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| author | Ian Abbott <abbotti@mev.co.uk> | 2017-07-28 16:22:31 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-07-30 08:38:43 -0700 |
| commit | cef988642cdac44e910a27cb6e8166c96f86a0df (patch) | |
| tree | 9d37e47ac1f93848411853aa531cb42c767cbbd9 /COPYING | |
| parent | 055655a9f0fefef2256310a128a4cdaff8b8c432 (diff) | |
| download | linux-stable-cef988642cdac44e910a27cb6e8166c96f86a0df.tar.gz linux-stable-cef988642cdac44e910a27cb6e8166c96f86a0df.tar.bz2 linux-stable-cef988642cdac44e910a27cb6e8166c96f86a0df.zip | |
staging: comedi: comedi_fops: do not call blocking ops when !TASK_RUNNING
Comedi's read and write file operation handlers (`comedi_read()` and
`comedi_write()`) currently call `copy_to_user()` or `copy_from_user()`
whilst in the `TASK_INTERRUPTIBLE` state, which falls foul of the
`might_fault()` checks when enabled. Fix it by setting the current task
state back to `TASK_RUNNING` a bit earlier before calling these
functions.
Reported-by: Piotr Gregor <piotrgregor@rsyncme.org>
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Cc: <stable@vger.kernel.org> # 4.5+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'COPYING')
0 files changed, 0 insertions, 0 deletions