summaryrefslogtreecommitdiff
path: root/tools/docs/lib/enrich_formatter.py
diff options
context:
space:
mode:
authorFernando Fernandez Mancera <fmancera@suse.de>2025-10-08 12:08:16 +0200
committerFlorian Westphal <fw@strlen.de>2025-10-08 13:17:25 +0200
commitf359b809d54c6e3dd1d039b97e0b68390b0e53e4 (patch)
tree7ad956f4be956378c753fe70f9bc6dffb6b71f70 /tools/docs/lib/enrich_formatter.py
parent2c95a756e0cfc19af6d0b32b0c6cf3bada334998 (diff)
netfilter: nft_objref: validate objref and objrefmap expressions
Referencing a synproxy stateful object from OUTPUT hook causes kernel crash due to infinite recursive calls: BUG: TASK stack guard page was hit at 000000008bda5b8c (stack is 000000003ab1c4a5..00000000494d8b12) [...] Call Trace: __find_rr_leaf+0x99/0x230 fib6_table_lookup+0x13b/0x2d0 ip6_pol_route+0xa4/0x400 fib6_rule_lookup+0x156/0x240 ip6_route_output_flags+0xc6/0x150 __nf_ip6_route+0x23/0x50 synproxy_send_tcp_ipv6+0x106/0x200 synproxy_send_client_synack_ipv6+0x1aa/0x1f0 nft_synproxy_do_eval+0x263/0x310 nft_do_chain+0x5a8/0x5f0 [nf_tables nft_do_chain_inet+0x98/0x110 nf_hook_slow+0x43/0xc0 __ip6_local_out+0xf0/0x170 ip6_local_out+0x17/0x70 synproxy_send_tcp_ipv6+0x1a2/0x200 synproxy_send_client_synack_ipv6+0x1aa/0x1f0 [...] Implement objref and objrefmap expression validate functions. Currently, only NFT_OBJECT_SYNPROXY object type requires validation. This will also handle a jump to a chain using a synproxy object from the OUTPUT hook. Now when trying to reference a synproxy object in the OUTPUT hook, nft will produce the following error: synproxy_crash.nft: Error: Could not process rule: Operation not supported synproxy name mysynproxy ^^^^^^^^^^^^^^^^^^^^^^^^ Fixes: ee394f96ad75 ("netfilter: nft_synproxy: add synproxy stateful object support") Reported-by: Georg Pfuetzenreuter <georg.pfuetzenreuter@suse.com> Closes: https://bugzilla.suse.com/1250237 Signed-off-by: Fernando Fernandez Mancera <fmancera@suse.de> Reviewed-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Florian Westphal <fw@strlen.de>
Diffstat (limited to 'tools/docs/lib/enrich_formatter.py')
0 files changed, 0 insertions, 0 deletions