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Date: Tue, 26 Feb 2019 17:33:58 +0000 From: Martin Lau <kafai@...com> To: zerons <sironhide0null@...il.com> CC: "ast@...nel.org" <ast@...nel.org>, "daniel@...earbox.net" <daniel@...earbox.net>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: [PATCH] bpf: decrease usercnt if bpf_map_new_fd() fails in bpf_map_get_fd_by_id() On Tue, Feb 26, 2019 at 10:15:37PM +0800, zerons wrote: > [ Upstream commit c91951f15978f1a0c6b65f063d30f7ea7bc6fb42 ] > > In bpf/syscall.c, bpf_map_get_fd_by_id() use bpf_map_inc_not_zero() to increase > the refcount, both map->refcnt and map->usercnt. Then, if bpf_map_new_fd() fails, > should handle map->usercnt too. Good catch! Thanks for the fix. Fixes: bd5f5f4ecb78 ("bpf: Add BPF_MAP_GET_FD_BY_ID") Acked-by: Martin KaFai Lau <kafai@...com>
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