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Arnd Bergmann a308d6e686 netfilter: conntrack: avoid gcc-10 zero-length-bounds warning 
[ Upstream commit 2c407aca64 ]

gcc-10 warns around a suspicious access to an empty struct member:

net/netfilter/nf_conntrack_core.c: In function '__nf_conntrack_alloc':
net/netfilter/nf_conntrack_core.c:1522:9: warning: array subscript 0 is outside the bounds of an interior zero-length array 'u8[0]' {aka 'unsigned char[0]'} [-Wzero-length-bounds]
 1522 |  memset(&ct->__nfct_init_offset[0], 0,
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from net/netfilter/nf_conntrack_core.c:37:
include/net/netfilter/nf_conntrack.h:90:5: note: while referencing '__nfct_init_offset'
   90 |  u8 __nfct_init_offset[0];
      |     ^~~~~~~~~~~~~~~~~~

The code is correct but a bit unusual. Rework it slightly in a way that
does not trigger the warning, using an empty struct instead of an empty
array. There are probably more elegant ways to do this, but this is the
smallest change.

Fixes: c41884ce05 ("netfilter: conntrack: avoid zeroing timer")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2020-05-20 08:20:23 +02:00
..
ipv4 netfilter: add missing includes to a number of header-files. 2019-08-13 12:14:39 +02:00
ipv6 netfilter: remove nf_conntrack_icmpv6.h header. 2019-09-13 12:33:06 +02:00
br_netfilter.h netfilter: remove CONFIG_NETFILTER checks from headers. 2019-09-13 12:47:36 +02:00
nf_conntrack.h netfilter: conntrack: avoid gcc-10 zero-length-bounds warning 2020-05-20 08:20:23 +02:00
nf_conntrack_acct.h netfilter: conntrack: remove CONFIG_NF_CONNTRACK check from nf_conntrack_acct.h. 2019-09-13 12:47:18 +02:00
nf_conntrack_bridge.h netfilter: remove CONFIG_NETFILTER checks from headers. 2019-09-13 12:47:36 +02:00
nf_conntrack_core.h netfilter: remove CONFIG_NETFILTER checks from headers. 2019-09-13 12:47:36 +02:00
nf_conntrack_count.h netfilter: add missing includes to a number of header-files. 2019-08-13 12:14:39 +02:00
nf_conntrack_ecache.h netfilter: conntrack: use consistent style when defining inline functions 2019-09-13 12:46:25 +02:00
nf_conntrack_expect.h netfilter: fix coding-style errors. 2019-09-13 11:39:38 +02:00
nf_conntrack_extend.h netfilter: replace defined(CONFIG...) || defined(CONFIG...MODULE) with IS_ENABLED(CONFIG...). 2019-09-13 12:47:09 +02:00
nf_conntrack_helper.h netfilter: add API to manage NAT helpers. 2019-04-30 14:19:55 +02:00
nf_conntrack_l4proto.h netfilter: remove CONFIG_NETFILTER checks from headers. 2019-09-13 12:47:36 +02:00
nf_conntrack_labels.h netfilter: fix include guards. 2019-09-13 11:39:38 +02:00
nf_conntrack_seqadj.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
nf_conntrack_synproxy.h netfilter: conntrack: wrap two inline functions in config checks. 2019-09-13 12:47:10 +02:00
nf_conntrack_timeout.h netfilter: conntrack: wrap two inline functions in config checks. 2019-09-13 12:47:10 +02:00
nf_conntrack_timestamp.h netfilter: conntrack: remove two unused functions from nf_conntrack_timestamp.h. 2019-09-13 12:48:09 +02:00
nf_conntrack_tuple.h netfilter: remove CONFIG_NETFILTER checks from headers. 2019-09-13 12:47:36 +02:00
nf_conntrack_zones.h netfilter: conntrack: remove CONFIG_NF_CONNTRACK checks from nf_conntrack_zones.h. 2019-09-13 12:47:41 +02:00
nf_dup_netdev.h netfilter: nft_{fwd,dup}_netdev: add offload support 2019-09-10 22:44:29 +02:00
nf_flow_table.h netfilter: remove CONFIG_NETFILTER checks from headers. 2019-09-13 12:47:36 +02:00
nf_log.h netfilter: check if the socket netns is correct. 2018-06-28 22:21:32 +09:00
nf_nat.h netfilter: remove CONFIG_NETFILTER checks from headers. 2019-09-13 12:47:36 +02:00
nf_nat_helper.h netfilter: add missing includes to a number of header-files. 2019-08-13 12:14:39 +02:00
nf_nat_masquerade.h netfilter: update include directives. 2019-09-13 12:33:06 +02:00
nf_nat_redirect.h netfilter: add missing includes to a number of header-files. 2019-08-13 12:14:39 +02:00
nf_queue.h netfilter: remove CONFIG_NETFILTER checks from headers. 2019-09-13 12:47:36 +02:00
nf_reject.h netfilter: add missing includes to a number of header-files. 2019-08-13 12:14:39 +02:00
nf_socket.h netfilter: Decrease code duplication regarding transparent socket option 2018-06-03 00:02:01 +02:00
nf_synproxy.h netfilter: remove CONFIG_NETFILTER checks from headers. 2019-09-13 12:47:36 +02:00
nf_tables.h netfilter: nf_tables: Align nft_expr private data to 64-bit 2019-11-04 20:58:32 +01:00
nf_tables_core.h netfilter: nf_tables: add direct calls for all builtin expressions 2019-01-18 15:02:33 +01:00
nf_tables_ipv4.h netfilter: nf_tables_inet: don't use multihook infrastructure anymore 2018-01-08 18:01:20 +01:00
nf_tables_ipv6.h netfilter: add missing includes to a number of header-files. 2019-08-13 12:14:39 +02:00
nf_tables_offload.h netfilter: nf_tables_offload: remove rules when the device unregisters 2019-09-13 10:58:10 +02:00
nf_tproxy.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2018-07-20 22:28:28 -07:00
nft_fib.h netfilter: add missing includes to a number of header-files. 2019-08-13 12:14:39 +02:00
nft_meta.h netfilter: add missing includes to a number of header-files. 2019-08-13 12:14:39 +02:00
nft_reject.h netfilter: add missing includes to a number of header-files. 2019-08-13 12:14:39 +02:00
xt_rateest.h netfilter: make xt_rateest hash table per net 2018-03-05 23:15:44 +01:00