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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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2fac6f3fec
Patch from Deepak Saxena The current memset() and memzero() macros on ARM reference the incoming parameters more than once and this can cause uninted side-effects. The issue was found while debugging SCTP protocol and with the specific usage of memzero(skb_put(skb,size),size). This call would call skb_put(skb,size) twice leading to badness. The fixed version copies the incoming parameters into local variables and uses those instead. Signed-off-by: Deepak Saxena Signed-off-by: Russell King
50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
#ifndef __ASM_ARM_STRING_H
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#define __ASM_ARM_STRING_H
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/*
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* We don't do inline string functions, since the
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* optimised inline asm versions are not small.
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*/
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#define __HAVE_ARCH_STRRCHR
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extern char * strrchr(const char * s, int c);
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#define __HAVE_ARCH_STRCHR
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extern char * strchr(const char * s, int c);
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#define __HAVE_ARCH_MEMCPY
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extern void * memcpy(void *, const void *, __kernel_size_t);
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#define __HAVE_ARCH_MEMMOVE
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extern void * memmove(void *, const void *, __kernel_size_t);
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#define __HAVE_ARCH_MEMCHR
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extern void * memchr(const void *, int, __kernel_size_t);
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#define __HAVE_ARCH_MEMZERO
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#define __HAVE_ARCH_MEMSET
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extern void * memset(void *, int, __kernel_size_t);
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extern void __memzero(void *ptr, __kernel_size_t n);
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#define memset(p,v,n) \
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({ \
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void *__p = (p); size_t __n = n; \
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if ((__n) != 0) { \
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if (__builtin_constant_p((v)) && (v) == 0) \
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__memzero((__p),(__n)); \
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else \
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memset((__p),(v),(__n)); \
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} \
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(__p); \
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})
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#define memzero(p,n) \
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({ \
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void *__p = (p); size_t __n = n; \
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if ((__n) != 0) \
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__memzero((__p),(__n)); \
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(__p); \
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})
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#endif
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