diff options
| author | Andrii Nakryiko <andriin@fb.com> | 2020-09-03 21:16:11 -0700 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2020-09-04 14:35:12 +0200 |
| commit | 8eb629585d2231e90112148009e2a11b0979ca38 (patch) | |
| tree | 94ba49d2e25651fd880da37ce6e3252c3bd294fa | |
| parent | 17e54b096e6a8dc92b92c59c2e3437550383b27a (diff) | |
| download | linux-8eb629585d2231e90112148009e2a11b0979ca38.tar.bz2 | |
libbpf: Fix potential multiplication overflow
Detected by LGTM static analyze in Github repo, fix potential multiplication
overflow before result is casted to size_t.
Fixes: 8505e8709b5e ("libbpf: Implement generalized .BTF.ext func/line info adjustment")
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20200904041611.1695163-2-andriin@fb.com
| -rw-r--r-- | tools/lib/bpf/libbpf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 53be32a2b9fc..550950eb1860 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -5802,7 +5802,7 @@ static int adjust_prog_btf_ext_info(const struct bpf_object *obj, /* append func/line info of a given (sub-)program to the main * program func/line info */ - old_sz = (*prog_rec_cnt) * ext_info->rec_size; + old_sz = (size_t)(*prog_rec_cnt) * ext_info->rec_size; new_sz = old_sz + (copy_end - copy_start); new_prog_info = realloc(*prog_info, new_sz); if (!new_prog_info) |