On Sat, May 07, 2011 at 09:20:04PM +0000, James Bottomley wrote: > commit: 07fa7a0a8a586c01a8b416358c7012dcb9dc688d > From: Frederic Weisbecker <[email protected]> > Date: Fri, 8 Apr 2011 17:29:36 +0200 > Subject: [PATCH] powerpc, hw_breakpoints: Fix racy access to ptrace > breakpoints > > While the tracer accesses ptrace breakpoints, the child task may > concurrently exit due to a SIGKILL and thus release its breakpoints > at the same time. We can then dereference some freed pointers. > > To fix this, hold a reference on the child breakpoints before > manipulating them. > > Reported-by: Oleg Nesterov <[email protected]> > Signed-off-by: Frederic Weisbecker <[email protected]> > Acked-by: Prasad <[email protected]> > Cc: Ingo Molnar <[email protected]> > Cc: Peter Zijlstra <[email protected]> > Cc: Will Deacon <[email protected]> > Cc: Paul Mundt <[email protected]> > Cc: v2.6.33.. <[email protected]> > Link: > http://lkml.kernel.org/r/[email protected]
As commit 925f83c085e1bb08435556c5b4844a60de002e31 reverts this patch, I'm not going to apply this to the stable tree as it makes no sense. thanks, greg k-h _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
