uvm_fault(0xfffffd806efd2a58, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at pool_do_get+0x2dc: movq 0(%rax),%rax TID PID UID PRFLAGS PFLAGS CPU COMMAND * 25884 91795 0 0x8000002 0 1 syz-executor.2 109507 39106 0 0x1a000002 0x4000000 0 syz-fuzzer pool_do_get(ffffffff82e4fbd8,1,ffff80002f0f1118) at pool_do_get+0x2dc pool_update_curpage sys/kern/subr_pool.c:1059 [inline] pool_do_get(ffffffff82e4fbd8,1,ffff80002f0f1118) at pool_do_get+0x2dc sys/kern/subr_pool.c:765 pool_get(ffffffff82e4fbd8,1) at pool_get+0xf0 sys/kern/subr_pool.c:582 pmap_create() at pmap_create+0x144 sys/arch/amd64/amd64/pmap.c:1369 uvmspace_fork(ffff8000ffffb0e0) at uvmspace_fork+0x64 uvmspace_init sys/uvm/uvm_map.c:3302 [inline] uvmspace_fork(ffff8000ffffb0e0) at uvmspace_fork+0x64 uvmspace_alloc sys/uvm/uvm_map.c:3280 [inline] uvmspace_fork(ffff8000ffffb0e0) at uvmspace_fork+0x64 sys/uvm/uvm_map.c:3852 process_new(ffff8000ffff6540,ffff8000ffffb0e0,1) at process_new+0x3dc sys/kern/kern_fork.c:278 fork1(ffff80002d6af228,1,ffffffff821ef240,0,ffff80002f0f13a0,0) at fork1+0x2ef sys/kern/kern_fork.c:399 syscall(ffff80002f0f1450) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80002f0f1450) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7212c53b6840, count: 7 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: uvm_fault(0xfffffd806efd2a58, 0x0, 0, 1) -> e ddb{1}> trace pool_do_get(ffffffff82e4fbd8,1,ffff80002f0f1118) at pool_do_get+0x2dc pool_update_curpage sys/kern/subr_pool.c:1059 [inline] pool_do_get(ffffffff82e4fbd8,1,ffff80002f0f1118) at pool_do_get+0x2dc sys/kern/subr_pool.c:765 pool_get(ffffffff82e4fbd8,1) at pool_get+0xf0 sys/kern/subr_pool.c:582 pmap_create() at pmap_create+0x144 sys/arch/amd64/amd64/pmap.c:1369 uvmspace_fork(ffff8000ffffb0e0) at uvmspace_fork+0x64 uvmspace_init sys/uvm/uvm_map.c:3302 [inline] uvmspace_fork(ffff8000ffffb0e0) at uvmspace_fork+0x64 uvmspace_alloc sys/uvm/uvm_map.c:3280 [inline] uvmspace_fork(ffff8000ffffb0e0) at uvmspace_fork+0x64 sys/uvm/uvm_map.c:3852 process_new(ffff8000ffff6540,ffff8000ffffb0e0,1) at process_new+0x3dc sys/kern/kern_fork.c:278 fork1(ffff80002d6af228,1,ffffffff821ef240,0,ffff80002f0f13a0,0) at fork1+0x2ef sys/kern/kern_fork.c:399 syscall(ffff80002f0f1450) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80002f0f1450) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7212c53b6840, count: -8 ddb{1}> show registers rdi 0x1 rsi 0xffffffff82e4fc40 pmap_pdp_pool+0x68 rbp 0xffff80002f0f10a0 rbx 0xfffffd806d188900 rdx 0 rcx 0xffff80002d6af228 rax 0 r8 0x7f8 r9 0 r10 0xb1172d297851f0ce r11 0x8f9271219c908e3d r12 0x1 r13 0x1 r14 0xffffffff82e4fbd8 pmap_pdp_pool r15 0x8 rip 0xffffffff810672dc pool_do_get+0x2dc cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002f0f1020 ss 0x10 pool_do_get+0x2dc: movq 0(%rax),%rax ddb{1}> show proc PROC (syz-executor.2) tid=25884 pid=91795 tcnt=1 stat=onproc flags process=8000002 proc=0 runpri=17, usrpri=76, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002f0c3220,0xffff80002f0c2fa0 process=0xffff8000ffffb0e0 user=0xffff80002f0ec000, vmspace=0xfffffd806efd2a58 estcpu=36, cpticks=17, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 46412 185024 32690 0 2 0x8000000 syz-executor.1 42011 147207 39997 0 2 0x8000000 syz-executor.0 42011 370747 39997 0 3 0xc000080 fsleep syz-executor.0 23565 22275 97482 0 2 0x8000000 syz-executor.5 23565 144590 97482 0 3 0xc000080 lockf syz-executor.5 68931 5367 36256 0 3 0x8000080 nanoslp syz-executor.3 68931 59141 36256 0 3 0xc000080 netcon2 syz-executor.3 68931 476336 36256 0 3 0xc000080 fsleep syz-executor.3 10981 412570 66577 0 3 0x8000080 nanoslp syz-executor.6 10981 120807 66577 0 3 0xc000080 sbwait syz-executor.6 10981 137146 66577 0 3 0xc000080 fsleep syz-executor.6 *91795 25884 39106 0 7 0x8000002 syz-executor.2 36256 146941 39106 0 3 0x8000082 nanoslp syz-executor.3 46071 411734 39106 0 2 0x8000002 syz-executor.4 77328 180548 1 0 3 0x18100083 ttyin getty 66577 426507 39106 0 2 0x8000482 syz-executor.6 32690 126665 39106 0 2 0x8000002 syz-executor.1 39997 290099 39106 0 2 0x8000482 syz-executor.0 95686 231302 39106 0 2 0x8000482 syz-executor.7 97482 355679 39106 0 2 0x8000482 syz-executor.5 48210 95987 0 0 3 0x14200 acct acct 7683 493745 0 0 3 0x14280 nfsidl nfsio 9560 454652 0 0 3 0x14280 nfsidl nfsio 74032 517257 0 0 3 0x14280 nfsidl nfsio 59184 58440 0 0 3 0x14280 nfsidl nfsio 97446 204541 0 0 3 0x14280 nfsidl nfsio 76813 190235 0 0 3 0x14280 nfsidl nfsio 96485 61997 0 0 3 0x14280 nfsidl nfsio 51546 119832 0 0 3 0x14280 nfsidl nfsio 40241 453489 0 0 3 0x14280 nfsidl nfsio 8983 162971 0 0 3 0x14280 nfsidl nfsio 45486 266845 0 0 3 0x14280 nfsidl nfsio 82726 372181 0 0 3 0x14280 nfsidl nfsio 7633 315016 0 0 3 0x14280 nfsidl nfsio 41608 210577 0 0 3 0x14280 nfsidl nfsio 23527 446738 0 0 3 0x14280 nfsidl nfsio 1745 330479 0 0 3 0x14280 nfsidl nfsio 90909 135693 0 0 3 0x14280 nfsidl nfsio 58996 391349 0 0 3 0x14280 nfsidl nfsio 52651 358953 0 0 3 0x14280 nfsidl nfsio 28490 288160 0 0 3 0x14280 nfsidl nfsio 71343 518736 0 0 3 0x14200 bored sosplice 39106 458427 33006 0 3 0x1a000082 thrsleep syz-fuzzer 39106 344772 33006 0 3 0x1e000082 nanoslp syz-fuzzer 39106 239872 33006 0 3 0x1e000082 wait syz-fuzzer 39106 399 33006 0 3 0x1e000082 wait syz-fuzzer 39106 485072 33006 0 3 0x1e000082 thrsleep syz-fuzzer 39106 316246 33006 0 3 0x1e000082 wait syz-fuzzer 39106 259060 33006 0 2 0x1e000002 syz-fuzzer 39106 126030 33006 0 3 0x1e000082 thrsleep syz-fuzzer 39106 68526 33006 0 3 0x1e000082 wait syz-fuzzer 39106 314526 33006 0 3 0x1e000082 wait syz-fuzzer 39106 298026 33006 0 3 0x1e000082 thrsleep syz-fuzzer 39106 513442 33006 0 3 0x1e000082 thrsleep syz-fuzzer 39106 203384 33006 0 3 0x1e000082 wait syz-fuzzer 39106 158185 33006 0 3 0x1e000082 wait syz-fuzzer 39106 483671 33006 0 3 0x1e000082 wait syz-fuzzer 39106 109507 33006 0 7 0x1e000002 syz-fuzzer 33006 174674 70527 0 3 0x810008a sigsusp ksh 70527 454210 7022 0 3 0x1800009a kqread sshd 7022 482014 1 0 3 0x18000088 kqread sshd 28564 506287 35951 74 3 0x19100092 bpf pflogd 35951 274177 1 0 3 0x18000080 sbwait pflogd 11289 312523 77953 73 3 0x19100090 kqread syslogd 77953 69456 1 0 3 0x18100082 sbwait syslogd 40656 176564 1 0 3 0x18100080 kqread resolvd 91359 297197 34489 77 3 0x18100092 kqread dhcpleased 43169 369946 34489 77 3 0x18100092 kqread dhcpleased 34489 84078 1 0 3 0x18000080 kqread dhcpleased 45269 427727 0 0 3 0x14200 bored smr 76514 138760 0 0 2 0x14200 zerothread 33440 519396 0 0 3 0x14200 aiodoned aiodoned 5874 427197 0 0 3 0x14200 syncer update 2619 389769 0 0 3 0x14200 cleaner cleaner 9635 154464 0 0 3 0x14200 reaper reaper 50000 316833 0 0 3 0x14200 pgdaemon pagedaemon 17544 323171 0 0 3 0x14200 bored viomb 75804 68208 0 0 3 0x40014200 acpi0 acpi0 78999 42723 0 0 3 0x40014200 idle1 37038 447924 0 0 3 0x14200 bored softnet3 71136 69021 0 0 3 0x14200 bored softnet2 45375 465833 0 0 3 0x14200 bored softnet1 97130 67138 0 0 2 0x14200 softnet0 58592 483088 0 0 3 0x14200 bored systqmp 80457 96004 0 0 3 0x14200 bored systq 96781 493171 0 0 3 0x14200 tmoslp softclockmp 70489 275716 0 0 3 0x40014200 tmoslp softclock 93622 188037 0 0 3 0x40014200 idle0 1 370921 0 0 3 0x8080082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex pdppl r = 0 (0xffffffff82e4fbe8) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1187 #1 mtx_enter_try+0x103 #2 mtx_enter+0x4e sys/kern/kern_lock.c:266 #3 pool_get+0xc4 sys/kern/subr_pool.c:579 #4 pmap_create+0x144 sys/arch/amd64/amd64/pmap.c:1369 #5 uvmspace_fork+0x64 uvmspace_init sys/uvm/uvm_map.c:3302 [inline] #5 uvmspace_fork+0x64 uvmspace_alloc sys/uvm/uvm_map.c:3280 [inline] #5 uvmspace_fork+0x64 sys/uvm/uvm_map.c:3852 #6 process_new+0x3dc sys/kern/kern_fork.c:278 #7 fork1+0x2ef sys/kern/kern_fork.c:399 #8 syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] #8 syscall+0x854 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 91795 (syz-executor.2) thread 0xffff80002d6af228 (25884) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10206 6638K 6948K 166960K 12744 0 pcb 17 12K 12K 166960K 257 0 rtable 207 15K 16K 166960K 1278 0 pf 34 9K 10K 166960K 141 0 ifaddr 40 14K 16K 166960K 171 0 ifgroup 59 2K 3K 166960K 225 0 sysctl 3 0K 1K 166960K 8 0 counters 66 36K 37K 166960K 154 0 ioctlops 0 0K 4K 166960K 1602 0 iov 0 0K 33K 166960K 153 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1380 87K 87K 166960K 2622 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 34 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 172 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 16 57K 85K 166960K 2327 0 sigio 0 0K 0K 166960K 52 0 proc 70 91K 127K 166960K 1430 0 subproc 104 6K 7K 166960K 418 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 393 0 in_multi 77 5K 7K 166960K 460 0 ether_multi 1 0K 0K 166960K 14 0 mrt 1 0K 0K 166960K 7 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 931 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 322 111K 132K 166960K 22203 0 UVM aobj 84 3K 3K 166960K 97 0 pinsyscall 40 80K 108K 166960K 4193 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 169 0 NDP 13 0K 2K 166960K 121 0 temp 74 6816K 7312K 166960K 62954 0 kqueue 12 18K 26K 166960K 277 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 120 265 0 261 1 0 1 1 0 8 0 rtentry 112 422 0 332 4 0 4 4 0 8 0 unpcb 144 1787 0 1766 8 7 1 5 0 8 0 syncache 336 12 0 12 6 6 0 1 0 8 0 tcpqe 32 15 42 15 1 1 0 1 0 8 0 tcpcb 808 693 0 679 8 6 2 8 0 8 0 arp 120 89 0 72 1 0 1 1 0 8 0 inpcb 392 2335 0 2315 12 9 3 8 0 8 0 nd6 136 103 0 85 1 0 1 1 0 8 0 pkpcb 40 20 0 20 7 6 1 1 0 8 1 kcovpl 48 32 0 24 1 0 1 1 0 8 0 ppxss 1168 11 0 11 9 8 1 1 0 8 1 pool(0xffffffff82da0c78:ppxss): page inconsistency: page 0x0; 0 on list, 0 missing, 14 items per page pffrag 232 14 0 9 1 0 1 1 0 482 0 pffrnode 88 14 0 9 1 0 1 1 0 8 0 pffrent 40 235 0 230 2 1 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 24 212 0 158 1 0 1 1 0 8 0 pfstkey 128 212 0 158 3 0 3 3 0 8 0 pfstate 376 212 0 158 8 0 8 8 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1626 0 1254 41 16 25 33 0 8 1 art_table 32 1627 0 1254 5 1 4 5 0 8 0 art_node 16 417 0 335 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 10 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 164 0 154 1 0 1 1 0 8 0 shmpl 112 94 0 13 3 0 3 3 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 4977 0 3456 96 0 96 96 0 8 0 ffsino 272 4977 0 3456 102 0 102 102 0 8 0 nchpl 144 8409 0 6662 67 1 66 67 0 8 0 uvmvnodes 80 5847 0 0 120 0 120 120 0 8 0 vnodes 216 5847 0 0 325 0 325 325 0 8 0 namei 1024 28751 0 28751 4 3 1 2 0 8 1 percpumem 16 91 0 44 1 0 1 1 0 8 0 vcpupl 3904 10 0 2 1 0 1 1 0 8 0 vmpool 696 12 0 4 1 0 1 1 0 8 0 kstatmem 264 114 0 88 3 0 3 3 0 8 0 scsiplug 72 9 0 9 5 5 0 1 0 8 0 scxspl 216 33722 0 33722 16 15 1 8 1 8 1 plimitpl 152 289 0 273 1 0 1 1 0 8 0 sigapl 424 2630 0 2560 10 1 9 9 0 8 0 futexpl 64 30584 0 30581 3 2 1 1 0 8 0 knotepl 120 420 0 0 11 0 11 11 0 8 0 kqueuepl 216 598 0 590 5 4 1 5 0 8 0 pipepl 320 468 0 440 4 1 3 4 0 8 0 fdescpl 496 2590 0 2561 5 0 5 5 0 8 0 filepl 152 14906 0 14651 21 10 11 20 0 8 0 lockfpl 104 530 0 526 1 0 1 1 0 8 0 lockfspl 48 230 0 227 1 0 1 1 0 8 0 sessionpl 144 50 0 33 1 0 1 1 0 8 0 pgrppl 48 94 0 77 1 0 1 1 0 8 0 ucredpl 104 2433 0 2419 1 0 1 1 0 8 0 zombiepl 144 2561 0 2560 1 0 1 1 0 8 0 processpl 1136 2630 0 2560 6 0 6 6 0 8 0 procpl 656 5031 0 4940 10 1 9 9 0 8 0 srpgc 96 20 0 20 5 4 1 1 0 8 1 sosppl 168 46 0 46 8 7 1 1 0 8 1 sockpl 664 4450 0 4407 23 18 5 17 0 8 1 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 8 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 12 0 0 2 0 2 2 0 8 0 mcl4k 4096 23 0 0 3 0 3 3 0 8 0 mcl2k2 2112 9 0 0 1 0 1 1 0 8 0 mcl2k 2048 315 0 0 39 1 38 39 0 8 0 mtagpl 96 21 0 0 1 0 1 1 0 8 0 mbufpl 256 1305 0 0 74 0 74 74 0 8 0 pool(0xffffffff82e2e178:mbufpl): page inconsistency: page 0x0; 0 on list, 0 missing, 16 items per page pool(0xffffffff82e2e178:mbufpl): page inconsistency: page 0x0; 0 on list, 0 missing, 16 items per page bufpl 280 9207 0 2952 447 0 447 447 0 8 0 anonpl 24 431724 0 425290 112 44 68 71 0 186 6 amapchunkpl 152 70290 0 69618 62 23 39 42 0 158 9 amappl16 200 10464 0 10349 57 37 20 20 0 8 7 amappl15 192 18 0 18 2 2 0 1 0 8 0 amappl14 184 259 0 239 4 2 2 2 0 8 0 amappl13 176 17 0 17 2 2 0 1 0 8 0 amappl12 168 3652 0 3621 4 2 2 3 0 8 0 amappl11 160 55 0 41 1 0 1 1 0 8 0 amappl10 152 69 0 60 1 0 1 1 0 8 0 amappl9 144 196 0 195 2 1 1 1 0 8 0 amappl8 136 524 0 428 5 0 5 5 0 8 0 amappl7 128 106 0 90 1 0 1 1 0 8 0 amappl6 120 730 0 704 2 0 2 2 0 8 0 amappl5 112 303 0 288 1 0 1 1 0 8 0 amappl4 104 841 0 786 3 1 2 3 0 8 0 amappl3 96 13802 0 13717 3 0 3 3 0 8 0 amappl2 88 3171 0 3092 4 2 2 4 0 8 0 amappl1 80 19293 0 18745 23 10 13 23 0 8 0 amappl 88 21226 0 21029 6 0 6 6 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 96 0 13 2 0 2 2 0 8 0 uaddrrnd 24 2601 0 2565 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2601 0 2565 1 0 1 1 0 8 0 vmmpekpl 168 21907 0 21838 4 0 4 4 0 8 0 vmmpepl 168 180827 0 178794 158 49 109 121 0 357 1 vmsppl 440 2601 0 2565 6 1 5 5 0 8 0 rwobjpl 56 55040 0 47868 103 1 102 102 0 8 0 pdppl 4096 5210 0 5138 240 164 76 79 0 8 3 pool(0xffffffff82e4fbd8:pdppl): page inconsistency: page 0x60c500000000; 0 on list, 0 missing, 1 items per page pool(0xffffffff82e4fbd8:pdppl): page inconsistency: page 0x2000; 0 on list, 0 missing, 1 items per page pvpl 32 49242 0 0 398 0 398 398 0 265 0 pmappl 248 2601 0 2565 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 634 0 206 13 0 13 13 0 8 0 phpool: pool(0xffffffff82d62010:phpool): page inconsistency: page 0x0; at page head addr 0xfffffd806488bf90 (p 0xfffffd806488b000) ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82d27ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x44 sys/dev/kcov.c:164 intr_handler(ffff8000373b0d40,ffff80000067b300) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:539 Xintr_ioapic_edge26_untramp() at Xintr_ioapic_edge26_untramp+0x18f __sanitizer_cov_trace_const_cmp8(fffffd806f03f6c0,ffff8000373b1188) at __sanitizer_cov_trace_const_cmp8+0xf sys/dev/kcov.c:240 kqueue_scan(ffff8000373b0f80,8,ffff8000373b1080,ffff8000373b1188,ffff80002d6af9d8,ffff8000373b11c8) at kqueue_scan+0x1bc sys/kern/kern_event.c:1394 sys_kevent(ffff80002d6af9d8,ffff8000373b1310,ffff8000373b1260) at sys_kevent+0x567 sys/kern/kern_event.c:1062 syscall(ffff8000373b1310) at syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff8000373b1310) at syscall+0x8cf sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2650baa10, count: 4 ddb{0}> trace x86_ipi_db(ffffffff82d27ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x44 sys/dev/kcov.c:164 intr_handler(ffff8000373b0d40,ffff80000067b300) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:539 Xintr_ioapic_edge26_untramp() at Xintr_ioapic_edge26_untramp+0x18f __sanitizer_cov_trace_const_cmp8(fffffd806f03f6c0,ffff8000373b1188) at __sanitizer_cov_trace_const_cmp8+0xf sys/dev/kcov.c:240 kqueue_scan(ffff8000373b0f80,8,ffff8000373b1080,ffff8000373b1188,ffff80002d6af9d8,ffff8000373b11c8) at kqueue_scan+0x1bc sys/kern/kern_event.c:1394 sys_kevent(ffff80002d6af9d8,ffff8000373b1310,ffff8000373b1260) at sys_kevent+0x567 sys/kern/kern_event.c:1062 syscall(ffff8000373b1310) at syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff8000373b1310) at syscall+0x8cf sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2650baa10, count: -11 ddb{0}> machine ddbcpu 1 Stopped at pool_do_get+0x2dc: movq 0(%rax),%rax pool_do_get(ffffffff82e4fbd8,1,ffff80002f0f1118) at pool_do_get+0x2dc pool_update_curpage sys/kern/subr_pool.c:1059 [inline] pool_do_get(ffffffff82e4fbd8,1,ffff80002f0f1118) at pool_do_get+0x2dc sys/kern/subr_pool.c:765 pool_get(ffffffff82e4fbd8,1) at pool_get+0xf0 sys/kern/subr_pool.c:582 pmap_create() at pmap_create+0x144 sys/arch/amd64/amd64/pmap.c:1369 uvmspace_fork(ffff8000ffffb0e0) at uvmspace_fork+0x64 uvmspace_init sys/uvm/uvm_map.c:3302 [inline] uvmspace_fork(ffff8000ffffb0e0) at uvmspace_fork+0x64 uvmspace_alloc sys/uvm/uvm_map.c:3280 [inline] uvmspace_fork(ffff8000ffffb0e0) at uvmspace_fork+0x64 sys/uvm/uvm_map.c:3852 process_new(ffff8000ffff6540,ffff8000ffffb0e0,1) at process_new+0x3dc sys/kern/kern_fork.c:278 fork1(ffff80002d6af228,1,ffffffff821ef240,0,ffff80002f0f13a0,0) at fork1+0x2ef sys/kern/kern_fork.c:399 syscall(ffff80002f0f1450) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80002f0f1450) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7212c53b6840, count: 7 ddb{1}> trace pool_do_get(ffffffff82e4fbd8,1,ffff80002f0f1118) at pool_do_get+0x2dc pool_update_curpage sys/kern/subr_pool.c:1059 [inline] pool_do_get(ffffffff82e4fbd8,1,ffff80002f0f1118) at pool_do_get+0x2dc sys/kern/subr_pool.c:765 pool_get(ffffffff82e4fbd8,1) at pool_get+0xf0 sys/kern/subr_pool.c:582 pmap_create() at pmap_create+0x144 sys/arch/amd64/amd64/pmap.c:1369 uvmspace_fork(ffff8000ffffb0e0) at uvmspace_fork+0x64 uvmspace_init sys/uvm/uvm_map.c:3302 [inline] uvmspace_fork(ffff8000ffffb0e0) at uvmspace_fork+0x64 uvmspace_alloc sys/uvm/uvm_map.c:3280 [inline] uvmspace_fork(ffff8000ffffb0e0) at uvmspace_fork+0x64 sys/uvm/uvm_map.c:3852 process_new(ffff8000ffff6540,ffff8000ffffb0e0,1) at process_new+0x3dc sys/kern/kern_fork.c:278 fork1(ffff80002d6af228,1,ffffffff821ef240,0,ffff80002f0f13a0,0) at fork1+0x2ef sys/kern/kern_fork.c:399 syscall(ffff80002f0f1450) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80002f0f1450) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7212c53b6840, count: -8