** Changed in: linux-maguro (Ubuntu)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1218415
Title:
upstart needs subreaper prctl support for touch kernels < v3.4
Status in “linux-grouper” package in Ubuntu:
Fix Committed
Status in “linux-maguro” package in Ubuntu:
Fix Committed
Bug description:
Upstart now manages the Touch session via an Upstart Session Init. To
allow that sub-init running as a non-priv user to receive all
SIGCHLD's for processes it starts, it attempts to use
PR_SET_CHILD_SUBREAPER. However, that prctl was added in kernel 3.4
and the kernel on my Nexus 7 is 3.1.10-6-grouper so does not have
subreaper support:
$ sudo grep subreaper /var/log/upstart/ubuntu-touch-session-phablet.log
init: Unable to register as subreaper: Invalid argument
As such, please cherry-pick the following to all Touch kernels older
than 3.4 (maguro and grouper):
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ebec18a6d3aa1e7d84aab16225e87fd25170ec2b
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