https://github.com/torvalds/linux
Revision 13fbca4c6ecd96ec1a1cfa2e4f2ce191fe928a5e authored by Thomas Gleixner on 03 June 2014, 12:27:07 UTC, committed by Linus Torvalds on 05 June 2014, 19:31:07 UTC
If the owner died bit is set at futex_unlock_pi, we currently do not
cleanup the user space futex.  So the owner TID of the current owner
(the unlocker) persists.  That's observable inconsistant state,
especially when the ownership of the pi state got transferred.

Clean it up unconditionally.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Kees Cook <keescook@chromium.org>
Cc: Will Drewry <wad@chromium.org>
Cc: Darren Hart <dvhart@linux.intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent b3eaa9f
History
Tip revision: 13fbca4c6ecd96ec1a1cfa2e4f2ce191fe928a5e authored by Thomas Gleixner on 03 June 2014, 12:27:07 UTC
futex: Always cleanup owner tid in unlock_pi
Tip revision: 13fbca4
File Mode Size
kvm

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