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| H A D | base.c | 54354c6a Wed Sep 29 17:02:13 CDT 2021 Kees Cook <keescook@chromium.org> Revert "proc/wchan: use printk format instead of lookup_symbol_name()"
This reverts commit 152c432b128cb043fc107e8f211195fe94b2159c.
When a kernel address couldn't be symbolized for /proc/$pid/wchan, it
would leak the raw value, a potential information exposure. This is a
regression compared to the safer pre-v5.12 behavior.
Reported-by: kernel test robot <oliver.sang@intel.com>
Reported-by: Vito Caputo <vcaputo@pengaru.com>
Reported-by: Jann Horn <jannh@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20211008111626.090829198@infradead.org
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