panic: broken type ref goroutine 24 [running]: github.com/google/syzkaller/prog.ArgCommon.Type(...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:39 github.com/google/syzkaller/prog.(*ConstArg).Size(0xc002a78150, 0xc002a78150) /syzkaller/gopath/src/github.com/google/syzkaller/prog/prog.go:59 +0xed github.com/google/syzkaller/prog.foreachArgImpl(0x9b0760, 0xc0024dc160, 0xc0024a3d68, 0xd35020, 0x7, 0x7, 0xc002a714d0, 0x200, 0x0, 0xc001d9f2e8) /syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:140 +0x2bb github.com/google/syzkaller/prog.foreachArgImpl(0x9b0760, 0xc0024dc060, 0xc0024a3d68, 0xd35020, 0x7, 0x7, 0xc002a714d0, 0x158, 0x0, 0xc001d9f2e8) /syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:139 +0x2a4 github.com/google/syzkaller/prog.foreachArgImpl(0x9b0760, 0xc0024a3d60, 0xc0024a3d28, 0xcc8a60, 0x4, 0x4, 0xc002a714d0, 0x10, 0x0, 0xc001d9f2e8) /syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:139 +0x2a4 github.com/google/syzkaller/prog.foreachArgImpl(0x9b0760, 0xc0024a3d20, 0xc002a77348, 0xcbf6a0, 0x3, 0x3, 0xc002a714d0, 0x0, 0x0, 0xc001d9f2e8) /syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:139 +0x2a4 github.com/google/syzkaller/prog.foreachArgImpl(0x9b07a0, 0xc002a714d0, 0xc002a77348, 0xcbf6a0, 0x3, 0x3, 0x0, 0x0, 0x0, 0xc001d9f2e8) /syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:154 +0x646 github.com/google/syzkaller/prog.ForeachArg(0xc002a77340, 0xc001d9f2e8) /syzkaller/gopath/src/github.com/google/syzkaller/prog/analysis.go:122 +0x112 github.com/google/syzkaller/prog.getCompatibleResources(0xc002a77300, 0x8fe62f, 0xb, 0xc00267fba0, 0x0, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:898 +0xb9 github.com/google/syzkaller/prog.(*randGen).resourceCentric(0xc00267fba0, 0xc0000899a0, 0xca88e0, 0x0, 0x897400, 0x1, 0xc001ef7720, 0xc001d9f4f0, 0x792919) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:846 +0xfe github.com/google/syzkaller/prog.(*ResourceType).generate(0xca88e0, 0xc00267fba0, 0xc0000899a0, 0x0, 0x9b06e0, 0xc001ef7720, 0x0, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:675 +0x27c github.com/google/syzkaller/prog.(*randGen).generateArgImpl(0xc00267fba0, 0xc0000899a0, 0x9b6a80, 0xca88e0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:664 +0x450 github.com/google/syzkaller/prog.(*randGen).generateArg(...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:614 github.com/google/syzkaller/prog.(*randGen).generateArgs(0xc00267fba0, 0xc0000899a0, 0xd36f80, 0xc, 0xc, 0xaaaaaaaaaaaaaa00, 0x38, 0x8, 0x7, 0x8, ...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:602 +0x116 github.com/google/syzkaller/prog.(*StructType).generate(0xcb1fa0, 0xc00267fba0, 0xc0000899a0, 0x0, 0xd6efe0, 0x40be26, 0xc001c8e600, 0x20, 0x20) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:786 +0x7c github.com/google/syzkaller/prog.(*randGen).generateArgImpl(0xc00267fba0, 0xc0000899a0, 0x9b6b40, 0xcb1fa0, 0x760000, 0x0, 0x0, 0x0, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:664 +0x450 github.com/google/syzkaller/prog.(*randGen).generateArg(...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:614 github.com/google/syzkaller/prog.(*randGen).generateArgs(0xc00267fba0, 0xc0000899a0, 0xcb2120, 0x2, 0x2, 0x0, 0x0, 0x0, 0x0, 0x0, ...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:602 +0x116 github.com/google/syzkaller/prog.(*StructType).generate(0xcb20e0, 0xc00267fba0, 0xc0000899a0, 0x0, 0xd6efe0, 0x78b7c1, 0xc00267f8c0, 0x32, 0x2) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:786 +0x7c github.com/google/syzkaller/prog.(*randGen).generateArgImpl(0xc00267fba0, 0xc0000899a0, 0x9b6b40, 0xcb20e0, 0xd60000, 0x0, 0x0, 0x0, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:664 +0x450 github.com/google/syzkaller/prog.(*randGen).generateArg(...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:614 github.com/google/syzkaller/prog.(*UnionType).mutate(0xcab520, 0xc00267fba0, 0xc0000899a0, 0x9b0820, 0xc00267fa40, 0xc00267f908, 0xcb0f20, 0x2, 0x2, 0xc001820420, ...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:474 +0x178 github.com/google/syzkaller/prog.(*Target).mutateArg(0xc0000e0000, 0xc00267fba0, 0xc0000899a0, 0x9b0820, 0xc00267fa40, 0xc00267f908, 0xcb0f20, 0x2, 0x2, 0xc001820420, ...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:246 +0xe3 github.com/google/syzkaller/prog.(*mutator).mutateArg(0xc001d9fec0, 0xa) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:183 +0x322 github.com/google/syzkaller/prog.(*Prog).Mutate(0xc001c04d00, 0x9a9c20, 0xc001820f60, 0x14, 0xc0017e6f80, 0xc002276000, 0x2070, 0x2400) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:47 +0x32c main.(*Proc).loop(0xc0017e6fc0) /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:95 +0x434 created by main.main /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:258 +0x1155 OpenBSD/amd64 (ci-openbsd-multicore-1.c.syzkaller.internal) (tty00) login: uvm_fault(0xfffffd807f000cf0, 0x20b, 0, 1) -> e kernel: page fault trap, code=0 Stopped at in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic kernel page fault uvm_fault(0xfffffd807f000cf0, 0x20b, 0, 1) -> e in_delmulti(1ff) at in_delmulti+0x8d sys/netinet/in.c:914 end trace frame: 0xffff800020f6abf0, count: 0 ddb{0}> trace in_delmulti(1ff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000a43300) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff8000009d6000) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff8000009d6000) at if_detach+0x140 sys/net/if.c:1149 tun_clone_destroy(ffff8000009d6000) at tun_clone_destroy+0x1f2 sys/net/if_tun.c:329 tun_dev_close(5d00,7) at tun_dev_close+0x160 sys/net/if_tun.c:480 spec_close(ffff800020f6add0) at spec_close+0x311 sys/kern/spec_vnops.c:555 VOP_CLOSE(fffffd806e36f4e8,7,fffffd807f7bf780,ffff800020e6dd48) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd80670a9570,ffff800020e6dd48) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80670a9570,ffff800020e6dd48) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80670a9570,ffff800020e6dd48) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80670a9570,ffff800020e6dd48) at closef+0x11c sys/kern/kern_descrip.c:1260 fdfree(ffff800020e6dd48) at fdfree+0x101 sys/kern/kern_descrip.c:1192 exit1(ffff800020e6dd48,0,d,1) at exit1+0x32c sys/kern/kern_exit.c:197 postsig(ffff800020e6dd48,d) at postsig+0x4ed sigexit sys/kern/kern_sig.c:1483 [inline] postsig(ffff800020e6dd48,d) at postsig+0x4ed sys/kern/kern_sig.c:1415 userret(ffff800020e6dd48) at userret+0x199 sys/kern/kern_sig.c:1867 syscall(ffff800020f6b250) at syscall+0x55f mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff800020f6b250) at syscall+0x55f sys/arch/amd64/amd64/trap.c:592 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff77b0, count: -17 ddb{0}> show registers rdi 0x2 rsi 0 rbp 0xffff800020f6aba0 rbx 0 rdx 0xffff800020e6dd48 rcx 0 rax 0 r8 0xffffffff8189d363 rt_ifa_purge+0x153 r9 0x5 r10 0x2f r11 0x6934d6d1a2809417 r12 0 r13 0x3 r14 0x1ff r15 0x1 rip 0xffffffff81806b4d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800020f6ab40 ss 0x10 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb{0}> show proc PROC (syz-executor.0) pid=61864 stat=onproc flags process=a proc=2000 pri=32, usrpri=77, nice=20 forw=0xffffffffffffffff, list=0xffff800020ed0c40,0xffff800020ec6778 process=0xffff800020e803e8 user=0xffff800020f66000, vmspace=0xfffffd807f000cf0 estcpu=36, cpticks=2, pctcpu=0.14 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 17799 318900 0 0 3 0x14200 bored sosplice 86195 442598 51971 0 3 0x10008a pause ksh 51971 138374 53393 0 3 0x92 select sshd 49760 264584 1 0 3 0x100083 ttyin getty 53393 93157 1 0 3 0x80 select sshd 68335 440673 5567 74 3 0x100092 bpf pflogd 5567 239893 1 0 3 0x80 netio pflogd 68000 169206 78261 73 3 0x100090 kqread syslogd 78261 85728 1 0 3 0x100082 netio syslogd 52826 511488 1 77 2 0x100090 dhclient 45295 434679 1 0 3 0x80 poll dhclient 19650 49631 0 0 3 0x14200 bored smr 70157 448869 0 0 2 0x14200 zerothread 35588 438014 0 0 3 0x14200 aiodoned aiodoned 65007 377486 0 0 3 0x14200 syncer update 65522 498621 0 0 3 0x14200 cleaner cleaner 81993 168474 0 0 7 0x14200 reaper 89632 305932 0 0 3 0x14200 pgdaemon pagedaemon 85407 20899 0 0 3 0x14200 bored crynlk 84012 213567 0 0 3 0x14200 bored crypto 59046 19260 0 0 3 0x40014200 acpi0 acpi0 21858 45048 0 0 3 0x40014200 idle1 20417 231858 0 0 3 0x14200 bored softnet 63469 329929 0 0 2 0x14200 systqmp 45131 89504 0 0 3 0x14200 bored systq 90308 11833 0 0 3 0x40014200 bored softclock 14766 252816 0 0 3 0x40014200 idle0 1 394291 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9505 6418K 6932K 78643K 11382 0 pcb 13 8K 8K 78643K 102 0 rtable 90 3K 4K 78643K 290 0 ifaddr 79 17K 17K 78643K 117 0 counters 43 33K 34K 78643K 51 0 ioctlops 0 0K 4K 78643K 1496 0 iov 0 0K 32K 78643K 57 0 mount 1 1K 1K 78643K 1 0 vnodes 1226 77K 77K 78643K 1498 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 7 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 71 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 3 8K 25K 78643K 444 0 sigio 0 0K 0K 78643K 17 0 proc 61 63K 95K 78643K 483 0 subproc 14 0K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 35 0 in_multi 86 3K 3K 78643K 148 0 ether_multi 1 0K 0K 78643K 17 0 mrt 0 0K 0K 78643K 10 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 0 exec 0 0K 1K 78643K 264 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 71 36K 48K 78643K 2450 0 UVM aobj 9 2K 2K 78643K 10 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 64 0 NDP 10 0K 0K 78643K 22 0 temp 108 3042K 3106K 78643K 4492 0 kqueue 2 2K 8K 78643K 13 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 arp 64 7 0 2 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 40 0 38 1 0 1 1 0 8 0 rtentry 112 67 0 32 2 0 2 2 0 8 0 unpcb 120 170 0 160 1 0 1 1 0 8 0 syncache 264 11 0 11 4 3 1 1 0 8 1 tcpqe 32 3 0 3 2 1 1 1 0 8 1 tcpcb 544 367 0 362 1 0 1 1 0 8 0 inpcb 280 741 0 733 3 1 2 2 0 8 1 rttmr 72 4 0 4 2 1 1 1 0 8 1 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 40 3 0 3 1 1 0 1 0 8 0 nd6 48 11 0 9 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 1 0 1 0 8 0 ppxss 1128 1 0 1 1 1 0 1 0 8 0 pffrag 232 2 0 2 1 1 0 1 0 482 0 pffrnode 88 2 0 2 1 1 0 1 0 8 0 pffrent 40 50 0 50 2 1 1 1 0 8 1 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 47 0 12 1 0 1 1 0 8 0 pfstkey 112 47 0 12 2 0 2 2 0 8 0 pfstate 328 47 0 12 3 0 3 3 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 305 0 143 13 2 11 13 0 8 0 art_table 32 306 0 143 2 0 2 2 0 8 0 art_node 16 66 0 29 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 0 1 0 1 1 0 8 0 semapl 112 65 0 55 1 0 1 1 0 8 0 shmpl 112 8 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2056 0 656 89 0 89 89 0 8 0 ffsino 272 2056 0 656 94 0 94 94 0 8 0 nchpl 144 2849 0 1253 60 0 60 60 0 8 0 uvmvnodes 72 2286 0 0 42 0 42 42 0 8 0 vnodes 208 2286 0 0 121 0 121 121 0 8 0 namei 1024 7919 0 7919 1 0 1 1 0 8 1 percpumem 16 36 0 4 1 0 1 1 0 8 0 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 560 5 0 3 2 1 1 1 0 8 0 scxspl 192 8800 0 8800 10 7 3 7 0 8 3 plimitpl 152 40 0 32 1 0 1 1 0 8 0 sigapl 424 660 0 630 4 0 4 4 0 8 0 futexpl 56 7802 0 7802 1 0 1 1 0 8 1 knotepl 112 74 0 69 1 0 1 1 0 8 0 kqueuepl 144 100 0 99 1 0 1 1 0 8 0 pipelkpl 48 152 0 144 1 0 1 1 0 8 0 pipepl 120 304 0 293 1 0 1 1 0 8 0 fdescpl 496 644 0 630 3 0 3 3 0 8 0 filepl 152 3989 0 3921 5 0 5 5 0 8 1 lockfpl 104 106 0 105 1 0 1 1 0 8 0 lockfspl 48 40 0 39 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 28 0 17 1 0 1 1 0 8 0 ucredpl 96 438 0 429 1 0 1 1 0 8 0 zombiepl 144 632 0 629 1 0 1 1 0 8 0 processpl 984 660 0 629 5 0 5 5 0 8 0 procpl 624 1654 0 1623 4 0 4 4 0 8 0 sosppl 128 11 0 11 2 1 1 1 0 8 1 sockpl 400 952 0 932 6 2 4 4 0 8 1 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 10 0 0 2 0 2 2 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 161 0 0 20 0 20 20 0 8 1 mtagpl 80 42 0 0 1 0 1 1 0 8 0 mbufpl 256 277 0 0 15 0 15 15 0 8 0 bufpl 280 4339 0 139 300 0 300 300 0 8 0 anonpl 16 74737 0 73430 81 7 74 74 0 124 55 amapchunkpl 152 4395 0 4356 22 2 20 20 0 158 17 amappl16 192 3232 0 3214 60 21 39 50 0 8 31 amappl15 184 2 0 1 1 0 1 1 0 8 0 amappl14 176 32 0 28 1 0 1 1 0 8 0 amappl13 168 36 0 34 1 0 1 1 0 8 0 amappl12 160 8 0 6 2 1 1 1 0 8 0 amappl11 152 56 0 41 1 0 1 1 0 8 0 amappl10 144 216 0 212 1 0 1 1 0 8 0 amappl9 136 597 0 595 1 0 1 1 0 8 0 amappl8 128 562 0 561 2 0 2 2 0 8 1 amappl7 120 313 0 305 1 0 1 1 0 8 0 amappl6 112 23 0 23 1 0 1 1 0 8 1 amappl5 104 549 0 532 1 0 1 1 0 8 0 amappl4 96 491 0 468 1 0 1 1 0 8 0 amappl3 88 110 0 105 1 0 1 1 0 8 0 amappl2 80 4226 0 4168 2 0 2 2 0 8 0 amappl1 72 23817 0 23390 23 13 10 18 0 8 0 amappl 80 1913 0 1888 2 0 2 2 0 84 0 dma4096 4096 1 0 1 1 1 0 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 64 9 0 1 1 0 1 1 0 8 0 uaddrrnd 24 649 0 633 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 649 0 633 1 0 1 1 0 8 0 vmmpekpl 168 8889 0 8857 2 0 2 2 0 8 0 vmmpepl 168 86023 0 85066 119 19 100 105 0 357 44 vmsppl 368 648 0 632 2 0 2 2 0 8 0 pdppl 4096 1306 0 1266 6 0 6 6 0 8 0 pvpl 32 243419 0 240280 184 6 178 178 0 265 119 pmappl 232 648 0 632 3 1 2 2 0 8 1 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 264 0 7 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace in_delmulti(1ff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000a43300) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff8000009d6000) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff8000009d6000) at if_detach+0x140 sys/net/if.c:1149 tun_clone_destroy(ffff8000009d6000) at tun_clone_destroy+0x1f2 sys/net/if_tun.c:329 tun_dev_close(5d00,7) at tun_dev_close+0x160 sys/net/if_tun.c:480 spec_close(ffff800020f6add0) at spec_close+0x311 sys/kern/spec_vnops.c:555 VOP_CLOSE(fffffd806e36f4e8,7,fffffd807f7bf780,ffff800020e6dd48) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd80670a9570,ffff800020e6dd48) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80670a9570,ffff800020e6dd48) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80670a9570,ffff800020e6dd48) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80670a9570,ffff800020e6dd48) at closef+0x11c sys/kern/kern_descrip.c:1260 fdfree(ffff800020e6dd48) at fdfree+0x101 sys/kern/kern_descrip.c:1192 exit1(ffff800020e6dd48,0,d,1) at exit1+0x32c sys/kern/kern_exit.c:197 postsig(ffff800020e6dd48,d) at postsig+0x4ed sigexit sys/kern/kern_sig.c:1483 [inline] postsig(ffff800020e6dd48,d) at postsig+0x4ed sys/kern/kern_sig.c:1415 userret(ffff800020e6dd48) at userret+0x199 sys/kern/kern_sig.c:1867 syscall(ffff800020f6b250) at syscall+0x55f mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff800020f6b250) at syscall+0x55f sys/arch/amd64/amd64/trap.c:592 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff77b0, count: -17 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __sanitizer_cov_trace_cmp4(ffffffff82667c28,ffffffff82667c28) at __sanitizer_cov_trace_cmp4+0xb sys/dev/kcov.c:169 uvm_map_teardown(fffffd806e94a738) at uvm_map_teardown+0x261 sys/uvm/uvm_map.c:2759 uvmspace_free(fffffd806e94a738) at uvmspace_free+0x86 sys/uvm/uvm_map.c:3646 uvm_exit(ffff800020ec9728) at uvm_exit+0x29 sys/uvm/uvm_glue.c:297 reaper(ffff800020e19380) at reaper+0x189 sys/kern/kern_exit.c:456 end trace frame: 0x0, count: -8