xfrm6_tunnel: Fix spi check in __xfrm6_tunnel_alloc_spi

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[ Upstream commit fa89a4593b ]

gcc warn this:

net/ipv6/xfrm6_tunnel.c:143 __xfrm6_tunnel_alloc_spi() warn:
 always true condition '(spi <= 4294967295) => (0-u32max <= u32max)'

'spi' is u32, which always not greater than XFRM6_TUNNEL_SPI_MAX
because of wrap around. So the second forloop will never reach.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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YueHaibing 2018-12-19 14:45:09 +08:00 • committed by Greg Kroah-Hartman

parent 6098aab900

commit 26eee9088b

1 changed files with 3 additions and 0 deletions

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net/ipv6/xfrm6_tunnel.c

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