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| author | Peter Hurley <peter@hurleysoftware.com> | 2016-01-13 02:14:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-02-07 10:04:51 +0300 |
| commit | 308bbc9ab838d0ace0298268c7970ba9513e2c65 (patch) | |
| tree | d9f36e4b088a95cfffd280cda838ff4a3f5cbcc9 /drivers/extcon | |
| parent | d56edd7ed0ed46a8043ee3040ededbd190818ccf (diff) | |
| download | linux-308bbc9ab838d0ace0298268c7970ba9513e2c65.tar.xz | |
serial: omap: Prevent DoS using unprivileged ioctl(TIOCSRS485)
The omap-serial driver emulates RS485 delays using software timers,
but neglects to clamp the input values from the unprivileged
ioctl(TIOCSRS485). Because the software implementation busy-waits,
malicious userspace could stall the cpu for ~49 days.
Clamp the input values to < 100ms.
Fixes: 4a0ac0f55b18 ("OMAP: add RS485 support")
Cc: <stable@vger.kernel.org> # 3.12+
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/extcon')
0 files changed, 0 insertions, 0 deletions