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i3c: master: fix a memory leak bug

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In i3c_master_getmwl_locked(), the buffer used for the dest payload data is
allocated using kzalloc() in i3c_ccc_cmd_dest_init(). Later on, the length
of the dest payload data is checked against 'sizeof(*mwl)'. If they are not
equal, -EIO is returned to indicate the error. However, the allocated
buffer is not deallocated on this path, leading to a memory leak.

To fix the above issue, free the buffer before returning the error.

Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
This commit is contained in:
Wenwen Wang 2019-08-11 13:33:06 -05:00 committed by Boris Brezillon
parent b1ac3a4b9a
commit 7afe9a4e56
1 changed files with 4 additions and 2 deletions
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6
drivers/i3c/master.c
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@ -1041,8 +1041,10 @@ static int i3c_master_getmwl_locked(struct i3c_master_controller *master,
if (ret)
goto out;
if (dest.payload.len != sizeof(*mwl))
return -EIO;
if (dest.payload.len != sizeof(*mwl)) {
ret = -EIO;
goto out;
}
info->max_write_len = be16_to_cpu(mwl->len);