-executor 79687 504793 86143 32767 3 0x4000090 netacc syz-executor 79687 221198 86143 32767 3 0x4000090 fsleep syz-executor 66257 216838 64582 32767 3 0x90 nanoslp syz-executor 66257 230552 64582 32767 3 0x4000090 fsleep syz-executor 66257 358065 64582 32767 3 0x4000090 kqread syz-executor 37639 410745 95325 32767 3 0x90 nanoslp syz-executor 37639 39077 95325 32767 3 0x4000090 fsleep syz-executor 37639 372950 95325 32767 3 0x4000090 ttyin syz-executor 37639 74902 95325 32767 3 0x4000090 fsleep syz-executor 94446 503160 0 0 3 0x14200 bored sosplice 15680 112164 44378 32767 3 0x90 nanoslp syz-executor 38688 204036 86021 32767 3 0x90 nanoslp syz-executor 95325 5416 67980 32767 3 0x90 nanoslp syz-executor 8327 271187 79456 32767 3 0x90 nanoslp syz-executor 86143 271120 65825 32767 3 0x90 nanoslp syz-executor 75525 99518 5226 32767 3 0x90 nanoslp syz-executor 30332 460094 53889 32767 3 0x90 nanoslp syz-executor 64582 96706 48935 32767 3 0x90 nanoslp syz-executor 86021 212414 67453 0 3 0x82 wait syz-executor 53889 503457 67453 0 3 0x82 wait syz-executor 65825 27703 67453 0 3 0x82 wait syz-executor 48935 304428 67453 0 3 0x82 wait syz-executor 5226 148983 67453 0 3 0x82 wait syz-executor 79456 313405 67453 0 3 0x82 wait syz-executor 67980 195864 67453 0 3 0x82 wait syz-executor 44378 130889 67453 0 3 0x82 wait syz-executor 67453 134475 13575 0 3 0x82 kqread syz-executor 13575 434253 24950 0 3 0x10008a sigsusp ksh 24950 509915 23038 0 3 0x98 kqread sshd-session 23038 373386 57993 0 3 0x92 kqread sshd-session 721 456810 1 0 3 0x100083 ttyin getty 57993 118214 1 0 3 0x88 kqread sshd 47744 249707 91556 73 3 0x1100090 kqread syslogd 91556 219163 1 0 3 0x100082 sbwait syslogd 40019 521672 1 0 3 0x100080 kqread resolvd 84434 182475 6512 77 3 0x100092 kqread dhcpleased 64845 301951 6512 77 3 0x100092 kqread dhcpleased 6512 103734 1 0 3 0x80 kqread dhcpleased 52204 77890 0 0 3 0x14200 bored smr 30292 495798 0 0 3 0x14200 pgzero zerothread 63941 395866 0 0 3 0x14200 aiodoned aiodoned 10983 134089 0 0 3 0x14200 syncer update 59276 91574 0 0 3 0x14200 cleaner cleaner 75180 411789 0 0 3 0x14200 reaper reaper 87570 42077 0 0 3 0x14200 pgdaemon pagedaemon 25638 88946 0 0 3 0x14200 bored viomb 56064 131098 0 0 3 0x40014200 acpi0 acpi0 23918 461878 0 0 3 0x40014200 idle1 76420 44110 0 0 3 0x14200 bored softnet3 34171 302917 0 0 3 0x14200 bored softnet2 82473 78664 0 0 3 0x14200 bored softnet1 76887 438090 0 0 3 0x14200 bored softnet0 24582 25328 0 0 3 0x14200 bored systqmp 56586 271975 0 0 3 0x14200 bored systq 9358 365316 0 0 3 0x14200 tmoslp softclockmp 65136 257674 0 0 3 0x40014200 tmoslp softclock 57323 426577 0 0 3 0x40014200 idle0 1 55328 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 (0xffffffff838e7530) #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+0x2d1 sys/uvm/uvm_fault.c:1651 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1418 #6 uvm_fault+0x278 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 79135 (syz-executor) thread 0xffff80003a80a7e0 (242151) exclusive rwlock uobjlk r = 0 (0xfffffd806c023780) #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+0x2d1 sys/uvm/uvm_fault.c:1651 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1418 #6 uvm_fault+0x278 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 (0xffffffff838e7530) #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+0x2d1 sys/uvm/uvm_fault.c:1651 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1418 #6 uvm_fault+0x278 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 79135 (syz-executor) thread 0xffff80003a80b4b0 (429411) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a0a348) #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 Process 79135 (syz-executor) thread 0xffff80003a80b9d0 (428675) exclusive rrwlock inode r = 0 (0xfffffd807dcabe30) #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:2912 #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 10187 10954K 10965K 166960K 11264 0 pcb 17 12K 12K 166960K 17 0 rtable 234 6K 7K 166960K 350 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 30 0 iov 0 0K 20K 166960K 13 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1334 84K 84K 166960K 1401 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 80 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 26 97K 121K 166960K 284 0 sigio 0 0K 0K 166960K 10 0 proc 59 91K 115K 166960K 489 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 33 0 in_multi 99 7K 7K 166960K 104 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 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 345 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 279 169K 177K 166960K 4103 0 UVM aobj 13 5K 6K 166960K 14 0 pinsyscall 47 94K 108K 166960K 1289 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 14 0 NDP 11 0K 2K 166960K 27 0 temp 38 8682K 8746K 166960K 4240 0 kqueue 17 28K 32K 166960K 53 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 79 0 75 2 0 2 2 0 8 1 rtentry 176 111 0 1 5 0 5 5 0 8 0 unpcb 144 153 0 136 2 0 2 2 0 8 0 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 808 98 0 94 4 0 4 4 0 8 3 arp 128 18 0 0 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 2 0 0 1 0 1 1 0 8 0 inpcb 384 271 0 258 5 0 5 5 0 8 3 nd6 144 24 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 256 452 0 0 29 0 29 29 0 8 0 art_table 32 453 0 0 4 0 4 4 0 8 0 art_node 16 110 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 0 1 0 1 1 0 8 0 semapl 112 76 0 66 1 0 1 1 0 8 0 shmpl 112 11 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1792 0 285 95 0 95 95 0 8 0 ffsino 288 1792 0 285 108 0 108 108 0 8 0 nchpl 144 2179 0 500 63 0 63 63 0 8 0 uvmvnodes 80 1873 0 0 39 0 39 39 0 8 0 vnodes 216 1873 0 0 105 0 105 105 0 8 0 namei 1024 6625 0 6625 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 6785 0 6783 3 1 2 2 1 8 1 plimitpl 152 127 0 100 2 0 2 2 0 8 0 sigapl 424 558 0 501 7 0 7 7 0 8 0 futexpl 64 2144 0 2135 1 0 1 1 0 8 0 knotepl 120 308 0 0 10 0 10 10 0 8 0 kqueuepl 224 77 0 64 2 0 2 2 0 8 1 pipepl 336 146 0 118 6 0 6 6 0 8 3 fdescpl 520 539 0 501 3 0 3 3 0 8 0 filepl 160 2541 0 2314 16 0 16 16 0 8 6 lockfpl 104 40 0 34 1 0 1 1 0 8 0 lockfspl 48 16 0 12 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 36 0 12 1 0 1 1 0 8 0 ucredpl 104 360 0 341 1 0 1 1 0 8 0 zombiepl 144 501 0 501 1 0 1 1 0 8 1 processpl 1192 558 0 501 5 0 5 5 0 8 0 procpl 656 814 0 737 7 0 7 7 0 8 0 sosppl 168 4 0 4 1 0 1 1 0 8 1 sockpl 728 506 0 472 11 0 11 11 0 8 7 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 121 0 0 16 0 16 16 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 230 0 0 15 0 15 15 0 8 0 bufpl 280 2467 0 116 168 0 168 168 0 8 0 anonpl 32 3673 0 0 30 0 30 30 0 246 0 amapchunkpl 152 12022 0 11390 26 0 26 26 0 158 1 amappl16 200 1823 0 1794 5 2 3 5 0 8 1 amappl15 192 11 0 10 1 0 1 1 0 8 0 amappl14 184 105 0 95 1 0 1 1 0 8 0 amappl13 176 33 0 33 2 2 0 1 0 8 0 amappl12 168 1136 0 1098 2 0 2 2 0 8 0 amappl11 160 46 0 36 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 253 0 253 1 1 0 1 0 8 0 amappl8 136 26 0 25 1 0 1 1 0 8 0 amappl7 128 93 0 82 1 0 1 1 0 8 0 amappl6 120 167 0 164 1 0 1 1 0 8 0 amappl5 112 117 0 110 1 0 1 1 0 8 0 amappl4 104 292 0 275 1 0 1 1 0 8 0 amappl3 96 2164 0 2021 4 0 4 4 0 8 0 amappl2 88 607 0 554 2 0 2 2 0 8 0 amappl1 80 8717 0 8133 14 0 14 14 0 8 0 amappl 88 3438 0 3225 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 13 0 1 1 0 1 1 0 8 0 uaddrrnd 24 539 0 501 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 539 0 501 1 0 1 1 0 8 0 vmmpekpl 168 6136 0 6100 2 0 2 2 0 8 0 vmmpepl 168 40449 0 38253 100 0 100 100 0 357 4 vmsppl 480 538 0 501 7 1 6 6 0 8 0 rwobjpl 72 15415 0 12647 52 1 51 51 0 8 0 pdppl 4096 1086 0 1002 106 22 84 96 0 8 0 pvpl 32 12036 0 0 99 1 98 98 0 265 0 pmappl 256 538 0 501 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 397 0 25 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(ffffffff833e5832) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff838e7520) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff838e7520) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd8008037030) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008037030) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008037030) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8063bde830,0,ffff80003c446f48,ffff80003c446f2c,0,2,7da8f034f146a845,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c447160,ffff80003c447198,ffff80003c446fe0,ffff80003c446fc8) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1651 uvm_fault_lower(ffff80003c447160,ffff80003c447198,ffff80003c4470e0) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1418 uvm_fault(fffffd806c09b5c8,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c4472f0,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c4472f0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x79062d2acc10, 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_const_cmp4(ffffffff83a0a348,9) at __sanitizer_cov_trace_const_cmp4+0xf sys/dev/kcov.c:229 __mp_lock(ffffffff83a0a140) at __mp_lock+0xe1 read_rflags machine/cpufunc.h:193 [inline] __mp_lock(ffffffff83a0a140) at __mp_lock+0xe1 intr_disable machine/cpufunc.h:214 [inline] __mp_lock(ffffffff83a0a140) at __mp_lock+0xe1 sys/kern/kern_lock.c:139 __mp_acquire_count(ffffffff83a0a140,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 msleep(fffffd806c09b5f8,fffffd806c09b728,4,ffffffff8355acf0,0) at msleep+0x204 sys/kern/kern_synch.c:-1 vm_map_lock_ln(fffffd806c09b5c8,0,0) at vm_map_lock_ln+0xc4 sys/uvm/uvm_map.c:5243 uvm_map_pageable(fffffd806c09b5c8,200000000000,200000800000,0,0) at uvm_map_pageable+0x187 sys/uvm/uvm_map.c:2214 sys_mlock(ffff80003a80af90,ffff80003c4d3da0,ffff80003c4d3cf0) at sys_mlock+0x23d sys/uvm/uvm_mmap.c:849 syscall(ffff80003c4d3da0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4d3da0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4a65ab3cf90, count: 3 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_const_cmp4(ffffffff83a0a348,9) at __sanitizer_cov_trace_const_cmp4+0xf sys/dev/kcov.c:229 __mp_lock(ffffffff83a0a140) at __mp_lock+0xe1 read_rflags machine/cpufunc.h:193 [inline] __mp_lock(ffffffff83a0a140) at __mp_lock+0xe1 intr_disable machine/cpufunc.h:214 [inline] __mp_lock(ffffffff83a0a140) at __mp_lock+0xe1 sys/kern/kern_lock.c:139 __mp_acquire_count(ffffffff83a0a140,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 msleep(fffffd806c09b5f8,fffffd806c09b728,4,ffffffff8355acf0,0) at msleep+0x204 sys/kern/kern_synch.c:-1 vm_map_lock_ln(fffffd806c09b5c8,0,0) at vm_map_lock_ln+0xc4 sys/uvm/uvm_map.c:5243 uvm_map_pageable(fffffd806c09b5c8,200000000000,200000800000,0,0) at uvm_map_pageable+0x187 sys/uvm/uvm_map.c:2214 sys_mlock(ffff80003a80af90,ffff80003c4d3da0,ffff80003c4d3cf0) at sys_mlock+0x23d sys/uvm/uvm_mmap.c:849 syscall(ffff80003c4d3da0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4d3da0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4a65ab3cf90, count: -12