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Date: Wed, 25 May 2022 08:15:54 +0800 From: Herbert Xu <herbert@...dor.apana.org.au> To: Stephen Hemminger <stephen@...workplumber.org> Cc: netdev@...r.kernel.org, Steffen Klassert <steffen.klassert@...unet.com>, "David S. Miller" <davem@...emloft.net>, open list <linux-kernel@...r.kernel.org> Subject: Re: [RFC] xfrm: convert alg_key to flexible array member On Tue, May 24, 2022 at 01:47:40PM -0700, Stephen Hemminger wrote: > Iproute2 build generates a warning when built with gcc-12. > This is because the alg_key in xfrm.h API has zero size > array element instead of flexible array. > > CC xfrm_state.o > In function ‘xfrm_algo_parse’, > inlined from ‘xfrm_state_modify.constprop’ at xfrm_state.c:573:5: > xfrm_state.c:162:32: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=] > 162 | buf[j] = val; > | ~~~~~~~^~~~~ > > This patch convert the alg_key into flexible array member. > There are other zero size arrays here that should be converted as > well. > > This patch is RFC only since it is only compile tested and > passes trivial iproute2 tests. > > Signed-off-by: Stephen Hemminger <stephen@...workplumber.org> > --- > include/uapi/linux/xfrm.h | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) Acked-by: Herbert Xu <herbert@...dor.apana.org.au> -- Email: Herbert Xu <herbert@...dor.apana.org.au> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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