hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8EXN6 CVE: NA
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When filemap_add_folio() return -ENOMEM, break read-ahead loop like what filemap_alloc_folio() does.
Signed-off-by: Liu Shixin liushixin2@huawei.com Signed-off-by: Jinjiang Tu tujinjiang@huawei.com Reviewed-by: Jan Kara jack@suse.cz --- mm/readahead.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-)
diff --git a/mm/readahead.c b/mm/readahead.c index ed23d5dec123..22dd9c8fe808 100644 --- a/mm/readahead.c +++ b/mm/readahead.c @@ -220,11 +220,18 @@ void page_cache_ra_unbounded(struct readahead_control *ractl, if (mapping->a_ops->readpages) { page->index = index + i; list_add(&page->lru, &page_pool); - } else if (add_to_page_cache_lru(page, mapping, index + i, - gfp_mask) < 0) { - put_page(page); - read_pages(ractl, &page_pool, true); - continue; + } else { + int ret; + + ret = add_to_page_cache_lru(page, mapping, index + i, + gfp_mask); + if (ret < 0) { + put_page(page); + read_pages(ractl, &page_pool, true); + if (ret == -ENOMEM) + break; + continue; + } } if (i == nr_to_read - lookahead_size) SetPageReadahead(page);