panic: kernel diagnostic assertion "refs != ~0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_synch.c", line 955 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 186991 34957 0 0x14000 0x200 0 softnet0 db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b15a5) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833efc90,ffffffff833fbc4b,3bb,ffffffff83425f89) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003c43a348,ffffffff833aa270) at refcnt_finalize+0x1db sys/kern/kern_synch.c:956 pppx_if_destroy(2a5b9a,ffff80003c43a340) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(2a5b9a,41,2000,ffff800036bdd4e8) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff800036fe30f0) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805fddc708,41,fffffd80097fd410,ffff800036bdd4e8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8061799050,ffff800036bdd4e8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8061799050,ffff800036bdd4e8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8061799050,ffff800036bdd4e8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8061799050,ffff800036bdd4e8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff800036bdd4e8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff800036bdd4e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800036bdd4e8,ffff800036fe3460,ffff800036fe33b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 end trace frame: 0xffff800036fe3450, count: 0 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 "refs != ~0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_synch.c", line 955 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b15a5) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833efc90,ffffffff833fbc4b,3bb,ffffffff83425f89) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003c43a348,ffffffff833aa270) at refcnt_finalize+0x1db sys/kern/kern_synch.c:956 pppx_if_destroy(2a5b9a,ffff80003c43a340) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(2a5b9a,41,2000,ffff800036bdd4e8) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff800036fe30f0) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805fddc708,41,fffffd80097fd410,ffff800036bdd4e8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8061799050,ffff800036bdd4e8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8061799050,ffff800036bdd4e8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8061799050,ffff800036bdd4e8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8061799050,ffff800036bdd4e8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff800036bdd4e8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff800036bdd4e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800036bdd4e8,ffff800036fe3460,ffff800036fe33b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800036fe3460) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800036fe3460) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x777b54ad3cf0, count: -16 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800036fe2ec0 rbx 0xffff8000299dee07 rdx 0 rcx 0xffff800036bdd4e8 rax 0xffff8000299ddff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xc6093ef8868e92a1 r11 0xcde1949ebceb6ce0 r12 0xffff8000299dec08 r13 0 r14 0 r15 0x1 rip 0xffffffff823db9d5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800036fe2eb0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=60522 pid=9782 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=80, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff800036bdd4e8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff800036bdcfb8,0xffff800036bdc038 process=0xffff80003c414020 user=0xffff800036fde000, vmspace=0xfffffd800f7f5208 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 14112 49973 45542 0 2 0 syz-executor 33756 435415 37112 0 3 0x80 nanoslp syz-executor 33756 213152 37112 0 3 0x4000000 smrbar syz-executor 33756 190976 37112 0 3 0x4000080 fsleep syz-executor 92806 332505 32727 0 3 0x80 nanoslp syz-executor 92806 29490 32727 0 3 0x4000080 kqread syz-executor 92806 456656 32727 0 3 0x4000080 fsleep syz-executor 37479 406346 71525 0 2 0 syz-executor 37479 375014 71525 0 3 0x4000080 fsleep syz-executor 37479 244452 71525 0 3 0x4000080 fsleep syz-executor 90935 425031 95689 0 3 0x80 nanoslp syz-executor 90935 129278 95689 0 3 0x4000000 tqbar syz-executor 90935 193020 95689 0 3 0x4000080 fsleep syz-executor 92491 438635 82483 0 2 0 syz-executor 92491 244416 82483 0 3 0x4000000 biowait syz-executor 92491 109260 82483 0 3 0x4000080 fsleep syz-executor 8912 323008 89214 0 3 0x3000 suspend syz-executor 8912 85259 89214 0 3 0x4081000 biowait syz-executor 45542 88459 35196 0 3 0x82 nanoslp syz-executor 32727 521533 35196 0 3 0x82 nanoslp syz-executor 95689 403908 35196 0 3 0x82 nanoslp syz-executor 71525 510914 35196 0 3 0x82 nanoslp syz-executor 82483 227084 35196 0 3 0x82 nanoslp syz-executor 37112 302476 35196 0 3 0x82 nanoslp syz-executor 65628 124328 35196 0 3 0x82 nanoslp syz-executor 89214 202617 35196 0 3 0x82 wait syz-executor 35196 237432 69246 0 3 0x82 kqread syz-executor 69246 165136 30715 0 3 0x10008a sigsusp ksh 30715 209432 83081 0 3 0x98 kqread sshd-session 83081 374480 39016 0 3 0x92 kqread sshd-session 51689 471631 1 0 3 0x100083 ttyopn getty 39016 425175 1 0 3 0x88 kqread sshd 35263 331774 93198 74 3 0x1100092 bpf pflogd 93198 232967 1 0 3 0x80 sbwait pflogd 7997 479327 79936 73 3 0x1100090 kqread syslogd 79936 215682 1 0 3 0x100082 sbwait syslogd 26386 426099 1 0 2 0x100000 resolvd 69333 46489 9290 77 3 0x100092 kqread dhcpleased 31791 433098 9290 77 2 0x100092 dhcpleased 9290 33007 1 0 3 0x80 kqread dhcpleased 82339 386938 0 0 3 0x14200 pause smr 84583 155658 0 0 2 0x14200 zerothread 28250 134679 0 0 3 0x14200 aiodoned aiodoned 65846 252676 0 0 3 0x14200 syncer update 16592 490569 0 0 3 0x14200 cleaner cleaner 78732 174392 0 0 3 0x14200 reaper reaper 59828 216228 0 0 3 0x14200 pgdaemon pagedaemon 75393 83769 0 0 3 0x14200 bored viomb 5919 123621 0 0 3 0x40014200 acpi0 acpi0 91666 332014 0 0 3 0x40014200 idle1 6342 123969 0 0 3 0x14200 bored softnet1 34957 186991 0 0 7 0x14200 softnet0 8490 186369 0 0 3 0x14200 bored systqmp 52827 246359 0 0 3 0x14200 bored systq 74435 269020 0 0 3 0x14200 tmoslp softclockmp 46200 491073 0 0 3 0x40014200 tmoslp softclock 69466 104346 0 0 3 0x40014200 idle0 1 312685 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 92491 (syz-executor) thread 0xffff8000fffeefa8 (244416) exclusive rrwlock inode r = 0 (0xfffffd806c913208) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 Process 8912 (syz-executor) thread 0xffff800036bd5a10 (85259) exclusive rrwlock inode r = 0 (0xfffffd806c9137d0) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 Process 34957 (softnet0) thread 0xffff8000ffffe000 (186991) exclusive rwlock inet46 r = 0 (0xffff8000015a94c8) #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 somove+0x15d5 pru_send sys/sys/protosw.h:-1 [inline] #2 somove+0x15d5 sys/kern/uipc_socket.c:1797 #3 sotask+0x8e sys/kern/uipc_socket.c:1491 #4 taskq_thread+0x157 sys/kern/kern_task.c:446 #5 proc_trampoline+0x10 exclusive rwlock sbufrcv r = 0 (0xffff8000015a9598) #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 sblock+0xb6 sys/kern/uipc_socket2.c:536 #3 sotask+0x36 sys/kern/uipc_socket.c:1489 #4 taskq_thread+0x157 sys/kern/kern_task.c:446 #5 proc_trampoline+0x10 shared rwlock softnet0 r = 0 (0xffff80000002c078) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11073 12088K 12351K 166960K 12343 0 pcb 17 12K 12K 166960K 43 0 rtable 257 9K 9K 166960K 385 0 pf 41 18K 19K 166960K 66 0 ifaddr 47 8K 8K 166960K 63 0 ifgroup 66 2K 2K 166960K 89 0 sysctl 3 1K 9K 166960K 7 0 counters 84 38K 38K 166960K 114 0 ioctlops 0 0K 4K 166960K 1579 0 iov 0 0K 16K 166960K 1 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1348 85K 85K 166960K 1498 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 6 0K 0K 166960K 7 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 89K 166960K 292 0 sigio 0 0K 0K 166960K 2 0 proc 72 115K 147K 166960K 543 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 17 0 in_multi 100 7K 7K 166960K 113 0 ether_multi 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 387 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 252 168K 180K 166960K 4560 0 UVM aobj 5 2K 2K 166960K 5 0 pinsyscall 43 86K 102K 166960K 1416 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 8 0 NDP 15 0K 2K 166960K 40 0 temp 46 8676K 8741K 166960K 8987 0 kqueue 15 24K 28K 166960K 58 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> 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 42 0 37 1 0 1 1 0 8 0 rtentry 176 116 0 3 6 0 6 6 0 8 0 unpcb 144 101 0 84 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpqe 32 2 0 2 1 0 1 1 0 8 1 tcpcb 736 108 0 100 7 0 7 7 0 8 6 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 240 0 228 7 0 7 7 0 8 5 nd6 152 26 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 18 0 12 1 0 1 1 0 8 0 pppxif 1504 4 0 2 1 0 1 1 0 8 0 pffrag 232 3 0 1 1 0 1 1 0 482 0 pffrnode 88 3 0 1 1 0 1 1 0 8 0 pffrent 40 4 0 2 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 pfrule 1360 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 477 0 6 30 0 30 30 0 8 0 art_table 40 478 0 6 5 0 5 5 0 8 0 art_node 32 116 0 13 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semapl 112 5 0 1 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1901 0 383 96 0 96 96 0 8 1 ffsino 296 1901 0 383 118 0 118 118 0 8 1 nchpl 144 2310 0 604 64 0 64 64 0 8 0 rtmask 32 5 0 4 1 0 1 1 0 8 0 vnodes 216 2054 0 0 115 0 115 115 0 8 0 namei 1024 7034 0 7034 2 0 2 2 0 8 2 percpumem 16 72 0 15 1 0 1 1 0 8 0 kstatmem 264 50 0 17 3 0 3 3 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 14318 0 14315 3 2 1 2 1 8 0 plimitpl 152 149 0 130 1 0 1 1 0 8 0 sigapl 424 601 0 553 7 1 6 7 0 8 0 knotepl 120 553 0 0 17 0 17 17 0 8 0 kqueuepl 224 83 0 68 1 0 1 1 0 8 0 pipepl 344 128 0 101 3 0 3 3 0 8 0 fdescpl 528 584 0 552 3 0 3 3 0 8 0 filepl 160 2459 0 2230 14 0 14 14 0 8 4 lockfpl 104 59 0 57 1 0 1 1 0 8 0 lockfspl 48 28 0 26 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 31 0 14 1 0 1 1 0 8 0 ucredpl 104 250 0 237 1 0 1 1 0 8 0 zombiepl 144 555 0 553 1 0 1 1 0 8 0 processpl 1232 601 0 553 5 0 5 5 0 8 0 procpl 664 908 0 849 6 0 6 6 0 8 0 sosppl 176 1 0 0 1 0 1 1 0 8 0 sockpl 752 387 0 352 11 0 11 11 0 8 7 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 1810 0 0 113 0 113 113 0 8 0 bufpl 280 6165 0 131 431 0 431 431 0 8 0 anonpl 32 9491 0 0 77 0 77 77 0 246 0 amapchunkpl 152 13554 0 12995 27 0 27 27 0 158 3 amappl16 200 2617 0 2278 20 1 19 19 0 8 0 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 3 0 3 1 1 0 1 0 8 0 amappl13 176 445 0 444 1 0 1 1 0 8 0 amappl12 168 950 0 908 3 0 3 3 0 8 0 amappl11 160 35 0 34 1 0 1 1 0 8 0 amappl10 152 73 0 59 1 0 1 1 0 8 0 amappl9 144 251 0 250 1 0 1 1 0 8 0 amappl8 136 34 0 32 1 0 1 1 0 8 0 amappl7 128 84 0 82 1 0 1 1 0 8 0 amappl6 120 276 0 263 1 0 1 1 0 8 0 amappl5 112 76 0 66 1 0 1 1 0 8 0 amappl4 104 433 0 403 1 0 1 1 0 8 0 amappl3 96 2228 0 2133 4 1 3 3 0 8 0 amappl2 88 691 0 616 2 0 2 2 0 8 0 amappl1 80 9571 0 8973 14 0 14 14 0 8 1 amappl 88 3801 0 3628 5 0 5 5 0 92 0 uvmvnodes 80 107 0 0 3 0 3 3 0 8 0 dma16384 16384 1 0 1 1 0 1 1 0 8 1 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 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 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 584 0 552 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 584 0 552 1 0 1 1 0 8 0 vmmpekpl 168 6586 0 6552 2 0 2 2 0 8 0 vmmpepl 168 45161 0 42882 103 1 102 102 0 357 0 vmsppl 488 583 0 552 5 0 5 5 0 8 1 rwobjpl 80 15759 0 14400 29 0 29 29 0 8 0 pdppl 4096 1176 0 1104 98 26 72 84 0 8 0 pvpl 32 17710 0 0 143 0 143 143 0 265 0 pmappl 256 583 0 552 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 380 0 28 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff838a3ff0) 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 __mp_lock(ffffffff83906d80) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83906d80) at __mp_lock+0x199 sys/kern/kern_lock.c:173 intr_handler(ffff80002a2109b0,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_cmp4(6,0) at __sanitizer_cov_trace_cmp4+0x35 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_cmp4(6,0) at __sanitizer_cov_trace_cmp4+0x35 sys/dev/kcov.c:206 rtable_loindex(0) at rtable_loindex+0x5c sys/net/rtable.c:329 ip_output(fffffd805f479700,0,fffffd806fa00300,0,0,fffffd806fa00398,6edf46b9516e4852) at ip_output+0x52a sys/netinet/ip_output.c:197 udp_output(fffffd806fa00290,fffffd805f479700,0,0) at udp_output+0x78f sys/netinet/udp_usrreq.c:1103 somove(ffff8000015a94a8,2) at somove+0x15f9 pru_send sys/sys/protosw.h:340 [inline] somove(ffff8000015a94a8,2) at somove+0x15f9 sys/kern/uipc_socket.c:1797 sotask(ffff8000015a94a8) at sotask+0x8e sys/kern/uipc_socket.c:1491 taskq_thread(ffff80000002c000) at taskq_thread+0x157 sys/kern/kern_task.c:446 end trace frame: 0x0, count: 2 ddb{0}> trace x86_ipi_db(ffffffff838a3ff0) 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 __mp_lock(ffffffff83906d80) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83906d80) at __mp_lock+0x199 sys/kern/kern_lock.c:173 intr_handler(ffff80002a2109b0,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_cmp4(6,0) at __sanitizer_cov_trace_cmp4+0x35 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_cmp4(6,0) at __sanitizer_cov_trace_cmp4+0x35 sys/dev/kcov.c:206 rtable_loindex(0) at rtable_loindex+0x5c sys/net/rtable.c:329 ip_output(fffffd805f479700,0,fffffd806fa00300,0,0,fffffd806fa00398,6edf46b9516e4852) at ip_output+0x52a sys/netinet/ip_output.c:197 udp_output(fffffd806fa00290,fffffd805f479700,0,0) at udp_output+0x78f sys/netinet/udp_usrreq.c:1103 somove(ffff8000015a94a8,2) at somove+0x15f9 pru_send sys/sys/protosw.h:340 [inline] somove(ffff8000015a94a8,2) at somove+0x15f9 sys/kern/uipc_socket.c:1797 sotask(ffff8000015a94a8) at sotask+0x8e sys/kern/uipc_socket.c:1491 taskq_thread(ffff80000002c000) at taskq_thread+0x157 sys/kern/kern_task.c:446 end trace frame: 0x0, count: -13 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b15a5) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833efc90,ffffffff833fbc4b,3bb,ffffffff83425f89) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003c43a348,ffffffff833aa270) at refcnt_finalize+0x1db sys/kern/kern_synch.c:956 pppx_if_destroy(2a5b9a,ffff80003c43a340) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(2a5b9a,41,2000,ffff800036bdd4e8) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff800036fe30f0) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805fddc708,41,fffffd80097fd410,ffff800036bdd4e8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8061799050,ffff800036bdd4e8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8061799050,ffff800036bdd4e8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8061799050,ffff800036bdd4e8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8061799050,ffff800036bdd4e8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff800036bdd4e8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff800036bdd4e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800036bdd4e8,ffff800036fe3460,ffff800036fe33b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 end trace frame: 0xffff800036fe3450, count: 0 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b15a5) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833efc90,ffffffff833fbc4b,3bb,ffffffff83425f89) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003c43a348,ffffffff833aa270) at refcnt_finalize+0x1db sys/kern/kern_synch.c:956 pppx_if_destroy(2a5b9a,ffff80003c43a340) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(2a5b9a,41,2000,ffff800036bdd4e8) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff800036fe30f0) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805fddc708,41,fffffd80097fd410,ffff800036bdd4e8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8061799050,ffff800036bdd4e8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8061799050,ffff800036bdd4e8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8061799050,ffff800036bdd4e8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8061799050,ffff800036bdd4e8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff800036bdd4e8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff800036bdd4e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800036bdd4e8,ffff800036fe3460,ffff800036fe33b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800036fe3460) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800036fe3460) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x777b54ad3cf0, count: -16