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Detect "no Shdrs" earlier when already packed

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https://github.com/upx/upx/issues/699
	modified:   p_lx_elf.cpp
This commit is contained in:
John Reiser 2023-08-23 07:52:29 -07:00 committed by Markus F.X.J. Oberhumer
parent 59c6a71b72
commit b526eed346
1 changed files with 4 additions and 1 deletions
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5
src/p_lx_elf.cpp
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@ -1046,12 +1046,15 @@ PackLinuxElf64::PackLinuxElf64help1(InputFile *f)
if (!(opt->cmd == CMD_COMPRESS && e_shoff < (upx_uint64_t)file_size && mb_shdr.getSize() == 0)) { if (!(opt->cmd == CMD_COMPRESS && e_shoff < (upx_uint64_t)file_size && mb_shdr.getSize() == 0)) {
shdri = nullptr; shdri = nullptr;
} }
else { else if (e_shnum && e_shoff && ehdri.e_shentsize) {
fi->seek(e_shoff, SEEK_SET); fi->seek(e_shoff, SEEK_SET);
mb_shdr.alloc( sizeof(Elf64_Shdr) * e_shnum); mb_shdr.alloc( sizeof(Elf64_Shdr) * e_shnum);
shdri = (Elf64_Shdr *)mb_shdr.getVoidPtr(); shdri = (Elf64_Shdr *)mb_shdr.getVoidPtr();
fi->readx(shdri, sizeof(Elf64_Shdr) * e_shnum); fi->readx(shdri, sizeof(Elf64_Shdr) * e_shnum);
} }
else {
shdri = nullptr;
}
sec_dynsym = elf_find_section_type(Elf64_Shdr::SHT_DYNSYM); sec_dynsym = elf_find_section_type(Elf64_Shdr::SHT_DYNSYM);
if (sec_dynsym) { if (sec_dynsym) {
unsigned t = get_te32(&sec_dynsym->sh_link); unsigned t = get_te32(&sec_dynsym->sh_link);