]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
xhci: Fix null pointer dereference in remove if xHC has only one roothub
authorMathias Nyman <mathias.nyman@linux.intel.com>
Thu, 25 Aug 2022 15:08:38 +0000 (18:08 +0300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 25 Aug 2022 15:48:30 +0000 (17:48 +0200)
commit4a593a62a9e3a25ab4bc37f612e4edec144f7f43
treeaa50e3ff5c8bc2983e419df22b09d1432c9902e9
parent5f73aa2cf8bef4a39baa1591c3144ede4788826e
xhci: Fix null pointer dereference in remove if xHC has only one roothub

The remove path in xhci platform driver tries to remove and put both main
and shared hcds even if only a main hcd exists (one roothub)

This causes a null pointer dereference in reboot for those controllers.

Check that the shared_hcd exists before trying to remove it.

Fixes: e0fe986972f5 ("usb: host: xhci-plat: prepare operation w/o shared hcd")
Reported-by: Alexey Sheplyakov <asheplyakov@basealt.ru>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20220825150840.132216-2-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/host/xhci-plat.c