panic: kernel diagnostic assertion "sc->sc_dev == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/net/if_tun.c", line 316 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *499041 43007 0 0x2 0 0K ifconfig 206942 98531 77 0x100012 0x1 1 dhcpleased db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336f904) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833ae430,ffffffff833fa0fe,13c,ffffffff832ed918) at __assert+0x29 sys/kern/subr_prf.c:-1 tun_clone_destroy(ffff80000148b800) at tun_clone_destroy+0x38a if_clone_destroy(ffff80002a499610) at if_clone_destroy+0x1d5 sys/net/if.c:1389 ifioctl(ffff80000159a930,80206979,ffff80002a499610,ffff80003bc2fcc0) at ifioctl+0x59d sys/net/if.c:2066 sys_ioctl(ffff80003bc2fcc0,ffff80002a4997f0,ffff80002a499740) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80002a4997f0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a4997f0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e644f05c5a0, 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: kernel diagnostic assertion "sc->sc_dev == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/net/if_tun.c", line 316 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336f904) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833ae430,ffffffff833fa0fe,13c,ffffffff832ed918) at __assert+0x29 sys/kern/subr_prf.c:-1 tun_clone_destroy(ffff80000148b800) at tun_clone_destroy+0x38a if_clone_destroy(ffff80002a499610) at if_clone_destroy+0x1d5 sys/net/if.c:1389 ifioctl(ffff80000159a930,80206979,ffff80002a499610,ffff80003bc2fcc0) at ifioctl+0x59d sys/net/if.c:2066 sys_ioctl(ffff80003bc2fcc0,ffff80002a4997f0,ffff80002a499740) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80002a4997f0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a4997f0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e644f05c5a0, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a4993c0 rbx 0xffffffff83826ddf cpu_info_full_primary+0x2ddf rdx 0 rcx 0xffff80003bc2fcc0 rax 0xffffffff83825ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xb472c8b0e1e5c4c6 r11 0x92fb7ee0418df2b1 r12 0xffffffff83826be0 cpu_info_full_primary+0x2be0 r13 0 r14 0 r15 0x1 rip 0xffffffff81a1edf5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a4993b0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (ifconfig) tid=499041 pid=43007 tcnt=1 stat=onproc flags process=2 proc=0 runpri=50, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003bc2fa28,0xffffffff839a66d0 process=0xffff80002a3030d8 user=0xffff80002a494000, vmspace=0xfffffd80768ab5c0 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *43007 499041 97276 0 7 0x2 ifconfig 97276 280207 76446 0 3 0x10008a sigsusp sh 76446 401692 58408 0 3 0x82 wait syz-executor 74868 335963 28676 0 3 0x80 nanoslp syz-executor 74868 326845 28676 0 3 0x4000080 fsleep syz-executor 74868 294888 28676 0 3 0x4000080 sbwait syz-executor 74868 468605 28676 0 3 0x4000080 fsleep syz-executor 90456 119059 79636 0 3 0x80 nanoslp syz-executor 90456 207959 79636 0 3 0x4000080 netcon syz-executor 90456 221811 79636 0 3 0x4000080 fsleep syz-executor 96797 447754 61328 60929 3 0x90 nanoslp syz-executor 96797 154090 61328 60929 3 0x4000090 kqsel syz-executor 96797 383838 61328 60929 3 0x4000090 fsleep syz-executor 34732 368201 81269 0 3 0x80 nanoslp syz-executor 34732 404371 81269 0 3 0x4000080 kqread syz-executor 34732 92089 81269 0 3 0x4000080 fsleep syz-executor 74641 509349 13389 0 3 0x80 nanoslp syz-executor 74641 227803 13389 0 3 0x4000080 lockf syz-executor 74641 175954 13389 0 3 0x4000080 lockf syz-executor 74641 46147 13389 0 3 0x4000080 fsleep syz-executor 27082 145300 36331 0 3 0x80 nanoslp syz-executor 27082 254978 36331 0 3 0x4000080 msgwait syz-executor 27082 161619 36331 0 3 0x4000080 fsleep syz-executor 61328 451779 58408 0 2 0xc82 syz-executor 46515 352569 0 0 3 0x14280 nfsidl nfsio 81953 404815 0 0 3 0x14280 nfsidl nfsio 12667 99728 0 0 3 0x14280 nfsidl nfsio 89995 256922 0 0 3 0x14280 nfsidl nfsio 92552 503864 0 0 3 0x14280 nfsidl nfsio 6377 248200 0 0 3 0x14280 nfsidl nfsio 66882 191228 0 0 3 0x14280 nfsidl nfsio 48489 367057 0 0 3 0x14280 nfsidl nfsio 36314 140210 0 0 3 0x14280 nfsidl nfsio 23618 473101 0 0 3 0x14280 nfsidl nfsio 19119 67210 0 0 3 0x14280 nfsidl nfsio 87301 205755 0 0 3 0x14280 nfsidl nfsio 4291 290716 0 0 3 0x14280 nfsidl nfsio 49423 237345 0 0 3 0x14280 nfsidl nfsio 82883 253631 0 0 3 0x14280 nfsidl nfsio 93835 24513 0 0 3 0x14280 nfsidl nfsio 3193 472999 0 0 3 0x14280 nfsidl nfsio 29785 175691 0 0 3 0x14280 nfsidl nfsio 71296 367949 0 0 3 0x14280 nfsidl nfsio 90057 124981 0 0 3 0x14280 nfsidl nfsio 52345 124218 0 0 3 0x14200 bored sosplice 79636 185309 58408 0 2 0xc82 syz-executor 28676 466522 58408 0 2 0xc82 syz-executor 36331 364520 58408 0 3 0x82 nanoslp syz-executor 13389 402657 58408 0 3 0x82 nanoslp syz-executor 84423 490686 58408 0 3 0x82 wait syz-executor 81269 114843 58408 0 3 0x82 nanoslp syz-executor 58408 480501 83631 0 3 0x82 kqread syz-executor 83631 118606 63166 0 3 0x10008a sigsusp ksh 63166 322104 15938 0 3 0x98 kqread sshd-session 15938 146193 14757 0 3 0x92 kqread sshd-session 74727 386333 1 0 3 0x100083 ttyin getty 14757 492792 1 0 3 0x88 kqread sshd 5131 239055 88920 74 3 0x1100092 bpf pflogd 88920 445456 1 0 3 0x80 sbwait pflogd 47011 492606 26696 73 3 0x1100090 kqread syslogd 26696 420419 1 0 3 0x100082 sbwait syslogd 30823 297037 1 0 3 0x100080 kqread resolvd 98531 206942 87439 77 7 0x100013 dhcpleased 35783 235384 87439 77 3 0x100092 kqread dhcpleased 87439 180879 1 0 3 0x80 kqread dhcpleased 75077 167487 0 0 3 0x14200 bored smr 51248 464664 0 0 3 0x14200 pgzero zerothread 73280 152718 0 0 3 0x14200 aiodoned aiodoned 66560 63602 0 0 3 0x14200 syncer update 76169 52464 0 0 3 0x14200 cleaner cleaner 11060 372621 0 0 3 0x14200 reaper reaper 72300 357126 0 0 3 0x14200 pgdaemon pagedaemon 2192 267863 0 0 3 0x14200 bored viomb 71249 9926 0 0 3 0x40014200 acpi0 acpi0 26166 459052 0 0 3 0x40014200 idle1 33182 65861 0 0 3 0x14200 bored softnet7 70504 191366 0 0 3 0x14200 bored softnet6 33346 206505 0 0 3 0x14200 bored softnet5 57554 337317 0 0 3 0x14200 bored softnet4 46239 420924 0 0 3 0x14200 bored softnet3 14536 248503 0 0 3 0x14200 bored softnet2 22904 83807 0 0 3 0x14200 bored softnet1 39482 481619 0 0 3 0x14200 bored softnet0 15281 75659 0 0 3 0x14200 bored systqmp 78962 274296 0 0 3 0x14200 bored systq 26552 11925 0 0 3 0x14200 tmoslp softclockmp 93583 78744 0 0 2 0x40014200 softclock 10249 222226 0 0 3 0x40014200 idle0 1 349401 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 43007 (ifconfig) thread 0xffff80003bc2fcc0 (499041) exclusive rwlock clonelk r = 0 (0xffffffff837a3008) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 if_clone_destroy+0x67 sys/net/if.c:-1 #3 ifioctl+0x59d sys/net/if.c:2066 #4 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83921c88) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 ifioctl+0x58c sys/net/if.c:2066 #2 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #3 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #4 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10215 11096K 11706K 166960K 11901 0 pcb 18 13K 14K 166960K 132 0 rtable 222 9K 9K 166960K 386 0 pf 35 17K 67485K 166960K 102 0 ifaddr 40 6K 7K 166960K 72 0 ifgroup 55 2K 2K 166960K 118 0 sysctl 4 1K 9K 166960K 9 0 counters 68 36K 37K 166960K 114 0 ioctlops 0 0K 4K 166960K 1542 0 iov 0 0K 32K 166960K 20 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1374 86K 87K 166960K 1756 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 25 0 dirhash 12 2K 3K 166960K 27 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 19 69K 236K 166960K 649 0 sigio 0 0K 0K 166960K 16 0 proc 80 147K 196K 166960K 653 0 subproc 72 4K 4K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 215 0 in_multi 88 6K 7K 166960K 137 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 2 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 445 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 254 161K 175K 166960K 7344 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 44 88K 106K 166960K 1778 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 20 0 NDP 14 0K 2K 166960K 50 0 temp 49 8640K 8719K 166960K 32659 0 kqueue 15 24K 31K 166960K 110 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 69 0 66 1 0 1 1 0 8 0 rtentry 176 129 0 38 5 0 5 5 0 8 0 unpcb 144 410 0 391 4 0 4 4 0 8 3 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 736 235 0 229 7 0 7 7 0 8 6 arp 128 15 0 5 1 0 1 1 0 8 0 inpcb 328 586 0 571 7 0 7 7 0 8 5 nd6 144 23 0 8 1 0 1 1 0 8 0 pkpcb 40 6 0 6 1 0 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1192 12 0 12 1 0 1 1 0 8 1 pppxif 1504 1 0 1 1 1 0 1 0 8 0 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 3 0 1 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfrktable 1344 1 0 1 1 0 1 1 0 8 1 pfstitem 24 44 0 1 1 0 1 1 0 8 0 pfstkey 128 44 0 1 2 0 2 2 0 8 0 pfstate 384 44 0 1 5 0 5 5 0 8 0 pfrule 1344 24 0 19 2 1 1 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 559 0 147 29 0 29 29 0 8 3 art_table 40 562 0 147 5 0 5 5 0 8 0 art_node 32 128 0 47 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 1 1 0 1 1 0 8 0 semapl 112 21 0 11 1 0 1 1 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 2492 0 976 96 0 96 96 0 8 0 ffsino 296 2492 0 976 118 0 118 118 0 8 0 nchpl 144 3351 0 1646 64 0 64 64 0 8 0 rtmask 32 3 0 3 2 1 1 1 0 8 1 uvmvnodes 80 2798 0 0 58 0 58 58 0 8 0 vnodes 216 2798 0 0 156 0 156 156 0 8 0 namei 1024 10986 0 10986 2 1 1 2 0 8 1 percpumem 16 72 0 23 1 0 1 1 0 8 0 kstatmem 264 62 0 36 2 0 2 2 0 8 0 scxspl 216 19687 0 19687 10 2 8 8 1 8 8 plimitpl 152 106 0 88 1 0 1 1 0 8 0 sigapl 424 957 0 881 9 0 9 9 0 8 0 knotepl 120 366 0 0 12 0 12 12 0 8 0 kqueuepl 224 222 0 207 3 0 3 3 0 8 2 pipepl 344 165 0 138 3 0 3 3 0 8 0 fdescpl 528 912 0 879 3 0 3 3 0 8 0 filepl 160 4451 0 4219 14 0 14 14 0 8 3 lockfpl 104 177 0 171 1 0 1 1 0 8 0 lockfspl 48 75 0 72 1 0 1 1 0 8 0 sessionpl 144 26 0 17 1 0 1 1 0 8 0 pgrppl 48 110 0 93 1 0 1 1 0 8 0 ucredpl 104 575 0 559 1 0 1 1 0 8 0 zombiepl 144 882 0 881 1 0 1 1 0 8 0 processpl 1248 957 0 881 6 0 6 6 0 8 0 procpl 664 1795 0 1705 8 0 8 8 0 8 0 sosppl 168 3 0 3 1 0 1 1 0 8 1 sockpl 752 1085 0 1048 14 0 14 14 0 8 9 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 111 0 0 14 0 14 14 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 1154 0 0 72 0 72 72 0 8 0 bufpl 280 8268 0 2125 439 0 439 439 0 8 0 anonpl 32 9511 0 0 77 0 77 77 0 246 0 amapchunkpl 152 23747 0 23219 31 3 28 28 0 158 7 amappl16 200 3094 0 3061 21 4 17 17 0 8 8 amappl15 192 12 0 12 2 2 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 1588 0 1555 4 1 3 3 0 8 0 amappl11 160 54 0 40 1 0 1 1 0 8 0 amappl10 152 2 0 2 1 1 0 1 0 8 0 amappl9 144 268 0 268 1 1 0 1 0 8 0 amappl8 136 22 0 20 1 0 1 1 0 8 0 amappl7 128 105 0 93 1 0 1 1 0 8 0 amappl6 120 199 0 193 1 0 1 1 0 8 0 amappl5 112 131 0 121 1 0 1 1 0 8 0 amappl4 104 305 0 283 1 0 1 1 0 8 0 amappl3 96 4569 0 4450 4 0 4 4 0 8 0 amappl2 88 668 0 601 2 0 2 2 0 8 0 amappl1 80 10430 0 9821 15 1 14 15 0 8 0 amappl 88 6545 0 6365 5 0 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 7 0 7 2 1 1 1 0 8 1 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 912 0 879 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 912 0 879 1 0 1 1 0 8 0 vmmpekpl 168 9037 0 8993 3 0 3 3 0 8 0 vmmpepl 168 63137 0 61073 106 2 104 106 0 357 7 vmsppl 488 911 0 879 5 0 5 5 0 8 0 rwobjpl 80 21846 0 18069 79 1 78 78 0 8 0 pdppl 4096 1832 0 1758 102 28 74 86 0 8 0 pvpl 32 18554 0 0 151 1 150 150 0 265 0 pmappl 256 911 0 879 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 342 0 32 9 0 9 9 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(ffffffff8336f904) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833ae430,ffffffff833fa0fe,13c,ffffffff832ed918) at __assert+0x29 sys/kern/subr_prf.c:-1 tun_clone_destroy(ffff80000148b800) at tun_clone_destroy+0x38a if_clone_destroy(ffff80002a499610) at if_clone_destroy+0x1d5 sys/net/if.c:1389 ifioctl(ffff80000159a930,80206979,ffff80002a499610,ffff80003bc2fcc0) at ifioctl+0x59d sys/net/if.c:2066 sys_ioctl(ffff80003bc2fcc0,ffff80002a4997f0,ffff80002a499740) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80002a4997f0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a4997f0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e644f05c5a0, count: -9 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+0xf kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf sys/dev/kcov.c:153 ktrstruct(ffff8000ffff3238,ffffffff8339ac38,ffff80002a2cf890,20) at ktrstruct+0xdf sys/kern/kern_ktrace.c:313 sys_kevent(ffff8000ffff3238,ffff80002a2cfc10,ffff80002a2cfb60) at sys_kevent+0x7bf sys/kern/kern_event.c:1327 syscall(ffff80002a2cfc10) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2cfc10) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7057d0dedc10, 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+0xf kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf sys/dev/kcov.c:153 ktrstruct(ffff8000ffff3238,ffffffff8339ac38,ffff80002a2cf890,20) at ktrstruct+0xdf sys/kern/kern_ktrace.c:313 sys_kevent(ffff8000ffff3238,ffff80002a2cfc10,ffff80002a2cfb60) at sys_kevent+0x7bf sys/kern/kern_event.c:1327 syscall(ffff80002a2cfc10) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2cfc10) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7057d0dedc10, count: -8