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mm: fix madivse_pageout mishandling on non-LRU page
MADV_PAGEOUT tries to isolate non-LRU pages and gets a warning from isolate_lru_page below. Fix it by checking PageLRU in advance. ------------[ cut here ]------------ trying to isolate tail page WARNING: CPU: 0 PID: 6175 at mm/folio-compat.c:158 isolate_lru_page+0x130/0x140 Modules linked in: CPU: 0 PID: 6175 Comm: syz-executor.0 Not tainted 5.18.12 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:isolate_lru_page+0x130/0x140 Link: https://lore.kernel.org/linux-mm/485f8c33.2471b.182d5726afb.Coremail.hantianshuo@iie.ac.cn/ Link: https://lkml.kernel.org/r/20220908151204.762596-1-minchan@kernel.org Fixes: 1a4e58c ("mm: introduce MADV_PAGEOUT") Signed-off-by: Minchan Kim <minchan@kernel.org> Reported-by: 韩天ç`� <hantianshuo@iie.ac.cn> Suggested-by: Yang Shi <shy828301@gmail.com> Acked-by: Yang Shi <shy828301@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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