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hd-geo-test: Clean up use of buf[] in create_qcow2_with_mbr()

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valgrind reports write unitialized bytes from buf[].  Clear them.

ASan reports we store to misaligned address in buf[].  Use stl_le_p()
for that.

Cc: Sam Eiderman <shmuel.eiderman@oracle.com>
Cc: John Snow <jsnow@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20200317092354.31831-1-armbru@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
This commit is contained in:
Markus Armbruster 2020-03-17 10:23:54 +01:00 committed by John Snow
parent 1a519323d3
commit 6e9d611a1b
1 changed files with 3 additions and 3 deletions
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6
tests/qtest/hd-geo-test.c
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@ -421,7 +421,7 @@ static char *create_qcow2_with_mbr(MBRpartitions mbr, uint64_t sectors)
char *raw_path = strdup(template);
char *qcow2_path = strdup(template);
char cmd[100 + 2 * PATH_MAX];
uint8_t buf[512];
uint8_t buf[512] = {};
int i, ret, fd, offset;
uint64_t qcow2_size = sectors * 512;
uint8_t status, parttype, head, sector, cyl;
@ -457,8 +457,8 @@ static char *create_qcow2_with_mbr(MBRpartitions mbr, uint64_t sectors)
buf[offset + 0x6] = sector;
buf[offset + 0x7] = cyl;
(*(uint32_t *)&buf[offset + 0x8]) = cpu_to_le32(mbr[i].start_sect);
(*(uint32_t *)&buf[offset + 0xc]) = cpu_to_le32(mbr[i].nr_sects);
stl_le_p(&buf[offset + 0x8], mbr[i].start_sect);
stl_le_p(&buf[offset + 0xc], mbr[i].nr_sects);
offset += 0x10;
}