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| author | Paul E. McKenney <[email protected]> | 2020-08-27 09:58:19 -0700 |
|---|---|---|
| committer | Paul E. McKenney <[email protected]> | 2020-11-02 17:13:29 -0800 |
| commit | 0c6d18d84db11840dd0f3f65750c6ea0bb6b8e0d (patch) | |
| tree | a909c61492a1834bcae501fce1abe448e3975d2c /tools/perf/util/scripting-engines/trace-event-python.c | |
| parent | 3650b228f83adda7e5ee532e2b90429c03f7b9ec (diff) | |
refscale: Bounds-check module parameters
The default value for refscale.nreaders is -1, which results in the code
setting the value to three-quarters of the number of CPUs. On single-CPU
systems, this results in three-quarters of the value one, which the C
language's integer arithmetic rounds to zero. This in turn results in
a divide-by-zero error.
This commit therefore adds bounds checking to the refscale module
parameters, so that if they are less than one, they are set to the
value one.
Reported-by: kernel test robot <[email protected]>
Tested-by "Chen, Rong A" <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>
Diffstat (limited to 'tools/perf/util/scripting-engines/trace-event-python.c')
0 files changed, 0 insertions, 0 deletions