uvm_fault(0xfffffd807effe870, 0x18, 0, 1) -> e kernel: page fault trap, code=0 Stopped at ml_purge+0x21: movq 0(%r14),%r12 ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic kernel page fault uvm_fault(0xfffffd807effe870, 0x18, 0, 1) -> e ml_purge(18) at ml_purge+0x21 sys/kern/uipc_mbuf.c:1615 end trace frame: 0xffff800020bf9670, count: 0 ddb{0}> trace ml_purge(18) at ml_purge+0x21 sys/kern/uipc_mbuf.c:1615 arp_rtrequest() at arp_rtrequest+0x244 arpinvalidate sys/netinet/if_ether.c:698 [inline] arp_rtrequest() at arp_rtrequest+0x244 sys/netinet/if_ether.c:210 rtm_output(ffff8000009fbf00,ffff800020bf97d0,ffff800020bf9720,40,0) at rtm_output+0x3c2 sys/net/rtsock.c:934 route_output(fffffd806482f300,fffffd806f6f2600,0,0) at route_output+0x7d2 sys/net/rtsock.c:814 route_usrreq(fffffd806f6f2600,9,fffffd806482f300,0,0,ffff800020b7d788) at route_usrreq+0x363 sys/net/rtsock.c:271 sosend(fffffd806f6f2600,0,ffff800020bf99c0,0,0,80) at sosend+0x668 sys/kern/uipc_socket.c:513 sendit(ffff800020b7d788,3,ffff800020bf9aa0,0,ffff800020bf9bb0) at sendit+0x52c sys/kern/uipc_syscalls.c:662 sys_sendto(ffff800020b7d788,ffff800020bf9b48,ffff800020bf9bb0) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:527 syscall(ffff800020bf9c20) at syscall+0x552 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020bf9c20) at syscall+0x552 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffffd8,0,6,7836b284010) at Xsyscall+0x128 end of kernel end trace frame: 0x78573bb7fc0, count: -10 ddb{0}> show registers rdi 0xffffffff8132fda1 ml_purge+0x21 rsi 0x272 rbp 0xffff800020bf95e0 rbx 0 rdx 0x273 rcx 0xffff800022e42000 rax 0xffff800022e42000 r8 0xffffffff817caaff arp_rtrequest+0x11f r9 0x5 r10 0x11 r11 0xcc37d0e97ed7f61a r12 0xffff8000001732a8 r13 0x11 r14 0x18 r15 0xffff800000025150 rip 0xffffffff8132fda1 ml_purge+0x21 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800020bf95b0 ss 0x10 ml_purge+0x21: movq 0(%r14),%r12 ddb{0}> show proc PROC (syz-executor.1) pid=175359 stat=onproc flags process=0 proc=4000000 pri=77, usrpri=77, nice=20 forw=0xffffffffffffffff, list=0xffff800020b7c720,0xffffffff82375270 process=0xffff800020b8da58 user=0xffff800020bf4000, vmspace=0xfffffd807effe870 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 79783 349190 53811 0 2 0 syz-executor.1 *79783 175359 53811 0 7 0x4000000 syz-executor.1 47674 108990 0 0 3 0x14200 bored sosplice 53811 127074 21734 0 3 0x82 nanosleep syz-executor.1 21734 364448 75655 0 3 0x82 thrsleep syz-fuzzer 21734 196729 75655 0 3 0x4000082 nanosleep syz-fuzzer 21734 77087 75655 0 3 0x4000082 thrsleep syz-fuzzer 21734 214398 75655 0 7 0x4000002 syz-fuzzer 21734 118989 75655 0 3 0x4000082 thrsleep syz-fuzzer 21734 273109 75655 0 3 0x4000082 thrsleep syz-fuzzer 21734 512911 75655 0 3 0x4000082 thrsleep syz-fuzzer 21734 243444 75655 0 3 0x4000082 kqread syz-fuzzer 21734 142866 75655 0 3 0x4000082 thrsleep syz-fuzzer 21734 221986 75655 0 3 0x4000082 thrsleep syz-fuzzer 75655 188490 6491 0 3 0x10008a pause ksh 6491 394804 36826 0 3 0x92 select sshd 6727 435656 1 0 3 0x100083 ttyin getty 36826 388307 1 0 3 0x80 select sshd 67266 231174 18865 74 3 0x100092 bpf pflogd 18865 246134 1 0 3 0x80 netio pflogd 94411 245666 71238 73 2 0x100090 syslogd 71238 75859 1 0 3 0x100082 netio syslogd 31859 491279 1 77 3 0x100090 poll dhclient 84318 314535 1 0 3 0x80 poll dhclient 34662 173392 0 0 3 0x14200 pgzero zerothread 72827 342833 0 0 3 0x14200 aiodoned aiodoned 71136 80273 0 0 3 0x14200 syncer update 43076 124804 0 0 3 0x14200 cleaner cleaner 82116 370985 0 0 3 0x14200 reaper reaper 61938 416810 0 0 3 0x14200 pgdaemon pagedaemon 37264 466668 0 0 3 0x14200 bored crynlk 93170 316078 0 0 3 0x14200 bored crypto 37359 183990 0 0 3 0x40014200 acpi0 acpi0 80591 410183 0 0 3 0x40014200 idle1 17626 222903 0 0 3 0x14200 bored softnet 72699 390111 0 0 3 0x14200 bored systqmp 2670 507771 0 0 3 0x14200 bored systq 51069 26323 0 0 3 0x40014200 bored softclock 93096 417761 0 0 3 0x40014200 idle0 69456 278905 0 0 3 0x14200 bored smr 1 88212 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 79783 (syz-executor.1) thread 0xffff800020b7d788 (175359) exclusive rwlock netlock r = 0 (0xffffffff8220efe8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1161 #1 rtm_output+0x3ae sys/net/rtsock.c:932 #2 route_output+0x7d2 sys/net/rtsock.c:814 #3 route_usrreq+0x363 sys/net/rtsock.c:271 #4 sosend+0x668 sys/kern/uipc_socket.c:513 #5 sendit+0x52c sys/kern/uipc_syscalls.c:662 #6 sys_sendto+0x80 sys/kern/uipc_syscalls.c:527 #7 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:99 [inline] #7 syscall+0x552 sys/arch/amd64/amd64/trap.c:574 #8 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82382bd0) #0 witness_lock+0x52e sys/kern/subr_witness.c:1161 #1 solock+0x66 sys/kern/uipc_socket2.c:292 #2 sosend+0x52c sys/kern/uipc_socket.c:501 #3 sendit+0x52c sys/kern/uipc_syscalls.c:662 #4 sys_sendto+0x80 sys/kern/uipc_syscalls.c:527 #5 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:99 [inline] #5 syscall+0x552 sys/arch/amd64/amd64/trap.c:574 #6 Xsyscall+0x128 Process 21734 (syz-fuzzer) thread 0xffff800020b85780 (214398) exclusive rrwlock inode r = 0 (0xfffffd807242a928) #0 witness_lock+0x52e sys/kern/subr_witness.c:1161 #1 rw_enter+0x46d sys/kern/kern_rwlock.c:306 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:602 #4 vn_lock+0x6e sys/kern/vfs_vnops.c:549 #5 vget+0x1c3 sys/kern/vfs_subr.c:672 #6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1323 #8 ufs_lookup+0x1575 sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90 #10 vfs_lookup+0x77d sys/kern/vfs_lookup.c:571 #11 namei+0x61c sys/kern/vfs_lookup.c:252 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1762 #13 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:99 [inline] #13 syscall+0x552 sys/arch/amd64/amd64/trap.c:574 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8069a173d0) #0 witness_lock+0x52e sys/kern/subr_witness.c:1161 #1 rw_enter+0x46d sys/kern/kern_rwlock.c:306 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:602 #4 vn_lock+0x6e sys/kern/vfs_vnops.c:549 #5 vfs_lookup+0xe9 sys/kern/vfs_lookup.c:422 #6 namei+0x61c sys/kern/vfs_lookup.c:252 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1762 #8 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:99 [inline] #8 syscall+0x552 sys/arch/amd64/amd64/trap.c:574 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9487 6402K 7050K 78643K 11561 0 0 pcb 26 9K 11K 78643K 399 0 0 rtable 92 3K 4K 78643K 364 0 0 ifaddr 44 11K 12K 78643K 109 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1490 0 0 iov 0 0K 16K 78643K 48 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1207 76K 76K 78643K 1636 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 13 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 1K 78643K 27 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 4 9K 25K 78643K 618 0 0 sigio 0 0K 0K 78643K 6 0 0 proc 54 51K 83K 78643K 410 0 0 subproc 16 1K 2K 78643K 34 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 0K 78643K 43 0 0 in_multi 22 1K 2K 78643K 45 0 0 ether_multi 1 0K 0K 78643K 1 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 54 238K 238K 78643K 54 0 0 exec 0 0K 1K 78643K 241 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 83 12K 22K 78643K 2829 0 0 UVM aobj 32 2K 2K 78643K 34 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 1K 78643K 16 0 0 NDP 8 0K 0K 78643K 27 0 0 temp 96 2726K 2791K 78643K 5004 0 0 kqueue 0 0K 0K 78643K 4 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{0}> 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 inpcbpl 280 235 0 228 1 0 1 1 0 8 0 plimitpl 152 23 0 16 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 49 0 14 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 6 0 6 1 1 0 1 0 8 0 tcpcb 544 88 0 84 1 0 1 1 0 8 0 nd6 48 6 0 3 1 0 1 1 0 8 0 ppxss 1128 11 0 11 4 3 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 16 0 7 1 0 1 1 0 8 0 pfstkey 112 16 0 7 1 0 1 1 0 8 0 pfstate 328 16 0 7 2 0 2 2 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 220 0 44 14 0 14 14 0 8 1 art_table 32 221 0 44 2 0 2 2 0 8 0 art_node 16 46 0 15 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semapl 112 25 0 15 1 0 1 1 0 8 0 shmpl 112 32 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2391 0 969 46 0 46 46 0 8 0 ffsino 272 2391 0 969 96 0 96 96 0 8 0 nchpl 144 3397 0 1758 61 0 61 61 0 8 0 uvmvnodes 72 2667 0 0 49 0 49 49 0 8 0 vnodes 200 2667 0 0 141 0 141 141 0 8 0 namei 1024 9806 0 9806 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scsiplug 64 1 0 1 1 1 0 1 0 8 0 scxspl 192 9844 0 9844 11 10 1 6 0 8 1 sigapl 432 818 0 804 3 1 2 3 0 8 0 futexpl 56 6003 0 6003 1 0 1 1 0 8 1 knotepl 112 145 0 122 1 0 1 1 0 8 0 kqueuepl 104 111 0 109 1 0 1 1 0 8 0 pipepl 112 462 0 447 3 1 2 2 0 8 1 fdescpl 488 819 0 804 4 1 3 3 0 8 0 filepl 152 4294 0 4212 6 0 6 6 0 8 2 lockfpl 104 185 0 185 2 1 1 1 0 8 1 lockfspl 48 67 0 67 2 1 1 1 0 8 1 sessionpl 112 18 0 8 1 0 1 1 0 8 0 pgrppl 48 24 0 14 1 0 1 1 0 8 0 ucredpl 96 895 0 886 1 0 1 1 0 8 0 zombiepl 144 804 0 804 1 0 1 1 0 8 1 processpl 840 835 0 804 4 0 4 4 0 8 0 procpl 600 2048 0 2007 4 0 4 4 0 8 0 srpgc 64 6 0 6 1 0 1 1 0 8 1 sosppl 128 9 0 9 3 3 0 1 0 8 0 sockpl 384 589 0 569 5 1 4 4 0 8 2 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 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 122 0 0 15 0 15 15 0 8 0 mtagpl 80 2 0 0 1 0 1 1 0 8 0 mbufpl 256 267 0 0 15 0 15 15 0 8 0 bufpl 256 7192 0 1193 375 0 375 375 0 8 0 anonpl 16 87770 0 77862 77 20 57 71 0 125 15 amapchunkpl 152 4071 0 3983 6 1 5 6 0 158 1 amappl16 192 4196 0 3669 64 29 35 49 0 8 8 amappl15 184 1 0 1 1 1 0 1 0 8 0 amappl14 176 38 0 35 1 0 1 1 0 8 0 amappl12 160 599 0 595 1 0 1 1 0 8 0 amappl11 152 57 0 39 1 0 1 1 0 8 0 amappl10 144 87 0 83 1 0 1 1 0 8 0 amappl9 136 592 0 589 1 0 1 1 0 8 0 amappl8 128 141 0 126 1 0 1 1 0 8 0 amappl7 120 33 0 29 1 0 1 1 0 8 0 amappl6 112 59 0 52 1 0 1 1 0 8 0 amappl5 104 712 0 697 1 0 1 1 0 8 0 amappl4 96 987 0 960 1 0 1 1 0 8 0 amappl3 88 200 0 189 1 0 1 1 0 8 0 amappl2 80 5681 0 5610 3 1 2 3 0 8 0 amappl1 72 26930 0 26506 25 15 10 20 0 8 0 amappl 80 2302 0 2268 1 0 1 1 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 dma64 64 259 0 259 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 17 0 17 1 1 0 1 0 8 0 aobjpl 64 33 0 2 1 0 1 1 0 8 0 uaddrrnd 24 819 0 804 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 819 0 804 1 0 1 1 0 8 0 vmmpekpl 168 9817 0 9787 2 0 2 2 0 8 0 vmmpepl 168 94045 0 92523 110 26 84 92 0 357 13 vmsppl 360 818 0 804 2 0 2 2 0 8 0 pdppl 4096 1646 0 1608 7 1 6 6 0 8 0 pvpl 32 261153 0 248125 170 26 144 168 0 265 37 pmappl 232 818 0 804 2 1 1 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 536 0 4 16 0 16 16 0 8 0