On Wed, Dec 15, 2021 at 02:01:39AM +0000, Connor O'Brien wrote:
From: Bui Quang Minh minhquangbui99@gmail.com
commit 7dd5d437c258bbf4cc15b35229e5208b87b8b4e0 upstream.
In 32-bit architecture, the result of sizeof() is a 32-bit integer so the expression becomes the multiplication between 2 32-bit integer which can potentially leads to integer overflow. As a result, bpf_map_area_alloc() allocates less memory than needed.
Fix this by casting 1 operand to u64.
Fixes: 0d2c4f964050 ("bpf: Eliminate rlimit-based memory accounting for sockmap and sockhash maps") Fixes: 99c51064fb06 ("devmap: Use bpf_map_area_alloc() for allocating hash buckets") Fixes: 546ac1ffb70d ("bpf: add devmap, a map for storing net device references") Signed-off-by: Bui Quang Minh minhquangbui99@gmail.com Signed-off-by: Alexei Starovoitov ast@kernel.org Link: https://lore.kernel.org/bpf/20210613143440.71975-1-minhquangbui99@gmail.com Signed-off-by: Connor O'Brien connoro@google.com
Hello,
This is for the 5.4 and 5.10 kernels.
Now queued up, thanks.
greg k-h