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| author |   Konstantin Khlebnikov <khlebnikov@yandex-team.ru> | 2019-02-27 11:10:20 +0300 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2019-04-19 13:42:10 +0200 |
| commit | 1a8b4540db732ca16c9e43ac7c08b1b8f0b252d8 (patch) | |
| tree | 872de05aa4f62392f99ff31a4ac5c28bbdd0a9d6 /kernel/cgroup | |
| parent | sched/core: Handle overflow in cpu_shares_write_u64 (diff) | |
| download | wireguard-linux-1a8b4540db732ca16c9e43ac7c08b1b8f0b252d8.tar.xz wireguard-linux-1a8b4540db732ca16c9e43ac7c08b1b8f0b252d8.zip | |
sched/core: Check quota and period overflow at usec to nsec conversion
Large values could overflow u64 and pass following sanity checks.
# echo 18446744073750000 > cpu.cfs_period_us
# cat cpu.cfs_period_us
40448
# echo 18446744073750000 > cpu.cfs_quota_us
# cat cpu.cfs_quota_us
40448
After this patch they will fail with -EINVAL.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/155125502079.293431.3947497929372138600.stgit@buzz
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/cgroup')
0 files changed, 0 insertions, 0 deletions