Date: Sun, 7 Jan 2018 13:39:12 +0000 (UTC) From: Kristof Provost <kp@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r327676 - head/sys/compat/linuxkpi/common/include/linux Message-ID: <201801071339.w07DdCaX070032@repo.freebsd.org>
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Author: kp Date: Sun Jan 7 13:39:12 2018 New Revision: 327676 URL: https://svnweb.freebsd.org/changeset/base/327676 Log: linuxkpi: Implement kcalloc() based on mallocarray() This means we now get integer overflow protection, which Linux code might expect as it is also provided by kcalloc() in Linux. Modified: head/sys/compat/linuxkpi/common/include/linux/slab.h Modified: head/sys/compat/linuxkpi/common/include/linux/slab.h ============================================================================== --- head/sys/compat/linuxkpi/common/include/linux/slab.h Sun Jan 7 13:35:15 2018 (r327675) +++ head/sys/compat/linuxkpi/common/include/linux/slab.h Sun Jan 7 13:39:12 2018 (r327676) @@ -46,7 +46,6 @@ MALLOC_DECLARE(M_KMALLOC); #define kzalloc(size, flags) kmalloc(size, (flags) | __GFP_ZERO) #define kzalloc_node(size, flags, node) kmalloc(size, (flags) | __GFP_ZERO) #define kfree_const(ptr) kfree(ptr) -#define kcalloc(n, size, flags) kmalloc((n) * (size), (flags) | __GFP_ZERO) #define vzalloc(size) __vmalloc(size, GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO, 0) #define vfree(arg) kfree(arg) #define kvfree(arg) kfree(arg) @@ -98,6 +97,13 @@ static inline void * kmalloc(size_t size, gfp_t flags) { return (malloc(size, M_KMALLOC, linux_check_m_flags(flags))); +} + +static inline void * +kcalloc(size_t n, size_t size, gfp_t flags) +{ + flags |= __GFP_ZERO; + return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags))); } static inline void *
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