From d2c9be89f8ebe7ebcc97676ac40f8dec1cf9b43a Mon Sep 17 00:00:00 2001 From: Ming Lei Date: Mon, 4 Nov 2019 16:26:53 +0800 Subject: blk-mq: make sure that line break can be printed 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 Signed-off-by: Jens Axboe --- block/blk-mq-sysfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'block') diff --git a/block/blk-mq-sysfs.c b/block/blk-mq-sysfs.c index 4caa56d1bc85..062229395a50 100644 --- a/block/blk-mq-sysfs.c +++ b/block/blk-mq-sysfs.c @@ -175,7 +175,7 @@ static ssize_t blk_mq_hw_sysfs_cpus_show(struct blk_mq_hw_ctx *hctx, char *page) pos += ret; } - ret = snprintf(pos + page, size - pos, "\n"); + ret = snprintf(pos + page, size + 1 - pos, "\n"); return pos + ret; } -- cgit v1.2.3