diff options
| author | Nam Cao <namcaov@gmail.com> | 2022-09-12 19:04:31 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-09-24 13:05:24 +0200 |
| commit | 2a2db520e3ca5aafba7c211abfd397666c9b5f9d (patch) | |
| tree | 85ecde641976195630ae14fc83471a10ced0a0ad /drivers/staging/vt6655 | |
| parent | 2d3cdad6ea41386d149502edafb9f59687b16fdf (diff) | |
staging: vt6655: fix some erroneous memory clean-up loops
In some initialization functions of this driver, memory is allocated with
'i' acting as an index variable and increasing from 0. The commit in
"Fixes" introduces some clean-up codes in case of allocation failure,
which free memory in reverse order with 'i' decreasing to 0. However,
there are some problems:
- The case i=0 is left out. Thus memory is leaked.
- In case memory allocation fails right from the start, the memory
freeing loops will start with i=-1 and invalid memory locations will
be accessed.
One of these loops has been fixed in commit c8ff91535880 ("staging:
vt6655: fix potential memory leak"). Fix the remaining erroneous loops.
Link: https://lore.kernel.org/linux-staging/Yx9H1zSpxmNqx6Xc@kadam/
Fixes: 5341ee0adb17 ("staging: vt6655: check for memory allocation failures")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Signed-off-by: Nam Cao <namcaov@gmail.com>
Link: https://lore.kernel.org/r/20220912170429.29852-1-namcaov@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/vt6655')
| -rw-r--r-- | drivers/staging/vt6655/device_main.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/staging/vt6655/device_main.c b/drivers/staging/vt6655/device_main.c index 04d737012cef..56c3cf3ba53d 100644 --- a/drivers/staging/vt6655/device_main.c +++ b/drivers/staging/vt6655/device_main.c @@ -631,7 +631,7 @@ err_free_rd: kfree(desc->rd_info); err_free_desc: - while (--i) { + while (i--) { desc = &priv->aRD0Ring[i]; device_free_rx_buf(priv, desc); kfree(desc->rd_info); @@ -677,7 +677,7 @@ err_free_rd: kfree(desc->rd_info); err_free_desc: - while (--i) { + while (i--) { desc = &priv->aRD1Ring[i]; device_free_rx_buf(priv, desc); kfree(desc->rd_info); @@ -782,7 +782,7 @@ static int device_init_td1_ring(struct vnt_private *priv) return 0; err_free_desc: - while (--i) { + while (i--) { desc = &priv->apTD1Rings[i]; kfree(desc->td_info); } |