panic: kernel diagnostic assertion "rt->rt_ifa->ifa_ifp != NULL" failed: file "/syzkalplaenri/cm:a kneagrnerels /mduilagtincoorstei/ck earnseselr/tisoysn /n"!e_tk/eroruntele_.clo"c, k_lihneled ()" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_fork.c", line 690 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 426959 66647 0 0 0x4000000 0 syz-executor.0 *320235 95044 0 0 0x4000000 1 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(ffffffff82247364,ffffffff82234246,2b2,ffffffff822153d4) at __assert+0x2b sys/kern/subr_prf.c:154 proc_trampoline_mp() at proc_trampoline_mp+0x123 end trace frame: 0x0, count: 11 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 "rt->rt_ifa->ifa_ifp != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/route.c", line 848 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(ffffffff82247364,ffffffff82234246,2b2,ffffffff822153d4) at __assert+0x2b sys/kern/subr_prf.c:154 proc_trampoline_mp() at proc_trampoline_mp+0x123 end trace frame: 0x0, count: -4 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002156d340 rbx 0xffff80002156d3f0 rdx 0xffff800020ab0018 rcx 0 rax 0 r8 0xffffffff8207ddaf kprintf+0x16f r9 0x1 r10 0x25 r11 0x657fe7b2bb2d737a r12 0x3000000008 r13 0xffff80002156d350 r14 0x104 r15 0x1 rip 0xffffffff813dc988 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002156d330 ss 0 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=320235 stat=onproc flags process=0 proc=4000000 pri=57, usrpri=57, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab0ee8,0xffff800020ab0c80 process=0xffff800020a8ae10 user=0xffff800021568000, vmspace=0xfffffd807f00a000 estcpu=7, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 66647 323866 36554 0 2 0 syz-executor.0 66647 426959 36554 0 7 0x4000000 syz-executor.0 95044 184338 48088 0 2 0 syz-executor.1 95044 390391 48088 0 3 0x4000080 fsleep syz-executor.1 *95044 320235 48088 0 7 0x4000000 syz-executor.1 48088 459466 83374 0 3 0x82 nanosleep syz-executor.1 82958 355882 0 0 3 0x14200 acct acct 36554 23985 83374 0 2 0x482 syz-executor.0 58598 191999 0 0 3 0x14200 bored sosplice 83374 206765 96973 0 3 0x82 kqread syz-fuzzer 83374 47569 96973 0 3 0x4000082 thrsleep syz-fuzzer 83374 181557 96973 0 3 0x4000082 thrsleep syz-fuzzer 83374 84244 96973 0 3 0x4000082 thrsleep syz-fuzzer 83374 27763 96973 0 3 0x4000082 thrsleep syz-fuzzer 83374 234628 96973 0 3 0x4000082 thrsleep syz-fuzzer 83374 239657 96973 0 3 0x4000082 thrsleep syz-fuzzer 83374 12784 96973 0 3 0x4000082 thrsleep syz-fuzzer 83374 229702 96973 0 3 0x4000082 thrsleep syz-fuzzer 83374 124423 96973 0 3 0x4000082 thrsleep syz-fuzzer 96973 179848 84832 0 3 0x10008a pause ksh 84832 57289 75237 0 3 0x92 select sshd 10204 271189 1 0 3 0x100083 ttyin getty 75237 485749 1 0 3 0x80 select sshd 89486 152128 69372 74 3 0x100092 bpf pflogd 69372 266006 1 0 3 0x80 netio pflogd 62076 174005 23405 73 3 0x100090 kqread syslogd 23405 387799 1 0 3 0x100082 netio syslogd 36148 514629 1 77 3 0x100090 poll dhclient 19463 514414 1 0 3 0x80 poll dhclient 7097 302844 0 0 2 0x14200 zerothread 19772 331499 0 0 3 0x14200 aiodoned aiodoned 86368 213270 0 0 3 0x14200 syncer update 60324 389405 0 0 3 0x14200 cleaner cleaner 73714 171946 0 0 3 0x14200 reaper reaper 72764 426024 0 0 3 0x14200 pgdaemon pagedaemon 44681 79611 0 0 3 0x14200 bored crynlk 83787 394108 0 0 3 0x14200 bored crypto 57919 19049 0 0 3 0x40014200 acpi0 acpi0 84425 345282 0 0 3 0x40014200 idle1 61148 307265 0 0 3 0x14200 bored softnet 58953 399498 0 0 3 0x14200 bored systqmp 51914 457961 0 0 3 0x14200 bored systq 70415 61476 0 0 2 0x40014200 softclock 67834 31375 0 0 3 0x40014200 idle0 72357 203667 0 0 3 0x14200 bored smr 1 154972 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 66647 (syz-executor.0) thread 0xffff800020ab0c70 (426959) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82676880) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rt_clone+0x5c sys/net/route.c:266 #2 rtalloc_mpath+0xba rt_match sys/net/route.c:244 [inline] #2 rtalloc_mpath+0xba sys/net/route.c:359 #3 ip_output+0x4f2 sys/netinet/ip_output.c:204 #4 rip_output+0x252 sys/netinet/raw_ip.c:289 #5 rip_usrreq+0x46a sys/netinet/raw_ip.c:538 #6 sosend+0x645 sys/kern/uipc_socket.c:524 #7 sendit+0x52b sys/kern/uipc_syscalls.c:662 #8 sys_sendto+0x80 sys/kern/uipc_syscalls.c:527 #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 rwlock netlock r = 0 (0xffffffff824ee388) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 solock+0x5a sys/kern/uipc_socket2.c:282 #2 sosend+0x51b sys/kern/uipc_socket.c:512 #3 sendit+0x52b sys/kern/uipc_syscalls.c:662 #4 sys_sendto+0x80 sys/kern/uipc_syscalls.c:527 #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9575 6568K 7981K 78643K 16955 0 0 pcb 13 8K 8K 78643K 203 0 0 rtable 117 5K 6K 78643K 908 0 0 ifaddr 81 17K 18K 78643K 286 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1501 0 0 iov 0 0K 32K 78643K 191 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1226 77K 77K 78643K 2951 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 15 0 0 VM map 2 1K 1K 78643K 8 0 0 sem 12 0K 0K 78643K 368 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 6 17K 25K 78643K 1060 0 0 sigio 0 0K 0K 78643K 8 0 0 proc 62 63K 95K 78643K 704 0 0 subproc 32 2K 2K 78643K 119 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 555 0 0 in_multi 30 2K 2K 78643K 120 0 0 ether_multi 1 0K 0K 78643K 7 0 0 mrt 0 0K 0K 78643K 5 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 66 291K 291K 78643K 66 0 0 exec 0 0K 1K 78643K 397 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 115 22K 24K 78643K 4523 0 0 UVM aobj 33 4K 4K 78643K 35 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 262 0 0 NDP 20 0K 0K 78643K 85 0 0 temp 216 3560K 3634K 78643K 58022 0 0 kqueue 0 0K 0K 78643K 6 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 29 0 23 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 84 0 81 1 0 1 1 0 8 0 rtentry 112 168 0 121 2 0 2 2 0 8 0 unpcb 120 480 0 469 1 0 1 1 0 8 0 syncache 264 8 0 8 3 3 0 1 0 8 0 tcpqe 32 6444 0 6444 2 2 0 1 0 8 0 tcpcb 544 867 0 861 3 2 1 2 0 8 0 inpcb 280 1599 0 1589 4 2 2 2 0 8 1 rttmr 72 2 0 2 2 1 1 1 0 8 1 nd6 48 33 0 28 1 0 1 1 0 8 0 pkpcb 40 8 0 8 3 3 0 1 0 8 0 ppxss 1128 34 0 34 3 2 1 1 0 8 1 pffrag 232 13 0 13 5 5 0 1 0 482 0 pffrnode 88 13 0 13 5 5 0 1 0 8 0 pffrent 40 203 0 203 5 5 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 96 0 52 1 0 1 1 0 8 0 pfstkey 112 96 0 52 2 0 2 2 0 8 0 pfstate 328 96 0 52 6 0 6 6 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 256 928 0 663 28 1 27 27 0 8 6 art_table 32 929 0 663 4 0 4 4 0 8 0 art_node 16 164 0 120 1 0 1 1 0 8 0 sysvmsgpl 40 40 0 30 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 366 0 356 1 0 1 1 0 8 0 shmpl 112 33 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 3014 0 1607 46 0 46 46 0 8 0 ffsino 272 3014 0 1607 95 0 95 95 0 8 0 nchpl 144 4926 0 3311 61 0 61 61 0 8 0 uvmvnodes 72 4526 0 0 83 0 83 83 0 8 0 vnodes 208 4526 0 0 239 0 239 239 0 8 0 namei 1024 16253 0 16253 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vmpool 552 6 0 6 3 3 0 1 0 8 0 scsiplug 64 1 0 1 1 1 0 1 0 8 0 scxspl 192 14222 0 14222 14 13 1 7 0 8 1 plimitpl 152 99 0 91 1 0 1 1 0 8 0 sigapl 432 1245 0 1229 3 1 2 3 0 8 0 futexpl 56 25125 0 25124 1 0 1 1 0 8 0 knotepl 112 299 0 280 1 0 1 1 0 8 0 kqueuepl 104 310 0 307 1 0 1 1 0 8 0 pipepl 112 836 0 813 4 3 1 2 0 8 0 fdescpl 488 1246 0 1229 3 0 3 3 0 8 0 filepl 152 10700 0 10591 13 8 5 7 0 8 0 lockfpl 104 379 0 378 1 0 1 1 0 8 0 lockfspl 48 136 0 135 1 0 1 1 0 8 0 sessionpl 112 23 0 12 1 0 1 1 0 8 0 pgrppl 48 38 0 27 1 0 1 1 0 8 0 ucredpl 96 1206 0 1197 1 0 1 1 0 8 0 zombiepl 144 1231 0 1231 3 2 1 1 0 8 1 processpl 896 1265 0 1231 4 0 4 4 0 8 0 procpl 632 3493 0 3447 6 1 5 5 0 8 1 srpgc 64 7 0 7 3 2 1 1 0 8 1 sosppl 128 23 0 23 4 4 0 1 0 8 0 sockpl 384 2185 0 2161 10 6 4 5 0 8 1 mcl64k 65536 19 0 0 3 1 2 3 0 8 0 mcl16k 16384 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 8 0 0 1 0 1 1 0 8 0 mcl9k 9216 8 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 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 167 0 0 19 0 19 19 0 8 0 mtagpl 80 420 0 0 9 0 9 9 0 8 0 mbufpl 256 1011 0 0 62 1 61 61 0 8 0 bufpl 256 9090 0 2042 441 0 441 441 0 8 0 anonpl 16 133088 0 120405 90 19 71 87 0 124 0 amapchunkpl 152 7922 0 7803 15 7 8 12 0 158 0 amappl16 192 5573 0 4605 70 21 49 61 0 8 0 amappl15 184 683 0 679 1 0 1 1 0 8 0 amappl14 176 56 0 55 2 1 1 1 0 8 0 amappl13 168 222 0 221 1 0 1 1 0 8 0 amappl12 160 7 0 5 2 1 1 1 0 8 0 amappl11 152 285 0 267 1 0 1 1 0 8 0 amappl10 144 52 0 48 1 0 1 1 0 8 0 amappl9 136 846 0 840 1 0 1 1 0 8 0 amappl8 128 388 0 360 1 0 1 1 0 8 0 amappl7 120 97 0 90 1 0 1 1 0 8 0 amappl6 112 299 0 282 1 0 1 1 0 8 0 amappl5 104 180 0 165 1 0 1 1 0 8 0 amappl4 96 1581 0 1552 1 0 1 1 0 8 0 amappl3 88 146 0 141 1 0 1 1 0 8 0 amappl2 80 9281 0 9196 3 1 2 3 0 8 0 amappl1 72 37425 0 36961 27 16 11 20 0 8 0 amappl 80 3831 0 3788 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 34 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1252 0 1229 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1252 0 1229 1 0 1 1 0 8 0 vmmpekpl 168 13643 0 13612 2 0 2 2 0 8 0 vmmpepl 168 161336 0 159116 206 77 129 134 0 357 32 vmsppl 368 1245 0 1229 2 0 2 2 0 8 0 pdppl 4096 2511 0 2470 7 1 6 6 0 8 0 pvpl 32 404690 0 388688 229 59 170 203 0 265 5 pmappl 232 1251 0 1235 4 3 1 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 674 0 10 19 0 19 19 0 8 0