[PATCH v2 1/2] iomap: Don't create iomap_page objects for inline files
From: Andreas Gruenbacher <agruenba@redhat.com>
Date: 2021-07-05 18:18:39
Also in:
linux-fsdevel
Subsystem:
filesystems (vfs and infrastructure), filesystems [iomap], the rest · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds
In iomap_readpage_actor, don't create iop objects for inline inodes. Otherwise, iomap_read_inline_data will set PageUptodate without setting iop->uptodate, and iomap_page_release will eventually complain. To prevent this kind of bug from occurring in the future, make sure the page doesn't have private data attached in iomap_read_inline_data. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> --- fs/iomap/buffered-io.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 9023717c5188..03537ecb2a94 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c@@ -215,6 +215,7 @@ iomap_read_inline_data(struct inode *inode, struct page *page, if (PageUptodate(page)) return; + BUG_ON(page_has_private(page)); BUG_ON(page->index); BUG_ON(size > PAGE_SIZE - offset_in_page(iomap->inline_data));
@@ -239,7 +240,7 @@ iomap_readpage_actor(struct inode *inode, loff_t pos, loff_t length, void *data, { struct iomap_readpage_ctx *ctx = data; struct page *page = ctx->cur_page; - struct iomap_page *iop = iomap_page_create(inode, page); + struct iomap_page *iop; bool same_page = false, is_contig = false; loff_t orig_pos = pos; unsigned poff, plen;
@@ -252,6 +253,7 @@ iomap_readpage_actor(struct inode *inode, loff_t pos, loff_t length, void *data, } /* zero post-eof blocks as the page may be mapped */ + iop = iomap_page_create(inode, page); iomap_adjust_read_range(inode, iop, &pos, length, &poff, &plen); if (plen == 0) goto done;
--
2.26.3