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ubsan: Remove vla bound checks.

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The kernel the kernel is built with -Wvla for some time, so is not
supposed to have any variable length arrays.  Remove vla bounds checking
from ubsan since it's useless now.

Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrey Ryabinin 2019-05-06 13:45:27 +03:00 committed by Linus Torvalds
parent f0996bc297
commit 9a91ad929f
3 changed files with 0 additions and 24 deletions
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18
lib/ubsan.c
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@ -349,24 +349,6 @@ void __ubsan_handle_type_mismatch_v1(struct type_mismatch_data_v1 *data,
}
EXPORT_SYMBOL(__ubsan_handle_type_mismatch_v1);
void __ubsan_handle_vla_bound_not_positive(struct vla_bound_data *data,
void *bound)
{
unsigned long flags;
char bound_str[VALUE_LENGTH];
if (suppress_report(&data->location))
return;
ubsan_prologue(&data->location, &flags);
val_to_string(bound_str, sizeof(bound_str), data->type, bound);
pr_err("variable length array bound value %s <= 0\n", bound_str);
ubsan_epilogue(&flags);
}
EXPORT_SYMBOL(__ubsan_handle_vla_bound_not_positive);
void __ubsan_handle_out_of_bounds(struct out_of_bounds_data *data, void *index)
{
unsigned long flags;

5
lib/ubsan.h
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@ -57,11 +57,6 @@ struct nonnull_arg_data {
int arg_index;
};
struct vla_bound_data {
struct source_location location;
struct type_descriptor *type;
};
struct out_of_bounds_data {
struct source_location location;
struct type_descriptor *array_type;

1
scripts/Makefile.ubsan
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@ -3,7 +3,6 @@ ifdef CONFIG_UBSAN
CFLAGS_UBSAN += $(call cc-option, -fsanitize=shift)
CFLAGS_UBSAN += $(call cc-option, -fsanitize=integer-divide-by-zero)
CFLAGS_UBSAN += $(call cc-option, -fsanitize=unreachable)
CFLAGS_UBSAN += $(call cc-option, -fsanitize=vla-bound)
CFLAGS_UBSAN += $(call cc-option, -fsanitize=signed-integer-overflow)
CFLAGS_UBSAN += $(call cc-option, -fsanitize=bounds)
CFLAGS_UBSAN += $(call cc-option, -fsanitize=object-size)