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
*378649  18912      0           0  0x4000000    0  syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83412703) at panic+0x1cf sys/kern/subr_prf.c:198
__assert(ffffffff83452f45,ffffffff83432eff,84,ffffffff834a6d34) at __assert+0x29 sys/kern/subr_prf.c:-1
rtmap_grow(b5,21) at rtmap_grow+0x1f2
rtable_add(b4) at rtable_add+0x289 rtable_alloc sys/net/rtable.c:370 [inline]
rtable_add(b4) at rtable_add+0x289 sys/net/rtable.c:223
if_createrdomain(b4,ffff8000015db800) at if_createrdomain+0x40 sys/net/if.c:2046
ifioctl(ffff8000015937c0,8020699f,ffff8000380e9550,ffff80002a783c98) at ifioctl+0x1be2 sys/net/if.c:2395
sys_ioctl(ffff80002a783c98,ffff8000380e9720,ffff8000380e9670) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1
syscall(ffff8000380e9720) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff8000380e9720) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xcf50a4be360, count: 5
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>