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| author | Eric van Gyzen <vangyzen@FreeBSD.org> | 2022-02-17 15:53:48 +0000 |
|---|---|---|
| committer | Eric van Gyzen <vangyzen@FreeBSD.org> | 2022-02-17 16:09:53 +0000 |
| commit | 86e5e10daf54da7df358a06033f3a3bd8c852a08 (patch) | |
| tree | 5292f483a0aae42c7ab5eb2f3a5c53d538ae89ea | |
| parent | 95edb10b47fc1a919cd1687aaf16be9e14456c89 (diff) | |
| download | src-86e5e10daf54da7df358a06033f3a3bd8c852a08.tar.gz src-86e5e10daf54da7df358a06033f3a3bd8c852a08.zip | |
| -rw-r--r-- | usr.bin/elfdump/elfdump.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/usr.bin/elfdump/elfdump.c b/usr.bin/elfdump/elfdump.c index 2bdf98830088..28b42a55a508 100644 --- a/usr.bin/elfdump/elfdump.c +++ b/usr.bin/elfdump/elfdump.c @@ -585,6 +585,11 @@ main(int ac, char **av) if ((fd = open(*av, O_RDONLY)) < 0 || fstat(fd, &sb) < 0) err(1, "%s", *av); + if ((size_t)sb.st_size < sizeof(Elf32_Ehdr)) { + if (flags & ED_IS_ELF) + exit(1); + errx(1, "not an elf file"); + } cap_rights_init(&rights, CAP_MMAP_R); if (caph_rights_limit(fd, &rights) < 0) err(1, "unable to limit rights for %s", *av); @@ -598,7 +603,7 @@ main(int ac, char **av) e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0); if (e == MAP_FAILED) err(1, NULL); - if (!IS_ELF(*(Elf32_Ehdr *)e)) { + if (!IS_ELF(*e)) { if (flags & ED_IS_ELF) exit(1); errx(1, "not an elf file"); |