Let clang warning shut up and initialize the allocated area
with zeroes.
CC net/bpf.o
net/bpf.c:297:16: warning: The left expression of the compound assignment
is an uninitialized value. The computed value will also be garbage
curr[1].code |= (uint16_t) rand();
~~~~~~~~~~~~ ^
net/bpf.c:299:16: warning: The left expression of the compound assignment
is an uninitialized value. The computed value will also be garbage
curr[2].code |= (uint16_t) rand();
~~~~~~~~~~~~ ^
Reported-by: Dave Jones <davej@xxxxxxxxxx>
Signed-off-by: Daniel Borkmann <dborkman@xxxxxxxxxx>
---
net/bpf.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/net/bpf.c b/net/bpf.c
index cc748de..bda72e1 100644
--- a/net/bpf.c
+++ b/net/bpf.c
@@ -338,11 +338,15 @@ void gen_seccomp_bpf(unsigned long *addr, unsigned long *addrlen)
return;
}
+ memset(bpf->filter, 0, bpf->len * sizeof(struct sock_filter));
+
seccomp_state = seccomp_choose(seccomp_markov_init);
+
for (curr = bpf->filter; avail > 3; ) {
used = gen_seccomp_bpf_code(curr);
curr += used;
avail -= used;
+
seccomp_state = seccomp_choose(seccomp_markov[seccomp_state]);
}
--
1.7.11.7
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