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| author |   Peter Zijlstra <peterz@infradead.org> | 2020-01-24 22:08:45 +0100 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2020-06-11 15:14:53 +0200 |
| commit | ef882bfef933408360e4d9d0c2c83a1e2fc996f3 (patch) | |
| tree | d233031a2e6ab642f4d7a7c9ddf9d10f5388323d /include | |
| parent | x86/int3: Ensure that poke_int3_handler() is not traced (diff) | |
| download | wireguard-linux-ef882bfef933408360e4d9d0c2c83a1e2fc996f3.tar.xz wireguard-linux-ef882bfef933408360e4d9d0c2c83a1e2fc996f3.zip | |
x86/int3: Avoid atomic instrumentation
Use arch_atomic_*() and __READ_ONCE() to ensure nothing untoward
creeps in and ruins things.
That is; this is the INT3 text poke handler, strictly limit the code
that runs in it, lest it inadvertenly hits yet another INT3.
Reported-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/20200505135313.517429268@linutronix.de
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions