xhci: fix list access before init
authorVladimir Murzin <murzin.v@gmail.com>
Tue, 9 Apr 2013 18:33:31 +0000 (22:33 +0400)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 13 Jun 2013 16:44:51 +0000 (09:44 -0700)
commit5c29245cb650479f77b33453194e1e834029f2f9
tree065bd981fbec618e99377315a318301b9960d8f3
parentc5d2935c1ce3d8c8bde02b744c55c10953d411dd
xhci: fix list access before init

commit 88696ae432ce7321540ac53d9caab3de9118b094 upstream.

If for whatever reason we fall into fail path in xhci_mem_init()
before bw table gets initialized we may access the uninitialized lists
in xhci_mem_cleanup().

Check for bw table before traversing lists in cleanup routine.

This patch should be backported to kernels as old as 3.2, that contain
the commit 839c817ce67178ca3c7c7ad534c571bba1e69ebe "xhci: Store
information about roothubs and TTs."

Reported-by: Sergey Dyasly <dserrg@gmail.com>
Tested-by: Sergey Dyasly <dserrg@gmail.com>
Signed-off-by: Vladimir Murzin <murzin.v@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/host/xhci-mem.c