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un_asl_dynsym() should skip when !dynstr

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https://github.com/upx/upx/issues/785
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=66302
	modified:   p_lx_elf.cpp
This commit is contained in:
John Reiser 2024-02-08 19:32:03 -08:00 committed by Markus F.X.J. Oberhumer
parent 8f7578eef1
commit 25aa0e2e46
1 changed files with 2 additions and 2 deletions
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4
src/p_lx_elf.cpp
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@ -6334,7 +6334,7 @@ PackLinuxElf64::un_asl_dynsym( // ibuf has the input
// un-Relocate dynsym (DT_SYMTAB) which is below xct_off
dynstr = (char const *)elf_find_dynamic(Elf64_Dyn::DT_STRTAB);
sec_dynsym = elf_find_section_type(Elf64_Shdr::SHT_DYNSYM);
if (sec_dynsym) {
if (dynstr && sec_dynsym) {
upx_uint64_t const off_dynsym = get_te64(&sec_dynsym->sh_offset);
upx_uint64_t const sz_dynsym = get_te64(&sec_dynsym->sh_size);
if (orig_file_size < sz_dynsym
@ -6375,7 +6375,7 @@ PackLinuxElf32::un_asl_dynsym( // ibuf has the input
// un-Relocate dynsym (DT_SYMTAB) which is below xct_off
dynstr = (char const *)elf_find_dynamic(Elf32_Dyn::DT_STRTAB);
sec_dynsym = elf_find_section_type(Elf32_Shdr::SHT_DYNSYM);
if (sec_dynsym) {
if (dynstr && sec_dynsym) {
upx_uint32_t const off_dynsym = get_te32(&sec_dynsym->sh_offset);
upx_uint32_t const sz_dynsym = get_te32(&sec_dynsym->sh_size);
if (orig_file_size < sz_dynsym