From d9b0d9ba04cf99abff9125b688c03e154598a644 Mon Sep 17 00:00:00 2001 From: Dulshani Gunawardhana Date: Thu, 31 Oct 2013 10:32:18 +0530 Subject: [PATCH] btrfs: Replace kmalloc with kmalloc_array Replace kmalloc(size * nr, ) with kmalloc_array(nr, size), thus making it easier to check is that the calculation doesn't wrap or return a smaller allocation Signed-off-by: Dulshani Gunawardhana Reviewed-by: Zach Brown Signed-off-by: Josef Bacik Signed-off-by: Chris Mason --- fs/btrfs/delayed-inode.c | 4 ++-- fs/btrfs/ioctl.c | 2 +- fs/btrfs/super.c | 2 +- fs/btrfs/volumes.c | 2 +- 4 files changed, 5 insertions(+), 5 deletions(-) diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c index 2bb8e1a988a1..8d292fbae659 100644 --- a/fs/btrfs/delayed-inode.c +++ b/fs/btrfs/delayed-inode.c @@ -770,13 +770,13 @@ static int btrfs_batch_insert_items(struct btrfs_root *root, */ btrfs_set_path_blocking(path); - keys = kmalloc(sizeof(struct btrfs_key) * nitems, GFP_NOFS); + keys = kmalloc_array(nitems, sizeof(struct btrfs_key), GFP_NOFS); if (!keys) { ret = -ENOMEM; goto out; } - data_size = kmalloc(sizeof(u32) * nitems, GFP_NOFS); + data_size = kmalloc_array(nitems, sizeof(u32), GFP_NOFS); if (!data_size) { ret = -ENOMEM; goto error; diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 78d20482b72a..3712ef86ca82 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -1198,7 +1198,7 @@ int btrfs_defrag_file(struct inode *inode, struct file *file, ra = &file->f_ra; } - pages = kmalloc(sizeof(struct page *) * max_cluster, + pages = kmalloc_array(max_cluster, sizeof(struct page *), GFP_NOFS); if (!pages) { ret = -ENOMEM; diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index c9079db7441e..1de6d4d67431 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1470,7 +1470,7 @@ static int btrfs_calc_avail_data_space(struct btrfs_root *root, u64 *free_bytes) nr_devices = fs_info->fs_devices->open_devices; BUG_ON(!nr_devices); - devices_info = kmalloc(sizeof(*devices_info) * nr_devices, + devices_info = kmalloc_array(nr_devices, sizeof(*devices_info), GFP_NOFS); if (!devices_info) return -ENOMEM; diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 3c16da51348f..0db637097862 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -4901,7 +4901,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw, num_stripes = map->num_stripes; max_errors = nr_parity_stripes(map); - raid_map = kmalloc(sizeof(u64) * num_stripes, + raid_map = kmalloc_array(num_stripes, sizeof(u64), GFP_NOFS); if (!raid_map) { ret = -ENOMEM; -- 2.30.2