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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2024-03-06 21:27:30 +0000 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-03-12 13:07:16 -0700 |
| commit | b555895c313511830762dbb2f469587a822c1759 (patch) | |
| tree | 104fd75d22e55b776c5f6e3fc2dbcade37863461 /mm/list_lru.c | |
| parent | 47932e7048df9156e96133ee90fb3e9df68dbd15 (diff) | |
mm: fix list corruption in put_pages_list
My recent change to put_pages_list() dereferences folio->lru.next after
returning the folio to the page allocator. Usually this is now on the pcp
list with other free folios, so we try to free an already-free folio.
This only happens with lists that have more than 15 entries, so it wasn't
immediately discovered. Revert to using list_for_each_safe() so we
dereference lru.next before disposing of the folio.
Link: https://lkml.kernel.org/r/20240306212749.1823380-1-willy@infradead.org
Fixes: 24835f899c01 ("mm: use free_unref_folios() in put_pages_list()")
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reported-by: "Borah, Chaitanya Kumar" <chaitanya.kumar.borah@intel.com>
Closes: https://lore.kernel.org/intel-gfx/SJ1PR11MB61292145F3B79DA58ADDDA63B9232@SJ1PR11MB6129.namprd11.prod.outlook.com/
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/list_lru.c')
0 files changed, 0 insertions, 0 deletions