From: Xiao Ni <xni@redhat.com>
Date: Wed, 2 Jun 2021 01:17:19 +0000 (+0800)
Subject: mdadm/super1: It needs to specify int32 for bitmap_offset
X-Git-Tag: mdadm-4.2-rc2~14
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f421731c7e1de6608f8fafb551d199ff5f1d6b97;p=thirdparty%2Fmdadm.git

mdadm/super1: It needs to specify int32 for bitmap_offset

For super1.0 bitmap offset is -16. So it needs to use int type for bitmap offset.

Fixes: 1fe2e1007310 (mdadm/bitmap: locate bitmap calcuate bitmap position wrongly)
Signed-off-by: Xiao Ni <xni@redhat.com>
Signed-off-by: Jes Sorensen <jsorensen@fb.com>
---

diff --git a/super1.c b/super1.c
index c05e6237..a12a5bc8 100644
--- a/super1.c
+++ b/super1.c
@@ -2631,7 +2631,7 @@ static int locate_bitmap1(struct supertype *st, int fd, int node_num)
 	else
 		ret = -1;
 
-	offset = __le64_to_cpu(sb->super_offset) + __le32_to_cpu(sb->bitmap_offset);
+	offset = __le64_to_cpu(sb->super_offset) + (int32_t)__le32_to_cpu(sb->bitmap_offset);
 	if (node_num) {
 		bms = (bitmap_super_t*)(((char*)sb)+MAX_SB_SIZE);
 		bm_sectors_per_node = calc_bitmap_size(bms, 4096) >> 9;