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| author | Lu Baolu <baolu.lu@linux.intel.com> | 2017-01-03 17:28:46 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-03 17:37:32 +0100 |
| commit | 2b985467371a58ae44d76c7ba12b0951fee6ed98 (patch) | |
| tree | df6c8bbae1e165624af259bb8de5c1d77a4aeb60 /scripts | |
| parent | usb: return error code when platform_get_irq fails (diff) | |
| download | linux-2b985467371a58ae44d76c7ba12b0951fee6ed98.tar.xz linux-2b985467371a58ae44d76c7ba12b0951fee6ed98.zip | |
usb: xhci: fix possible wild pointer
handle_cmd_completion() frees a command structure which might be still
referenced by xhci->current_cmd.
This might cause problem when xhci->current_cmd is accessed after that.
A real-life case could be like this. The host takes a very long time to
respond to a command, and the command timer is fired at the same time
when the command completion event arrives. The command completion
handler frees xhci->current_cmd before the timer function can grab
xhci->lock. Afterward, timer function grabs the lock and go ahead with
checking and setting members of xhci->current_cmd.
Cc: <stable@vger.kernel.org> # v3.16+
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'scripts')
0 files changed, 0 insertions, 0 deletions