5.4-stable review patch. If anyone has any objections, please let me know.
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From: Joanne Koong joannelkoong@gmail.com
commit f7790d67785302b3116bbbfda62a5a44524601a3 upstream.
In the case where the aux writeback list is dropped (e.g. the pages have been truncated or the connection is broken), the stats for its pages and backing device info need to be updated as well.
Fixes: e2653bd53a98 ("fuse: fix leaked aux requests") Signed-off-by: Joanne Koong joannelkoong@gmail.com Reviewed-by: Josef Bacik josef@toxicpanda.com Cc: stable@vger.kernel.org # v5.1 Signed-off-by: Miklos Szeredi mszeredi@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/fuse/file.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
--- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -1694,10 +1694,16 @@ __acquires(fi->lock) fuse_writepage_finish(fc, wpa); spin_unlock(&fi->lock);
- /* After fuse_writepage_finish() aux request list is private */ + /* After rb_erase() aux request list is private */ for (aux = wpa->next; aux; aux = next) { + struct backing_dev_info *bdi = inode_to_bdi(aux->inode); + next = aux->next; aux->next = NULL; + + dec_wb_stat(&bdi->wb, WB_WRITEBACK); + dec_node_page_state(aux->ia.ap.pages[0], NR_WRITEBACK_TEMP); + wb_writeout_inc(&bdi->wb); fuse_writepage_free(aux); }