From: Mathias Nyman <mathias.nyman@linux.intel.com>
To: <gregkh@linuxfoundation.org>
Cc: <linux-usb@vger.kernel.org>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Mathias Nyman <mathias.nyman@linux.intel.com>
Subject: [PATCH 01/14] xhci: mem: Carefully calculate size for memory allocations
Date: Fri, 17 Mar 2023 17:47:02 +0200 [thread overview]
Message-ID: <20230317154715.535523-2-mathias.nyman@linux.intel.com> (raw)
In-Reply-To: <20230317154715.535523-1-mathias.nyman@linux.intel.com>
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Carefully calculate size for memory allocations, i.e. with help
of size_mul() macro from overflow.h.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
---
drivers/usb/host/xhci-mem.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index d0a9467aa5fc..c385513ad00b 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -9,6 +9,7 @@
*/
#include <linux/usb.h>
+#include <linux/overflow.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/dmapool.h>
@@ -568,7 +569,7 @@ static struct xhci_stream_ctx *xhci_alloc_stream_ctx(struct xhci_hcd *xhci,
gfp_t mem_flags)
{
struct device *dev = xhci_to_hcd(xhci)->self.sysdev;
- size_t size = sizeof(struct xhci_stream_ctx) * num_stream_ctxs;
+ size_t size = size_mul(sizeof(struct xhci_stream_ctx), num_stream_ctxs);
if (size > MEDIUM_STREAM_ARRAY_SIZE)
return dma_alloc_coherent(dev, size,
@@ -1660,7 +1661,7 @@ static int scratchpad_alloc(struct xhci_hcd *xhci, gfp_t flags)
goto fail_sp;
xhci->scratchpad->sp_array = dma_alloc_coherent(dev,
- num_sp * sizeof(u64),
+ size_mul(sizeof(u64), num_sp),
&xhci->scratchpad->sp_dma, flags);
if (!xhci->scratchpad->sp_array)
goto fail_sp2;
@@ -1799,7 +1800,7 @@ int xhci_alloc_erst(struct xhci_hcd *xhci,
struct xhci_segment *seg;
struct xhci_erst_entry *entry;
- size = sizeof(struct xhci_erst_entry) * evt_ring->num_segs;
+ size = size_mul(sizeof(struct xhci_erst_entry), evt_ring->num_segs);
erst->entries = dma_alloc_coherent(xhci_to_hcd(xhci)->self.sysdev,
size, &erst->erst_dma_addr, flags);
if (!erst->entries)
@@ -1830,7 +1831,7 @@ xhci_free_interrupter(struct xhci_hcd *xhci, struct xhci_interrupter *ir)
if (!ir)
return;
- erst_size = sizeof(struct xhci_erst_entry) * (ir->erst.num_entries);
+ erst_size = sizeof(struct xhci_erst_entry) * ir->erst.num_entries;
if (ir->erst.entries)
dma_free_coherent(dev, erst_size,
ir->erst.entries,
--
2.25.1
next prev parent reply other threads:[~2023-03-17 15:46 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-17 15:47 [PATCH 00/14] xhci features for usb-next Mathias Nyman
2023-03-17 15:47 ` Mathias Nyman [this message]
2023-03-17 15:47 ` [PATCH 02/14] xhci: mem: Use dma_poll_zalloc() instead of explicit memset() Mathias Nyman
2023-03-17 15:47 ` [PATCH 03/14] xhci: mem: Get rid of redundant 'else' Mathias Nyman
2023-03-17 15:47 ` [PATCH 04/14] xhci: mem: Drop useless return:s Mathias Nyman
2023-03-17 15:47 ` [PATCH 05/14] xhci: mem: Use while (i--) pattern to clean up Mathias Nyman
2023-03-17 15:47 ` [PATCH 06/14] xhci: mem: Replace explicit castings with appropriate specifiers Mathias Nyman
2023-03-17 15:47 ` [PATCH 07/14] xhci: mem: Join string literals back Mathias Nyman
2023-03-17 15:47 ` [PATCH 08/14] xhci: dbc: Provide sysfs option to configure dbc descriptors Mathias Nyman
2023-03-17 15:47 ` [PATCH 09/14] xhci: Avoid PCI MSI/MSIX interrupt reinitialization at resume Mathias Nyman
2023-03-17 15:47 ` [PATCH 10/14] xhci: Move functions to setup msi to xhci-pci Mathias Nyman
2023-03-17 15:47 ` [PATCH 11/14] xhci: move PCI specific MSI/MSIX cleanup away from generic xhci functions Mathias Nyman
2023-03-17 15:47 ` [PATCH 12/14] xhci: Move functions to cleanup MSI to xhci-pci Mathias Nyman
2023-03-17 15:47 ` [PATCH 13/14] xhci: Call MSI sync function from xhci-pci instead of generic xhci code Mathias Nyman
2023-03-17 15:47 ` [PATCH 14/14] xhci: Move xhci MSI sync function to to xhci-pci Mathias Nyman
2023-03-17 15:53 ` [PATCH 00/14] xhci features for usb-next Mathias Nyman
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