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netfilter: uapi: Avoid undefined left-shift in xt_sctp.h

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[ Upstream commit 164166558a ]

With 'bytes(__u32)' being 32, a left-shift of 31 may happen which is
undefined for the signed 32-bit value 1. Avoid this by declaring 1 as
unsigned.

Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Phil Sutter 2019-12-05 13:35:11 +01:00 committed by Greg Kroah-Hartman
parent 324172d2ad
commit 17a7f9d865
1 changed files with 3 additions and 3 deletions
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6
include/uapi/linux/netfilter/xt_sctp.h
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@ -41,19 +41,19 @@ struct xt_sctp_info {
#define SCTP_CHUNKMAP_SET(chunkmap, type) \
do { \
(chunkmap)[type / bytes(__u32)] |= \
1 << (type % bytes(__u32)); \
1u << (type % bytes(__u32)); \
} while (0)
#define SCTP_CHUNKMAP_CLEAR(chunkmap, type) \
do { \
(chunkmap)[type / bytes(__u32)] &= \
~(1 << (type % bytes(__u32))); \
~(1u << (type % bytes(__u32))); \
} while (0)
#define SCTP_CHUNKMAP_IS_SET(chunkmap, type) \
({ \
((chunkmap)[type / bytes (__u32)] & \
(1 << (type % bytes (__u32)))) ? 1: 0; \
(1u << (type % bytes (__u32)))) ? 1: 0; \
})
#define SCTP_CHUNKMAP_RESET(chunkmap) \