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btrfs-progs: fix a buffer overflow during mkfs 

Using strncpy avoids a 1 byte overflow into the next field
of the struct.  The overflow is harmless, but does
trip automated tools.

Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>

---
 utils.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
This commit is contained in:
Jan Engelhardt 2008-01-22 11:32:06 -05:00 committed by David Woodhouse
parent 7c28445381
commit 4408248634
1 changed files with 1 additions and 1 deletions
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2
utils.c
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@ -63,7 +63,7 @@ int make_btrfs(int fd, u64 blocks[4], u64 num_bytes, u32 nodesize,
num_bytes = (num_bytes / sectorsize) * sectorsize; num_bytes = (num_bytes / sectorsize) * sectorsize;
uuid_generate(super.fsid); uuid_generate(super.fsid);
btrfs_set_super_bytenr(&super, blocks[0]); btrfs_set_super_bytenr(&super, blocks[0]);
strcpy((char *)(&super.magic), BTRFS_MAGIC); strncpy((char *)&super.magic, BTRFS_MAGIC, sizeof(super.magic));
btrfs_set_super_generation(&super, 1); btrfs_set_super_generation(&super, 1);
btrfs_set_super_root(&super, blocks[1]); btrfs_set_super_root(&super, blocks[1]);
btrfs_set_super_total_bytes(&super, num_bytes); btrfs_set_super_total_bytes(&super, num_bytes);