diff options
| author | Mark Wielaard <[email protected]> | 2025-02-09 00:07:13 +0100 |
|---|---|---|
| committer | Mark Wielaard <[email protected]> | 2025-02-14 08:55:10 +0100 |
| commit | b38e562a4c907e08171c76b8b2def8464d5a104a (patch) | |
| tree | eb3ae5da27b99930b80e234e9583ccd6f85a8047 | |
| parent | 5e5c0394d82c53e97750fe7b18023e6f84157b81 (diff) | |
readelf: Handle NULL phdr in handle_dynamic_symtab
A corrupt ELF file can have broken program headers, in which case
gelf_getphdr returns NULL. This could crash handle_dynamic_symtab
while searching for the PT_DYNAMIC phdr. Fix this by checking whether
gelf_phdr returns NULL.
* src/readelf.c (handle_dynamic_symtab): Check whether
gelf_getphdr returns NULL.
https://sourceware.org/bugzilla/show_bug.cgi?id=32655
Signed-off-by: Mark Wielaard <[email protected]>
| -rw-r--r-- | src/readelf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/readelf.c b/src/readelf.c index c43fda35..21b92a08 100644 --- a/src/readelf.c +++ b/src/readelf.c @@ -2912,7 +2912,7 @@ handle_dynamic_symtab (Ebl *ebl) for (size_t i = 0; i < phnum; ++i) { phdr = gelf_getphdr (ebl->elf, i, &phdr_mem); - if (phdr->p_type == PT_DYNAMIC) + if (phdr == NULL || phdr->p_type == PT_DYNAMIC) break; } if (phdr == NULL) |