panic: kernel diagnostic assertion "ifa == rt->rt_ifa" failed: file "/syzkaller/managers/multicopraen/ick:er nkeelrn/esyl s/dinaetgnionsetti6c/n da6s.secr"t,i onl i"n!e _k9e4r7n e lStopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 241203 19635 0 0 0x4000000 1 syz-executor.1 *147353 32104 0 0 0x4000000 0 syz-executor.0 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(ffffffff82206f14,ffffffff821fe563,3b3,ffffffff821c09cc) at __assert+0x2b sys/kern/subr_prf.c:154 nd6_rtrequest(ffff800000aa0800,1,fffffd80629104d8) at nd6_rtrequest+0xbb4 sys/netinet6/nd6.c:947 rtrequest(1,ffff800022f6efa8,1,ffff800022f6f078,0) at rtrequest+0x9bf sys/net/route.c:973 rt_ifa_add(ffff800000adc100,240404,ffff800000adc158,0) at rt_ifa_add+0x290 sys/net/route.c:1133 rt_ifa_addlocal(ffff800000adc100) at rt_ifa_addlocal+0x16d sys/net/route.c:1242 in_ifinit(ffff800000aa0800,ffff800000adc100,ffff800022f6f3a0,0) at in_ifinit+0x1cf sys/netinet/in.c:614 in_ioctl_sifaddr(8020690c,ffff800022f6f390,ffff800000aa0800,1) at in_ioctl_sifaddr+0x208 sys/netinet/in.c:360 in_ioctl(8020690c,ffff800022f6f390,ffff800000aa0800,1) at in_ioctl+0x1e7 sys/netinet/in.c:231 ifioctl(fffffd80615af628,8020690c,ffff800022f6f390,ffff800020a5f8b8) at ifioctl+0xb64 sys/net/if.c:2202 sys_ioctl(ffff800020a5f8b8,ffff800022f6f4a8,ffff800022f6f4f0) at sys_ioctl+0x5b9 syscall(ffff800022f6f570) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800022f6f570) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,ffffffffffffff36,0,3,683a7772010) at Xsyscall+0x128 end of kernel end trace frame: 0x685dc9b3890, 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(ffffffff82206f14,ffffffff821fe563,3b3,ffffffff821c09cc) at __assert+0x2b sys/kern/subr_prf.c:154 nd6_rtrequest(ffff800000aa0800,1,fffffd80629104d8) at nd6_rtrequest+0xbb4 sys/netinet6/nd6.c:947 rtrequest(1,ffff800022f6efa8,1,ffff800022f6f078,0) at rtrequest+0x9bf sys/net/route.c:973 rt_ifa_add(ffff800000adc100,240404,ffff800000adc158,0) at rt_ifa_add+0x290 sys/net/route.c:1133 rt_ifa_addlocal(ffff800000adc100) at rt_ifa_addlocal+0x16d sys/net/route.c:1242 in_ifinit(ffff800000aa0800,ffff800000adc100,ffff800022f6f3a0,0) at in_ifinit+0x1cf sys/netinet/in.c:614 in_ioctl_sifaddr(8020690c,ffff800022f6f390,ffff800000aa0800,1) at in_ioctl_sifaddr+0x208 sys/netinet/in.c:360 in_ioctl(8020690c,ffff800022f6f390,ffff800000aa0800,1) at in_ioctl+0x1e7 sys/netinet/in.c:231 ifioctl(fffffd80615af628,8020690c,ffff800022f6f390,ffff800020a5f8b8) at ifioctl+0xb64 sys/net/if.c:2202 sys_ioctl(ffff800020a5f8b8,ffff800022f6f4a8,ffff800022f6f4f0) at sys_ioctl+0x5b9 syscall(ffff800022f6f570) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800022f6f570) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,ffffffffffffff36,0,3,683a7772010) at Xsyscall+0x128 end of kernel end trace frame: 0x685dc9b3890, count: -14 ddb{0}> show registers rdi 0xffffffff81807637 db_enter+0x17 rsi 0x4d04 __ALIGN_SIZE+0x3d04 rbp 0xffff800022f6ece0 rbx 0xffff800022f6ed90 rdx 0x4d05 __ALIGN_SIZE+0x3d05 rcx 0xffff800021952000 rax 0xffff800021952000 r8 0xffffffff8142986f kprintf+0x16f r9 0x1 r10 0x25 r11 0x3809e5acb2c4ffb3 r12 0x3000000008 r13 0xffff800022f6ecf0 r14 0x100 r15 0x1 rip 0xffffffff81807638 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800022f6ecd0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=147353 stat=onproc flags process=0 proc=4000000 pri=80, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff800020a5e008,0xffff800020abe790 process=0xffff800020adc700 user=0xffff800022f6a000, vmspace=0xfffffd807f00b8a0 estcpu=30, cpticks=0, pctcpu=0.1 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 19635 326200 44330 0 2 0 syz-executor.1 19635 241203 44330 0 7 0x4000000 syz-executor.1 32104 218642 22321 0 2 0 syz-executor.0 *32104 147353 22321 0 7 0x4000000 syz-executor.0 22321 312348 10259 0 3 0x82 nanosleep syz-executor.0 44330 180576 10259 0 2 0x482 syz-executor.1 97777 18750 0 0 3 0x14200 bored sosplice 10259 270741 45905 0 3 0x82 thrsleep syz-fuzzer 10259 141449 45905 0 3 0x4000082 nanosleep syz-fuzzer 10259 758 45905 0 3 0x4000082 thrsleep syz-fuzzer 10259 475595 45905 0 3 0x4000082 thrsleep syz-fuzzer 10259 170362 45905 0 3 0x4000082 kqread syz-fuzzer 10259 31282 45905 0 3 0x4000082 thrsleep syz-fuzzer 10259 74308 45905 0 3 0x4000082 thrsleep syz-fuzzer 10259 418730 45905 0 3 0x4000082 thrsleep syz-fuzzer 10259 361706 45905 0 3 0x4000082 thrsleep syz-fuzzer 10259 262778 45905 0 3 0x4000082 thrsleep syz-fuzzer 45905 192805 53319 0 3 0x10008a pause ksh 53319 310225 67468 0 3 0x92 select sshd 12003 489883 1 0 3 0x100083 ttyin getty 67468 421277 1 0 3 0x80 select sshd 14332 394035 22228 74 2 0x100492 pflogd 22228 157765 1 0 3 0x80 netio pflogd 55614 178725 77187 73 3 0x100090 kqread syslogd 77187 164516 1 0 3 0x100082 netio syslogd 51846 341075 1 77 3 0x100090 poll dhclient 98638 62759 1 0 3 0x80 poll dhclient 31064 13117 0 0 2 0x14200 zerothread 34269 80243 0 0 3 0x14200 aiodoned aiodoned 87112 444192 0 0 2 0x14200 update 15611 477207 0 0 3 0x14200 cleaner cleaner 81764 134599 0 0 3 0x14200 reaper reaper 61882 33966 0 0 3 0x14200 pgdaemon pagedaemon 92659 348244 0 0 3 0x14200 bored crynlk 54951 374683 0 0 3 0x14200 bored crypto 46785 145409 0 0 3 0x40014200 acpi0 acpi0 93399 440685 0 0 3 0x40014200 idle1 45032 258869 0 0 2 0x14200 softnet 64097 483281 0 0 2 0x14200 systqmp 9907 279143 0 0 3 0x14200 bored systq 60298 496967 0 0 2 0x40014200 softclock 78981 314649 0 0 3 0x40014200 idle0 9732 489459 0 0 3 0x14200 bored smr 1 354088 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 32104 (syz-executor.0) thread 0xffff800020a5f8b8 (147353) exclusive rwlock netlock r = 0 (0xffffffff824b42d8) #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 (0xffffffff826329b0) #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 9582 6452K 7521K 78643K 14334 0 0 pcb 13 8K 8K 78643K 393 0 0 rtable 101 13K 13K 78643K 1273 0 0 ifaddr 83 17K 18K 78643K 411 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1597 0 0 iov 0 0K 32K 78643K 321 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1218 77K 77K 78643K 2558 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 21 0 0 VM map 15 7K 8K 78643K 32 0 0 sem 12 0K 0K 78643K 363 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 6 17K 25K 78643K 1654 0 0 sigio 0 0K 0K 78643K 34 0 0 proc 61 63K 83K 78643K 838 0 0 subproc 32 2K 2K 78643K 136 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 100 0 0 in_multi 20 1K 2K 78643K 254 0 0 ether_multi 1 0K 0K 78643K 19 0 0 mrt 0 0K 0K 78643K 6 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 54 238K 238K 78643K 54 0 0 exec 0 0K 1K 78643K 453 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 140 161K 161K 78643K 6764 0 0 UVM aobj 130 4K 4K 78643K 133 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 339 0 0 NDP 20 0K 0K 78643K 125 0 0 temp 229 3561K 3641K 78643K 38683 0 0 kqueue 0 0K 0K 78643K 20 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 39 0 36 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 150 0 148 1 0 1 1 0 8 0 rtentry 112 222 0 186 2 0 2 2 0 8 0 unpcb 120 886 0 874 3 2 1 2 0 8 0 syncache 264 5 0 5 2 2 0 1 0 8 0 tcpqe 32 57 0 57 3 3 0 1 0 8 0 tcpcb 544 555 0 551 1 0 1 1 0 8 0 inpcb 280 4582 0 4573 6 3 3 3 0 8 2 rttmr 72 3 0 2 1 0 1 1 0 8 0 nd6 48 30 0 27 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 2 0 1 0 8 0 ppxss 1128 58 0 58 4 3 1 1 0 8 1 pffrag 232 47 0 47 3 2 1 1 0 482 1 pffrnode 88 47 0 47 3 2 1 1 0 8 1 pffrent 40 960 0 960 3 2 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 24 152 0 82 1 0 1 1 0 8 0 pfstkey 112 152 0 82 3 0 3 3 0 8 0 pfstate 328 152 0 82 7 0 7 7 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 1 2 1 1 2 0 8 0 art_heap4 256 1006 0 799 22 8 14 16 0 8 0 art_table 32 1008 0 800 4 2 2 3 0 8 0 art_node 16 221 0 187 1 0 1 1 0 8 0 sysvmsgpl 40 37 0 20 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 359 0 349 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 3923 0 2516 46 0 46 46 0 8 0 ffsino 272 3923 0 2516 95 0 95 95 0 8 0 nchpl 144 6487 0 6027 61 41 20 61 0 8 0 uvmvnodes 72 4908 0 0 90 0 90 90 0 8 0 vnodes 208 4908 0 0 259 0 259 259 0 8 0 namei 1024 20053 0 20053 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 13 0 0 2 0 2 2 0 8 0 vmpool 552 30 0 17 2 0 2 2 0 8 1 scsiplug 64 3 0 3 2 2 0 1 0 8 0 scxspl 192 21826 0 21826 18 17 1 7 0 8 1 plimitpl 152 164 0 156 1 0 1 1 0 8 0 sigapl 432 1836 0 1820 3 1 2 3 0 8 0 futexpl 56 37791 0 37791 1 0 1 1 0 8 1 knotepl 112 1121 0 1102 3 2 1 3 0 8 0 kqueuepl 104 1761 0 1759 1 0 1 1 0 8 0 pipepl 112 960 0 941 1 0 1 1 0 8 0 fdescpl 488 1837 0 1820 3 0 3 3 0 8 0 filepl 152 16244 0 16142 13 7 6 7 0 8 2 lockfpl 104 537 0 536 1 0 1 1 0 8 0 lockfspl 48 190 0 189 1 0 1 1 0 8 0 sessionpl 112 24 0 13 1 0 1 1 0 8 0 pgrppl 48 34 0 23 1 0 1 1 0 8 0 ucredpl 96 1483 0 1473 1 0 1 1 0 8 0 zombiepl 144 1820 0 1820 1 0 1 1 0 8 1 processpl 896 1853 0 1820 4 0 4 4 0 8 0 procpl 632 5642 0 5598 6 1 5 5 0 8 1 srpgc 64 2 0 2 1 1 0 1 0 8 0 sosppl 128 766 0 766 1 0 1 1 0 8 1 sockpl 384 5639 0 5616 12 7 5 7 0 8 1 mcl64k 65536 259 0 0 33 0 33 33 0 8 0 mcl16k 16384 9 0 0 2 0 2 2 0 8 0 mcl12k 12288 21 0 0 2 0 2 2 0 8 0 mcl9k 9216 11 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 14 0 0 2 0 2 2 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 146 0 0 17 0 17 17 0 8 0 mtagpl 80 62 0 0 1 0 1 1 0 8 0 mbufpl 256 723 0 0 44 0 44 44 0 8 0 bufpl 256 12951 0 5903 441 0 441 441 0 8 0 anonpl 16 227481 0 207508 134 37 97 97 0 124 15 amapchunkpl 152 12582 0 12446 24 17 7 12 0 158 1 amappl16 192 10837 0 9715 118 49 69 69 0 8 12 amappl15 184 86 0 86 2 2 0 1 0 8 0 amappl14 176 570 0 566 1 0 1 1 0 8 0 amappl13 168 2 0 2 2 2 0 1 0 8 0 amappl12 160 27 0 24 1 0 1 1 0 8 0 amappl11 152 514 0 496 1 0 1 1 0 8 0 amappl10 144 542 0 536 1 0 1 1 0 8 0 amappl9 136 694 0 688 1 0 1 1 0 8 0 amappl8 128 272 0 239 3 1 2 2 0 8 0 amappl7 120 597 0 592 1 0 1 1 0 8 0 amappl6 112 491 0 480 1 0 1 1 0 8 0 amappl5 104 189 0 175 1 0 1 1 0 8 0 amappl4 96 1716 0 1685 1 0 1 1 0 8 0 amappl3 88 1088 0 1078 1 0 1 1 0 8 0 amappl2 80 13487 0 13406 3 0 3 3 0 8 0 amappl1 72 50074 0 49616 25 15 10 20 0 8 0 amappl 80 6015 0 5965 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 64 132 0 3 3 0 3 3 0 8 0 uaddrrnd 24 1867 0 1820 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1867 0 1820 1 0 1 1 0 8 0 vmmpekpl 168 17979 0 17943 2 0 2 2 0 8 0 vmmpepl 168 239201 0 236803 196 61 135 142 0 357 29 vmsppl 368 1836 0 1820 2 0 2 2 0 8 0 pdppl 4096 3741 0 3687 8 0 8 8 0 8 1 pvpl 32 621727 0 599733 267 52 215 219 0 265 30 pmappl 232 1866 0 1837 2 0 2 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 680 0 12 20 0 20 20 0 8 0