From: Maciej Żenczykowski <maze@xxxxxxxxxx>
Fixes:
In file included from libip4tc.c:113:
In function ‘iptcc_compile_chain’,
inlined from ‘iptcc_compile_table’ at libiptc.c:1246:13,
inlined from ‘iptc_commit’ at libiptc.c:2575:8,
inlined from ‘iptc_commit’ at libiptc.c:2513:1:
libiptc.c:1172:2: warning: writing 16 bytes into a region of size 0 [-Wstringop-overflow=]
1172 | memcpy(&foot->e.counters, &c->counters, sizeof(STRUCT_COUNTERS));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../include/libiptc/libiptc.h:12,
from libip4tc.c:29:
libiptc.c: In function ‘iptc_commit’:
../include/linux/netfilter_ipv4/ip_tables.h:202:19: note: at offset 0 to object ‘entries’ with size 0 declared here
202 | struct ipt_entry entries[0];
| ^~~~~~~
Which was found via compilation on Fedora 32.
Test: builds without warnings
Signed-off-by: Maciej Żenczykowski <maze@xxxxxxxxxx>
---
libiptc/libiptc.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/libiptc/libiptc.c b/libiptc/libiptc.c
index 58882015..1a92b267 100644
--- a/libiptc/libiptc.c
+++ b/libiptc/libiptc.c
@@ -1169,7 +1169,10 @@ static int iptcc_compile_chain(struct xtc_handle *h, STRUCT_REPLACE *repl, struc
else
foot->target.verdict = RETURN;
/* set policy-counters */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wstringop-overflow"
memcpy(&foot->e.counters, &c->counters, sizeof(STRUCT_COUNTERS));
+#pragma GCC diagnostic pop
return 0;
}
--
2.26.2.645.ge9eca65c58-goog
