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

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.

Phil Sutter committed 6 years ago

Commit 16416651 parent 0b9173f1 file · +3 −3Browse files

Showing the changes to include/uapi/linux (1 of 1 file). Show all

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@@ -41,19 +41,19 @@ struct xt_sctp_info { · 40 unmodified lines
41	41	#define SCTP_CHUNKMAP_SET(chunkmap, type) \
42	42	do { \
43	43	(chunkmap)[type / bytes(__u32)] \|= \
44		− 1 << (type % bytes(__u32)); \
	44	+ 1u << (type % bytes(__u32)); \
45	45	} while (0)
46	46
47	47	#define SCTP_CHUNKMAP_CLEAR(chunkmap, type) \
48	48	do { \
49	49	(chunkmap)[type / bytes(__u32)] &= \
50		− ~(1 << (type % bytes(__u32))); \
	50	+ ~(1u << (type % bytes(__u32))); \
51	51	} while (0)
52	52
53	53	#define SCTP_CHUNKMAP_IS_SET(chunkmap, type) \
54	54	({ \
55	55	((chunkmap)[type / bytes (__u32)] & \
56		− (1 << (type % bytes (__u32)))) ? 1: 0; \
	56	+ (1u << (type % bytes (__u32)))) ? 1: 0; \
57	57	})
58	58
59	59	#define SCTP_CHUNKMAP_RESET(chunkmap) \