panic: kernel diagnostic assertion "!ISSET(rt->rt_flags, RTF_LOCAL)" failed: file "/syzkaller/managers/multicore/kernel/sys/netinet6/nd6.c", line 727 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 497148 3642 0 0 0 0 syz-executor.0 * 39472 3642 0 0 0x4000000 1K syz-executor.0 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821e91f1) at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff8224237e,ffffffff822397a7,2d7,ffffffff82228384) at __assert+0x2b sys/kern/subr_prf.c:154 nd6_free(fffffd80655b1008) at nd6_free+0x1cf sys/netinet6/nd6.c:727 nd6_purge(ffff800000a3d000) at nd6_purge+0x10f sys/netinet6/nd6.c:534 in6_ifdetach(ffff800000a3d000) at in6_ifdetach+0xa7 sys/netinet6/in6_ifattach.c:432 ifioctl(fffffd806f6f3e10,801169ac,ffff800021b7ef50,ffff800020ad7ae8) at ifioctl+0x1652 sys/net/if.c:1989 soo_ioctl(fffffd806fc82980,801169ac,ffff800021b7ef50,ffff800020ad7ae8) at soo_ioctl+0x27c sys/kern/sys_socket.c:138 sys_ioctl(ffff800020ad7ae8,ffff800021b7f068,ffff800021b7f0b0) at sys_ioctl+0x4a5 syscall(ffff800021b7f130) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021b7f130) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ae8d76540, count: 4 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 "!ISSET(rt->rt_flags, RTF_LOCAL)" failed: file "/syzkaller/managers/multicore/kernel/sys/netinet6/nd6.c", line 727 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821e91f1) at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff8224237e,ffffffff822397a7,2d7,ffffffff82228384) at __assert+0x2b sys/kern/subr_prf.c:154 nd6_free(fffffd80655b1008) at nd6_free+0x1cf sys/netinet6/nd6.c:727 nd6_purge(ffff800000a3d000) at nd6_purge+0x10f sys/netinet6/nd6.c:534 in6_ifdetach(ffff800000a3d000) at in6_ifdetach+0xa7 sys/netinet6/in6_ifattach.c:432 ifioctl(fffffd806f6f3e10,801169ac,ffff800021b7ef50,ffff800020ad7ae8) at ifioctl+0x1652 sys/net/if.c:1989 soo_ioctl(fffffd806fc82980,801169ac,ffff800021b7ef50,ffff800020ad7ae8) at soo_ioctl+0x27c sys/kern/sys_socket.c:138 sys_ioctl(ffff800020ad7ae8,ffff800021b7f068,ffff800021b7f0b0) at sys_ioctl+0x4a5 syscall(ffff800021b7f130) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021b7f130) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ae8d76540, count: -11 ddb{1}> show registers rdi 0xffffffff81030db7 db_enter+0x17 rsi 0x1fe0f acpi_pdirpa+0xbc77 rbp 0xffff800021b7ec10 rbx 0xffff800021b7ecc0 rdx 0x1fe10 acpi_pdirpa+0xbc78 rcx 0xffff800023bd0000 rax 0xffff800023bd0000 r8 0xffffffff8164a22f kprintf+0x16f r9 0x1 r10 0x25 r11 0x92d673ad5dc50425 r12 0x3000000008 r13 0xffff800021b7ec20 r14 0x100 r15 0x1 rip 0xffffffff81030db8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021b7ec00 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=39472 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020ad6eb8,0xffffffff8262fc20 process=0xffff800020a9cf20 user=0xffff800021b7a000, vmspace=0xfffffd807f0008a0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 3642 497148 34011 0 7 0 syz-executor.0 * 3642 39472 34011 0 7 0x4000000 syz-executor.0 34011 523669 94690 0 3 0x82 nanosleep syz-executor.0 64830 306964 94690 0 3 0x2 biowait syz-executor.1 94885 24282 0 0 3 0x14200 bored sosplice 94690 116276 50418 0 3 0x82 kqread syz-fuzzer 94690 191064 50418 0 3 0x4000082 nanosleep syz-fuzzer 94690 509664 50418 0 3 0x4000082 thrsleep syz-fuzzer 94690 451369 50418 0 3 0x4000082 thrsleep syz-fuzzer 94690 394882 50418 0 3 0x4000082 thrsleep syz-fuzzer 94690 207249 50418 0 3 0x4000082 thrsleep syz-fuzzer 94690 198907 50418 0 3 0x4000082 thrsleep syz-fuzzer 94690 139368 50418 0 3 0x4000082 thrsleep syz-fuzzer 94690 380623 50418 0 3 0x4000082 thrsleep syz-fuzzer 94690 374348 50418 0 3 0x4000082 thrsleep syz-fuzzer 50418 521209 90433 0 3 0x10008a pause ksh 90433 196708 3101 0 3 0x92 select sshd 7032 92527 1 0 3 0x100083 ttyin getty 3101 164624 1 0 3 0x80 select sshd 21578 460513 35295 74 3 0x100092 bpf pflogd 35295 127813 1 0 3 0x80 netio pflogd 18604 410574 78010 73 3 0x100090 kqread syslogd 78010 91355 1 0 3 0x100082 netio syslogd 47041 348678 0 0 3 0x14200 bored smr 55740 479740 0 0 3 0x14200 pgzero zerothread 96569 227386 0 0 3 0x14200 aiodoned aiodoned 73358 183881 0 0 3 0x14200 syncer update 39744 199242 0 0 3 0x14200 cleaner cleaner 42182 14683 0 0 3 0x14200 reaper reaper 65126 294800 0 0 3 0x14200 pgdaemon pagedaemon 45354 456405 0 0 3 0x14200 bored crynlk 66716 505028 0 0 3 0x14200 bored crypto 10513 144831 0 0 3 0x40014200 acpi0 acpi0 38760 416575 0 0 3 0x40014200 idle1 31873 489813 0 0 3 0x14200 bored softnet 88593 124288 0 0 2 0x14200 systqmp 99067 236931 0 0 3 0x14200 bored systq 54967 236111 0 0 3 0x40014200 bored softclock 55797 239099 0 0 3 0x40014200 idle0 1 220598 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 3642 (syz-executor.0) thread 0xffff800020ad7ae8 (39472) exclusive rwlock netlock r = 0 (0xffffffff8249c838) #0 witness_lock+0x52e sys/kern/subr_witness.c:1164 #1 ifioctl+0x104b sys/net/if.c:1978 #2 soo_ioctl+0x27c sys/kern/sys_socket.c:138 #3 sys_ioctl+0x4a5 #4 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #4 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #5 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82638db0) #0 witness_lock+0x52e sys/kern/subr_witness.c:1164 #1 soo_ioctl+0x26a sys/kern/sys_socket.c:138 #2 sys_ioctl+0x4a5 #3 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #3 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #4 Xsyscall+0x128 Process 64830 (syz-executor.1) thread 0xffff800020ad6018 (306964) exclusive rrwlock inode r = 0 (0xfffffd8068fdd708) #0 witness_lock+0x52e sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:453 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:602 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vget+0x1c8 sys/kern/vfs_subr.c:671 #6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1329 #8 ufs_lookup+0x14b7 sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90 #10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568 #11 namei+0x63c sys/kern/vfs_lookup.c:249 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1860 #13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8077b35818) #0 witness_lock+0x52e sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:453 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:602 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1860 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9531 6361K 6864K 78643K 11797 0 pcb 13 8K 8K 78643K 188 0 rtable 94 12K 12K 78643K 539 0 ifaddr 99 20K 20K 78643K 263 0 counters 43 33K 34K 78643K 101 0 ioctlops 0 0K 4K 78643K 1507 0 iov 0 0K 32K 78643K 98 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1626 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 9 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 178 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 639 0 sigio 0 0K 0K 78643K 15 0 proc 62 51K 95K 78643K 606 0 subproc 32 2K 2K 78643K 68 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 83 0 in_multi 96 4K 4K 78643K 231 0 ether_multi 1 0K 0K 78643K 31 0 mrt 0 0K 0K 78643K 2 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 290 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 121 71K 71K 78643K 3179 0 UVM aobj 45 2K 2K 78643K 47 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 133 0 NDP 14 0K 0K 78643K 53 0 temp 140 3026K 3102K 78643K 14574 0 kqueue 3 4K 18K 78643K 63 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 13 0 5 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 83 0 83 1 0 1 1 0 8 1 rtentry 112 89 0 55 2 0 2 2 0 8 0 unpcb 120 578 0 569 1 0 1 1 0 8 0 syncache 264 8 0 8 3 2 1 1 0 8 1 tcpqe 32 66 0 66 2 1 1 1 0 8 1 tcpcb 544 403 0 399 2 1 1 2 0 8 0 inpcb 280 1182 0 1173 3 1 2 2 0 8 1 nd6 48 14 0 10 1 0 1 1 0 8 0 pkpcb 40 5 0 5 2 2 0 1 0 8 0 ppxss 1128 5 0 5 3 3 0 1 0 8 0 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 69 0 36 1 0 1 1 0 8 0 pfstkey 112 69 0 36 2 1 1 2 0 8 0 pfstate 328 69 0 36 4 1 3 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 256 459 0 292 14 3 11 13 0 8 0 art_table 32 460 0 292 2 0 2 2 0 8 0 art_node 16 87 0 56 1 0 1 1 0 8 0 sysvmsgpl 40 37 0 16 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 176 0 166 1 0 1 1 0 8 0 shmpl 112 45 0 2 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2290 0 881 46 0 46 46 0 8 0 ffsino 272 2290 0 881 96 1 95 95 0 8 0 nchpl 144 3426 0 1818 61 0 61 61 0 8 0 uvmvnodes 72 2627 0 0 48 0 48 48 0 8 0 vnodes 208 2627 0 0 139 0 139 139 0 8 0 namei 1024 11094 0 11094 2 1 1 1 0 8 1 percpumem 16 61 0 29 1 0 1 1 0 8 0 vcpupl 1984 7 0 0 1 0 1 1 0 8 0 vmpool 560 9 0 2 1 0 1 1 0 8 0 scxspl 192 10502 0 10501 8 7 1 7 0 8 0 plimitpl 152 64 0 57 1 0 1 1 0 8 0 sigapl 424 849 0 819 4 0 4 4 0 8 0 futexpl 56 13425 0 13425 2 1 1 1 0 8 1 knotepl 112 158 0 139 1 0 1 1 0 8 0 kqueuepl 144 223 0 221 1 0 1 1 0 8 0 pipelkpl 48 292 0 282 1 0 1 1 0 8 0 pipepl 120 584 0 565 3 2 1 2 0 8 0 fdescpl 496 833 0 819 3 0 3 3 0 8 0 filepl 152 7031 0 6941 9 4 5 6 0 8 1 lockfpl 104 208 0 208 1 0 1 1 0 8 1 lockfspl 48 77 0 77 1 0 1 1 0 8 1 sessionpl 112 20 0 11 1 0 1 1 0 8 0 pgrppl 48 29 0 20 1 0 1 1 0 8 0 ucredpl 96 542 0 534 1 0 1 1 0 8 0 zombiepl 144 819 0 819 3 2 1 1 0 8 1 processpl 960 849 0 819 5 0 5 5 0 8 0 procpl 624 2284 0 2244 4 0 4 4 0 8 0 sosppl 128 16 0 16 4 3 1 1 0 8 1 sockpl 400 1870 0 1856 7 4 3 5 0 8 1 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 9 0 0 2 0 2 2 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 168 0 0 20 0 20 20 0 8 0 mtagpl 80 63 0 0 2 0 2 2 0 8 0 mbufpl 256 345 0 0 18 0 18 18 0 8 0 bufpl 280 7664 0 1396 448 0 448 448 0 8 0 anonpl 16 110824 0 93175 96 8 88 88 0 124 16 amapchunkpl 152 6039 0 5912 33 26 7 20 0 158 1 amappl16 192 4747 0 3770 78 21 57 62 0 8 8 amappl15 184 12 0 9 1 0 1 1 0 8 0 amappl14 176 85 0 81 2 1 1 1 0 8 0 amappl13 168 37 0 36 1 0 1 1 0 8 0 amappl12 160 18 0 14 2 1 1 1 0 8 0 amappl11 152 82 0 69 1 0 1 1 0 8 0 amappl10 144 25 0 19 1 0 1 1 0 8 0 amappl9 136 784 0 778 1 0 1 1 0 8 0 amappl8 128 755 0 720 4 2 2 2 0 8 0 amappl7 120 140 0 126 1 0 1 1 0 8 0 amappl6 112 21 0 19 2 1 1 1 0 8 0 amappl5 104 728 0 715 1 0 1 1 0 8 0 amappl4 96 546 0 517 2 1 1 2 0 8 0 amappl3 88 195 0 189 1 0 1 1 0 8 0 amappl2 80 5615 0 5552 3 1 2 3 0 8 0 amappl1 72 28510 0 28099 25 15 10 20 0 8 0 amappl 80 2581 0 2538 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 46 0 2 1 0 1 1 0 8 0 uaddrrnd 24 842 0 821 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 842 0 821 1 0 1 1 0 8 0 vmmpekpl 168 10553 0 10515 2 0 2 2 0 8 0 vmmpepl 168 109937 0 107865 162 47 115 130 0 357 18 vmsppl 368 841 0 821 2 0 2 2 0 8 0 pdppl 4096 1691 0 1649 6 0 6 6 0 8 0 pvpl 32 307933 0 287178 223 17 206 213 0 265 37 pmappl 232 841 0 821 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 185 0 13 5 0 5 5 0 8 0