• D
    net: filter: seccomp: fix wrong decoding of BPF_S_ANC_SECCOMP_LD_W · 8c482cdc
    Daniel Borkmann 提交于
    While reviewing seccomp code, we found that BPF_S_ANC_SECCOMP_LD_W has
    been wrongly decoded by commit a8fc9277 ("sk-filter: Add ability to
    get socket filter program (v2)") into the opcode BPF_LD|BPF_B|BPF_ABS
    although it should have been decoded as BPF_LD|BPF_W|BPF_ABS.
    
    In practice, this should not have much side-effect though, as such
    conversion is/was being done through prctl(2) PR_SET_SECCOMP. Reverse
    operation PR_GET_SECCOMP will only return the current seccomp mode, but
    not the filter itself. Since the transition to the new BPF infrastructure,
    it's also not used anymore, so we can simply remove this as it's
    unreachable.
    
    Fixes: a8fc9277 ("sk-filter: Add ability to get socket filter program (v2)")
    Signed-off-by: NDaniel Borkmann <dborkman@redhat.com>
    Signed-off-by: NAlexei Starovoitov <ast@plumgrid.com>
    Cc: Pavel Emelyanov <xemul@parallels.com>
    Signed-off-by: NDavid S. Miller <davem@davemloft.net>
    8c482cdc
filter.h 5.5 KB