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| author | Mel Gorman <mgorman@techsingularity.net> | 2021-09-27 12:46:35 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2021-10-01 13:57:57 +0200 |
| commit | 703066188f63d66cc6b9d678e5b5ef1213c5938e (patch) | |
| tree | 28aece1cc7321f64178cc175a92a47ecc27833c7 /Documentation/sphinx/requirements.txt | |
| parent | 2630cde26711dab0d0b56a8be1616475be646d13 (diff) | |
sched/fair: Null terminate buffer when updating tunable_scaling
This patch null-terminates the temporary buffer in sched_scaling_write()
so kstrtouint() does not return failure and checks the value is valid.
Before:
$ cat /sys/kernel/debug/sched/tunable_scaling
1
$ echo 0 > /sys/kernel/debug/sched/tunable_scaling
-bash: echo: write error: Invalid argument
$ cat /sys/kernel/debug/sched/tunable_scaling
1
After:
$ cat /sys/kernel/debug/sched/tunable_scaling
1
$ echo 0 > /sys/kernel/debug/sched/tunable_scaling
$ cat /sys/kernel/debug/sched/tunable_scaling
0
$ echo 3 > /sys/kernel/debug/sched/tunable_scaling
-bash: echo: write error: Invalid argument
Fixes: 8a99b6833c88 ("sched: Move SCHED_DEBUG sysctl to debugfs")
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lore.kernel.org/r/20210927114635.GH3959@techsingularity.net
Diffstat (limited to 'Documentation/sphinx/requirements.txt')
0 files changed, 0 insertions, 0 deletions