From: Matthew Wilcox <willy@infradead.org>
To: kernel test robot <lkp@intel.com>
Cc: William Kucharski <william.kucharski@oracle.com>,
intel-gfx@lists.freedesktop.org,
Huang Ying <ying.huang@intel.com>,
Hugh Dickins <hughd@google.com>,
linux-kernel@vger.kernel.org,
Chris Wilson <chris@chris-wilson.co.uk>,
linux-mm@kvack.org, lkp@lists.01.org,
Matthew Auld <matthew.auld@intel.com>,
Johannes Weiner <hannes@cmpxchg.org>,
cgroups@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Alexey Dobriyan <adobriyan@gmail.com>
Subject: Re: [Intel-gfx] [mm] 2037ab69a5: BUG:KASAN:null-ptr-deref_in_t
Date: Mon, 14 Sep 2020 12:27:38 +0100 [thread overview]
Message-ID: <20200914112738.GM6583@casper.infradead.org> (raw)
In-Reply-To: <20200914085545.GB28738@shao2-debian>
On Mon, Sep 14, 2020 at 04:55:45PM +0800, kernel test robot wrote:
> Greeting,
>
> FYI, we noticed the following commit (built with gcc-9):
>
> commit: 2037ab69a5cd8afe58347135010f6160ea368dd0 ("mm: Convert find_get_entry to return the head page")
Thank you!
diff --git a/mm/swap_state.c b/mm/swap_state.c
index c2fb62f660a5..a22c2430e80c 100644
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -427,6 +427,8 @@ struct page *find_get_incore_page(struct address_space *mapping, pgoff_t index)
struct swap_info_struct *si;
struct page *page = find_get_entry(mapping, index);
+ if (!page)
+ return page;
if (!xa_is_value(page))
return find_subpage(page, index);
if (!shmem_mapping(mapping))
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next prev parent reply other threads:[~2020-09-14 11:28 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-10 18:33 [Intel-gfx] [PATCH v2 0/8] Return head pages from find_*_entry Matthew Wilcox (Oracle)
2020-09-10 18:33 ` [Intel-gfx] [PATCH v2 1/8] mm: Factor find_get_incore_page out of mincore_page Matthew Wilcox (Oracle)
2020-09-10 18:33 ` [Intel-gfx] [PATCH v2 2/8] mm: Use find_get_incore_page in memcontrol Matthew Wilcox (Oracle)
2020-09-10 18:33 ` [Intel-gfx] [PATCH v2 3/8] mm: Optimise madvise WILLNEED Matthew Wilcox (Oracle)
2020-09-14 16:17 ` Qian Cai
2020-09-14 16:47 ` Qian Cai
2020-09-14 16:50 ` Matthew Wilcox
2020-09-14 19:44 ` Qian Cai
2020-09-10 18:33 ` [Intel-gfx] [PATCH v2 4/8] proc: Optimise smaps for shmem entries Matthew Wilcox (Oracle)
2020-09-10 18:33 ` [Intel-gfx] [PATCH v2 5/8] i915: Use find_lock_page instead of find_lock_entry Matthew Wilcox (Oracle)
2020-09-10 18:33 ` [Intel-gfx] [PATCH v2 6/8] mm: Convert find_get_entry to return the head page Matthew Wilcox (Oracle)
2020-09-14 8:55 ` [Intel-gfx] [mm] 2037ab69a5: BUG:KASAN:null-ptr-deref_in_t kernel test robot
2020-09-14 11:27 ` Matthew Wilcox [this message]
2020-09-10 18:33 ` [Intel-gfx] [PATCH v2 7/8] mm/shmem: Return head page from find_lock_entry Matthew Wilcox (Oracle)
2020-09-12 3:20 ` Matthew Wilcox
2020-09-10 18:33 ` [Intel-gfx] [PATCH v2 8/8] mm: Add find_lock_head Matthew Wilcox (Oracle)
2020-09-10 18:55 ` [Intel-gfx] ✗ Fi.CI.BUILD: failure for Return head pages from find_*_entry Patchwork
2020-09-12 3:49 ` [Intel-gfx] ✗ Fi.CI.BUILD: failure for Return head pages from find_*_entry (rev2) Patchwork
2020-09-14 18:37 ` [Intel-gfx] ✗ Fi.CI.BUILD: failure for Return head pages from find_*_entry (rev4) Patchwork
2020-09-15 8:10 ` [Intel-gfx] [PATCH v2 0/8] Return head pages from find_*_entry Hugh Dickins
2020-09-15 12:53 ` Naresh Kamboju
2020-09-15 13:08 ` Matthew Wilcox
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