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28abcc9631
When building ARCH=mips 32r2el_defconfig with CONFIG_UBSAN_ALIGNMENT:
ld.lld: error: undefined symbol: __ubsan_handle_alignment_assumption
referenced by slab.h:557 (include/linux/slab.h:557)
main.o:(do_initcalls) in archive init/built-in.a
referenced by slab.h:448 (include/linux/slab.h:448)
do_mounts_rd.o:(rd_load_image) in archive init/built-in.a
referenced by slab.h:448 (include/linux/slab.h:448)
do_mounts_rd.o:(identify_ramdisk_image) in archive init/built-in.a
referenced 1579 more times
Implement this for the kernel based on LLVM's
handleAlignmentAssumptionImpl because the kernel is not linked against
the compiler runtime.
Link: https://github.com/ClangBuiltLinux/linux/issues/1245
Link: https://github.com/llvm/llvm-project/blob/llvmorg-11.0.1/compiler-rt/lib/ubsan/ubsan_handlers.cpp#L151-L190
Link: https://lkml.kernel.org/r/20210127224451.2587372-1-nathan@kernel.org
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
96 lines
1.8 KiB
C
96 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LIB_UBSAN_H
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#define _LIB_UBSAN_H
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enum {
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type_kind_int = 0,
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type_kind_float = 1,
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type_unknown = 0xffff
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};
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struct type_descriptor {
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u16 type_kind;
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u16 type_info;
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char type_name[1];
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};
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struct source_location {
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const char *file_name;
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union {
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unsigned long reported;
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struct {
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u32 line;
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u32 column;
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};
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};
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};
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struct overflow_data {
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struct source_location location;
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struct type_descriptor *type;
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};
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struct type_mismatch_data {
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struct source_location location;
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struct type_descriptor *type;
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unsigned long alignment;
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unsigned char type_check_kind;
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};
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struct type_mismatch_data_v1 {
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struct source_location location;
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struct type_descriptor *type;
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unsigned char log_alignment;
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unsigned char type_check_kind;
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};
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struct type_mismatch_data_common {
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struct source_location *location;
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struct type_descriptor *type;
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unsigned long alignment;
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unsigned char type_check_kind;
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};
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struct nonnull_arg_data {
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struct source_location location;
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struct source_location attr_location;
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int arg_index;
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};
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struct out_of_bounds_data {
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struct source_location location;
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struct type_descriptor *array_type;
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struct type_descriptor *index_type;
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};
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struct shift_out_of_bounds_data {
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struct source_location location;
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struct type_descriptor *lhs_type;
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struct type_descriptor *rhs_type;
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};
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struct unreachable_data {
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struct source_location location;
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};
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struct invalid_value_data {
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struct source_location location;
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struct type_descriptor *type;
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};
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struct alignment_assumption_data {
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struct source_location location;
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struct source_location assumption_location;
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struct type_descriptor *type;
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};
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#if defined(CONFIG_ARCH_SUPPORTS_INT128)
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typedef __int128 s_max;
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typedef unsigned __int128 u_max;
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#else
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typedef s64 s_max;
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typedef u64 u_max;
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#endif
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#endif
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