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    Subject[PATCH 5.10 28/38] netfilter: nf_tables: initialize registers in nft_do_chain()
    Date
    From: Pablo Neira Ayuso <pablo@netfilter.org>

    commit 4c905f6740a365464e91467aa50916555b28213d upstream.

    Initialize registers to avoid stack leak into userspace.

    Fixes: 96518518cc41 ("netfilter: add nftables")
    Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    net/netfilter/nf_tables_core.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/net/netfilter/nf_tables_core.c
    +++ b/net/netfilter/nf_tables_core.c
    @@ -162,7 +162,7 @@ nft_do_chain(struct nft_pktinfo *pkt, vo
    struct nft_rule *const *rules;
    const struct nft_rule *rule;
    const struct nft_expr *expr, *last;
    - struct nft_regs regs;
    + struct nft_regs regs = {};
    unsigned int stackptr = 0;
    struct nft_jumpstack jumpstack[NFT_JUMP_STACK_SIZE];
    bool genbit = READ_ONCE(net->nft.gencursor);

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