diff options
| author | Heikki Krogerus <[email protected]> | 2020-09-16 12:00:34 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2020-09-16 12:34:10 +0200 |
| commit | 386e15a650447f53de3d2d8819ce9393f31650a4 (patch) | |
| tree | db19de98cdb06759dec3331b81e143cb4757cddb /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | 130a96d698d7bee9f339832d1e47ab26aad8dbf1 (diff) | |
usb: typec: ucsi: Prevent mode overrun
Sometimes the embedded controller firmware does not
terminate the list of alternate modes that the partner
supports in its response to the GET_ALTERNATE_MODES command.
Instead the firmware returns the supported alternate modes
over and over again until the driver stops requesting them.
If that happens, the number of modes for each alternate mode
will exceed the maximum 6 that is defined in the USB Power
Delivery specification. Making sure that can't happen by
adding a check for it.
This fixes NULL pointer dereference that is caused by the
overrun.
Fixes: ad74b8649beaf ("usb: typec: ucsi: Preliminary support for alternate modes")
Cc: [email protected]
Reported-by: Zwane Mwaikambo <[email protected]>
Signed-off-by: Heikki Krogerus <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions