kernel: protection fault trap, code=0 Stopped at icmp_mtudisc_timeout+0xc1: movq 0(%rax),%rcx ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace icmp_mtudisc_timeout(fffffd806b2bdb10,0) at icmp_mtudisc_timeout+0xc1 sys/netinet/ip_icmp.c:1072 rt_timer_queue_flush(ffffffff82d5f688) at rt_timer_queue_flush+0x1f8 sys/net/route.c:1541 ip_sysctl(ffff80002e568b1c,1,0,ffff80002e568b48,20001100,4) at ip_sysctl+0x55b sys/netinet/ip_input.c:1659 sys_sysctl(ffff80002a270550,ffff80002e568c80,ffff80002e568be0) at sys_sysctl+0x217 sys/kern/kern_sysctl.c:254 syscall(ffff80002e568c80) at syscall+0x53b mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff80002e568c80) at syscall+0x53b sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8bb70278450, count: -6 ddb{0}> show registers rdi 0x14 rsi 0x14 rbp 0xffff80002e568a00 rbx 0x3 rdx 0xffff800000ef4f80 rcx 0xffff80002a270550 rax 0x46e81cfe4840fb9e r8 0xffffffff824de5e0 tcp_mtudisc_increase r9 0x3 r10 0x10e7c75937af85ed r11 0x3ce1b430e3dedbe1 r12 0xffff8000001a02a8 r13 0x14 r14 0 r15 0xfffffd806b2bdb10 rip 0xffffffff810e7f11 icmp_mtudisc_timeout+0xc1 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e5689b0 ss 0x10 icmp_mtudisc_timeout+0xc1: movq 0(%rax),%rcx ddb{0}> show proc PROC (syz-executor.0) tid=377852 pid=69639 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a22b008,0xffff80002a26f020 process=0xffff800033f7f568 user=0xffff80002e563000, vmspace=0xfffffd805d3aa1e0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 53381 523986 13127 0 2 0 syz-executor.3 53381 84161 13127 0 3 0x4000080 fsleep syz-executor.3 53381 212493 13127 0 3 0x4000080 fsleep syz-executor.3 46450 408832 61963 0 2 0 syz-executor.5 46450 319267 61963 0 3 0x4000080 fsleep syz-executor.5 46450 395411 61963 0 3 0x4000080 fsleep syz-executor.5 69639 510284 78514 0 2 0 syz-executor.0 *69639 377852 78514 0 7 0x4000000 syz-executor.0 73056 192389 79512 0 3 0x80 nanoslp syz-executor.1 73056 315140 79512 0 3 0x4000080 kqread syz-executor.1 73056 275220 79512 0 3 0x4000080 fsleep syz-executor.1 16193 108456 38289 0 7 0 syz-executor.6 16193 217394 38289 0 3 0x4000080 fsleep syz-executor.6 16193 503351 38289 0 3 0x4000080 fsleep syz-executor.6 83829 497670 27210 0 3 0x80 nanoslp syz-executor.4 83829 215058 27210 0 3 0x4000080 netcon syz-executor.4 83829 519800 27210 0 3 0x4000080 fsleep syz-executor.4 83829 192290 27210 0 3 0x4000080 fsleep syz-executor.4 55965 16488 49498 0 3 0x80 nanoslp syz-executor.2 55965 171556 49498 0 3 0x4000080 rest syz-executor.2 55965 60450 49498 0 3 0x4000080 bell syz-executor.2 55965 142897 49498 0 3 0x4000080 fsleep syz-executor.2 38289 58990 20161 0 3 0x82 nanoslp syz-executor.6 49498 204162 20161 0 3 0x82 nanoslp syz-executor.2 27210 331513 20161 0 3 0x82 nanoslp syz-executor.4 78514 149900 20161 0 3 0x82 nanoslp syz-executor.0 46614 98099 0 0 3 0x14200 acct acct 78939 452728 20161 0 2 0x2 syz-executor.7 79512 136876 20161 0 3 0x82 nanoslp syz-executor.1 13127 20429 20161 0 3 0x82 nanoslp syz-executor.3 61963 122510 20161 0 3 0x82 nanoslp syz-executor.5 17671 360045 1 0 3 0x18100083 ttyin getty 16133 165106 0 0 3 0x14200 bored sosplice 98599 382137 0 0 3 0x14280 nfsidl nfsio 18092 209886 0 0 3 0x14280 nfsidl nfsio 65274 421127 0 0 3 0x14280 nfsidl nfsio 70626 171205 0 0 3 0x14280 nfsidl nfsio 77482 343031 0 0 3 0x14280 nfsidl nfsio 34955 93501 0 0 3 0x14280 nfsidl nfsio 2591 309924 0 0 3 0x14280 nfsidl nfsio 12933 140379 0 0 3 0x14280 nfsidl nfsio 22015 483947 0 0 3 0x14280 nfsidl nfsio 86768 232463 0 0 3 0x14280 nfsidl nfsio 36024 288373 0 0 3 0x14280 nfsidl nfsio 92958 67108 0 0 3 0x14280 nfsidl nfsio 18405 428417 0 0 3 0x14280 nfsidl nfsio 54893 202659 0 0 3 0x14280 nfsidl nfsio 50696 236125 0 0 3 0x14280 nfsidl nfsio 36911 341343 0 0 3 0x14280 nfsidl nfsio 76232 301922 0 0 3 0x14280 nfsidl nfsio 86081 45329 0 0 3 0x14280 nfsidl nfsio 5439 513766 0 0 3 0x14280 nfsidl nfsio 37268 235175 0 0 3 0x14280 nfsidl nfsio 20161 170815 82441 0 2 0x1a000082 syz-fuzzer 20161 39965 82441 0 3 0x1e000082 nanoslp syz-fuzzer 20161 368941 82441 0 3 0x1e000082 thrsleep syz-fuzzer 20161 433884 82441 0 3 0x1e000082 wait syz-fuzzer 20161 61394 82441 0 3 0x1e000082 wait syz-fuzzer 20161 376843 82441 0 2 0x1e000082 syz-fuzzer 20161 189227 82441 0 3 0x1e000082 thrsleep syz-fuzzer 20161 356718 82441 0 3 0x1e000082 thrsleep syz-fuzzer 20161 491898 82441 0 3 0x1e000082 wait syz-fuzzer 20161 135413 82441 0 3 0x1e000082 wait syz-fuzzer 20161 476766 82441 0 3 0x1e000082 thrsleep syz-fuzzer 20161 46781 82441 0 3 0x1e000082 wait syz-fuzzer 20161 29780 82441 0 3 0x1e000082 wait syz-fuzzer 20161 229546 82441 0 3 0x1e000082 wait syz-fuzzer 20161 59381 82441 0 3 0x1e000082 thrsleep syz-fuzzer 20161 288992 82441 0 3 0x1e000082 wait syz-fuzzer 82441 40730 6761 0 3 0x810008a sigsusp ksh 6761 384537 68828 0 2 0x1800009a sshd 68828 212759 1 0 3 0x18000088 kqread sshd 5733 520535 42624 74 3 0x19100092 bpf pflogd 42624 409106 1 0 3 0x18000080 netio pflogd 29448 264231 51626 73 3 0x19100090 kqread syslogd 51626 308359 1 0 3 0x18100082 netio syslogd 19325 134138 1 0 3 0x18100080 kqread resolvd 8752 19711 13158 77 3 0x18100092 kqread dhcpleased 99072 120021 13158 77 3 0x18100092 kqread dhcpleased 13158 209667 1 0 3 0x18000080 kqread dhcpleased 55551 347097 0 0 3 0x14200 bored smr 44670 440426 0 0 2 0x14200 zerothread 13959 16314 0 0 3 0x14200 aiodoned aiodoned 60750 278889 0 0 3 0x14200 syncer update 56691 52310 0 0 3 0x14200 cleaner cleaner 71728 48334 0 0 3 0x14200 reaper reaper 11278 287448 0 0 3 0x14200 pgdaemon pagedaemon 51890 360798 0 0 3 0x14200 bored viomb 8371 319554 0 0 3 0x40014200 acpi0 acpi0 86384 255555 0 0 3 0x40014200 idle1 20027 293763 0 0 3 0x14200 bored softnet3 83774 322511 0 0 3 0x14200 bored softnet2 19347 294551 0 0 3 0x14200 bored softnet1 77253 241964 0 0 3 0x14200 bored softnet0 26171 194808 0 0 3 0x14200 bored systqmp 68306 314388 0 0 3 0x14200 bored systq 49082 309500 0 0 3 0x14200 tmoslp softclockmp 35737 112477 0 0 3 0x40014200 tmoslp softclock 66015 65621 0 0 3 0x40014200 idle0 1 400231 0 0 3 0x8080082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 69639 (syz-executor.0) thread 0xffff80002a270550 (377852) exclusive rwlock netlock r = 0 (0xffffffff82d15f30) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1187 #1 ip_sysctl+0x34e sys/netinet/ip_input.c:1656 #2 sys_sysctl+0x217 sys/kern/kern_sysctl.c:254 #3 syscall+0x53b mi_syscall sys/sys/syscall_mi.h:183 [inline] #3 syscall+0x53b sys/arch/amd64/amd64/trap.c:577 #4 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82d60cf8) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1187 #1 syscall+0x522 mi_syscall sys/sys/syscall_mi.h:183 [inline] #1 syscall+0x522 sys/arch/amd64/amd64/trap.c:577 #2 Xsyscall+0x128 Process 78939 (syz-executor.7) thread 0xffff80002a270aa0 (452728) exclusive rrwlock inode r = 0 (0xfffffd806e4aa928) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1187 #1 rw_enter+0x32a sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8e sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x85 sys/kern/vfs_vnops.c:564 #5 vget+0x1fd sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ufs_lookup+0x1373 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:566 #11 namei+0x56a sys/kern/vfs_lookup.c:250 #12 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1855 #13 syscall+0x53b mi_syscall sys/sys/syscall_mi.h:183 [inline] #13 syscall+0x53b sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8065dc74d8) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1187 #1 rw_enter+0x32a sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8e sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x85 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd3 sys/kern/vfs_lookup.c:418 #6 namei+0x56a sys/kern/vfs_lookup.c:250 #7 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1855 #8 syscall+0x53b mi_syscall sys/sys/syscall_mi.h:183 [inline] #8 syscall+0x53b sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10222 6500K 7252K 166960K 33680 0 pcb 15 18K 20K 166960K 1277 0 rtable 202 6K 8K 166960K 2584 0 pf 35 10K 10K 166960K 304 0 ifaddr 41 16K 18K 166960K 313 0 ifgroup 60 2K 3K 166960K 474 0 sysctl 3 0K 1K 166960K 10 0 counters 66 36K 37K 166960K 318 0 ioctlops 0 0K 4K 166960K 2014 0 iov 0 0K 24K 166960K 1720 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1555 98K 98K 166960K 7622 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 116 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 1315 0 dirhash 12 2K 2K 166960K 96 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 17 61K 81K 166960K 11784 0 sigio 0 0K 0K 166960K 488 0 proc 75 91K 128K 166960K 2045 0 subproc 104 6K 6K 166960K 626 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 615 0 in_multi 78 5K 7K 166960K 647 0 ether_multi 1 0K 0K 166960K 12 0 mrt 1 0K 0K 166960K 12 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 1K 166960K 1849 0 pfkey data 0 0K 0K 166960K 75 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 531 509K 511K 166960K 116909 0 UVM aobj 131 9K 9K 166960K 134 0 pinsyscall 26 52K 108K 166960K 2599 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 410 0 NDP 13 0K 2K 166960K 237 0 temp 74 6812K 6940K 166960K 111294 0 kqueue 13 18K 28K 166960K 936 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 602 0 599 8 7 1 5 0 8 0 rtentry 112 776 0 685 5 1 4 4 0 8 0 unpcb 144 9936 0 9915 97 92 5 8 0 8 4 syncache 336 91 0 91 18 17 1 1 0 8 1 sackhl 24 3 0 3 1 1 0 1 0 8 0 tcpqe 32 190 0 190 14 14 0 1 0 8 0 tcpcb 808 3779 0 3767 109 101 8 15 0 8 5 arp 120 166 0 151 1 0 1 1 0 8 0 ipq 40 2 0 2 1 1 0 1 0 8 0 ipqe 40 6 0 6 1 1 0 1 0 8 0 inpcb 392 9989 0 9974 145 133 12 15 0 8 8 nd6 136 152 0 132 1 0 1 1 0 8 0 pkpcb 40 107 0 107 10 10 0 1 0 8 0 kcovpl 48 47 0 39 1 0 1 1 0 8 0 ppxss 1168 50 0 50 14 14 0 1 0 8 0 pffrag 232 135 0 132 3 2 1 1 0 482 0 pffrnode 88 135 0 132 3 2 1 1 0 8 0 pffrent 40 304 0 301 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 24 352 0 339 1 0 1 1 0 8 0 pfstkey 128 353 0 340 3 2 1 2 0 8 0 pfstate 376 353 0 340 10 7 3 5 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 5 0 3 2 1 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2601 0 2216 58 27 31 31 0 8 0 art_table 32 2602 0 2216 5 0 5 5 0 8 0 art_node 16 767 0 686 1 0 1 1 0 8 0 sysvmsgpl 40 18 0 14 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 1312 0 1302 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 73 0 56 3 0 3 3 0 8 0 dino2pl 256 16295 0 14721 99 0 99 99 0 8 0 ffsino 272 16295 0 14721 106 0 106 106 0 8 0 nchpl 144 32001 0 30271 67 0 67 67 0 8 0 uvmvnodes 80 6504 0 0 133 0 133 133 0 8 0 vnodes 216 6504 0 0 362 0 362 362 0 8 0 namei 1024 108029 0 108029 6 5 1 2 0 8 1 percpumem 16 173 0 126 1 0 1 1 0 8 0 vcpupl 2048 152 0 2 19 0 19 19 0 8 0 vmpool 696 168 0 18 14 0 14 14 0 8 0 kstatmem 264 278 0 252 7 4 3 3 0 8 1 scxspl 216 101106 0 101106 35 34 1 8 1 8 1 plimitpl 152 1203 0 1187 1 0 1 1 0 8 0 sigapl 424 12049 0 11979 14 5 9 9 0 8 0 futexpl 64 85454 0 85444 6 5 1 1 0 8 0 knotepl 120 942 0 0 19 1 18 18 0 8 0 kqueuepl 216 2493 0 2484 43 42 1 8 0 8 0 pipepl 320 2131 0 2102 64 60 4 13 0 8 1 fdescpl 496 12008 0 11978 10 5 5 5 0 8 0 filepl 152 69021 0 68768 112 97 15 24 0 8 4 lockfpl 104 2828 0 2825 5 4 1 2 0 8 0 lockfspl 48 1073 0 1070 1 0 1 1 0 8 0 sessionpl 144 65 0 48 1 0 1 1 0 8 0 pgrppl 48 121 0 104 1 0 1 1 0 8 0 ucredpl 104 8903 0 8890 1 0 1 1 0 8 0 zombiepl 144 11979 0 11979 3 2 1 1 0 8 1 processpl 1136 12049 0 11979 6 0 6 6 0 8 0 procpl 680 32460 0 32360 12 3 9 10 0 8 0 srpgc 96 61 0 61 19 18 1 1 0 8 1 sosppl 168 152 0 149 16 15 1 1 0 8 0 sockpl 584 20659 0 20618 159 147 12 17 0 8 7 mcl64k 65536 30 0 0 4 1 3 3 0 8 0 mcl16k 16384 18 0 0 3 0 3 3 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 25 0 0 2 0 2 2 0 8 0 mcl8k 8192 26 0 0 3 0 3 3 0 8 0 mcl4k 4096 49 0 0 4 1 3 3 0 8 0 mcl2k2 2112 14 0 0 1 0 1 1 0 8 0 mcl2k 2048 384 0 0 35 17 18 35 0 8 0 mtagpl 96 432 0 0 6 0 6 6 0 8 0 mbufpl 256 1406 0 0 64 0 64 64 0 8 0 bufpl 280 23791 0 17287 465 0 465 465 0 8 0 anonpl 24 1398110 0 1381902 261 84 177 177 0 186 62 amapchunkpl 152 373780 0 372717 105 35 70 72 0 158 25 amappl16 200 27658 0 27124 94 59 35 51 0 8 0 amappl15 192 108 0 106 1 0 1 1 0 8 0 amappl14 184 332 0 314 3 1 2 2 0 8 0 amappl13 176 27 0 27 4 4 0 1 0 8 0 amappl12 168 13284 0 13249 3 1 2 2 0 8 0 amappl11 160 66 0 52 1 0 1 1 0 8 0 amappl10 152 117 0 100 1 0 1 1 0 8 0 amappl9 144 325 0 325 20 19 1 1 0 8 1 amappl8 136 746 0 598 6 0 6 6 0 8 0 amappl7 128 127 0 112 1 0 1 1 0 8 0 amappl6 120 984 0 954 3 1 2 2 0 8 0 amappl5 112 584 0 568 1 0 1 1 0 8 0 amappl4 104 1141 0 1092 3 1 2 3 0 8 0 amappl3 96 71434 0 71329 3 0 3 3 0 8 0 amappl2 88 12932 0 12845 4 2 2 4 0 8 0 amappl1 80 52524 0 51976 23 11 12 23 0 8 0 amappl 88 115620 0 115299 11 3 8 8 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 12176 0 11996 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 12176 0 11996 2 0 2 2 0 8 0 vmmpekpl 168 88576 0 88473 5 0 5 5 0 8 0 vmmpepl 168 736290 0 733286 370 230 140 161 0 357 0 vmsppl 448 12175 0 11996 23 2 21 21 0 8 0 rwobjpl 56 184300 0 175843 128 8 120 120 0 8 0 pdppl 4096 24359 0 24142 711 492 219 219 0 8 2 pvpl 32 45946 0 0 372 1 371 372 0 265 0 pmappl 248 12175 0 11996 12 0 12 12 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1454 0 829 19 0 19 19 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace icmp_mtudisc_timeout(fffffd806b2bdb10,0) at icmp_mtudisc_timeout+0xc1 sys/netinet/ip_icmp.c:1072 rt_timer_queue_flush(ffffffff82d5f688) at rt_timer_queue_flush+0x1f8 sys/net/route.c:1541 ip_sysctl(ffff80002e568b1c,1,0,ffff80002e568b48,20001100,4) at ip_sysctl+0x55b sys/netinet/ip_input.c:1659 sys_sysctl(ffff80002a270550,ffff80002e568c80,ffff80002e568be0) at sys_sysctl+0x217 sys/kern/kern_sysctl.c:254 syscall(ffff80002e568c80) at syscall+0x53b mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff80002e568c80) at syscall+0x53b sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8bb70278450, count: -6 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800029cebff0) 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+0x41 sys/dev/kcov.c:164 syscall(ffff80003251cdf0) at syscall+0x522 mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff80003251cdf0) at syscall+0x522 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7112263f87c0, count: -6