uvm_fault(0xfffffd807effd870, 0x18, 0, 1) -> e kernel: page fault trap, code=0 Stopped at ml_purge+0x21: movq 0(%r14),%r12 ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic kernel page fault uvm_fault(0xfffffd807effd870, 0x18, 0, 1) -> e ml_purge(18) at ml_purge+0x21 sys/kern/uipc_mbuf.c:1615 end trace frame: 0xffff800021a30c30, count: 0 ddb{1}> 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(ffff800000a01400,ffff800021a30d90,ffff800021a30ce0,40,0) at rtm_output+0x3c2 sys/net/rtsock.c:934 route_output(fffffd806f092a00,fffffd8065809330,0,0) at route_output+0x7d2 sys/net/rtsock.c:814 route_usrreq(fffffd8065809330,9,fffffd806f092a00,0,0,ffff800020b392d8) at route_usrreq+0x363 sys/net/rtsock.c:271 sosend(fffffd8065809330,0,ffff800021a30f80,0,0,80) at sosend+0x668 sys/kern/uipc_socket.c:513 sendit(ffff800020b392d8,4,ffff800021a31060,0,ffff800021a31170) at sendit+0x52c sys/kern/uipc_syscalls.c:662 sys_sendto(ffff800020b392d8,ffff800021a31108,ffff800021a31170) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:527 syscall(ffff800021a311e0) at syscall+0x552 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800021a311e0) at syscall+0x552 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffffd8,0,6,ca477255010) at Xsyscall+0x128 end of kernel end trace frame: 0xca6d0f21440, count: -10 ddb{1}> show registers rdi 0xffffffff8139f3f1 ml_purge+0x21 rsi 0x2d2 rbp 0xffff800021a30ba0 rbx 0 rdx 0x2d3 rcx 0xffff800021e32000 rax 0xffff800021e32000 r8 0xffffffff816754cf arp_rtrequest+0x11f r9 0x5 r10 0x11 r11 0xa7c13eb9e6b25b9d r12 0xffff8000001732a8 r13 0x11 r14 0x18 r15 0xffff800000a16220 rip 0xffffffff8139f3f1 ml_purge+0x21 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800021a30b70 ss 0x10 ml_purge+0x21: movq 0(%r14),%r12 ddb{1}> show proc PROC (syz-executor.0) pid=187943 stat=onproc flags process=1000 proc=4080000 pri=83, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff800020b38270,0xffffffff82351118 process=0xffff800020b8c390 user=0xffff800021a2c000, vmspace=0xfffffd807effd870 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 75337 97450 41765 0 3 0x3000 suspend syz-executor.0 *75337 187943 41765 0 7 0x4081000 syz-executor.0 41765 431802 78309 0 3 0x82 nanosleep syz-executor.0 51173 175468 78309 0 3 0x82 nanosleep syz-executor.1 75380 521838 1 0 3 0x100083 ttyin getty 81096 339444 0 0 3 0x14200 bored sosplice 78309 243913 70140 0 3 0x82 thrsleep syz-fuzzer 78309 154914 70140 0 3 0x4000082 thrsleep syz-fuzzer 78309 150729 70140 0 3 0x4000082 thrsleep syz-fuzzer 78309 383980 70140 0 3 0x4000082 thrsleep syz-fuzzer 78309 60445 70140 0 3 0x4000082 thrsleep syz-fuzzer 78309 475964 70140 0 3 0x4000082 thrsleep syz-fuzzer 78309 86658 70140 0 3 0x4000082 thrsleep syz-fuzzer 78309 425260 70140 0 3 0x4000082 thrsleep syz-fuzzer 78309 145695 70140 0 3 0x4000082 thrsleep syz-fuzzer 78309 303710 70140 0 3 0x4000082 kqread syz-fuzzer 70140 283780 84073 0 3 0x10008a pause ksh 84073 427027 79041 0 3 0x92 select sshd 79041 148661 1 0 3 0x80 select sshd 44681 3772 63287 74 3 0x100092 bpf pflogd 63287 170148 1 0 3 0x80 netio pflogd 63153 205922 50895 73 2 0x100090 syslogd 50895 352403 1 0 3 0x100082 netio syslogd 82111 433159 1 77 3 0x100090 poll dhclient 27425 2184 1 0 3 0x80 poll dhclient 83988 145268 0 0 3 0x14200 pgzero zerothread 99542 147728 0 0 3 0x14200 aiodoned aiodoned 22051 276423 0 0 3 0x14200 syncer update 48494 255208 0 0 3 0x14200 cleaner cleaner 67506 172966 0 0 3 0x14200 reaper reaper 30354 89896 0 0 3 0x14200 pgdaemon pagedaemon 13447 251558 0 0 3 0x14200 bored crynlk 79283 487224 0 0 3 0x14200 bored crypto 7389 503559 0 0 3 0x40014200 acpi0 acpi0 81848 436738 0 0 3 0x40014200 idle1 23330 319651 0 0 3 0x14200 bored softnet 71854 118121 0 0 3 0x14200 bored systqmp 70474 148774 0 0 3 0x14200 bored systq 38176 463457 0 0 3 0x40014200 bored softclock 91299 331754 0 0 7 0x40014200 idle0 43028 496392 0 0 3 0x14200 bored smr 1 298677 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 75337 (syz-executor.0) thread 0xffff800020b392d8 (187943) exclusive rwlock netlock r = 0 (0xffffffff821a1838) #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 (0xffffffff8234fde0) #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9521 6426K 7201K 78643K 15848 0 0 pcb 27 9K 11K 78643K 3702 0 0 rtable 449 29K 29K 78643K 4945 0 0 ifaddr 60 14K 14K 78643K 234 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1559 0 0 iov 0 0K 24K 78643K 215 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1202 76K 76K 78643K 3299 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 27 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 0K 78643K 170 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 5 13K 25K 78643K 3954 0 0 sigio 0 0K 0K 78643K 48 0 0 proc 54 51K 83K 78643K 683 0 0 subproc 32 2K 2K 78643K 85 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 231 0 0 in_multi 33 2K 2K 78643K 223 0 0 ether_multi 1 0K 0K 78643K 32 0 0 mrt 0 0K 0K 78643K 17 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 66 291K 291K 78643K 66 0 0 exec 0 0K 1K 78643K 352 0 0 pfkey data 0 0K 4K 78643K 2 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 97 21K 30K 78643K 12018 0 0 UVM aobj 91 3K 3K 78643K 101 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 0K 78643K 104 0 0 NDP 12 0K 0K 78643K 65 0 0 temp 172 2735K 2803K 78643K 13870 0 0 kqueue 0 0K 0K 78643K 22 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 12 0 6 1 0 1 1 0 8 0 inpcbpl 280 927 0 920 1 0 1 1 0 8 0 plimitpl 152 85 0 77 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 1050 0 860 6 0 6 6 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 sackhl 24 3 0 3 2 2 0 1 0 8 0 tcpcb 544 370 0 366 1 0 1 1 0 8 0 rttmr 72 8 0 8 2 2 0 1 0 8 0 nd6 48 15 0 9 1 0 1 1 0 8 0 ppxss 1128 33 0 33 8 8 0 1 0 8 0 pffrag 232 3 0 3 2 2 0 1 0 482 0 pffrnode 88 3 0 3 2 2 0 1 0 8 0 pffrent 40 8 0 8 2 2 0 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 pfstitem 24 40 0 38 1 0 1 1 0 8 0 pfstkey 112 40 0 38 1 0 1 1 0 8 0 pfstate 328 40 0 38 2 1 1 2 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 17 0 0 17 0 17 17 0 8 0 art_heap4 256 457 0 247 15 1 14 14 0 8 0 art_table 32 474 0 247 2 0 2 2 0 8 0 art_node 16 247 0 187 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 3 1 0 1 1 0 8 0 semapl 112 168 0 158 1 0 1 1 0 8 0 shmpl 112 99 0 10 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 6667 0 5237 47 0 47 47 0 8 0 ffsino 272 6667 0 5237 96 0 96 96 0 8 0 nchpl 144 11681 0 10052 61 0 61 61 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 200 5926 0 0 312 0 312 312 0 8 0 namei 1024 32170 0 32170 4 3 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scsiplug 64 4 0 4 3 3 0 1 0 8 0 scxspl 192 34070 0 34070 15 14 1 6 0 8 1 sigapl 432 4146 0 4131 4 2 2 3 0 8 0 futexpl 56 28941 0 28941 2 1 1 1 0 8 1 knotepl 112 485 0 466 1 0 1 1 0 8 0 kqueuepl 104 451 0 449 1 0 1 1 0 8 0 pipepl 112 1356 0 1337 4 3 1 2 0 8 0 fdescpl 488 4147 0 4131 4 1 3 3 0 8 0 filepl 152 18290 0 18189 10 5 5 7 0 8 1 lockfpl 104 684 0 684 5 5 0 1 0 8 0 lockfspl 48 247 0 247 5 5 0 1 0 8 0 sessionpl 112 22 0 11 1 0 1 1 0 8 0 pgrppl 48 45 0 34 1 0 1 1 0 8 0 ucredpl 96 2857 0 2848 1 0 1 1 0 8 0 zombiepl 144 4131 0 4130 3 2 1 1 0 8 0 processpl 888 4163 0 4130 4 0 4 4 0 8 0 procpl 600 11075 0 11032 6 2 4 5 0 8 0 srpgc 64 22 0 22 4 4 0 1 0 8 0 sosppl 128 34 0 34 9 9 0 1 0 8 0 sockpl 384 4525 0 4504 7 4 3 4 0 8 0 mcl64k 65536 15 0 0 2 0 2 2 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 18 0 0 2 0 2 2 0 8 0 mcl9k 9216 16 0 0 2 0 2 2 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 11 0 0 2 0 2 2 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 139 0 0 13 0 13 13 0 8 0 mtagpl 80 2 0 0 1 0 1 1 0 8 0 mbufpl 256 343 0 0 11 0 11 11 0 8 0 bufpl 256 11341 0 4333 439 0 439 439 0 8 0 anonpl 16 319435 0 309260 120 78 42 57 0 125 0 amapchunkpl 152 19661 0 19553 23 18 5 9 0 158 0 amappl16 192 18835 0 18284 96 68 28 39 0 8 0 amappl14 176 65 0 62 2 1 1 1 0 8 0 amappl13 168 1622 0 1622 1 1 0 1 0 8 0 amappl12 160 918 0 915 1 0 1 1 0 8 0 amappl11 152 981 0 960 1 0 1 1 0 8 0 amappl10 144 80 0 77 1 0 1 1 0 8 0 amappl9 136 1090 0 1086 1 0 1 1 0 8 0 amappl8 128 630 0 614 1 0 1 1 0 8 0 amappl7 120 49 0 42 1 0 1 1 0 8 0 amappl6 112 965 0 958 1 0 1 1 0 8 0 amappl5 104 1057 0 1041 1 0 1 1 0 8 0 amappl4 96 4388 0 4358 2 1 1 2 0 8 0 amappl3 88 1140 0 1129 1 0 1 1 0 8 0 amappl2 80 32247 0 32177 4 2 2 3 0 8 0 amappl1 72 94505 0 94069 25 15 10 20 0 8 0 amappl 80 11369 0 11332 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 64 100 0 10 2 0 2 2 0 8 0 uaddrrnd 24 4147 0 4131 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4147 0 4131 1 0 1 1 0 8 0 vmmpekpl 168 28077 0 28047 2 0 2 2 0 8 0 vmmpepl 168 432362 0 430761 154 79 75 89 0 357 0 vmsppl 360 4146 0 4131 2 0 2 2 0 8 0 pdppl 4096 8302 0 8262 7 1 6 6 0 8 0 pvpl 32 927165 0 913756 232 122 110 144 0 265 1 pmappl 232 4146 0 4131 3 2 1 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 616 0 8 18 0 18 18 0 8 0