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staging: r8712: Fix memory leak in _r8712_init_xmit_priv()
In the above mentioned routine, memory is allocated in several places. If the first succeeds and a later one fails, the routine will leak memory. This patch fixes commit2865d42c78
("staging: r8712u: Add the new driver to the mainline kernel"). A potential memory leak in r8712_xmit_resource_alloc() is also addressed. Fixes:2865d42c78
("staging: r8712u: Add the new driver to the mainline kernel") Reported-by: syzbot+cf71097ffb6755df8251@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/x/log.txt?x=11ac3fa0a80000 Cc: stable@vger.kernel.org Cc: Nam Cao <namcaov@gmail.com> Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net> Reviewed-by: Nam Cao <namcaov@gmail.com> Link: https://lore.kernel.org/r/20230714175417.18578-1-Larry.Finger@lwfinger.net Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
6eaae19807
commit
ac83631230
2 changed files with 40 additions and 9 deletions
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@ -21,6 +21,7 @@
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#include "osdep_intf.h"
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#include "osdep_intf.h"
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#include "usb_ops.h"
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#include "usb_ops.h"
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#include <linux/usb.h>
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#include <linux/ieee80211.h>
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#include <linux/ieee80211.h>
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static const u8 P802_1H_OUI[P80211_OUI_LEN] = {0x00, 0x00, 0xf8};
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static const u8 P802_1H_OUI[P80211_OUI_LEN] = {0x00, 0x00, 0xf8};
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@ -55,6 +56,7 @@ int _r8712_init_xmit_priv(struct xmit_priv *pxmitpriv,
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sint i;
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sint i;
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struct xmit_buf *pxmitbuf;
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struct xmit_buf *pxmitbuf;
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struct xmit_frame *pxframe;
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struct xmit_frame *pxframe;
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int j;
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memset((unsigned char *)pxmitpriv, 0, sizeof(struct xmit_priv));
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memset((unsigned char *)pxmitpriv, 0, sizeof(struct xmit_priv));
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spin_lock_init(&pxmitpriv->lock);
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spin_lock_init(&pxmitpriv->lock);
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@ -117,11 +119,8 @@ int _r8712_init_xmit_priv(struct xmit_priv *pxmitpriv,
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_init_queue(&pxmitpriv->pending_xmitbuf_queue);
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_init_queue(&pxmitpriv->pending_xmitbuf_queue);
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pxmitpriv->pallocated_xmitbuf =
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pxmitpriv->pallocated_xmitbuf =
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kmalloc(NR_XMITBUFF * sizeof(struct xmit_buf) + 4, GFP_ATOMIC);
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kmalloc(NR_XMITBUFF * sizeof(struct xmit_buf) + 4, GFP_ATOMIC);
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if (!pxmitpriv->pallocated_xmitbuf) {
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if (!pxmitpriv->pallocated_xmitbuf)
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kfree(pxmitpriv->pallocated_frame_buf);
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goto clean_up_frame_buf;
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pxmitpriv->pallocated_frame_buf = NULL;
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return -ENOMEM;
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}
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pxmitpriv->pxmitbuf = pxmitpriv->pallocated_xmitbuf + 4 -
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pxmitpriv->pxmitbuf = pxmitpriv->pallocated_xmitbuf + 4 -
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((addr_t)(pxmitpriv->pallocated_xmitbuf) & 3);
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((addr_t)(pxmitpriv->pallocated_xmitbuf) & 3);
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pxmitbuf = (struct xmit_buf *)pxmitpriv->pxmitbuf;
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pxmitbuf = (struct xmit_buf *)pxmitpriv->pxmitbuf;
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@ -129,13 +128,17 @@ int _r8712_init_xmit_priv(struct xmit_priv *pxmitpriv,
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INIT_LIST_HEAD(&pxmitbuf->list);
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INIT_LIST_HEAD(&pxmitbuf->list);
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pxmitbuf->pallocated_buf =
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pxmitbuf->pallocated_buf =
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kmalloc(MAX_XMITBUF_SZ + XMITBUF_ALIGN_SZ, GFP_ATOMIC);
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kmalloc(MAX_XMITBUF_SZ + XMITBUF_ALIGN_SZ, GFP_ATOMIC);
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if (!pxmitbuf->pallocated_buf)
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if (!pxmitbuf->pallocated_buf) {
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return -ENOMEM;
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j = 0;
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goto clean_up_alloc_buf;
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}
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pxmitbuf->pbuf = pxmitbuf->pallocated_buf + XMITBUF_ALIGN_SZ -
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pxmitbuf->pbuf = pxmitbuf->pallocated_buf + XMITBUF_ALIGN_SZ -
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((addr_t) (pxmitbuf->pallocated_buf) &
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((addr_t) (pxmitbuf->pallocated_buf) &
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(XMITBUF_ALIGN_SZ - 1));
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(XMITBUF_ALIGN_SZ - 1));
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if (r8712_xmit_resource_alloc(padapter, pxmitbuf))
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if (r8712_xmit_resource_alloc(padapter, pxmitbuf)) {
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return -ENOMEM;
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j = 1;
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goto clean_up_alloc_buf;
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}
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list_add_tail(&pxmitbuf->list,
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list_add_tail(&pxmitbuf->list,
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&(pxmitpriv->free_xmitbuf_queue.queue));
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&(pxmitpriv->free_xmitbuf_queue.queue));
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pxmitbuf++;
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pxmitbuf++;
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@ -146,6 +149,28 @@ int _r8712_init_xmit_priv(struct xmit_priv *pxmitpriv,
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init_hwxmits(pxmitpriv->hwxmits, pxmitpriv->hwxmit_entry);
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init_hwxmits(pxmitpriv->hwxmits, pxmitpriv->hwxmit_entry);
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tasklet_setup(&pxmitpriv->xmit_tasklet, r8712_xmit_bh);
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tasklet_setup(&pxmitpriv->xmit_tasklet, r8712_xmit_bh);
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return 0;
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return 0;
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clean_up_alloc_buf:
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if (j) {
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/* failure happened in r8712_xmit_resource_alloc()
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* delete extra pxmitbuf->pallocated_buf
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*/
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kfree(pxmitbuf->pallocated_buf);
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}
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for (j = 0; j < i; j++) {
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int k;
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pxmitbuf--; /* reset pointer */
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kfree(pxmitbuf->pallocated_buf);
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for (k = 0; k < 8; k++) /* delete xmit urb's */
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usb_free_urb(pxmitbuf->pxmit_urb[k]);
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}
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kfree(pxmitpriv->pallocated_xmitbuf);
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pxmitpriv->pallocated_xmitbuf = NULL;
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clean_up_frame_buf:
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kfree(pxmitpriv->pallocated_frame_buf);
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pxmitpriv->pallocated_frame_buf = NULL;
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return -ENOMEM;
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}
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}
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void _free_xmit_priv(struct xmit_priv *pxmitpriv)
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void _free_xmit_priv(struct xmit_priv *pxmitpriv)
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@ -112,6 +112,12 @@ int r8712_xmit_resource_alloc(struct _adapter *padapter,
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for (i = 0; i < 8; i++) {
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for (i = 0; i < 8; i++) {
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pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
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pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
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if (!pxmitbuf->pxmit_urb[i]) {
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if (!pxmitbuf->pxmit_urb[i]) {
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int k;
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for (k = i - 1; k >= 0; k--) {
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/* handle allocation errors part way through loop */
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usb_free_urb(pxmitbuf->pxmit_urb[k]);
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}
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netdev_err(padapter->pnetdev, "pxmitbuf->pxmit_urb[i] == NULL\n");
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netdev_err(padapter->pnetdev, "pxmitbuf->pxmit_urb[i] == NULL\n");
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return -ENOMEM;
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return -ENOMEM;
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}
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}
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