Back mappings in vmalloc space with real shadow memory
configname: CONFIG_KASAN_VMALLOC
Linux Kernel Configuration
└─>Kernel hacking
└─>Memory Debugging
└─>KASAN: runtime memory debugger
└─>Back mappings in vmalloc space with real shadow memory
In linux kernel since version 4.14.326 (release Date: 2023-09-23)
By default, the shadow region for vmalloc space is the read-only
zero page. This means that KASAN cannot detect errors involving
vmalloc space.
Enabling this option will hook in to vmap/vmalloc and back those
mappings with real shadow memory allocated on demand. This allows
for KASAN to detect more sorts of errors (and to support vmapped
stacks), but at the cost of higher memory usage.
zero page. This means that KASAN cannot detect errors involving
vmalloc space.
Enabling this option will hook in to vmap/vmalloc and back those
mappings with real shadow memory allocated on demand. This allows
for KASAN to detect more sorts of errors (and to support vmapped
stacks), but at the cost of higher memory usage.