Bug 198353
| Summary: | Generic netlink family bug when multicast groups are greater than 13 | ||
|---|---|---|---|
| Product: | Networking | Reporter: | jaipal.katkuri |
| Component: | Other | Assignee: | Stephen Hemminger (stephen) |
| Status: | NEW --- | ||
| Severity: | blocking | ||
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 4.4 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
| Attachments: | linux-4.4-netlink-genlmcgroup.patch | ||
Created attachment 273405 [details] linux-4.4-netlink-genlmcgroup.patch Kernel Version: 4.4 File: netlink/genetlink.c While reserving multicast groups for a netlink family in the kernel, if the request has more than 13 groups the code allocates only 13 groups and returns success. In the function "genl_allocate_reserve_groups" the variable "id" is returned with the first available multicast group slot but it doesn't check if the request "n_groups" is more than 13. Attached patch fixes the problem.