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| author | John David Anglin <[email protected]> | 2021-12-21 18:21:22 +0000 |
|---|---|---|
| committer | Helge Deller <[email protected]> | 2021-12-21 20:07:39 +0000 |
| commit | 8f66fce0f46560b9e910787ff7ad0974441c4f9c (patch) | |
| tree | d5f798119ed692cec2c500360bc441ea5c87b8f3 /tools/perf/scripts/python/libxed.py | |
| parent | parisc: Clear stale IIR value on instruction access rights trap (diff) | |
| download | kernel-8f66fce0f46560b9e910787ff7ad0974441c4f9c.tar.gz kernel-8f66fce0f46560b9e910787ff7ad0974441c4f9c.zip | |
parisc: Correct completer in lws start
The completer in the "or,ev %r1,%r30,%r30" instruction is reversed, so we are
not clipping the LWS number when we are called from a 32-bit process (W=0).
We need to nulify the following depdi instruction when the least-significant
bit of %r30 is 1.
If the %r20 register is not clipped, a user process could perform a LWS call
that would branch to an undefined location in the kernel and potentially crash
the machine.
Signed-off-by: John David Anglin <[email protected]>
Cc: [email protected] # 4.19+
Signed-off-by: Helge Deller <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/libxed.py')
0 files changed, 0 insertions, 0 deletions