Commit aad1383c authored by Dan Robertson's avatar Dan Robertson Committed by Jaegeuk Kim

f2fs: check position in move range ioctl

When the move range ioctl is used, check the input and output position and
ensure that it is a non-negative value. Without this check
f2fs_get_dnode_of_data may hit a memmory bug.
Signed-off-by: default avatarDan Robertson <dan@dlrobertson.com>
Reviewed-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 335cac8b
...@@ -2768,6 +2768,9 @@ static int f2fs_move_file_range(struct file *file_in, loff_t pos_in, ...@@ -2768,6 +2768,9 @@ static int f2fs_move_file_range(struct file *file_in, loff_t pos_in,
if (IS_ENCRYPTED(src) || IS_ENCRYPTED(dst)) if (IS_ENCRYPTED(src) || IS_ENCRYPTED(dst))
return -EOPNOTSUPP; return -EOPNOTSUPP;
if (pos_out < 0 || pos_in < 0)
return -EINVAL;
if (src == dst) { if (src == dst) {
if (pos_in == pos_out) if (pos_in == pos_out)
return 0; return 0;
......
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