From: SeongJae Park <sj@xxxxxxxxxx> Subject: mm/damon/vaddr: hide kernel pointer from damon_va_three_regions() failure log The failure log message for 'damon_va_three_regions()' prints the target id, which is a 'struct pid' pointer in the case. To avoid exposing the kernel pointer via the log, this commit makes the log to use the index of the target in the context's targets list instead. Link: https://lkml.kernel.org/r/20211229131016.23641-4-sj@xxxxxxxxxx Signed-off-by: SeongJae Park <sj@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/damon/vaddr.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) --- a/mm/damon/vaddr.c~mm-damon-vaddr-hide-kernel-pointer-from-damon_va_three_regions-failure-log +++ a/mm/damon/vaddr.c @@ -232,13 +232,19 @@ static int damon_va_three_regions(struct static void __damon_va_init_regions(struct damon_ctx *ctx, struct damon_target *t) { + struct damon_target *ti; struct damon_region *r; struct damon_addr_range regions[3]; unsigned long sz = 0, nr_pieces; - int i; + int i, tidx = 0; if (damon_va_three_regions(t, regions)) { - pr_debug("Failed to get three regions of target %lu\n", t->id); + damon_for_each_target(ti, ctx) { + if (ti == t) + break; + tidx++; + } + pr_debug("Failed to get three regions of %dth target\n", tidx); return; } _
