kernel: protection fault trap, code=0 Stopped at in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace in_delmulti(2003fff7edfdff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff8000009c4600) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff8000009c1000) at in_ifdetach+0x74 sys/netinet/in.c:969 if_detach(ffff8000009c1000) at if_detach+0x140 sys/net/if.c:1151 tun_clone_destroy(ffff8000009c1000) at tun_clone_destroy+0x179 sys/net/if_tun.c:312 spec_close(ffff800020b75350) at spec_close+0x311 sys/kern/spec_vnops.c:555 VOP_CLOSE(fffffd80761374e8,7,fffffd807f7c6540,ffff800020ace780) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:175 vn_closefile(fffffd80657a3868,ffff800020ace780) at vn_closefile+0xd8 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80657a3868,ffff800020ace780) at vn_closefile+0xd8 sys/kern/vfs_vnops.c:610 fdrop(fffffd80657a3868,ffff800020ace780) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd80657a3868,ffff800020ace780) at closef+0x11d sys/kern/kern_descrip.c:1257 fdfree(ffff800020ace780) at fdfree+0x101 sys/kern/kern_descrip.c:1189 exit1(ffff800020ace780,19,1) at exit1+0x32f sys/kern/kern_exit.c:196 postsig(ffff800020ace780,19) at postsig+0x4e3 sigexit sys/kern/kern_sig.c:1499 [inline] postsig(ffff800020ace780,19) at postsig+0x4e3 sys/kern/kern_sig.c:1431 userret(ffff800020ace780) at userret+0x199 sys/kern/kern_sig.c:1889 syscall(ffff800020b757d0) at syscall+0x55f mi_syscall_return sys/sys/syscall_mi.h:115 [inline] syscall(ffff800020b757d0) at syscall+0x55f sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd7580, count: -16 ddb{1}> show registers rdi 0x2 rsi 0 rbp 0xffff800020b75180 rbx 0 rdx 0xffff800020ace780 rcx 0 rax 0 r8 0xffffffff81342423 rt_ifa_purge+0x153 r9 0x5 r10 0x2f r11 0x25d096023d26bfa0 r12 0 r13 0x3 r14 0x2003fff7edfdff r15 0x1 rip 0xffffffff81eee24d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800020b75120 ss 0x10 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb{1}> show proc PROC (syz-executor.0) pid=338221 stat=onproc flags process=a proc=2000 pri=70, usrpri=70, nice=20 forw=0xffffffffffffffff, list=0xffff800020aceee8,0xffff800020ace518 process=0xffff800020aec380 user=0xffff800020b70000, vmspace=0xfffffd807f008a10 estcpu=36, cpticks=4, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 71799 133741 0 0 3 0x14200 bored sosplice 62815 451098 66674 0 3 0x2 biowait syz-executor.1 66674 29847 28964 0 3 0x82 thrsleep syz-fuzzer 66674 368733 28964 0 3 0x4000082 nanosleep syz-fuzzer 66674 422321 28964 0 3 0x4000082 thrsleep syz-fuzzer 66674 179448 28964 0 3 0x4000082 thrsleep syz-fuzzer 66674 462114 28964 0 3 0x4000082 thrsleep syz-fuzzer 66674 162347 28964 0 3 0x4000082 thrsleep syz-fuzzer 66674 83280 28964 0 3 0x4000082 thrsleep syz-fuzzer 66674 375984 28964 0 7 0x4000002 syz-fuzzer 66674 257352 28964 0 3 0x4000082 thrsleep syz-fuzzer 66674 419575 28964 0 3 0x4000082 nanosleep syz-fuzzer 28964 238411 79764 0 3 0x10008a pause ksh 79764 170358 94057 0 3 0x92 select sshd 37873 330786 1 0 3 0x100083 ttyin getty 94057 342268 1 0 3 0x80 select sshd 74532 431130 56334 74 3 0x100092 bpf pflogd 56334 139064 1 0 3 0x80 netio pflogd 21983 277989 17876 73 3 0x100090 kqread syslogd 17876 464126 1 0 3 0x100082 netio syslogd 49738 187917 1 77 3 0x100090 poll dhclient 63552 160634 1 0 3 0x80 poll dhclient 32267 331505 0 0 2 0x14200 zerothread 31840 362874 0 0 3 0x14200 aiodoned aiodoned 74046 382940 0 0 3 0x14200 syncer update 77311 322521 0 0 3 0x14200 cleaner cleaner 99964 348531 0 0 3 0x14200 reaper reaper 96990 34139 0 0 3 0x14200 pgdaemon pagedaemon 80152 129890 0 0 3 0x14200 bored crynlk 8105 25530 0 0 3 0x14200 bored crypto 71723 512257 0 0 3 0x40014200 acpi0 acpi0 62050 396161 0 0 3 0x40014200 idle1 66939 57676 0 0 2 0x14200 softnet 92778 196260 0 0 3 0x14200 bored systqmp 24264 485374 0 0 3 0x14200 bored systq 15611 362280 0 0 3 0x40014200 bored softclock 63741 260960 0 0 3 0x40014200 idle0 29519 36617 0 0 3 0x14200 bored smr 1 42591 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 62815 (syz-executor.1) thread 0xffff800020ace508 (451098) exclusive rrwlock inode r = 0 (0xfffffd806f6e3a30) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:453 #3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1352 #5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392 #6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1164 #7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450 #8 domkdirat+0x121 sys/kern/vfs_syscalls.c:2974 #9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #10 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806acde6f8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:453 #3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:571 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:2959 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9530 6550K 7905K 78643K 11975 0 pcb 13 8K 8K 78643K 95 0 rtable 99 11K 12K 78643K 280 0 ifaddr 83 16K 16K 78643K 106 0 counters 39 33K 33K 78643K 39 0 ioctlops 0 0K 4K 78643K 1614 0 iov 0 0K 14K 78643K 31 0 mount 1 1K 1K 78643K 1 0 vnodes 1226 77K 77K 78643K 1580 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 5 0 VM map 2 1K 1K 78643K 2 0 sem 11 1K 1K 78643K 12 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 4 9K 25K 78643K 226 0 proc 60 63K 95K 78643K 462 0 subproc 23 1K 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 11 0 in_multi 62 3K 3K 78643K 87 0 ether_multi 1 0K 0K 78643K 3 0 mrt 1 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 54 238K 238K 78643K 54 0 exec 0 0K 1K 78643K 228 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 125 38K 39K 78643K 1698 0 UVM aobj 13 2K 2K 78643K 13 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 46 0 NDP 13 0K 0K 78643K 20 0 temp 140 3019K 3094K 78643K 5368 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 arp 64 6 0 2 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 35 0 33 1 0 1 1 0 8 0 rtentry 112 57 0 19 2 0 2 2 0 8 0 unpcb 120 139 0 129 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 547 0 547 1 1 0 1 0 8 0 tcpcb 544 73 0 69 1 0 1 1 0 8 0 inpcb 280 511 0 504 2 0 2 2 0 8 1 ip6q 72 1 0 1 1 0 1 1 0 8 1 ip6af 40 3 0 3 1 0 1 1 0 8 1 nd6 48 6 0 4 1 0 1 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 1 0 1 1 0 1 1 0 8 1 pffrag 232 18 0 18 2 1 1 1 0 482 1 pffrnode 88 18 0 18 2 1 1 1 0 8 1 pffrent 40 122 0 122 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 32 0 5 1 0 1 1 0 8 0 pfstkey 112 32 0 5 1 0 1 1 0 8 0 pfstate 328 32 0 5 3 0 3 3 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 291 0 82 14 0 14 14 0 8 0 art_table 32 293 0 82 2 0 2 2 0 8 0 art_node 16 56 0 20 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 10 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 10 0 1 1 0 1 1 0 8 0 shmpl 112 11 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1732 0 329 46 0 46 46 0 8 0 ffsino 272 1732 0 329 95 1 94 95 0 8 0 nchpl 144 2280 0 664 61 0 61 61 0 8 0 uvmvnodes 72 2088 0 0 38 0 38 38 0 8 0 vnodes 208 2088 0 0 110 0 110 110 0 8 0 namei 1024 6376 0 6375 1 0 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 560 4 0 2 1 0 1 1 0 8 0 scxspl 192 6175 0 6174 8 7 1 7 0 8 0 plimitpl 152 17 0 9 1 0 1 1 0 8 0 sigapl 432 425 0 411 3 1 2 3 0 8 0 futexpl 56 5483 0 5483 1 0 1 1 0 8 1 knotepl 112 83 0 64 1 0 1 1 0 8 0 kqueuepl 104 126 0 124 1 0 1 1 0 8 0 pipepl 160 230 0 212 2 1 1 2 0 8 0 fdescpl 488 426 0 411 3 0 3 3 0 8 0 filepl 152 3120 0 3030 6 1 5 6 0 8 1 lockfpl 104 64 0 63 1 0 1 1 0 8 0 lockfspl 48 26 0 25 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 30 0 19 1 0 1 1 0 8 0 ucredpl 96 203 0 194 1 0 1 1 0 8 0 zombiepl 144 412 0 411 1 0 1 1 0 8 0 processpl 896 442 0 411 4 0 4 4 0 8 0 procpl 632 901 0 861 5 0 5 5 0 8 0 sosppl 128 23 0 23 1 1 0 1 0 8 0 sockpl 384 716 0 697 6 2 4 5 0 8 2 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 178 0 0 22 0 22 22 0 8 0 mtagpl 80 10 0 0 1 0 1 1 0 8 0 mbufpl 256 328 0 0 20 0 20 20 0 8 0 bufpl 280 7607 0 1340 448 0 448 448 0 8 0 anonpl 16 60449 0 40389 99 2 97 98 0 125 16 amapchunkpl 152 2428 0 2271 9 1 8 9 0 158 0 amappl16 192 2246 0 1154 68 6 62 68 0 8 6 amappl15 184 59 0 55 1 0 1 1 0 8 0 amappl14 176 128 0 122 1 0 1 1 0 8 0 amappl13 168 96 0 95 1 0 1 1 0 8 0 amappl12 160 7 0 6 2 1 1 1 0 8 0 amappl11 152 60 0 45 1 0 1 1 0 8 0 amappl10 144 14 0 8 1 0 1 1 0 8 0 amappl9 136 557 0 552 1 0 1 1 0 8 0 amappl8 128 142 0 111 2 0 2 2 0 8 0 amappl7 120 102 0 91 1 0 1 1 0 8 0 amappl6 112 59 0 52 1 0 1 1 0 8 0 amappl5 104 248 0 233 1 0 1 1 0 8 0 amappl4 96 680 0 647 1 0 1 1 0 8 0 amappl3 88 128 0 121 1 0 1 1 0 8 0 amappl2 80 2638 0 2569 3 1 2 3 0 8 0 amappl1 72 19185 0 18758 26 16 10 21 0 8 0 amappl 80 1165 0 1119 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 12 0 0 1 0 1 1 0 8 0 uaddrrnd 24 430 0 413 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 430 0 413 1 0 1 1 0 8 0 vmmpekpl 168 7176 0 7142 2 0 2 2 0 8 0 vmmpepl 168 60212 0 58032 143 13 130 138 0 357 28 vmsppl 368 429 0 413 2 0 2 2 0 8 0 pdppl 4096 867 0 828 6 0 6 6 0 8 0 pvpl 32 188825 0 165644 231 2 229 231 0 265 37 pmappl 232 429 0 413 2 0 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 176 0 4 5 0 5 5 0 8 0