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authorStefan Richter <stefanr@s5r6.in-berlin.de>2010-01-24 16:45:03 +0100
committerStefan Richter <stefanr@s5r6.in-berlin.de>2010-01-26 20:54:50 +0100
commit281e20323ab72180137824a298ee9e21e6f9acf6 (patch)
treeb807edaafec3c00e442d41d9091b9783a53820f9 /drivers/firewire/ohci.c
parent6d3faf6f431bafb25f4b9926c50a7e5c267738c6 (diff)
firewire: core: fix use-after-free regression in FCP handler
Commit db5d247a "firewire: fix use of multiple AV/C devices, allow multiple FCP listeners" introduced a regression into 2.6.33-rc3: The core freed payloads of incoming requests to FCP_Request or FCP_Response before a userspace driver accessed them. We need to copy such payloads for each registered userspace client and free the copies according to the lifetime rules of non-FCP client request resources. (This could possibly be optimized by reference counts instead of copies.) The presently only kernelspace driver which listens for FCP requests, firedtv, was not affected because it already copies FCP frames into an own buffer before returning to firewire-core's FCP handler dispatcher. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/firewire/ohci.c')
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