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MUSB: Add sanity check for maximum number of endpoints 

There is no check if platform code passes in more endpoints (num_eps)
than the maximum number of enpoints (MUSB_C_NUM_EPS.)  The result is
that allocate_instance() happily writes past the end of 'struct musb'
corrupting memory.

This patch adds a BUG() if the platform code requests more than the max.

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Acked-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Kevin Hilman 2008-09-15 12:09:31 +02:00 committed by Greg Kroah-Hartman
parent cede969fe2
commit 02582b92f6
1 changed files with 1 additions and 0 deletions
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1
drivers/usb/musb/musb_core.c
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@ -1806,6 +1806,7 @@ allocate_instance(struct device *dev,
musb->ctrl_base = mbase;
musb->nIrq = -ENODEV;
musb->config = config;
BUG_ON(musb->config->num_eps > MUSB_C_NUM_EPS);
for (epnum = 0, ep = musb->endpoints;
epnum < musb->config->num_eps;
epnum++, ep++) {