uvm_fault(0xfffffd806b42bef0, 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(0xfffffd806b42bef0, 0x0, 0, 1) -> e ifa_update_broadaddr(ffff800000ac6800,ffff800000ae5100,ffff80001d757960) at ifa_update_broadaddr+0x1f sys/net/if.c:2969 end trace frame: 0xffff80001d757880, count: 0 ddb> trace ifa_update_broadaddr(ffff800000ac6800,ffff800000ae5100,ffff80001d757960) at ifa_update_broadaddr+0x1f sys/net/if.c:2969 in_ioctl(80206913,ffff80001d757950,ffff800000ac6800,1) at in_ioctl+0x5eb sys/netinet/in.c:320 ifioctl(fffffd8053a66b08,80206913,ffff80001d757950,ffff80001e7f6500) at ifioctl+0xe60 sys/net/if.c:2181 sys_ioctl(ffff80001e7f6500,ffff80001d757a68,ffff80001d757ab0) at sys_ioctl+0x4a1 syscall(ffff80001d757b30) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf1cb421bcb0, count: -6 ddb> show registers rdi 0xffffffff81a094fb ifa_update_broadaddr+0x1b rsi 0x4b rbp 0xffff80001d7577e0 rbx 0x10 rdx 0x4c rcx 0xffff80001f9a4000 rax 0xffff80001f9a4000 r8 0xffffffff81e453d7 in_ioctl+0x387 r9 0x7 r10 0x3 r11 0x295d56085be69e1f r12 0xffff80001d757960 r13 0 r14 0xffff80001d757960 r15 0 rip 0xffffffff81a094ff ifa_update_broadaddr+0x1f cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001d7577a0 ss 0x10 ifa_update_broadaddr+0x1f: movzbl 0(%r15),%r12d ddb> show proc PROC (syz-executor.0) pid=472205 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=76, nice=20 forw=0xffffffffffffffff, list=0xffff80001e7f73a0,0xffffffff827f1030 process=0xffff80001e810030 user=0xffff80001d752000, vmspace=0xfffffd806b42bef0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 47510 403424 93339 0 2 0 syz-executor.0 *47510 472205 93339 0 7 0x4000000 syz-executor.0 39995 491354 86593 0 2 0x2 syz-executor.1 59443 385116 0 0 3 0x14200 acct acct 25056 122818 0 0 3 0x14280 nfsidl nfsio 92892 223943 0 0 3 0x14280 nfsidl nfsio 82262 178670 0 0 3 0x14280 nfsidl nfsio 74212 522846 0 0 3 0x14280 nfsidl nfsio 72630 518205 0 0 3 0x14280 nfsidl nfsio 6339 172517 0 0 3 0x14280 nfsidl nfsio 81004 117135 0 0 3 0x14280 nfsidl nfsio 38108 95707 0 0 3 0x14280 nfsidl nfsio 97460 219961 0 0 3 0x14280 nfsidl nfsio 13398 320201 0 0 3 0x14280 nfsidl nfsio 42999 433563 0 0 3 0x14280 nfsidl nfsio 9832 241429 0 0 3 0x14280 nfsidl nfsio 19731 311350 0 0 3 0x14280 nfsidl nfsio 27323 105094 0 0 3 0x14280 nfsidl nfsio 52781 3518 0 0 3 0x14280 nfsidl nfsio 42159 187638 0 0 3 0x14280 nfsidl nfsio 61354 400157 0 0 3 0x14280 nfsidl nfsio 56438 447068 0 0 3 0x14280 nfsidl nfsio 14669 353505 0 0 3 0x14280 nfsidl nfsio 88272 199254 0 0 3 0x14280 nfsidl nfsio 67605 164610 0 0 3 0x14200 bored sosplice 93339 399856 86593 0 3 0x82 nanosleep syz-executor.0 86593 197977 23949 0 3 0x82 thrsleep syz-fuzzer 86593 180771 23949 0 3 0x4000082 nanosleep syz-fuzzer 86593 377585 23949 0 3 0x4000082 thrsleep syz-fuzzer 86593 474734 23949 0 3 0x4000082 thrsleep syz-fuzzer 86593 105308 23949 0 3 0x4000082 thrsleep syz-fuzzer 86593 102120 23949 0 3 0x4000082 kqread syz-fuzzer 86593 480009 23949 0 3 0x4000082 thrsleep syz-fuzzer 86593 7685 23949 0 3 0x4000082 thrsleep syz-fuzzer 23949 148302 14007 0 3 0x10008a pause ksh 14007 406949 50651 0 3 0x92 select sshd 52691 5044 1 0 3 0x100083 ttyin getty 50651 53936 1 0 3 0x80 select sshd 33491 331644 20242 73 2 0x100090 syslogd 20242 275224 1 0 3 0x100082 netio syslogd 98559 368783 1 77 3 0x100090 poll dhclient 76055 90068 1 0 3 0x80 poll dhclient 84867 328424 0 0 3 0x14200 bored smr 88928 67356 0 0 2 0x14200 zerothread 77717 324787 0 0 3 0x14200 aiodoned aiodoned 20020 314652 0 0 3 0x14200 syncer update 39509 56042 0 0 3 0x14200 cleaner cleaner 38562 114616 0 0 3 0x14200 reaper reaper 16354 195200 0 0 3 0x14200 pgdaemon pagedaemon 67317 470951 0 0 3 0x14200 bored crynlk 10242 250662 0 0 3 0x14200 bored crypto 97418 499491 0 0 3 0x40014200 acpi0 acpi0 2369 72539 0 0 3 0x14200 bored softnet 91223 514433 0 0 3 0x14200 bored systqmp 39452 439397 0 0 3 0x14200 bored systq 20584 480144 0 0 3 0x40014200 bored softclock 53050 246454 0 0 3 0x40014200 idle0 1 360676 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 9522 6508K 6864K 78643K 11638 0 pcb 13 8K 8K 78643K 679 0 rtable 115 9K 11K 78643K 2433 0 ifaddr 97 20K 20K 78643K 565 0 sysctl 2 0K 0K 78643K 2 0 counters 21 16K 17K 78643K 40 0 ioctlops 0 0K 4K 78643K 911 0 iov 0 0K 28K 78643K 111 0 mount 1 1K 1K 78643K 1 0 vnodes 1220 77K 77K 78643K 1563 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 12 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 146 0 dirhash 9 1K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 5 13K 25K 78643K 1313 0 sigio 0 0K 0K 78643K 26 0 proc 49 38K 63K 78643K 440 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 50 0 in_multi 76 3K 3K 78643K 199 0 ether_multi 1 0K 0K 78643K 16 0 mrt 0 0K 0K 78643K 6 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 256 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 138 56K 56K 78643K 3749 0 UVM aobj 37 2K 2K 78643K 41 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 1118 0 NDP 13 0K 0K 78643K 48 0 temp 132 3875K 3939K 78643K 20112 0 kqueue 3 4K 10K 78643K 29 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 10 0 4 1 0 1 1 0 8 0 rtpcb 80 45 0 43 1 0 1 1 0 8 0 rtentry 112 93 0 59 2 0 2 2 0 8 0 unpcb 120 869 0 860 1 0 1 1 0 8 0 syncache 264 9 0 9 4 4 0 1 0 8 0 tcpqe 32 344 0 344 2 2 0 1 0 8 0 tcpcb 544 243 0 238 4 3 1 2 0 8 0 ipq 40 2 0 2 1 1 0 1 0 8 0 ipqe 40 90 0 90 1 1 0 1 0 8 0 inpcb 296 2844 0 2836 3 1 2 2 0 8 1 rttmr 72 4 0 4 3 3 0 1 0 8 0 nd6 48 28 0 24 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1136 9 0 9 3 3 0 1 0 8 0 pfstscr 40 4 0 2 1 0 1 1 0 8 0 pfrktable 1344 987 0 975 3 1 2 2 0 8 1 pftag 88 43 0 40 2 1 1 1 0 8 0 pfstitem 24 5 0 1 1 0 1 1 0 8 0 pfstkey 112 8 0 4 1 0 1 1 0 8 0 pfstate 328 4 0 2 1 0 1 1 0 8 0 pfrule 1360 305 0 288 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 417 0 268 20 7 13 15 0 8 0 art_table 32 419 0 268 2 0 2 2 0 8 0 art_node 16 92 0 63 1 0 1 1 0 8 0 sysvmsgpl 40 32 0 24 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 144 0 134 1 0 1 1 0 8 0 shmpl 112 38 0 4 1 0 1 1 0 8 0 dirhash 1024 17 0 10 3 1 2 3 0 8 0 dino2pl 256 2920 0 1525 88 0 88 88 0 8 0 ffsino 240 2920 0 1525 83 0 83 83 0 8 0 nchpl 144 4772 0 3183 60 0 60 60 0 8 0 uvmvnodes 72 3213 0 0 59 0 59 59 0 8 0 vnodes 208 3213 0 0 170 0 170 170 0 8 0 namei 1024 13681 0 13680 3 2 1 1 0 8 0 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 528 4 0 2 3 2 1 1 0 8 0 pfiaddrpl 120 814 0 796 1 0 1 1 0 8 0 scxspl 192 13969 0 13969 1 0 1 1 0 8 1 plimitpl 152 53 0 46 1 0 1 1 0 8 0 sigapl 424 1518 0 1468 6 0 6 6 0 8 0 futexpl 56 29897 0 29897 2 1 1 1 0 8 1 knotepl 112 104 0 85 1 0 1 1 0 8 0 kqueuepl 144 108 0 105 1 0 1 1 0 8 0 pipepl 272 207 0 197 2 1 1 2 0 8 0 fdescpl 432 1482 0 1468 2 0 2 2 0 8 0 filepl 120 9656 0 9560 4 0 4 4 0 8 1 lockfpl 104 131 0 130 1 0 1 1 0 8 0 lockfspl 48 52 0 51 1 0 1 1 0 8 0 sessionpl 112 18 0 8 1 0 1 1 0 8 0 pgrppl 48 26 0 16 1 0 1 1 0 8 0 ucredpl 96 511 0 504 1 0 1 1 0 8 0 zombiepl 144 1468 0 1468 2 1 1 1 0 8 1 processpl 928 1518 0 1468 7 0 7 7 0 8 0 procpl 624 2963 0 2905 6 1 5 6 0 8 0 sosppl 128 3 0 3 1 1 0 1 0 8 0 sockpl 400 3768 0 3749 6 3 3 4 0 8 0 mcl64k 65536 52 0 52 2 2 0 1 0 8 0 mcl16k 16384 6 0 6 4 4 0 1 0 8 0 mcl12k 12288 30 0 30 5 4 1 1 0 8 1 mcl9k 9216 14 0 14 4 3 1 1 0 8 1 mcl8k 8192 264 0 264 4 3 1 1 0 8 1 mcl4k 4096 205 0 205 3 2 1 1 0 8 1 mcl2k2 2112 16 0 16 4 4 0 1 0 8 0 mcl2k 2048 94819 0 94735 44 32 12 34 0 8 0 mtagpl 96 74 0 19 3 1 2 2 0 8 0 mbufpl 256 160677 0 160297 44 19 25 25 0 8 0 bufpl 280 5218 0 125 364 0 364 364 0 8 0 anonpl 16 146439 0 129607 105 36 69 83 0 107 0 amapchunkpl 152 7198 0 7062 34 28 6 19 0 158 0 amappl16 192 6773 0 5842 79 32 47 59 0 8 0 amappl15 184 3 0 1 1 0 1 1 0 8 0 amappl14 176 32 0 27 1 0 1 1 0 8 0 amappl13 168 415 0 411 1 0 1 1 0 8 0 amappl12 160 403 0 399 1 0 1 1 0 8 0 amappl11 152 669 0 658 1 0 1 1 0 8 0 amappl10 144 17 0 8 1 0 1 1 0 8 0 amappl9 136 626 0 625 1 0 1 1 0 8 0 amappl8 128 634 0 588 2 0 2 2 0 8 0 amappl7 120 112 0 100 1 0 1 1 0 8 0 amappl6 112 640 0 634 1 0 1 1 0 8 0 amappl5 104 1061 0 1049 1 0 1 1 0 8 0 amappl4 96 828 0 802 1 0 1 1 0 8 0 amappl3 88 528 0 521 1 0 1 1 0 8 0 amappl2 80 11228 0 11159 2 0 2 2 0 8 0 amappl1 72 40921 0 40503 24 15 9 17 0 8 0 amappl 80 3201 0 3157 2 1 1 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 40 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1486 0 1470 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1486 0 1470 1 0 1 1 0 8 0 vmmpekpl 168 11751 0 11713 2 0 2 2 0 8 0 vmmpepl 168 183895 0 181852 164 55 109 130 0 357 17 vmsppl 272 1485 0 1470 3 1 2 2 0 8 0 pdppl 4096 2978 0 2942 6 1 5 6 0 8 0 pvpl 32 399776 0 379839 224 52 172 195 0 265 9 pmappl 200 1485 0 1470 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 331 0 84 8 0 8 8 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ifa_update_broadaddr(ffff800000ac6800,ffff800000ae5100,ffff80001d757960) at ifa_update_broadaddr+0x1f sys/net/if.c:2969 in_ioctl(80206913,ffff80001d757950,ffff800000ac6800,1) at in_ioctl+0x5eb sys/netinet/in.c:320 ifioctl(fffffd8053a66b08,80206913,ffff80001d757950,ffff80001e7f6500) at ifioctl+0xe60 sys/net/if.c:2181 sys_ioctl(ffff80001e7f6500,ffff80001d757a68,ffff80001d757ab0) at sys_ioctl+0x4a1 syscall(ffff80001d757b30) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf1cb421bcb0, count: -6 ddb> machine ddbcpu 1 No such command ddb> trace ifa_update_broadaddr(ffff800000ac6800,ffff800000ae5100,ffff80001d757960) at ifa_update_broadaddr+0x1f sys/net/if.c:2969 in_ioctl(80206913,ffff80001d757950,ffff800000ac6800,1) at in_ioctl+0x5eb sys/netinet/in.c:320 ifioctl(fffffd8053a66b08,80206913,ffff80001d757950,ffff80001e7f6500) at ifioctl+0xe60 sys/net/if.c:2181 sys_ioctl(ffff80001e7f6500,ffff80001d757a68,ffff80001d757ab0) at sys_ioctl+0x4a1 syscall(ffff80001d757b30) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf1cb421bcb0, count: -6