uvm_fault(0xfffffd80702ae010, 0x4, 0, 1) -> e kernel: page fault trap, code=0 Stopped at igmp_leavegroup+0x80: movl 0x4(%rax),%r12d TID PID UID PRFLAGS PFLAGS CPU COMMAND 418448 93291 0 0x2 0 0 syz-executor.1 igmp_leavegroup(ffff800000bd8fc0) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000bd8fc0) at in_delmulti+0xb7 sys/netinet/in.c:917 ip_freemoptions(ffff800000c249a0) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd806f67a260) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:580 rip_detach(fffffd8070b4e048) at rip_detach+0x6a sys/netinet/raw_ip.c:616 soclose(fffffd8070b4e048,0) at soclose+0x255 sys/kern/uipc_socket.c:351 soo_close(fffffd8066c96e50,ffff80002e460000) at soo_close+0x40 fdrop(fffffd8066c96e50,ffff80002e460000) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd8066c96e50,ffff80002e460000) at closef+0x11c sys/kern/kern_descrip.c:1263 fdfree(ffff80002e460000) at fdfree+0xf4 sys/kern/kern_descrip.c:1195 exit1(ffff80002e460000,0,0,3) at exit1+0x37d sys/kern/kern_exit.c:202 single_thread_check_locked(ffff80002e460000,0,0) at single_thread_check_locked+0x227 sys/kern/kern_sig.c:1963 userret(ffff80002e460000) at userret+0x27a single_thread_check sys/kern/kern_sig.c:2004 [inline] userret(ffff80002e460000) at userret+0x27a sys/kern/kern_sig.c:1951 syscall(ffff80002929f460) at syscall+0x57e mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff80002929f460) at syscall+0x57e sys/arch/amd64/amd64/trap.c:607 end trace frame: 0xffff80002929f4e0, 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: uvm_fault(0xfffffd80702ae010, 0x4, 0, 1) -> e ddb{1}> trace igmp_leavegroup(ffff800000bd8fc0) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000bd8fc0) at in_delmulti+0xb7 sys/netinet/in.c:917 ip_freemoptions(ffff800000c249a0) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd806f67a260) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:580 rip_detach(fffffd8070b4e048) at rip_detach+0x6a sys/netinet/raw_ip.c:616 soclose(fffffd8070b4e048,0) at soclose+0x255 sys/kern/uipc_socket.c:351 soo_close(fffffd8066c96e50,ffff80002e460000) at soo_close+0x40 fdrop(fffffd8066c96e50,ffff80002e460000) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd8066c96e50,ffff80002e460000) at closef+0x11c sys/kern/kern_descrip.c:1263 fdfree(ffff80002e460000) at fdfree+0xf4 sys/kern/kern_descrip.c:1195 exit1(ffff80002e460000,0,0,3) at exit1+0x37d sys/kern/kern_exit.c:202 single_thread_check_locked(ffff80002e460000,0,0) at single_thread_check_locked+0x227 sys/kern/kern_sig.c:1963 userret(ffff80002e460000) at userret+0x27a single_thread_check sys/kern/kern_sig.c:2004 [inline] userret(ffff80002e460000) at userret+0x27a sys/kern/kern_sig.c:1951 syscall(ffff80002929f460) at syscall+0x57e mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff80002929f460) at syscall+0x57e sys/arch/amd64/amd64/trap.c:607 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd8750, count: -15 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002929ef50 rbx 0 rdx 0 rcx 0x1 rax 0 r8 0 r9 0x1 r10 0xe95b5d1b637780a0 r11 0x5d2297317fc12c51 r12 0 r13 0x3 r14 0xffff800000689000 r15 0xffff800000bd8fc0 rip 0xffffffff816a3200 igmp_leavegroup+0x80 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002929ef20 ss 0x10 igmp_leavegroup+0x80: movl 0x4(%rax),%r12d ddb{1}> show proc PROC (syz-executor.3) pid=369051 stat=onproc flags process=1008 proc=82000 pri=32, usrpri=85, nice=20 forw=0xffffffffffffffff, list=0xffff8000267197b0,0xffff800026718020 process=0xffff80002671e158 user=0xffff80002929a000, vmspace=0xfffffd80702ae010 estcpu=35, cpticks=2, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 98776 298225 97864 0 2 0 syz-executor.7 96240 89041 31081 0 2 0x10 syz-executor.6 96240 484719 31081 0 3 0x4000090 fsleep syz-executor.6 96240 318359 31081 0 3 0x4000090 fsleep syz-executor.6 72874 322731 76338 0 2 0 syz-executor.4 72874 11134 76338 0 3 0x4000080 kqsel syz-executor.4 93291 418448 44083 0 7 0x2 syz-executor.1 82546 510957 0 0 3 0x14200 acct acct 18181 453931 1 0 3 0x100083 ttyin getty 76338 89828 44083 0 3 0x82 nanoslp syz-executor.4 39252 519519 44083 0 2 0x2 syz-executor.2 48353 39103 44083 0 2 0x2 syz-executor.3 31081 187407 44083 0 3 0x82 nanoslp syz-executor.6 32685 288871 44083 0 2 0x2 syz-executor.5 11111 129087 44083 0 2 0x2 syz-executor.0 97864 272978 44083 0 3 0x82 nanoslp syz-executor.7 81491 184314 0 0 3 0x14280 nfsidl nfsio 96380 8055 0 0 3 0x14280 nfsidl nfsio 42972 100111 0 0 3 0x14280 nfsidl nfsio 43456 515652 0 0 3 0x14280 nfsidl nfsio 75038 432084 0 0 3 0x14280 nfsidl nfsio 41739 286914 0 0 3 0x14280 nfsidl nfsio 62004 90875 0 0 3 0x14280 nfsidl nfsio 2779 281980 0 0 3 0x14280 nfsidl nfsio 32097 233917 0 0 3 0x14280 nfsidl nfsio 15529 426086 0 0 3 0x14280 nfsidl nfsio 22094 12917 0 0 3 0x14280 nfsidl nfsio 47900 357912 0 0 3 0x14280 nfsidl nfsio 45403 205555 0 0 3 0x14280 nfsidl nfsio 90935 307452 0 0 3 0x14280 nfsidl nfsio 23697 176085 0 0 3 0x14280 nfsidl nfsio 13104 134179 0 0 3 0x14280 nfsidl nfsio 82940 510376 0 0 3 0x14280 nfsidl nfsio 46881 177269 0 0 3 0x14280 nfsidl nfsio 85301 208109 0 0 3 0x14280 nfsidl nfsio 3233 6373 0 0 3 0x14280 nfsidl nfsio 37230 228016 0 0 3 0x14200 bored sosplice 44083 36621 13491 0 3 0x82 thrsleep syz-fuzzer 44083 38457 13491 0 3 0x4000082 nanoslp syz-fuzzer 44083 508440 13491 0 3 0x4000082 thrsleep syz-fuzzer 44083 381075 13491 0 3 0x4000082 thrsleep syz-fuzzer 44083 249072 13491 0 2 0x4000002 syz-fuzzer 44083 509468 13491 0 3 0x4000082 thrsleep syz-fuzzer 44083 307812 13491 0 3 0x4000082 thrsleep syz-fuzzer 44083 261825 13491 0 3 0x4000082 thrsleep syz-fuzzer 44083 131515 13491 0 2 0x4000002 syz-fuzzer 13491 299202 81695 0 3 0x10008a sigsusp ksh 81695 191960 66525 0 3 0x9a kqread sshd 66525 149364 1 0 3 0x88 kqread sshd 41568 154221 87404 74 3 0x1100092 bpf pflogd 87404 303565 1 0 3 0x80 netio pflogd 44415 217083 69076 73 3 0x1100090 kqread syslogd 69076 513573 1 0 3 0x100082 netio syslogd 2988 495344 1 0 3 0x100080 kqread resolvd 5286 132370 49626 77 3 0x100092 kqread dhcpleased 89047 6765 49626 77 3 0x100092 kqread dhcpleased 49626 464577 1 0 3 0x80 kqread dhcpleased 32026 64473 0 0 3 0x14200 bored smr 47723 136702 0 0 2 0x14200 zerothread 80784 98434 0 0 3 0x14200 aiodoned aiodoned 66429 203672 0 0 3 0x14200 syncer update 50331 243916 0 0 3 0x14200 cleaner cleaner 54696 199464 0 0 3 0x14200 reaper reaper 30438 338917 0 0 3 0x14200 pgdaemon pagedaemon 54282 25587 0 0 3 0x14200 bored viomb 34066 275987 0 0 3 0x40014200 acpi0 acpi0 62183 448776 0 0 3 0x40014200 idle1 59948 444008 0 0 3 0x14200 bored softnet 28465 69586 0 0 3 0x14200 bored systqmp 97982 300580 0 0 3 0x14200 bored systq 74579 391769 0 0 3 0x40014200 bored softclock 75932 67450 0 0 3 0x40014200 idle0 1 365738 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 93291 (syz-executor.1) thread 0xffff8000267197b0 (418448) exclusive rrwlock inode r = 0 (0xfffffd805be12c58) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vget+0x1d3 sys/kern/vfs_subr.c:677 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1318 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 #11 namei+0x36a sys/kern/vfs_lookup.c:245 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1850 #13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd805be125f8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413 #6 namei+0x36a sys/kern/vfs_lookup.c:245 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1850 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10238 6644K 10681K 78643K 39587 0 pcb 13 16K 18K 78643K 3086 0 rtable 191 15K 17K 78643K 3482 0 ifaddr 89 24K 28K 78643K 1448 0 sysctl 3 1K 1K 78643K 3 0 counters 56 35K 36K 78643K 550 0 ioctlops 0 0K 8K 78643K 6453 0 iov 0 0K 20K 78643K 1925 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1397 87K 88K 78643K 10955 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 151 0 VM map 2 1K 1K 78643K 2 0 sem 10 0K 0K 78643K 10 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 14 49K 89K 78643K 20056 0 sigio 1 0K 0K 78643K 238 0 proc 72 87K 112K 78643K 2926 0 subproc 104 6K 6K 78643K 832 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 2 0K 0K 78643K 1102 0 in_multi 75 5K 6K 78643K 1274 0 ether_multi 1 0K 0K 78643K 159 0 mrt 1 0K 0K 78643K 54 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 241 1076K 1076K 78643K 241 0 exec 0 0K 2K 78643K 4416 0 pfkey data 0 0K 0K 78643K 8 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 671 1368K 1374K 78643K 258194 0 UVM aobj 131 8K 8K 78643K 144 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 962 0 NDP 14 0K 1K 78643K 415 0 temp 142 4711K 4839K 78643K 236978 0 kqueue 12 18K 26K 78643K 993 0 SYN cache 2 0K 16K 78643K 4 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 1071 0 1068 14 13 1 5 0 8 0 rtentry 112 1042 0 962 6 3 3 4 0 8 0 unpcb 136 11845 0 11828 140 139 1 14 0 8 0 syncache 296 47 0 47 20 20 0 1 0 8 0 tcpcb 736 7230 0 7217 239 237 2 14 0 8 0 arp 120 155 0 141 1 0 1 1 0 8 0 inpcb 304 17238 0 17225 303 296 7 14 0 8 5 rttmr 72 14 0 14 5 5 0 1 0 8 0 ip6q 72 6 0 6 2 2 0 1 0 8 0 ip6af 40 12 0 12 2 2 0 1 0 8 0 nd6 48 233 0 213 1 0 1 1 0 8 0 pkpcb 40 106 0 106 14 14 0 1 0 8 0 kcovpl 48 64 0 56 1 0 1 1 0 8 0 ppxss 1248 106 0 106 21 21 0 1 0 8 0 pffrag 232 110 0 108 17 16 1 1 0 482 0 pffrnode 88 108 0 106 17 16 1 1 0 8 0 pffrent 40 649 0 647 17 16 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 pfrktable 1344 99 0 98 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 43 0 41 1 0 1 1 0 8 0 pfstkey 112 43 0 41 1 0 1 1 0 8 0 pfstate 320 43 0 41 2 1 1 2 0 8 0 pfrule 1360 54 0 45 2 1 1 2 0 8 0 art_heap8 4096 3 0 2 3 2 1 2 0 8 0 art_heap4 256 4470 0 4113 62 36 26 30 0 8 0 art_table 32 4473 0 4115 5 1 4 4 0 8 0 art_node 16 994 0 925 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 6 2 1 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 8 0 0 1 0 1 1 0 8 0 shmpl 112 141 0 13 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 27553 0 26037 96 0 96 96 0 8 0 ffsino 272 27553 0 26037 102 0 102 102 0 8 0 nchpl 144 54142 0 52521 63 0 63 63 0 8 0 uvmvnodes 80 8965 0 0 183 0 183 183 0 8 0 vnodes 224 8965 0 0 528 0 528 528 0 8 0 namei 1024 210272 0 210272 10 9 1 2 0 8 1 percpumem 16 287 0 247 1 0 1 1 0 8 0 vcpupl 2048 290 0 0 37 0 37 37 0 8 0 vmpool 560 329 0 39 21 0 21 21 0 8 0 pfiaddrpl 120 28 0 28 2 2 0 1 0 8 0 scsiplug 72 16 0 16 7 7 0 1 0 8 0 scxspl 216 196305 0 196305 58 57 1 8 0 8 1 plimitpl 152 2726 0 2711 1 0 1 1 0 8 0 sigapl 424 20288 0 20225 8 0 8 8 0 8 0 futexpl 64 184234 0 184232 13 12 1 1 0 8 0 knotepl 120 960 0 0 18 5 13 18 0 8 0 kqueuepl 216 4231 0 4222 87 86 1 5 0 8 0 pipepl 336 4817 0 4789 128 125 3 13 0 8 0 fdescpl 496 20237 0 20210 6 2 4 5 0 8 0 filepl 152 149119 0 148870 278 264 14 24 0 8 3 lockfpl 104 5275 0 5272 11 10 1 2 0 8 0 lockfspl 48 1535 0 1532 1 0 1 1 0 8 0 sessionpl 144 87 0 70 1 0 1 1 0 8 0 pgrppl 48 351 0 334 1 0 1 1 0 8 0 ucredpl 96 13922 0 13906 1 0 1 1 0 8 0 zombiepl 144 20226 0 20225 2 1 1 1 0 8 0 processpl 1064 20288 0 20225 5 0 5 5 0 8 0 procpl 672 59984 0 59910 41 33 8 9 0 8 0 srpgc 96 46 0 46 19 19 0 1 0 8 0 sosppl 168 106 0 105 13 12 1 1 0 8 0 sockpl 480 30352 0 30319 770 757 13 51 0 8 8 mcl64k 65536 122 0 0 12 1 11 12 0 8 0 mcl16k 16384 34 0 0 5 2 3 3 0 8 1 mcl12k 12288 57 0 0 2 0 2 2 0 8 0 mcl9k 9216 41 0 0 2 0 2 2 0 8 0 mcl8k 8192 61 0 0 4 1 3 3 0 8 0 mcl4k 4096 43 0 0 4 2 2 3 0 8 0 mcl2k2 2112 9 0 0 1 0 1 1 0 8 0 mcl2k 2048 1080 0 0 83 4 79 80 0 8 0 mtagpl 96 1142 0 0 12 1 11 12 0 8 0 mbufpl 256 3454 0 0 147 0 147 147 0 8 0 bufpl 288 36443 0 27469 642 0 642 642 0 8 0 anonpl 24 6107425 0 6079980 603 418 185 245 0 186 0 amapchunkpl 152 660629 0 659461 312 252 60 79 0 158 8 amappl16 200 60564 0 59674 319 269 50 60 0 8 0 amappl15 192 2678 0 2673 1 0 1 1 0 8 0 amappl14 184 2631 0 2626 1 0 1 1 0 8 0 amappl13 176 1926 0 1921 1 0 1 1 0 8 0 amappl12 168 2716 0 2709 1 0 1 1 0 8 0 amappl11 160 2133 0 2118 1 0 1 1 0 8 0 amappl10 152 1625 0 1617 1 0 1 1 0 8 0 amappl9 144 4473 0 4467 1 0 1 1 0 8 0 amappl8 136 5148 0 4982 6 0 6 6 0 8 0 amappl7 128 3325 0 3308 1 0 1 1 0 8 0 amappl6 120 4443 0 4411 6 4 2 2 0 8 0 amappl5 112 19478 0 19461 1 0 1 1 0 8 0 amappl4 104 5130 0 5100 2 1 1 2 0 8 0 amappl3 96 4679 0 4664 1 0 1 1 0 8 0 amappl2 88 4764 0 4702 3 1 2 3 0 8 0 amappl1 80 368678 0 368115 19 5 14 19 0 8 0 amappl 88 256248 0 255878 12 2 10 10 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 72 143 0 13 3 0 3 3 0 8 0 uaddrrnd 24 20566 0 20249 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 20566 0 20249 2 0 2 2 0 8 0 vmmpekpl 168 157961 0 157865 5 0 5 5 0 8 0 vmmpepl 168 1863189 0 1859648 543 374 169 185 0 357 2 vmsppl 368 20565 0 20249 31 1 30 30 0 8 0 rwobjpl 56 461442 0 450252 188 26 162 162 0 8 0 pdppl 4096 41139 0 40788 1313 954 359 359 0 8 8 pvpl 32 10447400 0 10422664 1038 797 241 339 0 265 9 pmappl 248 20565 0 20249 23 2 21 21 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 2926 0 1377 45 0 45 45 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82937ff0) 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+0x21 kd_curproc sys/dev/kcov.c:577 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x21 sys/dev/kcov.c:148 __mp_lock(ffffffff82b74aa0) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b74aa0) at __mp_lock+0x133 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82b74aa0,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x3d3 sys/kern/sched_bsd.c:416 sleep_finish(ffff8000292993a0,1) at sleep_finish+0x198 sys/kern/kern_synch.c:437 tsleep(fffffd8057d61370,11,ffffffff825effb7,0) at tsleep+0x12c sys/kern/kern_synch.c:158 biowait(fffffd8057d61370) at biowait+0x91 sys/kern/vfs_bio.c:1271 bwrite(fffffd8057d61370) at bwrite+0x21b sys/kern/vfs_bio.c:772 ufs_dirremove(fffffd8068ab3958,fffffd805be12bc0,800c,1) at ufs_dirremove+0x28b ufs_rmdir(ffff8000292995b8) at ufs_rmdir+0x267 sys/ufs/ufs/ufs_vnops.c:1328 VOP_RMDIR(fffffd8068ab3958,fffffd8055c97ea8,ffff800029299698) at VOP_RMDIR+0x122 sys/kern/vfs_vops.c:423 end trace frame: 0xffff800029299730, count: 0 ddb{0}> trace x86_ipi_db(ffffffff82937ff0) 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+0x21 kd_curproc sys/dev/kcov.c:577 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x21 sys/dev/kcov.c:148 __mp_lock(ffffffff82b74aa0) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b74aa0) at __mp_lock+0x133 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82b74aa0,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x3d3 sys/kern/sched_bsd.c:416 sleep_finish(ffff8000292993a0,1) at sleep_finish+0x198 sys/kern/kern_synch.c:437 tsleep(fffffd8057d61370,11,ffffffff825effb7,0) at tsleep+0x12c sys/kern/kern_synch.c:158 biowait(fffffd8057d61370) at biowait+0x91 sys/kern/vfs_bio.c:1271 bwrite(fffffd8057d61370) at bwrite+0x21b sys/kern/vfs_bio.c:772 ufs_dirremove(fffffd8068ab3958,fffffd805be12bc0,800c,1) at ufs_dirremove+0x28b ufs_rmdir(ffff8000292995b8) at ufs_rmdir+0x267 sys/ufs/ufs/ufs_vnops.c:1328 VOP_RMDIR(fffffd8068ab3958,fffffd8055c97ea8,ffff800029299698) at VOP_RMDIR+0x122 sys/kern/vfs_vops.c:423 dounlinkat(ffff8000267197b0,ffffff9c,7f7ffffcb760,8) at dounlinkat+0x20e sys/kern/vfs_syscalls.c:1883 syscall(ffff800029299810) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800029299810) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcb750, count: -17 ddb{0}> machine ddbcpu 1 Stopped at igmp_leavegroup+0x80: movl 0x4(%rax),%r12d igmp_leavegroup(ffff800000bd8fc0) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000bd8fc0) at in_delmulti+0xb7 sys/netinet/in.c:917 ip_freemoptions(ffff800000c249a0) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd806f67a260) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:580 rip_detach(fffffd8070b4e048) at rip_detach+0x6a sys/netinet/raw_ip.c:616 soclose(fffffd8070b4e048,0) at soclose+0x255 sys/kern/uipc_socket.c:351 soo_close(fffffd8066c96e50,ffff80002e460000) at soo_close+0x40 fdrop(fffffd8066c96e50,ffff80002e460000) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd8066c96e50,ffff80002e460000) at closef+0x11c sys/kern/kern_descrip.c:1263 fdfree(ffff80002e460000) at fdfree+0xf4 sys/kern/kern_descrip.c:1195 exit1(ffff80002e460000,0,0,3) at exit1+0x37d sys/kern/kern_exit.c:202 single_thread_check_locked(ffff80002e460000,0,0) at single_thread_check_locked+0x227 sys/kern/kern_sig.c:1963 userret(ffff80002e460000) at userret+0x27a single_thread_check sys/kern/kern_sig.c:2004 [inline] userret(ffff80002e460000) at userret+0x27a sys/kern/kern_sig.c:1951 syscall(ffff80002929f460) at syscall+0x57e mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff80002929f460) at syscall+0x57e sys/arch/amd64/amd64/trap.c:607 end trace frame: 0xffff80002929f4e0, count: 0 ddb{1}> trace igmp_leavegroup(ffff800000bd8fc0) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000bd8fc0) at in_delmulti+0xb7 sys/netinet/in.c:917 ip_freemoptions(ffff800000c249a0) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd806f67a260) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:580 rip_detach(fffffd8070b4e048) at rip_detach+0x6a sys/netinet/raw_ip.c:616 soclose(fffffd8070b4e048,0) at soclose+0x255 sys/kern/uipc_socket.c:351 soo_close(fffffd8066c96e50,ffff80002e460000) at soo_close+0x40 fdrop(fffffd8066c96e50,ffff80002e460000) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd8066c96e50,ffff80002e460000) at closef+0x11c sys/kern/kern_descrip.c:1263 fdfree(ffff80002e460000) at fdfree+0xf4 sys/kern/kern_descrip.c:1195 exit1(ffff80002e460000,0,0,3) at exit1+0x37d sys/kern/kern_exit.c:202 single_thread_check_locked(ffff80002e460000,0,0) at single_thread_check_locked+0x227 sys/kern/kern_sig.c:1963 userret(ffff80002e460000) at userret+0x27a single_thread_check sys/kern/kern_sig.c:2004 [inline] userret(ffff80002e460000) at userret+0x27a sys/kern/kern_sig.c:1951 syscall(ffff80002929f460) at syscall+0x57e mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff80002929f460) at syscall+0x57e sys/arch/amd64/amd64/trap.c:607 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd8750, count: -15