Hi,
The same kmod source code can be built on KASAN-disabled kernel (5.7.0), but after enable it with CONFIG_KASAN=y, the kmod can't build on the new installed KASAN-enabled kernel with below error message, seems no relevant answers for this issue with google:
root@build-ws:/home/mm/slab# make
make -C /lib/modules/5.7.0/build M=/home/mm/slab modules
make[1]: Entering directory '/home/linux-5.7'
CC [M] /home/mm/slab/tap_slab.o
MODPOST 1 modules
ERROR: modpost: "__asan_register_globals" [/home/mm/slab/tap_slab.ko] undefined!
ERROR: modpost: "__asan_unregister_globals" [/home/mm/slab/tap_slab.ko] undefined!
ERROR: modpost: "__asan_load8_noabort" [/home/mm/slab/tap_slab.ko] undefined!
scripts/Makefile.modpost:94: recipe for target '__modpost' failed
make[2]: *** [__modpost] Error 1
Makefile:1642: recipe for target 'modules' failed
make[1]: *** [modules] Error 2
make[1]: Leaving directory '/home/linux-5.7'
Makefile:6: recipe for target 'default' failed
make: *** [default] Error 2 === Regards, Richard