panic: kernel diagnostic assertion "sc->sc_dev == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/net/if_tun.c", line 305 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 439066 18968 0 0 0x4000000 0 syz-executor.4 *283590 47191 0 0 0x4000000 1K syz-executor.2 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff825739a5) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825e91ae,ffffffff82632dac,131,ffffffff825fdeb9) at __assert+0x25 sys/kern/subr_prf.c:161 tun_clone_destroy(ffff800000be9000) at tun_clone_destroy+0x278 sys/net/if_tun.c:305 if_clone_destroy(ffff80002c763820) at if_clone_destroy+0x132 sys/net/if.c:1218 soo_ioctl(fffffd8066324e50,80206979,ffff80002c763820,ffff8000ffff47e0) at soo_ioctl+0x26c sys_ioctl(ffff8000ffff47e0,ffff80002c763938,ffff80002c763990) at sys_ioctl+0x4a2 syscall(ffff80002c763a00) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002c763a00) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa55d0743410, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: kernel diagnostic assertion "sc->sc_dev == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/net/if_tun.c", line 305 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff825739a5) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825e91ae,ffffffff82632dac,131,ffffffff825fdeb9) at __assert+0x25 sys/kern/subr_prf.c:161 tun_clone_destroy(ffff800000be9000) at tun_clone_destroy+0x278 sys/net/if_tun.c:305 if_clone_destroy(ffff80002c763820) at if_clone_destroy+0x132 sys/net/if.c:1218 soo_ioctl(fffffd8066324e50,80206979,ffff80002c763820,ffff8000ffff47e0) at soo_ioctl+0x26c sys_ioctl(ffff8000ffff47e0,ffff80002c763938,ffff80002c763990) at sys_ioctl+0x4a2 syscall(ffff80002c763a00) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002c763a00) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa55d0743410, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002c763630 rbx 0xffff800020ce9bff rdx 0xffff800000c85140 rcx 0 rax 0xffff8000ffff47e0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xbd4d9ba4619a981e r11 0x64d6128991d45033 r12 0xffff800020ce9a00 r13 0 r14 0 r15 0x1 rip 0xffffffff8147cfe8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002c763620 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.2) pid=283590 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2a88,0xffff800021143278 process=0xffff8000211a3a40 user=0xffff80002c75e000, vmspace=0xfffffd807bd6d010 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 94182 374331 26173 0 2 0 syz-executor.0 15900 59277 28130 0 2 0 syz-executor.6 15900 164166 28130 0 3 0x4000080 fsleep syz-executor.6 55108 447686 33283 0 3 0x80 nanoslp syz-executor.3 55108 322260 33283 0 3 0x4000080 fsleep syz-executor.3 55108 410779 33283 0 3 0x4000080 fsleep syz-executor.3 73887 480919 97456 0 3 0x80 nanoslp syz-executor.7 73887 305328 97456 0 3 0x4000080 fsleep syz-executor.7 73887 158309 97456 0 3 0x4000080 fsleep syz-executor.7 73887 344999 97456 0 3 0x4000080 fsleep syz-executor.7 18968 116463 78249 0 3 0x80 nanoslp syz-executor.4 18968 439066 78249 0 7 0x4000000 syz-executor.4 18968 84497 78249 0 3 0x4000080 fsleep syz-executor.4 47191 155412 28183 0 2 0 syz-executor.2 *47191 283590 28183 0 7 0x4000000 syz-executor.2 66302 214924 77057 0 2 0 syz-executor.1 66302 347158 77057 0 3 0x4000080 kqsel syz-executor.1 97456 21391 48131 0 3 0x82 nanoslp syz-executor.7 84612 173244 48131 0 2 0x2 syz-executor.5 28130 22953 48131 0 3 0x82 nanoslp syz-executor.6 77057 327516 48131 0 3 0x82 nanoslp syz-executor.1 33283 488417 48131 0 3 0x82 nanoslp syz-executor.3 78249 297528 48131 0 3 0x82 nanoslp syz-executor.4 28183 82055 48131 0 3 0x82 nanoslp syz-executor.2 26173 349715 48131 0 3 0x82 nanoslp syz-executor.0 5522 219098 0 0 3 0x14200 acct acct 23304 400733 1 0 3 0x100083 ttyopn getty 78744 338813 0 0 3 0x14280 nfsidl nfsio 37059 450326 0 0 3 0x14280 nfsidl nfsio 98758 69250 0 0 3 0x14280 nfsidl nfsio 9096 517822 0 0 3 0x14280 nfsidl nfsio 95223 222841 0 0 3 0x14280 nfsidl nfsio 50648 253138 0 0 3 0x14280 nfsidl nfsio 99019 183628 0 0 3 0x14280 nfsidl nfsio 5891 182657 0 0 3 0x14280 nfsidl nfsio 25295 334439 0 0 3 0x14280 nfsidl nfsio 2990 366750 0 0 3 0x14280 nfsidl nfsio 30830 16586 0 0 3 0x14280 nfsidl nfsio 65883 521768 0 0 3 0x14280 nfsidl nfsio 93610 503316 0 0 3 0x14280 nfsidl nfsio 6169 315162 0 0 3 0x14280 nfsidl nfsio 64574 517851 0 0 3 0x14280 nfsidl nfsio 72916 33227 0 0 3 0x14280 nfsidl nfsio 64868 457522 0 0 3 0x14280 nfsidl nfsio 80002 396332 0 0 3 0x14280 nfsidl nfsio 19961 185846 0 0 3 0x14280 nfsidl nfsio 65991 180208 0 0 3 0x14280 nfsidl nfsio 62576 483663 0 0 3 0x14200 bored sosplice 48131 468812 53258 0 3 0x82 thrsleep syz-fuzzer 48131 507387 53258 0 3 0x4000082 thrsleep syz-fuzzer 48131 483723 53258 0 3 0x4000082 kqread syz-fuzzer 48131 261468 53258 0 3 0x4000082 thrsleep syz-fuzzer 48131 46610 53258 0 3 0x4000082 thrsleep syz-fuzzer 48131 261303 53258 0 3 0x4000082 thrsleep syz-fuzzer 48131 401739 53258 0 3 0x4000082 thrsleep syz-fuzzer 48131 487462 53258 0 3 0x4000082 thrsleep syz-fuzzer 53258 241726 2135 0 3 0x10008a sigsusp ksh 2135 89119 88583 0 3 0x9a kqread sshd 88583 33821 1 0 3 0x88 kqread sshd 90952 237657 21265 74 3 0x100092 bpf pflogd 21265 154923 1 0 3 0x80 netio pflogd 27397 434871 92443 73 3 0x100090 kqread syslogd 92443 406565 1 0 3 0x100082 netio syslogd 34344 523484 1 0 3 0x100080 kqread resolvd 89665 456174 52255 77 2 0x100092 dhcpleased 76233 452936 52255 77 3 0x100092 kqread dhcpleased 52255 36360 1 0 3 0x80 kqread dhcpleased 60959 276781 0 0 3 0x14200 bored smr 68450 136961 0 0 2 0x14200 zerothread 21954 231466 0 0 3 0x14200 aiodoned aiodoned 91088 519006 0 0 3 0x14200 syncer update 23976 89385 0 0 3 0x14200 cleaner cleaner 53676 209135 0 0 3 0x14200 reaper reaper 77714 403001 0 0 3 0x14200 pgdaemon pagedaemon 51040 424208 0 0 3 0x14200 bored viomb 91858 396683 0 0 3 0x40014200 acpi0 acpi0 25914 79962 0 0 3 0x40014200 idle1 22723 451862 0 0 3 0x14200 bored softnet 99237 208671 0 0 3 0x14200 bored systqmp 73987 391115 0 0 3 0x14200 bored systq 61480 374362 0 0 3 0x40014200 bored softclock 76551 348340 0 0 3 0x40014200 idle0 1 164542 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 18968 (syz-executor.4) thread 0xffff800021156000 (439066) exclusive rwlock futex r = 0 (0xffffffff829a60b0) #0 witness_lock+0x44d #1 sys_futex+0x5c sys/kern/sys_futex.c:108 #2 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #2 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #3 Xsyscall+0x128 Process 47191 (syz-executor.2) thread 0xffff8000ffff47e0 (283590) exclusive rwlock clonelk r = 0 (0xffffffff828e4a20) #0 witness_lock+0x44d #1 if_clone_destroy+0x49 #2 soo_ioctl+0x26c #3 sys_ioctl+0x4a2 #4 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #4 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #5 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82a3d4a8) #0 witness_lock+0x44d #1 soo_ioctl+0x25a sys/kern/sys_socket.c:136 #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10235 6638K 8083K 78643K 27590 0 pcb 15 18K 23K 78643K 1126 0 rtable 263 31K 32K 78643K 3271 0 ifaddr 112 24K 26K 78643K 1445 0 sysctl 3 1K 1K 78643K 3 0 counters 58 35K 36K 78643K 230 0 ioctlops 0 0K 4K 78643K 3573 0 iov 0 0K 32K 78643K 977 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1595 100K 100K 78643K 7850 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 122 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 897 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 17 61K 97K 78643K 11104 0 sigio 0 0K 0K 78643K 205 0 proc 70 87K 111K 78643K 1814 0 subproc 104 6K 6K 78643K 508 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 611 0 in_multi 71 4K 7K 78643K 798 0 ether_multi 1 0K 0K 78643K 105 0 mrt 1 0K 0K 78643K 51 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 253 1129K 1129K 78643K 253 0 exec 0 0K 2K 78643K 3637 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 560 805K 814K 78643K 142826 0 UVM aobj 131 6K 6K 78643K 160 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 503 0 NDP 14 0K 1K 78643K 202 0 temp 169 4753K 4834K 78643K 129224 0 kqueue 12 18K 26K 78643K 546 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> 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 120 686 0 681 10 9 1 3 0 8 0 rtentry 112 574 0 491 4 0 4 4 0 8 0 unpcb 136 6758 0 6743 64 59 5 8 0 8 4 syncache 296 20 0 20 5 5 0 1 0 8 0 tcpqe 32 70 0 70 3 3 0 1 0 8 0 tcpcb 736 10211 0 10204 175 171 4 21 0 8 3 arp 120 85 0 69 1 0 1 1 0 8 0 inpcb 304 15942 0 15932 123 117 6 12 0 8 4 rttmr 72 18 0 18 6 6 0 1 0 8 0 nd6 48 156 0 134 1 0 1 1 0 8 0 pkpcb 40 32 0 32 6 6 0 1 0 8 0 kcovpl 48 38 0 30 1 0 1 1 0 8 0 ppxss 1248 25 0 25 5 5 0 1 0 8 0 pfstscr 40 11 0 11 3 3 0 1 0 8 0 pffrag 232 113 0 111 4 3 1 1 0 482 0 pffrnode 88 113 0 111 4 3 1 1 0 8 0 pffrent 40 371 0 369 4 3 1 1 0 8 0 pfosfp 40 1432 0 1008 5 0 5 5 0 8 0 pfosfpen 112 1432 0 717 21 0 21 21 0 8 0 pfrke_plain 168 26 0 20 4 3 1 1 0 8 0 pfrktable 1344 680 0 648 10 7 3 3 0 8 0 pftag 88 99 0 92 3 2 1 1 0 8 0 pfstitem 24 22 0 20 1 0 1 1 0 8 0 pfstkey 112 38 0 36 1 0 1 1 0 8 0 pfstate 320 28 0 26 2 1 1 2 0 8 0 pfrule 1360 599 0 437 17 3 14 14 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2868 0 2487 47 19 28 30 0 8 1 art_table 32 2869 0 2487 4 0 4 4 0 8 0 art_node 16 573 0 499 1 0 1 1 0 8 0 sysvmsgpl 40 63 0 23 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 895 0 885 1 0 1 1 0 8 0 shmpl 112 157 0 29 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 16612 0 15133 93 0 93 93 0 8 0 ffsino 272 16612 0 15133 99 0 99 99 0 8 0 nchpl 144 30831 0 29200 63 0 63 63 0 8 0 rtmask 32 40 0 37 4 3 1 1 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 108140 0 108140 3 2 1 2 0 8 1 percpumem 16 127 0 86 1 0 1 1 0 8 0 vcpupl 2048 60 0 0 8 0 8 8 0 8 0 vmpool 560 110 0 50 5 0 5 5 0 8 0 pfiaddrpl 120 358 0 179 8 2 6 6 0 8 0 scsiplug 72 15 0 15 5 5 0 1 0 8 0 scxspl 216 85810 0 85810 34 31 3 8 0 8 3 plimitpl 152 987 0 972 1 0 1 1 0 8 0 sigapl 424 11371 0 11305 8 0 8 8 0 8 0 futexpl 64 91029 0 91021 1 0 1 1 0 8 0 knotepl 120 322 0 0 10 2 8 9 0 8 0 kqueuepl 216 2272 0 2262 54 53 1 5 0 8 0 pipepl 336 2241 0 2212 55 43 12 13 0 8 9 fdescpl 496 11335 0 11305 5 1 4 5 0 8 0 filepl 152 76450 0 76201 112 94 18 19 0 8 7 lockfpl 104 2517 0 2513 5 4 1 2 0 8 0 lockfspl 48 820 0 817 1 0 1 1 0 8 0 sessionpl 144 55 0 38 1 0 1 1 0 8 0 pgrppl 48 102 0 85 1 0 1 1 0 8 0 ucredpl 96 10121 0 10109 1 0 1 1 0 8 0 zombiepl 144 11305 0 11304 1 0 1 1 0 8 0 processpl 1064 11371 0 11304 5 0 5 5 0 8 0 procpl 672 32371 0 32287 25 16 9 9 0 8 1 srpgc 96 35 0 35 7 7 0 1 0 8 0 sosppl 168 77 0 77 19 18 1 1 0 8 1 sockpl 480 23501 0 23471 371 343 28 33 0 8 23 mcl64k 65536 35 0 0 4 1 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 24 0 0 2 0 2 2 0 8 0 mcl8k 8192 18 0 0 3 0 3 3 0 8 0 mcl4k 4096 26 0 0 3 0 3 3 0 8 0 mcl2k2 2112 10 0 0 1 0 1 1 0 8 0 mcl2k 2048 204 0 0 18 0 18 18 0 8 0 mtagpl 96 1051 0 0 19 0 19 19 0 8 0 mbufpl 256 2253 0 0 134 0 134 134 0 8 0 bufpl 288 20623 0 14287 453 0 453 453 0 8 0 anonpl 24 3243232 0 3219018 329 162 167 172 0 186 13 amapchunkpl 152 355198 0 354259 97 55 42 51 0 158 4 amappl16 200 31997 0 31133 154 102 52 57 0 8 2 amappl15 192 1692 0 1686 1 0 1 1 0 8 0 amappl14 184 899 0 896 1 0 1 1 0 8 0 amappl13 176 2006 0 1999 1 0 1 1 0 8 0 amappl12 168 2687 0 2677 1 0 1 1 0 8 0 amappl11 160 1393 0 1377 1 0 1 1 0 8 0 amappl10 152 962 0 956 1 0 1 1 0 8 0 amappl9 144 1567 0 1559 1 0 1 1 0 8 0 amappl8 136 2886 0 2756 5 0 5 5 0 8 0 amappl7 128 1651 0 1638 1 0 1 1 0 8 0 amappl6 120 1396 0 1371 2 1 1 2 0 8 0 amappl5 112 8620 0 8597 1 0 1 1 0 8 0 amappl4 104 4040 0 4003 2 0 2 2 0 8 0 amappl3 96 5153 0 5136 1 0 1 1 0 8 0 amappl2 88 3979 0 3911 3 1 2 3 0 8 0 amappl1 80 206397 0 205789 21 7 14 19 0 8 0 amappl 88 141567 0 141237 8 0 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 72 159 0 29 3 0 3 3 0 8 0 uaddrrnd 24 11445 0 11355 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 11445 0 11355 1 0 1 1 0 8 0 vmmpekpl 168 86764 0 86692 4 0 4 4 0 8 0 vmmpepl 168 1040254 0 1037107 267 115 152 153 0 357 8 vmsppl 368 11444 0 11355 10 1 9 9 0 8 0 rwobjpl 56 257999 0 249913 132 17 115 117 0 8 0 pdppl 4096 22897 0 22770 615 486 129 129 0 8 2 pvpl 32 5431960 0 5406685 503 269 234 248 0 265 21 pmappl 248 11444 0 11355 6 0 6 6 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1747 0 728 30 0 30 30 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff8291fff0) 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+0xb sys/dev/kcov.c:144 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x1f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x16 kd_curproc sys/dev/kcov.c:574 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x16 sys/dev/kcov.c:148 __mp_lock(ffffffff82a3d2a0) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82a3d2a0) at __mp_lock+0x133 sys/kern/kern_lock.c:147 sleep_setup(ffff80002c781b70,ffff800021156000,120,ffffffff8256fa81,0) at sleep_setup+0xd3 sys/kern/kern_synch.c:370 rwsleep(ffff800021156000,ffffffff829a60a0,120,ffffffff8256fa81,0) at rwsleep+0xc0 sys/kern/kern_synch.c:311 futex_wait(204e4520fe0,23,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260 sys_futex(ffff800021156000,ffff80002c781d00,ffff80002c781d60) at sys_futex+0xf8 sys/kern/sys_futex.c:111 syscall(ffff80002c781dd0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002c781dd0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x205c31da670, count: 1 ddb{0}> trace x86_ipi_db(ffffffff8291fff0) 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+0xb sys/dev/kcov.c:144 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x1f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x16 kd_curproc sys/dev/kcov.c:574 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x16 sys/dev/kcov.c:148 __mp_lock(ffffffff82a3d2a0) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82a3d2a0) at __mp_lock+0x133 sys/kern/kern_lock.c:147 sleep_setup(ffff80002c781b70,ffff800021156000,120,ffffffff8256fa81,0) at sleep_setup+0xd3 sys/kern/kern_synch.c:370 rwsleep(ffff800021156000,ffffffff829a60a0,120,ffffffff8256fa81,0) at rwsleep+0xc0 sys/kern/kern_synch.c:311 futex_wait(204e4520fe0,23,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260 sys_futex(ffff800021156000,ffff80002c781d00,ffff80002c781d60) at sys_futex+0xf8 sys/kern/sys_futex.c:111 syscall(ffff80002c781dd0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002c781dd0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x205c31da670, count: -14 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff825739a5) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825e91ae,ffffffff82632dac,131,ffffffff825fdeb9) at __assert+0x25 sys/kern/subr_prf.c:161 tun_clone_destroy(ffff800000be9000) at tun_clone_destroy+0x278 sys/net/if_tun.c:305 if_clone_destroy(ffff80002c763820) at if_clone_destroy+0x132 sys/net/if.c:1218 soo_ioctl(fffffd8066324e50,80206979,ffff80002c763820,ffff8000ffff47e0) at soo_ioctl+0x26c sys_ioctl(ffff8000ffff47e0,ffff80002c763938,ffff80002c763990) at sys_ioctl+0x4a2 syscall(ffff80002c763a00) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002c763a00) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa55d0743410, count: 6 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff825739a5) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825e91ae,ffffffff82632dac,131,ffffffff825fdeb9) at __assert+0x25 sys/kern/subr_prf.c:161 tun_clone_destroy(ffff800000be9000) at tun_clone_destroy+0x278 sys/net/if_tun.c:305 if_clone_destroy(ffff80002c763820) at if_clone_destroy+0x132 sys/net/if.c:1218 soo_ioctl(fffffd8066324e50,80206979,ffff80002c763820,ffff8000ffff47e0) at soo_ioctl+0x26c sys_ioctl(ffff8000ffff47e0,ffff80002c763938,ffff80002c763990) at sys_ioctl+0x4a2 syscall(ffff80002c763a00) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002c763a00) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa55d0743410, count: -9