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| author | Peng Sun <sironhide0null@gmail.com> | 2019-02-26 22:15:37 +0800 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2019-02-26 19:08:30 +0100 |
| commit | 781e62823cb81b972dc8652c1827205cda2ac9ac (patch) | |
| tree | 7f97f6e117edfd62175df6776a0c208c9325988d /kernel | |
| parent | 3da1ed7ac398f34fff1694017a07054d69c5f5c5 (diff) | |
| download | blackbird-obmc-linux-781e62823cb81b972dc8652c1827205cda2ac9ac.tar.gz blackbird-obmc-linux-781e62823cb81b972dc8652c1827205cda2ac9ac.zip | |
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>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/bpf/syscall.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 8577bb7f8be6..f98328abe8fa 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -1986,7 +1986,7 @@ static int bpf_map_get_fd_by_id(const union bpf_attr *attr) fd = bpf_map_new_fd(map, f_flags); if (fd < 0) - bpf_map_put(map); + bpf_map_put_with_uref(map); return fd; } |
