diff options
| author | Daniel Borkmann <daniel@iogearbox.net> | 2018-11-02 11:35:46 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-27 16:13:03 +0100 |
| commit | 1a7ccf42cb03cd9976134eea111cfc5168a0ea31 (patch) | |
| tree | 5b505cb086d2fc384963dcf52483127930e9564a /kernel/bpf/syscall.c | |
| parent | 5e4ad7cec8f81ce022d51e6e2d4059d45cc3ac12 (diff) | |
bpf: fix bpf_prog_get_info_by_fd to return 0 func_lens for unpriv
[ Upstream commit 28c2fae726bf5003cd209b0d5910a642af98316f ]
While dbecd7388476 ("bpf: get kernel symbol addresses via syscall")
zeroed info.nr_jited_ksyms in bpf_prog_get_info_by_fd() for queries
from unprivileged users, commit 815581c11cc2 ("bpf: get JITed image
lengths of functions via syscall") forgot about doing so and therefore
returns the #elems of the user set up buffer which is incorrect. It
also needs to indicate a info.nr_jited_func_lens of zero.
Fixes: 815581c11cc2 ("bpf: get JITed image lengths of functions via syscall")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Cc: Sandipan Das <sandipan@linux.vnet.ibm.com>
Cc: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'kernel/bpf/syscall.c')
| -rw-r--r-- | kernel/bpf/syscall.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 675eb6d36e47..382c09dddf93 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -1974,6 +1974,7 @@ static int bpf_prog_get_info_by_fd(struct bpf_prog *prog, info.jited_prog_len = 0; info.xlated_prog_len = 0; info.nr_jited_ksyms = 0; + info.nr_jited_func_lens = 0; goto done; } |