Messages in this thread Patch in this message | | | Date | Fri, 21 Apr 2023 21:54:36 +0300 | From | Alexey Dobriyan <> | Subject | [PATCH] ELF: use __builtin_mul_overflow() more |
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__builtin_mul_overflow() can do multiplication and overflow check in one line.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> ---
fs/binfmt_elf.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
--- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -1651,9 +1651,8 @@ static int fill_files_note(struct memelfnote *note, struct coredump_params *cprm /* *Estimated* file count and total data size needed */ count = cprm->vma_count; - if (count > UINT_MAX / 64) + if (__builtin_mul_overflow(count, 64, &size)) return -EINVAL; - size = count * 64; names_ofs = (2 + 3 * count) * sizeof(data[0]); alloc:
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