panic: malloc: allocation too large, type = 2, size = 14844568728

Stopped at      db_enter+0x18:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*370786  90055      0           0  0x4000000    0  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:208
malloc(374ce2498,2,2) at malloc+0xa13 sys/kern/kern_malloc.c:339
wsmux_getmux(6e99c492) at wsmux_getmux+0x71 sys/dev/wscons/wsmux.c:152
wsmux_add_mux(6e99c492,ffff800001981c00) at wsmux_add_mux+0x2f sys/dev/wscons/wsmux.c:594
VOP_IOCTL(fffffd802be35ec0,80085761,ffff800014a30900,f,fffffd803f7c6a80,ffff8000ffff2270) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290
vn_ioctl(fffffd803e0dd540,80085761,ffff800014a30900,ffff8000ffff2270) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512
sys_ioctl(ffff8000ffff2270,ffff800014a30a48,ffff800014a30a30) at sys_ioctl+0x638
syscall(ffff800014a30ae0) at syscall+0x541
Xsyscall(6,0,ffffffffffffff86,0,3,3a445048010) at Xsyscall+0x128
end of kernel
end trace frame: 0x3a6a7dc25f0, count: 5
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