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| author | Manfred Spraul <manfred@colorfullife.com> | 2022-12-16 18:04:39 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-02-03 09:50:01 +0300 |
| commit | 805afd8300998948d16bdba0358dcfeb202a70d5 (patch) | |
| tree | 66b0eab28da035317de3d2d178ab680a8a76e005 /include/linux/percpu_counter.h | |
| parent | a9dc087fd3c484fd1ed18c5efb290efaaf44ce03 (diff) | |
| download | linux-805afd8300998948d16bdba0358dcfeb202a70d5.tar.xz | |
lib/percpu_counter: percpu_counter_add_batch() overflow/underflow
Patch series "various irq handling fixes/docu updates".
If an interrupt happens between __this_cpu_read(*fbc->counters) and
this_cpu_add(*fbc->counters, amount), and that interrupt modifies the
per_cpu_counter, then the this_cpu_add() after the interrupt returns may
under/overflow.
Link: https://lkml.kernel.org/r/20221216150155.200389-1-manfred@colorfullife.com
Link: https://lkml.kernel.org/r/20221216150441.200533-1-manfred@colorfullife.com
Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Cc: "Sun, Jiebin" <jiebin.sun@intel.com>
Cc: <1vier1@web.de>
Cc: Alexander Sverdlin <alexander.sverdlin@siemens.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/percpu_counter.h')
0 files changed, 0 insertions, 0 deletions