| commit | a195f3d4528a2f88d6f986f6b1101775ad4891cf | [log] [tgz] |
|---|---|---|
| author | Peter Zijlstra <peterz@infradead.org> | Tue Oct 27 10:15:06 2020 +0100 |
| committer | Thomas Gleixner <tglx@linutronix.de> | Tue Oct 27 23:15:23 2020 +0100 |
| tree | f61191d9faa00ce094e8a54b215e4de01262fec7 | |
| parent | 2a9baf5ad4884108b3c6d56a50e8105ccf8a4ee7 [diff] |
x86/debug: Only clear/set ->virtual_dr6 for userspace #DB
The ->virtual_dr6 is the value used by ptrace_{get,set}_debugreg(6). A
kernel #DB clearing it could mean spurious malfunction of ptrace()
expectations.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Kyle Huey <me@kylehuey.com>
Link: https://lore.kernel.org/r/20201027093608.028952500@infradead.org