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(parent: 3da1ed7) | patch
bpf: decrease usercnt if bpf_map_new_fd() fails in bpf_map_get_fd_by_id()
authorPeng Sun <sironhide0null@gmail.com>
Tue, 26 Feb 2019 14:15:37 +0000 (22:15 +0800)
committerDaniel Borkmann <daniel@iogearbox.net>
Tue, 26 Feb 2019 18:08:30 +0000 (19:08 +0100)
commit781e62823cb81b972dc8652c1827205cda2ac9ac
tree7f97f6e117edfd62175df6776a0c208c9325988dtree | snapshot
parent3da1ed7ac398f34fff1694017a07054d69c5f5c5commit | diff
bpf: decrease usercnt if bpf_map_new_fd() fails in bpf_map_get_fd_by_id()

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.

Fixes: bd5f5f4ecb78 ("bpf: Add BPF_MAP_GET_FD_BY_ID")
Signed-off-by: Peng Sun <sironhide0null@gmail.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
kernel/bpf/syscall.c diff | blob | history
ep93xx device tree rework repo: git://git.maquefel.me/linux.git