On Thu, 2018-02-15 at 16:16 +0100, Greg Kroah-Hartman wrote: > 4.4-stable review patch. If anyone has any objections, please let me know. > > ------------------ > > From: Al Viro <v...@zeniv.linux.org.uk> > > commit 21fc61c73c3903c4c312d0802da01ec2b323d174 upstream. > > kmap() in page_follow_link_light() needed to go - allowing to hold > an arbitrary number of kmaps for long is a great way to deadlocking > the system. > > new helper (inode_nohighmem(inode)) needs to be used for pagecache > symlinks inodes; done for all in-tree cases. page_follow_link_light() > instrumented to yell about anything missed.
Except that this backport only updates ext4 and f2fs (and doesn't add the warning). I suppose that's all matters for Android, but it would be nice to get a more complete backport into 4.4-stable... Ben. > Signed-off-by: Al Viro <v...@zeniv.linux.org.uk> > Signed-off-by: Jin Qian <jinq...@google.com> > Signed-off-by: Jin Qian <jinq...@android.com> > Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> [...] -- Ben Hutchings Software Developer, Codethink Ltd.
