]> git.baikalelectronics.ru Git - kernel.git/commit
direct-io: Prevent NULL pointer access in submit_page_section
authorAndreas Gruenbacher <agruenba@redhat.com>
Mon, 9 Oct 2017 09:13:18 +0000 (11:13 +0200)
committerAl Viro <viro@zeniv.linux.org.uk>
Wed, 11 Oct 2017 03:10:02 +0000 (23:10 -0400)
commit899f0429c7d3eed886406cd72182bee3b96aa1f9
tree9788036e0f8aa463f6feca6dd8d8a06eeaf8728b
parent8a5776a5f49812d29fe4b2d0a2d71675c3facf3f
direct-io: Prevent NULL pointer access in submit_page_section

In the code added to function submit_page_section by commit b1058b981,
sdio->bio can currently be NULL when calling dio_bio_submit.  This then
leads to a NULL pointer access in dio_bio_submit, so check for a NULL
bio in submit_page_section before trying to submit it instead.

Fixes xfstest generic/250 on gfs2.

Cc: stable@vger.kernel.org # v3.10+
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
fs/direct-io.c