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Date: Fri, 05 Jan 2018 00:21:42 +0000 From: bugzilla-dae...@bugzilla.kernel.org To: step...@networkplumber.org Subject: [Bug 198353] New: Generic netlink family bug when multicast groups are greater than 13 https://bugzilla.kernel.org/show_bug.cgi?id=198353 Bug ID: 198353 Summary: Generic netlink family bug when multicast groups are greater than 13 Product: Networking Version: 2.5 Kernel Version: 4.4 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: blocking Priority: P1 Component: Other Assignee: step...@networkplumber.org Reporter: jaipal.katk...@itron.com Regression: No Created attachment 273405 --> https://bugzilla.kernel.org/attachment.cgi?id=273405&action=edit 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. -- You are receiving this mail because: You are the assignee for the bug.
