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(bffffbffffffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000b50b00) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000af8000) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff800000af8000) at if_detach+0x140 sys/net/if.c:1032 tun_clone_destroy(ffff800000af8000) at tun_clone_destroy+0x1e1 sys/net/if_tun.c:326 tun_dev_close(5d01,7) at tun_dev_close+0x160 sys/net/if_tun.c:477 spec_close(ffff800021f18ce0) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd806e6885b8,7,fffffd807f7bf600,ffff8000ffffaee8) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd806cac1d28,ffff8000ffffaee8) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd806cac1d28,ffff8000ffffaee8) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd806cac1d28,ffff8000ffffaee8) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd806cac1d28,ffff8000ffffaee8) at closef+0x11c sys/kern/kern_descrip.c:1263 fdfree(ffff8000ffffaee8) at fdfree+0x101 sys/kern/kern_descrip.c:1195 exit1(ffff8000ffffaee8,0,0,1) at exit1+0x32c sys/kern/kern_exit.c:197 sys_exit(ffff8000ffffaee8,ffff800021f18f70,ffff800021f18fc0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff800021f19040) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021f19040) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff09f0, count: -16 ddb{1}> show registers rdi 0x2 rsi 0 rbp 0xffff800021f18ab0 rbx 0 rdx 0 rcx 0 rax 0xffff8000ffffaee8 r8 0xffff800000b50b00 r9 0xffffffff81e56833 rt_ifa_purge+0x153 r10 0x5 r11 0x4178b7e7deaafcda r12 0 r13 0x3 r14 0xbffffbffffffffff r15 0x1 rip 0xffffffff823bf7bd in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800021f18a50 ss 0 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb{1}> show proc PROC (syz-executor.1) pid=153475 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800021f0fb50,0xffffffff828cde18 process=0xffff800020ecefc0 user=0xffff800021f14000, vmspace=0xfffffd806437d2f8 estcpu=36, cpticks=5, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 65691 418619 0 0 3 0x14280 nfsidl nfsio 80635 77920 0 0 3 0x14280 nfsidl nfsio 24516 233706 0 0 3 0x14280 nfsidl nfsio 71924 512419 0 0 3 0x14280 nfsidl nfsio 74487 398606 0 0 3 0x14280 nfsidl nfsio 65584 319173 0 0 3 0x14280 nfsidl nfsio 14691 264372 0 0 3 0x14280 nfsidl nfsio 77745 378001 0 0 3 0x14280 nfsidl nfsio 37642 162032 0 0 3 0x14280 nfsidl nfsio 82243 125320 0 0 3 0x14280 nfsidl nfsio 26529 523191 0 0 3 0x14280 nfsidl nfsio 2573 266592 0 0 3 0x14280 nfsidl nfsio 36677 349009 0 0 3 0x14280 nfsidl nfsio 65110 284526 0 0 3 0x14280 nfsidl nfsio 96124 340209 0 0 3 0x14280 nfsidl nfsio 6795 252563 0 0 3 0x14280 nfsidl nfsio 48510 111538 0 0 3 0x14280 nfsidl nfsio 77530 442615 0 0 3 0x14280 nfsidl nfsio 67777 126722 0 0 3 0x14280 nfsidl nfsio 87730 511901 0 0 3 0x14280 nfsidl nfsio 76971 437573 0 0 3 0x14200 bored sosplice 21883 227337 52811 0 2 0x2 syz-executor.0 52811 8548 67671 0 3 0x82 thrsleep syz-fuzzer 52811 444876 67671 0 3 0x4000082 nanosleep syz-fuzzer 52811 243326 67671 0 7 0x4000002 syz-fuzzer 52811 397154 67671 0 3 0x4000002 biowait syz-fuzzer 52811 417028 67671 0 3 0x4000082 thrsleep syz-fuzzer 52811 18343 67671 0 3 0x4000082 thrsleep syz-fuzzer 52811 458215 67671 0 3 0x4000082 thrsleep syz-fuzzer 52811 39749 67671 0 3 0x4000082 thrsleep syz-fuzzer 67671 313834 33214 0 3 0x10008a pause ksh 33214 449444 90445 0 3 0x92 select sshd 57148 158234 1 0 3 0x100083 ttyin getty 90445 513029 1 0 3 0x80 select sshd 50514 268754 70521 74 3 0x100092 bpf pflogd 70521 180678 1 0 3 0x80 netio pflogd 66160 479917 83070 73 3 0x100010 ffs_fsync syslogd 83070 408097 1 0 3 0x100082 netio syslogd 90520 110694 1 77 2 0x100090 dhclient 27988 213724 1 0 3 0x80 poll dhclient 17256 712 0 0 3 0x14200 bored smr 91045 154317 0 0 3 0x14200 pgzero zerothread 16362 903 0 0 3 0x14200 aiodoned aiodoned 85303 169344 0 0 3 0x14200 syncer update 90233 138649 0 0 3 0x14200 cleaner cleaner 62978 316037 0 0 3 0x14200 reaper reaper 65306 18474 0 0 3 0x14200 pgdaemon pagedaemon 53177 31745 0 0 3 0x14200 bored crynlk 73258 491207 0 0 3 0x14200 bored crypto 96590 371400 0 0 3 0x40014200 acpi0 acpi0 40115 471096 0 0 3 0x40014200 idle1 65366 354565 0 0 3 0x14200 bored softnet 55624 204571 0 0 2 0x14200 systqmp 81474 478941 0 0 3 0x14200 bored systq 24204 470573 0 0 3 0x40014200 bored softclock 75248 243401 0 0 3 0x40014200 idle0 1 434813 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 52811 (syz-fuzzer) thread 0xffff8000fffff648 (397154) exclusive rrwlock inode r = 0 (0xfffffd806c9efb38) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vget+0x1c8 sys/kern/vfs_subr.c:671 #6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1329 #8 ufs_lookup+0x14b7 sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90 #10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568 #11 namei+0x63c sys/kern/vfs_lookup.c:249 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806edfcb48) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #9 Xsyscall+0x128 Process 66160 (syslogd) thread 0xffff8000ffffe500 (479917) exclusive rrwlock inode r = 0 (0xfffffd806ec3ba28) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 sys_fsync+0x113 sys/kern/vfs_syscalls.c:2874 #6 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9516 6411K 6913K 78643K 11369 0 pcb 13 8K 8K 78643K 83 0 rtable 80 11K 15K 78643K 418 0 ifaddr 80 16K 17K 78643K 161 0 sysctl 2 0K 0K 78643K 2 0 counters 43 33K 34K 78643K 67 0 ioctlops 0 0K 4K 78643K 1590 0 iov 0 0K 16K 78643K 47 0 mount 1 1K 1K 78643K 1 0 vnodes 1217 77K 77K 78643K 1467 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 20 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 226 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 4 9K 25K 78643K 664 0 sigio 0 0K 0K 78643K 6 0 proc 62 63K 95K 78643K 496 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 52 0 in_multi 66 3K 3K 78643K 108 0 ether_multi 1 0K 0K 78643K 9 0 mrt 0 0K 0K 78643K 6 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 263 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 180 92K 92K 78643K 3228 0 UVM aobj 36 6K 6K 78643K 44 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 12 0K 0K 78643K 30 0 temp 139 3886K 3962K 78643K 11657 0 kqueue 3 4K 12K 78643K 22 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 7 0 3 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 88 37 0 35 1 0 1 1 0 8 0 rtentry 112 56 0 29 2 0 2 2 0 8 0 unpcb 120 407 0 397 1 0 1 1 0 8 0 syncache 272 10 0 10 4 4 0 1 0 8 0 tcpqe 32 313 0 313 2 2 0 1 0 8 0 tcpcb 592 1067 0 1043 9 6 3 5 0 8 1 inpcb 296 1478 0 1471 4 2 2 2 0 8 1 rttmr 72 2 0 2 1 1 0 1 0 8 0 nd6 48 8 0 4 1 0 1 1 0 8 0 pkpcb 40 6 0 6 3 2 1 1 0 8 1 ppxss 1136 3 0 3 3 2 1 1 0 8 1 pfstscr 40 4 0 4 1 1 0 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 49 0 47 1 0 1 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 38 0 38 3 3 0 1 0 8 0 pfstitem 24 49 0 26 1 0 1 1 0 8 0 pfstkey 112 51 0 28 2 0 2 2 0 8 1 pfstate 328 49 0 26 3 0 3 3 0 8 0 pfrule 1360 31 0 28 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 306 0 176 12 1 11 12 0 8 0 art_table 32 307 0 176 2 0 2 2 0 8 0 art_node 16 55 0 30 1 0 1 1 0 8 0 sysvmsgpl 40 63 0 23 1 0 1 1 0 8 0 semapl 112 220 0 210 1 0 1 1 0 8 0 shmpl 112 41 0 8 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2226 0 825 88 0 88 88 0 8 0 ffsino 272 2226 0 825 94 0 94 94 0 8 0 nchpl 144 3365 0 1761 60 0 60 60 0 8 0 uvmvnodes 72 2444 0 0 45 0 45 45 0 8 0 vnodes 208 2444 0 0 129 0 129 129 0 8 0 namei 1024 9691 0 9691 3 2 1 1 0 8 1 percpumem 16 44 0 12 1 0 1 1 0 8 0 vcpupl 1984 10 0 0 2 0 2 2 0 8 0 vmpool 560 10 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 12 0 12 3 3 0 1 0 8 0 scxspl 200 9687 0 9685 12 11 1 7 0 8 0 plimitpl 152 45 0 37 1 0 1 1 0 8 0 sigapl 424 901 0 850 7 0 7 7 0 8 1 futexpl 56 10069 0 10069 3 2 1 1 0 8 1 knotepl 112 79 0 61 1 0 1 1 0 8 0 kqueuepl 152 88 0 86 1 0 1 1 0 8 0 pipepl 304 161 0 151 3 1 2 2 0 8 1 fdescpl 496 864 0 849 3 0 3 3 0 8 0 filepl 152 5146 0 5056 8 3 5 6 0 8 1 lockfpl 104 129 0 128 1 0 1 1 0 8 0 lockfspl 48 44 0 43 1 0 1 1 0 8 0 sessionpl 120 18 0 7 1 0 1 1 0 8 0 pgrppl 48 24 0 13 1 0 1 1 0 8 0 ucredpl 96 390 0 381 1 0 1 1 0 8 0 zombiepl 144 851 0 850 2 1 1 1 0 8 0 processpl 1008 901 0 850 10 3 7 7 0 8 0 procpl 632 2395 0 2337 7 1 6 6 0 8 1 sosppl 144 4 0 4 2 2 0 1 0 8 0 sockpl 400 1930 0 1910 9 5 4 4 0 8 1 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 14 0 0 2 0 2 2 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 8 0 0 1 0 1 1 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 317 0 0 39 0 39 39 0 8 0 mtagpl 96 22 0 0 1 0 1 1 0 8 0 mbufpl 256 312 0 0 19 0 19 19 0 8 0 bufpl 280 4459 0 128 310 0 310 310 0 8 0 anonpl 16 111917 0 93413 114 37 77 91 0 124 0 amapchunkpl 152 6187 0 5871 48 35 13 27 0 158 0 amappl16 192 4340 0 3481 80 36 44 54 0 8 0 amappl15 184 307 0 305 1 0 1 1 0 8 0 amappl14 176 8 0 4 1 0 1 1 0 8 0 amappl13 168 39 0 35 1 0 1 1 0 8 0 amappl12 160 23 0 19 1 0 1 1 0 8 0 amappl11 152 58 0 43 1 0 1 1 0 8 0 amappl10 144 654 0 648 1 0 1 1 0 8 0 amappl9 136 368 0 366 1 0 1 1 0 8 0 amappl8 128 355 0 314 2 0 2 2 0 8 0 amappl7 120 437 0 423 1 0 1 1 0 8 0 amappl6 112 25 0 22 1 0 1 1 0 8 0 amappl5 104 774 0 757 1 0 1 1 0 8 0 amappl4 96 501 0 473 1 0 1 1 0 8 0 amappl3 88 157 0 148 1 0 1 1 0 8 0 amappl2 80 6283 0 6213 2 0 2 2 0 8 0 amappl1 72 35239 0 34808 22 12 10 17 0 8 0 amappl 80 2685 0 2596 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 43 0 8 1 0 1 1 0 8 0 uaddrrnd 24 874 0 849 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 874 0 849 1 0 1 1 0 8 0 vmmpekpl 168 10219 0 10178 3 0 3 3 0 8 0 vmmpepl 168 118412 0 116394 145 47 98 108 0 357 4 vmsppl 368 873 0 849 4 1 3 3 0 8 0 pdppl 4096 1755 0 1708 7 0 7 7 0 8 0 pvpl 32 320718 0 299031 258 59 199 213 0 265 20 pmappl 232 873 0 849 3 1 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 291 0 16 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff82785ff0) 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 __mp_lock(ffffffff82933140) at __mp_lock+0x12e __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82933140) at __mp_lock+0x12e sys/kern/kern_lock.c:147 intr_handler(ffff800020e8e380,ffff80000004a400) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge17_untramp() at Xintr_ioapic_edge17_untramp+0x19f __mp_lock(ffffffff82933140) at __mp_lock+0x12e __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82933140) at __mp_lock+0x12e sys/kern/kern_lock.c:147 syscall(ffff800020e8e550) at syscall+0x400 mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff800020e8e550) at syscall+0x400 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc00004db48, count: -9 ddb{0}> machine ddbcpu 1 Stopped at in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb{1}> trace in_delmulti(bffffbffffffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000b50b00) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000af8000) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff800000af8000) at if_detach+0x140 sys/net/if.c:1032 tun_clone_destroy(ffff800000af8000) at tun_clone_destroy+0x1e1 sys/net/if_tun.c:326 tun_dev_close(5d01,7) at tun_dev_close+0x160 sys/net/if_tun.c:477 spec_close(ffff800021f18ce0) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd806e6885b8,7,fffffd807f7bf600,ffff8000ffffaee8) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd806cac1d28,ffff8000ffffaee8) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd806cac1d28,ffff8000ffffaee8) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd806cac1d28,ffff8000ffffaee8) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd806cac1d28,ffff8000ffffaee8) at closef+0x11c sys/kern/kern_descrip.c:1263 fdfree(ffff8000ffffaee8) at fdfree+0x101 sys/kern/kern_descrip.c:1195 exit1(ffff8000ffffaee8,0,0,1) at exit1+0x32c sys/kern/kern_exit.c:197 sys_exit(ffff8000ffffaee8,ffff800021f18f70,ffff800021f18fc0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff800021f19040) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021f19040) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff09f0, count: -16