diff options
| author | SeongJae Park <[email protected]> | 2023-10-19 19:49:22 +0000 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2023-10-25 16:47:15 -0700 |
| commit | 3bafc47d3c4a2fc4d3b382aeb3c087f8fc84d9fd (patch) | |
| tree | ca24b9c75176b8588462d1ceb65dbb290d058e3a /lib/test_fortify/write_overflow-strncpy-src.c | |
| parent | d35963bfb05877455228ecec6b194f624489f96a (diff) | |
mm/damon/ops-common: avoid divide-by-zero during region hotness calculation
When calculating the hotness of each region for the under-quota regions
prioritization, DAMON divides some values by the maximum nr_accesses.
However, due to the type of the related variables, simple division-based
calculation of the divisor can return zero. As a result, divide-by-zero
is possible. Fix it by using damon_max_nr_accesses(), which handles the
case.
Link: https://lkml.kernel.org/r/[email protected]
Fixes: 198f0f4c58b9 ("mm/damon/vaddr,paddr: support pageout prioritization")
Signed-off-by: SeongJae Park <[email protected]>
Reported-by: Jakub Acs <[email protected]>
Cc: <[email protected]> [5.16+]
Signed-off-by: Andrew Morton <[email protected]>
Diffstat (limited to 'lib/test_fortify/write_overflow-strncpy-src.c')
0 files changed, 0 insertions, 0 deletions