From 9355aede5a3c4975e0ba8bbfe2b9d1fd73308916 Mon Sep 17 00:00:00 2001 From: Vivek Goyal Date: Fri, 1 Oct 2010 21:16:41 +0200 Subject: blkio-throttle: limit max iops value to UINT_MAX - Limit max iops value to UINT_MAX and return error to user if value is more than that instead of accepting bigger values and truncating implicitly. Signed-off-by: Jens Axboe --- block/blk-cgroup.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) (limited to 'block/blk-cgroup.c') diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 52c12130a5de..0f59b23096db 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -656,10 +656,10 @@ static int blkio_policy_parse_and_set(char *buf, { char *s[4], *p, *major_s = NULL, *minor_s = NULL; int ret; - unsigned long major, minor, temp, iops; + unsigned long major, minor, temp; int i = 0; dev_t dev; - u64 bps; + u64 bps, iops; memset(s, 0, sizeof(s)); @@ -731,13 +731,16 @@ static int blkio_policy_parse_and_set(char *buf, break; case BLKIO_THROTL_read_iops_device: case BLKIO_THROTL_write_iops_device: - ret = strict_strtoul(s[1], 10, &iops); + ret = strict_strtoull(s[1], 10, &iops); if (ret) return -EINVAL; + if (iops > THROTL_IOPS_MAX) + return -EINVAL; + newpn->plid = plid; newpn->fileid = fileid; - newpn->val.iops = iops; + newpn->val.iops = (unsigned int)iops; break; } break; -- cgit v1.2.3