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| author | SeongJae Park <sj@kernel.org> | 2023-10-19 19:49:21 +0000 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-10-25 16:47:15 -0700 |
| commit | d35963bfb05877455228ecec6b194f624489f96a (patch) | |
| tree | 6ffa5dc3d756612c92fa5a33592aada553e8cd77 /net/unix/sysctl_net_unix.c | |
| parent | 35f5d94187a6a3a8df2cba54beccca1c2379edb8 (diff) | |
mm/damon/core: avoid divide-by-zero during monitoring results update
When monitoring attributes are changed, DAMON updates access rate of the
monitoring results accordingly. For that, it 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/20231019194924.100347-3-sj@kernel.org
Fixes: 2f5bef5a590b ("mm/damon/core: update monitoring results for new monitoring attributes")
Signed-off-by: SeongJae Park <sj@kernel.org>
Reported-by: Jakub Acs <acsjakub@amazon.de>
Cc: <stable@vger.kernel.org> [6.3+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'net/unix/sysctl_net_unix.c')
0 files changed, 0 insertions, 0 deletions