Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct crash_mem. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Eric Biederman <ebiederm@xxxxxxxxxxxx> Cc: kexec@xxxxxxxxxxxxxxxxxxx Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> --- include/linux/crash_core.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/crash_core.h b/include/linux/crash_core.h index 3426f6eef60b..5126a4fecb44 100644 --- a/include/linux/crash_core.h +++ b/include/linux/crash_core.h @@ -131,7 +131,7 @@ static inline void __init reserve_crashkernel_generic(char *cmdline, struct crash_mem { unsigned int max_nr_ranges; unsigned int nr_ranges; - struct range ranges[]; + struct range ranges[] __counted_by(max_nr_ranges); }; extern int crash_exclude_mem_range(struct crash_mem *mem, -- 2.34.1 _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
