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| author | Daniel Borkmann <daniel@iogearbox.net> | 2018-06-28 23:34:58 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2018-06-29 10:47:35 -0700 |
| commit | f605ce5eb26ac934fb8106d75d46a2c875a2bf23 (patch) | |
| tree | 97ee4598527128b1a2f4e4f0795ddbb4f62499d2 /arch/s390/net | |
| parent | 18d405af30bf6506bf2fc49056de7691c949812e (diff) | |
| download | linux-stable-f605ce5eb26ac934fb8106d75d46a2c875a2bf23.tar.gz linux-stable-f605ce5eb26ac934fb8106d75d46a2c875a2bf23.tar.bz2 linux-stable-f605ce5eb26ac934fb8106d75d46a2c875a2bf23.zip | |
bpf, s390: fix potential memleak when later bpf_jit_prog fails
If we would ever fail in the bpf_jit_prog() pass that writes the
actual insns to the image after we got header via bpf_jit_binary_alloc()
then we also need to make sure to free it through bpf_jit_binary_free()
again when bailing out. Given we had prior bpf_jit_prog() passes to
initially probe for clobbered registers, program size and to fill in
addrs arrray for jump targets, this is more of a theoretical one,
but at least make sure this doesn't break with future changes.
Fixes: 054623105728 ("s390/bpf: Add s390x eBPF JIT compiler backend")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'arch/s390/net')
| -rw-r--r-- | arch/s390/net/bpf_jit_comp.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/net/bpf_jit_comp.c b/arch/s390/net/bpf_jit_comp.c index d2db8acb1a55..5f0234ec8038 100644 --- a/arch/s390/net/bpf_jit_comp.c +++ b/arch/s390/net/bpf_jit_comp.c @@ -1286,6 +1286,7 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *fp) goto free_addrs; } if (bpf_jit_prog(&jit, fp)) { + bpf_jit_binary_free(header); fp = orig_fp; goto free_addrs; } |