forked from luck/tmp_suning_uos_patched
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: Dan Robertson <dan@dlrobertson.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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@ -2768,6 +2768,9 @@ static int f2fs_move_file_range(struct file *file_in, loff_t pos_in,
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if (IS_ENCRYPTED(src) || IS_ENCRYPTED(dst))
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return -EOPNOTSUPP;
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if (pos_out < 0 || pos_in < 0)
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return -EINVAL;
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if (src == dst) {
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if (pos_in == pos_out)
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return 0;
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