3.2.47-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Vladimir Murzin <murzin.v@xxxxxxxxx> 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@xxxxxxxxx> Tested-by: Sergey Dyasly <dserrg@xxxxxxxxx> Signed-off-by: Vladimir Murzin <murzin.v@xxxxxxxxx> Signed-off-by: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx> Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx> --- drivers/usb/host/xhci-mem.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -1755,6 +1755,9 @@ void xhci_mem_cleanup(struct xhci_hcd *x } spin_unlock_irqrestore(&xhci->lock, flags); + if (!xhci->rh_bw) + goto no_bw; + num_ports = HCS_MAX_PORTS(xhci->hcs_params1); for (i = 0; i < num_ports; i++) { struct xhci_interval_bw_table *bwt = &xhci->rh_bw[i].bw_table; @@ -1773,6 +1776,7 @@ void xhci_mem_cleanup(struct xhci_hcd *x } } +no_bw: xhci->num_usb2_ports = 0; xhci->num_usb3_ports = 0; xhci->num_active_eps = 0; -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html