kernel: protection fault trap, code=0 Stopped at pf_anchor_global_RB_REMOVE+0x58: movq 0(%r12),%rbx ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace pf_anchor_global_RB_REMOVE(ffffffff82a09208,ffff800000cd5800) at pf_anchor_global_RB_REMOVE+0x58 sys/net/pf_ruleset.c:84 pf_remove_if_empty_ruleset(ffff800000cd5c90) at pf_remove_if_empty_ruleset+0xdd sys/net/pf_ruleset.c:300 pfi_dynaddr_setup(ffff800000ba1778,0) at pfi_dynaddr_setup+0x411 sys/net/pf_if.c:485 pfioctl(4900,cd60441a,ffff800000c15000,3,ffff80002e3b17b0) at pfioctl+0x8de7 pf_addr_setup sys/net/pf_ioctl.c:894 [inline] pfioctl(4900,cd60441a,ffff800000c15000,3,ffff80002e3b17b0) at pfioctl+0x8de7 sys/net/pf_ioctl.c:1656 VOP_IOCTL(fffffd806f6768e8,cd60441a,ffff800000c15000,3,fffffd807f7d7060,ffff80002e3b17b0) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8067091130,cd60441a,ffff800000c15000,ffff80002e3b17b0) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80002e3b17b0,ffff80002c934a18,ffff80002c934a70) at sys_ioctl+0x4a2 syscall(ffff80002c934ae0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002c934ae0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd93f2596980, count: -9 ddb{0}> show registers rdi 0xffff800028719000 rsi 0x140d __ALIGN_SIZE+0x40d rbp 0xffff80002c9344f0 rbx 0xffffffff82a09208 pf_anchors rdx 0xffff800028719000 rcx 0x140c __ALIGN_SIZE+0x40c rax 0xffffffff8113719b pf_anchor_global_RB_REMOVE+0x2b r8 0x400 r9 0x8080808080808080 r10 0x68eec129e3210284 r11 0x22584b5ebf7bc9a1 r12 0x34bf12f411b17669 r13 0xffffffff82a09210 pf_main_anchor r14 0xffff800000cd5800 r15 0xdeaf007fdeafbead rip 0xffffffff811371c8 pf_anchor_global_RB_REMOVE+0x58 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff80002c9344a0 ss 0x10 pf_anchor_global_RB_REMOVE+0x58: movq 0(%r12),%rbx ddb{0}> show proc PROC (syz-executor.6) pid=49221 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff80002e3b0d30,0xffff80002e3b1520 process=0xffff8000fffeba48 user=0xffff80002c92f000, vmspace=0xfffffd807c5565d8 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 56689 206901 73312 0 2 0 syz-executor.0 10471 115735 21229 0 2 0 syz-executor.7 10853 235167 25187 0 2 0 syz-executor.6 *10853 49221 25187 0 7 0x4000000 syz-executor.6 9146 376813 2202 0 2 0 syz-executor.1 85869 88549 82976 0 2 0 syz-executor.2 85869 190304 82976 0 3 0x4000080 fsleep syz-executor.2 58147 130176 30261 0 2 0 syz-executor.4 60885 252148 79873 0 3 0x80 nanoslp syz-executor.3 60885 303384 79873 0 2 0x4000000 syz-executor.3 60885 152319 79873 0 3 0x4000080 fsleep syz-executor.3 60885 371972 79873 0 3 0x4000080 fsleep syz-executor.3 60885 398108 79873 0 3 0x4000080 fsleep syz-executor.3 21229 497290 63300 0 3 0x82 nanoslp syz-executor.7 82247 225368 63300 0 3 0x82 piperd syz-executor.5 86690 299351 0 0 3 0x14280 nfsidl nfsio 50054 52483 0 0 3 0x14280 nfsidl nfsio 38522 478517 0 0 3 0x14280 nfsidl nfsio 11124 424204 0 0 3 0x14280 nfsidl nfsio 75042 74625 0 0 3 0x14280 nfsidl nfsio 76965 92706 0 0 3 0x14280 nfsidl nfsio 3335 462736 0 0 3 0x14280 nfsidl nfsio 75569 457604 0 0 3 0x14280 nfsidl nfsio 31162 342114 0 0 3 0x14280 nfsidl nfsio 35241 67888 0 0 3 0x14280 nfsidl nfsio 4817 219531 0 0 3 0x14280 nfsidl nfsio 67504 324795 0 0 3 0x14280 nfsidl nfsio 77706 323448 0 0 3 0x14280 nfsidl nfsio 47653 164533 0 0 3 0x14280 nfsidl nfsio 80004 136255 0 0 3 0x14280 nfsidl nfsio 13806 52313 0 0 3 0x14280 nfsidl nfsio 81901 516438 0 0 3 0x14280 nfsidl nfsio 24396 439225 0 0 3 0x14280 nfsidl nfsio 56421 376605 0 0 3 0x14280 nfsidl nfsio 91603 206840 0 0 3 0x14280 nfsidl nfsio 73312 204731 63300 0 3 0x82 nanoslp syz-executor.0 79873 327274 63300 0 3 0x82 nanoslp syz-executor.3 30261 338947 63300 0 3 0x82 nanoslp syz-executor.4 76550 42651 0 0 3 0x14200 bored sosplice 25187 168077 63300 0 2 0x2 syz-executor.6 82976 19062 63300 0 3 0x82 nanoslp syz-executor.2 2202 224295 63300 0 3 0x82 nanoslp syz-executor.1 63300 512524 91199 0 3 0x82 thrsleep syz-fuzzer 63300 161911 91199 0 3 0x4000082 nanoslp syz-fuzzer 63300 244887 91199 0 3 0x4000082 thrsleep syz-fuzzer 63300 286875 91199 0 3 0x4000082 thrsleep syz-fuzzer 63300 388281 91199 0 3 0x4000082 thrsleep syz-fuzzer 63300 363836 91199 0 3 0x4000082 kqread syz-fuzzer 63300 298915 91199 0 3 0x4000082 thrsleep syz-fuzzer 63300 36413 91199 0 3 0x4000082 thrsleep syz-fuzzer 63300 437824 91199 0 7 0x4000002 syz-fuzzer 91199 16305 85495 0 3 0x10008a sigsusp ksh 85495 502403 39452 0 3 0x9a kqread sshd 62789 46782 1 0 3 0x100083 ttyin getty 39452 436625 1 0 3 0x88 kqread sshd 77538 261210 23621 74 3 0x1100092 bpf pflogd 23621 37443 1 0 3 0x80 netio pflogd 69811 442575 37101 73 3 0x1100090 kqread syslogd 37101 342300 1 0 3 0x100082 netio syslogd 68024 520326 1 0 3 0x100080 kqread resolvd 96749 455746 8324 77 3 0x100092 kqread dhcpleased 72964 334472 8324 77 3 0x100092 kqread dhcpleased 8324 163446 1 0 3 0x80 kqread dhcpleased 32968 197495 0 0 3 0x14200 bored smr 26502 382390 0 0 2 0x14200 zerothread 89209 219981 0 0 3 0x14200 aiodoned aiodoned 45319 181695 0 0 3 0x14200 syncer update 43808 518264 0 0 3 0x14200 cleaner cleaner 63253 434977 0 0 3 0x14200 reaper reaper 92133 490070 0 0 3 0x14200 pgdaemon pagedaemon 70968 177095 0 0 3 0x14200 bored viomb 97015 487191 0 0 3 0x40014200 acpi0 acpi0 7364 75514 0 0 3 0x40014200 idle1 77380 136671 0 0 3 0x14200 bored softnet 82731 257816 0 0 3 0x14200 bored softnet 85106 413990 0 0 3 0x14200 bored softnet 90063 189454 0 0 3 0x14200 bored softnet 50739 21738 0 0 3 0x14200 bored systqmp 63392 50815 0 0 3 0x14200 bored systq 82786 267168 0 0 3 0x40014200 bored softclock 96417 322990 0 0 3 0x40014200 idle0 1 432739 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 10853 (syz-executor.6) thread 0xffff80002e3b17b0 (49221) exclusive rwlock pf_lock r = 0 (0xffffffff82985bf0) #0 witness_lock+0x44d #1 pfioctl+0x5dc6 sys/net/pf_ioctl.c:1608 #2 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #3 vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 #4 sys_ioctl+0x4a2 #5 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #6 Xsyscall+0x128 exclusive rwlock netlock r = 0 (0xffffffff82949cf0) #0 witness_lock+0x44d #1 pfioctl+0x38b8 sys/net/pf_ioctl.c:1608 #2 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #3 vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 #4 sys_ioctl+0x4a2 #5 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #6 Xsyscall+0x128 exclusive rwlock pfioctl_rw r = 0 (0xffffffff82985c50) #0 witness_lock+0x44d #1 pfioctl+0x15e sys/net/pf_ioctl.c:1148 #2 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #3 vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 #4 sys_ioctl+0x4a2 #5 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82a0acc8) #0 witness_lock+0x44d #1 vn_ioctl+0x41 sys/kern/vfs_vnops.c:514 #2 sys_ioctl+0x4a2 #3 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #3 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #4 Xsyscall+0x128 Process 63300 (syz-fuzzer) thread 0xffff8000fffefa48 (437824) exclusive rwlock amaplk r = 0 (0xfffffd806c819278) #0 witness_lock+0x44d #1 uvm_fault_check+0x3ca sys/uvm/uvm_fault.c:774 #2 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #3 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #4 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806ee65d10) #0 witness_lock+0x44d #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1762 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 #3 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #4 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #5 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #6 recall_trap+0x8 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10344 6621K 7457K 78643K 17995 0 pcb 13 12K 14K 78643K 311 0 rtable 193 7K 8K 78643K 672 0 ifaddr 84 18K 19K 78643K 278 0 sysctl 2 0K 0K 78643K 2 0 counters 52 35K 36K 78643K 104 0 ioctlops 1 4K 4K 78643K 1876 0 iov 0 0K 12K 78643K 133 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1373 86K 86K 78643K 3415 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 14 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 224 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 17 61K 93K 78643K 1703 0 sigio 0 0K 0K 78643K 19 0 proc 70 91K 115K 78643K 830 0 subproc 104 6K 6K 78643K 224 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 27 0 in_multi 81 5K 6K 78643K 220 0 ether_multi 1 0K 0K 78643K 7 0 mrt 1 0K 0K 78643K 13 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 1512 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 7 26K 26K 78643K 7 0 UVM amap 276 232K 232K 78643K 11876 0 UVM aobj 15 2K 2K 78643K 15 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 2 0K 0K 78643K 81 0 NDP 11 0K 1K 78643K 71 0 temp 132 4742K 4986K 78643K 12752 0 kqueue 12 18K 24K 78643K 171 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 120 150 0 147 3 2 1 3 0 8 0 rtentry 112 218 0 134 4 0 4 4 0 8 0 unpcb 136 1120 0 1105 16 10 6 7 0 8 5 syncache 296 4 0 4 1 1 0 1 0 8 0 tcpqe 32 120 0 120 1 1 0 1 0 8 0 tcpcb 736 316 0 308 17 15 2 7 0 8 1 arp 120 36 0 22 1 0 1 1 0 8 0 inpcb 312 1303 0 1295 17 11 6 7 0 8 5 ip6q 72 3 0 3 1 1 0 1 0 8 0 ip6af 40 9 0 9 1 1 0 1 0 8 0 nd6 48 54 0 33 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 2 0 1 0 8 0 kcovpl 48 17 0 9 1 0 1 1 0 8 0 ppxss 1248 8 0 8 2 2 0 1 0 8 0 pfstscr 40 3 0 3 1 0 1 1 0 8 1 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 4 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 4 1 1 1 0 1 1 0 8 0 pftag 88 4 0 0 1 0 1 1 0 8 0 pfstitem 24 22 0 16 1 0 1 1 0 8 0 pfstkey 112 28 0 22 1 0 1 1 0 8 0 pfstate 336 25 0 19 2 1 1 2 0 8 0 pfrule 1360 64 0 50 2 0 2 2 0 8 0 rttmr 64 3 0 3 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 921 0 540 31 3 28 30 0 8 0 art_table 32 922 0 540 4 0 4 4 0 8 0 art_node 16 217 0 143 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 0 1 0 1 1 0 8 0 semapl 112 222 0 212 1 0 1 1 0 8 0 shmpl 112 12 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3760 0 2323 91 0 91 91 0 8 0 ffsino 272 3760 0 2323 97 0 97 97 0 8 0 nchpl 144 6294 0 4651 63 0 63 63 0 8 0 uvmvnodes 80 5503 0 0 113 0 113 113 0 8 0 vnodes 224 5503 0 0 324 0 324 324 0 8 0 namei 1024 25437 0 25437 2 1 1 2 0 8 1 percpumem 16 64 0 26 1 0 1 1 0 8 0 vcpupl 2048 74 0 0 10 0 10 10 0 8 0 vmpool 560 74 0 0 6 0 6 6 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 74 0 52 3 1 2 3 0 8 0 scxspl 216 16716 0 16716 13 12 1 8 0 8 1 plimitpl 152 285 0 270 1 0 1 1 0 8 0 sigapl 424 2014 0 1946 10 2 8 8 0 8 0 futexpl 64 14395 0 14391 1 0 1 1 0 8 0 knotepl 120 263 0 0 8 0 8 8 0 8 0 kqueuepl 216 355 0 347 7 4 3 5 0 8 2 pipepl 336 522 0 494 7 4 3 6 0 8 0 fdescpl 496 1976 0 1946 6 2 4 5 0 8 0 filepl 152 15047 0 14802 37 21 16 20 0 8 6 lockfpl 104 565 0 563 3 2 1 2 0 8 0 lockfspl 48 106 0 104 1 0 1 1 0 8 0 sessionpl 144 33 0 16 1 0 1 1 0 8 0 pgrppl 48 33 0 16 1 0 1 1 0 8 0 ucredpl 96 2562 0 2550 1 0 1 1 0 8 0 zombiepl 144 1946 0 1946 2 1 1 1 0 8 1 processpl 1064 2014 0 1946 5 0 5 5 0 8 0 procpl 672 5061 0 4979 14 5 9 9 0 8 1 srpgc 96 20 0 20 2 1 1 1 0 8 1 sosppl 168 10 0 10 2 2 0 1 0 8 0 sockpl 480 2577 0 2551 79 67 12 32 0 8 8 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 199 0 0 25 0 25 25 0 8 0 mtagpl 96 962 0 0 24 0 24 24 0 8 0 mbufpl 256 1208 0 0 74 0 74 74 0 8 0 bufpl 288 6269 0 153 437 0 437 437 0 8 0 anonpl 24 371759 0 354607 146 36 110 123 0 186 0 amapchunkpl 152 32199 0 31526 32 2 30 30 0 158 0 amappl16 200 4817 0 4253 50 17 33 41 0 8 0 amappl15 192 317 0 314 1 0 1 1 0 8 0 amappl14 184 362 0 354 1 0 1 1 0 8 0 amappl13 176 483 0 481 1 0 1 1 0 8 0 amappl12 168 18 0 14 1 0 1 1 0 8 0 amappl11 160 316 0 292 2 0 2 2 0 8 0 amappl10 152 149 0 139 1 0 1 1 0 8 0 amappl9 144 697 0 691 1 0 1 1 0 8 0 amappl8 136 1045 0 991 2 0 2 2 0 8 0 amappl7 128 474 0 460 1 0 1 1 0 8 0 amappl6 120 445 0 428 2 1 1 2 0 8 0 amappl5 112 1223 0 1205 1 0 1 1 0 8 0 amappl4 104 1592 0 1564 2 1 1 2 0 8 0 amappl3 96 5281 0 5236 2 0 2 2 0 8 0 amappl2 88 2646 0 2588 3 1 2 3 0 8 0 amappl1 80 48848 0 48222 21 6 15 20 0 8 1 amappl 88 11237 0 11058 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 14 0 0 1 0 1 1 0 8 0 uaddrrnd 24 2050 0 1946 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2050 0 1946 1 0 1 1 0 8 0 vmmpekpl 168 19524 0 19454 4 0 4 4 0 8 0 vmmpepl 168 197799 0 195097 156 30 126 134 0 357 2 vmsppl 368 2049 0 1946 11 1 10 10 0 8 0 rwobjpl 56 54701 0 47620 102 1 101 101 0 8 0 pdppl 4096 4107 0 3966 254 111 143 143 0 8 2 pvpl 32 831595 0 810228 274 92 182 243 0 265 0 pmappl 248 2049 0 1946 8 1 7 7 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1093 0 149 27 0 27 27 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace pf_anchor_global_RB_REMOVE(ffffffff82a09208,ffff800000cd5800) at pf_anchor_global_RB_REMOVE+0x58 sys/net/pf_ruleset.c:84 pf_remove_if_empty_ruleset(ffff800000cd5c90) at pf_remove_if_empty_ruleset+0xdd sys/net/pf_ruleset.c:300 pfi_dynaddr_setup(ffff800000ba1778,0) at pfi_dynaddr_setup+0x411 sys/net/pf_if.c:485 pfioctl(4900,cd60441a,ffff800000c15000,3,ffff80002e3b17b0) at pfioctl+0x8de7 pf_addr_setup sys/net/pf_ioctl.c:894 [inline] pfioctl(4900,cd60441a,ffff800000c15000,3,ffff80002e3b17b0) at pfioctl+0x8de7 sys/net/pf_ioctl.c:1656 VOP_IOCTL(fffffd806f6768e8,cd60441a,ffff800000c15000,3,fffffd807f7d7060,ffff80002e3b17b0) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8067091130,cd60441a,ffff800000c15000,ffff80002e3b17b0) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80002e3b17b0,ffff80002c934a18,ffff80002c934a70) at sys_ioctl+0x4a2 syscall(ffff80002c934ae0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002c934ae0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd93f2596980, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020ce8ff0) 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+0x2f kd_curproc sys/dev/kcov.c:578 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2f sys/dev/kcov.c:148 witness_lock(fffffd80082dc6e0,8) at witness_lock+0x4b6 find_instance sys/kern/subr_witness.c:1849 [inline] witness_lock(fffffd80082dc6e0,8) at witness_lock+0x4b6 sys/kern/subr_witness.c:1155 mtx_enter_try(fffffd80082dc6d0) at mtx_enter_try+0x100 mtx_enter(fffffd80082dc6d0) at mtx_enter+0x4b sys/kern/kern_lock.c:266 pmap_extract(fffffd80082dc6d0,215431000,ffff80002469e0d0) at pmap_extract+0xa2 sys/arch/amd64/amd64/pmap.c:1517 uvm_fault_upper_lookup(ffff80002469e270,ffff80002469e2a8,ffff80002469e170,ffff80002469e1f0) at uvm_fault_upper_lookup+0x129 sys/uvm/uvm_fault.c:852 uvm_fault(fffffd806ee65cf8,215430000,0,2) at uvm_fault+0x139 sys/uvm/uvm_fault.c:607 upageflttrap(ffff80002469e3e0,215430240) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff80002469e3e0) at usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x294bc5420, count: -13