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Implement memdup_user_nul() in the LinuxKPI.

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MFC after:	1 week
Submitted by:	Johannes Lundberg <johalun0@gmail.com>
Sponsored by:	Mellanox Technologies
This commit is contained in:
Hans Petter Selasky 2018-02-16 15:52:28 +00:00
parent f1f7e04a29
commit 10ee3d3016
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=329377
1 changed files with 16 additions and 0 deletions
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16
sys/compat/linuxkpi/common/include/linux/string.h
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@ -70,6 +70,22 @@ memdup_user(const void *ptr, size_t len)
return (retval);
}
static inline void *
memdup_user_nul(const void *ptr, size_t len)
{
char *retval;
int error;
retval = malloc(len + 1, M_KMALLOC, M_WAITOK);
error = linux_copyin(ptr, retval, len);
if (error != 0) {
free(retval, M_KMALLOC);
return (ERR_PTR(error));
}
retval[len] = '\0';
return (retval);
}
static inline void *
kmemdup(const void *src, size_t len, gfp_t gfp)
{