panic: lock (rwlock) solock not locked Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *107441 49512 32767 0x10 0x4000000 0K syz-executor.1 477884 48086 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82585177) at panic+0x177 sys/kern/subr_prf.c:198 witness_assert(fffffd806f3c8020,4) at witness_assert+0x3ef sys/kern/subr_witness.c:1950 somove(fffffd8068520408,1) at somove+0x25d sbspace sys/sys/socketvar.h:209 [inline] somove(fffffd8068520408,1) at somove+0x25d sys/kern/uipc_socket.c:1487 sosplice(fffffd8068520408,4,0,0) at sosplice+0x50b sys/kern/uipc_socket.c:1346 sosetopt(fffffd8068520408,ffff,1023,fffffd80690f5000) at sosetopt+0x7f4 sys_setsockopt(ffff8000fffef500,ffff800027e0ffe8,ffff800027e10030) at sys_setsockopt+0x1f6 sys/kern/uipc_syscalls.c:1233 syscall(ffff800027e100b0) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff800027e100b0) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc8096dec5d0, count: 6 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: lock (rwlock) solock not locked ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82585177) at panic+0x177 sys/kern/subr_prf.c:198 witness_assert(fffffd806f3c8020,4) at witness_assert+0x3ef sys/kern/subr_witness.c:1950 somove(fffffd8068520408,1) at somove+0x25d sbspace sys/sys/socketvar.h:209 [inline] somove(fffffd8068520408,1) at somove+0x25d sys/kern/uipc_socket.c:1487 sosplice(fffffd8068520408,4,0,0) at sosplice+0x50b sys/kern/uipc_socket.c:1346 sosetopt(fffffd8068520408,ffff,1023,fffffd80690f5000) at sosetopt+0x7f4 sys_setsockopt(ffff8000fffef500,ffff800027e0ffe8,ffff800027e10030) at sys_setsockopt+0x1f6 sys/kern/uipc_syscalls.c:1233 syscall(ffff800027e100b0) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff800027e100b0) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc8096dec5d0, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800027e0fce0 rbx 0xffffffff829bab8f cpu_info_full_primary+0x2b8f rdx 0xffff800000bed440 rcx 0 rax 0xffff8000fffef500 r8 0x101010101010101 r9 0x8080808080808080 r10 0xc3fdb0312b5f6e68 r11 0xd62c53b31ff565f2 r12 0xffffffff829ba990 cpu_info_full_primary+0x2990 r13 0 r14 0 r15 0x1 rip 0xffffffff81fd76c8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800027e0fcd0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.1) pid=107441 stat=onproc flags process=10 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800022d5d268,0xffffffff82b7cfd0 process=0xffff8000ffff31f8 user=0xffff800027e0b000, vmspace=0xfffffd807366be68 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 49512 85348 14653 32767 2 0x10 syz-executor.1 49512 234310 14653 32767 3 0x4000090 netcon2 syz-executor.1 *49512 107441 14653 32767 7 0x4000010 syz-executor.1 97851 246178 12939 32767 3 0x90 nanoslp syz-executor.0 12939 326424 53417 0 3 0x82 wait syz-executor.0 98455 392741 69140 32767 3 0x90 piperd syz-executor.2 69140 332690 53417 0 3 0x82 wait syz-executor.2 14653 438831 62345 32767 3 0x90 nanoslp syz-executor.1 62345 322953 53417 0 3 0x82 wait syz-executor.1 84657 413990 80309 32767 2 0x10 syz-executor.6 80309 120713 53417 0 3 0x82 wait syz-executor.6 71080 169753 85444 32767 3 0x90 nanoslp syz-executor.7 85444 506694 53417 0 3 0x82 wait syz-executor.7 1549 104331 0 0 3 0x14200 bored sosplice 98758 346655 33053 32767 3 0x90 nanoslp syz-executor.5 52967 373064 86410 32767 3 0x90 piperd syz-executor.3 86410 192380 53417 0 3 0x82 wait syz-executor.3 33053 122949 53417 0 3 0x82 wait syz-executor.5 59261 462015 10396 32767 3 0x90 piperd syz-executor.4 10396 153213 53417 0 3 0x82 wait syz-executor.4 53417 501057 38842 0 3 0x82 thrsleep syz-fuzzer 53417 453353 38842 0 3 0x4000082 nanoslp syz-fuzzer 53417 141566 38842 0 3 0x4000082 wait syz-fuzzer 53417 326919 38842 0 3 0x4000082 thrsleep syz-fuzzer 53417 130180 38842 0 3 0x4000082 wait syz-fuzzer 53417 38064 38842 0 3 0x4000082 thrsleep syz-fuzzer 53417 162676 38842 0 3 0x4000082 wait syz-fuzzer 53417 164703 38842 0 3 0x4000082 thrsleep syz-fuzzer 53417 401112 38842 0 3 0x4000082 thrsleep syz-fuzzer 53417 105696 38842 0 3 0x4000082 wait syz-fuzzer 53417 357650 38842 0 3 0x4000082 wait syz-fuzzer 53417 289395 38842 0 3 0x4000082 wait syz-fuzzer 53417 245349 38842 0 3 0x4000082 kqread syz-fuzzer 53417 424606 38842 0 3 0x4000082 thrsleep syz-fuzzer 53417 6127 38842 0 3 0x4000082 wait syz-fuzzer 53417 255589 38842 0 3 0x4000082 wait syz-fuzzer 38842 17710 44450 0 3 0x10008a sigsusp ksh 44450 3573 48395 0 3 0x9a kqread sshd 4078 197838 1 0 3 0x100083 ttyin getty 48395 177364 1 0 3 0x88 kqread sshd 86727 281265 14682 73 3 0x1100090 kqread syslogd 14682 114963 1 0 3 0x100082 netio syslogd 18944 508235 1 0 3 0x100080 kqread resolvd 23487 257868 15390 77 3 0x100092 kqread dhcpleased 29131 176825 15390 77 3 0x100092 kqread dhcpleased 15390 250900 1 0 3 0x80 kqread dhcpleased 43409 353616 0 0 3 0x14200 bored smr 28180 134154 0 0 2 0x14200 zerothread 21345 41408 0 0 3 0x14200 aiodoned aiodoned 57059 306336 0 0 3 0x14200 syncer update 2712 258200 0 0 3 0x14200 cleaner cleaner 48086 477884 0 0 7 0x14200 reaper 48054 440663 0 0 3 0x14200 pgdaemon pagedaemon 51821 204590 0 0 3 0x14200 bored viomb 32830 256199 0 0 3 0x40014200 acpi0 acpi0 43003 149863 0 0 3 0x40014200 idle1 98609 269997 0 0 3 0x14200 bored softnet 59616 31882 0 0 3 0x14200 bored softnet 64580 251830 0 0 3 0x14200 bored softnet 29350 47215 0 0 3 0x14200 bored softnet 65754 31862 0 0 3 0x14200 bored systqmp 14808 134559 0 0 3 0x14200 bored systq 22692 365449 0 0 3 0x40014200 bored softclock 86655 498593 0 0 3 0x40014200 idle0 1 79782 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 1: exclusive mutex &(curpg)->mdpage.pv_mtx r = 0 (0xfffffd8003766dd8) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pmap_page_remove+0x44 sys/arch/amd64/amd64/pmap.c:1911 #4 uvm_anfree_list+0x98 #5 amap_wipeout+0x1b1 sys/uvm/uvm_amap.c:504 #6 uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1351 #7 uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2541 #8 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436 #9 reaper+0x19a sys/kern/kern_exit.c:448 #10 proc_trampoline+0x1c Process 49512 (syz-executor.1) thread 0xffff8000fffef500 (107441) exclusive rwlock netlock r = 0 (0xffffffff82971a40) #0 witness_lock+0x44d #1 sys_setsockopt+0x1de sys/kern/uipc_syscalls.c:1233 #2 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #2 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #3 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82a8d100) #0 witness_lock+0x44d #1 syscall+0x41d mi_syscall sys/sys/syscall_mi.h:100 [inline] #1 syscall+0x41d sys/arch/amd64/amd64/trap.c:585 #2 Xsyscall+0x128 Process 84657 (syz-executor.6) thread 0xffff80002ca52d28 (413990) exclusive rrwlock inode r = 0 (0xfffffd806901fd60) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1353 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1150 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 #10 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #10 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806eb11f88) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:412 #6 namei+0x36a sys/kern/vfs_lookup.c:244 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3097 #8 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #8 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 Process 48086 (reaper) thread 0xffff800021233a48 (477884) exclusive kernel: protection fault trap, code=0 Faulted in DDB; continuing... ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10217 6412K 6420K 78643K 11354 0 pcb 13 12K 14K 78643K 17 0 rtable 238 6K 7K 78643K 8599 0 ifaddr 82 17K 17K 78643K 191 0 sysctl 3 1K 2K 78643K 17 0 counters 56 35K 35K 78643K 86 0 ioctlops 0 0K 2K 78643K 247 0 iov 0 0K 32K 78643K 3000 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1271 79K 79K 78643K 3288 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 133 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 3851 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 19 69K 121K 78643K 12032 0 sigio 0 0K 0K 78643K 179 0 proc 56 78K 115K 78643K 1843 0 subproc 104 6K 6K 78643K 299 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1009 0 in_multi 99 6K 7K 78643K 372 0 ether_multi 1 0K 0K 78643K 47 0 mrt 2 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 247 1102K 1102K 78643K 247 0 exec 0 0K 2K 78643K 3035 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 328 91K 538K 78643K 73892 0 UVM aobj 131 8K 8K 78643K 136 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 310 0 NDP 11 0K 2K 78643K 72 0 temp 124 4726K 4854K 78643K 31590 0 kqueue 12 18K 28K 78643K 1165 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 8524 0 8519 46 43 3 6 0 8 2 rtentry 112 289 0 177 4 0 4 4 0 8 0 unpcb 144 12076 0 12061 109 106 3 10 0 8 2 syncache 296 154 0 154 24 23 1 1 0 8 1 tcpqe 32 59 0 59 19 18 1 1 0 8 1 tcpcb 768 5422 0 5397 174 171 3 15 0 8 0 arp 120 51 0 33 1 0 1 1 0 8 0 ipq 40 11 0 10 7 6 1 1 0 8 0 ipqe 40 102 0 99 7 6 1 1 0 8 0 inpcb 368 11213 0 11196 178 172 6 16 0 8 3 nd6 48 79 0 53 1 0 1 1 0 8 0 kcovpl 48 23 0 15 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1174 0 715 32 3 29 30 0 8 0 art_table 32 1175 0 715 4 0 4 4 0 8 0 art_node 16 288 0 186 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 8 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 3849 0 3839 1 0 1 1 0 8 0 shmpl 112 133 0 5 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 17530 0 16057 93 0 93 93 0 8 0 ffsino 272 17530 0 16057 99 0 99 99 0 8 0 nchpl 144 33686 0 32049 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 117085 0 117084 4 3 1 2 0 8 0 percpumem 16 55 0 15 1 0 1 1 0 8 0 kstatmem 264 52 0 30 2 0 2 2 0 8 0 scxspl 216 101859 0 101859 41 37 4 8 0 8 4 plimitpl 152 2794 0 2772 10 8 2 2 0 8 1 sigapl 424 12287 0 12236 7 0 7 7 0 8 0 futexpl 64 107208 0 107208 2 1 1 1 0 8 1 knotepl 120 854 0 0 17 4 13 17 0 8 0 kqueuepl 216 4232 0 4224 74 71 3 8 0 8 2 pipepl 320 2901 0 2873 65 57 8 11 0 8 5 fdescpl 496 12269 0 12239 7 2 5 6 0 8 0 filepl 152 92350 0 92112 156 139 17 22 0 8 6 lockfpl 104 1752 0 1750 3 2 1 2 0 8 0 lockfspl 48 509 0 507 1 0 1 1 0 8 0 sessionpl 144 38 0 22 1 0 1 1 0 8 0 pgrppl 48 391 0 375 1 0 1 1 0 8 0 ucredpl 104 14005 0 13987 1 0 1 1 0 8 0 zombiepl 144 12239 0 12236 1 0 1 1 0 8 0 processpl 1064 12287 0 12236 5 1 4 5 0 8 0 procpl 672 36014 0 35946 14 6 8 9 0 8 0 srpgc 96 8 0 8 3 3 0 1 0 8 0 sosppl 168 203 0 199 16 15 1 1 0 8 0 sockpl 488 32423 0 32381 526 512 14 34 0 8 7 mcl64k 65536 33 0 0 3 0 3 3 0 8 0 mcl16k 16384 33 0 0 3 0 3 3 0 8 0 mcl12k 12288 49 0 0 3 1 2 3 0 8 0 mcl9k 9216 23 0 0 2 0 2 2 0 8 0 mcl8k 8192 36 0 0 3 0 3 3 0 8 0 mcl4k 4096 51 0 0 4 0 4 4 0 8 0 mcl2k2 2112 14 0 0 1 0 1 1 0 8 0 mcl2k 2048 438 0 0 34 13 21 34 0 8 0 mtagpl 96 8 0 0 1 0 1 1 0 8 0 mbufpl 256 7224 0 0 422 0 422 422 0 8 0 bufpl 288 23220 0 16893 453 0 453 453 0 8 0 anonpl 24 2431010 0 2418537 193 98 95 109 0 186 0 amapchunkpl 152 674786 0 674181 4480 4413 67 2224 0 158 39 amappl16 200 34788 0 34412 145 123 22 34 0 8 0 amappl15 192 221 0 213 1 0 1 1 0 8 0 amappl14 184 793 0 784 1 0 1 1 0 8 0 amappl13 176 2847 0 2844 1 0 1 1 0 8 0 amappl12 168 1559 0 1550 1 0 1 1 0 8 0 amappl11 160 1739 0 1723 1 0 1 1 0 8 0 amappl10 152 38 0 33 1 0 1 1 0 8 0 amappl9 144 3993 0 3984 1 0 1 1 0 8 0 amappl8 136 2992 0 2852 5 0 5 5 0 8 0 amappl7 128 2018 0 1996 1 0 1 1 0 8 0 amappl6 120 3771 0 3750 2 1 1 2 0 8 0 amappl5 112 7700 0 7686 1 0 1 1 0 8 0 amappl4 104 3235 0 3196 2 0 2 2 0 8 0 amappl3 96 41502 0 41448 12 10 2 3 0 8 0 amappl2 88 5229 0 5183 3 1 2 2 0 8 0 amappl1 80 305825 0 305190 20 3 17 20 0 8 0 amappl 88 72653 0 72486 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 72 135 0 5 3 0 3 3 0 8 0 uaddrrnd 24 12269 0 12239 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 12269 0 12239 1 0 1 1 0 8 0 vmmpekpl 168 105262 0 105199 4 0 4 4 0 8 0 vmmpepl 168 1211285 0 1208855 253 117 136 144 0 357 5 vmsppl 368 12268 0 12238 4 0 4 4 0 8 0 rwobjpl 56 303344 0 295891 123 14 109 111 0 8 0 pdppl 4096 24545 0 24476 355 274 81 93 0 8 12 pvpl 32 4577957 0 4560698 378 208 170 255 0 265 0 pmappl 248 12268 0 12238 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1694 0 467 36 0 36 36 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82585177) at panic+0x177 sys/kern/subr_prf.c:198 witness_assert(fffffd806f3c8020,4) at witness_assert+0x3ef sys/kern/subr_witness.c:1950 somove(fffffd8068520408,1) at somove+0x25d sbspace sys/sys/socketvar.h:209 [inline] somove(fffffd8068520408,1) at somove+0x25d sys/kern/uipc_socket.c:1487 sosplice(fffffd8068520408,4,0,0) at sosplice+0x50b sys/kern/uipc_socket.c:1346 sosetopt(fffffd8068520408,ffff,1023,fffffd80690f5000) at sosetopt+0x7f4 sys_setsockopt(ffff8000fffef500,ffff800027e0ffe8,ffff800027e10030) at sys_setsockopt+0x1f6 sys/kern/uipc_syscalls.c:1233 syscall(ffff800027e100b0) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff800027e100b0) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc8096dec5d0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020dd8ff0) at x86_ipi_db+0x1a 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+0x23 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 kd_curproc sys/dev/kcov.c:577 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 sys/dev/kcov.c:148 __mp_lock(ffffffff82a8cef8) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82a8cef8) at __mp_lock+0x133 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff800021239410,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1367 uvm_map_teardown(fffffd80743bae78) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2541 uvmspace_free(fffffd80743bae78) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436 reaper(ffff800021233a48) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: 6 ddb{1}> trace x86_ipi_db(ffff800020dd8ff0) at x86_ipi_db+0x1a 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+0x23 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 kd_curproc sys/dev/kcov.c:577 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 sys/dev/kcov.c:148 __mp_lock(ffffffff82a8cef8) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82a8cef8) at __mp_lock+0x133 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff800021239410,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1367 uvm_map_teardown(fffffd80743bae78) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2541 uvmspace_free(fffffd80743bae78) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436 reaper(ffff800021233a48) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: -9