mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-09-21 12:11:49 +08:00
lib/ubsan: remove returns-nonnull-attribute checks
commit bac7a1fff7
upstream.
Similarly to type mismatch checks, new GCC 8.x and Clang also changed for
ABI for returns_nonnull checks. While we can update our code to conform
the new ABI it's more reasonable to just remove it. Because it's just
dead code, we don't have any single user of returns_nonnull attribute in
the whole kernel.
And AFAIU the advantage that this attribute could bring would be mitigated
by -fno-delete-null-pointer-checks cflag that we use to build the kernel.
So it's unlikely we will have a lot of returns_nonnull attribute in
future.
So let's just remove the code, it has no use.
[aryabinin@virtuozzo.com: fix warning]
Link: http://lkml.kernel.org/r/20180122165711.11510-1-aryabinin@virtuozzo.com
Link: http://lkml.kernel.org/r/20180119152853.16806-2-aryabinin@virtuozzo.com
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Sodagudi Prasad <psodagud@codeaurora.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
c5b5fbca5a
commit
2da066a76c
24
lib/ubsan.c
24
lib/ubsan.c
@ -143,11 +143,6 @@ static void val_to_string(char *str, size_t size, struct type_descriptor *type,
|
||||
}
|
||||
}
|
||||
|
||||
static bool location_is_valid(struct source_location *loc)
|
||||
{
|
||||
return loc->file_name != NULL;
|
||||
}
|
||||
|
||||
static DEFINE_SPINLOCK(report_lock);
|
||||
|
||||
static void ubsan_prologue(struct source_location *location,
|
||||
@ -354,25 +349,6 @@ void __ubsan_handle_type_mismatch_v1(struct type_mismatch_data_v1 *data,
|
||||
}
|
||||
EXPORT_SYMBOL(__ubsan_handle_type_mismatch_v1);
|
||||
|
||||
void __ubsan_handle_nonnull_return(struct nonnull_return_data *data)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
if (suppress_report(&data->location))
|
||||
return;
|
||||
|
||||
ubsan_prologue(&data->location, &flags);
|
||||
|
||||
pr_err("null pointer returned from function declared to never return null\n");
|
||||
|
||||
if (location_is_valid(&data->attr_location))
|
||||
print_source_location("returns_nonnull attribute specified in",
|
||||
&data->attr_location);
|
||||
|
||||
ubsan_epilogue(&flags);
|
||||
}
|
||||
EXPORT_SYMBOL(__ubsan_handle_nonnull_return);
|
||||
|
||||
void __ubsan_handle_vla_bound_not_positive(struct vla_bound_data *data,
|
||||
void *bound)
|
||||
{
|
||||
|
@ -57,11 +57,6 @@ struct nonnull_arg_data {
|
||||
int arg_index;
|
||||
};
|
||||
|
||||
struct nonnull_return_data {
|
||||
struct source_location location;
|
||||
struct source_location attr_location;
|
||||
};
|
||||
|
||||
struct vla_bound_data {
|
||||
struct source_location location;
|
||||
struct type_descriptor *type;
|
||||
|
@ -7,7 +7,6 @@ ifdef CONFIG_UBSAN
|
||||
CFLAGS_UBSAN += $(call cc-option, -fsanitize=signed-integer-overflow)
|
||||
CFLAGS_UBSAN += $(call cc-option, -fsanitize=bounds)
|
||||
CFLAGS_UBSAN += $(call cc-option, -fsanitize=object-size)
|
||||
CFLAGS_UBSAN += $(call cc-option, -fsanitize=returns-nonnull-attribute)
|
||||
CFLAGS_UBSAN += $(call cc-option, -fsanitize=bool)
|
||||
CFLAGS_UBSAN += $(call cc-option, -fsanitize=enum)
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user