| commit | 6183f4d3a0a2ad230511987c6c362ca43ec0055f | [log] [tgz] |
|---|---|---|
| author | Bui Quang Minh <minhquangbui99@gmail.com> | Wed Jan 27 06:36:53 2021 +0000 |
| committer | Daniel Borkmann <daniel@iogearbox.net> | Wed Feb 03 21:45:33 2021 +0100 |
| tree | d30766fb02fcac1ed22476c75727435978cdee76 | |
| parent | 548f1191d86ccb9bde2a5305988877b7584c01eb [diff] |
bpf: Check for integer overflow when using roundup_pow_of_two()
On 32-bit architecture, roundup_pow_of_two() can return 0 when the argument
has upper most bit set due to resulting 1UL << 32. Add a check for this case.
Fixes: d5a3b1f69186 ("bpf: introduce BPF_MAP_TYPE_STACK_TRACE")
Signed-off-by: Bui Quang Minh <minhquangbui99@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20210127063653.3576-1-minhquangbui99@gmail.com