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| author | Ming Lei <ming.lei@redhat.com> | 2019-11-04 16:26:53 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-17 20:39:59 +0100 |
| commit | c499f898286777653deac3d47885aa95ffad1046 (patch) | |
| tree | 224ba835d47923f7cfa59ec75fd4965ce6721eca /block | |
| parent | dca66097c0187a3b8e301991873eb5007f6cfae6 (diff) | |
| download | linux-stable-c499f898286777653deac3d47885aa95ffad1046.tar.gz linux-stable-c499f898286777653deac3d47885aa95ffad1046.tar.bz2 linux-stable-c499f898286777653deac3d47885aa95ffad1046.zip | |
blk-mq: make sure that line break can be printed
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>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-mq-sysfs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/blk-mq-sysfs.c b/block/blk-mq-sysfs.c index de733e8cab2e..c97fafa1b206 100644 --- a/block/blk-mq-sysfs.c +++ b/block/blk-mq-sysfs.c @@ -162,7 +162,7 @@ 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; } |