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Message-ID: <tkrat.b906081cc9520c69@s5r6.in-berlin.de> Date: Sat, 31 May 2008 19:36:06 +0200 (CEST) From: Stefan Richter <stefanr@...6.in-berlin.de> To: linux1394-devel@...ts.sourceforge.net cc: linux-kernel@...r.kernel.org Subject: [PATCH] firewire: fw-ohci: use of uninitialized data in AR handler header_length and payload_length are filled with random data if an unknown tcode was read from the AR buffer (i.e. if the AR buffer contained invalid data). We still need a better strategy to recover from this, but at least handle_ar_packet now doesn't return out of bound buffer addresses anymore. Signed-off-by: Stefan Richter <stefanr@...6.in-berlin.de> --- drivers/firewire/fw-ohci.c | 5 +++++ 1 file changed, 5 insertions(+) Index: linux/drivers/firewire/fw-ohci.c =================================================================== --- linux.orig/drivers/firewire/fw-ohci.c +++ linux/drivers/firewire/fw-ohci.c @@ -548,6 +548,11 @@ static __le32 *handle_ar_packet(struct a p.header_length = 12; p.payload_length = 0; break; + + default: + /* FIXME: Stop context, discard everything, and restart? */ + p.header_length = 0; + p.payload_length = 0; } p.payload = (void *) buffer + p.header_length; -- Stefan Richter -=====-==--- -=-= ===== http://arcgraph.de/sr/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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