| Message ID | 07ae41b981f1b5f8de80a3f0a8ab2f34034077a6.1680172791.git.johannes.thumshirn@wdc.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | bio: check return values of bio_add_page | expand |
On Thu, Mar 30, 2023 at 3:44 AM Johannes Thumshirn <johannes.thumshirn@wdc.com> wrote: > > alloc_behind_master_bio() can possibly add multiple pages to a bio, but it > is not checking for the return value of bio_add_page() if adding really > succeeded. > > Check if the page adding succeeded and if not bail out. > > Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> > Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> > --- > drivers/md/raid1.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c > index 68a9e2d9985b..bd7c339a84a1 100644 > --- a/drivers/md/raid1.c > +++ b/drivers/md/raid1.c > @@ -1147,7 +1147,8 @@ static void alloc_behind_master_bio(struct r1bio *r1_bio, > if (unlikely(!page)) > goto free_pages; > > - bio_add_page(behind_bio, page, len, 0); > + if (!bio_add_page(behind_bio, page, len, 0)) > + goto free_pages; We will leak page here, no? Thanks, Song
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 68a9e2d9985b..bd7c339a84a1 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -1147,7 +1147,8 @@ static void alloc_behind_master_bio(struct r1bio *r1_bio, if (unlikely(!page)) goto free_pages; - bio_add_page(behind_bio, page, len, 0); + if (!bio_add_page(behind_bio, page, len, 0)) + goto free_pages; size -= len; i++;