login: panic: kernel diagnostic assertion "ifa == rt->rt_ifa" failed: file "/syzkaller/managers/multicore/kernel/sys/netinet6/nd6.c", line 947 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *113492 93505 0 0 0x4000000 0K syz-executor.0 521372 86612 0 0x14000 0x200 1 systqmp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff82205e21,ffffffff821fcb2f,3b3,ffffffff821bd569) at __assert+0x2b sys/kern/subr_prf.c:154 nd6_rtrequest(ffff800000af5000,1,fffffd80627dce78) at nd6_rtrequest+0xbb4 sys/netinet6/nd6.c:947 rtrequest(1,ffff800021f9a9f8,1,ffff800021f9aac8,0) at rtrequest+0x9bf sys/net/route.c:973 rt_ifa_add(ffff800000ab9700,240404,ffff800000ab9758,0) at rt_ifa_add+0x290 sys/net/route.c:1133 rt_ifa_addlocal(ffff800000ab9700) at rt_ifa_addlocal+0x16d sys/net/route.c:1242 in_ifinit(ffff800000af5000,ffff800000ab9700,ffff800021f9adf0,0) at in_ifinit+0x1cf sys/netinet/in.c:614 in_ioctl_sifaddr(8020690c,ffff800021f9ade0,ffff800000af5000,1) at in_ioctl_sifaddr+0x208 sys/netinet/in.c:360 in_ioctl(8020690c,ffff800021f9ade0,ffff800000af5000,1) at in_ioctl+0x1e7 sys/netinet/in.c:231 ifioctl(fffffd8062392918,8020690c,ffff800021f9ade0,ffff800020a5f8b8) at ifioctl+0xb64 sys/net/if.c:2202 sys_ioctl(ffff800020a5f8b8,ffff800021f9aef8,ffff800021f9af40) at sys_ioctl+0x5b9 syscall(ffff800021f9afc0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800021f9afc0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,ffffffffffffff36,0,3,d5d2bb121b0) at Xsyscall+0x128 end of kernel end trace frame: 0xd5f556b8150, count: 1 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic kernel diagnostic assertion "ifa == rt->rt_ifa" failed: file "/syzkaller/managers/multicore/kernel/sys/netinet6/nd6.c", line 947 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff82205e21,ffffffff821fcb2f,3b3,ffffffff821bd569) at __assert+0x2b sys/kern/subr_prf.c:154 nd6_rtrequest(ffff800000af5000,1,fffffd80627dce78) at nd6_rtrequest+0xbb4 sys/netinet6/nd6.c:947 rtrequest(1,ffff800021f9a9f8,1,ffff800021f9aac8,0) at rtrequest+0x9bf sys/net/route.c:973 rt_ifa_add(ffff800000ab9700,240404,ffff800000ab9758,0) at rt_ifa_add+0x290 sys/net/route.c:1133 rt_ifa_addlocal(ffff800000ab9700) at rt_ifa_addlocal+0x16d sys/net/route.c:1242 in_ifinit(ffff800000af5000,ffff800000ab9700,ffff800021f9adf0,0) at in_ifinit+0x1cf sys/netinet/in.c:614 in_ioctl_sifaddr(8020690c,ffff800021f9ade0,ffff800000af5000,1) at in_ioctl_sifaddr+0x208 sys/netinet/in.c:360 in_ioctl(8020690c,ffff800021f9ade0,ffff800000af5000,1) at in_ioctl+0x1e7 sys/netinet/in.c:231 ifioctl(fffffd8062392918,8020690c,ffff800021f9ade0,ffff800020a5f8b8) at ifioctl+0xb64 sys/net/if.c:2202 sys_ioctl(ffff800020a5f8b8,ffff800021f9aef8,ffff800021f9af40) at sys_ioctl+0x5b9 syscall(ffff800021f9afc0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800021f9afc0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,ffffffffffffff36,0,3,d5d2bb121b0) at Xsyscall+0x128 end of kernel end trace frame: 0xd5f556b8150, count: -14 ddb{0}> show registers rdi 0xffffffff81bab4d7 db_enter+0x17 rsi 0x4e96 __ALIGN_SIZE+0x3e96 rbp 0xffff800021f9a730 rbx 0xffff800021f9a7e0 rdx 0x4e97 __ALIGN_SIZE+0x3e97 rcx 0xffff800023da2000 rax 0xffff800023da2000 r8 0xffffffff8188b28f kprintf+0x16f r9 0x1 r10 0x25 r11 0x340787b93108e0f0 r12 0x3000000008 r13 0xffff800021f9a740 r14 0x100 r15 0x1 rip 0xffffffff81bab4d8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021f9a720 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=113492 stat=onproc flags process=0 proc=4000000 pri=79, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff800020ac09f0,0xffffffff8264c6f8 process=0xffff800020adca80 user=0xffff800021f96000, vmspace=0xfffffd807f00a8a0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 95923 107872 18100 0 2 0 syz-executor.1 95923 64376 18100 0 3 0x4000080 fsleep syz-executor.1 93505 62593 89564 0 2 0 syz-executor.0 93505 133209 89564 0 3 0x4000080 fsleep syz-executor.0 93505 171865 89564 0 3 0x4000080 fsleep syz-executor.0 *93505 113492 89564 0 7 0x4000000 syz-executor.0 18100 110822 79883 0 2 0x482 syz-executor.1 49043 380808 1 0 3 0x100083 ttyin getty 89564 176411 79883 0 3 0x82 nanosleep syz-executor.0 52875 373590 0 0 3 0x14200 acct acct 36516 472761 0 0 3 0x14200 bored sosplice 79883 353687 45115 0 3 0x82 kqread syz-fuzzer 79883 231764 45115 0 2 0x4000482 syz-fuzzer 79883 146818 45115 0 3 0x4000082 thrsleep syz-fuzzer 79883 341235 45115 0 3 0x4000082 thrsleep syz-fuzzer 79883 192236 45115 0 3 0x4000082 thrsleep syz-fuzzer 79883 276071 45115 0 3 0x4000082 thrsleep syz-fuzzer 79883 373410 45115 0 3 0x4000082 thrsleep syz-fuzzer 79883 487521 45115 0 3 0x4000082 thrsleep syz-fuzzer 79883 354898 45115 0 3 0x4000082 thrsleep syz-fuzzer 79883 359587 45115 0 3 0x4000082 thrsleep syz-fuzzer 45115 447677 27975 0 3 0x10008a pause ksh 27975 221969 99968 0 3 0x92 select sshd 99968 399365 1 0 3 0x80 select sshd 16300 420559 15427 74 3 0x100092 bpf pflogd 15427 524084 1 0 3 0x80 netio pflogd 31173 106464 13837 73 3 0x100090 kqread syslogd 13837 440348 1 0 3 0x100082 netio syslogd 39120 477109 1 77 3 0x100090 poll dhclient 50653 182013 1 0 3 0x80 poll dhclient 90829 283075 0 0 2 0x14200 zerothread 2134 366815 0 0 3 0x14200 aiodoned aiodoned 67052 310838 0 0 3 0x14200 syncer update 18092 434085 0 0 3 0x14200 cleaner cleaner 3993 437285 0 0 3 0x14200 reaper reaper 38313 34932 0 0 3 0x14200 pgdaemon pagedaemon 76170 159971 0 0 3 0x14200 bored crynlk 25569 482808 0 0 3 0x14200 bored crypto 71912 126678 0 0 3 0x40014200 acpi0 acpi0 71565 301588 0 0 3 0x40014200 idle1 68771 197669 0 0 3 0x14200 bored softnet 86612 521372 0 0 7 0x14200 systqmp 15486 51140 0 0 3 0x14200 bored systq 47181 238644 0 0 3 0x40014200 bored softclock 81344 221516 0 0 3 0x40014200 idle0 84169 456846 0 0 3 0x14200 bored smr 1 499274 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 93505 (syz-executor.0) thread 0xffff800020a5f8b8 (113492) exclusive rwlock netlock r = 0 (0xffffffff824e8728) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 in_ioctl_sifaddr+0x69 #2 in_ioctl+0x1e7 sys/netinet/in.c:231 #3 ifioctl+0xb64 sys/net/if.c:2202 #4 sys_ioctl+0x5b9 #5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8266bc58) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:83 [inline] #1 syscall+0x400 sys/arch/amd64/amd64/trap.c:555 #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9563 6480K 7304K 78643K 14743 0 0 pcb 13 8K 8K 78643K 339 0 0 rtable 104 4K 4K 78643K 896 0 0 ifaddr 68 14K 15K 78643K 234 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1532 0 0 iov 0 0K 16K 78643K 225 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1233 77K 78K 78643K 2752 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 17 0 0 VM map 6 3K 3K 78643K 8 0 0 sem 12 0K 0K 78643K 220 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 6 17K 25K 78643K 958 0 0 sigio 0 0K 0K 78643K 7 0 0 proc 60 63K 95K 78643K 852 0 0 subproc 32 2K 2K 78643K 170 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 55 0 0 in_multi 29 1K 2K 78643K 168 0 0 ether_multi 1 0K 0K 78643K 13 0 0 mrt 0 0K 0K 78643K 7 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 78 344K 344K 78643K 78 0 0 exec 0 0K 1K 78643K 382 0 0 pfkey data 0 0K 0K 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 129 55K 56K 78643K 4394 0 0 UVM aobj 57 2K 2K 78643K 57 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 172 0 0 NDP 15 0K 0K 78643K 74 0 0 temp 193 3560K 3629K 78643K 24971 0 0 kqueue 0 0K 0K 78643K 13 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 35 0 30 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 115 0 113 1 0 1 1 0 8 0 rtentry 112 170 0 128 2 0 2 2 0 8 0 unpcb 120 795 0 783 1 0 1 1 0 8 0 syncache 264 13 0 13 5 5 0 1 0 8 0 tcpqe 32 20 0 20 2 2 0 1 0 8 0 tcpcb 544 401 0 397 1 0 1 1 0 8 0 inpcb 280 1660 0 1651 5 2 3 3 0 8 2 rttmr 72 4 0 3 1 0 1 1 0 8 0 nd6 48 23 0 18 4 3 1 1 0 8 0 pkpcb 40 6 0 6 3 2 1 1 0 8 1 ppxss 1128 18 0 18 7 6 1 1 0 8 1 pffrag 232 26 0 26 7 6 1 1 0 482 1 pffrnode 88 26 0 26 7 6 1 1 0 8 1 pffrent 40 910 0 910 7 6 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 77 0 38 1 0 1 1 0 8 0 pfstkey 112 77 0 38 2 0 2 2 0 8 0 pfstate 328 77 0 38 4 0 4 4 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 256 721 0 471 27 10 17 17 0 8 0 art_table 32 722 0 471 3 0 3 3 0 8 0 art_node 16 169 0 129 1 0 1 1 0 8 0 sysvmsgpl 40 34 0 22 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 218 0 208 1 0 1 1 0 8 0 shmpl 112 55 0 0 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2870 0 1456 46 0 46 46 0 8 0 ffsino 272 2870 0 1456 95 0 95 95 0 8 0 nchpl 144 4473 0 2859 61 0 61 61 0 8 0 uvmvnodes 72 4185 0 0 77 0 77 77 0 8 0 vnodes 208 4185 0 0 221 0 221 221 0 8 0 namei 1024 15707 0 15707 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 552 6 0 2 2 1 1 1 0 8 0 scsiplug 64 5 0 5 3 2 1 1 0 8 1 scxspl 192 14038 0 14038 18 17 1 7 0 8 1 plimitpl 152 86 0 78 1 0 1 1 0 8 0 sigapl 432 1135 0 1119 3 1 2 3 0 8 0 futexpl 56 21933 0 21930 1 0 1 1 0 8 0 knotepl 112 337 0 318 1 0 1 1 0 8 0 kqueuepl 104 272 0 270 1 0 1 1 0 8 0 pipepl 112 946 0 927 1 0 1 1 0 8 0 fdescpl 488 1136 0 1119 3 0 3 3 0 8 0 filepl 152 10586 0 10484 11 5 6 7 0 8 1 lockfpl 104 613 0 612 1 0 1 1 0 8 0 lockfspl 48 219 0 218 1 0 1 1 0 8 0 sessionpl 112 27 0 16 1 0 1 1 0 8 0 pgrppl 48 43 0 32 1 0 1 1 0 8 0 ucredpl 96 1372 0 1363 1 0 1 1 0 8 0 zombiepl 144 1119 0 1119 1 0 1 1 0 8 1 processpl 896 1153 0 1119 4 0 4 4 0 8 0 procpl 632 3230 0 3183 5 0 5 5 0 8 1 srpgc 64 15 0 15 6 6 0 1 0 8 0 sosppl 128 203 0 203 1 0 1 1 0 8 1 sockpl 384 2604 0 2581 9 4 5 5 0 8 2 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 7 0 0 1 0 1 1 0 8 0 mcl8k 8192 14 0 0 2 0 2 2 0 8 0 mcl4k 4096 13 0 0 2 0 2 2 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 169 0 0 20 1 19 20 0 8 0 mtagpl 80 14 0 0 1 0 1 1 0 8 0 mbufpl 256 533 0 0 28 0 28 28 0 8 0 bufpl 256 9004 0 1956 441 0 441 441 0 8 0 anonpl 16 142835 0 123656 106 27 79 87 0 124 1 amapchunkpl 152 7872 0 7700 12 1 11 11 0 158 2 amappl16 192 5526 0 4491 82 29 53 64 0 8 0 amappl15 184 315 0 313 1 0 1 1 0 8 0 amappl14 176 249 0 243 1 0 1 1 0 8 0 amappl13 168 58 0 57 1 0 1 1 0 8 0 amappl12 160 81 0 78 1 0 1 1 0 8 0 amappl11 152 358 0 342 1 0 1 1 0 8 0 amappl10 144 25 0 19 1 0 1 1 0 8 0 amappl9 136 778 0 772 1 0 1 1 0 8 0 amappl8 128 337 0 303 2 0 2 2 0 8 0 amappl7 120 88 0 80 1 0 1 1 0 8 0 amappl6 112 346 0 333 1 0 1 1 0 8 0 amappl5 104 246 0 231 1 0 1 1 0 8 0 amappl4 96 1285 0 1253 1 0 1 1 0 8 0 amappl3 88 443 0 436 1 0 1 1 0 8 0 amappl2 80 7930 0 7849 3 1 2 3 0 8 0 amappl1 72 35929 0 35469 25 15 10 20 0 8 0 amappl 80 3629 0 3572 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 17 0 17 1 1 0 1 0 8 0 aobjpl 64 56 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1142 0 1119 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1142 0 1119 1 0 1 1 0 8 0 vmmpekpl 168 14264 0 14230 2 0 2 2 0 8 0 vmmpepl 168 153643 0 151325 188 55 133 137 0 357 30 vmsppl 368 1135 0 1119 2 0 2 2 0 8 0 pdppl 4096 2291 0 2246 6 0 6 6 0 8 0 pvpl 32 425143 0 402637 231 37 194 204 0 265 11 pmappl 232 1141 0 1121 4 2 2 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 637 0 14 18 0 18 18 0 8 0