Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.19 14/20] netfilter: nf_tables: initialize registers in nft_do_chain() | Date | Fri, 25 Mar 2022 16:04:52 +0100 |
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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 @@ -144,7 +144,7 @@ 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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