panic: kernel diagnostic asserWtiARonNI N"Gr:t ->SPrLt _NifOTa ->LiOfWaE_RiEDf pO N! =S NYUSCLALL"L fa3 il4 eEdX:I fT il0 e9 " Stopped at savectx+0xb1: movl $0,%gs:0x530 TID PID UID PRFLAGS PFLAGS CPU COMMAND 412183 74176 0 0 0x4000000 0 syz-executor.0 *449665 35026 74 0x100012 0 1 pflogd savectx(6,180,2fa3fa71eb0,3,2f792b03b16,2fa015cf000) at savectx+0xb1 end of kernel end trace frame: 0x7f7ffffc9f10, count: 14 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 savectx(6,180,2fa3fa71eb0,3,2f792b03b16,2fa015cf000) at savectx+0xb1 end of kernel end trace frame: 0x7f7ffffc9f10, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800020aab770 rbx 0 rdx 0xffff800020ac0778 rcx 0 rax 0x31 r8 0xffffffff819ab01f kprintf+0x16f r9 0x1 r10 0x25 r11 0xc2348d82d72ba633 r12 0 r13 0 r14 0xffff800020ac0778 r15 0 rip 0xffffffff819953f1 savectx+0xb1 cs 0x8 rflags 0x46 rsp 0xffff800020aab6f0 ss 0x10 savectx+0xb1: movl $0,%gs:0x530 ddb{1}> show proc PROC (pflogd) pid=449665 stat=onproc flags process=100012 proc=0 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020ac09f0,0xffff800020ac18d0 process=0xffff800020add180 user=0xffff800020aa6000, vmspace=0xfffffd806e7d3008 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 74176 45306 27044 0 2 0 syz-executor.0 74176 412183 27044 0 7 0x4000000 syz-executor.0 27044 401813 45094 0 3 0x82 nanosleep syz-executor.0 80459 316866 45094 0 3 0x82 piperd syz-executor.1 32140 163637 0 0 3 0x14200 bored sosplice 45094 352634 60596 0 3 0x82 thrsleep syz-fuzzer 45094 263981 60596 0 2 0x4000482 syz-fuzzer 45094 205937 60596 0 3 0x4000082 thrsleep syz-fuzzer 45094 87139 60596 0 3 0x4000082 thrsleep syz-fuzzer 45094 131508 60596 0 3 0x4000082 thrsleep syz-fuzzer 45094 117205 60596 0 3 0x4000082 thrsleep syz-fuzzer 45094 468623 60596 0 3 0x4000082 nanosleep syz-fuzzer 45094 231317 60596 0 3 0x4000082 thrsleep syz-fuzzer 45094 404875 60596 0 3 0x4000082 thrsleep syz-fuzzer 45094 467575 60596 0 3 0x4000082 kqread syz-fuzzer 60596 326318 62719 0 3 0x10008a pause ksh 62719 369900 34927 0 3 0x92 select sshd 1377 191391 1 0 3 0x100083 ttyin getty 34927 303486 1 0 3 0x80 select sshd *35026 449665 32783 74 7 0x100012 pflogd 32783 131215 1 0 3 0x80 netio pflogd 74289 251929 22456 73 3 0x100090 kqread syslogd 22456 410000 1 0 3 0x100082 netio syslogd 62203 414722 1 77 3 0x100090 poll dhclient 91861 183200 1 0 3 0x80 poll dhclient 44218 77362 0 0 3 0x14200 pgzero zerothread 49176 423745 0 0 3 0x14200 aiodoned aiodoned 27377 44064 0 0 3 0x14200 syncer update 47932 401542 0 0 3 0x14200 cleaner cleaner 41958 511123 0 0 3 0x14200 reaper reaper 84813 96072 0 0 3 0x14200 pgdaemon pagedaemon 92230 376885 0 0 3 0x14200 bored crynlk 61782 108771 0 0 3 0x14200 bored crypto 57531 283678 0 0 3 0x40014200 acpi0 acpi0 54170 192606 0 0 3 0x40014200 idle1 7536 56079 0 0 3 0x14200 bored softnet 89448 4987 0 0 3 0x14200 bored systqmp 70109 189496 0 0 3 0x14200 bored systq 71560 47191 0 0 2 0x40014200 softclock 30241 317970 0 0 3 0x40014200 idle0 95666 473585 0 0 3 0x14200 bored smr 1 469983 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 74176 (syz-executor.0) thread 0xffff800020abec70 (412183) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff826382b0) #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 dofilewritev+0x1b7 sys/kern/sys_generic.c:364 #8 sys_write+0x83 sys/kern/sys_generic.c:284 #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 (0xffffffff8247e1a8) #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 dofilewritev+0x1b7 sys/kern/sys_generic.c:364 #4 sys_write+0x83 sys/kern/sys_generic.c:284 #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 9486 6395K 6847K 78643K 11339 0 0 pcb 13 8K 8K 78643K 65 0 0 rtable 112 4K 4K 78643K 502 0 0 ifaddr 49 13K 13K 78643K 149 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1483 0 0 iov 0 0K 16K 78643K 777 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1218 77K 77K 78643K 1488 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 9 0 0 VM map 6 3K 3K 78643K 8 0 0 sem 12 0K 0K 78643K 1549 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 5 13K 25K 78643K 2558 0 0 sigio 0 0K 0K 78643K 2 0 0 proc 60 63K 95K 78643K 571 0 0 subproc 32 2K 2K 78643K 85 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 44 0 0 in_multi 34 2K 2K 78643K 77 0 0 ether_multi 1 0K 0K 78643K 4 0 0 mrt 0 0K 0K 78643K 2 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 60 265K 265K 78643K 60 0 0 exec 0 0K 1K 78643K 1355 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 54K 55K 78643K 7793 0 0 UVM aobj 42 4K 4K 78643K 42 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 56 0 0 NDP 10 0K 0K 78643K 42 0 0 temp 143 3559K 3635K 78643K 15307 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 18 0 11 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 27 0 25 1 0 1 1 0 8 0 rtentry 112 94 0 48 2 0 2 2 0 8 0 unpcb 120 1243 0 1231 2 1 1 2 0 8 0 syncache 264 8 0 8 3 3 0 1 0 8 0 tcpcb 544 142 0 138 3 0 3 3 0 8 2 inpcb 280 2277 0 2269 5 1 4 4 0 8 3 rttmr 72 1 0 1 1 1 0 1 0 8 0 ip6q 72 2 0 2 1 1 0 1 0 8 0 ip6af 40 6 0 6 1 1 0 1 0 8 0 nd6 48 13 0 9 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1128 20 0 20 3 2 1 1 0 8 1 pffrag 232 7 0 7 1 0 1 1 0 482 1 pffrnode 88 7 0 7 1 0 1 1 0 8 1 pffrent 40 226 0 226 1 0 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 55 0 23 1 0 1 1 0 8 0 pfstkey 112 55 0 23 1 0 1 1 0 8 0 pfstate 328 55 0 23 3 0 3 3 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 256 409 0 185 16 0 16 16 0 8 2 art_table 32 410 0 185 3 0 3 3 0 8 1 art_node 16 90 0 48 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 0 1 0 1 1 0 8 0 semupl 112 4 0 4 2 2 0 1 0 8 0 semapl 112 1547 0 1537 1 0 1 1 0 8 0 shmpl 112 40 0 0 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 4730 0 3328 46 0 46 46 0 8 0 ffsino 272 4730 0 3328 95 1 94 95 0 8 0 nchpl 144 12909 0 11310 61 0 61 61 0 8 0 uvmvnodes 72 4968 0 0 91 0 91 91 0 8 0 vnodes 208 4968 0 0 262 0 262 262 0 8 0 namei 1024 43654 0 43654 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 1 0 1 1 0 8 0 scxspl 192 22359 0 22359 9 8 1 7 0 8 1 plimitpl 152 36 0 28 1 0 1 1 0 8 0 sigapl 432 2749 0 2734 3 1 2 3 0 8 0 futexpl 56 93986 0 93986 1 0 1 1 0 8 1 knotepl 112 6074 0 6055 1 0 1 1 0 8 0 kqueuepl 104 8856 0 8854 1 0 1 1 0 8 0 pipepl 112 5502 0 5483 4 3 1 2 0 8 0 fdescpl 488 2750 0 2734 3 0 3 3 0 8 0 filepl 152 40983 0 40880 7 1 6 6 0 8 2 lockfpl 104 1527 0 1526 1 0 1 1 0 8 0 lockfspl 48 673 0 672 1 0 1 1 0 8 0 sessionpl 112 21 0 10 1 0 1 1 0 8 0 pgrppl 48 29 0 18 1 0 1 1 0 8 0 ucredpl 96 6551 0 6542 1 0 1 1 0 8 0 zombiepl 144 2735 0 2735 1 0 1 1 0 8 1 processpl 896 2767 0 2735 4 0 4 4 0 8 0 procpl 632 6890 0 6848 5 0 5 5 0 8 1 srpgc 64 6 0 6 2 1 1 1 0 8 1 sosppl 128 1094 0 1094 1 0 1 1 0 8 1 sockpl 384 4210 0 4188 11 5 6 8 0 8 3 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 167 0 0 19 0 19 19 0 8 0 mtagpl 80 23 0 0 1 0 1 1 0 8 0 mbufpl 256 362 0 0 19 0 19 19 0 8 0 bufpl 256 9064 0 2016 441 0 441 441 0 8 0 anonpl 16 208907 0 194806 95 18 77 90 0 124 2 amapchunkpl 152 12347 0 12202 14 7 7 11 0 158 1 amappl16 192 13379 0 12363 65 12 53 63 0 8 2 amappl14 176 175 0 172 1 0 1 1 0 8 0 amappl12 160 858 0 855 2 1 1 1 0 8 0 amappl11 152 68 0 52 1 0 1 1 0 8 0 amappl10 144 33 0 27 1 0 1 1 0 8 0 amappl9 136 658 0 652 1 0 1 1 0 8 0 amappl8 128 210 0 184 2 1 1 2 0 8 0 amappl7 120 57 0 49 1 0 1 1 0 8 0 amappl6 112 82 0 72 1 0 1 1 0 8 0 amappl5 104 997 0 983 1 0 1 1 0 8 0 amappl4 96 2873 0 2843 1 0 1 1 0 8 0 amappl3 88 381 0 370 1 0 1 1 0 8 0 amappl2 80 21828 0 21756 3 1 2 3 0 8 0 amappl1 72 68456 0 68020 25 15 10 20 0 8 0 amappl 80 7193 0 7146 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 41 0 0 1 0 1 1 0 8 0 uaddrrnd 24 2756 0 2734 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2756 0 2734 1 0 1 1 0 8 0 vmmpekpl 168 30627 0 30590 3 0 3 3 0 8 0 vmmpepl 168 332244 0 330104 175 41 134 134 0 357 36 vmsppl 368 2749 0 2734 2 0 2 2 0 8 0 pdppl 4096 5519 0 5476 6 0 6 6 0 8 0 pvpl 32 603116 0 585822 221 36 185 211 0 265 9 pmappl 232 2755 0 2736 3 1 2 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 619 0 4 18 0 18 18 0 8 0