[ Upstream commit 2323d7baab2b18d87d9bc267452e387aa9f0060a ]
In fault_opcodes_write(), 'data' is allocated through kcalloc(). However, it is not deallocated in the following execution if an error occurs, leading to memory leaks. To fix this issue, introduce the 'free_data' label to free 'data' before returning the error.
Signed-off-by: Wenwen Wang wenwen@cs.uga.edu Reviewed-by: Leon Romanovsky leonro@mellanox.com Acked-by: Dennis Dalessandro dennis.dalessandro@intel.com Link: https://lore.kernel.org/r/1566154486-3713-1-git-send-email-wenwen@cs.uga.edu Signed-off-by: Doug Ledford dledford@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/infiniband/hw/hfi1/fault.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/infiniband/hw/hfi1/fault.c b/drivers/infiniband/hw/hfi1/fault.c index 72ca0dc5f3b59..5bc811b7e6cf9 100644 --- a/drivers/infiniband/hw/hfi1/fault.c +++ b/drivers/infiniband/hw/hfi1/fault.c @@ -141,12 +141,14 @@ static ssize_t fault_opcodes_write(struct file *file, const char __user *buf, if (!data) return -ENOMEM; copy = min(len, datalen - 1); - if (copy_from_user(data, buf, copy)) - return -EFAULT; + if (copy_from_user(data, buf, copy)) { + ret = -EFAULT; + goto free_data; + }
ret = debugfs_file_get(file->f_path.dentry); if (unlikely(ret)) - return ret; + goto free_data; ptr = data; token = ptr; for (ptr = data; *ptr; ptr = end + 1, token = ptr) { @@ -195,6 +197,7 @@ static ssize_t fault_opcodes_write(struct file *file, const char __user *buf, ret = len;
debugfs_file_put(file->f_path.dentry); +free_data: kfree(data); return ret; }