mm/kmemleak: stop the task stack scan early when interrupted

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scan_block() already checks scan_should_stop() for every pointer and bails
out of the current block, but the task stack walk cannot tell and keeps
issuing a separate scan_should_stop() between every task.

Return that status from scan_block() and use it as the task stack loop
condition, so the walk stops as soon as a scan is interrupted.

Link: https://lore.kernel.org/20260615-kmemleak-stack-resched-v3-2-acecd7d7fd92@debian.org
Signed-off-by: Breno Leitao <leitao@debian.org>
Suggested-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Qian Cai <cai@lca.pw>
Cc: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

...

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Breno Leitao 2026-06-15 10:49:07 -07:00 • committed by Andrew Morton

parent 5d10d4e19e

commit eb11f56eec

1 changed files with 12 additions and 6 deletions

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mm/kmemleak.c

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