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super0: Use memmove() when adjusting sparc2.2 superblock data 

memcpy() does not allow overlapping copies, switch to memmove()

Signed-off-by: Jes Sorensen <jsorensen@fb.com>
This commit is contained in:
Jes Sorensen 2018-05-31 13:17:46 -04:00
parent c1b78589cf
commit 2dcd649271
1 changed files with 4 additions and 3 deletions
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7
super0.c
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@ -520,9 +520,10 @@ static int update_super0(struct supertype *st, struct mdinfo *info,
* up 4 bytes before continuing
*/
__u32 *sb32 = (__u32*)sb;
memcpy(sb32+MD_SB_GENERIC_CONSTANT_WORDS+7,
sb32+MD_SB_GENERIC_CONSTANT_WORDS+7+1,
(MD_SB_WORDS - (MD_SB_GENERIC_CONSTANT_WORDS+7+1))*4);
memmove(sb32+MD_SB_GENERIC_CONSTANT_WORDS+7,
sb32+MD_SB_GENERIC_CONSTANT_WORDS+7+1,
(MD_SB_WORDS - (MD_SB_GENERIC_CONSTANT_WORDS+7+1))*4);
if (verbose >= 0)
pr_err("adjusting superblock of %s for 2.2/sparc compatibility.\n",
devname);