panic: kernel diagnostic assertion "map->limit == rtmap_limit" failed: file "/syzkaller/managers/main/kernel/sys/net/rtable.c", line 132 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *346514 4978 0 0 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834358e3) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833dfa57,ffffffff833ac401,84,ffffffff8342b1c3) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(6,21) at rtmap_grow+0x1f3 sys/net/rtable.c:132 rtable_add(5) at rtable_add+0x289 rtable_alloc sys/net/rtable.c:370 [inline] rtable_add(5) at rtable_add+0x289 sys/net/rtable.c:223 route_output(fffffd8065c7fa00,ffff800001423ce8) at route_output+0x525 sys/net/rtsock.c:783 route_send(ffff800001423ce8,fffffd8065c7fa00,0,0) at route_send+0xd7 sys/net/rtsock.c:339 sosend(ffff800001423ce8,0,ffff800031d07c08,0,0,0) at sosend+0x824 sys/kern/uipc_socket.c:-1 sendit(ffff80002a7f1c50,3,ffff800031d07d00,0,ffff800031d07db0) at sendit+0x721 sys/kern/uipc_syscalls.c:779 sys_sendto(ffff80002a7f1c50,ffff800031d07e60,ffff800031d07db0) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:557 syscall(ffff800031d07e60) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800031d07e60) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8aa1bfaf00, count: 3 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: kernel diagnostic assertion "map->limit == rtmap_limit" failed: file "/syzkaller/managers/main/kernel/sys/net/rtable.c", line 132 ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834358e3) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833dfa57,ffffffff833ac401,84,ffffffff8342b1c3) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(6,21) at rtmap_grow+0x1f3 sys/net/rtable.c:132 rtable_add(5) at rtable_add+0x289 rtable_alloc sys/net/rtable.c:370 [inline] rtable_add(5) at rtable_add+0x289 sys/net/rtable.c:223 route_output(fffffd8065c7fa00,ffff800001423ce8) at route_output+0x525 sys/net/rtsock.c:783 route_send(ffff800001423ce8,fffffd8065c7fa00,0,0) at route_send+0xd7 sys/net/rtsock.c:339 sosend(ffff800001423ce8,0,ffff800031d07c08,0,0,0) at sosend+0x824 sys/kern/uipc_socket.c:-1 sendit(ffff80002a7f1c50,3,ffff800031d07d00,0,ffff800031d07db0) at sendit+0x721 sys/kern/uipc_syscalls.c:779 sys_sendto(ffff80002a7f1c50,ffff800031d07e60,ffff800031d07db0) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:557 syscall(ffff800031d07e60) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800031d07e60) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8aa1bfaf00, count: -12 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff800031d07820 rbx 0x21 rdx 0 rcx 0 rax 0xffff80002a7f1c50 r8 0 r9 0x8080808080808080 r10 0x79d842732f5d3e66 r11 0x28b30f0372dbd66f r12 0 r13 0x1 r14 0 r15 0x1 rip 0xffffffff82edf295 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800031d07810 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=346514 pid=4978 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=76, usrpri=77, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7f1210,0xffff80002a7f19d0 process=0xffff800036915238 user=0xffff800031d02000, vmspace=0xfffffd806c7fd9e8 estcpu=27, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 70572 3133 43520 0 2 0 syz-executor 70572 72942 43520 0 3 0x4000080 fsleep syz-executor 70572 4683 43520 0 3 0x4000080 fsleep syz-executor 70572 246837 43520 0 2 0x4000000 syz-executor 45786 68687 9703 0 2 0 syz-executor 45786 477204 9703 0 2 0x4000000 syz-executor 13867 387806 91449 0 2 0 syz-executor 13867 309379 91449 0 3 0x4000080 fsleep syz-executor 46747 238494 61010 0 2 0 syz-executor 46747 46219 61010 0 3 0x4000080 fsleep syz-executor 46747 108656 61010 0 2 0x4000000 syz-executor 46747 435666 61010 0 3 0x4000080 fsleep syz-executor 4978 289711 7693 0 2 0 syz-executor * 4978 346514 7693 0 7 0x4000000 syz-executor 2883 489672 13330 0 2 0xc90 syz-executor 2883 200387 13330 0 3 0x4000090 kqsel syz-executor 2883 326642 13330 0 3 0x4000090 fsleep syz-executor 13397 198893 0 0 3 0x14200 bored sosplice 61010 377890 47902 0 2 0x3 syz-executor 36321 323563 47902 0 2 0x2 syz-executor 43520 248490 47902 0 2 0x3 syz-executor 22992 131146 47902 0 3 0x82 wait syz-executor 13330 19777 47902 0 2 0xc82 syz-executor 9703 433713 47902 0 2 0x3 syz-executor 7693 451096 47902 0 2 0x3 syz-executor 91449 197763 47902 0 2 0x3 syz-executor 47902 353893 60751 0 3 0x82 kqread syz-executor 60751 127818 28120 0 3 0x10008a sigsusp ksh 28120 496906 54024 0 3 0x98 kqread sshd-session 54024 503289 72627 0 3 0x92 kqread sshd-session 80349 1033 1 0 3 0x100083 ttyin getty 72627 465499 1 0 3 0x88 kqread sshd 9394 341606 22374 73 3 0x1100090 kqread syslogd 22374 473891 1 0 3 0x100082 sbwait syslogd 27301 162702 1 0 3 0x100080 kqread resolvd 42000 195121 60265 77 3 0x100092 kqread dhcpleased 39455 340239 60265 77 3 0x100092 kqread dhcpleased 60265 284397 1 0 3 0x80 kqread dhcpleased 55489 500682 0 0 3 0x14200 bored smr 36660 305959 0 0 2 0x14200 zerothread 77646 121146 0 0 3 0x14200 aiodoned aiodoned 23172 310495 0 0 3 0x14200 syncer update 67347 118890 0 0 3 0x14200 cleaner cleaner 90009 470741 0 0 3 0x14200 reaper reaper 12544 188080 0 0 3 0x14200 pgdaemon pagedaemon 23245 357312 0 0 3 0x14200 bored viomb 27964 414998 0 0 3 0x40014200 acpi0 acpi0 22823 442802 0 0 3 0x14200 bored softnet3 10056 459280 0 0 3 0x14200 bored softnet2 2609 493815 0 0 3 0x14200 bored softnet1 87996 56163 0 0 3 0x14200 bored softnet0 60572 259888 0 0 3 0x14200 bored systqmp 73591 207983 0 0 3 0x14200 bored systq 55694 411257 0 0 2 0x40014200 softclock 86355 242226 0 0 3 0x40014200 idle0 1 512955 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10174 11043K 11322K 166960K 11693 0 pcb 18 13K 14K 166960K 77 0 rtable 250 8K 8K 166960K 383 0 pf 31 13K 14K 166960K 53 0 ifaddr 42 7K 8K 166960K 58 0 ifgroup 55 2K 2K 166960K 81 0 sysctl 1 1K 9K 166960K 5 0 counters 32 17K 18K 166960K 48 0 ioctlops 0 0K 4K 166960K 49 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1402 88K 89K 166960K 1489 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 3 0K 0K 166960K 36 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 97K 166960K 210 0 proc 60 59K 124K 166960K 478 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 7 0 in_multi 99 7K 7K 166960K 102 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 2K 166960K 351 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 226 151K 161K 166960K 3444 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 39 78K 96K 166960K 1242 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 10 0 NDP 11 0K 2K 166960K 36 0 temp 40 8663K 8729K 166960K 9630 0 kqueue 13 20K 25K 166960K 40 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 43 0 38 1 0 1 1 0 8 0 rtentry 136 116 0 5 4 0 4 4 0 8 0 unpcb 144 72 0 57 1 0 1 1 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 35 0 30 1 0 1 1 0 8 0 arp 88 18 0 0 1 0 1 1 0 8 0 inpcb 328 164 0 153 4 2 2 4 0 8 1 nd6 104 26 0 1 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 13 0 13 1 0 1 1 0 8 1 pppxif 1384 3 0 3 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 469 0 14 29 0 29 29 0 8 0 art_table 40 470 0 14 5 0 5 5 0 8 0 art_node 32 116 0 15 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semapl 112 33 0 32 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1703 0 203 95 0 95 95 0 8 0 ffsino 248 1703 0 203 95 0 95 95 0 8 0 nchpl 144 1994 0 317 63 0 63 63 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 uvmvnodes 80 1884 0 0 39 0 39 39 0 8 0 vnodes 216 1884 0 0 105 0 105 105 0 8 0 namei 1024 6021 0 6020 3 2 1 2 0 8 0 kstatmem 264 40 0 18 3 0 3 3 0 8 1 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 6570 0 6570 8 7 1 8 1 8 1 plimitpl 152 40 0 24 1 0 1 1 0 8 0 sigapl 424 491 0 444 7 1 6 7 0 8 0 knotepl 120 5888 0 5841 9 0 9 9 0 8 6 kqueuepl 184 63 0 52 1 0 1 1 0 8 0 pipepl 296 102 0 75 3 0 3 3 0 8 0 fdescpl 440 474 0 444 5 1 4 5 0 8 0 filepl 120 1876 0 1663 10 1 9 10 0 8 1 lockfpl 104 42 0 40 1 0 1 1 0 8 0 lockfspl 48 22 0 20 1 0 1 1 0 8 0 sessionpl 144 21 0 13 1 0 1 1 0 8 0 pgrppl 48 29 0 13 1 0 1 1 0 8 0 ucredpl 104 169 0 156 1 0 1 1 0 8 0 zombiepl 144 477 0 476 1 0 1 1 0 8 0 processpl 1160 491 0 444 4 0 4 4 0 8 0 procpl 656 628 0 569 6 0 6 6 0 8 1 sockpl 528 281 0 250 5 2 3 5 0 8 0 mcl8k 8192 4 0 4 1 1 0 1 0 8 0 mcl4k 4096 2510 0 2460 16 8 8 16 0 8 1 mcl2k 2048 299 0 297 1 0 1 1 0 8 0 mtagpl 96 8 0 4 1 0 1 1 0 8 0 mbufpl 256 4751 0 4572 14 0 14 14 0 8 1 bufpl 280 2462 0 118 168 0 168 168 0 8 0 anonpl 24 70010 0 66871 22 0 22 22 0 187 0 amapchunkpl 152 9571 0 9088 25 1 24 24 0 158 5 amappl16 200 599 0 576 3 1 2 3 0 8 0 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 101 0 91 1 0 1 1 0 8 0 amappl13 176 3 0 3 1 1 0 1 0 8 0 amappl12 168 1125 0 1096 3 1 2 3 0 8 0 amappl11 160 44 0 34 1 0 1 1 0 8 0 amappl10 152 3 0 3 1 1 0 1 0 8 0 amappl9 144 254 0 254 1 1 0 1 0 8 0 amappl8 136 17 0 16 1 0 1 1 0 8 0 amappl7 128 125 0 115 1 0 1 1 0 8 0 amappl6 120 164 0 161 1 0 1 1 0 8 0 amappl5 112 127 0 120 1 0 1 1 0 8 0 amappl4 104 283 0 268 1 0 1 1 0 8 0 amappl3 96 1675 0 1567 3 0 3 3 0 8 0 amappl2 88 602 0 549 2 0 2 2 0 8 0 amappl1 80 8158 0 7612 13 0 13 13 0 8 1 amappl 88 2794 0 2631 5 0 5 5 0 92 1 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 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 72 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 474 0 444 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 474 0 444 1 0 1 1 0 8 0 vmmpekpl 168 5432 0 5397 2 0 2 2 0 8 0 vmmpepl 168 35131 0 33296 83 1 82 82 0 357 0 vmsppl 360 473 0 444 4 1 3 4 0 8 0 rwobjpl 32 13205 0 10483 22 0 22 22 0 8 0 pdppl 4096 955 0 888 101 34 67 83 0 8 0 pvpl 32 200042 0 191653 81 2 79 79 0 265 3 pmappl 216 473 0 444 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 269 0 48 7 0 7 7 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834358e3) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833dfa57,ffffffff833ac401,84,ffffffff8342b1c3) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(6,21) at rtmap_grow+0x1f3 sys/net/rtable.c:132 rtable_add(5) at rtable_add+0x289 rtable_alloc sys/net/rtable.c:370 [inline] rtable_add(5) at rtable_add+0x289 sys/net/rtable.c:223 route_output(fffffd8065c7fa00,ffff800001423ce8) at route_output+0x525 sys/net/rtsock.c:783 route_send(ffff800001423ce8,fffffd8065c7fa00,0,0) at route_send+0xd7 sys/net/rtsock.c:339 sosend(ffff800001423ce8,0,ffff800031d07c08,0,0,0) at sosend+0x824 sys/kern/uipc_socket.c:-1 sendit(ffff80002a7f1c50,3,ffff800031d07d00,0,ffff800031d07db0) at sendit+0x721 sys/kern/uipc_syscalls.c:779 sys_sendto(ffff80002a7f1c50,ffff800031d07e60,ffff800031d07db0) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:557 syscall(ffff800031d07e60) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800031d07e60) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8aa1bfaf00, count: -12 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834358e3) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833dfa57,ffffffff833ac401,84,ffffffff8342b1c3) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(6,21) at rtmap_grow+0x1f3 sys/net/rtable.c:132 rtable_add(5) at rtable_add+0x289 rtable_alloc sys/net/rtable.c:370 [inline] rtable_add(5) at rtable_add+0x289 sys/net/rtable.c:223 route_output(fffffd8065c7fa00,ffff800001423ce8) at route_output+0x525 sys/net/rtsock.c:783 route_send(ffff800001423ce8,fffffd8065c7fa00,0,0) at route_send+0xd7 sys/net/rtsock.c:339 sosend(ffff800001423ce8,0,ffff800031d07c08,0,0,0) at sosend+0x824 sys/kern/uipc_socket.c:-1 sendit(ffff80002a7f1c50,3,ffff800031d07d00,0,ffff800031d07db0) at sendit+0x721 sys/kern/uipc_syscalls.c:779 sys_sendto(ffff80002a7f1c50,ffff800031d07e60,ffff800031d07db0) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:557 syscall(ffff800031d07e60) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800031d07e60) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8aa1bfaf00, count: -12