diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/binfmt_flat.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c index c3ccdefdeac2..03301bad1f9b 100644 --- a/fs/binfmt_flat.c +++ b/fs/binfmt_flat.c @@ -466,6 +466,17 @@ static int load_flat_file(struct linux_binprm *bprm, } /* + * Make sure the header params are sane. + * 28 bits (256 MB) is way more than reasonable in this case. + * If some top bits are set we have probable binary corruption. + */ + if ((text_len | data_len | bss_len | stack_len | full_data) >> 28) { + pr_err("bad header\n"); + ret = -ENOEXEC; + goto err; + } + + /* * fix up the flags for the older format, there were all kinds * of endian hacks, this only works for the simple cases */ |