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| author | H.J. Lu <hjl.tools@gmail.com> | 2022-12-06 12:54:43 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2022-12-06 14:47:44 -0800 |
| commit | e25466730d436937e814f80b69e5d124513fff03 (patch) | |
| tree | 2f1e54e0ea43df62e47d9f003900d604d88d38d1 /bfd/compress.c | |
| parent | 53fd08b60d8183af2a6a6820677bfd01716bc992 (diff) | |
| download | gdb-e25466730d436937e814f80b69e5d124513fff03.zip gdb-e25466730d436937e814f80b69e5d124513fff03.tar.gz gdb-e25466730d436937e814f80b69e5d124513fff03.tar.bz2 | |
bfd: Avoid signed overflow for new_size adjustment
When bfd_size_type is unsigned 64-bit integer and sizeof is unsigned
32-bit integer, subtraction in
*new_size += sizeof (Elf32_External_Chdr) - sizeof (Elf64_External_Chdr);
will overflow. Use
*new_size -= sizeof (Elf64_External_Chdr) - sizeof (Elf32_External_Chdr);
to avoid overflow.
PR binutils/29860
* compress.c (bfd_convert_section_setup): Avoid signed overflow
for new_size adjustment.
Diffstat (limited to 'bfd/compress.c')
| -rw-r--r-- | bfd/compress.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/bfd/compress.c b/bfd/compress.c index bb55a6e..5ea7cd9 100644 --- a/bfd/compress.c +++ b/bfd/compress.c @@ -306,7 +306,7 @@ bfd_convert_section_setup (bfd *ibfd, asection *isec, bfd *obfd, if (hdr_size == sizeof (Elf32_External_Chdr)) *new_size += sizeof (Elf64_External_Chdr) - sizeof (Elf32_External_Chdr); else - *new_size += sizeof (Elf32_External_Chdr) - sizeof (Elf64_External_Chdr); + *new_size -= sizeof (Elf64_External_Chdr) - sizeof (Elf32_External_Chdr); return true; } |