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| author | Oleg Nesterov <oleg@redhat.com> | 2013-07-08 16:01:06 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-09 10:33:26 -0700 |
| commit | f7da04c9e363e479258135ac825734d78aecd2b0 (patch) | |
| tree | 32cbf157b2a451b559eb71f7791c9b98af044f52 /mm | |
| parent | fab840fc2d542fabcab903db8e03589a6702ba5f (diff) | |
| download | talos-op-linux-f7da04c9e363e479258135ac825734d78aecd2b0.tar.gz talos-op-linux-f7da04c9e363e479258135ac825734d78aecd2b0.zip | |
ptrace/x86: flush_ptrace_hw_breakpoint() shoule clear the virtual debug registers
flush_ptrace_hw_breakpoint() destroys the counters set by ptrace, but
"leaks" ->debugreg6 and ->ptrace_dr7.
The problem is minor, but still it doesn't look right and flush_thread()
did this until commit 66cb59172959 ("hw-breakpoints: use the new wrapper
routines to access debug registers in process/thread code"). Now that
PTRACE_DETACH does flush_ too this makes even more sense.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jan Kratochvil <jan.kratochvil@redhat.com>
Cc: Michael Neuling <mikey@neuling.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Prasad <prasad@linux.vnet.ibm.com>
Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions
