diff options
| -rw-r--r-- | archival/unzip.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/archival/unzip.c b/archival/unzip.c index d5bca08d4..b618c3617 100644 --- a/archival/unzip.c +++ b/archival/unzip.c @@ -318,6 +318,12 @@ static uint32_t read_next_cdf(uint32_t cdf_offset, cdf_header_t *cdf) }; #endif +static void die_if_bad_fnamesize(unsigned sz) +{ + if (sz > 0xfff) /* more than 4k?! no funny business please */ + bb_error_msg_and_die("bad archive"); +} + static void unzip_skip(off_t skip) { if (skip != 0) @@ -340,8 +346,7 @@ static void unzip_extract_symlink(zip_header_t *zip, const char *dst_fn) { char *target; - if (zip->fmt.ucmpsize > 0xfff) /* no funny business please */ - bb_error_msg_and_die("bad archive"); + die_if_bad_fnamesize(zip->fmt.ucmpsize); if (zip->fmt.method == 0) { /* Method 0 - stored (not compressed) */ @@ -784,6 +789,7 @@ int unzip_main(int argc, char **argv) /* Read filename */ free(dst_fn); + die_if_bad_fnamesize(zip.fmt.filename_len); dst_fn = xzalloc(zip.fmt.filename_len + 1); xread(zip_fd, dst_fn, zip.fmt.filename_len); /* Skip extra header bytes */ |