login: df4580: malloc-type limit ~389 MB; looping kmalloc(32 MB, M_WAITOK|M_ZERO) [no M_NULLOK], GFP_KERNEL-equivalent
df4580: alloc #0 (type usage ~0 MB)
df4580: alloc #1 (type usage ~32 MB)
df4580: alloc #2 (type usage ~64 MB)
df4580: alloc #3 (type usage ~96 MB)
df4580: alloc #4 (type usage ~128 MB)
df4580: alloc #5 (type usage ~160 MB)
df4580: alloc #6 (type usage ~192 MB)
df4580: alloc #7 (type usage ~224 MB)
df4580: alloc #8 (type usage ~256 MB)
df4580: alloc #9 (type usage ~288 MB)
df4580: alloc #10 (type usage ~320 MB)
df4580: alloc #11 (type usage ~352 MB)
df4580: alloc #12 (type usage ~384 MB)
df4580: alloc #13 (type usage ~416 MB)
panic: df4580: malloc limit exceeded
cpuid = 1
Trace beginning at frame 0xfffff8011833b748
_kmalloc() at _kmalloc+0xb09 0xffffffff806578c9 
_kmalloc() at _kmalloc+0xb09 0xffffffff806578c9 
df4580_modevent() at df4580_modevent+0xd8 0xffffffff826000d8 
module_register_init() at module_register_init+0x49 0xffffffff806232e9 
linker_load_file.part.3() at linker_load_file.part.3+0x1b9 0xffffffff80624619 
linker_load_module() at linker_load_module+0x116 0xffffffff80625e16 
Debugger("panic")

CPU1 stopping CPUs: 0x0000003d
 stopped
Stopped at      Debugger+0x7c:  movb    $0,0xbdaf09(%rip)
db>