linux/fs/zonefs
Damien Le Moal 6bea0225a4 zonefs: fix page reference and BIO leak
In zonefs_file_dio_append(), the pages obtained using
bio_iov_iter_get_pages() are not released on completion of the
REQ_OP_APPEND BIO, nor when bio_iov_iter_get_pages() fails.
Furthermore, a call to bio_put() is missing when
bio_iov_iter_get_pages() fails.

Fix these resource leaks by adding BIO resource release code (bio_put()i
and bio_release_pages()) at the end of the function after the BIO
execution and add a jump to this resource cleanup code in case of
bio_iov_iter_get_pages() failure.

While at it, also fix the call to task_io_account_write() to be passed
the correct BIO size instead of bio_iov_iter_get_pages() return value.

Reported-by: Christoph Hellwig <hch@lst.de>
Fixes: 02ef12a663 ("zonefs: use REQ_OP_ZONE_APPEND for sync DIO")
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2020-12-10 15:14:19 +09:00
..
Kconfig zonefs: select FS_IOMAP 2020-02-26 16:58:15 +09:00
Makefile
super.c zonefs: fix page reference and BIO leak 2020-12-10 15:14:19 +09:00
zonefs.h zonefs: open/close zone on file open/close 2020-09-15 18:32:52 +09:00