tree 073507756b3de89afa01767f671fc64c1c9e1583
parent 9094d83e14661b0fe8c1d7014e734443b8f4cbb0
author Li Guifu <bluce.liguifu@huawei.com> 1595554691 +0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1599125061 +0200

f2fs: fix use-after-free issue

[ Upstream commit 99c787cfd2bd04926f1f553b30bd7dcea2caaba1 ]

During umount, f2fs_put_super() unregisters procfs entries after
f2fs_destroy_segment_manager(), it may cause use-after-free
issue when umount races with procfs accessing, fix it by relocating
f2fs_unregister_sysfs().

[Chao Yu: change commit title/message a bit]

Signed-off-by: Li Guifu <bluce.liguifu@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>