From: Ming Lei ming.lei@redhat.com
commit d2c9be89f8ebe7ebcc97676ac40f8dec1cf9b43a upstream.
8962842ca5ab ("blk-mq: avoid sysfs buffer overflow with too many CPU cores") avoids sysfs buffer overflow, and reserves one character for line break. However, the last snprintf() doesn't get correct 'size' parameter passed in, so fixed it.
Fixes: 8962842ca5ab ("blk-mq: avoid sysfs buffer overflow with too many CPU cores") Signed-off-by: Ming Lei ming.lei@redhat.com Signed-off-by: Jens Axboe axboe@kernel.dk Cc: Nobuhiro Iwamatsu nobuhiro1.iwamatsu@toshiba.co.jp Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- block/blk-mq-sysfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/block/blk-mq-sysfs.c +++ b/block/blk-mq-sysfs.c @@ -248,7 +248,7 @@ static ssize_t blk_mq_hw_sysfs_cpus_show pos += ret; }
- ret = snprintf(pos + page, size - pos, "\n"); + ret = snprintf(pos + page, size + 1 - pos, "\n"); return pos + ret; }