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authorAndreas Gruenbacher <agruenba@redhat.com>2021-07-15 19:58:05 +0300
committerDarrick J. Wong <djwong@kernel.org>2021-07-15 19:58:05 +0300
commit637d3375953e052a62c0db409557e3b3354be88a (patch)
treec94345add21f71bc52fde903629875a082ff998c /fs/iomap
parent8e1bcef8e18d0fec4afe527c074bb1fd6c2b140c (diff)
downloadlinux-637d3375953e052a62c0db409557e3b3354be88a.tar.xz
iomap: Don't create iomap_page objects for inline files
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: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Diffstat (limited to 'fs/iomap')
-rw-r--r--fs/iomap/buffered-io.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index ad976634d56b..41076bab18cb 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;