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| author | Phil Turnbull <phil.turnbull@oracle.com> | 2016-09-15 19:20:12 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2016-09-16 13:58:28 +0300 |
| commit | 42857cf512cb34c2c8cb50f1e766689d979d64e0 (patch) | |
| tree | 6092425f1347606feb4861f799022a56eb1c3e0c | |
| parent | 024c7e3756d8a42fc41fe8a9488488b9b09d1dcc (diff) | |
| download | linux-42857cf512cb34c2c8cb50f1e766689d979d64e0.tar.xz | |
configfs: Return -EFBIG from configfs_write_bin_file.
The check for writing more than cb_max_size bytes does not 'goto out' so
it is a no-op which allows users to vmalloc an arbitrary amount.
Fixes: 03607ace807b ("configfs: implement binary attributes")
Cc: stable@kernel.org
Signed-off-by: Phil Turnbull <phil.turnbull@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
| -rw-r--r-- | fs/configfs/file.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/configfs/file.c b/fs/configfs/file.c index c30cf49b69d2..2c6312db8516 100644 --- a/fs/configfs/file.c +++ b/fs/configfs/file.c @@ -333,6 +333,7 @@ configfs_write_bin_file(struct file *file, const char __user *buf, if (bin_attr->cb_max_size && *ppos + count > bin_attr->cb_max_size) { len = -EFBIG; + goto out; } tbuf = vmalloc(*ppos + count); |