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| author |   Mathias Nyman <mathias.nyman@linux.intel.com> | 2021-08-20 15:34:59 +0300 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-08-26 13:06:02 +0200 |
| commit | 4843b4b5ec64b875a5e334f280508f1f75e7d3e4 (patch) | |
| tree | c2694d4470a60cb6a17665b25f755f2e803576d5 /drivers/usb/host/xhci-ring.c | |
| parent | xhci: fix unsafe memory usage in xhci tracing (diff) | |
| download | linux-dev-4843b4b5ec64b875a5e334f280508f1f75e7d3e4.tar.xz linux-dev-4843b4b5ec64b875a5e334f280508f1f75e7d3e4.zip | |
xhci: fix even more unsafe memory usage in xhci tracing
Removes static char buffer usage in the following decode functions:
xhci_decode_ctrl_ctx()
xhci_decode_slot_context()
xhci_decode_usbsts()
xhci_decode_doorbell()
xhci_decode_ep_context()
Caller must provide a buffer to use.
In tracing use __get_str() as recommended to pass buffer.
Minor changes are needed in other xhci code as these functions are also
used elsewhere
Cc: <stable@vger.kernel.org>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20210820123503.2605901-3-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/xhci-ring.c')
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index 8fea44bbc266..d0faa67a689d 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -1212,6 +1212,7 @@ void xhci_stop_endpoint_command_watchdog(struct timer_list *t) struct xhci_hcd *xhci = ep->xhci; unsigned long flags; u32 usbsts; + char str[XHCI_MSG_MAX]; spin_lock_irqsave(&xhci->lock, flags); @@ -1225,7 +1226,7 @@ void xhci_stop_endpoint_command_watchdog(struct timer_list *t) usbsts = readl(&xhci->op_regs->status); xhci_warn(xhci, "xHCI host not responding to stop endpoint command.\n"); - xhci_warn(xhci, "USBSTS:%s\n", xhci_decode_usbsts(usbsts)); + xhci_warn(xhci, "USBSTS:%s\n", xhci_decode_usbsts(str, usbsts)); ep->ep_state &= ~EP_STOP_CMD_PENDING; |