Blame SOURCES/0020-super0-Use-memmove-when-adjusting-sparc2.2-superbloc.patch
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From 2dcd6492718c2921feac993aa71ed3a7c2522077 Mon Sep 17 00:00:00 2001
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From: Jes Sorensen <jsorensen@fb.com>
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Date: Thu, 31 May 2018 13:17:46 -0400
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Subject: [RHEL7.5 PATCH 20/26] super0: Use memmove() when adjusting sparc2.2
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superblock data
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memcpy() does not allow overlapping copies, switch to memmove()
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Signed-off-by: Jes Sorensen <jsorensen@fb.com>
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---
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super0.c | 7 ++++---
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1 file changed, 4 insertions(+), 3 deletions(-)
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diff --git a/super0.c b/super0.c
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index 756cab5..42989b9 100644
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--- a/super0.c
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+++ b/super0.c
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@@ -520,9 +520,10 @@ static int update_super0(struct supertype *st, struct mdinfo *info,
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* up 4 bytes before continuing
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*/
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__u32 *sb32 = (__u32*)sb;
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- memcpy(sb32+MD_SB_GENERIC_CONSTANT_WORDS+7,
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- sb32+MD_SB_GENERIC_CONSTANT_WORDS+7+1,
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- (MD_SB_WORDS - (MD_SB_GENERIC_CONSTANT_WORDS+7+1))*4);
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+
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+ memmove(sb32+MD_SB_GENERIC_CONSTANT_WORDS+7,
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+ sb32+MD_SB_GENERIC_CONSTANT_WORDS+7+1,
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+ (MD_SB_WORDS - (MD_SB_GENERIC_CONSTANT_WORDS+7+1))*4);
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if (verbose >= 0)
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pr_err("adjusting superblock of %s for 2.2/sparc compatibility.\n",
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devname);
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--
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2.7.4
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