diff options
author | Gustavo A. R. Silva <gustavoars@kernel.org> | 2023-03-23 23:41:16 +0300 |
---|---|---|
committer | Gustavo A. R. Silva <gustavoars@kernel.org> | 2023-03-30 23:06:56 +0300 |
commit | 00168b415a60cec7558608efb4fc50f2a73daae2 (patch) | |
tree | b8bb7c160100f076c9e4f8edeffb6d343d40ef63 /include/uapi/linux/ipv6.h | |
parent | edfea16a6dae9c03bdc97babdd69960093263354 (diff) | |
download | linux-00168b415a60cec7558608efb4fc50f2a73daae2.tar.xz |
uapi: net: ipv6: Replace fake flex-array with flex-array member
Zero-length arrays as fake flexible arrays are deprecated and we are
moving towards adopting C99 flexible-array members instead.
Address the following warning found with GCC-13 and
-fstrict-flex-arrays=3 enabled:
net/ipv6/exthdrs.c: In function ‘fl6_update_dst’:
net/ipv6/exthdrs.c:1393:28: warning: array subscript 0 is outside array bounds of ‘struct in6_addr[0]’ [-Warray-bounds=]
1393 | fl6->daddr = *((struct rt0_hdr *)opt->srcrt)->addr;
| ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ./include/linux/ipv6.h:5,
from ./include/linux/icmpv6.h:6,
from net/ipv6/exthdrs.c:27:
./include/uapi/linux/ipv6.h:84:33: note: while referencing ‘addr’
84 | struct in6_addr addr[0];
| ^~~~
net/ipv6/exthdrs.c: In function ‘ipv6_push_rthdr0.isra’:
net/ipv6/exthdrs.c:1125:19: warning: array subscript <unknown> is outside array bounds of ‘struct in6_addr[0]’ [-Warray-bounds=]
1125 | phdr->addr[hops - 1] = **addr_p;
| ~~~~~~~~~~^~~~~~~~~~
./include/uapi/linux/ipv6.h:84:33: note: while referencing ‘addr’
84 | struct in6_addr addr[0];
| ^~~~
This helps with the ongoing efforts to tighten the FORTIFY_SOURCE
routines on memcpy() and help us make progress towards globally
enabling -fstrict-flex-arrays=3 [1].
Link: https://github.com/KSPP/linux/issues/21
Link: https://github.com/KSPP/linux/issues/276
Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [1]
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Diffstat (limited to 'include/uapi/linux/ipv6.h')
-rw-r--r-- | include/uapi/linux/ipv6.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/uapi/linux/ipv6.h b/include/uapi/linux/ipv6.h index 53326dfc59ec..ac56605fe9bc 100644 --- a/include/uapi/linux/ipv6.h +++ b/include/uapi/linux/ipv6.h @@ -81,7 +81,7 @@ struct ipv6_opt_hdr { struct rt0_hdr { struct ipv6_rt_hdr rt_hdr; __u32 reserved; - struct in6_addr addr[0]; + struct in6_addr addr[]; #define rt0_type rt_hdr.type }; |