uvm_fault(0xfffffd80574e0bb8, 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(0xfffffd80574e0bb8, 0x0, 0, 1) -> e ifa_update_broadaddr(ffff800000b29800,ffff800000b2d700,ffff80001e7a9510) at ifa_update_broadaddr+0x1f sys/net/if.c:2968 end trace frame: 0xffff80001e7a9430, count: 0 ddb> trace ifa_update_broadaddr(ffff800000b29800,ffff800000b2d700,ffff80001e7a9510) at ifa_update_broadaddr+0x1f sys/net/if.c:2968 in_ioctl(80206913,ffff80001e7a9500,ffff800000b29800,1) at in_ioctl+0x5eb sys/netinet/in.c:320 ifioctl(fffffd8057c5b040,80206913,ffff80001e7a9500,ffff80001d6c3608) at ifioctl+0xe60 sys/net/if.c:2180 sys_ioctl(ffff80001d6c3608,ffff80001e7a9618,ffff80001e7a9660) at sys_ioctl+0x4a1 syscall(ffff80001e7a96e0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x27cbddf0560, count: -6 ddb> show registers rdi 0xffffffff811e0c4b ifa_update_broadaddr+0x1b rsi 0x45 rbp 0xffff80001e7a9390 rbx 0x10 rdx 0x46 rcx 0xffff80001f9a4000 rax 0xffff80001f9a4000 r8 0xffffffff81ce4437 in_ioctl+0x387 r9 0x7 r10 0x3 r11 0x8f0183d7977466b8 r12 0xffff80001e7a9510 r13 0 r14 0xffff80001e7a9510 r15 0 rip 0xffffffff811e0c4f ifa_update_broadaddr+0x1f cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001e7a9350 ss 0x10 ifa_update_broadaddr+0x1f: movzbl 0(%r15),%r12d ddb> show proc PROC (syz-executor.0) pid=500326 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=61, nice=20 forw=0xffffffffffffffff, list=0xffff80001d6c29d8,0xffffffff827f56e0 process=0xffff80001d6c55d0 user=0xffff80001e7a4000, vmspace=0xfffffd80574e0bb8 estcpu=11, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 72263 141582 66047 0 2 0 syz-executor.0 *72263 500326 66047 0 7 0x4000000 syz-executor.0 66047 23409 990 0 3 0x82 nanosleep syz-executor.0 79107 87204 1 0 3 0x100083 ttyin getty 87571 407388 0 0 3 0x14200 bored sosplice 71454 447003 0 0 3 0x14200 acct acct 59236 360911 990 0 3 0x82 piperd syz-executor.1 990 180057 37462 0 3 0x82 thrsleep syz-fuzzer 990 42280 37462 0 3 0x4000082 nanosleep syz-fuzzer 990 364467 37462 0 2 0x4000002 syz-fuzzer 990 115514 37462 0 3 0x4000082 thrsleep syz-fuzzer 990 275196 37462 0 3 0x4000082 thrsleep syz-fuzzer 990 511032 37462 0 3 0x4000082 thrsleep syz-fuzzer 990 121310 37462 0 3 0x4000082 thrsleep syz-fuzzer 990 491622 37462 0 3 0x4000082 thrsleep syz-fuzzer 37462 439150 74454 0 3 0x10008a pause ksh 74454 297226 81398 0 3 0x92 select sshd 81398 314530 1 0 3 0x80 select sshd 38118 101954 22859 73 3 0x100090 kqread syslogd 22859 420205 1 0 3 0x100082 netio syslogd 4651 26878 1 77 3 0x100090 poll dhclient 36467 435219 1 0 3 0x80 poll dhclient 40956 493814 0 0 3 0x14200 bored smr 7117 172959 0 0 2 0x14200 zerothread 44116 4370 0 0 3 0x14200 aiodoned aiodoned 30569 78590 0 0 3 0x14200 syncer update 68728 442863 0 0 3 0x14200 cleaner cleaner 58158 266881 0 0 3 0x14200 reaper reaper 27565 301902 0 0 3 0x14200 pgdaemon pagedaemon 65834 2909 0 0 3 0x14200 bored crynlk 17556 234695 0 0 3 0x14200 bored crypto 63916 384108 0 0 3 0x40014200 acpi0 acpi0 22828 134605 0 0 3 0x14200 bored softnet 5713 229266 0 0 3 0x14200 bored systqmp 16696 151740 0 0 3 0x14200 bored systq 47685 30526 0 0 3 0x40014200 bored softclock 84681 11729 0 0 3 0x40014200 idle0 1 278546 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 9508 6354K 7062K 78643K 15534 0 pcb 13 8K 8K 78643K 181 0 rtable 105 16K 21K 78643K 885 0 ifaddr 93 18K 19K 78643K 269 0 sysctl 2 0K 0K 78643K 2 0 counters 21 16K 16K 78643K 27 0 ioctlops 0 0K 4K 78643K 438 0 iov 0 0K 16K 78643K 114 0 mount 1 1K 1K 78643K 1 0 vnodes 1220 77K 77K 78643K 2446 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 18 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 308 0 dirhash 6 1K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 5 13K 25K 78643K 1678 0 sigio 0 0K 0K 78643K 12 0 proc 51 38K 63K 78643K 491 0 subproc 32 2K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 89 0 in_multi 81 4K 4K 78643K 214 0 ether_multi 1 0K 0K 78643K 32 0 mrt 0 0K 0K 78643K 7 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 301 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 156 89K 89K 78643K 4540 0 UVM aobj 47 7K 7K 78643K 51 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 1K 78643K 582 0 NDP 13 0K 0K 78643K 30 0 temp 137 3866K 3930K 78643K 11834 0 kqueue 3 4K 11K 78643K 49 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 11 0 6 1 0 1 1 0 8 0 rtpcb 80 69 0 67 1 0 1 1 0 8 0 rtentry 112 95 0 65 2 0 2 2 0 8 0 unpcb 120 645 0 635 1 0 1 1 0 8 0 syncache 264 14 0 14 6 6 0 1 0 8 0 tcpqe 32 84 0 84 2 2 0 1 0 8 0 tcpcb 544 2022 0 2017 1 0 1 1 0 8 0 ipq 40 3 0 3 2 2 0 1 0 8 0 ipqe 40 10 0 10 2 2 0 1 0 8 0 inpcb 296 3537 0 3528 10 9 1 2 0 8 0 rttmr 72 3 0 3 1 1 0 1 0 8 0 ip6q 72 2 0 2 2 2 0 1 0 8 0 ip6af 40 2 0 2 1 1 0 1 0 8 0 nd6 48 26 0 21 1 0 1 1 0 8 0 pkpcb 40 6 0 6 3 3 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1136 2 0 2 2 2 0 1 0 8 0 pfosfp 40 1 0 0 1 0 1 1 0 8 0 pfosfpen 112 2 0 0 1 0 1 1 0 8 0 pfrktable 1344 234 0 224 9 8 1 2 0 8 0 pftag 88 41 0 39 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 112 2 0 0 1 0 1 1 0 8 0 pfstate 328 1 0 0 1 0 1 1 0 8 0 pfrule 1360 59 0 44 8 6 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 485 0 339 18 7 11 16 0 8 0 art_table 32 486 0 339 4 2 2 3 0 8 0 art_node 16 94 0 70 1 0 1 1 0 8 0 sysvmsgpl 40 56 0 22 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 302 0 292 1 0 1 1 0 8 0 shmpl 112 48 0 4 2 0 2 2 0 8 0 dirhash 1024 17 0 13 3 1 2 3 0 8 0 dino2pl 256 3346 0 1953 88 0 88 88 0 8 0 ffsino 240 3346 0 1953 83 0 83 83 0 8 0 nchpl 144 5761 0 4183 60 0 60 60 0 8 0 uvmvnodes 72 4518 0 0 83 0 83 83 0 8 0 vnodes 208 4518 0 0 238 0 238 238 0 8 0 namei 1024 15898 0 15898 4 3 1 1 0 8 1 vcpupl 1984 7 0 0 1 0 1 1 0 8 0 vmpool 528 7 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 85 0 77 1 0 1 1 0 8 0 scsiplug 64 5 0 5 4 4 0 1 0 8 0 scxspl 192 16331 0 16331 3 2 1 1 0 8 1 plimitpl 152 109 0 102 1 0 1 1 0 8 0 sigapl 424 1864 0 1834 4 0 4 4 0 8 0 futexpl 56 35386 0 35386 4 3 1 1 0 8 1 knotepl 112 131 0 112 1 0 1 1 0 8 0 kqueuepl 144 150 0 147 1 0 1 1 0 8 0 pipepl 272 263 0 253 1 0 1 1 0 8 0 fdescpl 432 1848 0 1834 2 0 2 2 0 8 0 filepl 120 11015 0 10914 6 2 4 4 0 8 0 lockfpl 104 205 0 204 1 0 1 1 0 8 0 lockfspl 48 79 0 78 1 0 1 1 0 8 0 sessionpl 112 19 0 9 1 0 1 1 0 8 0 pgrppl 48 29 0 19 1 0 1 1 0 8 0 ucredpl 96 925 0 918 1 0 1 1 0 8 0 zombiepl 144 1834 0 1834 2 1 1 1 0 8 1 processpl 928 1864 0 1834 4 0 4 4 0 8 0 procpl 624 3716 0 3678 4 0 4 4 0 8 0 sosppl 128 9 0 9 5 5 0 1 0 8 0 sockpl 400 4260 0 4239 9 6 3 4 0 8 0 mcl64k 65536 59 0 59 9 9 0 1 0 8 0 mcl16k 16384 10 0 10 3 3 0 1 0 8 0 mcl12k 12288 39 0 39 11 11 0 1 0 8 0 mcl9k 9216 14 0 14 9 9 0 1 0 8 0 mcl8k 8192 45 0 45 11 11 0 1 0 8 0 mcl4k 4096 121 0 121 8 8 0 1 0 8 0 mcl2k2 2112 9 0 9 6 6 0 1 0 8 0 mcl2k 2048 97054 0 96992 19 10 9 14 0 8 0 mtagpl 96 707 0 400 12 4 8 10 0 8 0 mbufpl 256 162014 0 161273 70 21 49 64 0 8 0 bufpl 280 6914 0 1562 383 0 383 383 0 8 0 anonpl 16 190270 0 172446 149 71 78 93 0 107 0 amapchunkpl 152 7225 0 7092 27 20 7 16 0 158 0 amappl16 192 9022 0 7935 102 47 55 67 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 492 0 482 1 0 1 1 0 8 0 amappl13 168 41 0 37 1 0 1 1 0 8 0 amappl12 160 14 0 12 1 0 1 1 0 8 0 amappl11 152 47 0 38 1 0 1 1 0 8 0 amappl10 144 273 0 269 1 0 1 1 0 8 0 amappl9 136 1255 0 1253 1 0 1 1 0 8 0 amappl8 128 395 0 339 2 0 2 2 0 8 0 amappl7 120 373 0 360 1 0 1 1 0 8 0 amappl6 112 27 0 21 1 0 1 1 0 8 0 amappl5 104 1855 0 1843 1 0 1 1 0 8 0 amappl4 96 452 0 422 1 0 1 1 0 8 0 amappl3 88 622 0 614 1 0 1 1 0 8 0 amappl2 80 13912 0 13843 2 0 2 2 0 8 0 amappl1 72 50348 0 49931 22 13 9 17 0 8 0 amappl 80 3972 0 3926 2 0 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 50 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1855 0 1834 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1855 0 1834 1 0 1 1 0 8 0 vmmpekpl 168 13319 0 13288 2 0 2 2 0 8 0 vmmpepl 168 228586 0 226302 173 71 102 137 0 357 0 vmsppl 272 1854 0 1834 2 0 2 2 0 8 0 pdppl 4096 3716 0 3675 8 2 6 6 0 8 0 pvpl 32 517908 0 497791 365 138 227 260 0 265 53 pmappl 200 1854 0 1834 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 352 0 89 9 0 9 9 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ifa_update_broadaddr(ffff800000b29800,ffff800000b2d700,ffff80001e7a9510) at ifa_update_broadaddr+0x1f sys/net/if.c:2968 in_ioctl(80206913,ffff80001e7a9500,ffff800000b29800,1) at in_ioctl+0x5eb sys/netinet/in.c:320 ifioctl(fffffd8057c5b040,80206913,ffff80001e7a9500,ffff80001d6c3608) at ifioctl+0xe60 sys/net/if.c:2180 sys_ioctl(ffff80001d6c3608,ffff80001e7a9618,ffff80001e7a9660) at sys_ioctl+0x4a1 syscall(ffff80001e7a96e0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x27cbddf0560, count: -6 ddb> machine ddbcpu 1 No such command ddb> trace ifa_update_broadaddr(ffff800000b29800,ffff800000b2d700,ffff80001e7a9510) at ifa_update_broadaddr+0x1f sys/net/if.c:2968 in_ioctl(80206913,ffff80001e7a9500,ffff800000b29800,1) at in_ioctl+0x5eb sys/netinet/in.c:320 ifioctl(fffffd8057c5b040,80206913,ffff80001e7a9500,ffff80001d6c3608) at ifioctl+0xe60 sys/net/if.c:2180 sys_ioctl(ffff80001d6c3608,ffff80001e7a9618,ffff80001e7a9660) at sys_ioctl+0x4a1 syscall(ffff80001e7a96e0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x27cbddf0560, count: -6