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authorOleg Nesterov <oleg@redhat.com>2012-08-26 21:12:11 +0200
committerIngo Molnar <mingo@kernel.org>2012-09-13 16:47:34 +0200
commit9da33de62431c7839f98156720862262272a8380 (patch)
tree1a05e4bab566cf0aeba5890e536387c0859012ac /security/keys
parentac3d0da8f3290b3d394cdb7f50604424a7cd6092 (diff)
downloadop-kernel-dev-9da33de62431c7839f98156720862262272a8380.zip
op-kernel-dev-9da33de62431c7839f98156720862262272a8380.tar.gz
task_work: task_work_add() should not succeed after exit_task_work()
ed3e694d "move exit_task_work() past exit_files() et.al" destroyed the add/exit synchronization we had, the caller itself should ensure task_work_add() can't race with the exiting task. However, this is not convenient/simple, and the only user which tries to do this is buggy (see the next patch). Unless the task is current, there is simply no way to do this in general. Change exit_task_work()->task_work_run() to use the dummy "work_exited" entry to let task_work_add() know it should fail. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20120826191211.GA4228@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'security/keys')
0 files changed, 0 insertions, 0 deletions
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