uvm_fault(0xfffffd806a5dd890, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at ifa_update_broadaddr+0x1f: movzbl 0(%r15),%r12d ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic kernel page fault uvm_fault(0xfffffd806a5dd890, 0x0, 0, 1) -> e ifa_update_broadaddr(ffff800000ac6000,ffff800000ae2f00,ffff8000209c9b00) at ifa_update_broadaddr+0x1f sys/net/if.c:3073 end trace frame: 0xffff8000209c9a20, count: 0 ddb> trace ifa_update_broadaddr(ffff800000ac6000,ffff800000ae2f00,ffff8000209c9b00) at ifa_update_broadaddr+0x1f sys/net/if.c:3073 in_ioctl(80206913,ffff8000209c9af0,ffff800000ac6000,1) at in_ioctl+0x5eb sys/netinet/in.c:320 ifioctl(fffffd805732b978,80206913,ffff8000209c9af0,ffff80001d6c2508) at ifioctl+0xe60 sys/net/if.c:2285 sys_ioctl(ffff80001d6c2508,ffff8000209c9c08,ffff8000209c9c50) at sys_ioctl+0x4a1 syscall(ffff8000209c9cd0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a25fdd2f00, count: -6 ddb> show registers rdi 0xffffffff819b006b ifa_update_broadaddr+0x1b rsi 0x84 rbp 0xffff8000209c9980 rbx 0x10 rdx 0x85 rcx 0xffff80001e9a6000 rax 0xffff80001e9a6000 r8 0xffffffff810f9ea7 in_ioctl+0x387 r9 0x7 r10 0x3 r11 0xfb1f7fdc7643c177 r12 0xffff8000209c9b00 r13 0 r14 0xffff8000209c9b00 r15 0 rip 0xffffffff819b006f ifa_update_broadaddr+0x1f cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000209c9940 ss 0x10 ifa_update_broadaddr+0x1f: movzbl 0(%r15),%r12d ddb> show proc PROC (syz-executor.0) pid=79179 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff80001d6c3138,0xffffffff828503c8 process=0xffff80001d6c55d0 user=0xffff8000209c4000, vmspace=0xfffffd806a5dd890 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 46245 170174 79804 0 2 0 syz-executor.0 *46245 79179 79804 0 7 0x4000000 syz-executor.0 3477 18782 0 0 3 0x14200 acct acct 79804 255043 40664 0 3 0x82 nanosleep syz-executor.0 88181 191641 0 0 3 0x14200 bored sosplice 96833 264484 40664 0 3 0x82 piperd syz-executor.1 40664 393510 67170 0 3 0x82 thrsleep syz-fuzzer 40664 478839 67170 0 3 0x4000082 nanosleep syz-fuzzer 40664 420241 67170 0 3 0x4000082 thrsleep syz-fuzzer 40664 254316 67170 0 3 0x4000082 thrsleep syz-fuzzer 40664 421976 67170 0 3 0x4000082 thrsleep syz-fuzzer 40664 17976 67170 0 3 0x4000082 thrsleep syz-fuzzer 40664 482345 67170 0 3 0x4000082 thrsleep syz-fuzzer 40664 451663 67170 0 2 0x4000002 syz-fuzzer 67170 452540 9675 0 3 0x10008a pause ksh 9675 274320 51668 0 3 0x92 select sshd 68947 85990 1 0 3 0x100083 ttyin getty 51668 422327 1 0 3 0x80 select sshd 99768 98735 50984 73 3 0x100090 kqread syslogd 50984 250415 1 0 3 0x100082 netio syslogd 31197 381772 1 77 3 0x100090 poll dhclient 66649 462732 1 0 3 0x80 poll dhclient 98844 397672 0 0 3 0x14200 bored smr 69917 131205 0 0 2 0x14200 zerothread 2818 361368 0 0 3 0x14200 aiodoned aiodoned 45166 190490 0 0 3 0x14200 syncer update 19685 41850 0 0 3 0x14200 cleaner cleaner 96283 127049 0 0 3 0x14200 reaper reaper 38373 100926 0 0 3 0x14200 pgdaemon pagedaemon 43269 294325 0 0 3 0x14200 bored crynlk 35457 92171 0 0 3 0x14200 bored crypto 59839 479540 0 0 3 0x40014200 acpi0 acpi0 13291 52523 0 0 3 0x14200 bored softnet 89522 319632 0 0 3 0x14200 bored systqmp 11993 384305 0 0 3 0x14200 bored systq 49451 316927 0 0 3 0x40014200 bored softclock 60265 501412 0 0 3 0x40014200 idle0 1 110849 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9523 6352K 6842K 78643K 11937 0 pcb 13 8K 8K 78643K 257 0 rtable 156 27K 27K 78643K 1129 0 ifaddr 131 28K 28K 78643K 424 0 sysctl 2 0K 0K 78643K 2 0 counters 21 16K 16K 78643K 46 0 ioctlops 0 0K 4K 78643K 1210 0 iov 0 0K 16K 78643K 213 0 mount 1 1K 1K 78643K 1 0 vnodes 1218 77K 77K 78643K 1703 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 34 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 1K 78643K 300 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 5 13K 25K 78643K 2229 0 sigio 0 0K 0K 78643K 24 0 proc 53 39K 63K 78643K 542 0 subproc 32 2K 2K 78643K 68 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 102 0 in_multi 169 6K 7K 78643K 375 0 ether_multi 1 0K 0K 78643K 35 0 mrt 1 0K 0K 78643K 5 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 67 307K 307K 78643K 67 0 exec 0 0K 1K 78643K 413 0 pfkey data 0 0K 1K 78643K 2 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 158 106K 109K 78643K 5781 0 UVM aobj 82 5K 5K 78643K 99 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 200 0 NDP 14 0K 0K 78643K 63 0 temp 157 3894K 3958K 78643K 27856 0 kqueue 3 4K 16K 78643K 61 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 17 0 7 1 0 1 1 0 8 0 rtpcb 80 98 0 95 1 0 1 1 0 8 0 rtentry 112 162 0 129 2 0 2 2 0 8 0 unpcb 120 1002 0 992 1 0 1 1 0 8 0 syncache 264 31 0 31 13 13 0 1 0 8 0 tcpqe 32 385 0 385 3 3 0 1 0 8 0 tcpcb 544 1100 0 1095 1 0 1 1 0 8 0 ipq 40 4 0 4 3 3 0 1 0 8 0 ipqe 40 94 0 94 3 3 0 1 0 8 0 inpcb 296 2080 0 2070 10 9 1 2 0 8 0 rttmr 72 4 0 3 3 2 1 1 0 8 0 ip6q 72 2 0 2 2 2 0 1 0 8 0 ip6af 40 4 0 4 2 2 0 1 0 8 0 nd6 48 36 0 32 1 0 1 1 0 8 0 pkpcb 40 8 0 8 3 3 0 1 0 8 0 ppxss 1136 3 0 3 3 3 0 1 0 8 0 pfstscr 40 2 0 1 1 0 1 1 0 8 0 pfosfp 40 3 0 0 1 0 1 1 0 8 0 pfosfpen 112 5 0 0 1 0 1 1 0 8 0 pfrke_plain 160 20 0 0 1 0 1 1 0 8 0 pfrktable 1344 207 0 179 11 8 3 3 0 8 0 pftag 88 43 0 38 3 2 1 1 0 8 0 pfqueue 264 2 0 2 1 1 0 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 112 4 0 2 1 0 1 1 0 8 0 pfstate 328 2 0 1 1 0 1 1 0 8 0 pfrule 1360 536 0 117 37 2 35 35 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 788 0 624 16 4 12 14 0 8 0 art_table 32 789 0 624 2 0 2 2 0 8 0 art_node 16 143 0 114 1 0 1 1 0 8 0 sysvmsgpl 40 47 0 31 3 2 1 1 0 8 0 semapl 112 296 0 286 1 0 1 1 0 8 0 shmpl 112 96 0 17 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 4104 0 2709 88 0 88 88 0 8 0 ffsino 240 4104 0 2709 83 0 83 83 0 8 0 nchpl 144 7382 0 5805 60 0 60 60 0 8 0 rtmask 32 8 0 4 1 0 1 1 0 8 0 uvmvnodes 72 4438 0 0 81 0 81 81 0 8 0 vnodes 208 4438 0 0 234 0 234 234 0 8 0 namei 1024 22076 0 22076 6 5 1 1 0 8 1 vcpupl 1984 12 0 0 2 0 2 2 0 8 0 vmpool 528 16 0 4 1 0 1 1 0 8 0 pfiaddrpl 120 482 0 120 12 1 11 11 0 8 0 scsiplug 64 2 0 2 1 1 0 1 0 8 0 scxspl 192 21528 0 21528 2 1 1 1 0 8 1 plimitpl 152 125 0 118 1 0 1 1 0 8 0 sigapl 424 2412 0 2382 4 0 4 4 0 8 0 futexpl 56 40179 0 40179 6 5 1 1 0 8 1 knotepl 112 157 0 138 1 0 1 1 0 8 0 kqueuepl 144 200 0 195 1 0 1 1 0 8 0 pipepl 272 1624 0 1614 13 12 1 2 0 8 0 fdescpl 432 2395 0 2381 2 0 2 2 0 8 0 filepl 120 15949 0 15851 6 2 4 4 0 8 1 lockfpl 104 326 0 325 1 0 1 1 0 8 0 lockfspl 48 108 0 107 1 0 1 1 0 8 0 sessionpl 112 19 0 9 1 0 1 1 0 8 0 pgrppl 48 49 0 39 1 0 1 1 0 8 0 ucredpl 96 1301 0 1294 1 0 1 1 0 8 0 zombiepl 144 2382 0 2382 3 2 1 1 0 8 1 processpl 928 2412 0 2382 4 0 4 4 0 8 0 procpl 624 4907 0 4869 6 2 4 4 0 8 0 sosppl 128 18 0 18 6 6 0 1 0 8 0 sockpl 400 3190 0 3168 12 9 3 4 0 8 0 mcl64k 65536 623 0 623 44 44 0 33 0 8 0 mcl16k 16384 8 0 8 6 6 0 1 0 8 0 mcl12k 12288 62 0 62 12 11 1 1 0 8 1 mcl9k 9216 23 0 23 11 11 0 1 0 8 0 mcl8k 8192 64 0 64 11 11 0 1 0 8 0 mcl4k 4096 160 0 160 13 12 1 1 0 8 1 mcl2k2 2112 9 0 9 6 6 0 1 0 8 0 mcl2k 2048 95953 0 95900 25 17 8 17 0 8 0 mtagpl 96 87 0 56 3 1 2 2 0 8 0 mbufpl 256 164263 0 164051 50 29 21 26 0 8 0 bufpl 280 7297 0 1945 383 0 383 383 0 8 0 anonpl 16 223206 0 205499 108 27 81 87 0 107 0 amapchunkpl 152 9882 0 9724 30 21 9 20 0 158 0 amappl16 192 11140 0 10050 88 33 55 67 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 157 0 150 1 0 1 1 0 8 0 amappl13 168 415 0 411 1 0 1 1 0 8 0 amappl12 160 6 0 6 1 1 0 1 0 8 0 amappl11 152 53 0 44 1 0 1 1 0 8 0 amappl10 144 174 0 168 1 0 1 1 0 8 0 amappl9 136 1907 0 1903 1 0 1 1 0 8 0 amappl8 128 1929 0 1880 2 0 2 2 0 8 0 amappl7 120 271 0 257 1 0 1 1 0 8 0 amappl6 112 24 0 19 1 0 1 1 0 8 0 amappl5 104 2337 0 2325 1 0 1 1 0 8 0 amappl4 96 828 0 801 1 0 1 1 0 8 0 amappl3 88 299 0 293 1 0 1 1 0 8 0 amappl2 80 18423 0 18356 2 0 2 2 0 8 0 amappl1 72 60972 0 60561 24 15 9 17 0 8 0 amappl 80 5200 0 5143 3 1 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 98 0 17 2 0 2 2 0 8 0 uaddrrnd 24 2411 0 2385 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2411 0 2385 1 0 1 1 0 8 0 vmmpekpl 168 20717 0 20685 2 0 2 2 0 8 0 vmmpepl 168 292392 0 290165 222 123 99 151 0 357 1 vmsppl 272 2410 0 2385 3 1 2 2 0 8 0 pdppl 4096 4828 0 4782 8 2 6 7 0 8 0 pvpl 32 600346 0 579629 236 50 186 203 0 265 0 pmappl 200 2410 0 2385 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 428 0 158 8 0 8 8 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ifa_update_broadaddr(ffff800000ac6000,ffff800000ae2f00,ffff8000209c9b00) at ifa_update_broadaddr+0x1f sys/net/if.c:3073 in_ioctl(80206913,ffff8000209c9af0,ffff800000ac6000,1) at in_ioctl+0x5eb sys/netinet/in.c:320 ifioctl(fffffd805732b978,80206913,ffff8000209c9af0,ffff80001d6c2508) at ifioctl+0xe60 sys/net/if.c:2285 sys_ioctl(ffff80001d6c2508,ffff8000209c9c08,ffff8000209c9c50) at sys_ioctl+0x4a1 syscall(ffff8000209c9cd0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a25fdd2f00, count: -6 ddb> machine ddbcpu 1 No such command ddb> trace ifa_update_broadaddr(ffff800000ac6000,ffff800000ae2f00,ffff8000209c9b00) at ifa_update_broadaddr+0x1f sys/net/if.c:3073 in_ioctl(80206913,ffff8000209c9af0,ffff800000ac6000,1) at in_ioctl+0x5eb sys/netinet/in.c:320 ifioctl(fffffd805732b978,80206913,ffff8000209c9af0,ffff80001d6c2508) at ifioctl+0xe60 sys/net/if.c:2285 sys_ioctl(ffff80001d6c2508,ffff8000209c9c08,ffff8000209c9c50) at sys_ioctl+0x4a1 syscall(ffff8000209c9cd0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a25fdd2f00, count: -6