diff options
| author | Andrzej Pietrasiewicz <andrzej.p@collabora.com> | 2019-06-03 19:05:28 +0200 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2019-06-18 11:58:29 +0300 |
| commit | 508595515f4bcfe36246e4a565cf280937aeaade (patch) | |
| tree | 9ac3c5d813f03592bad53fe56ca1cb6923c5b662 /drivers/usb | |
| parent | 48f5e7493a6a0ac2cf6cf41835495a1f67f4a57c (diff) | |
| download | linux-508595515f4bcfe36246e4a565cf280937aeaade.tar.gz | |
usb: gadget: Zero ffs_io_data
In some cases the "Allocate & copy" block in ffs_epfile_io() is not executed. Consequently, in such a case ffs_alloc_buffer() is never called and struct ffs_io_data is not initialized properly. This in turn leads to problems when ffs_free_buffer() is called at the end of ffs_epfile_io(). This patch uses kzalloc() instead of kmalloc() in the aio case and memset() in non-aio case to properly initialize struct ffs_io_data. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/gadget/function/f_fs.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c index c7ed90084d1a..213ff03c8a9f 100644 --- a/drivers/usb/gadget/function/f_fs.c +++ b/drivers/usb/gadget/function/f_fs.c @@ -1183,11 +1183,12 @@ static ssize_t ffs_epfile_write_iter(struct kiocb *kiocb, struct iov_iter *from) ENTER(); if (!is_sync_kiocb(kiocb)) { - p = kmalloc(sizeof(io_data), GFP_KERNEL); + p = kzalloc(sizeof(io_data), GFP_KERNEL); if (unlikely(!p)) return -ENOMEM; p->aio = true; } else { + memset(p, 0, sizeof(*p)); p->aio = false; } @@ -1219,11 +1220,12 @@ static ssize_t ffs_epfile_read_iter(struct kiocb *kiocb, struct iov_iter *to) ENTER(); if (!is_sync_kiocb(kiocb)) { - p = kmalloc(sizeof(io_data), GFP_KERNEL); + p = kzalloc(sizeof(io_data), GFP_KERNEL); if (unlikely(!p)) return -ENOMEM; p->aio = true; } else { + memset(p, 0, sizeof(*p)); p->aio = false; } |