https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78513
Bug ID: 78513
Summary: [7 Regression] Failure to build linux kernel with
KASAN support
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: ktkachov at gcc dot gnu.org
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org
Target Milestone: ---
I'm trying to build the Linux kernel 4.8.10, downloaded from kernel.org using
an aarch64-none-linux-gnu trunk toolchain (r242837).
I'm building a defconfig kernel with the additional:
CONFIG_KASAN=y
CONFIG_KASAN_OUTLINE=y
in the .config file to enable KASAN.
This works with a GCC 6 compiler. With trunk this fails to link with many
undefined references, for example:
net/built-in.o: In function `ethtool_set_per_queue':
ncsi-manage.c:(.text+0x5e2a8): undefined reference to
`__asan_unpoison_stack_memory'
ncsi-manage.c:(.text+0x5e398): undefined reference to
`__asan_poison_stack_memory'
I guess this has something to do with the libsanitizer merge?
