oLpanic: 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 85937 89597 0 0 0 0 syz-executor.1 *493670 89597 0 0 0x4000000 1K syz-executor.1 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(ffffffff822069c1,ffffffff82200c5d,3b3,ffffffff821c1ef2) at __assert+0x2b sys/kern/subr_prf.c:154 nd6_rtrequest(ffff800000af4000,1,fffffd8072cd41c8) at nd6_rtrequest+0xbb4 sys/netinet6/nd6.c:947 rtrequest(1,ffff80002359aac8,1,ffff80002359ab98,0) at rtrequest+0x9bf sys/net/route.c:973 rt_ifa_add(ffff800000acf700,240404,ffff800000acf758,0) at rt_ifa_add+0x290 sys/net/route.c:1133 rt_ifa_addlocal(ffff800000acf700) at rt_ifa_addlocal+0x16d sys/net/route.c:1242 in_ifinit(ffff800000af4000,ffff800000acf700,ffff80002359aec0,0) at in_ifinit+0x1cf sys/netinet/in.c:645 in_ioctl_sifaddr(8020690c,ffff80002359aeb0,ffff800000af4000,1) at in_ioctl_sifaddr+0x208 sys/netinet/in.c:372 in_ioctl(8020690c,ffff80002359aeb0,ffff800000af4000,1) at in_ioctl+0x1e7 sys/netinet/in.c:243 ifioctl(fffffd806f6cd480,8020690c,ffff80002359aeb0,ffff800020ab13d8) at ifioctl+0xb64 sys/net/if.c:2202 sys_ioctl(ffff800020ab13d8,ffff80002359afc8,ffff80002359b010) at sys_ioctl+0x5b9 syscall(ffff80002359b090) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff80002359b090) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,ffffffffffffff36,0,3,aebc71d3010) at Xsyscall+0x128 end of kernel end trace frame: 0xaee41ed9240, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic kernel diagnostic assertion "ifa == rt->rt_ifa" failed: file "/syzkaller/managers/multicore/kernel/sys/netinet6/nd6.c", line 947 ddb{1}> 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(ffffffff822069c1,ffffffff82200c5d,3b3,ffffffff821c1ef2) at __assert+0x2b sys/kern/subr_prf.c:154 nd6_rtrequest(ffff800000af4000,1,fffffd8072cd41c8) at nd6_rtrequest+0xbb4 sys/netinet6/nd6.c:947 rtrequest(1,ffff80002359aac8,1,ffff80002359ab98,0) at rtrequest+0x9bf sys/net/route.c:973 rt_ifa_add(ffff800000acf700,240404,ffff800000acf758,0) at rt_ifa_add+0x290 sys/net/route.c:1133 rt_ifa_addlocal(ffff800000acf700) at rt_ifa_addlocal+0x16d sys/net/route.c:1242 in_ifinit(ffff800000af4000,ffff800000acf700,ffff80002359aec0,0) at in_ifinit+0x1cf sys/netinet/in.c:645 in_ioctl_sifaddr(8020690c,ffff80002359aeb0,ffff800000af4000,1) at in_ioctl_sifaddr+0x208 sys/netinet/in.c:372 in_ioctl(8020690c,ffff80002359aeb0,ffff800000af4000,1) at in_ioctl+0x1e7 sys/netinet/in.c:243 ifioctl(fffffd806f6cd480,8020690c,ffff80002359aeb0,ffff800020ab13d8) at ifioctl+0xb64 sys/net/if.c:2202 sys_ioctl(ffff800020ab13d8,ffff80002359afc8,ffff80002359b010) at sys_ioctl+0x5b9 syscall(ffff80002359b090) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff80002359b090) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,ffffffffffffff36,0,3,aebc71d3010) at Xsyscall+0x128 end of kernel end trace frame: 0xaee41ed9240, count: -14 ddb{1}> show registers rdi 0xffffffff81194cb7 db_enter+0x17 rsi 0x85f5 __ALIGN_SIZE+0x75f5 rbp 0xffff80002359a800 rbx 0xffff80002359a8b0 rdx 0x85f6 __ALIGN_SIZE+0x75f6 rcx 0xffff800021550000 rax 0xffff800021550000 r8 0xffffffff81f734ef kprintf+0x16f r9 0x1 r10 0x25 r11 0xf130c79b886e44f2 r12 0x3000000008 r13 0xffff80002359a810 r14 0x100 r15 0x1 rip 0xffffffff81194cb8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002359a7f0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=493670 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab0290,0xffffffff82645b50 process=0xffff800020adc380 user=0xffff800023596000, vmspace=0xfffffd807f00aa10 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 89597 85937 42545 0 7 0 syz-executor.1 *89597 493670 42545 0 7 0x4000000 syz-executor.1 42545 322673 69366 0 3 0x82 nanosleep syz-executor.1 85072 376448 69366 0 3 0x2 biowait syz-executor.0 55202 377731 0 0 3 0x14200 bored sosplice 69366 187162 55595 0 3 0x82 thrsleep syz-fuzzer 69366 374257 55595 0 3 0x4000082 nanosleep syz-fuzzer 69366 315472 55595 0 3 0x4000082 thrsleep syz-fuzzer 69366 122562 55595 0 3 0x4000082 thrsleep syz-fuzzer 69366 136486 55595 0 3 0x4000082 kqread syz-fuzzer 69366 187883 55595 0 3 0x4000082 thrsleep syz-fuzzer 69366 181334 55595 0 3 0x4000082 thrsleep syz-fuzzer 69366 359187 55595 0 3 0x4000082 thrsleep syz-fuzzer 69366 209350 55595 0 3 0x4000082 nanosleep syz-fuzzer 69366 58287 55595 0 3 0x4000082 thrsleep syz-fuzzer 55595 436137 63661 0 3 0x10008a pause ksh 63661 108468 66255 0 3 0x92 select sshd 34912 129054 1 0 3 0x100083 ttyopn getty 66255 340108 1 0 3 0x80 select sshd 98121 295805 54971 74 3 0x100092 bpf pflogd 54971 507129 1 0 3 0x80 netio pflogd 89459 234400 49528 73 3 0x100090 kqread syslogd 49528 423369 1 0 3 0x100082 netio syslogd 18580 267354 1 77 3 0x100090 poll dhclient 67404 288154 1 0 3 0x80 poll dhclient 9217 58818 0 0 3 0x14200 pgzero zerothread 39148 504581 0 0 3 0x14200 aiodoned aiodoned 88033 243379 0 0 3 0x14200 syncer update 8197 89976 0 0 3 0x14200 cleaner cleaner 72549 496392 0 0 3 0x14200 reaper reaper 29390 347447 0 0 3 0x14200 pgdaemon pagedaemon 73052 270083 0 0 3 0x14200 bored crynlk 92622 6487 0 0 3 0x14200 bored crypto 97610 189325 0 0 3 0x40014200 acpi0 acpi0 10436 60760 0 0 3 0x40014200 idle1 30170 33273 0 0 3 0x14200 bored softnet 76183 347249 0 0 2 0x14200 systqmp 54331 429568 0 0 3 0x14200 bored systq 88059 357532 0 0 3 0x40014200 bored softclock 86412 41887 0 0 3 0x40014200 idle0 56929 137364 0 0 3 0x14200 bored smr 1 102556 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 89597 (syz-executor.1) thread 0xffff800020ab13d8 (493670) exclusive rwlock netlock r = 0 (0xffffffff824f3758) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 in_ioctl_sifaddr+0x69 #2 in_ioctl+0x1e7 sys/netinet/in.c:243 #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 (0xffffffff8262a6d0) #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 Process 85072 (syz-executor.0) thread 0xffff800020ab09f8 (376448) exclusive rrwlock inode r = 0 (0xfffffd806e4ab6f8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x447 sys/kern/kern_rwlock.c:306 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435 #3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1352 #5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392 #6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1164 #7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450 #8 domkdirat+0x121 sys/kern/vfs_syscalls.c:2983 #9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #10 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80627af920) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x447 sys/kern/kern_rwlock.c:306 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435 #3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:574 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:2968 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9577 6445K 7285K 78643K 25339 0 0 pcb 13 8K 9K 78643K 374 0 0 rtable 100 5K 5K 78643K 1179 0 0 ifaddr 79 17K 18K 78643K 303 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1556 0 0 iov 0 0K 16K 78643K 295 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1222 77K 77K 78643K 3750 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 22 0 0 VM map 12 6K 6K 78643K 18 0 0 sem 12 0K 0K 78643K 3173 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 5 13K 25K 78643K 2643 0 0 sigio 0 0K 0K 78643K 24 0 0 proc 61 63K 95K 78643K 1022 0 0 subproc 32 2K 2K 78643K 221 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 2817 0 0 in_multi 24 1K 2K 78643K 245 0 0 ether_multi 1 0K 0K 78643K 16 0 0 mrt 0 0K 0K 78643K 14 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 114 503K 503K 78643K 114 0 0 exec 0 0K 1K 78643K 511 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 140 104K 104K 78643K 8720 0 0 UVM aobj 130 5K 5K 78643K 136 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 315 0 0 NDP 18 0K 0K 78643K 96 0 0 temp 213 3560K 4200K 78643K 35194 0 0 kqueue 0 0K 0K 78643K 10 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 40 0 36 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 125 0 123 1 0 1 1 0 8 0 rtentry 112 243 0 206 2 0 2 2 0 8 0 unpcb 120 1209 0 1199 4 3 1 2 0 8 0 syncache 264 10 0 10 4 3 1 1 0 8 1 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 544 4740 0 4736 5 4 1 3 0 8 0 inpcb 280 6239 0 6231 8 6 2 5 0 8 1 rttmr 72 5 0 4 4 3 1 1 0 8 0 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 40 1 0 1 1 1 0 1 0 8 0 nd6 48 33 0 29 1 0 1 1 0 8 0 pkpcb 40 6 0 6 2 1 1 1 0 8 1 ppxss 1128 31 0 31 8 7 1 1 0 8 1 pffrag 232 27 0 27 5 4 1 1 0 482 1 pffrnode 88 27 0 27 5 4 1 1 0 8 1 pffrent 40 992 0 992 5 4 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 24 115 0 74 1 0 1 1 0 8 0 pfstkey 112 115 0 74 3 1 2 2 0 8 0 pfstate 328 115 0 74 5 0 5 5 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 9 0 7 4 2 2 3 0 8 0 art_heap4 256 1009 0 780 18 3 15 15 0 8 0 art_table 32 1018 0 787 2 0 2 2 0 8 0 art_node 16 242 0 206 1 0 1 1 0 8 0 sysvmsgpl 40 41 0 23 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 3171 0 3161 1 0 1 1 0 8 0 shmpl 112 134 0 6 5 1 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 4663 0 3248 46 0 46 46 0 8 0 ffsino 272 4663 0 3248 95 0 95 95 0 8 0 nchpl 144 12189 0 10583 61 1 60 61 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 208 5926 0 0 312 0 312 312 0 8 0 namei 1024 41179 0 41178 1 0 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 10 0 0 2 0 2 2 0 8 0 vmpool 552 16 0 6 1 0 1 1 0 8 0 scxspl 192 27927 0 27926 21 20 1 7 0 8 0 plimitpl 152 112 0 104 1 0 1 1 0 8 0 sigapl 432 2808 0 2793 3 1 2 3 0 8 0 futexpl 56 98489 0 98489 1 0 1 1 0 8 1 knotepl 112 1766 0 1747 4 3 1 2 0 8 0 kqueuepl 104 2554 0 2552 1 0 1 1 0 8 0 pipepl 112 9116 0 9097 3 2 1 2 0 8 0 fdescpl 488 2809 0 2793 3 0 3 3 0 8 0 filepl 152 45246 0 45143 13 7 6 8 0 8 2 lockfpl 104 467 0 466 1 0 1 1 0 8 0 lockfspl 48 160 0 159 1 0 1 1 0 8 0 sessionpl 112 29 0 18 1 0 1 1 0 8 0 pgrppl 48 42 0 31 1 0 1 1 0 8 0 ucredpl 96 1961 0 1950 1 0 1 1 0 8 0 zombiepl 144 2794 0 2794 1 0 1 1 0 8 1 processpl 896 2826 0 2794 4 0 4 4 0 8 0 procpl 632 7337 0 7295 9 4 5 5 0 8 1 srpgc 64 20 0 20 7 7 0 1 0 8 0 sosppl 128 57 0 57 7 6 1 1 0 8 1 sockpl 384 7617 0 7597 19 15 4 9 0 8 2 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 12 0 0 2 0 2 2 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 32 0 0 3 0 3 3 0 8 0 mcl4k 4096 10 0 0 2 0 2 2 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 158 0 0 19 1 18 19 0 8 0 mtagpl 80 56 0 0 1 0 1 1 0 8 0 mbufpl 256 442 0 0 25 0 25 25 0 8 0 bufpl 256 12071 0 5013 442 0 442 442 0 8 0 anonpl 16 302980 0 283488 135 40 95 95 0 124 13 amapchunkpl 152 16244 0 16084 34 25 9 14 0 158 0 amappl16 192 14662 0 13590 114 50 64 66 0 8 8 amappl15 184 319 0 319 2 2 0 1 0 8 0 amappl14 176 754 0 748 1 0 1 1 0 8 0 amappl13 168 394 0 392 2 1 1 1 0 8 0 amappl12 160 104 0 97 1 0 1 1 0 8 0 amappl11 152 585 0 569 1 0 1 1 0 8 0 amappl10 144 303 0 298 1 0 1 1 0 8 0 amappl9 136 1044 0 1040 1 0 1 1 0 8 0 amappl8 128 583 0 546 2 0 2 2 0 8 0 amappl7 120 377 0 367 1 0 1 1 0 8 0 amappl6 112 563 0 552 1 0 1 1 0 8 0 amappl5 104 288 0 273 1 0 1 1 0 8 0 amappl4 96 2915 0 2880 1 0 1 1 0 8 0 amappl3 88 1278 0 1271 1 0 1 1 0 8 0 amappl2 80 22490 0 22418 3 1 2 3 0 8 0 amappl1 72 63033 0 62589 26 15 11 20 0 8 0 amappl 80 7826 0 7772 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 64 135 0 6 3 0 3 3 0 8 0 uaddrrnd 24 2825 0 2793 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2825 0 2793 1 0 1 1 0 8 0 vmmpekpl 168 36019 0 35982 3 1 2 2 0 8 0 vmmpepl 168 350033 0 347766 196 70 126 155 0 357 19 vmsppl 368 2808 0 2793 2 0 2 2 0 8 0 pdppl 4096 5657 0 5608 7 0 7 7 0 8 0 pvpl 32 821319 0 798556 291 69 222 222 0 265 34 pmappl 232 2824 0 2799 3 1 2 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 635 0 13 18 0 18 18 0 8 0