From 60ef0494f197d4705b17132ee7d496283b5604b3 Mon Sep 17 00:00:00 2001 From: Daniel Borkmann Date: Thu, 11 Sep 2014 10:36:48 +0100 Subject: net: bpf: arm64: fix module memory leak when JIT image build fails On ARM64, when the BPF JIT compiler fills the JIT image body with opcodes during translation of eBPF into ARM64 opcodes, we may fail for several reasons during that phase: one being that we jump to the notyet label for not yet supported eBPF instructions such as BPF_ST. In that case we only free offsets, but not the actual allocated target image where opcodes are being stored. Fix it by calling module_free() on dismantle time in case of errors. Signed-off-by: Daniel Borkmann Acked-by: Zi Shen Lim Acked-by: Will Deacon Cc: Alexei Starovoitov Signed-off-by: Catalin Marinas --- arch/arm64/net/bpf_jit_comp.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'arch/arm64/net') diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c index 38c42965382d..7ae33545535b 100644 --- a/arch/arm64/net/bpf_jit_comp.c +++ b/arch/arm64/net/bpf_jit_comp.c @@ -651,8 +651,10 @@ void bpf_int_jit_compile(struct bpf_prog *prog) build_prologue(&ctx); ctx.body_offset = ctx.idx; - if (build_body(&ctx)) + if (build_body(&ctx)) { + module_free(NULL, ctx.image); goto out; + } build_epilogue(&ctx); -- cgit v1.2.3