panic: kernel diagnostic assertion "ifp != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/netinet/if_ether.c", line 776 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 471006 24199 0 0 0 1 syz-executor.6 *521249 175 0 0x14000 0x40000200 0K softclock db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82750286) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cb2a3,ffffffff827c8942,308,ffffffff8271d37d) at __assert+0x25 sys/kern/subr_prf.c:157 arptfree(fffffd807e0d0400) at arptfree+0x12e sys/netinet/if_ether.c:776 arptimer(ffffffff82cb10f8) at arptimer+0x88 sys/netinet/if_ether.c:135 timeout_run(ffffffff82cb10f8) at timeout_run+0xcc sys/kern/kern_timeout.c:641 softclock_thread(ffff800021178ae0) at softclock_thread+0x134 sys/kern/kern_timeout.c:765 end trace frame: 0x0, count: 8 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: kernel diagnostic assertion "ifp != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/netinet/if_ether.c", line 776 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82750286) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cb2a3,ffffffff827c8942,308,ffffffff8271d37d) at __assert+0x25 sys/kern/subr_prf.c:157 arptfree(fffffd807e0d0400) at arptfree+0x12e sys/netinet/if_ether.c:776 arptimer(ffffffff82cb10f8) at arptimer+0x88 sys/netinet/if_ether.c:135 timeout_run(ffffffff82cb10f8) at timeout_run+0xcc sys/kern/kern_timeout.c:641 softclock_thread(ffff800021178ae0) at softclock_thread+0x134 sys/kern/kern_timeout.c:765 end trace frame: 0x0, count: -7 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800021185ac0 rbx 0xffffffff82bdeb8f cpu_info_full_primary+0x2b8f rdx 0 rcx 0 rax 0xffff800021178ae0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x2c30b4e19b2e9d12 r11 0xe7f64926e7dc8451 r12 0xffffffff82bde990 cpu_info_full_primary+0x2990 r13 0 r14 0 r15 0x1 rip 0xffffffff81493698 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021185ab0 ss 0 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (softclock) pid=521249 stat=onproc flags process=14000 proc=40000200 pri=0, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000211795c0,0xffff800021178838 process=0xffff8000ffffe9e0 user=0xffff800021180000, vmspace=0xffffffff82ca6200 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 74404 117832 76316 0 2 0 syz-executor.1 74404 133949 76316 0 3 0x4000080 fsleep syz-executor.1 74404 259003 76316 0 2 0x4000000 syz-executor.1 11222 521499 53512 0 2 0 syz-executor.7 85626 356540 73736 0 3 0x80 nanoslp syz-executor.4 85626 474237 73736 0 3 0x4000080 fsleep syz-executor.4 85626 523934 73736 0 3 0x4000080 fsleep syz-executor.4 56218 282579 54919 0 2 0 syz-executor.0 56218 408882 54919 0 2 0x4000000 syz-executor.0 24199 471006 2846 0 7 0 syz-executor.6 24199 426992 2846 0 2 0x4000000 syz-executor.6 24199 495793 2846 0 3 0x4000080 fsleep syz-executor.6 41067 278064 49616 0 2 0 syz-executor.3 41067 288536 49616 0 2 0x4000000 syz-executor.3 76316 451658 18467 0 3 0x82 nanoslp syz-executor.1 4223 256696 18467 0 2 0x2 syz-executor.5 49616 323196 18467 0 3 0x82 nanoslp syz-executor.3 73736 435574 18467 0 3 0x82 nanoslp syz-executor.4 54919 62801 18467 0 3 0x82 nanoslp syz-executor.0 31907 29860 0 0 3 0x14280 nfsidl nfsio 76429 133554 0 0 3 0x14280 nfsidl nfsio 13647 466873 0 0 3 0x14280 nfsidl nfsio 12371 332663 0 0 3 0x14280 nfsidl nfsio 36506 150541 0 0 3 0x14280 nfsidl nfsio 37507 313916 0 0 3 0x14280 nfsidl nfsio 47446 181344 0 0 3 0x14280 nfsidl nfsio 41700 322618 0 0 3 0x14280 nfsidl nfsio 89925 405739 0 0 3 0x14280 nfsidl nfsio 20712 3745 0 0 3 0x14280 nfsidl nfsio 42594 305948 0 0 3 0x14280 nfsidl nfsio 96850 213154 0 0 3 0x14280 nfsidl nfsio 52462 190689 0 0 3 0x14280 nfsidl nfsio 92347 220449 0 0 3 0x14280 nfsidl nfsio 274 359557 0 0 3 0x14280 nfsidl nfsio 8558 306538 0 0 3 0x14280 nfsidl nfsio 29722 495715 0 0 3 0x14280 nfsidl nfsio 38825 163821 0 0 3 0x14280 nfsidl nfsio 82932 177335 0 0 3 0x14280 nfsidl nfsio 76130 223798 0 0 3 0x14280 nfsidl nfsio 53512 150194 18467 0 3 0x82 nanoslp syz-executor.7 38401 172484 0 0 3 0x14200 acct acct 11372 352166 0 0 3 0x14200 bored sosplice 2846 174676 18467 0 3 0x82 nanoslp syz-executor.6 18467 178572 69875 0 3 0x82 thrsleep syz-fuzzer 18467 75010 69875 0 2 0x4000482 syz-fuzzer 18467 128645 69875 0 3 0x4000082 wait syz-fuzzer 18467 148378 69875 0 3 0x4000082 thrsleep syz-fuzzer 18467 154084 69875 0 3 0x4000082 wait syz-fuzzer 18467 219560 69875 0 3 0x4000082 thrsleep syz-fuzzer 18467 322664 69875 0 3 0x4000082 wait syz-fuzzer 18467 104553 69875 0 3 0x4000082 wait syz-fuzzer 18467 440670 69875 0 3 0x4000082 thrsleep syz-fuzzer 18467 111654 69875 0 3 0x4000082 kqread syz-fuzzer 18467 267739 69875 0 3 0x4000082 thrsleep syz-fuzzer 18467 364482 69875 0 3 0x4000082 wait syz-fuzzer 18467 173140 69875 0 3 0x4000082 wait syz-fuzzer 18467 195377 69875 0 3 0x4000082 wait syz-fuzzer 18467 431213 69875 0 3 0x4000082 thrsleep syz-fuzzer 18467 225481 69875 0 3 0x4000082 wait syz-fuzzer 69875 356598 58933 0 3 0x10008a sigsusp ksh 58933 98556 22896 0 3 0x9a kqread sshd 49972 95413 1 0 3 0x100083 ttyin getty 22896 268812 1 0 3 0x88 kqread sshd 11978 74046 52321 74 3 0x1100092 bpf pflogd 52321 359730 1 0 3 0x80 netio pflogd 8608 399482 19722 73 3 0x1100090 kqread syslogd 19722 502081 1 0 3 0x100082 netio syslogd 87660 152537 1 0 3 0x100080 kqread resolvd 73449 457375 56088 77 3 0x100092 kqread dhcpleased 3645 132939 56088 77 3 0x100092 kqread dhcpleased 56088 49297 1 0 3 0x80 kqread dhcpleased 75269 134856 0 0 3 0x14200 bored smr 75144 274989 0 0 2 0x14200 zerothread 69071 485441 0 0 3 0x14200 aiodoned aiodoned 64250 206731 0 0 3 0x14200 syncer update 96370 395982 0 0 3 0x14200 cleaner cleaner 20377 293141 0 0 3 0x14200 reaper reaper 93903 44574 0 0 3 0x14200 pgdaemon pagedaemon 42063 17372 0 0 3 0x14200 bored viomb 67474 186178 0 0 3 0x40014200 acpi0 acpi0 34112 232178 0 0 3 0x40014200 idle1 34693 299324 0 0 3 0x14200 bored softnet 65170 105864 0 0 3 0x14200 bored softnet 98355 124592 0 0 3 0x14200 bored softnet 1131 305515 0 0 3 0x14200 bored softnet 14137 408025 0 0 3 0x14200 bored systqmp 85452 242009 0 0 3 0x14200 bored systq * 175 521249 0 0 7 0x40014200 softclock 31702 72113 0 0 3 0x40014200 idle0 1 109302 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 24199 (syz-executor.6) thread 0xffff800021228020 (471006) exclusive rwlock amaplk r = 0 (0xfffffd80667c5048) #0 witness_lock+0x44d #1 uvm_fault_check+0x419 sys/uvm/uvm_fault.c:783 #2 uvm_fault+0xf2 sys/uvm/uvm_fault.c:601 #3 upageflttrap+0x85 sys/arch/amd64/amd64/trap.c:186 #4 usertrap+0x204 sys/arch/amd64/amd64/trap.c:438 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd8077e09ac8) #0 witness_lock+0x44d #1 uvmfault_lookup+0xc9 sys/uvm/uvm_fault.c:1773 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:673 #3 uvm_fault+0xf2 sys/uvm/uvm_fault.c:601 #4 upageflttrap+0x85 sys/arch/amd64/amd64/trap.c:186 #5 usertrap+0x204 sys/arch/amd64/amd64/trap.c:438 #6 recall_trap+0x8 Process 41067 (syz-executor.3) thread 0xffff800021201b68 (288536) exclusive rrwlock inode r = 0 (0xfffffd80633bf098) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 uvm_vnp_uncache+0x112 sys/uvm/uvm_vnode.c:1421 #6 ffs_write+0x52b sys/ufs/ffs/ffs_vnops.c:356 #7 VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 #8 vn_write+0x157 sys/kern/vfs_vnops.c:408 #9 dofilewritev+0x19c sys/kern/sys_generic.c:375 #10 sys_writev+0xa7 sys/kern/sys_generic.c:322 #11 syscall+0x57c mi_syscall sys/sys/syscall_mi.h:113 [inline] #11 syscall+0x57c sys/arch/amd64/amd64/trap.c:626 #12 Xsyscall+0x128 Process 4223 (syz-executor.5) thread 0xffff8000212bb080 (256696) exclusive rrwlock inode r = 0 (0xfffffd806e38d1b8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1353 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1150 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 #10 syscall+0x555 mi_syscall sys/sys/syscall_mi.h:113 [inline] #10 syscall+0x555 sys/arch/amd64/amd64/trap.c:626 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c1b1f88) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3097 #8 syscall+0x555 mi_syscall sys/sys/syscall_mi.h:113 [inline] #8 syscall+0x555 sys/arch/amd64/amd64/trap.c:626 #9 Xsyscall+0x128 Process 175 (softclock) thread 0xffff800021178ae0 (521249) exclusive rwlock netlock r = 0 (0xffffffff82bd12a0) #0 witness_lock+0x44d #1 arptimer+0x22 sys/netinet/if_ether.c:132 #2 timeout_run+0xcc sys/kern/kern_timeout.c:641 #3 softclock_thread+0x134 sys/kern/kern_timeout.c:765 #4 proc_trampoline+0x1c shared rwlock timeout r = 0 (0xffffffff82b93840) #0 witness_lock+0x44d #1 timeout_run+0xb7 sys/kern/kern_timeout.c:637 #2 softclock_thread+0x134 sys/kern/kern_timeout.c:765 #3 proc_trampoline+0x1c exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82c98668) #0 witness_lock+0x44d #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x3bb sys/kern/sched_bsd.c:415 #3 sleep_finish+0x180 sys/kern/kern_synch.c:417 #4 softclock_thread+0xd9 sys/kern/kern_timeout.c:760 #5 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10257 6520K 6909K 78643K 16396 0 pcb 13 16K 18K 78643K 456 0 rtable 236 17K 18K 78643K 1240 0 ifaddr 95 28K 28K 78643K 338 0 sysctl 2 0K 0K 78643K 2 0 counters 60 35K 36K 78643K 326 0 ioctlops 0 0K 4K 78643K 1747 0 iov 1 0K 28K 78643K 416 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1514 95K 95K 78643K 3852 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 45 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1074 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 16 57K 93K 78643K 3642 0 sigio 0 0K 0K 78643K 40 0 proc 71 91K 128K 78643K 1110 0 subproc 104 6K 7K 78643K 299 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 381 0 in_multi 88 5K 6K 78643K 362 0 ether_multi 1 0K 0K 78643K 20 0 mrt 1 0K 0K 78643K 47 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 247 1102K 1102K 78643K 247 0 exec 0 0K 1K 78643K 888 0 pfkey data 0 0K 0K 78643K 3 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 8 62K 64K 78643K 10 0 UVM amap 350 88K 96K 78643K 26964 0 UVM aobj 131 8K 8K 78643K 137 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 84 0 NDP 18 0K 1K 78643K 121 0 temp 154 5775K 5902K 78643K 23605 0 kqueue 12 18K 28K 78643K 313 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 plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 353 0 350 7 5 2 3 0 8 1 rtentry 112 359 0 262 4 1 3 4 0 8 0 unpcb 144 6529 0 6514 42 37 5 9 0 8 4 syncache 296 35 0 35 10 10 0 1 0 8 0 tcpqe 32 65 0 65 5 5 0 1 0 8 0 tcpcb 776 3377 0 3372 55 44 11 14 0 8 10 arp 120 50 0 33 1 0 1 1 0 8 0 inpcb 368 8236 0 8228 78 67 11 18 0 8 9 nd6 48 78 0 56 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 1 0 1 0 8 0 kcovpl 48 23 0 15 1 0 1 1 0 8 0 mppekey 1024 7 0 7 2 2 0 1 0 8 0 ppxss 1256 109 0 109 8 7 1 1 0 8 1 pppxif 1456 74 0 74 3 2 1 1 0 8 1 pffrag 232 6 0 6 2 2 0 1 0 482 0 pffrnode 88 6 0 6 2 2 0 1 0 8 0 pffrent 40 17 0 17 3 3 0 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 pfstitem 24 149 0 122 1 0 1 1 0 8 0 pfstkey 128 149 0 122 2 0 2 2 0 8 0 pfstate 384 149 0 122 7 2 5 5 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 11 0 11 4 4 0 1 0 8 0 art_heap8 4096 3 0 2 3 2 1 2 0 8 0 art_heap4 256 1798 0 1363 45 17 28 31 0 8 0 art_table 32 1801 0 1365 4 0 4 4 0 8 0 art_node 16 358 0 274 1 0 1 1 0 8 0 sysvmsgpl 40 40 0 0 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 1071 0 1061 1 0 1 1 0 8 0 shmpl 112 134 0 6 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 6032 0 4589 91 0 91 91 0 8 0 ffsino 272 6032 0 4589 97 0 97 97 0 8 0 nchpl 144 10873 0 9225 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 42689 0 42688 3 2 1 2 0 8 0 percpumem 16 176 0 133 1 0 1 1 0 8 0 vmpool 696 12 0 12 3 3 0 1 0 8 0 kstatmem 264 134 0 98 4 1 3 3 0 8 0 scsiplug 72 9 0 9 3 3 0 1 0 8 0 scxspl 216 31648 0 31648 20 19 1 8 0 8 1 plimitpl 152 475 0 459 1 0 1 1 0 8 0 sigapl 424 3941 0 3873 11 3 8 9 0 8 0 futexpl 64 33292 0 33288 3 2 1 1 0 8 0 knotepl 120 517 0 0 12 0 12 12 0 8 0 kqueuepl 216 914 0 906 21 16 5 5 0 8 4 pipepl 320 1246 0 1219 42 39 3 9 0 8 0 fdescpl 496 3901 0 3872 6 2 4 5 0 8 0 filepl 152 34455 0 34216 81 63 18 24 0 8 8 lockfpl 104 885 0 883 3 2 1 2 0 8 0 lockfspl 48 266 0 264 1 0 1 1 0 8 0 sessionpl 144 39 0 22 1 0 1 1 0 8 0 pgrppl 48 423 0 406 1 0 1 1 0 8 0 ucredpl 104 3248 0 3236 1 0 1 1 0 8 0 zombiepl 144 3874 0 3873 2 1 1 1 0 8 0 processpl 1072 3941 0 3873 5 0 5 5 0 8 0 procpl 696 10589 0 10498 13 3 10 11 0 8 1 srpgc 96 20 0 20 7 7 0 1 0 8 0 sosppl 168 51 0 51 7 6 1 1 0 8 1 sockpl 488 15124 0 15096 268 247 21 44 0 8 16 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 11 0 0 2 0 2 2 0 8 0 mcl12k 12288 18 0 0 2 0 2 2 0 8 0 mcl9k 9216 11 0 0 1 0 1 1 0 8 0 mcl8k 8192 15 0 0 2 0 2 2 0 8 0 mcl4k 4096 18 0 0 3 0 3 3 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 357 0 0 42 4 38 42 0 8 0 mtagpl 96 286 0 0 6 0 6 6 0 8 0 mbufpl 256 3973 0 0 244 0 244 244 0 8 0 bufpl 288 9469 0 3144 452 0 452 452 0 8 0 anonpl 24 809856 0 792429 162 20 142 142 0 186 20 amapchunkpl 152 74904 0 74089 42 6 36 41 0 158 0 amappl16 200 7794 0 7263 53 15 38 41 0 8 8 amappl15 192 38 0 37 1 0 1 1 0 8 0 amappl14 184 191 0 178 2 1 1 2 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 596 0 592 1 0 1 1 0 8 0 amappl11 160 49 0 35 1 0 1 1 0 8 0 amappl10 152 60 0 49 1 0 1 1 0 8 0 amappl9 144 966 0 965 2 1 1 1 0 8 0 amappl8 136 297 0 221 3 0 3 3 0 8 0 amappl7 128 183 0 154 2 0 2 2 0 8 0 amappl6 120 245 0 224 2 1 1 2 0 8 0 amappl5 112 230 0 220 1 0 1 1 0 8 0 amappl4 104 671 0 637 2 0 2 2 0 8 0 amappl3 96 11193 0 11134 3 1 2 3 0 8 0 amappl2 88 4407 0 4328 3 1 2 3 0 8 0 amappl1 80 90784 0 89986 25 7 18 23 0 8 0 amappl 88 26247 0 26041 6 0 6 6 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 72 136 0 6 3 0 3 3 0 8 0 uaddrrnd 24 3913 0 3884 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3913 0 3884 1 0 1 1 0 8 0 vmmpekpl 168 37086 0 37016 4 0 4 4 0 8 0 vmmpepl 168 366668 0 363756 231 88 143 162 0 357 8 vmsppl 368 3912 0 3884 4 0 4 4 0 8 0 rwobjpl 56 102933 0 95098 117 2 115 115 0 8 2 pdppl 4096 7833 0 7768 311 242 69 83 0 8 4 pvpl 32 1618357 0 1595081 347 109 238 275 0 265 30 pmappl 248 3912 0 3884 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1396 0 345 31 0 31 31 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82750286) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cb2a3,ffffffff827c8942,308,ffffffff8271d37d) at __assert+0x25 sys/kern/subr_prf.c:157 arptfree(fffffd807e0d0400) at arptfree+0x12e sys/netinet/if_ether.c:776 arptimer(ffffffff82cb10f8) at arptimer+0x88 sys/netinet/if_ether.c:135 timeout_run(ffffffff82cb10f8) at timeout_run+0xcc sys/kern/kern_timeout.c:641 softclock_thread(ffff800021178ae0) at softclock_thread+0x134 sys/kern/kern_timeout.c:765 end trace frame: 0x0, count: -7 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d68ff0) 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 __mp_lock(ffffffff82c98460) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c98460) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvm_fault(fffffd8077e09a20,e16332f000,0,1) at uvm_fault+0x181 sys/uvm/uvm_fault.c:623 upageflttrap(ffff800028159b00,e16332f000) at upageflttrap+0x85 sys/arch/amd64/amd64/trap.c:186 usertrap(ffff800028159b00) at usertrap+0x204 sys/arch/amd64/amd64/trap.c:438 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffe1470, count: 7 ddb{1}> trace x86_ipi_db(ffff800020d68ff0) 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 __mp_lock(ffffffff82c98460) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c98460) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvm_fault(fffffd8077e09a20,e16332f000,0,1) at uvm_fault+0x181 sys/uvm/uvm_fault.c:623 upageflttrap(ffff800028159b00,e16332f000) at upageflttrap+0x85 sys/arch/amd64/amd64/trap.c:186 usertrap(ffff800028159b00) at usertrap+0x204 sys/arch/amd64/amd64/trap.c:438 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffe1470, count: -8