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| author | Alexei Starovoitov <ast@plumgrid.com> | 2014-04-22 23:18:57 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-04-23 15:34:41 -0400 |
| commit | 83d5b7ef99c9f05e87333b334a638de1264ab8e4 (patch) | |
| tree | f95ec9cdb441ecfcd32cafe96c1d30a865c9ba35 /net/core/utils.c | |
| parent | c06cbcb6052edd8f4ee00d65f874b26404ac8f96 (diff) | |
net: filter: initialize A and X registers
exisiting BPF verifier allows uninitialized access to registers,
'ret A' is considered to be a valid filter.
So initialize A and X to zero to prevent leaking kernel memory
In the future BPF verifier will be rejecting such filters
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Cc: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/utils.c')
0 files changed, 0 insertions, 0 deletions