kernel: protection fault trap, code=0 Stopped at nd6_timer+0x97: movq 0x48(%rbx),%r13 ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace nd6_timer(0) at nd6_timer+0x97 sys/netinet6/nd6.c:279 timeout_run(ffffffff834f6f98) at timeout_run+0x118 softclock_thread(ffff8000ffffeca8) at softclock_thread+0x163 sys/kern/kern_timeout.c:814 end trace frame: 0x0, count: -3 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800029f9b0c0 rbx 0xdeadbeefdeadbeef rdx 0 rcx 0xffff8000ffffeca8 rax 0xffffffff83426ff0 cpu_info_full_primary+0x1ff0 r8 0x2 r9 0 r10 0x19091b5da76218e2 r11 0x479d501aa4cbbae8 r12 0x3c r13 0x1 r14 0x3d r15 0x3573ba1d2ac7d0d0 rip 0xffffffff813df4b7 nd6_timer+0x97 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800029f9b080 ss 0x10 nd6_timer+0x97: movq 0x48(%rbx),%r13 ddb{0}> show proc PROC (softclock) tid=454075 pid=38614 tcnt=1 stat=onproc flags process=14000 proc=40000200 runpri=0, usrpri=51, slppri=0, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffef30,0xffff8000ffffe010 process=0xffff800029f8e400 user=0xffff800029f96000, vmspace=0xffffffff836198e0 estcpu=1, cpticks=1, pctcpu=0.0, user=0, sys=2, intr=1 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 49098 469039 93439 0 2 0x8000000 syz-executor 49098 58507 93439 0 3 0xc000080 piperd syz-executor 49098 6010 93439 0 2 0xc000000 syz-executor 24335 416396 11193 0 2 0x8000000 syz-executor 24335 297229 11193 0 3 0xc000080 fsleep syz-executor 27335 365281 48243 0 2 0x8000000 syz-executor 27335 189833 48243 0 2 0xc000000 syz-executor 43785 294565 10820 0 2 0x8000480 syz-executor 43785 157064 10820 0 2 0xc000080 syz-executor 59128 334403 46702 0 2 0x8000480 syz-executor 59128 263092 46702 0 3 0xc000080 sbwait syz-executor 59128 478283 46702 0 3 0xc000080 fsleep syz-executor 48243 290655 68169 0 2 0x8000482 syz-executor 31039 482148 1 0 3 0x8000080 nanoslp init 49434 9703 0 0 3 0x14200 bored sosplice 46702 330911 68169 0 2 0x8000482 syz-executor 10820 39123 68169 0 7 0x8000002 syz-executor 60009 405736 68169 0 2 0x8000002 syz-executor 93439 124564 68169 0 2 0x8000482 syz-executor 11193 479995 68169 0 2 0x8000482 syz-executor 22275 238515 68169 0 3 0x8000082 piperd syz-executor 8396 223313 68169 0 3 0x8000082 piperd syz-executor 68169 315179 79563 0 2 0x8000002 syz-executor 79563 474468 36070 0 3 0x810008a sigsusp ksh 36070 151669 62350 0 3 0x18000098 kqread sshd-session 62350 428428 33346 0 3 0x18000092 kqread sshd-session 33346 419592 1 0 3 0x18000088 kqread sshd 20581 342355 85098 74 3 0x19100092 bpf pflogd 85098 48264 1 0 3 0x18000080 sbwait pflogd 14604 386583 26592 73 3 0x19100090 kqread syslogd 26592 341878 1 0 3 0x18100082 sbwait syslogd 80367 487934 1 0 3 0x18100080 kqread resolvd 97010 47607 58936 77 3 0x18100092 kqread dhcpleased 99584 326799 58936 77 3 0x18100092 kqread dhcpleased 58936 185267 1 0 3 0x18000080 kqread dhcpleased 35974 199646 0 0 2 0x14200 smr 22077 304672 0 0 2 0x14200 zerothread 1422 391082 0 0 3 0x14200 aiodoned aiodoned 73448 265553 0 0 2 0x14600 update 21288 494457 0 0 3 0x14200 cleaner cleaner 19261 423618 0 0 3 0x14200 reaper reaper 33886 264785 0 0 3 0x14200 pgdaemon pagedaemon 99432 143488 0 0 3 0x14200 bored viomb 51430 463426 0 0 3 0x40014200 acpi0 acpi0 25204 411935 0 0 3 0x40014200 idle1 69023 496183 0 0 3 0x14200 bored softnet3 73002 221444 0 0 3 0x14200 bored softnet2 15350 349075 0 0 3 0x14200 bored softnet1 55891 363347 0 0 2 0x14200 softnet0 70798 380527 0 0 2 0x14200 systqmp 82853 196358 0 0 3 0x14200 bored systq 52075 361138 0 0 3 0x14200 tmoslp softclockmp *38614 454075 0 0 7 0x40014200 softclock 55987 299761 0 0 3 0x40014200 idle0 1 193644 0 0 3 0x8000082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 60009 (syz-executor) thread 0xffff80002a03e020 (405736) exclusive rrwlock inode r = 0 (0xfffffd805c235c58) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vget+0x2bd sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x171 sys/ufs/ufs/ufs_ihash.c:95 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ufs_lookup+0x19f8 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #11 namei+0x7aa sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1852 #13 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #13 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c0103d0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1852 #8 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #8 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 38614 (softclock) thread 0xffff8000ffffeca8 (454075) exclusive rwlock netlock r = 0 (0xffffffff83434c90) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 nd6_timer+0x51 sys/netinet6/nd6.c:272 #2 timeout_run+0x118 #3 softclock_thread+0x163 sys/kern/kern_timeout.c:814 #4 proc_trampoline+0x10 shared rwlock timeout r = 0 (0xffffffff8347ca00) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 timeout_run+0xf1 sys/kern/kern_timeout.c:662 #2 softclock_thread+0x163 sys/kern/kern_timeout.c:814 #3 proc_trampoline+0x10 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff835026f0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 __mp_acquire_count+0x58 #2 mi_switch+0x658 sys/kern/sched_bsd.c:460 #3 sleep_finish+0x229 sys/kern/kern_synch.c:416 #4 msleep+0x13b sys/kern/kern_synch.c:249 #5 softclock_thread+0x11f sys/kern/kern_timeout.c:810 #6 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10200 10171K 10420K 166960K 11631 0 pcb 17 13K 14K 166960K 111 0 rtable 205 14K 16K 166960K 591 0 pf 31 17K 21K 166960K 79 0 ifaddr 35 6K 7K 166960K 72 0 ifgroup 47 2K 2K 166960K 79 0 sysctl 1 0K 0K 166960K 1 0 counters 60 35K 36K 166960K 76 0 ioctlops 0 0K 4K 166960K 1590 0 iov 1 1K 16K 166960K 21 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1409 89K 89K 166960K 1761 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 57 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 15 53K 89K 166960K 482 0 sigio 0 0K 0K 166960K 5 0 proc 63 79K 115K 166960K 732 0 subproc 104 6K 7K 166960K 182 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 38 0 in_multi 77 5K 6K 166960K 173 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 127 572K 572K 166960K 127 0 exec 0 0K 1K 166960K 480 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 209 72K 91K 166960K 5942 0 UVM aobj 16 2K 2K 166960K 16 0 pinsyscall 39 78K 102K 166960K 1716 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 16 0 NDP 10 0K 1K 166960K 46 0 temp 78 6816K 6882K 166960K 22668 0 kqueue 13 20K 28K 166960K 77 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 75 0 72 1 0 1 1 0 8 0 rtentry 112 190 0 97 3 0 3 3 0 8 0 unpcb 144 403 0 384 6 0 6 6 0 8 5 syncache 336 4 0 4 2 1 1 1 0 8 1 tcpqe 32 2 0 2 1 0 1 1 0 8 1 tcpcb 808 218 0 209 8 3 5 8 0 8 4 arp 120 33 0 19 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 1 0 0 1 0 1 1 0 8 0 inpcb 336 662 0 648 7 1 6 7 0 8 4 nd6 136 47 0 25 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 14 0 6 1 0 1 1 0 8 0 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 2 0 0 1 0 1 1 0 8 0 pfosfp 40 1428 0 1428 5 0 5 5 0 8 5 pfosfpen 112 1428 0 1428 21 0 21 21 0 8 21 pfrktable 1344 6 0 6 1 1 0 1 0 8 0 pfanchor 1288 2 0 2 1 1 0 1 0 8 0 pfstitem 24 32 0 10 1 0 1 1 0 8 0 pfstkey 128 32 0 10 1 0 1 1 0 8 0 pfstate 376 32 0 10 3 0 3 3 0 8 0 pfrule 1344 35 0 29 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 734 0 358 26 0 26 26 0 8 0 art_table 32 736 0 358 4 0 4 4 0 8 0 art_node 16 189 0 106 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 1 1 0 1 1 0 8 0 semapl 112 54 0 44 1 0 1 1 0 8 0 shmpl 112 13 0 0 1 0 1 1 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2098 0 582 96 0 96 96 0 8 0 ffsino 272 2098 0 582 102 0 102 102 0 8 0 nchpl 144 2691 0 994 64 0 64 64 0 8 0 uvmvnodes 80 2475 0 0 51 0 51 51 0 8 0 vnodes 216 2475 0 0 138 0 138 138 0 8 0 namei 1024 10003 0 10003 1 0 1 1 0 8 1 percpumem 16 52 0 8 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 2 1 1 0 1 0 8 0 kstatmem 264 36 0 16 2 0 2 2 0 8 0 scxspl 216 12389 0 12389 10 2 8 8 1 8 8 plimitpl 152 149 0 133 1 0 1 1 0 8 0 sigapl 424 773 0 725 7 0 7 7 0 8 0 futexpl 64 5073 0 5071 2 1 1 1 0 8 0 knotepl 120 356 0 0 11 0 11 11 0 8 0 kqueuepl 216 193 0 183 5 0 5 5 0 8 4 pipepl 320 154 0 126 3 0 3 3 0 8 0 fdescpl 496 753 0 724 5 0 5 5 0 8 0 filepl 152 5057 0 4806 21 3 18 18 0 8 7 lockfpl 104 209 0 206 1 0 1 1 0 8 0 lockfspl 48 67 0 64 1 0 1 1 0 8 0 sessionpl 144 30 0 22 1 0 1 1 0 8 0 pgrppl 48 46 0 30 1 0 1 1 0 8 0 ucredpl 104 693 0 680 1 0 1 1 0 8 0 zombiepl 144 725 0 725 1 0 1 1 0 8 1 processpl 1152 773 0 725 5 1 4 5 0 8 0 procpl 648 1286 0 1231 6 0 6 6 0 8 0 srpgc 96 4 0 4 1 0 1 1 0 8 1 sosppl 168 2 0 2 1 0 1 1 0 8 1 sockpl 664 1144 0 1109 17 5 12 14 0 8 8 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 258 0 0 33 0 33 33 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 295 0 0 17 0 17 17 0 8 0 bufpl 280 5412 0 101 380 0 380 380 0 8 0 anonpl 24 172982 0 169742 50 3 47 50 0 185 8 amapchunkpl 152 18876 0 18448 33 6 27 29 0 158 5 amappl16 200 4290 0 4271 20 8 12 14 0 8 8 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 127 0 116 1 0 1 1 0 8 0 amappl13 176 57 0 56 1 0 1 1 0 8 0 amappl12 168 1495 0 1467 3 1 2 2 0 8 0 amappl11 160 55 0 41 1 0 1 1 0 8 0 amappl10 152 8 0 8 1 1 0 1 0 8 0 amappl9 144 139 0 139 1 1 0 1 0 8 0 amappl8 136 18 0 16 1 0 1 1 0 8 0 amappl7 128 121 0 109 1 0 1 1 0 8 0 amappl6 120 223 0 222 1 0 1 1 0 8 0 amappl5 112 161 0 149 1 0 1 1 0 8 0 amappl4 104 339 0 322 1 0 1 1 0 8 0 amappl3 96 3743 0 3645 4 0 4 4 0 8 0 amappl2 88 712 0 649 2 0 2 2 0 8 0 amappl1 80 9241 0 8685 14 0 14 14 0 8 0 amappl 88 5492 0 5341 5 0 5 5 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 15 0 0 1 0 1 1 0 8 0 uaddrrnd 24 753 0 724 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 753 0 724 1 0 1 1 0 8 0 vmmpekpl 168 8385 0 8331 3 0 3 3 0 8 0 vmmpepl 168 55116 0 53388 96 0 96 96 0 357 12 vmsppl 440 752 0 724 6 2 4 5 0 8 0 rwobjpl 56 21723 0 18359 50 0 50 50 0 8 2 pdppl 4096 1513 0 1448 111 40 71 83 0 8 6 pvpl 32 26365 0 0 213 0 213 213 0 265 0 pmappl 248 752 0 724 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 414 0 47 11 0 11 11 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace nd6_timer(0) at nd6_timer+0x97 sys/netinet6/nd6.c:279 timeout_run(ffffffff834f6f98) at timeout_run+0x118 softclock_thread(ffff8000ffffeca8) at softclock_thread+0x163 sys/kern/kern_timeout.c:814 end trace frame: 0x0, count: -3 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x4f sys/dev/kcov.c:164 syscall(ffff8000371b4770) at syscall+0xa11 mi_syscall_return sys/sys/syscall_mi.h:207 [inline] syscall(ffff8000371b4770) at syscall+0xa11 sys/arch/amd64/amd64/trap.c:598 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70f9aae15700, count: -6