On Mon, Mar 05, 2018 at 12:37:59AM +0000, Ben Hutchings wrote: > 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 <viro@xxxxxxxxxxxxxxxxxx> > > > > 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... That should be all the in-tree users of this, for 4.4, right? If not, ick. Jin, can you look into this? thanks, greg k-h