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| author |   Dmitry Vyukov <dvyukov@google.com> | 2015-09-29 15:54:58 -0700 |
|---|---|---|
| committer |   Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2015-09-29 16:08:29 -0700 |
| commit | 218c1f76b8b25d6dc9d01443f071cb618e206b0c (patch) | |
| tree | ecd48ba4dadb9da65b5ccb3cb86afc8f692b1fdd /drivers/virt | |
| parent | Input: elan_i2c - add all valid ic type for i2c/smbus (diff) | |
| download | linux-dev-218c1f76b8b25d6dc9d01443f071cb618e206b0c.tar.xz linux-dev-218c1f76b8b25d6dc9d01443f071cb618e206b0c.zip | |
Input: psmouse - fix data race in __ps2_command
The data race happens on ps2dev->cmdcnt and ps2dev->cmdbuf contents.
__ps2_command reads that data concurrently with the interrupt handler. As
the result, for example, if a response arrives just after the timeout,
__ps2_command can copy out garbage from ps2dev->cmdbuf but then see that
ps2dev->cmdcnt is 0 and return success.
Stop the interrupt handler with serio_pause_rx() before reading the
results.
The data race was found with KernelThreadSanitizer (KTSAN).
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/virt')
0 files changed, 0 insertions, 0 deletions