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filemap: Handle error return from __filemap_get_folio()

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Smatch reports that filemap_fault() was missed in the conversion of
__filemap_get_folio() error returns from NULL to ERR_PTR.

Fixes: 66dabbb65d67 ("mm: return an ERR_PTR from __filemap_get_folio")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Reported-by: syzbot+48011b86c8ea329af1b9@syzkaller.appspotmail.com
Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Matthew Wilcox 2023-05-06 17:04:14 +01:00 committed by Linus Torvalds
parent dd9e11d647
commit 38a55db987
1 changed files with 1 additions and 1 deletions
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mm/filemap.c
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@ -3378,7 +3378,7 @@ out_retry:
* re-find the vma and come back and find our hopefully still populated
* page.
*/
if (folio)
if (!IS_ERR(folio))
folio_put(folio);
if (mapping_locked)
filemap_invalidate_unlock_shared(mapping);