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LibELF: Don't validate PT_LOAD alignment in ET_CORE files

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This was causing CrashDaemon to choke on our coredumps. Note that we
didn't care about the validation failures before this change either,
this patch simply reorders the checks to avoid divide-by-zero when
validating an ET_CORE file.
This commit is contained in:
Andreas Kling
2021-06-29 10:43:58 +02:00
parent c37ad5a1d3
commit 114e8fffcd
1 changed files with 4 additions and 4 deletions
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8
Userland/Libraries/LibELF/Validation.cpp
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@@ -236,16 +236,16 @@ bool validate_program_headers(const ElfW(Ehdr) & elf_header, size_t file_size, c
return false;
}
if (program_header.p_type == PT_LOAD && program_header.p_align % (size_t)PAGE_SIZE != 0) {
if (elf_header.e_type != ET_CORE) {
if (elf_header.e_type != ET_CORE) {
if (program_header.p_type == PT_LOAD && program_header.p_align % (size_t)PAGE_SIZE != 0) {
if (verbose)
dbgln("Program header ({}) with p_type PT_LOAD has p_align ({}) not divisible by page size ({})", header_index, program_header.p_align, PAGE_SIZE);
return false;
}
}
if (program_header.p_type == PT_LOAD && program_header.p_vaddr % program_header.p_align != program_header.p_offset % program_header.p_align) {
if (elf_header.e_type != ET_CORE) {
if (elf_header.e_type != ET_CORE) {
if (program_header.p_type == PT_LOAD && program_header.p_vaddr % program_header.p_align != program_header.p_offset % program_header.p_align) {
if (verbose)
dbgln("Program header ({}) with p_type PT_LOAD has mis-aligned p_vaddr ({:x})", header_index, program_header.p_vaddr);
return false;