kernel: protection fault trap, code=0
Stopped at      malloc+0x855:   movq    0x8(%rbx),%r14
ddb> 
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
the kernel did not panic
ddb> show kasan
No such command
ddb> trace
malloc(c,7f,1) at malloc+0x855 sys/kern/kern_malloc.c:294
ktrgenio(ffff8000398d4d18,f8,1,ffff800000c575b0,4) at ktrgenio+0x141 sys/kern/kern_ktrace.c:249
dofilewritev(ffff8000398d4d18,f8,ffff80002a861928,0,ffff80002a8619d0) at dofilewritev+0x588 sys/kern/sys_generic.c:402
sys_write(ffff8000398d4d18,ffff80002a861a80,ffff80002a8619d0) at sys_write+0xa2 sys/kern/sys_generic.c:300
syscall(ffff80002a861a80) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a861a80) at syscall+0x962 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7e25a980d6a0, count: -6
ddb> show registers
rdi               0xcda73e5ee5a63976
rsi                                0
rbp               0xffff80002a861760
rbx               0xcda73e5ee5a63976
rdx                                0
rcx                              0x4
rax               0xffff8000398d4d18
r8                               0x4
r9                              0x20
r10               0x74e72bc693486e9d
r11               0x6ad94aded49d9ba7
r12                                0
r13               0xffffffff839d3810    kmemstats+0x1fc0
r14                        0xa30c333    __kernel_phys_end+0x670c333
r15               0xcda73e5ee5a63976
rip               0xffffffff81173635    malloc+0x855
cs                               0x8
rflags                       0x10282    __ALIGN_SIZE+0xf282
rsp               0xffff80002a8616a0
ss                              0x10
malloc+0x855:   movq    0x8(%rbx),%r14
ddb>