panic: mtx 0xffffffff83a035a8: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 280926 58178 0 0 0 1 syz-executor * 89244 91665 0 0 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e4b86) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83a035a8) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff83a035a8) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd8008c74d38) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008c74d38) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008c74d38) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd805e7d87b0,0,ffff8000307ebff8,ffff8000307ebfd4,0,2,47ed1b11b56bd076,ffff8000307ec250) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff8000307ec218,ffff8000307ec250,ffff8000307ec080,ffff8000307ec088) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff8000307ec218,ffff8000307ec250,ffff8000307ec190) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806bbd0980,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff8000307ec3a0,200000000140) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff8000307ec3a0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7b125f741d30, 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 0xffffffff83a035a8: locking against myself ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e4b86) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83a035a8) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff83a035a8) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd8008c74d38) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008c74d38) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008c74d38) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd805e7d87b0,0,ffff8000307ebff8,ffff8000307ebfd4,0,2,47ed1b11b56bd076,ffff8000307ec250) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff8000307ec218,ffff8000307ec250,ffff8000307ec080,ffff8000307ec088) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff8000307ec218,ffff8000307ec250,ffff8000307ec190) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806bbd0980,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff8000307ec3a0,200000000140) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff8000307ec3a0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7b125f741d30, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000307ebd40 rbx 0xffffffff83893dcf cpu_info_full_primary+0x2dcf rdx 0 rcx 0xffff80003c4459d8 rax 0xffffffff83892ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xe4d6f5c68a4cc405 r11 0x78feeba891465543 r12 0xffffffff83893bd0 cpu_info_full_primary+0x2bd0 r13 0 r14 0 r15 0x1 rip 0xffffffff8274f485 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000307ebd30 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=89244 pid=91665 tcnt=4 stat=onproc flags process=0 proc=0 runpri=36, usrpri=50, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800039000d00,0xffff80003c445238 process=0xffff8000fffeb358 user=0xffff8000307e7000, vmspace=0xfffffd806bbd0980 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 58178 280926 68592 0 7 0 syz-executor *91665 89244 4090 0 7 0 syz-executor 91665 259925 4090 0 3 0x4000000 biowait syz-executor 91665 382589 4090 0 3 0x4000080 fsleep syz-executor 91665 25353 4090 0 3 0x4000080 fsleep syz-executor 93723 380823 12768 0 3 0x80 nanoslp syz-executor 93723 401187 12768 0 3 0x4000080 ttyout syz-executor 93723 218650 12768 0 3 0x4000080 fsleep syz-executor 93723 291964 12768 0 3 0x4000080 fsleep syz-executor 95860 269477 62058 -1 3 0x90 nanoslp syz-executor 95860 37307 62058 -1 3 0x4000090 sbwait syz-executor 95860 405534 62058 -1 3 0x4000090 fifow syz-executor 95860 15347 62058 -1 3 0x4000090 fsleep syz-executor 6442 208132 86702 0 3 0x1000080 nanoslp syz-executor 6442 166622 86702 0 3 0x5000080 fsleep syz-executor 6442 11202 86702 0 3 0x5000080 lockf syz-executor 6442 53928 86702 0 3 0x5000080 fsleep syz-executor 74594 339547 74901 0 3 0x80 nanoslp syz-executor 74594 80086 74901 0 3 0x4000080 ttyin syz-executor 74594 415694 74901 0 3 0x4000080 fsleep syz-executor 20796 482188 83679 0 3 0x80 nanoslp syz-executor 20796 271700 83679 0 3 0x4000080 kqsel syz-executor 20796 441663 83679 0 3 0x4000080 fsleep syz-executor 65223 179319 87470 0 3 0x80 nanoslp syz-executor 65223 277350 87470 0 3 0x4000080 kqread syz-executor 65223 123786 87470 0 3 0x4000080 fsleep syz-executor 83679 326478 96779 0 3 0x82 nanoslp syz-executor 37427 290078 0 0 3 0x14200 acct acct 12768 158519 96779 0 3 0x82 nanoslp syz-executor 61531 278473 0 0 3 0x14200 bored sosplice 4090 503613 96779 0 3 0x82 nanoslp syz-executor 86702 120001 96779 0 3 0x82 nanoslp syz-executor 87470 155043 96779 0 3 0x82 nanoslp syz-executor 68592 265276 96779 0 3 0x82 nanoslp syz-executor 74901 489751 96779 0 3 0x82 nanoslp syz-executor 62058 134249 96779 0 3 0x82 nanoslp syz-executor 96779 376355 77509 0 3 0x82 kqread syz-executor 77509 299277 48981 0 3 0x10008a sigsusp ksh 48981 202759 37250 0 3 0x98 kqread sshd-session 37250 312809 64073 0 3 0x92 kqread sshd-session 2300 151386 1 0 3 0x100083 ttyin getty 64073 308053 1 0 3 0x88 kqread sshd 82357 116651 70573 74 3 0x1100092 bpf pflogd 70573 517682 1 0 3 0x80 sbwait pflogd 96628 169610 83694 73 3 0x1100090 kqread syslogd 83694 469829 1 0 3 0x100082 sbwait syslogd 13706 7677 1 0 3 0x100080 kqread resolvd 38726 10912 28017 77 3 0x100092 kqread dhcpleased 61289 66136 28017 77 3 0x100092 kqread dhcpleased 28017 47155 1 0 3 0x80 kqread dhcpleased 3558 347883 0 0 3 0x14200 bored smr 74987 451810 0 0 3 0x14200 pgzero zerothread 75724 203352 0 0 3 0x14200 aiodoned aiodoned 11112 87917 0 0 3 0x14200 syncer update 52593 109507 0 0 3 0x14200 cleaner cleaner 64139 415436 0 0 3 0x14200 reaper reaper 73241 46319 0 0 3 0x14200 pgdaemon pagedaemon 67895 18871 0 0 3 0x14200 bored viomb 8831 17768 0 0 3 0x40014200 acpi0 acpi0 51566 511514 0 0 3 0x40014200 idle1 94581 399499 0 0 3 0x14200 bored softnet3 45502 247995 0 0 3 0x14200 bored softnet2 28742 205307 0 0 3 0x14200 bored softnet1 75660 40369 0 0 3 0x14200 bored softnet0 13506 440181 0 0 3 0x14200 bored systqmp 33141 298424 0 0 3 0x14200 bored systq 12649 165068 0 0 3 0x14200 tmoslp softclockmp 94728 121212 0 0 3 0x40014200 tmoslp softclock 48749 44391 0 0 3 0x40014200 idle0 1 42678 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 (0xffffffff83a035b8) #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 91665 (syz-executor) thread 0xffff80003c4459d8 (89244) Process 91665 (syz-executor) thread 0xffff80003c445228 (259925) Process 91665 (syz-executor) thread 0xffff80003c444f98 (382589) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10199 11095K 11353K 166960K 12104 0 pcb 18 14K 16K 166960K 259 0 rtable 192 7K 8K 166960K 481 0 pf 37 18K 22K 166960K 94 0 ifaddr 38 6K 8K 166960K 72 0 ifgroup 55 2K 2K 166960K 99 0 sysctl 2 1K 1K 166960K 2 0 counters 64 36K 37K 166960K 116 0 ioctlops 0 0K 4K 166960K 1606 0 iov 0 0K 16K 166960K 16 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1442 91K 91K 166960K 1988 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 17 0 dirhash 15 2K 2K 166960K 27 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 612 0 sigio 0 0K 0K 166960K 11 0 proc 72 91K 140K 166960K 627 0 subproc 72 4K 4K 166960K 91 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 55 0 in_multi 80 6K 7K 166960K 136 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 3 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 497 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 258 156K 162K 166960K 7107 0 UVM aobj 13 2K 2K 166960K 15 0 pinsyscall 43 86K 106K 166960K 1777 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 23 0 NDP 12 0K 2K 166960K 48 0 temp 79 8692K 8757K 166960K 27709 0 kqueue 15 24K 28K 166960K 92 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 71 0 67 1 0 1 1 0 8 0 rtentry 176 148 0 66 5 0 5 5 0 8 0 unpcb 144 417 0 397 6 0 6 6 0 8 5 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 808 119 0 115 4 0 4 4 0 8 3 arp 128 23 0 7 1 0 1 1 0 8 0 inpcb 384 628 0 617 10 2 8 8 0 8 6 nd6 144 33 0 15 1 0 1 1 0 8 0 pkpcb 40 37 0 37 2 1 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1192 20 0 20 1 0 1 1 0 8 1 pppxif 1504 3 0 3 1 1 0 1 0 8 0 pffrag 232 4 0 1 1 0 1 1 0 482 0 pffrnode 88 4 0 1 1 0 1 1 0 8 0 pffrent 40 6 0 3 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 pfrktable 1344 1 0 0 1 0 1 1 0 8 0 pfanchor 1288 1 0 1 1 1 0 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 51 0 4 1 0 1 1 0 8 0 pfstkey 128 53 0 6 2 0 2 2 0 8 0 pfstate 384 52 0 5 5 0 5 5 0 8 0 pfrule 1344 25 0 19 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 654 0 270 30 5 25 29 0 8 1 art_table 32 656 0 270 4 0 4 4 0 8 0 art_node 16 144 0 69 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 0 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 14 0 4 1 0 1 1 0 8 0 shmpl 112 12 0 2 1 0 1 1 0 8 0 dirhash 1024 27 0 8 3 0 3 3 0 8 0 dino2pl 256 2478 0 957 96 0 96 96 0 8 0 ffsino 288 2478 0 957 109 0 109 109 0 8 0 nchpl 144 3295 0 1599 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 1 0 1 0 8 0 uvmvnodes 80 2954 0 0 61 0 61 61 0 8 0 vnodes 216 2954 0 0 165 0 165 165 0 8 0 namei 1024 11724 0 11724 2 1 1 2 0 8 1 percpumem 16 73 0 26 1 0 1 1 0 8 0 kstatmem 264 54 0 30 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 10457 0 10455 9 8 1 8 1 8 0 plimitpl 152 117 0 100 1 0 1 1 0 8 0 sigapl 424 918 0 866 8 2 6 7 0 8 0 futexpl 64 6972 0 6962 1 0 1 1 0 8 0 knotepl 120 323 0 0 10 0 10 10 0 8 0 kqueuepl 224 175 0 160 2 0 2 2 0 8 0 pipepl 336 178 0 151 6 0 6 6 0 8 3 fdescpl 520 898 0 866 3 0 3 3 0 8 0 filepl 160 5542 0 5313 16 0 16 16 0 8 3 lockfpl 104 316 0 310 3 1 2 2 0 8 1 lockfspl 48 120 0 115 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 47 0 30 1 0 1 1 0 8 0 ucredpl 104 825 0 811 1 0 1 1 0 8 0 zombiepl 144 866 0 866 1 0 1 1 0 8 1 processpl 1192 918 0 866 5 0 5 5 0 8 0 procpl 656 1714 0 1644 8 1 7 7 0 8 0 srpgc 96 6 0 6 1 1 0 1 0 8 0 sosppl 168 5 0 5 2 1 1 1 0 8 1 sockpl 728 1156 0 1121 17 6 11 15 0 8 7 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 133 0 0 17 0 17 17 0 8 0 mcl2k 2048 28 0 0 4 0 4 4 0 8 0 mtagpl 96 71 0 0 2 0 2 2 0 8 0 mbufpl 256 1220 0 0 77 0 77 77 0 8 0 bufpl 280 3372 0 126 232 0 232 232 0 8 0 anonpl 32 7444 0 0 60 0 60 60 0 246 0 amapchunkpl 152 21970 0 21420 31 3 28 28 0 158 6 amappl16 200 1740 0 1709 15 4 11 11 0 8 7 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 118 0 106 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 1581 0 1550 4 2 2 3 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 3 0 3 1 1 0 1 0 8 0 amappl9 144 256 0 256 1 1 0 1 0 8 0 amappl8 136 30 0 27 1 0 1 1 0 8 0 amappl7 128 119 0 107 1 0 1 1 0 8 0 amappl6 120 195 0 191 1 0 1 1 0 8 0 amappl5 112 126 0 117 1 0 1 1 0 8 0 amappl4 104 325 0 306 1 0 1 1 0 8 0 amappl3 96 4427 0 4304 5 1 4 4 0 8 0 amappl2 88 676 0 612 2 0 2 2 0 8 0 amappl1 80 10460 0 9859 15 1 14 15 0 8 0 amappl 88 6283 0 6098 5 0 5 5 0 92 0 dma32768 32768 1 0 1 1 0 1 1 0 8 1 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 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 14 0 2 1 0 1 1 0 8 0 uaddrrnd 24 898 0 866 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 898 0 866 1 0 1 1 0 8 0 vmmpekpl 168 8831 0 8780 3 0 3 3 0 8 0 vmmpepl 168 61091 0 59030 97 3 94 97 0 357 3 vmsppl 480 897 0 866 5 0 5 5 0 8 0 rwobjpl 72 20446 0 16520 72 0 72 72 0 8 0 pdppl 4096 1803 0 1732 109 38 71 85 0 8 0 pvpl 32 13588 0 0 110 0 110 110 0 265 0 pmappl 256 897 0 866 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 471 0 48 13 0 13 13 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(ffffffff833e4b86) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83a035a8) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff83a035a8) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd8008c74d38) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008c74d38) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008c74d38) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd805e7d87b0,0,ffff8000307ebff8,ffff8000307ebfd4,0,2,47ed1b11b56bd076,ffff8000307ec250) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff8000307ec218,ffff8000307ec250,ffff8000307ec080,ffff8000307ec088) at uvm_fault_lower_io+0x319 sys/uvm/uvm_fault.c:1588 uvm_fault_lower(ffff8000307ec218,ffff8000307ec250,ffff8000307ec190) at uvm_fault_lower+0x278 sys/uvm/uvm_fault.c:1362 uvm_fault(fffffd806bbd0980,200000000000,0,2) at uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff8000307ec3a0,200000000140) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff8000307ec3a0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7b125f741d30, 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 __mp_lock(ffffffff83a009a0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83a009a0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 sys_mmap(ffff80003c4442c8,ffff80002bffe4e0,ffff80002bffe430) at sys_mmap+0x62f sys/uvm/uvm_mmap.c:292 syscall(ffff80002bffe4e0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002bffe4e0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7644dd44fd40, count: 7 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 __mp_lock(ffffffff83a009a0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83a009a0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 sys_mmap(ffff80003c4442c8,ffff80002bffe4e0,ffff80002bffe430) at sys_mmap+0x62f sys/uvm/uvm_mmap.c:292 syscall(ffff80002bffe4e0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002bffe4e0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7644dd44fd40, count: -8