diff options
| author | Joe Lawrence <[email protected]> | 2016-02-03 12:51:12 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2016-02-04 17:00:10 -0800 |
| commit | 89140fdaf11aec81e93d5590a993720f2ef0d26e (patch) | |
| tree | c7abad88a88cfe4fe2d599eff868a59e18f16f17 /tools/perf/scripts/python/bin/export-to-postgresql-report | |
| parent | 207b08b9426dfaa63fcfea4156be0acb5b46ee38 (diff) | |
xhci: harden xhci_find_next_ext_cap against device removal
xhci_find_next_ext_cap doesn't check for PCI hotplug removal and may use
the PCI master abort bit pattern (~0) to calculate a new PCI address
offset to read/write. The has lead to reproducable crashes when testing
surprise removal during device initialization on a Stratus platform, at
least after commit d5ddcdf4d672 ("xhci: rework xhci extended capability
list parsing functions").
The crash is repeatable on a Stratus platform when injecting hardware
faults to induce xHCI host controller hotplug during driver
initialization. If a PCI read in xhci_find_next_ext_cap returns the
master abort pattern, quirk_usb_handoff_xhci may start using a bogus
ext_cap_offset to start searching more bogus PCI addresses.
Signed-off-by: Joe Lawrence <[email protected]>
Acked-by: Mathias Nyman <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/bin/export-to-postgresql-report')
0 files changed, 0 insertions, 0 deletions